Properties of polypropylene high-strength fibre:
1. The strength of polypropylene high-strength fibre is comparable to that of polyester and nylon industrial yarns, and the strength is exactly the same in wet and dry conditions
2. Polypropylene has a density of 0.919/cm’, which is the smallest among all industrial synthetic fibers. Its density is only 66% of polyester (1.389/cma) and 80% of nylon (1.149/cm3). Considering the price and density of the silk, the use of polypropylene high-strength silk as raw material will reduce the cost a lot compared to polyester or nylon industrial silk. In addition, because polypropylene fiber has low moisture absorption (MO.1%), it is especially suitable for marine products and other products that require non-hygroscopicity.
3. Good wear resistance and flexibility
4. Resistance to mildew. Polypropylene is not eroded by insects and bacteria.
5. Good stability to chemicals. Since polypropylene has no active groups in its molecular structure, it has very good stability to acids, alkalis and other chemicals, even better than polyester and nylon, making it suitable for many chemical industries.
6. Anti-ultraviolet and dyeing properties have been resolved. The light resistance of polypropylene itself is not good, but by using polypropylene chips with stabilizers, excellent resistance to ultraviolet radiation degradation can be achieved, and the product is suitable for outdoor use. Polypropylene is difficult to dye, but it has been solved by adding dyeing aids or coloring the original solution.
What are the factors that affect the strength of polypropylene high-strength fibres?
1. The influence of melt index
The melt index of the raw material indicates to a certain extent the molecular weight of the raw material. Under the same process conditions, the amount of fiber increases. The degree of molecular entanglement is large, and the strength of the drawn fiber increases with the increase of molecular weight. When the molecular weight is low, slippage between molecular chains is easy to occur, which is manifested in the decrease of fiber strength. In the spinning process of polypropylene high-strength yarn, several raw materials with different melt indexes are used.
In the trial spinning process, it was found that under exactly the same process conditions, the melt index of the raw materials was different, and the strength of the finished yarn was different, and showed a certain regularity.
Under the same spinning temperature, the same draw ratio and the same process parameters, the lower the melt index of the polypropylene chip, the higher the strength of the polypropylene high-strength yarn.
2. The influence of stretching ratio
The stretching process of the nascent fiber is to destroy the original structure of the nascent fiber and generate a new order structure. Under the action of tensile stress and thermal effect, the activity of the macromolecular segment is increased, and various structural units slide the fiber. Axial orientation gathers, rearranges, and adds new bonding points, so that more molecular chains of the fiber are in a particularly good stress-bearing state, and the regularity of the three-dimensional structure (ie crystallization) is generated. The fiber density increases with the increase of the stretching ratio. .
As the draw ratio increases, the strength of the fiber increases, and the draw ratio makes a greater contribution to the strength of the fiber.
Jiangyin Jinmeng Textile Co., Ltd. is a professional manufacturer of high-strength polypropylene industrial yarns, engineering fibers, high-strength polypropylene yarns, woven geotextiles and polypropylene luminous yarns. It is located in Yunting City, Jiangyin City, which is adjacent to the Yangtze River in the south of Taihu Lake. The transportation is very convenient in the industrial zone.
Polypropylene high-strength fibre has the advantages of environmental protection, non-toxic, acid and alkali resistance, light specific gravity, low thermal shrinkage, low thermal conductivity, low electrostatic storage, and almost no moisture absorption. The product has great potential in industrial yarns and can be widely used In industries such as industrial slings, safety belts, conveyor belts, woven geotextiles, filter cloths, canvas, thread making, ropes, cables, etc., it is a novel textile material that partially replaces nylon and polyester.
How many of the six properties
