Velveteen regeneration polyester super-short fiber and production technique thereof

Abstract

The invention discloses velveteen regeneration polyester super-short fiber and production technique thereof. The velveteen regeneration polyester super-short fiber is prepared from regenerative PET materials by raw material pre-treatment, rotary drum drying, melt spinning, cooling forming, wire placing barrel falling after winding, bundling, drafting, curling, oiling, heat setting and cutting to obtain the product fiber. According to the production technique of the invention, the velveteen regeneration polyester super-short fiber can save cost, protect environment and further ensure the product quality and further prevent the super-long and over-length fibers from being generated in the production process; the cut length of the obtained product is uniform and precise and controlled within 3 to 12mm and the product has the similar appearance and hand feel similar to the down. The velveteen regeneration polyester super-short fiber has smooth hand feel and ideal down filling effect; the suitable fiber length of the velveteen regeneration polyester super-short fiber is convenient for the downstream producers to realize the fully-automatic filling, improve the production efficiency and have higher cost performance in compared with the super-short fiber spun by the raw material.

Description

technical field [0001] The invention relates to a differentiated polyester staple fiber and a production process thereof, in particular to a goose down imitation regenerated polyester ultra-short fiber and a production process thereof. Background technique [0002] The down used as filling in cold products is the flower-shaped fluff from the underarms and belly of geese and ducks. Down not only has good warmth retention and softness, no feeling of pressure and stuffiness, but also has the function of moisture absorption and perspiration. Down is a kind of animal protein, which has a higher thermal insulation capacity than vegetable fibers such as cotton. The three-dimensional triangular skeleton structure of down itself can store a lot of air, and the air itself is a poor conductor, so it can resist the external cold and the loss of body temperature . However, down is a natural product, so the quality varies. [0003] Polyester (that is, polyester fiber) is an important v...

AI Technical Summary

Problems solved by technology

However, the production of imitation goose down products is difficult, and the requirements for fineness are relatively high. The fineness of the product must be controlled at 1.2 dtex to achieve the effect of imitation goose down. It is difficult for conventional processes to meet the continuous production requirements of recycled ultra-fine polyester.

Moreover, the existing conventional goose down-like polyester staple fiber products are mainly concentrated in lengths of 32cm, 51cm, and 64cm. When downstream manufacturers use them as fillers, they need to use manual semi-automatic filling, which cannot be fully automatic filling by machines, and the production capacity and efficiency are low.

[0006]The use of shorter polyester ultra-short fibers can realize the automatic filling of filling materials, improve production capacity and production efficiency, but at present, most polyester ultra-short fibers are made of virgin The material is processed into slices and then spun, and the production cost is relatively high; there are also polyester blocks produced in the production process of waste PET (ie polyethylene terephthalate) bottle flakes, sheets, films and polyester materials Recycled PET materials such as raw materials and waste silk are used as raw materials to reduce costs and realize resource reuse

However, due to the uneven quality of recycled PET materials, their intrinsic viscosity and melting point are very different from those of polyester chips processed from raw materials, and they also contain more non-polyester plastic impurities and moisture, resulting in poor spinning quality. Seriously affected, there is a big gap between the appearance and feel of the finished fiber compared with the real down

[0007]Besides, due to the limitation of technological conditions, there are problems in the production process that the fiber fineness and bulkiness are difficult to achieve the effect of imitating goose down, the degree of fiber stretching is not uniform enough, and it is easy to stretch when stretching. Disadvantages such as breakage, fiber cutting length is not uniform and accurate, easy to produce super long and double long fibers