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PU leather The full name of Microfiber skin is "ultra-fine fiber reinforced PU leather." It has extremely excellent wear resistance, excellent cold, breathable, anti-aging properties. PU is a polyurethane. Polyurethane leather has excellent properties. In this regard, Bayer, BASF, Huntsman's production capacity is world-class, and to Toray, Asahi representative of the textile fiber suppliers have a higher product technology. Abroad, due to the impact of animal protection associations, coupled with the development of technology, polyurethane synthetic leather performance and application of surface over the natural leather. By adding ultra-fine fibers, the toughness and permeability of polyurethane, wear resistance has been further strengthened. There is no doubt that such a finished product, the performance is quite excellent. History of Development In China, people used to use PU resin as raw material for the production of artificial leather called PU leather (PU leather); with PU resin and non-woven fabrics for the production of artificial leather called PU synthetic leather (referred to as synthetic leather). PU artificial leather, PU synthetic leather, the current industry has not yet accurately named, but it was customary to the three kinds of leather referred to as synthetic leather. In the end how to name? To be unified and standardized, to give it a more appropriate name. Synthetic leather, synthetic leather is an important component of the plastics industry, in the national economy is widely used in various industries. Artificial leather, synthetic leather production in the international community for more than 60 years of development history, China since 1958 began to develop and produce artificial leather, it is in China's plastics industry is the development of earlier industries. In recent years, China's leather, synthetic leather industry is not only the production equipment production line growth, product output growth year after year, the annual increase in color varieties, and industry development process has its own industry organizations, there is considerable cohesion, which Can the Chinese leather, synthetic leather enterprises, including the relevant industry organizations together, developed into a considerable Strength of the Industry. Following the PVC artificial leather, PU synthetic leather after 30 years of technology experts with great concentration of research and development, as an ideal alternative to natural leather, access to a breakthrough in technological progress. PU coating on the surface of the fabric first appeared in the 1950s on the market, to 1964, the United States DuPont developed a PU for the upper synthetic leather. Japanese companies to establish an annual output of 600,000 square meters of production lines, after 20 years of continuous research and development, PU synthetic leather in terms of product quality, variety, or yield have been growing rapidly. Its performance more and more close to the natural leather, some properties even more than natural leather, with natural leather to the level of true and false, in human daily life occupies a very important position. Today, Japan is the largest producer of synthetic leather, Kuraray, Teijin, Toray, bell spinning, and other products of several companies on behalf of the international 20th century, basically the level of development in the 1990s. Its fiber and non-woven manufacturing towards the ultra-fine, high density and high non-woven effect direction; its PU manufacturing toward the PU dispersion, PU water emulsion direction, product applications continue to widen, from the beginning of shoes, bags Field development to the clothing, ball, decoration and other special applications, all over the daily life of all aspects. PU leather and Natural Leather Natural leather has excellent natural properties because it is widely used in the production of daily necessities and industrial products, but with the world's population growth, human demand for leather doubled, a limited number of natural leather has long been unable to meet this demand. To solve this problem, scientists began to study a few decades ago to develop artificial leather, synthetic leather, to make up for the shortage of natural leather. More than 50 years of research process is the history of artificial leather, synthetic leather to natural leather challenge process. Scientists from the analysis of natural leather chemical composition and structure of the beginning, from the start of nitrocellulose lacquer into the PVC artificial leather, which is the first generation of artificial leather products. Scientists on this basis, made a number of improvements and exploration, the first is the improvement of the substrate, followed by the coating resin modification and improvement. To the 20th century, 70 years, non-woven synthetic fiber needle-forming network, the process of bonding into a network, so that the substrate has a lotus-like section, hollow fiber-like, to a porous structure, in line with natural leather network structure Requirements; the surface of the synthetic leather has been able to do microporous structure of polyurethane layer, the equivalent of natural leather grain, so that the appearance and internal structure of PU synthetic