What is the raw material of the seat belt?

According to the standard, seat belts and safety ropes should use nylon, vinylon, and silk materials, and metal fittings should use ordinary carbon steel. In fact, due to the low strength of vinylon materials, they are used less and less in actual production. The strength of silk material is similar to that of nylon. It has good heat resistance and light specific gravity. It is a good material for making seat belts, but it is expensive and seldom used except in special places. With the continuous development of science and technology, the research and development of new technologies and new products, some new materials with high strength, light weight and better comfort are used in the production of safety belts and safety ropes. These materials should not be excluded from safety. Outside of production. In addition, when selecting raw materials, producers should pay attention to identifying high-strength yarns and polypropylene yarns. Polypropylene fiber is not resistant to aging and is a material that is prohibited by the state from being used in the production of safety belts. If polypropylene is used in the production of safety belts, it will pose a great threat to the lives of the users. Because polypropylene filaments and high-strength filaments are very similar in appearance, it is difficult for non-professionals to identify them. Manufacturers should pay special attention to them when purchasing raw materials. When the authenticity cannot be identified, it should be sent to the relevant department for inspection, and it can be used only after passing the inspection. Users of seat belts should also increase their self-protection awareness, pay attention to identifying the materials of the seat belts when purchasing, and ask for relevant certificates from the manufacturer. Avoid using it when you cannot confirm it. The safety belt standard expressly stipulates that the use of welded semicircular rings, triangle rings, figure-eight rings, pin-shaped rings, and circular rings is not allowed. However, in order to reduce production costs, some companies still use welded parts to assemble seat belts, and some users have not paid enough attention to this problem. There is a great hidden danger of insecurity. The welding process itself is an ancient production process. The welding quality is good, and the strength of the weld joint will not be lower than that of other parts of the accessory; if the welding quality is not good, the metal part will be disconnected from the weld joint first when the force is applied. Companies that produce welded parts are mostly informal manufacturers with low technology, poor processing capabilities, and quality cannot be guaranteed. It is very dangerous to use such parts to assemble seat belts. In the event of a fall accident, casualties are inevitable. Therefore, both producers, sellers and users should pay enough attention to this issue and control the quality of each.

Performance and maintenance of high molecular polyethylene cable

1. The main performance of high molecular polyethylene cable: Passed 640kv/5min power frequency withstand voltage test (electric power). Light weight, floating on the water, about 87.5% lighter than steel wire ropes of the same diameter. The highest strength in the world, about 1.5 times stronger than steel wire ropes of the same diameter. Different durability, sea water resistance, chemical resistance, ultraviolet radiation and temperature difference repeated, the quality of use remains unchanged. The operation of the stone throwing net is convenient, fast, safe to use, and the operation is short, such as the ability of the army to move quickly under certain circumstances. 2. Types and maintenance methods of high molecular polyethylene ropes: Ropes are still relatively common in life, but many people are not very clear about the small uses of ropes. There are actually many types of ropes, which are distinguished by purpose: 1. Static rope, also known as white rope, is used for rappelling cave exploration. Although it has ultra-low elasticity, it has strong abrasion resistance. 2. Power ropes are also called flower ropes and braided ropes. They are used as necessary items for sports climbing or pioneer climbing. They have high-quality elasticity, but they are expensive. Generally, the diameter is 10mm-11mm (9mm is optional for mountaineering. ). 3. Power rope (with waterproof treatment) is mainly used for water-based sports such as river tracing and ice climbing due to its special waterproof treatment. The diameter is about 10mm-11mm. 4. Marine ropes, used for mooring boats. In addition to light specific gravity, high strength, good impact resistance and abrasion resistance, the ship rope has the advantages of corrosion resistance, mildew resistance, and insect resistance. For example, the strength and abrasion fastness of nylon cables are several times higher than that of hemp and cotton cables. The specific gravity of polypropylene cables is less than water and can float on the water surface, which is convenient and safe to operate. According to the processing structure, chemical fiber ropes are divided into two types: 3-strand and multi-strand twisted rope and 8-strand and multi-strand braided twisted rope. The 3-strand rope generally has a diameter of 4-50 mm, and the 8-strand rope generally has a diameter of 35-120 mm. In addition to being used for ship mooring, chemical fiber ropes are also widely used for square rope nets in transportation, industry, mining, sports and fishery. Because the storage of the rope is inconvenient, it is not a popular rope appliance; the rope should be used to avoid incorrect use methods such as sunlight, acid solution (non-neutral detergent), abuse (using SM or stepping on the rope), etc., generally put the rope In the laundry bag, throw it into the washing machine, put in a neutral detergent, wash it, and then dry it in the shade. When storing the rope, you must carefully verify the skin and twist of the rope. If the skin is broken or sprayed, cut and use it for other purposes. When cutting the rope, stick the tape to the ends of the cutting point. After cutting, use fire to fuse the ends of the rope. Shengrui.

