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

A non-woven material, nanofiber technology, applied in non-woven fabrics, cellulose/protein conjugated rayon, fiber processing and other directions, can solve the instability of post-drawing process control, fiber fineness limitation, difficult to adapt to large Large-scale production and other problems, to achieve the effect of significant filtration and adsorption effect, high added value, and easy to achieve large-scale production.

Inactive Publication Date: 2010-12-08
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: "fixed island" and "indeterminate island". "Indeterminate island" type is difficult to find a suitable polymer pair, such as polyolefin has not yet found a suitable polymer pair
The most commonly used methods in direct spinning are electrospinning and melt blowing, but the efficiency of electrospinning is low, and it is mainly for solution systems; while melt blowing only obtains fibers of micron and ultramicron sizes, etc.
The above-mentioned problems have greatly affected the research and development of polyolefin ultrafine fiber nonwoven materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1,950 grams of cellulose acetate butyrate and 50 grams of polypropylene were dried in an oven. After the two were blended, they were melt-spun and wound on a twin-screw spinning machine to obtain polypropylene / cellulose acetate butyrate multi-component blended fibers. Spinning temperature: 230°C; spinneret: 36×0.3mm; cooling condition: strong ring blowing; winding speed: 1200m / min. The cellulose acetate butyrate in the multi-component blended fiber is dissolved in acetone to obtain a polypropylene micro / nano fiber assembly, and the diameter range of the nano fiber is 50-500nm as observed by a scanning electron microscope. The prepared polypropylene micro / nano fiber aggregates are collected, opened and carded to form a fluffy fiber web, and reinforced by spunlace to obtain a polyethylene micro / nano fiber nonwoven material.

Embodiment 2

[0029] 1,800 grams of cellulose acetate butyrate and 200 grams of polyethylene were dried in an oven, and the two were blended, melt-spun and wound on a twin-screw spinning machine to obtain polyethylene / cellulose acetate butyrate multi-component blended fibers. Spinning temperature: 240°C; spinneret: 20×0.2mm; cooling condition: strong ring blowing; winding speed: 500m / min. The cellulose acetate butyrate in the multi-component blended fiber is dissolved in acetone to obtain a polyethylene micro / nano fiber assembly, and the diameter range of the nano fiber is 50-500nm as observed by a scanning electron microscope. The prepared polyethylene micro / nano fiber aggregates are collected, opened and carded to form a fluffy fiber web, and reinforced by spunlace to obtain a polyethylene micro / nano fiber nonwoven material.

Embodiment 3

[0031] 1,600 grams of cellulose acetate butyrate and 400 grams of polypropylene were dried in an oven. After the two were blended, they were melt spun and wound on a twin-screw spinning machine to obtain polypropylene / cellulose acetate butyrate multicomponent blended fibers. Spinning temperature: 250°C; spinneret: 36×0.3mm; cooling condition: strong ring blowing; winding speed: 400m / min. The cellulose acetate butyrate in the multi-component blended fiber is dissolved in acetone to obtain a polypropylene micro / nano fiber assembly, and the diameter range of the nano fiber is 50-500nm as observed by a scanning electron microscope. The prepared polypropylene micro / nano fiber aggregates are collected, opened and carded to form a fluffy fiber web, and the fluffy fiber web is reinforced by hydroentanglement to obtain a polyolefin micro / nano fiber nonwoven material.

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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) 50 to 800g of high polyme and 1200 to 1950g of cellulose ester are dried in an oven and mixed; 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 1200m / min to form the multi-component fiber of the polyolefin / cellulose ester that is scattered at a micro / nano scale in a cellulose ester substrate; (2) the multi-component fiber is melted in acetone solution; and cellulose ester is removed to acquire the micro / nano fiber aggregate of the high polymer with thermo-plasticity; and (3) 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, 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.

Description

technical field [0001] The invention belongs to the field of preparation of nonwoven materials, in particular to a preparation method of polyolefin 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, and their market 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 ultrafine fibers have the following characteristics: ①The bending stiffness of the fiber is very small, and the hand feels very soft; ②The specific surface area of ​​the fiber is large, the adsorption property is enhanced, the detergency is improved, and it has a strong ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/06D01F8/02D04H1/4291D01D5/08D04H1/4258D01D10/00D04H1/46
Inventor 肖茹王华平顾莉琴曹振博
Owner DONGHUA UNIV
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