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Reinforcement method for pulp molding product with PLA

A technology of pulp molding and molded products, which is applied in the direction of non-fiber pulp addition, synthetic cellulose/non-cellulose material pulp/paper, paper, etc., which can solve the problems of insufficient product stiffness, low surface strength, lint and powder loss and other problems to achieve the effect of improving the appearance, increasing the tensile strength, and improving the stiffness

Active Publication Date: 2019-01-04
WING FAT (HENAN) MOLDED FIBER TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When pulp molded products replace traditional plastic packaging materials, it is a great progress in terms of environmental protection. However, compared with plastic materials, pulp molded products still have insufficient strength performance, such as not being as hard as plastic materials, and the product stiffness is not easy enough. Deformation, low surface strength lead to lint and powder loss, etc.

Method used

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  • Reinforcement method for pulp molding product with PLA
  • Reinforcement method for pulp molding product with PLA
  • Reinforcement method for pulp molding product with PLA

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The present invention provides such figure 1 A kind of pulp molded article reinforcing method of adding PLA shown, described specific steps are as follows:

[0029] Step 1: Material selection, choose the raw material of molded products, the raw material is wood pulp or bamboo pulp, choose PLA fiber similar to the shape of papermaking fiber, the fiber length is 1-5mm, and the melting point is about 170 ℃, which can ensure the production process of pulp molded products Among them, PLA can be well retained, select cellulose, and the cellulose is one or more of polyvinyl alcohol, carboxymethyl cellulose, hydroxypropyl methyl cellulose and cellulose ether;

[0030] Step 2: pulping, pulping and dispersing the PLA fiber, cellulose and molding product raw materials together, and then refining it through a refiner to make a slurry that can be used for molding production. The cellulose is dissolved in water to form a viscous solution. The mucilage sticks the PLA fiber and the ra...

Embodiment 2

[0038] Different from Example 1, step 6 can also produce pulp molded products first according to the normal process requirements, and then add an additional hot-melt step, that is, put the pulp molded products into the hot pressing mold again, and heat to 170- Take it out after 180°C and maintain it for 10-20 seconds to achieve the purpose of melting and re-solidifying the PLA.

Embodiment 3

[0041] The present invention provides such figure 1 A kind of pulp molded article reinforcing method of adding PLA shown, described specific steps are as follows:

[0042] Step 1: Material selection, choose the raw material of molded products, the raw material is wood pulp or bamboo pulp, choose PLA fiber similar to the shape of papermaking fiber, the fiber length is 1-5mm, and the melting point is about 170 ℃, which can ensure the production process of pulp molded products Among them, PLA can be well retained, select cellulose, and the cellulose is one or more of polyvinyl alcohol, carboxymethyl cellulose, hydroxypropyl methyl cellulose and cellulose ether;

[0043]Step 2: pulping, pulping and dispersing the PLA fiber, cellulose and molding product raw materials together, and then refining it through a refiner to make a slurry that can be used for molding production. The cellulose is dissolved in water to form a viscous solution. The mucilage sticks the PLA fiber and the raw...

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Abstract

The invention discloses a reinforcement method for a pulp molding product with PLA. The method comprises the specific steps of 1, material selection, wherein a molding product raw material is selected, the raw material is wood pulp or bamboo pulp, a PLA fiber similar to a papermaking fiber in form is selected, the length of the fiber is 1-5 mm, the melting point is about 170 DEG C, and cellulose is selected and is one or more of polyvinyl alcohol, carboxymethyl cellulose, hydroxypropyl methyl cellulose and cellulose ether; 2, pulping, wherein the PLA fiber, the cellulose and the molding product raw material are pulped and dispersed. According to the reinforcement method, by adding the PLA fiber and the cellulose, the characteristics that the pulp molding product is degradable and recyclable are not changed, the strength performance, such as tensile strength, tensile energy absorption and bursting strength, of the pulp molding product is improved, and the buffer protection effect is improved; the stiffness of the pulp molding product is improved, size deformation of the product is reduced, the interlayer bonding force and the surface strength of the pulp molding product are improved, and linting and dusting are relieved.

Description

technical field [0001] The invention relates to the field of pulp molded product reinforcement methods, in particular to a pulp molded product reinforcement method with PLA added. Background technique [0002] Pulp molding uses waste paper, bamboo pulp, sugarcane pulp, wood pulp and other plant fibers as raw materials, and uses molds to filter and form the plant fibers in the slurry state to make wet blanks, and then heat-press to make finished products; this technology Without any adhesive, it can be made into paper products with complex shapes and high dimensional accuracy requirements. It is a technology to obtain ideal packaging materials. The product can be completely degraded after being used and discarded. It has many advantages such as environmental protection, degradability, and recycling. It has become an emerging environmentally friendly packaging material. [0003] When pulp molded products replace traditional plastic packaging materials, it is a huge improvemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/24D21H17/25D21J5/00
CPCD21H13/24D21H17/25D21J5/00
Inventor 左华伟陈俊忠劳国强刘思琪董奇心李炳霈王文强陈松林杨小龙
Owner WING FAT (HENAN) MOLDED FIBER TECH DEV CO LTD
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