Electric traction rope-ultra high molecular polyethylene cable

The strength of the ultra-high molecular polyethylene fiber cable fiber is the highest in the world, which can reach 15 times the quality of steel wire, and its elongation is low, which is comparable to the breaking elongation of metal steel wire!! High molecular weight polyethylene (Dini ma) products have a light specific gravity (when the strength is equal to the unit length, the weight is only one tenth of the steel wire rope, and the insulation performance is good, has passed the 640kv withstand voltage test), and has been widely used in live working projects , To ensure the safety of construction personnel equipment and improve the efficiency of construction. The elongation rate of the mature electric traction rope produced by our company is almost zero. 1. Light weight. high strength. Make operation more convenient and fast. 2. Twelve-strand braided anti-twist structure, low extension, making the operation faster and safer. 3. The advantages of anti-bending fatigue, anti-corrosion, anti-ultraviolet performance, unaffected by salt water, and non-absorbent, improve the durability of the rope. 4. Withstand voltage insulation brings more convenience to the construction without power failure, and it is the most ideal product with a little crossover at present.

How to use linen rope safely and reasonably?

We know something about flax rope, which can be used in many fields, and it can be used for packaging and binding. Because hemp rope is used more frequently, there are many types of hemp rope on the market, but from my observation, the white and brown linen rope is relatively strong. And it is more wear-resistant and corrosion-resistant. Therefore, it is also widely used in hoisting, but what we need to know is how to use linen rope to be more safe? 1. When hoisting, it is more suitable for lighter objects. 2. Be sure to check the safety of the rope before using it. If you find any abnormalities, such as yellow rust, try not to continue using it. 3. During use, if the rope is found to be skewed, it needs to be straightened immediately, but do not use too much force or place it on a hard object to shake. Prevent shortening of life and lower strength. 4. If it is used as a gold rope, it should be considered that the load is reduced and the force cannot be pulled. 5. When binding objects, try to avoid binding them in sharp places, and then bind them in a flat position. 6. ​​Do not store for too long in a corrosive place, and do a good ventilation and dry treatment in time. 7. If it is a new hemp rope, it should not be knotted when using it, and some rope ends can be pulled out.

Varieties of polypropylene

The varieties of polypropylene fibers include filaments (including undeformed filaments and bulky textured filaments), short fibers, bristles, split-membrane fibers, hollow fibers, shaped fibers, various composite fibers, and non-woven fabrics. The main purpose is to make carpets (including carpet base cloth and suede), decorative cloth, furniture cloth, various ropes, strips, fishing nets, linoleum, construction reinforcement materials, packaging materials and industrial cloths, such as filter cloth and bag cloth Wait. In addition, the application in clothing is becoming more and more extensive. It can be blended with a variety of fibers to make different types of blended fabrics. After knitting, it can be made into shirts, outerwear, sportswear, socks, etc. The quilt made of polypropylene hollow fiber is light, warm and elastic. Polypropylene is the Chinese trade name of synthetic fiber isotactic polypropylene fiber made from propylene, a by-product of petroleum refining, also known as polypropylene fiber. According to the "2013-2018 China Polypropylene Fiber Industry Competitive Pattern and Development Trend Research Report", the downstream industry of polypropylene fiber will enter a new round of business cycle in the future, which will bring about the expansion of polypropylene fiber market demand, and the sales of the polypropylene fiber industry have rebounded significantly. , The relationship between supply and demand has been improved, and the profitability of the industry has been steadily improved. At the same time, under the national "Twelfth Five-Year" plan and the general policy of industrial structure adjustment, polypropylene fiber is facing huge market investment opportunities, and the industry is expected to usher in new development opportunities.

What is jute

Upright woody herb, 1-2 meters high, glabrous. Leaves are papery, ovate-lanceolate to narrow-lanceolate, 5-12 cm long, 2-5 cm wide, apex acuminate, base round, hairless on both sides, three veins on both sides of the veins ascend but not half , The midrib has 6-7 pairs of lateral veins, with thick serrations on the edges; petioles are about 2 cm long and pilose. The flowers are solitary or arranged in axillary cymes, with short stalks and stalks; sepals are 4-5 pieces, 3-4 mm long; petals are yellow, obovate, approximately the same length as the sepals; stamens 18-22 pieces , Free; ovary glabrous, stigma lobed. The capsule is spherical, 1 cm in diameter or slightly larger, without an angle at the top, with straight blunt edges and nodules on the surface, with 5 lobes dehiscing. Flowering in summer, the fruit matures after autumn. An annual upright woody herb, 1～4m high, and the whole plant is glabrous. The leaves are papery, ovate-lanceolate to narrow-lanceolate, 5-12cm long, 2-5cm wide, apex acuminate, base round, 3 veins on both sides of the veins are ascending but half, the central vein has lateral veins 6～ Seven pairs, with thick serrations on the edges, and 1 tooth elongated near the base to form a diamond shape; petioles are about 2cm long and pilose; stipules are linear and shed. Cymes are axillary, with several flowers, small, yellow; sepals are light purple, about 4mm in length; petals are obovate, nearly as long as sepals; stamens are numerous; ovary is glabrous. The capsule is spherical, about 1 cm in diameter, with longitudinal ribs and verrucous protrusions, and the top is truncated or depressed, and it is 5-valved at maturity. Flowering period from July to August, fruiting period from September to October.