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I am a polypropylene high strength wire. Although I am small, I need me everywhere in my life. Some factors may change me during my growth.
Secrets affect me - the three major factors of the strength of polypropylene high strength wire:
The melt index of the raw material indicates the molecular weight of the raw material to a certain extent, and the amount of fiber increases under the same process conditions. When the molecular entanglement is large, the strength of the drawn fiber increases as the molecular weight increases, and when the molecular weight is low, slippage occurs between the molecular chains, which is manifested in a decrease in fiber strength. In the polypropylene high-strength spinning process, several different melt index raw materials were used.
The stretching process of nascent fibers destroys the original structural form of the nascent fibers, and generates a new sequence structure. Under the action of tensile stress and thermal effect, the activity of the macromolecular segments is increased, and various structural units slide the fibers. The axial orientation gathers, rearranges and adds new bonding points, so that more molecular chains of the fiber are in the optimal stress-bearing state, and the regularity (ie, crystallization) of the three-dimensional structure is generated, and the fiber density increases with the increase of the stretching factor. .
In the spinning water line of the one-step polypropylene high strength wire, the stretching speed is approximately equal to the spinning speed. The degree of orientation and crystallinity of the fiber are affected by the stretching speed in addition to the stretching factor. In the stretching process of polypropylene primary fibers, two changes must be made. One is to completely destroy the natural crystallinity, and the other is to rearrange and recrystallize the macromolecules. Due to the long molecular chain of polypropylene, such as high tensile speed, the development of tensile deformation can not keep up with the change of tensile stress, the hysteresis is serious, and the macromolecule does not have enough time for orientation and crystallization, showing the strength of the fiber. decline.
Therefore, if the strength of the polypropylene high strength wire is increased. A variety of ways can be used. At a certain spinning temperature, when the melt index of the raw material is low, higher strength can be achieved under the condition of lower draw ratio. If the melt index of the raw material is higher, it is necessary to compare A large stretching factor can achieve a certain strength. For the same raw material, the finished product can be brought to the required strength by adjusting the draw ratio, spinning speed, spinning temperature, steel blowing temperature and wind speed. Through the reasonable cooperation of the process parameters, it is possible to produce polypropylene high strength wire with high strength and good quality.
After listening to my introduction, did you know anything about me?
The polypropylene high strength wire produced by Xuzhou Peace Chemical Fiber Co., Ltd. has good anti-aging ability and is not prone to aging after a long period of use. At the same time, the "peace" brand polypropylene high strength wire is also very good in corrosion resistance and wear resistance. From another perspective, its use has a long life. It is also very environmentally friendly. It does not produce any harmful substances to the human body and the environment. It is a new type of chemical fiber material, and it is also a very safe choice for you.