国产产无码乱码精品久久鸭,人妻少妇精品视频一区二区三区 ,欧美色精品人妻在线视频,97在线观看播放

Do you know what is the three factors affecting the strength of the polypropylene, is it? Let's let you talk about you.

1. Effect of melt index

The melt index of the raw material represents a degree of raw material molecular weight, and under the same process conditions, the amount of fibers increases. The molecular entanglement is large, and when the strength of the tensile fibers increase the molecular weight as the molecular weight is increased, the molecular chain is easily pulled off, and the fiber is reduced. During the polypropylene high strength spinning process, several different melt index raw materials were used.

2. Influence of stretching multiple

The stretching process of the initial fiber is to destroy the original structural form of the newly-bobular, generate a new sequential structure, increase the activity of the macromolecular segment under the action of tensile stress and thermal effect, and various structural units slide the fibers. The axial orientation aggregation, rearrangement, increase the new binding point, so that the more molecular chains of the fibers are in the optimum stress, and generate the regularities of the three-dimensional structure (ie crystallization), the fiber density increases with the increase of the draw ratio. .

3. Influence of stretch speed

In a spinning wire of polypropylene high strength, the stretching speed is about equal to the spinning speed. The degree of orientation and crystallinity of the fibers are also affected by stretching velocity in addition to the impact of the tensile number. Apropylene's newborn fiber is completed during the stretching process

Two changes, one is to completely destroy the natural crystallinity, and the other is to rearrange the macromolecule and recrystallize. Since the polypropylene molecular chain is long, such as high stretching speed, the development of the stretch-shaped strain does not control the change in tensile stress, the hysteresis is severe, the macromolecule does not have enough time to perform orientation and crystallization, showing the strength of the fiber decline.

In practice, the main factor affecting the strength of the polypropylene is is the melt index, tensile multiples and stretching speed of the raw material. Among them, the stretch multiples have the greatest contribution to the strength of the polypropylene high strength.

"Hongyang" brand polypropylene high-strength yarn products have small color difference, good color fastness, high strength, and are widely used in decorative belts, safety belts, marking lines, etc.

Taixing Hongyang New Materials Technology Co., Ltd. has consistently adhered to the "excellent quality, customer first, quality service, adhere to the contract," the purpose, with high-quality products, good reputation, selling the country. Wholeheartedly with the domestic business win-win cooperation and common development!