Luggage material refers to the material used for the outside and inside of the bag, and the material used for the bag is generally divided into main materials and accessories.
First, the quality of materials
<h1 class="pgc-h-arrow-right" data-track="3" > fabrics and linings:</h1>
Mostly used for the outer and inner materials of the bag. Surface: the fabric can not have a yarn, the stripes of the yarn should be clear and the color is consistent and uniform, the number of horizontal stripes of the yarn should be enough, the thickness should be enough, and the yarn should be straight (can be tested by the measuring instrument); the rubber bottom: the glue will not be degummed firmly, the rubber bottom will not be white (it will not be white after grasping by hand, and the original rubber base color will be maintained); The force: it will not crack after pulling hard with the horizontal and straight grain direction. Colored materials should also pay attention to whether there is a reinforcement color, especially for bright colors are more likely to produce dyeing phenomenon, color matching is not good enough to find everything is late!
<h1 class="pgc-h-arrow-right" data-track="6" > foam and sponge:</h1>
Mostly used between the cloth and the inner cloth of the bag, the good bag can not be seen. It mainly depends on whether the thick bottom and density are enough (whether one square has enough weight). Good cotton is elastic and not easy to pull apart.
<h1 class="pgc-h-arrow-right" data-track="8" > mesh:</h1>
It should be elastic, good force, not easy to pull off, and there is no broken yarn.
<h1 class="pgc-h-arrow-right" data-track="10" > webbing:</h1>
There are many types of webbing, such as plain weave, fine grain, pit grain, etc., but each different size of webbing has a standard weight. Outside to see whether the two edges are smooth, whether the surface is uniform, no hair, no yarn, no dyeing and other phenomena.
Zipper: The quality of the chain cloth and the sling head is mainly distinguished by the grade: such as A, B, C grade, the more forward the level of quality, the better. Specifications are distinguished by size numbers: such as size numbers such as No. 3, No. 5, No. 8, No. 10, etc. The larger the number of numbers, the larger the specifications. Each specification of the zipper has a standard weight, and weight is also the key to quality. Outside to see the main attention: when pulling to be smooth, there will be no feeling of pulling unsmooth, the sound is not very loud when pulling, the zipper teeth can be pulled by hand and are not easy to burst open, and the puller in addition to the big, small bottom, the pulling head and the pulling plate are not easy to pull apart, the pulling plate should be firm, not easy to pull, deformation and other phenomena, there is a color of the zipper at the same time to pay attention to whether there is a reinforcement chromaticity level. So as not to easily produce dyeing with the fabric will have serious consequences.
Second, cloth knowledge
The materials used for bags are generally divided into main materials and accessories, and the main materials can be divided into:
The composition of the cloth is: gluing
yarn:
Definition of the Danny number of yarn (fixed length):
Take a yarn 9000 meters long, if it weighs 70G, it is called 70D, 210G is called 210D, and so on, the higher the number of dennys, the thicker the yarn, and the thicker the cloth (usually used for long fiber yarn).
Definition of yarn count:
Take 1 pound of yarn, its length is several times the length of 840 yards, that is, called several yarns, if the length is 840 yards of 10 times long is called 10 yarns, if there is 840 yards of 20 times longer is called 20 yarns, and so on, the larger the number of yarns means that the yarn is thinner (usually used for staple yarn).
Types of yarn
A. According to the material:
1. Natural Fiber:
1) Plant fiber: cotton (COTTON) hemp (JUTE, LINEN, RAMIE)
2) Animal fiber: wool (WOOL) silk
2. Synthetic fiber:
Nylon (NYLON) Tetolone (polyester) (also known as TETRON) Acrylic (ACRYLIC) Polypropylene (PP) Polyethylene (PE)
3. Man-made fiber:
RAYON is also known as artificial cotton rayon (VISCOSE)
4. Blended fiber:
Long/staple fiber blended yarn, available in T/R T/C
B. By brightness: semi-gloss yarn / glossy yarn / triangular bright yarn
C. To process the points:
1. Raw wire (unprocessed): UDY (no extension) POY (semi-extended) FOY (fully extended)
2. Processing silk
3. Spinning
4. Wrapping yarn
D. The number of shares of the yarn is divided: single share, double share, multiple shares
Yarn material differentiation:
1. Cotton: burn immediately, flame stabilization, gradual extinguishing, raw white smoke, burnt smell, gray ash, SOFT.
2. Yan Ling: burn immediately, the flame is stable, immediately extinguished, raw white smoke, burnt smell, no ash, SOFT.
