Common Knowledge Of Bags And Materials

　　 1. what are the common materials of luggage and bags?

Answer: for manufacturing. Luggage and bags There are many kinds of materials. Leatherwear Package (including top skin, two layers leather, film transfer leather), synthetic leather / synthetic leather (PU, PVC), fabric bag (including canvas, cowboy, Oxford, polyester, nylon, down cloth, etc.), plastic bag (including ABS, PVC, commonly used in travel box) and straw woven bag.

　　 2. what kind of bag is a real leather bag?

Answer: the real leather bag mainly refers to 90% of the wrapped materials, which are made of leather.

3. what are the common types of genuine leather bags?

Answer: Genuine leather According to animal species, bags are mainly divided into sheep skin, pig skin, cowhide, horse skin, etc. * and a small amount of ostrich skin, crocodile skin, pearl fish skin, snake skin, etc. The sheepskin is divided into sheepskin and goat skin, and the cattle hide is mainly divided into yellow cattle skin and buffalo skin.

　　 4. how to distinguish head skin, two layer leather and artificial leather

Answer: the skin of the first layer is made directly from the raw skins of various animals, or processed by the upper part of the animal skins made of cattle, pigs and horses with thicker cortex. The surface texture is plump and elastic, and the handle is smooth and thick. The dermal fiber tissue of the hairs can be seen on the back. The two layer skin is made of two layers of loose skins of cattle skin and fiber, such as cattle, pigs, horses, etc., which are processed by chemical materials or coated with PVC and PU films. It can be seen from the cross section that there are obvious artificial materials on the surface of loose fibrous tissues. The surface texture is relatively average, with no head skin and full hand feel. The dermal fiber tissue can still be seen on the back. Artificial leather has always been used as a substitute for leather fabrics, and artificial materials can be clearly seen from the cross section and back. When some artificial leather is pushed upward, the surface patterns and pores will fade or even disappear, and the traces of printed nets can be seen.

　　 5. what is the PU package? What are the differences between it and PVC?

A: in China, PU and PVC are also known as synthetic leather / synthetic leather, all of which are polyvinyl chloride, but the two processes are different.

Thickness: the manufacturing process of PU is better. Under normal circumstances, the bottom of PU is thicker than that of PVC.

Hand feeling: PU feels soft and PVC feels hard. PVC will harden at lower temperature, and PU will not.

Performance: compared with PVC, PU is more flexible, more resistant to twists and turns, and has a large tensile resistance and permeability.

Legend:

　　 6. misunderstanding: "leather" is genuine leather, leather is synthetic or other synthetic materials.

Answer: actually, "leather" refers to raw materials without tanning, which do not have long-term storage function. Tanning and long term storage function are called "leather", so the finished products should be "leather" more accurately, such as "cow leather" and "sheepskin two layers of leather".

There are many kinds of materials for making bags. Common bags are mainly leather bags, synthetic leather, synthetic leather, fabric bags, plastic bags and straw woven bags.

　　 Cowhide

　　 According to varieties:

Yellow cattle skin:

Yellow cattle (including yellow, brown, black, variegated and other hair color), including bulls, cows and cows, have close knitted fibers, small parts, and high utilization rate. They are made of leather with detailed, plump and elastic properties, and are suitable for making all kinds of leather.

Buffalo skin:

Buffalo skins are characterized by sparse hair, coarse grain, larger yellow skin and heavier skins, but less woven and less elastic.

Yak skin:

Yak hair is long and thick, with less fat, and fiber is looser than yellow hide, but it is more compact than buffalo skin.

　　 According to the process,

Waxy skin:

It is grinding on the skin, smoothing all the defects and impatience on the silver surface, then dyeing and polishing. Because grinding and shaving are more serious, the surface of the skin is not visible.

Napa cowhide:

The biggest difference from other skin types is the "penetrating dye" technology, that is, the penetration rate of dyes. Many cowhide stains only stain the surface, while the Napa hide is soaked in dyeing, and its color penetrates the bottom.

Wax leather:

Leather is soft and willful. It is the first choice for many women's handbags. Because during the tanning process, the original oil content of the leather is preserved, the more beautiful the leather will be, the higher the gloss will be.

　　 According to the surface state:

Grain cowhide:

About 2-3 years old adult cattle are used as raw materials. The whole grain belongs to a branch of the Striped cattle skin. During the tanning process, he used the technology of "tumbling and throwing". The gloss on the gloss was shiny, and the pores of the hide were clearly visible.

Half grain cattle hide:

About 3-5 years old adult cattle are used as raw materials. The art is the same as the whole grain, but it has shorter throwing time than the whole grain. Pattern, molding, relative softness, saturation and wear resistance did not reach the full grain effect.