leather and natural leather gradually close to other physical properties are close to the natural leather Indicators, and color than the natural leather is more bright; its temperature at room temperature to reach more than 1 million times, low temperature folding can achieve the level of natural leather. Superfine fiber PU synthetic leather is the third generation of artificial leather. Its three-dimensional structure of the network of non-woven synthetic leather in the substrate to create a catch-up natural leather conditions. The product, combined with newly developed PU slurry impregnated with composite structure, has played a huge surface area of superfine fibers and strong water absorption, making the ultra-fine PU synthetic leather with a superfine beam Collagen fiber natural leather inherent moisture absorption characteristics, so no matter from the internal microstructure, or the appearance of texture and physical properties and people wearing comfort, and so on, and advanced natural leather can be comparable. In addition, the ultra-fine fiber synthetic leather in chemical resistance, quality uniformity, large production and processing adaptability and waterproof, mildew degeneration, etc. more than natural leather. Practice has proved that the excellent performance of synthetic leather is a natural leather can not be replaced, from the domestic and international market analysis, synthetic leather has also been a large number of natural leather to replace the lack of resources. The use of artificial leather and synthetic leather bags, clothing, shoes, vehicles and furniture decoration, has been increasingly affirmed by the market, its wide range of applications, the large number of varieties, is the traditional natural leather can not be met. PU leather and leather PU leather and leather bags have their own characteristics: PU bag looks beautiful, good care, wear; leather take care of trouble, wear, but it is leather. PU leather products maintenance methods Method of Cleaning: 1. Dip the water and detergent, avoid gasoline scrub 2. Can not dry-clean 3. Can only be washed, and washing temperature can not exceed 40 degrees 4. Do not use sun exposure 5. Do not touch some organic solvents 6.PU leather jackets need to hang bag collection, not folding equipment Characteristics of PU and Artificial Leather: 1. High strength, thin and flexible, soft and smooth, breathable and water-permeable, and waterproof 2. Low temperature still has good tensile strength and bending disturbance strength, good light resistance to aging and hydrolysis stability 3. Not wear-resistant, appearance and performance are close to natural leather, easy to clean decontamination, easy sewing 4. Smooth surface, can be a variety of surface treatment and dyeing, species diversity

PVC is the uppermost layer of paint, the main component of the middle is PVC, the lower is the back coating binder. PU synthetic leather commonly known, the proportion of light. PU lines are paper pattern, the PU slurry is coated on the textured release paper, the release paper and then cooling setting, which will remain on the paper grain PU layer of a process. PU can also be processed embossed, there are two wet and dry production process from speaking. Easy to distinguish between the two. Wet generally thicker, because there is a layer of BASE (low foamed layer) between the surface layer and the backing, but the law does not dry BASE, directly applied to the cloth at the end, it is more book, lines deformation. Wider use of wet PU, luggage, handbags, shoes, balls, stationery, sofa, etc. are used more, and dry rule is mainly used in packaging and clothing. the method of Identification: 1, PU feel softer than PVC, good quality, good toughness, generally used to make fabrics that can withstand relatively large tension; 2, PU expensive than the price of PVC; 3, PVC can be hard to tear, and the PU can not; 4, PVC base fabric is generally relatively thin, relatively thin; PVC more are water bottom clothing and Han Yi cloth bottom, and the bottom fabric of high quality PU; PVC leather substrate is typically a woven fabric and knitted fabrics, PU leather substrate is a nonwoven fabric; 5, if the fire, PU taste is lighter, PVC will be black, bad taste. 6, PVC is greater than the proportion of PU. 7, PVC lines deep, intermediate foam layer more obvious. PU lines from points, including a mirror PU, sheep grain PU, NappaPU, color PU, soft PU wood, metal PU, PU lines Helen, embossed PU, pigskin grain PU, R61 grain PU, PU crocodile, fish scale pattern PU , soft lines and the like. PU mirror surface is characterized by bright, wrinkled PU mirror, crystal mirror PU, PU film mirror and the like. Nappa, Helen (KMF), metal, R61 these types of PU lines is quite similar to the naked eye to see very fine can tell, the main difference is the pattern of lines. Color PU surface and the bottom fabric are the same color. R61 lines look carefully, there are some Xiaodong; Yang Xiaodong Dong pattern is continuous; Nappa lines have more rules, more obvious; the rest is KMF Helen pattern, texture relatively no fixed rules; soft grain PU the lines are very shallow light. There is also a stretch PU, elastic obvious. Semi PU surface is PU, the base fabric is PVC, actually belongs to PVC, can be torn by hand, SemiPU, also known as imitation PU.