3. Nylon: first shrink curl melt, gradually burn, raw white smoke, like celery flavor, gray hard lumps, shiny.
4. Tedolong: first shrink curl melt, gradually burn, raw black smoke, odor, black hard lump, dull.
5. PE:: First shrink curl melt and then burn immediately, raw black smoke, paraffin flavor, yellow-brown hard block.
6. PP: melt first and then burn rapidly, the flame beats, raw black smoke, pungent smell, black irregular hard blocks.
Blank:
A. According to the weaving method (looms are different):
1. Knitted fabric: mesh mesh cloth plush sheared plush wear-resistant cloth KEVLA L LYCRA.
2. Flat Weave: Tafta Oxford CORDURA BALLISTIC.
3. Twill: 3/1 twill 2/2 twill Large oblique Cross jacquard Checkered cloth Sardine cloth
4. Jacquard cloth: color gauze plaid curtain cloth LOGO jacquard Bed sheets Tablecloth
5. Non-woven fabric: Lixin cloth needle ginning (pay attention to thickness / yard weight / grain / color)
Flat weave, twill, jacquard are all woven into their fabric structure by cross-crossing of warp and weft yarn. Depending on the material of the warp and weft yarn/ the number of threads and the weaving method, a variety of different specifications of cloth can be changed. Its specifications are expressed as follows:
420D (warp denis) * 420D (weft denis) / 50T (number of warp strips) * 36T (number of weft strips) Knitted fabric is made of warp and weft yarn in the form of threads and rings, usually divided into two types: warp knitting and weft knitting. Its specifications are often expressed in terms of denier number/code weight/width.
Common specifications of nylon cloth:
70D: 70D*170T+PU1 70D*190T+0.3MM PVC 70D菱形格+PU2+WR/
210D:210D*116T+PU1 210D*116T+PU2 210D*118T+0.35MM 平纹PVC
420D:420D*86T+PU2 420D*86T+0.4MM PVC 420D大斜+PU2+WR 420D十字提花PU2+WR
840D+PU2/PVC 1680D+PU2/PVC
CORDURA：500D+PU2+WR/PVC 1000D+PU2+WR/PVC
Common specifications of Tetosaurus fabric:
75D Printing Fabric +0.3MM PVC 150D Herringbone +PU1 300D*110T+PU2/0.3MM PVC
600D*300D*64T+0.5MM PVC 600D*64T+0.55MM PVC 600D*76T+PU2+WR
1200D+PU2+WR/0.6MM PVC 1800D+0.65MM PVC
Specifications of other commonly used cloth species:
1. PP cloth: 1000D PP flat weave + PU2 + WR 1200D PP twill + PU2 + WR 350D PP twill + PU2 + WR
THE CHARACTERISTICS OF PP cloth are light in weight, fastness and color fixation, good strength and heat resistance, anti-fouling and antibacterial properties, and can decompose naturally.
2. PE leaching cloth: also known as PE plastic cloth, is PE flat fabric upper and lower two sides of the leaching PE formation.
3. Warp and weft blend fabric: 420D*300D N/T two-color cross jacquard + PU2 (with two-color effect) T/ linen: 300D*12'S/2+0.4MM PVC (lower tariff on imports to the United States)
Dyeing and finishing process:
The blank cloth → coloring → with cloth→ roll cloth→ dyeing (pulping/refining/dyeing) → stereotyping (resin/water splashing) → packaging and then sent to printing/gluing or gluing
1. Coloring is considered after processing pvc
2. Dyeing at room temperature (nylon) High temperature (Tedolong / flat fabric / wrinkled cloth), pay attention to color fastness (daylight / wash / friction / UV resistance) and non-azo dyes (the European Community requires that all fabrics must not contain azo dyes)
3. The dyed color cloth is sent to the shaping machine, and the yarn is fixed at a high temperature of 140 ~ 190 ° C, the width is controlled, the feel (add resin), and the water splash or fireproof processing is done.
