What are the factors affecting strength of polypropylene high-strength fibre?
1, the 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 fibre spinning process, several different melt index raw materials were used.
During the test texture, the melt index of the raw materials is different under completely identical process conditions, and the strength of its finished wire is different, and there is a certain regularity.
Under the same spinning temperature, the same tensile number and its process parameters are also identical, the lower the melt index of the polypropylene slice, the higher the strength of the polypropylene high-strength fibre.
2, the effect 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 more molecular chains of the fibers are in particular stress, and generate the regularity of the three-dimensional structure (ie crystalline), the fiber density increases with the increase of the draw ratio. .
As the tensile fact increases, the strength of the fibers increases, and the intensity of the tensile multiples is large.
Jiangyin Jinmeng Textile Co., Ltd. is a professional company specializing in high-strength polyprophydry industrial silk, engineering fiber, high-strength propylene, woven geotextile and polypropylene, and is located in the south to Taihu North Yunting. Industrial area, traffic is very convenient.
The polypropylene high-strength fibre has environmentally friendly, non-toxic, acid resistance, alkali resistance, light specific gravity, low heat shrinkage, low thermal conductivity, low static savings, almost unhaneous moisture, etc., products have great potential in industries, can be widely used In terms of industrial suspenders, seat belts, conveyor belts, woven geotextiles, filter fabrics, footprints, lines, rope, cable, etc.
What are the factors affecting