Now the material of many exquisite fashion bags is PU leather, Especially in autumn and winter, PU bag with autumn and winter clothing is most pronounced texture. Below this point introduce nursing experience this type of bag PU bags and leather bags have their own characteristics PU bag looks beautiful, good care, lower prices, but do not wear, easy to break; Leather is expensive, take care of the trouble, but durable. the Maintenance lof eather 1. The above water and detergent cleaning, avoid gasoline scrub 2. Do not dry 3. The only water and washing temperature should not exceed 40 degrees 4. Can not use sun exposure 5. Can not contact with some organic solvents 6.PU leather coat needs to mount bagged collection, not off loaded the features of PU and artificial leather: 1. High strength, thin, flexible, soft, smooth, breathable good water permeability, and waterproof 2. Under low temperature still has good tensile strength and song disturbance intensity, better light aging resistance and hydrolytic stability 3. Flexibility wear, appearance and performance are close to natural leather, easy to wash decontamination, easy sewing 4. smooth surface closely, it can be a variety of surface treatment and dyeing, species diversity cleaning method of PU bag: 1. The above water and detergent cleaning, avoid gasoline scrub Recommended to buy the kind of lemon maintenance wax (wax spray sofa kind of maintenance to be). Spray a little on the felt (general wipe wipe glasses lens cloth is cheap and easy to use is a good helper}, then rub in PU the skin on (all wipe evenly) and then dry it in a ventilated place, so there will be neither odor .. but also to maintain PU leather luster oh. 2. Do not dry Because PU leather dry cleaning soiled with oil and then the high temperature will be deformed. You do not want his beloved stuff wash away form it! 3. Only wash And water temperature should not exceed 40 degrees. Avoid dust, humidity and dirt, if you get wet or stained water, to quickly use a towel or clean cloth to wipe off the water, then placed in ventilated place to dry, in order to avoid mildew. The general dust, then with a dry cotton cloth dry, if dirt, wipe with a soft cloth dipped in protein stain, the stain can be removed annoying, avoid cleaning with a brush, causing the surface of the solid color paint is washed off . 4. Can not use sun exposure Regardless of any kind of material package, after cleaning should be placed in ventilated place to dry, do not take it to be done quickly in the sun, because after bags of water after scrubbing, it is the most vulnerable time, sudden high temperature irradiation It can cause discoloration or leather bag hard, brittle. 5. Can not contact with some organic solvents. 6.PU leather coat needs to mount bagged collection, not off loaded. How to remove the PU bag odor to the drugstore to buy a bag of talcum powder, talcum powder wrapped with gauze, put the bag in 12 hours, there is no taste, this method can also get rid of shoe odor. pu bag how to take care of Dirty would be best to buy a bottle of Fengyoujing smear effect just fine, will not turn yellow after wiping, and clean, if the area is large, then, is to use the wind spirits a bit more. Usually can hold a bottle in the bag, ready to wipe dirty, do not wait until the whole dirty again rub

PVC bags PVC (Polyvinylchloride, PVC) full name Polyvinylchlorid, the main ingredients of PVC, bright color, corrosion-resistant and durable, due to the increased plasticizer, anti-aging agent of some toxic auxiliary materials during the manufacturing process to enhance its heat resistance, toughness, ductility, so the products are generally not store food and medicine. It is a popular favorite in today's world, is quite popular and also widely used as a synthetic material. It ranks second in the global use of a variety of synthetic materials. According to statistics, only one year in 1995, PVC production capacity in Europe, there are about five million tons, while its consumption was 5.3 million tons. In Germany, PVC production and consumption by an average of 1.4 million tons. PVC is the 4% growth rate to obtain production and application worldwide. In recent years, growth in the number of PVC in Southeast Asia is particularly significant, thanks to the Southeast Asian countries have carried out urgent infrastructure needs. In the three-dimensional surface film can produce the material, PVC is the most suitable material. PVC (polyvinyl chloride), which is simple in structure type monomer is CH2 = CHCl Chemical and physical properties: Rigid PVC is one of the most widely used plastic materials. PVC is actually a vinyl polymeric material, the material is a non-crystalline material. PVC material in