4. After the completion of the color cloth, there are the following kinds of treatment:
1). Printing: ink (roller printing) paste printing (transfer printing) paper printing (thermal transfer printing) automatic screen plate
2). Hot pressing: the roller engraved with the pattern at high temperature contacts the cloth surface to form a pattern
3). Brushing / hair / bristles: sandpaper / needle / brush contact with the cloth surface to form a sense of fluff
4). Glue: Apply an average layer of glue on the cloth surface (PU/ULY/color glue/waterproof and moisture-permeable) to achieve
To the waterproof/solid yarn and reinforcing effect, pay attention to the requirements of waterproof and moisture permeable, glue surface light haze and hand
The feeling must not be too hard.
5). Adhesive: Mainly divided into PVC glue / CPU glue (ie EMB glue) / TPE glue / FLEX glue and other types
(1). PVC glue: the PVC film and cloth fit to achieve waterproof solid yarn and strengthening effect, pay attention to the feel / texture / thickness / cold resistance and low toxicity.
(2). CPU glue: The CPU glue can be applied evenly on the cloth surface in the form of a coating
Waterproof/reinforcing/solid yarn effect. It has low toxicity, can be naturally decomposed and burned without producing toxic gas and other environmental protection characteristics, should pay attention to the feel / texture / glue color / cold resistance and other requirements.
(3). TPE/FLEX glue: the most environmentally friendly glue, used to replace PVC/EMB and other glues, TPE glue is softer.
4). Fit: refers to the cloth and PU foam / EVA / sponge together to achieve reinforcement or other functional effects (pad / heat preservation / pressure resistance)
Leather can be divided into:
A. Natural leather: (The constituent elements are: thickness / texture / light haze / coloring or transmutation)
1. Cowhide: genuine leather (first layer leather) for leather shoes / leather clothing / high-grade leather pieces, two hammer leather (two layer leather) for sports shoes and other general leather pieces.
2. Sheepskin: Lambskin is used for leather clothes/shoes/gloves, etc
3. Pig skin: general leather goods /gloves
4. Crocodile skin and ostrich skin for high-grade leather.
All natural leathers must be pre-captured with at least 30% loss when counting and cutting.
B. Faux Leather:
1. PVC rubber:
1) Thickness (0.8MM~2.0MM mainly from foam layer)
2) Width (36" 48" 54")
3) Base cloth (T/C 10P 6P knitted fabric woolen cloth non-woven cloth pay attention to white cloth bottom or dyed cloth bottom)
4) Embossed
5) Surface treatment (light haze printing flocking, pearlescent mirror)
6) Feel (softness, hardness, high elasticity, NAPA)
7) Use (bags, bags, shoes, shoes, furniture, vehicles)
8) Special requirements (cold resistance, sulfur resistance, yellowing resistance, twisting, friction resistance, slip resistance, low toxicity)
2. PU skin:
1) Thickness (0.6MM~1.2MM mainly from the thickness of the cloth base)
3) Base cloth (similar to PVC leather)
4) Surface treatment (similar to PVC leather)
5) Embossing (finer lines formed on the release paper)
6) Uses (bags, shoes, furniture, gloves)
7) Special requirements and feel
3. PVC tape: the constituent elements are
1) Thickness(0.1MM~1.0MM)
2) Pattern (drum formation)
3) Feel (general feel, hard, semi-hard)
4) Special requirements (cold tolerance and low toxicity)
4. Imitation cloth PVC leather:
1) Texture (imitation 210D imitation 420D imitation 600D imitation 1680D imitation sardine cloth pattern)
2) Width (56"~58")
3) Cloth base (70D, 210D, 200D/400D, 600D/300D, pay attention to whether it is dyed)
4) Total thickness (0.3~0.5MM)
5) Feel and special requirements
5. PVC clip mesh fabric:
1) Made of nylon or Tetolone with PVC double-layer bonding (so it can be used as a two-color effect)
2) Thickness(0.25~0.65MM)
3) 底布(210D,420D,250D,840D,600D)
4) Width (54")
5) Texture
6) Pay attention to special requirements such as light haze/hardiness/low toxicity
Third, quality parameters
600x600D:
PVC adhesive thickness: 0.56 – 0.58mm (56 -- 58C). +- 0.03mm (+- 3C).
