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Intermediate and low density paperboard and papermold and making method thereof

A low-density, cardboard technology, used in textiles and papermaking, etc., can solve the problems of limited use of paper molds and high forming density, and achieve the effects of light weight, reduced product cost, and good elasticity.

Inactive Publication Date: 2005-05-18
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, due to the suction and adsorption molding, the pulp fibers adhere tightly to each other, so the molding density is relatively high, generally greater than 0.7 g / cm3, which limits the use range of the paper mold prepared by this molding method.

Method used

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  • Intermediate and low density paperboard and papermold and making method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1 5

[0022] 1. Raw material preparation Weigh according to the proportion of raw material components listed in the attached table and pour into the corresponding proportion of water.

[0023] 2. Slurry preparation Soak, beat, refine, remove impurities, and sieve the raw materials according to the conventional process to make free pulp of corresponding concentration.

[0024] 3. Dehydration press forming Add the prepared slurry into the forming mold (the inner mold filter adopts high temperature resistant metal mesh, nylon mesh or polyester mesh, and its pore size can be determined according to the requirements of the product, the concentration of the slurry, and the dehydration Comprehensive selection of pressing and drying process conditions), and then carry out self-weight dehydration, vacuum dehydration and press dehydration to form the slurry into cardboard and paper mold blanks; finally remove the outer mold and send it to dry.

[0025] 4. Drying and demoulding Put the cardboa...

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Abstract

The invention relates to a medium and low density cardboard, a paper mold and a preparation method thereof. The cardboard and paper mold are made by the easy-to-control process and conditions provided by the present invention, and the slurry prepared by the conventional process is made at one time. The thickness can be 4-18 mm, and the density is 0.2-0.7 g / cubic Centimeters, so that it has low cost, low density, good elasticity, and high strength. It can completely replace polystyrene foam materials, which is beneficial to environmental protection and human health. It is easy to recycle and regenerate, and has a wide range of applications.

Description

technical field [0001] The invention belongs to the technical field of light industry papermaking, and in particular relates to a medium and low density cardboard, a paper mold and a preparation method thereof. Background technique [0002] At present, the traditional papermaking process is used to make flat cardboard products made of wood pulp, cotton pulp, waste paper pulp or their mixed pulp, which can be used in various industries. As long as the thickness is greater than 2 mm, the density is 0.7-1.0 g / cubic cm or more. If it is used as a filling and packaging material, it will inevitably have defects such as high cost, high density, poor elasticity, high hardness, and narrow application range. Of course, it is not suitable for some special purposes, such as filtering products. [0003] The lightweight packaging and filling materials widely used in various industries, especially those with different geometric shapes or special three-dimensional shapes, are mostly expand...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21J3/00
Inventor 华坚王兴可冯边城沈予洪
Owner SICHUAN UNIV