actual use, often by adding stabilizers, lubricants, auxiliary processing agents, pigments, impact agents and other additives. Not easily flammable, high strength, resistance to climate variability and excellent geometric stability. PVC oxidant, reductant and acid has a very strong resistance. However, it can be concentrated oxidizing acids such as concentrated sulfuric acid, concentrated nitric acid corrosion and does not apply to contact with aromatic hydrocarbons, chlorinated hydrocarbons occasions. PVC melting temperature in the processing is a very important process parameters, if this parameter incorrectly will cause the material to decompose problems. Very poor flow characteristics of PVC, very narrow scope of the process. Especially high molecular weight PVC material more difficult to process (this material is usually added to improve the flow characteristics lubricant), it is often used are low molecular weight PVC material. PVC contraction rate is very low, typically 0.2 to 0.6%. PVC can be divided into soft PVC and rigid PVC. Rigid PVC market which accounts for about two-thirds of soft PVC 1/3. Soft PVC are generally used for surface floors, ceilings and leather, but because of soft PVC containing softener (which is soft PVC and rigid PVC distinction), easy to become brittle and difficult to preserve, so its use has been limited. Hard PVC free softener, so good flexibility, easy molding, hard brittle, non-toxic and pollution-free, save for a long time, so it has great development and application value. Below are referred to PVC. Soft PVC used to make multi-vacuum film for packaging various types of panel surface, it is also known as decorative film, with film, used in building materials, packaging, pharmaceutical and many other industries. Building materials industry accounted for the largest proportion, 60%, followed by industry, packaging industry, there are a number of other small-scale applications. PVC characteristics and molding characteristics Specific gravity: 1.38 g / cc, mold shrinkage: 0.6-1.5% molding temperature: 160-190 ℃. Features: mechanical properties, excellent electrical properties, strong acid strength, chemical stability, but low softening point suitable for the production of sheet metal, wire and cable insulation, seals and so on. Development of China's PVC market In recent years, China polyvinyl chloride (PVC) at an alarming rate, new and expansion projects have been started, the rapid expansion of production capacity, a substantial increase in yield. 1997-2006, China's PVC production capacity, yield an average annual growth rate as high as 22.2% and 20.0%. I. Introduction PVC PVC is a non-toxic, odorless white powder. Its high chemical stability, having good plasticity. Apart from a few organic solvents, at room temperature can be resistant to any concentration of hydrochloric acid, sulfuric acid 90% or less, 50 to 60% nitric acid and caustic soda 20%, for salt is also very stable; the thermal stability of PVC and relatively light resistance poor, it can begin to decompose above 140 ℃ and release hydrogen chloride (HCl) gas, resulting PVC discoloration. PVC electrical insulation excellent, generally will not burn in the flame can burn and emit HCl, but leave flame that is self-extinguishing, is a "self-extinguishing", "flame retardant" material. Based on these characteristics, PVC is mainly used for the production of profiles, field profiles, pipe fittings, plates, sheets, cable sheathing, hard or soft tubes, blood transfusion equipment and films. Material classification PVC bag material quality can be divided into four categories: ordinary PVC, ultra-transparent PVC, green PVC, colored PVC, of course, price is not fixed. Would feel concerned can be divided into soft PVC and rigid PVC two kinds. Applications PVC bag widely used as stationery bags, cosmetic bags, garment bags, metal bags, jewelry bags and other packaging products. Many high-end manufacturers would prefer to use PVC bags for packaging, PVC transparent, beautiful, improve product quality. production methods the methods of production and processing of PVC bag are usually high-frequency pressing or car line sewing. After the high-frequency pressing PVC bags, PVC film roll by cutting cut into pieces, we need to silk screen printing (PVC ships mostly silk screen printing), and then use high-frequency hot pressing machine, which normally takes custom mold produce. Hot PVC bags can be pressed into the PVC sleeve bags, PVC embedded line bags, PVC toothless zipper bags, PVC bag, PVC ziplock and other styles. Under sewn PVC bags of material After printing, direct sewing flat car or trucks and other car line sewing machines from the general meeting of nylon zipper and other accessories.