Flat-bottom adhesive, twill adhesive, pearly adhesive backing.
Thread density: not less than 6.2 pins per inch.
PU adhesive thickness: 0.44 – 0.46mm (44 – 46C). +- 0.03mm (+- 3C).
600x300D:
PVC adhesive thickness: 0.53 – 0.55mm (53 -- 55C). +- 0.03mm (+- 3C).
Thread density: not less than 6 pins per inch.
PU Adhesive Thickness: 0.42 – 0.44mm (42 – 44C). +- 0.03mm (+- 3C).
420D:
PVC adhesive thickness: 0.36 – 0.38mm (36 -- 38C). +- 0.03mm (+- 3C).
0.38 – 0.41mm (38 – 41C) +-0.04mm(+- 4C)
PU adhesive thickness: 0.17 – 0.19mm (17 – 19C). +- 0.03mm (+- 3C).
Thread density: not less than 8.6 pins per inch.
600D Nylon, Polyester Five-Pack Fabric:
PVC adhesive thickness: 0.56 – 0.58mm (56 -- 58C). +- 0.03mm (+- 3C).
420D Nylon, Polyester Five-Pack Fabric:
PVC adhesive thickness: 0.36 – 0.38mm +- 0.03mm (+- 3C).
PU adhesive thickness: 0.20 – 0.22mm (20 – 22C). +- 0.02mm (+- 2C).
840D Jacquard Knitted Fabric:
PVC adhesive thickness: 0.39 – 0.41mm (39 -- 41C). +- 0.03mm (+- 3C).
PU Adhesive Thickness: 0.18 – 0.20mm (18 – 20C). +- 0.03mm (+- 3C).
Tavel (peach velvet or khaki) fabric:
PVC adhesive thickness: 0.54 – 0.57mm (54 -- 57C). +- 0.03mm (+- 3C).
PU adhesive thickness: 0.18 – 0.20mm (18 – 20C) +- 0.03mm (+- 3C).
Flower Yao Cloth:
PVC adhesive thickness: 0.75 – 78mm (75 – 78). +- 0.02mm (+- 2C).
420D Nerib: 0.18mm (18C).
210D Nerib: 0.18mm (18C).
190D Nerib: 0.1mm (10C).
Fourth, fabric knowledge
Generally, the description of the fabric is not very detailed, only cordura or HD. What it says is simply a method of weaving. If the description is more detailed, it should be material + fibrous + textile method. For example: N. 1000D CORDURA is 1000D nylon CORDURA material.
Many people think that the "D" in the backpack material represents denisity, or weight. This is all wrong. D is an abbreviation for denier. The Denier is the unit of measurement of fiber. The calculation method is: 1 gram per 9,000 meters long line weight is called Deniier. Therefore, the smaller the number in front of D, the thinner its line and the smaller the density. For example, the material of 210D has a particularly fine grain, which is generally used as the inside of the bag or the compartment. The 900D or 1000D material grain is thick, the line is also thick, very wear-resistant, and is generally used as a bag bottom.
First of all, the material, the raw materials of the fabrics generally used in the bag are Nylon and Poly, and occasionally the two materials are mixed together. Nylon is nylon and Poly is polyethylene, both of which are extracted from petroleum, and Nylon is a little better quality than Poly, and of course it is a little more expensive. In terms of fabric, Nylon feels softer.
Here's a quick look at some of the fabrics that often appear in backpacks:
1. CORDURA fabric, with light, quick-drying, soft, durable function, long-term use is not easy to change color. It is said that this fabric will appear in two colors from different angles. Generally woven with Nylon, with fiber (Denier) as the strength standard, there are 160D, 210D, 330D, 420D, 600D, 900D, 1000D, etc., the higher the number, the stronger the stronger, the coarser the grain. Generally 160D to 210D is used on clothing or used as the lining of general outdoor bags. The reverse of this material is coated, and the general rain will not soak the material thoroughly.
