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Production method of paper pulp molded product

A pulp molding and production method technology, applied in paper, papermaking, textiles and papermaking, etc., can solve the problems of easy moisture absorption, rough surface, easy to fall off powder, etc., and achieve the effect of not easy to absorb moisture and fall off powder

Inactive Publication Date: 2016-08-31
DONGGUAN DANGNA PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned pulp molded products have a rough surface, are easy to absorb water, and are prone to powder dropping under normal use conditions, which limits their use in high-end electronic products and other fields.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1, dilute the crushed and screened plant fibers into a slurry solution, add a water-based acrylic resin solution with a concentration of 5‰ of the slurry solution and a concentration of 2%, and mix it in a mixer at a speed of 1000 rpm;

[0037] Step 2. Feed the well-mixed slurry into the material tank of the pulp molding machine, immerse the forming mold until the slurry is sucked under the liquid level for 5 seconds, remove the forming mold and continue dehydrating under negative pressure for 20 seconds to form Pulp molded wet paper blanks;

[0038] Step 3, spray polytetrafluoroethylene (Teflon) solution on the upper and lower mold surfaces of the heat-setting mold that has been processed. After heating to 160°C, transfer the wet paper base to the heat setting mold, and the clamping pressure is 100N / cm 2 Continue for 30 seconds to obtain a molded pulp dry base with a moisture content of 8%, and then cut off the flash by a cutting die to obtain a molded pulp produ...

Embodiment 2

[0041] Step 1, dilute the crushed and screened plant fibers into a slurry solution, add a water-based acrylic resin solution with a concentration of 4% in a slurry solution with a quality of 8‰, mix in a mixer and stir at a speed of 1400 rpm;

[0042] Step 2. Feed the well-mixed slurry into the material tank of the pulp molding machine, immerse the forming mold until the slurry is sucked under the liquid level for 5 seconds, remove the forming mold and continue dehydrating under negative pressure for 20 seconds to form Pulp molded wet paper blanks;

[0043] Step 3, spray polytetrafluoroethylene (Teflon) solution on the upper and lower mold surfaces of the heat-setting mold that has been processed. After heating to 170°C, transfer the wet paper base to the heat setting mold, and the clamping pressure is 100N / cm 2 Continue for 30 seconds to obtain a molded pulp dry base with a moisture content of 8%, and then cut off the flash by a cutting die to obtain a molded pulp product. ...

Embodiment 3

[0046] Step 1, dilute the crushed and screened plant fibers into a slurry solution, add a water-based acrylic resin solution with a concentration of 6% in a mass of 10‰ of the slurry solution, mix in a mixer and stir at a speed of 1800 rpm;

[0047] Step 2. Feed the well-mixed slurry into the material tank of the pulp molding machine, immerse the forming mold until the slurry is sucked under the liquid level for 5 seconds, remove the forming mold and continue dehydrating under negative pressure for 20 seconds to form Pulp molded wet paper blanks;

[0048] Step 3, spray polytetrafluoroethylene (Teflon) solution on the upper and lower mold surfaces of the heat-setting mold that has been processed. After heating to 180°C, transfer the wet paper base to the heat setting mold, and the clamping pressure is 100N / cm 2 Continue for 30 seconds to obtain a molded pulp dry base with a moisture content of 8%, and then cut off the flash by a cutting die to obtain a molded pulp product.

...

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Abstract

The invention provides a production method of a paper pulp molded product with the smooth surface. The production method includes the following steps that 1, after paper pulp fibers, water and a polyacrylamide resin solution are mixed and stirred, pulp is obtained; 2, under the negative pressure condition, the pulp is sucked and dewatered, and a paper pulp molded wet blank with the water content being 60%-70% is obtained; 3, the paper pulp molded wet blank with the water content being 60%-70% is subjected to heat setting, and a paper pulp molded dry blank with the water content of 6%-10% is obtained. The production method has the advantages that the pulp is sucked and dewatered under the negative pressure condition, polyacrylamide reticular molecular structures in the pulp are centralized on the surface of the wet blank, a smooth film is formed on the surface of the pulp molded product after heat setting, and moisture absorption and powder falling are not likely to happen.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a production method of pulp molded products. Background technique [0002] Pulp molded products are made of plant fiber as the main raw material, added additives, molded by molding methods, and then dehydrated and dried into finished products. The production process is environmentally friendly, the use process is safe and non-toxic, and it is easy to recycle after use. It is a classic Green packaging products have been widely used at home and abroad in recent years. [0003] The invention patent with the application number 201410299892.X discloses a pulp molding production method, including steps: 1) crushing raw materials, removing sand, and grinding to obtain pulp fibers; 2) mixing binders, additives, and water Mix according to the weight ratio of 10~15:1:10~15 to make a paste; 3) add the pulp fiber and paste prepared above into a mixer for mixing; 4) cut the above...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21J5/00D21H17/37
CPCD21J5/00D21H17/37
Inventor 梁江卫
Owner DONGGUAN DANGNA PRINTING CO LTD
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