For the love of running outdoors people, almost nothing is more important than to have a comfortable and beautiful and practical special Sport Backpack Bag. Whether you are a whitewater adventure, field trips, wilderness photography, stream fishing, mountain tour ...... Outdoor backpack features 1, the material used in the backpack after water treatment, but also very wearable. 2, the backpack back the bandwidth and thick, and has shared the backpack weight belt. 3, supporting a large backpack has an aluminum frame or the outer frame of aluminum inclusions, small backpack back support has a hard sponge or plastic plate enclaves. 4, backpacks often stated on the label uses, such as "MADE FOR ADVENTURE" (designed for the adventure), "OUTDOOR PRODUCTS" (outdoor special products) and the like. Category outdoor sports backpack 1, mountaineering bags. Two types: one is a large volume of 50 - 80 liters backpack between; the other is a small volume between 20--35 liter backpack, also known as the "surprise package." Great package is mainly used mountaineering mountaineering mountaineering transported materials, small packages are generally used for high altitude mountaineering or climbing the summit assault. Mountaineering backpack is dedicated to cope with extreme environments, production of sophisticated and unique, usually slender body bag, back pack according to the body's natural curve design, the inclusion of people close to the back, to relieve the pressure on the shoulders of the strap. Such packages have been waterproofing, even in the rain does not leak. In addition, except for mountaineering bags mountaineering in other adventure sports (such as rafting, across the desert, etc.) and long-distance travel is also widely used. 2, traveling bags. Big bag mountaineering bags and packages are similar but different shape, front bag by the zipper fully open, very beneficial thing to take place, as usual is not climbing package from the package will cover the top of the article into the bag. Small bag variety, be sure to choose a comfortable carrying, not only pay attention to appearance. 3, bike bag. Bag and backpack type divided into two categories. Bag carrying either type can also be hung on the package before or after the bicycle rack. Backpack is mainly used for high speed riding bicycle travel needs. All with reflective light reflective bicycle package to ensure safety when riding at night. Category backpack Depending on the application, it can be divided into outdoor sports bag backpack mountaineering, long-distance travel bag, backpack and bike back shelf bag four categories. Special mountaineering backpack is designed specifically for mountaineering, general packet slender body, the upper and lower bunk, a support package to an aluminum frame package, the whole article by the package into the top cover, the package also sets ice ax, ice ax for bundling , ski pole use. Mountaineering bag strap mostly "S" shape, strap thick and wide, back up and very comfortable, and with on-load backpack weight lifting belt can be adjusted. Long-distance travel bag is generally rectangular, their straps and belts and mountaineering bags approximation, and very comfortable, and the front of the package can all be opened, to take things very convenient, and some have side pockets can hold items. Bicycle backpack is designed for cycling tourism and design, divided into Bag backpack two. Bag style Several packages were hanging in front of the car and the rear frame; if she had to leave bicycles, optional backpack. Back pack frame is made of lightweight aluminum, particularly suitable for amplification type items such as tents, photography boxes. Size backpack The need to choose their own backpack after species, but also consider the volume of the backpack. If you go to the outskirts of photography backpack that you can not be less than 60 liters, because in addition to the daily necessary supplies, you have to have a set of photographic equipment; if it is to go hiking, then the best choice of more than 50 liters backpack, because the backpack also installed under tents and sleeping bags; if go away on business, a 35-liters backpack had enough, carry clothing and everyday objects can be installed under. Outings generally choose backpack about 35 liters, while in the city, a 15 liters to 20 liters backpack is enough. In short, according to how much you want to buy a backpack with what may be. Backpack material Many types of materials the backpack, which directly affects the price of the backpack that better materials, backpacks and more expensive. Backpack materials in general are mainly: 420D Oxford Nylon, 1000D nylon or 10000KODRA, 600D polypropylene and other materials. 1000D material wear, if the field is to use, choose this material. In recent years, there has been a foreign Fangsi fabric, with the fabric of the backpack, once torn, the break will not be torn to expand, it is suitable for outdoor activities, travelers.