2. KODRA KODRA is a fabric produced in Korea. To some extent it can replace CORDURA. It is said that the inventor of this fabric originally wanted to study how CORDURA was spun, but finally did not study it, but invented a new fabric, which is KODRA. This fabric is also generally woven with Nylon, which is also based on the strength standard of fibrousness, such as 600D and 1000D. The reverse side is coated, similar to CORDURA.
3. The warp threads of OXFORD Oxford spinning are woven from two strands of thread, and the weft threads are also relatively thick threads. Its weaving method is one up and one down, which is a very general textile method. Generally 210D, 420D material. The reverse side is coated. Used as a paddle or compartment for the bag.
4. HD HD is short for High Density, meaning high density. Look at the fabric and OXFORD is similar. Generally 210D, 420D, usually used as a bag liner or compartment. The reverse side is coated.
5.R/S R/S is short for Rip stop. This fabric is nylon with small squares. It is tougher than ordinary nylon, and the squares on the fabric are surrounded by thicker threads. The middle of the squares is woven with very thin threads. Generally there are 300D, 330D, 450D, etc., which can be used as the main material of the backpack, such as large noodles, outer pockets and other parts. The reverse side is coated.
6. Dobby Dobby's fabric seems to be composed of many very small plaids, but if you look closely, you will find that it is woven from a thick and a thin thread, and the front and back lines are different. There is generally very little coating. The strength is much worse than cordura and is generally only used on casual or excursion bags. Do not use on the hiking bag.
7.VELOCITY VELOCITY is also a type of nylon cloth. The intensity is high. It is also commonly used on hiking bags. The reverse side is coated. Available in 420D or higher strength. The fabric front looks a lot like Dobby.
8. TAFFETA TAFFETA is a very thin coated fabric, some coatings more than once, so the waterproof performance is better. Generally do not make the main fabric of the backpack, only make a raincoat, or a rain cover for the backpack.
9.Poly PU is generally replaced by Poly. Poly densities are generally 64t (low), 74t (medium), and 82t (high). Fabrics from 150D to 1800D strength is getting stronger and stronger. Generally, a high strength of 600D can be used as the bottom of a hiking bag, but its weaving method is not as strong as cordura.
10. AIR MESH is generally called a space network Chinese, and it is different from the general network. Its mesh surface has a gap with the underlying material, generally 3mm or larger. It is this kind of gap that makes it have good ventilation performance, so it is generally used as a strap or back or other place close to the body.
11.Mesh General network has many specifications, not one by one. Nylon mesh is generally only placed on both sides of the bag as a glove pocket or water pocket.
5. Commonly used materials
<h1 class="pgc-h-arrow-right" data-track="190" > flannel</h1>
Flannel is pulled out of the yarn body by a brushing machine, and evenly covers the surface of the fabric, so that the fabric presents a rich fluffy cotton fabric. The flannel of the flannel is repeated by the tip of the wire needle of the velvet drawing machine, and the fluff formed by pulling up a part of the fiber on the surface of the blank cloth requires short and dense. Flannel is divided into single-sided velvet and double-sided velvet, and the fabric composition of single-sided velvet is mainly 2/2 twill, also known as beep velvet; the fabric organization of double-sided velvet is mainly plain.
<h1 class="pgc-h-arrow-right" data-track="192">PVC/PU革</h1>
In China, people are accustomed to using PVC resin as raw materials to produce artificial leather as PVC artificial leather (referred to as artificial leather); Artificial leather produced with PU resin as raw material is called PU artificial leather (referred to as PU leather): Artificial leather produced with PU resin and non-woven fabric as raw materials is called PU synthetic leather (referred to as synthetic leather).
The difference between PVC artificial leather and PU synthetic leather can be distinguished by the method of gasoline soaking, the method is to use a small piece of fabric, put in gasoline for half an hour, and then take out, if it is PVC artificial leather, it will become hard and brittle, if it is PU synthetic leather, it will not become hard and brittle.
<h1 class="pgc-h-arrow-right" data-track="195" > nonwovens</h1>
Non-woven fabrics can be divided into:
The exact name of non-woven fabrics should be nonwovens, or non-woven fabrics. Because it is a fabric that does not need to be spun and woven, it is only the textile staple fibers or filaments that are oriented or randomly lined to form a fiber mesh structure, and then reinforced by mechanical, thermal bonding or chemical methods. Nonwovens break through the traditional textile principle, and has the characteristics of short process flow, fast production speed, high output, low cost, wide range of uses, and many raw material sources, and its main uses can be roughly divided into:
1, spunlace non-woven fabric: is the high-pressure micro-water jet to one or more layers of fiber network, so that the fibers are entangled with each other, so that the fiber mesh can be reinforced and have a certain strength.