Natural buffalo skin:

About 2 years old cattle are used as raw materials. Natural fall is the category of high-grade leather, the highest hardness in granular leather, the texture of the surface is abnormal and some grains are small. The surface is not trimming and keeps the original bruise of the cowhide. It is a rare good leather material.

Lychee stripe cowhide:

Using the template with lychee grain, through high temperature, pressing and other special processes, the pattern and cowhide are combined into one. The cowhide is strong and tough, but it does not lack comfort. It looks more beautiful. It is a very good quality cowhide.

Pressed skin:

4-5 years of adult cattle are used as raw materials. The advantage is that it can make any pattern, change all kinds of colors, and not be restricted by the bottom embryo of the cowhide itself. The disadvantage is that there is a layer of pattern paper on the surface, so the wear-resistant type is lower than the ordinary cowhide product.

Die cast striped cowhide:

Adult cattle are used as raw materials. This kind of hide is defined as "the first layer of leather", but its grade is not correct. Because of its high surface defect rate, it has been sprayed with heavy shaving. Using white clean toilet paper to wipe the surface vigorously, the color will fall off.

　　 Sheepskin

Washed sheep skin:

Water washed sheep skin must be a process of goat skin embryos, because goat skin is stronger and stronger than sheep skin. The washing process is very complicated. Three dyes, three washes, three rubbing and three throwing will bring leather feeling and wrinkles. It is a very good leather material.

Wax changes to water.

This is not an ordinary goat skin. Its color is not painted but environmentally friendly. It does not damage the natural texture of leather. In the process of use, the effect of wax change will gradually appear, become more transparent, and the effect of color becomes more and more natural.

Little sheep skin:

The mixture of goats and sheep keeps the sheep's skin delicate, soft, slippery and comfortable, and is more durable and durable than ordinary sheepskin.

　　 Other skin types

Pigskin:

The pattern shows a "small triangle" cluster, which is the best place to identify pig skin. The skin of the pigskin is very thin, soft, and has good air permeability. shoes The inner side is a very intimate leather material.

Ostrich skin:

Ostrich skin is the most wearable, thickest and softest feature of leather, and has been popular all the time. There are small holes in the middle of the protuberance. Real ostrich bags are very durable and are synonymous with luxury.

Snake skin:

Surface patterns, edges and corners, "calcification" traces, touch with fingers, a bit hard and hard feeling. Snake skin is very thin and brittle, and its advantage is in wear resistance, because the surface of the snake skin is calcified, so there is no scars on the table and the friction at the plane angle.

　　 Artificial leather / synthetic leather

PU synthetic leather:

PU synthetic leather is a synthetic material that uses polyamine resin as coating material and fabric as the base to simulate dermal tissue structure. With the change of process, it is also made into various grades. P U leather has beautiful appearance, good handle and low price.

PVC artificial leather:

PVC leather is knitted. cloth The product made of PVC resin film on the base is characterized by bright color, corrosion resistance and durability. The disadvantage is that some plasticizers, anti-aging agents and other toxic auxiliary materials are added in the manufacturing process.

　　 Fabric type

PD fabric:

This fabric is of high molding, dirt resistance and fuzz. It is superior to canvas in general. So it has been widely used. Because there is no glue on the back of the fabric, it has a relatively general waterproof performance.

Waterproof canvas:

Natural fiber handbags, with the use of fabric surface will be fuzz, the sun has a lot of ultraviolet radiation, will decolorization. In order to make the fabric colorful, to maintain its durability, and has a good waterproof function.

Nylon:

Nylon is the first synthetic fiber in the world. It is elastic, wearable and easy to clean. Due to the high density of fabric and slight waterproofing effect, the material of the fabric is dyed by active environmental protection material and then fixed at the later stage.

Down:

Down cloth is a thin fabric with smaller linear density and larger density. Down cloth is usually woven with plain weave, and its fabric is more compact than ordinary fabric. Compact structure, smooth and clean, smooth handle, glossy, breathable, waterproof, fast and durable.

　　 Plastics

ABS:

ABS is a general thermoplastic project developed in the 40s of this century. Plastic It is a plastic with excellent mechanical properties. It has not only good rigidity, hardness and processing fluidity, but also high toughness. It can be molded, extruded or thermoforming. Its impact resistance, heat resistance, low temperature resistance, chemical resistance and excellent electrical properties, good surface gloss, widely used in the production of high-end computer bags or backpacks and high-end rod boxes, suitcases.

PC:

Polycarbonate is an abbreviation for engineering plastics. It is an amorphous thermoplastic resin with excellent comprehensive properties. It has excellent electrical insulation, elongation, dimensional stability and high chemical resistance, high strength, heat resistance and cold resistance. It also has the advantages of self extinguishing, flame retardant, non-toxic, coloring and so on. The disadvantage is that it is resistant to strong acid, alkali resistant and UV resistant.