Shopping bags, plastic bags, paper bags, or bags? When every time we go to the supermarket shopping, maybe we would ask such a question. Since the "plastic limit order" issued, a lot of businesses in order to circumvent the law, take the initiative to use paper bags or bags, or paid to provide plastic bags. Many people feel, to bring their own shopping bags to the supermarket some trouble, some people even in the heart secretly thinking, anyway, only a few cents for each plastic bag, not bad money. However, no one think of this little thing, a huge impact on the environment. Bags: environmental public enemy number one Because of cheaper production costs of plastic bags, grocery United States usually choose them. According to statistics, only in California, consumers of plastic bags used per year to more than 19 million, so many plastic bags need to produce 800 million barrels of oil. In addition, the United States about 90% of plastic bags are not recycled. Before the "plastic limit", the domestic supermarket bags and businesses are also regarded as the first choice. Globally, there are about 500 million disposable plastic bags were thrown in the wild or are blown away or become a marine trash vortex, and finally eating wildlife and marine animals mouth, resulting in many deaths of innocent animals. Many scientists and environmental conscience consumers, the bags considered the number one public enemy. Why small plastic bags will become the number one enemy of the environment it? Scientists pointed out that in the natural environment, biodegradable plastic bags is not possible only by light degradation. The sun's ultraviolet plastic polymer chains will be broken down into many small pieces of hydrocarbons. These small pieces of hydrocarbons usually weighs 0.15 grams. "Plastic: Toxic Love Story" author Susan book takes a very vivid metaphor to explain this process: plastic like a string of pearls, hydrocarbons like string together the pearls, pearl polymer chain is to string together a line. In light degradation in the UV line consists of polymer chains to destroy the hydrocarbons naturally separated. But, nevertheless, this process is very slow. The usual treatment is landfill discarded plastic bags. High density polyethylene plastic bags buried underground after hundreds of years are not decompose. In the United States coastal areas, plastic bags are one of the most common of the 10 kinds of garbage. For this reason, it has become popular around the world are "plastic limit." San Francisco is limiting consumer use of plastic bags. Since last April, the city's only allowed to use biodegradable plastic bags or renewable paper bag. Biodegradable plastic bags break down in a few months rather than a few hundred years. In China, as early as four years ago, we began the implementation of the "plastic limit" in order to reduce the use of plastics, reduce the damage caused to the environment. Paper: Environmental invisible killer Since the enactment of the "plastic limit", many businesses take the initiative to provide a paper bag. Some global brands even still on paper a big fuss, to attract the attention of consumers. As we all know, is a paper recycling recyclable. The main raw material for papermaking plant fiber raw materials, in addition to containing cellulose, hemicellulose, lignin three main components, there are other smaller content components, such as resin, ash. In addition to sodium sulfate accessory ingredients. The paper also need to add a different packing according to different paper stocks. Bag of raw material is trees, is a renewable resource. Inherently biodegradable, recyclable natural features labeled green label. However, the paper is not really sound it? actually not. According to environmental experts, the paper raw material is wood, but, for the production of shopping bags Americans use each year, manufacturers need at least 14 million trees depleted. Light paper production, has been the global environment caused irreparable damage. In addition, immature papermaking technology, so that a large amount of waste gas in the production process, if the processing equipment behind can lead to incomplete treatment or discharge of untreated, can still pollute the environment. According to statistics, compared with the production of plastic bags, paper bag production can bring 70% more air pollutants and 50 times more water pollutants. And this data, just get out of the situation according to the United Kingdom. For the United States, China, and its vast number of countries, the data will be much larger. In terms of waste disposal, 2000 plastic bags weighing about 30 pounds 2000 paper bag weighs about 280 lbs, disused paper bags will occupy a larger landfill space. Despite the adoption of high technology, paper recycling rate can reach 100%, but recycling paper bag 1 lbs energy required to recycle than plastic bags 1 lbs 91% more than the energy required; the energy produced in a paper bag , the production of more than four times the energy of a plastic bag. Non-woven bags: Additives Natural hazards