2. Heat-closed non-woven fabric: refers to the addition of fibrous or powder-like hot melt bonding reinforcement materials to the fiber mesh, and the fiber mesh is then reinforced into a cloth by heating and melting.
3, pulp gas flow into a net non-woven fabric: can also be called dust-free paper, dry paper non-woven fabric. It is the use of airflow mesh technology to open the wood pulp fiber board into a single fiber state, and then use the airflow method to make the fibers condensed on the mesh curtain, and the fiber mesh is reinforced into a cloth.
4, wet non-woven fabric: is the fiber raw material placed in the aqueous medium into a single fiber, while the different fiber raw materials are mixed, made of fiber suspension slurry, suspension slurry transported to the grid mechanism, the fiber in the wet state into a net and then reinforced into cloth.
5, spunbond non-woven fabric: after the polymer has been extruded, stretched and formed a continuous filament, the filament is laid into a net, and the fiber mesh is then bonded by itself, thermal bonding, chemical bonding or mechanical reinforcement method to make the fiber mesh into a non-woven fabric.
6, meltblown non-woven fabric: its process: polymer feeding --- melt extrusion --- fiber formation --- fiber cooling --- mesh --- reinforced into cloth.
7, acupuncture non-woven fabric: is a kind of dry non-woven fabric, acupuncture non-woven fabric is the use of the piercing effect of the needle, the fluffy fiber mesh reinforced into cloth.
8, sewing non-woven fabrics: is a kind of dry non-woven fabrics, sewing method is the use of warp knitting coil structure of the fiber mesh, yarn layer, non-textile materials (such as plastic sheets, plastic thin metal foil, etc.) or their combinations to strengthen, in order to make non-woven fabrics.
The use of non-woven fabrics
Its main uses can be roughly divided into:
(1) Non-woven fabrics for medical and sanitary use: surgical gowns, protective clothing, disinfection cloths, masks, diapers, civil rags, wipes, wet face towels, magic towels, soft towel rolls, beauty supplies, sanitary napkins, sanitary pads and disposable sanitary cloths;
(2) Non-woven fabrics for home decoration: wall cloth, tablecloth, bed sheet, bed cover, etc.;
(3) Non-woven fabrics for clothing: lining, adhesive lining, flocculent, stereotyped cotton, various synthetic leather bottom cloth, etc.;
(4) Non-woven fabrics for industrial use: filter materials, insulation materials, cement packaging bags, geotextiles, cladding fabrics, etc.;
(5) Non-woven fabrics for agricultural use: crop protection cloth, seedling cloth, irrigation cloth, insulation curtain, etc.;
(6) Other non-woven fabrics: space cotton, thermal insulation and sound insulation materials, linoleum, smoke filters, tea bags, etc.
Characteristics of non-woven fabrics: Non-woven fabrics break through the traditional textile principles, and have the characteristics of short process flow, fast production speed, high output, low cost, wide range of uses, and many sources of raw materials.
Denim/canvas
Denim is made of pure cotton indigo dyed warp and natural color weft yarn, using three up and one right twill tissue interwoven, generally can be divided into light, medium, and heavy three categories. The width of the cloth is mostly between 114-152 cm.
