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Preparation method of water-soluble polyvinyl alcohol fiber wet non-woven fabrics

A polyvinyl alcohol fiber, wet-laid non-woven technology, applied in fiber raw material processing, synthetic cellulose/non-cellulose material pulp/paper, textiles and papermaking, etc., can solve the problem of poor softness and water-soluble non-woven fabrics Hardness, low production efficiency and other problems, to achieve the effect of good uniformity of the fiber web

Active Publication Date: 2013-09-04
YONGAN BAOHUALIN IND DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water-soluble non-woven fabric produced by dry-laid-chemical bonding has a hard hand and poor softness, which limits its application in medical and other disposable sanitary cloths, although this method has less investment in production equipment
However, the production efficiency is low, the production capacity is small, the processing cost is high, and the competitive advantage is not obvious
However, although the hardness and softness of the water-soluble non-woven fabric processed by spunlace are improved, the equipment price is high and the production cost is high, which is not conducive to popularization and application.

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

specific Embodiment approach

[0014] A method for preparing water-soluble polyvinyl alcohol fiber wet-laid non-woven fabric, comprising the following steps: (1) preparation of water-soluble polyvinyl alcohol fiber suspension slurry: water-soluble polyethylene with different dissolution temperature Wtb and crystallinity Xcf in water The alcohol fibers are respectively put into the beating barrel with a rotor agitator, and the water-soluble polyvinyl alcohol fibers are disentangled by a strong water flow, respectively configured into a mixed slurry with a fiber concentration of 1% to 10%, and then pumped by a slurry pump Form different fiber suspensions in the prepared storage tank; (2) Proportional deployment: two or more fiber suspensions are sent to the mixing tank in proportion by slurry pumping, and the mixed The fiber suspension slurry is diluted to 0.01%~0.1%; (3) Wet inclined wire forming: the prepared suspension slurry with a concentration of 0.01%~0.1% flows into the headbox through the central pulp...

Embodiment 1

[0021] Water-soluble polyvinyl alcohol fiber A with a water dissolution temperature Wtb of 90°C and a crystallinity Xcf of 65% and water-soluble polyvinyl alcohol fiber B with a water dissolution temperature of Wtb 70°C and a crystallinity Xcf of 45% were respectively put into a water tank In the beating tank, prepare a mixed pulp with a fiber concentration of 2%, and send it into the storage tank with a slurry pump and dilute it to a fiber suspension slurry with a concentration of 1% at the same time; :B=9:1 Use a slurry pump to send it into the mixing tank and dilute to a concentration of 0.03%. The suspension in the mixing tank with an online concentration of 0.03% passes through the central pulp distributor and enters the headbox for dehydration into a web. The pulp-net speed ratio is controlled at 0.64; the formed fiber web enters the dryer in the first zone for dehydration. The temperature of the drying cylinder in the first zone is set at 65°C. When the fiber web enters...

Embodiment 2

[0023] Water-soluble polyvinyl alcohol fiber A with a dissolution temperature Wtb of 70°C in water and a crystallinity Xcf of 55% and water-soluble polyvinyl alcohol fiber B with a dissolution temperature Wtb of 60°C in water and a crystallinity Xcf of 40% were respectively put into a water-based container. In the beating tank, prepare a mixed pulp with a fiber concentration of 2%, and send it into the storage tank with a slurry pump and dilute it to a fiber suspension slurry with a concentration of 1% at the same time; :B=9:1 Send it into the mixing tank with a slurry pump, and dilute to a concentration of 0.04%; the suspension in the mixing tank with an online concentration of 0.03% passes through the central pulp distributor and enters the headbox for dehydration into a net , the pulp-to-net speed ratio is controlled at 0.84; the formed fiber web enters the dryer in the first zone for dehydration, the temperature of the dryer in the first zone is set at 55°C, and the moistur...

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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Abstract

The invention discloses a preparation method of water-soluble polyvinyl alcohol fiber wet non-woven fabrics. The method comprises a step of water-soluble polyvinyl alcohol fiber suspension pulp preparation, a step of ratio blending, a step of wet slope screen shaping, a step of drying, and a step of rolling. The method allows the product fluffiness and the fiber web uniformity to be good, and the transverse and longitudinal tension of products to satisfy user requirements, and has a simple production technology.

Description

technical field [0001] The invention relates to the field of PVA fibers, in particular to a method for preparing water-soluble polyvinyl alcohol fiber wet-laid non-woven fabrics. Background technique [0002] Nonwovens are also known as nonwovens, nonwovens, nonwovens, nonwovens or nonwovens. Nonwoven technology is a material processing technology that originates from textiles but surpasses textiles. Different nonwoven process technologies have their own corresponding process principles. But from a macro point of view, the basic principles of non-woven technology are consistent, which can be described by its process, which can generally be divided into the following four processes: (1) fiber preparation; (2) web formation; (3) reinforcement; ( 4) Finishing. [0003] At present, the production methods of water-soluble polyvinyl alcohol (PVA) fiber non-woven fabrics in China mainly include dry-laid-chemical bonding method and dry-laid-spunlace method. The water-soluble non...

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): D21H13/16D21F11/00
Inventor 邓忠华
Owner YONGAN BAOHUALIN IND DEV
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