For people who love to run outdoors, almost nothing is more important than to have a comfortable and beautiful and practical special backpack. Whether you are a whitewater adventure, field trips, wilderness photography, stream fishing, mountain tour ...... features of outdoor Backpack Bag 1, the material used in the backpack after water treatment, but also very wearable. 2, the backpack back the bandwidth and thick, and has shared the backpack weight belt. 3, supporting a large backpack has an aluminum frame or the outer frame of aluminum inclusions, small backpack back support has a hard sponge or plastic plate enclaves. 4, backpacks often stated on the label uses, such as "MADE FOR ADVENTURE" (designed for the adventure), "OUTDOOR PRODUCTS" (outdoor special products) and the like. Category of outdoor Backpack Bag 1, mountaineering bags. Two types: one is a large volume of 50 - 80 liters backpack between; the other is a small volume between 20--35 liter backpack, also known as the "surprise package." Great package is mainly used mountaineering mountaineering mountaineering transported materials, small packages are generally used for high altitude mountaineering or climbing the summit assault. Mountaineering backpack is dedicated to cope with extreme environments, production of sophisticated and unique, usually slender body bag, back pack according to the body's natural curve design, the inclusion of people close to the back, to relieve the pressure on the shoulders of the strap. Such packages have been waterproofing, even in the rain does not leak. In addition, except for mountaineering bags mountaineering in other adventure sports (such as rafting, across the desert, etc.) and long-distance travel is also widely used. 2, traveling bags. Big bag mountaineering bags and packages are similar but different shape, front bag by the zipper fully open, very beneficial thing to take place, as usual is not climbing package from the package will cover the top of the article into the bag. Small bag variety, be sure to choose a comfortable carrying, not only pay attention to appearance. 3, bike bag. Bag and backpack type divided into two categories. Bag carrying either type can also be hung on the package before or after the bicycle rack. Backpack is mainly used for high speed riding bicycle travel needs. All with reflective light reflective bicycle package to ensure safety when riding at night. 4, back frame package. Such package by the package body and external aluminum shelf components. For carrying bulky and difficult to load backpack items, such as photography boxes, gas tanks and the like. In addition, many backpacks on the plate for what is often stated in the motion, what is good travel backpack Many tourists choose to pay little attention to the package, ready to carry a poop bag and left, in fact, have a comfortable and beautiful and durable backpack is very important. Backpack type on the market today, the brand, variety, the majority of tourists should choose? the Category of Backpack Bag Depending on the application, it can be divided into Sport Backpack Bag mountaineering, long-distance travel bag, backpack and bike back shelf bag four categories. Special mountaineering backpack is designed specifically for mountaineering, general packet slender body, the upper and lower bunk, a support package to an aluminum frame package, the whole article by the package into the top cover, the package also sets ice ax, ice ax for bundling , ski pole use. Mountaineering bag strap mostly "S" shape, strap thick and wide, back up and very comfortable, and with on-load backpack weight lifting belt can be adjusted. Long-distance travel bag is generally rectangular, their straps and belts and mountaineering bags approximation, and very comfortable, and the front of the package can all be opened, to take things very convenient, and some have side pockets can hold items. Bicycle backpack is designed for cycling tourism and design, divided into Bag backpack two. Bag style Several packages were hanging in front of the car and the rear frame; if she had to leave bicycles, optional backpack. Back pack frame is made of lightweight aluminum, particularly suitable for amplification type items such as tents, photography boxes. the Size of Backpack Bag The need to choose their own backpack after species, but also consider the volume of the backpack. If you go to the outskirts of photography backpack that you can not be less than 60 liters, because in addition to the daily necessary supplies, you have to have a set of photographic equipment; if it is to go hiking, then the best choice of more than 50 liters backpack, because the backpack also installed under tents and sleeping bags; if go away on business, a 35-liters backpack had enough, carry clothing and everyday objects can be installed under. Outings generally choose backpack about 35 liters, while in the city, a 15 liters to 20 liters backpack is enough. In short, according to how much you want to buy a backpack with what may be. the material of Backpack Bag Many types of materials the backpack, which directly affects the price of the backpack that better materials, backpacks and more expensive. Backpack materials in general are mainly: 420D Oxford Nylon, 1000D nylon or 10000KODRA, 600D polypropylene and other materials. 1000D material wear, if the field is to use, choose this material. In recent years, there has been a foreign Fangsi fabric, with the fabric of the backpack, once torn, the break will not be torn to expand, it is suitable for outdoor activities, travelers.