Cloth weight (g/m2) Yarn branch thickness (English branch)
Lightweight 200-340 g/m2 (6-10 oz/s2) 12×12 or more
Medium 340-450 g/m2 (10-13 oz/s2) 10×10
Heavy duty 450 g over 7×6 denim features:
1. Pure cotton coarse branch gauze twill, moisture permeable, good breathability, comfortable to wear;
2. The texture is thick, the texture is clear and properly treated, which can be anti-wrinkle, anti-shrinkage and anti-deformation;
3, indigo is a coordinated color can match a variety of color tops, suitable for all seasons;
4, indigo is a non-solid color, the more washed the lighter, the lighter the more beautiful. In addition to the traditional products mentioned above, there are also decors of denim:
1, the use of different raw material structure of the color denim;
(1) The use of a small proportion of spandex silk (accounting for about 3-4% of the yarn weight) as the core of the warp elastic warp or weft yarn, woven stretch denim;
(2) Snowflake denim with a low proportion of polyester and cotton blended as warp yarn, which produces a whitening effect after dyeing;
(3) High-grade denim woven with cotton and linen, cotton and wool blended yarn;
(4) Denim woven with medium and long fiber (T/R);
2, the use of different processing technology to weave the color denim
(1) Bark crepe denim woven from high twist weft yarn;
(2) When dyeing warp yarn, first use dyes such as vulcanization or Haichanglan to base the denim and then dye the denim of indigo;
(3) Colored strip denim with colored warp embedded in indigo warp;
(4) Hanging white or printed on indigo denim;
Canvas is a thicker cotton or linen fabric that gets its name from its original use for sails. Plain weave is generally used, and a few varieties use twill, and the warp and weft yarns are made of multi-stranded threads. Coarse canvas, also known as tarpaulin, is commonly woven with 58 (10 branches) 4 to 7 strands of thread, the fabric is firm and resistant to twists, has good waterproof performance, and is used for transport vehicles, cover cloth for open-air warehouses and outdoor tent cloth. Fine canvas warp and weft yarns are generally 2 strands of 58 to 6 strands of 28 (10 branches / 2 ~ 21 branches / 6) for labor protection clothing and supplies. After dyeing, it is also used as shoe fabrics, travel bags, backpacks and canvas box materials. Some of the fine canvas used for shoemaking can be woven into a double layer of tissue, combining the upper and the inside of the shoe into one, which can improve the quality of the upper. In addition, there are rubber canvas, shielding canvas for heat, fire and radiation, canvas for paper machines, etc. Rubber canvas requires high strength of warp and weft, uniform density of warp and weft, small difference between interweaving gaps of warp and weft lines, and no oil pollution, which is conducive to uniform penetration of glue when rubber is applied. The canvas for paper machines requires a thick body, soft and hard, clean and flat cloth surface, and good moisture permeability. The raw material of canvas has been developed into chemical fibers and glass fibers, which give canvas better performance.
Sixth, the bag fit glue
<h1 class="pgc-h-arrow-right" data-track="237" >1, plastic glue characteristics for bags and leather</h1>
★ Water-based bag leather special plastic glue for polymer materials, the introduction of international recent environmental protection formulas and advanced technology refined into a single-component adhesive;
★ It has many advantages such as room temperature curing, convenient operation, water resistance, acid resistance, earthquake resistance, fatigue resistance and so on;
★ It has a high solid content, does not flow after gluing, can denature well, drying speed is fast, and is suitable for use with industrial assembly lines.
<h1 class="pgc-h-arrow-right" data-track="241" >2, how to use plastic glue for bags and leather</h1>
★ Clean up the surface of the sticky surface oil, dirt and other dirt, keep clean and dry;
★ Rubber and other items should be lightly brushed and cleaned before gluing;
★ Glue can be prepared according to customer requirements hand type and mechanical drum type two categories to meet different requirements, hand type glue can be directly applied to the surface of the sticky, after a little pressure, 5-10 minutes can be initially cured, an hour later up to high strength;
★ Mechanical glue, the colloid can be put into the groove, after the glue is also slightly pressured, 5-10 minutes can be initially cured, one hour after the high strength;
★ In some important occasions, it should be heated and dried first, and then activated for 3 to 5 minutes, and the activation temperature is 60 ° C ~ 70 ° C.
<h1 class="pgc-h-arrow-right" data-track="247" >3, bags of leather special plastic glue precautions</h1>
★ Water-based plastic glue for leather is flammable, and storage and transportation are handled in accordance with the rules of flammable products;
★ When using, ventilation should be ventilated, pay attention to safety, and operation should be kept away from the source of fire;
★ After use, the container will be tightly covered to prevent the colloid from solidifying, if the glue is too thick, it can be diluted with an appropriate amount of toluene and halogen.
★ Double-sided glue is better than single-sided glue;
★ Do not move the adhesive surface easily, otherwise the air enters and affects the strength;