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Method for preparing polyester micro/nano-fibre non-woven material

A technology of non-woven materials and nanofibers, applied in non-woven fabrics, cellulose/protein conjugated artificial filaments, fiber processing, etc. The problem of low efficiency of the silk method is achieved, and it is easy to realize large-scale production, the filtration and adsorption effect is remarkable, and the effect is universal.

Inactive Publication Date: 2009-01-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods generally have problems such as low output, large equipment investment, and limited fiber fineness.
For example, the post-stretching process control of the super-stretching method is unstable, the equipment yield is low, and it is difficult to adapt to large-scale production
Two-component composite spinning mainly includes two "sea-island" spinning methods of "fixed island" and "indeterminate island". Polyester microfibers have been prepared by using the "fixed island" and "indeterminate island" methods. However, it is difficult to recycle when the matrix components are dissolved, and the discharge will pollute the environment. Moreover, when the "fixed island" type spinning is used, the structure of the spinning components is complicated, the processing is difficult, and the investment in equipment is large.
The most commonly used methods of direct spinning are electrospinning and melt blowing, but the efficiency of electrospinning is low, and it is mainly aimed at solution systems; while the melt blowing method only obtains ultrafine fibers of micron and ultramicron sizes, etc.
The above-mentioned problems have greatly affected the research and development of polyester microfiber nonwoven materials.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1900 grams of cellulose acetate butyrate and 100 grams of polyethylene terephthalate are dried in an oven, and after the two are blended, they are melt-spun and wound on a twin-screw spinning machine to obtain polyethylene terephthalate / Cellulose acetate butyrate multicomponent blend fiber. Spinning temperature: 250°C; spinneret: 36×0.3mm; cooling condition: medium ring blowing; winding speed: 500m / min. The cellulose acetate butyrate in the multi-component blended fiber is dissolved in acetone to obtain polyethylene terephthalate micro / nano fiber assembly, and the diameter range of the nano fiber is 50-500nm observed by a scanning electron microscope. The prepared polyethylene terephthalate micro / nano fiber aggregates are collected, opened and carded to form a fluffy fiber web, and reinforced by spunlace to obtain polyethylene terephthalate micro / nano fiber nonwoven materials . The process conditions of spunlace are: the hole diameter of the water spray plate is 0.0...

Embodiment 2

[0025] 1800 grams of cellulose acetate butyrate and 200 grams of polyethylene terephthalate are dried in an oven, and the two are blended and then melt-spun and wound on a twin-screw spinning machine to obtain polyethylene terephthalate / Cellulose acetate butyrate multicomponent blend fiber. Spinning temperature: 260°C; spinneret: 36×0.3mm; cooling condition: medium ring blowing; winding speed: 800m / min. The cellulose acetate butyrate in the multi-component blended fiber is dissolved in acetone to obtain a polyethylene terephthalate continuous micro / nano fiber assembly, and the diameter range of the nano fiber is 50-500nm observed by a scanning electron microscope. The prepared polyethylene terephthalate micro / nano fiber aggregates are collected, opened and carded to form a fluffy fiber web, and reinforced by spunlace to obtain polyethylene terephthalate micro / nano fiber nonwoven materials . The process conditions of spunlace are: the hole diameter of the water spray plate ...

Embodiment 3

[0027] 1400 grams of cellulose acetate butyrate and 600 grams of polyethylene terephthalate are dried in an oven, and the two are blended, melt-spun and wound on a twin-screw spinning machine to obtain polyethylene terephthalate / Cellulose acetate butyrate multicomponent blend fiber. Spinning temperature: 250°C; spinneret: 20×0.2mm; cooling condition: strong ring blowing; winding speed: 300m / min. The cellulose acetate butyrate in the multi-component blended fiber is dissolved in acetone to obtain polyethylene terephthalate micro / nano fiber assembly, and the diameter range of the nano fiber is 50-500nm observed by a scanning electron microscope. The prepared polyethylene terephthalate micro / nano fiber aggregates are collected, loosened and carded to form a fluffy fiber web, and strengthened by hydroentanglement to obtain a polyethylene terephthalate micro / nano fiber nonwoven material. The process conditions of spunlace are: the hole diameter of the water spray plate is 0.08mm...

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Abstract

The invention relates to a preparation method of polyolefin micro / nano fiber non-woven material. The preparation method comprises the procedures that (1) high polymer and cellulose ester are mixed in the mass ratio of 1:2.3 to 20; then the high polymer and the cellulose ester undergo the process of melt spinning by a double-screw extruder; and the high polymer and the cellulose ester are winded at the winding speed of 300 to 800m / min to form the multi-component fiber of the polyester / cellulose ester that is scattered at a micro / nano scale in a cellulose ester substrate; (2) the cellulose ester in the multi-component fiber of polyester / cellulose ester is removed by acetone solution to acquire the micro / nano fiber aggregate of the high polymer with continuous thermo-plasticity; the fiber aggregate is carded by a carding machine; a net is crosswise made to form a fluffy fiber net; and after being strengthened and molded by aqua tex, pinpricking or thermo-compression, the non-weaving material is made. The preparation method has the characteristics that the method is efficient, controllable and environment-friendly and has high added value. In addition, the preparation method facilitates mass-production and the acquired polyolefin micro / nano fiber non-woven material non-weaving material has an outstanding effect on filtration absorption.

Description

technical field [0001] The invention belongs to the field of preparation of nonwoven materials, in particular to a preparation method of polyester micro / nano fiber nonwoven materials. Background technique [0002] Among the many new chemical fiber products, microfiber products are popular in the international market due to their unique properties. Major companies in the world are competing to develop and launch new products. The market for microfibers is increasingly optimistic. At the same time, microfibers have been successfully applied to non-woven material products, which has greatly improved the quality of non-woven materials and expanded the application fields of non-woven materials. Non-woven materials made of superfine fibers have the following characteristics: ① small fiber diameter, small bending stiffness, and extremely soft hand feeling; ② large specific surface area of ​​fibers, enhanced adsorption, improved detergency, and strong cleaning and filtering function...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D10/00D04H1/46D01F8/02D01F8/14D04H1/4258D04H1/435D04H1/492
Inventor 王华平肖茹顾莉琴廖申扬
Owner DONGHUA UNIV
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