What is the raw material of colloidal cotton

Sprayed cotton, also known as sprayed cotton, is a kind of non-woven fabric, commonly known as space cotton or vacuum cotton. Cured and processed. Because of its fluffy, high compression resilience, resistance to dry and wet washing, and light weight and warmth, it has become the processing and manufacturing of cotton clothing and ski shirts, space suits and quilts, sleeping bags and other bedding and some in recent years. Important material for industrial supplies.
Raw material selection:
According to the formation principle of the sprayed cotton structure, in order to enable the sprayed cotton to obtain excellent physical and mechanical properties, it is necessary to research and select the selection of fiber raw materials and binders, as well as the production process. Among them, the selection of fiber raw materials is obvious. more important.
The type and specification of the fiber raw material play a decisive role in the quality of the sprayed cotton product. According to the application requirements of spray-bonded cotton, in order to achieve the characteristics of good warmth retention, good fluffy and soft hand feel, it is necessary to make a good choice in the fiber size, length, crimp, cross-sectional shape and surface treatment status, etc. . As we all know, the quality of synthetic fibers is determined by a combination of many performance indicators, mainly including three categories of physical and mechanical performance indicators, stability performance indicators and processing performance indicators. For different production processes, the requirements for its quality indicators are not exactly the same. As far as the fibers used in the sprayed cotton are concerned, the fineness of the fibers is required to be fine, the number of crimps and the degree of crimp are high, and the cohesion between the fibers is good. In this way, the bulk, compressive elasticity and elastic recovery of the product are also high. It is better to use three-dimensional helical crimping at the beginning of the crimp, and the bulkiness and elastic recovery rate of the product are obviously better than those of the same product with flat wave crimping; the high hollow rate can give the product a higher thermal retention rate and a lower specific gravity; spinning The type of silk finishing agent and the level of fiber oil content and moisture regain not only affect the processing performance, but also play an important role in improving the feel of the product and eliminating static electricity in the production process. The commonly used hollow spiral crimped polyester fiber has a fineness of 6.6-7.7 decitex (dtex) and a length of 51-76 mm. The fiber of this specification has better comprehensive properties. If the fiber is too thin or too long, it will produce a soft and stiff hand; if it is too short or too thick, the hand will be rough and hard. The crimp is preferably a spiral three-dimensional crimp, and the commonly used crimp number is 0.5~0.6 pieces/mm. If round hollow fiber is used, the hollowness is better at 5~10%, and its feel, elasticity and warmth retention can be greatly improved, and at the same time, the amount of fiber can be reduced accordingly. Mixing 30~70% imitation down fiber into conventional polyester can produce down imitation spray cotton. The so-called imitation down fiber is actually a three-dimensional crimped hollow polyester fiber treated with silicone oil. The characteristics of this fiber are soft and smooth, the fibers are not tangled with each other, and the fluffy is good. Therefore, the finished product can achieve sufficient elasticity and feel Smooth and fluffy, with the characteristics of down.