Material and preparation method for granular filler paper pulp molded product

A technology of pulp molding and particle filler, applied in the direction of material mixture addition, plant raw material addition, natural cellulose pulp/paper, etc., can solve problems such as imperfect methods, and achieve the goal of promoting product transformation, promoting construction, and reducing environmental pollution Effect

Inactive Publication Date: 2019-10-15
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of my country's social economy and urbanization, the output and quantity of sewage and sludge are increasing, but how to better achieve the "four modernizations" related methods is still not perfect

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0036] A method for preparing a particle filler pulp molded product, comprising the steps of:

[0037] Step (1), soaking, crushing and washing the fibers to obtain fiber slurry;

[0038] Step (2), add biomass particles, sizing agent, reinforcing agent, dispersant, retention and drainage aid, defoamer to the pretreated fiber slurry, and mix under stirring or air explosion to make the slurry The material is uniform, and the slurry is prepared;

[0039] Step (3), absorbing the slurry through a mold, and then obtaining a biomass pulp molding wet body through vacuum filtration and compression molding;

[0040] Step (4), drying the pulp molded wet body or drying it naturally;

[0041] In step (5), molded products with a moisture content of 8-12% are made by hot-pressing shaping, cutting and other processes.

[0042] As a further improvement to the above solution, the defoamer is one or more of fatty acid amides, silicones, polyethers, and alcohols.

Embodiment 1

[0044] A method for preparing a novel pulp molded product with a granular filler, comprising the following steps:

[0045] Step (1), soaking, crushing and washing 98 parts of secondary fibers to obtain fiber slurry;

[0046] Step (2), adding 1 part of municipal sludge treated by wet oxidation method, 0.7 part of alkyl ketene dimer, 0.08 part of acrylonitrile, 0.15 part of polyethylene oxide, 0.01 part of acrylonitrile to the pretreated fiber slurry 1 part of polyethyleneimine, 0.06 part of isooctyl stearate, mixed under stirring or gas explosion, make the slurry uniform, and prepare the slurry;

[0047] The strengthening agent described here includes one or more of polyvinyl alcohol, acrylonitrile, acrylic acid, guar gum, polyamide epichlorohydrin, cellulose, polyamine, resin, dialdehyde starch combination.

[0048] Step (3), absorbing the slurry through a mold, and then obtaining a biomass pulp molding wet body through vacuum filtration and compression molding;

[0049] St...

Embodiment 2

[0054] A method for preparing a novel pulp molded product with a granular filler, comprising the following steps:

[0055] Step (1) Soak, crush and wash 38 parts of secondary fibers to obtain fiber slurry;

[0056] Step (2) Add 58 parts of municipal sludge treated by wet oxidation method, 2.1 parts of rosin gum, 0.8 parts of polyvinyl alcohol, 0.7 parts of carboxymethylcellulose sodium, 0.18 parts of shell to the pretreated fiber slurry Polysaccharide, 0.2 part of epoxy soybean, 0.02 part of silicone defoamer, mix under stirring or air explosion to make the slurry uniform, and prepare a slurry with a concentration of 5%; step (3) absorb the slurry through the mold, and then Biomass pulp molding wet blank is obtained by vacuum filtration and compression molding;

[0057] Step (4) drying the pulp molded wet body or drying it naturally;

[0058] In step (5), molded products with a moisture content of 8 to 12% are made through processes such as hot-press shaping and cutting.

...

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PUM

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Abstract

The present invention relates to the field of paper pulp molded packaging products, and especially relates to a method for preparing a novel pulp molded product from a granular filler. The method comprises the following steps: uniform mixing of proper amounts of plant fibers, biomass particles, a sizing agent, a reinforcing agent, a dispersant, a retention and drainage aid, a plasticizer, a defoaming agent and water, mold adsorption, vacuum suction filtration, compression molding, drying or natural drying, hot pressing shaping, and cutting for producing the molded product having a moisture content of 8-12%. The pulp molded product prepared in the invention can reduce the dosage of the plant fibers by up to 60%, has a higher physical strength than conventional pulp molded products, can reduce the use of forest resources, is economical and environmentally friendly, and can be reused or naturally degraded and returns to soil after being used.

Description

technical field [0001] The invention relates to the field of pulp molded packaging products, in particular to a method for preparing novel pulp molded products with granular fillers. Background technique [0002] In recent years, environmental protection has been deeply rooted in the hearts of the people, forest resources are in short supply, pulp prices are unstable, and the development of new materials to replace fibers has received more and more attention. [0003] With the rapid development of my country's social economy and urbanization, the output and quantity of sewage and sludge are constantly increasing. However, how to better achieve the "four modernizations" related methods is still not perfect. Therefore, the efficient and effective treatment and disposal of sludge and the proper resource utilization of treated sludge are the focus of attention of the government, industry and people. [0004] Pulp molded products are used as packaging materials for paper product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21J5/00D21H11/00D21H21/16D21H21/18D21H21/10D21H21/12D21H21/08D21H21/14D21H11/12D21H11/14D21H17/02
CPCD21H11/00D21H11/12D21H11/14D21H17/02D21H17/72D21H21/08D21H21/10D21H21/12D21H21/14D21H21/16D21H21/18D21J5/00
Inventor 孙昊王婷婷高鑫宇卢莉璟卫灵君胡雁龙
Owner JIANGNAN UNIV
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