Bags called travel packages, by definition refers to travel or tourism prepared for a class package. When is leaving home to travel, or work or tour, or join in the nature enjoying the sun and rain, can be daily necessities or want anything close at hand loaded up for a class in portable package. Bags can be divided into backpacks, bags and haul packages. When choosing, consider the volume and style, users should also consider the size and shape as well as weight-bearing capacity and other factors. species Bags can be divided into backpacks, bags and haul packages. The bag types and uses very detailed, not a few hundred words can be said clearly, as far as the top of outdoor specialty stores expert Lexus presentation, traveling bags mountaineering bags and sub-city tour or daily excursions bags, these bags function and purpose are not the same. Mountaineering package is divided into large bags, big bag outer shelf and rack within two kinds there, since the outer shelf is very inconvenient to travel in the mountains, within the general recommended shelf bag. In five days to Sichuan Siguniang Mountain hiking, for example, recommends that men with 70 liter -80 liter bags, ladies bags 40 liters -50 liters. The best bag with a detachable lid pocket or purse, after arriving at the camp can be a common thing in staged or fanny pack, the big bag to stay in the camp, without reservation. use Depending on the volume of the bag, the bag can be generally divided into medium and small three categories. Large bag volume of 50 liters, suitable for long distance travel and more professional adventure. For example, when you go to places like Tibet or climbing expeditions for long-distance travel, you should definitely choose a volume of 50 liters or more large bags. Some short-term needs of large bags when you travel if you need camping, because it can only be installed under a tent, sleeping bags and camping sleeping pad you want. Large bags according to different uses can be divided into long-distance hiking bag and travel bag. Mountaineering bags typically comprise slender body, so that through the narrow terrain, the package body is divided into upper and lower levels in the middle with a zipper sandwich apart, so that when the pick and place items very convenient. Sides and top of the bag can be tied outside the tents and mattresses, potentially increasing the volume of the bag. There are sets of outside bag ice ax, ice ax for binding, ski pole purposes. Most noteworthy is that the back of the structure of these bags, there is support inclusion of lightweight aluminum inner frame within the pack, according to the shape of the back is ergonomically designed, and the bandwidth of the back and thick, used in line with human physiological curve shape the "S" design, and there are two sides to prevent the strap sliding chest strap, so that those who feel very comfortable bag. And all of these bags have a strong, generous and comfortable belt, strap height can be adjusted. Users can easily adjust the strap to suit their height according to their body. Generally speaking, to the bottom of the bag is located above the buttocks, so they can be more than half the weight of the bag is transferred to the waist, thus greatly reducing the burden on the shoulder, the shoulder due to long-term weight reduction caused by the damage. Similar long-distance travel bag package structure and mountaineering bags, just some large body bag, and with many pockets to piece classify objects placed before the face of long-distance travel bag usually can be opened, taking items out of convenience . Medium bag volume is generally between 30 to 50 liters, more extensive use of these bags, backpacking 2 to 4 days of field trips, travel between cities, and some long-haul non-camping, is a medium-sized bag appropriate. Some clothing and daily necessities can carry with them pretend to be under. Medium bag style and more diverse species. Some bag added some side pockets, and more conducive to repackage items. Back structure of these bags and large bags roughly the same. Small bag volume of 30 liters, these bags are generally used mostly in the cities, of course, for 1 to 2 days outing is also very appropriate. Bag capacity Bags including purses, backpacks and dragging the bag (trolley bags). Pockets of capacity is generally small, often have a capacity of 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L and the like. A relatively large volume of the pack, the capacity of commonly 20L, 25L, 30L, 35L, 40L, 45L, 50L, 55L, 60L, 65L, 70L, 75L, 80L, 85L, 90L, 95L, 100L. Drag bag (trolley bag) and the capacity of the basic capacity to distinguish between similar travel bag. Bag selection Travel bags, should individual needs appropriate specifications, fabric products based. Most hard case with a high temperature, wear-resistant, impact resistant, waterproof, compression characteristics of its hard shell material to protect the contents from extrusion and impact, but the drawback is built fixed capacity. The soft case can be more user-friendly use of space, and most light weight, toughness, attractive appearance, more suitable for short trips. Travel bags easily damaged when using the trolley, take the wheel and carrying handle, should focus on checking these sites. After standard when consumers can choose the length of the lever is pulled to the need to stoop to repeated dozens of times telescopic rod, the rod still pull together a smooth, positive lock lever sing off basis to test the quality rod. When viewing box to go round, you can box upside down, wheels off the ground, his hand struck the wheels to spin, wheel rotation to be flexible, with the wheel and axle is not tight or too loose, the box should be selected to go round rubber material, noise and wear. It handles mostly plastic, generally of good quality plastics has a certain toughness, poor quality plastic hard, brittle and prone to breakage during use. When choosing travel soft case, we must first pay attention to the zipper is smooth, with or without tooth loss, dislocation, suture stitch is flat, off the assembly line should be consistent, no empty needle, needle jumping, generally box corner, turning the place easy to have to jump line. Second is to see box, box face whether the disabled (such as fabric breaking through the weft, jump wire, split horses, etc.), rod, walking wheel, lock boxes and other accessories inspection scheme and select travel suitcase same way. Choose well-known businesses and brands. Generally good quality travel bags, pay more attention to detail, suitable colors, stitching neat, uniform stitch length, no thread exposed, fabric smooth flawless, no bubbling, no exposed edges, bright metal parts. Choose well-known businesses and brands have a good after-sale protection. Look at the label logo. Regular manufacturers of products should be labeled with name, product standard number, model specifications, materials, production unit name and address, identify the test, contact telephone.