Method for manufacturing spun-bonded water-soluble polyvinyl alcohol nonwovens

A technology of polyvinyl alcohol and non-woven fabrics, applied in the field of non-woven fabrics, can solve the problems of environmental pollution and application range limitations of chemicals, and achieve the effects of being beneficial to environmental protection and having a wide range of water-soluble temperatures

Inactive Publication Date: 2008-01-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are non-woven fabrics made of fibers in the world. For example, Chinese patent 96109434.6 introduces a water-soluble non-woven fabric made of cellulose fibers, which can meet water at room temperature after alkalization and etherification. However, because it can be dissolved in cold water, the scope of application is limited. At the same time, the nonwoven fabric is treated with alkalization and etherification, and the chemicals used will cause serious pollution to the environment.
[0004] At present, there are no patents and research reports on the production of water-soluble nonwoven fabrics by spunbonding using thermoplastic polyvinyl alcohol polymers as raw materials in China.

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

[0027] Pre-crystallize polyvinyl alcohol particles with a degree of polymerization of 1700 and a degree of alcoholysis of 89 at 80°C for 8 hours, and dry them under vacuum at 85°C for 24 hours to make the water content of the particles less than 5×10 -5 .

[0028] The dried polyvinyl alcohol particles are placed in a screw extruder for melt spinning, the spinning temperature is 195°C, 18020 holes are used, and the spinneret with a hole diameter of 0.35mm forms a spinneret with a total length of 3730mm Components are used for spinning, the spinning pump is 70cc, the rotating speed is 25 rpm, and the obtained polyvinyl alcohol as-spun fibers are stretched under positive pressure, the pressure of compressed air is 0.15MPa, and the stretching speed is 4000m / min .

[0029] Pass the stretched polyvinyl alcohol filaments through the wire-forming device, and when the moving speed is 130m / min, it will get 20g / m 2 The fiber mesh with a door width of 3.5m.

[0030] Then the obtained p...

Embodiment 2

[0032] Pre-crystallize polyvinyl alcohol particles with a degree of polymerization of 1200 and a degree of alcoholysis of 89 at 80°C for 8 hours, and dry them under vacuum at 85°C for 24 hours to make the water content of the particles less than 5×10 -5 . Melt spinning was carried out in the same apparatus as above, the spinning temperature was 210° C., the rotation speed of the metering pump was 0.25 MPa, and the stretching speed was 3000 m / min. When the moving speed is 90m / min, you will get 40g / m 2 The fiber mesh with a door width of 3.5m.

[0033] Then the obtained polyvinyl alcohol web is pressed by a hot roll at 130°C, the pressure is 60KG, thermally bonded, and finally crimped to obtain a water-soluble temperature of 80°C, a longitudinal tensile strength of 90N / 5cm, and an elongation of 20 %, the transverse tensile strength is 62N / 5cm, the elongation is 28%, and the polyvinyl alcohol nonwoven fabric with uniform fiber distribution.

Embodiment 3

[0035] Pre-crystallize polyvinyl alcohol particles with a degree of polymerization of 1000 and a degree of alcoholysis of 88 at 80°C for 8 hours, and dry them under vacuum at 85°C for 24 hours to make the water content of the particles less than 5×10 -5 .

[0036] Melt spinning was carried out in the same apparatus as above, the spinning temperature was 220° C., the pressure of compressed air was 0.4 MPa, and the drawing speed was 2000 m / min. When the moving speed is 60m / min, it will get 60g / m 2 The fiber mesh with a door width of 3.5m.

[0037] Then the obtained polyvinyl alcohol web is pressed by a hot roll at 140°C, the pressure is 60KG, thermally bonded, and finally crimped to obtain a water-soluble temperature of 70°C, a longitudinal tensile strength of 125N / 5cm, and an elongation of 40 %, a transverse tensile strength of 100N / 5cm, an elongation of 50%, and a polyvinyl alcohol nonwoven fabric with uniform fiber distribution.

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Abstract

The invention relates to spunbonded water solubility polyvinyl alcohol nonwovens manufacturing method. It uses thermal plasticity polyvinyl alcohol particle with 500-2000 polymerization degree, 88-99 alcoholysis degree as material, spunbonded method to make the nonwovens by drying, high speed spinning, mesh placement, hot rolling binding. Thus the invention has the advantages of simple device, short technical process, fine fiber, green, suiting for applying in coloring bag, operating coat etc.

Description

technical field [0001] The invention belongs to the field of nonwoven fabrics, in particular to a preparation method of water-soluble polyvinyl alcohol nonwoven fabrics. Background technique [0002] There are many types of non-woven fabrics. Most methods such as acupuncture, spunlace, chemical bonding, and hot-rolled bonding require fibers to be processed into non-woven fabrics. The products are generally thicker, while the spunbond method is simple to process and can produce A relatively thin product. Nonwovens produced by spunbonding can be widely used in disposable products and medical and health fields. [0003] At present, there are non-woven fabrics made of fibers in the world. For example, Chinese patent 96109434.6 introduces a water-soluble non-woven fabric made of cellulose fibers, which can meet water at room temperature after alkalization and etherification. However, because it can be dissolved in cold water, the scope of application is limited. At the same tim...

Claims

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/14D01F6/14D04H3/007
Inventor 邵娟靳向煜
Owner DONGHUA UNIV
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