Polyamide commonly known as nylon (Nylon), English name Polyamide (referred to as PA), is a general term for thermoplastic resins containing repeating amide groups -[NHCO]- on the main chain of the molecule, including aliphatic PA, aliphatic-aromatic PA and aromatic PA . Among them, aliphatic PA has many varieties, large output and wide application, and its name is determined by the specific number of carbon atoms of the synthetic monomer. It was invented by the famous American chemist Carothers and his research group.
The nylon fibers used can be divided into two categories.
One kind is the poly-diacid diamine obtained by polycondensation of diamine and diacid, and the chemical structural formula of its long-chain molecule is:H-[HN(CH2)xNHCO(CH2)yCO]-OH
The other type is obtained by lactam polycondensation or ring-opening polymerization, and the chemical structural formula of its long-chain molecule is:H-[NH(CH2)xCO]-OH
USE
Polyamide is mainly used for synthetic fibers, and its most prominent advantage is that its abrasion resistance is higher than that of all other fibers, which is 10 times higher than that of cotton and 20 times higher than that of wool. Greatly improve its wear resistance; when stretched to 3-6%, the elastic recovery rate can reach 100%; it can withstand tens of thousands of times of bending without breaking.
The strength of polyamide fiber is 1-2 times higher than that of cotton, 4-5 times higher than that of wool, and 3 times that of viscose fiber. However, polyamide fiber has poor heat resistance and light resistance, and poor retention, and the clothes made of it are not as stiff as polyester. In addition, both nylon-66 and nylon-6 used for clothing have the disadvantages of poor hygroscopicity and dyeing properties. For this reason, new varieties of polyamide fibers - new polyamide fibers of nylon-3 and nylon-4 have been developed. Lightweight, excellent wrinkle resistance, good breathability, and good durability, dyeability and heat-setting properties are therefore considered promising.
This type of product has a wide range of uses. It is a good material for plastics such as steel, iron, copper and other metals, and is an important engineering plastic; cast nylon is widely used to replace wear-resistant parts of mechanical equipment, and replace copper and alloys as wear-resistant parts of equipment. . It is suitable for making wear-resistant parts, transmission structural parts, household appliance parts, automobile manufacturing parts, screw-proof mechanical parts, chemical machinery parts, and chemical equipment. Such as turbines, gears, bearings, impellers, cranks, instrument panels, drive shafts, valves, blades, screw rods, high-pressure washers, screws, nuts, sealing rings, shuttles, sleeves, bushing connectors, etc.
Replacing metals such as copper
Because polyamide has non-toxic, light weight, excellent mechanical strength, wear resistance and good corrosion resistance, it is widely used to replace copper and other metals in the manufacture of bearings, gears, Pump vanes and other parts. Polyamide has high strength after melt spinning and is mainly used as synthetic fiber and can be used as medical suture.
For various medical and knitwear
For civilian use, it can be blended or spun into various medical and knitted products. Nylon filaments are mostly used in knitting and silk industries, such as woven single stockings, elastic stockings and other wear-resistant nylon socks, nylon gauze, mosquito nets, nylon lace, elastic nylon outerwear, various nylon silk or interwoven silk products. Nylon staple fibers are mostly used for blending with wool or other chemical fiber wool products to make various wear-resistant and wear-resistant clothing.
Nylon is widely used in industry to manufacture cords, industrial fabrics, cables, conveyor belts, tents, fishing nets, etc. It is mainly used for parachutes and other military fabrics in national defense.
In the 1990s,when leather bags are prevalent in the world,VIVISECRETalready foresaw people in the future would travel more and morefrequently,and heavy luggage must be a burden,especially air travel.In 2005,the founder of VIVISECRET carefully stitched together thedragon cloth of parachute and artifi
Washing: Add a small amount of laundry detergent or soap powder to the clean water and gently rub and wash. If there are stubborn stains, you can use a soft brush to gently brush to avoid long-term soaking, and try to avoid water on the leather part.
Canvas is a thicker cotton or linen fabric, so named because it was originally used for sails. Generally, plain weave is used, a small amount of twill weave is used, and multi-strand threads are used for warp and weft yarns. Canvas is usually divided into two categories: coarse canvas and fine canvas.
Digital printing is printing using digital technology. Digital printing technology is a high-tech product that integrates machinery, computer electronic information technology and is gradually formed with the continuous development of computer technology. The emergence and continuous improvement of this technology has brought a new concept to the textile printing and dyeing industry, and its advanced production principles and methods have brought an unprecedented development opportunity to the textile printing and dyeing industry.
The introduction of luggage is generally divided into: style package, material package, function package, box typeStyle bags: women's bags, men's bags, handbags, travel bags, student bags, mountaineering bags, etc.Material bag: cloth bag, leather bag, PVC bag, EVA bag, canvas bag, non-proof cloth ba
Image result for tactical bagThese are the basic items you need in a tactical pack: First aid kit or IFAK pouch. Food, including high-protein, energy-boosting snacks....If you're packing a survival backpack, you'll also need these basic items:Bedding.Clothing.Communication equipment.Defense items.Fi
Polyester-cotton refers to the general term for blended fabrics of polyester and cotton. Textiles woven with 65%-67% polyester and 33%-35% cotton blended yarns are commonly known as "really good". It is a common material for making clothes.Polyester and cotton polyester are two different materials.
1. 1. Partial cleaning is recommended, try to clean only the dirty part. 2. 2. The raw material of the canvas bag is cotton, which is dyed and processed. After a period of time, the newly bought bag may fade when it is washed for the first time, which is normal. In order to prevent color fading, when cleaning for the first time, you can add some salt to the water, soak it for about 20 minutes, and then start scrubbing, so that the canvas bag cannot easily fade. 3. 3, cold water cleaning When cleaning the canvas bag, it is best to wash it in cold water. Hot water can easily burn it. Try to wash it by hand, not by machine. Canvas bags are cotton, so don't use detergents that contain bleach, and it's best not to use fluorescent ones, or the bag will fade and become unsightly. 4. 4, the amount of detergent The canvas bag is made of cotton, and it will fade if it is not cleaned properly, so try to reduce the amount of detergent when washing.
We are Guangzhou Huakui Leather Co., LTD. founded in 2011, is a bag manufacturer with integration of research, design, production and sales.