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Straw-replaced wood packing material and preparation method thereof

A technology of wood packaging and straw, which is applied in the direction of wood processing equipment, pretreatment of molding materials, flat products, etc., can solve problems such as difficulty in forming, hindering urea-formaldehyde resin bonding, and low tensile strength, and achieve the effect of reducing production costs

Inactive Publication Date: 2016-11-09
SUZHOU DINGLI PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tests have proved that due to the smooth waxy layer of straw raw materials (such as wheat straw, rice straw, etc.) particles, the friction between particles is small, it is extremely difficult for traditional adhesives to penetrate into the particles of the board, and it is difficult to form a "glue" during the gluing process. Nails", so the planar tensile strength of the board is extremely small
At the same time, the high content of silica in the raw materials will also hinder the gluing of the urea-formaldehyde resin to the straw. Even if the amount of sizing is increased, the gluing performance of the board often cannot meet the requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A straw-based wood substitute packaging material, the components and the mass parts of each component are as follows: 100 parts of straw, 15 parts of starch, 2 parts of vinyl acetate-ethylene copolymer emulsion, 3 parts of paraffin, 1 part of lysine diisocyanate, 1 part of dilauryl thiodipropionate, 2 parts of polyamide fiber.

[0023] The preparation method comprises the steps of:

[0024] 1) Crush the straw, add a sodium hydroxide solution with a mass concentration of 8% for pretreatment for 4 hours, and then dry until the moisture content does not exceed 15%;

[0025] 2) Mix starch, vinyl acetate-ethylene copolymer emulsion, lysine diisocyanate and dilauryl thiodipropionate evenly to obtain an adhesive;

[0026] 3) Add the adhesive in step 2) to the straw in step 1), add paraffin and polyamide fiber and keep stirring until the glue is in full and uniform contact with the straw scraps, then dry until the moisture content is 25%, and take it out;

[0027] 4) Hot pres...

Embodiment 2

[0029] A straw-based wood substitute packaging material, the components and the parts by mass of each component are as follows: 100 parts of straw, 30 parts of starch, 8 parts of vinyl acetate-ethylene copolymer emulsion, 10 parts of paraffin, 4 parts of lysine diisocyanate, 3 parts of dilauryl thiodipropionate, 6 parts of polyamide fiber.

[0030] The preparation method comprises the steps of:

[0031] 1) Crush the straw, add a sodium hydroxide solution with a mass concentration of 8% for pretreatment for 4 hours, and then dry until the moisture content does not exceed 15%;

[0032] 2) Mix starch, vinyl acetate-ethylene copolymer emulsion, lysine diisocyanate and dilauryl thiodipropionate evenly to obtain an adhesive;

[0033] 3) Add the adhesive in step 2) to the straw in step 1), add paraffin and polyamide fiber and keep stirring until the glue is in full and uniform contact with the straw scraps, then dry until the moisture content is 25%, and take it out;

[0034] 4) Ho...

Embodiment 3

[0036] A straw-based wood substitute packaging material, the components and the mass parts of each component are as follows: 100 parts of straw, 20 parts of starch, 3 parts of vinyl acetate-ethylene copolymer emulsion, 5 parts of paraffin, 2 parts of lysine diisocyanate, 1.2 parts of dilauryl thiodipropionate, 3 parts of polyamide fiber.

[0037] The preparation method comprises the steps of:

[0038] 1) Crush the straw, add a sodium hydroxide solution with a mass concentration of 8% for pretreatment for 4 hours, and then dry until the moisture content does not exceed 15%;

[0039] 2) Mix starch, vinyl acetate-ethylene copolymer emulsion, lysine diisocyanate and dilauryl thiodipropionate evenly to obtain an adhesive;

[0040] 3) Add the adhesive in step 2) to the straw in step 1), add paraffin and polyamide fiber and keep stirring until the glue is in full and uniform contact with the straw scraps, then dry until the moisture content is 25%, and take it out;

[0041] 4) Hot ...

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PUM

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Abstract

The invention discloses a straw-replaced wood packing material and a preparation method thereof. The material comprises the following components in parts by mass: 100 parts of straws, 15-30 parts of starch, 2-8 parts of vinyl acetate-ethylene copolymer emulsion, 3-10 parts of paraffin, 1-4 parts of lysine-di-isocyanate, 1-3 parts of dilauryl thiodipropionate, and 2-6 parts of polyphthalimide fibers. The agricultural waste straws are used as main materials; the starch is added as adhesive; the materials are laid on a mold for hot pressing to finally mold a plate; such harmful substances as formaldehyde are not released, so that the manufactured packing material is safe and environment-friendly, and can replace wood packages; the production cost can be reduced; and such wastes as crop straw materials are fully used.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a straw-like wood-substituting packaging material and a preparation method thereof. Background technique [0002] my country is a Shaolin country. The excessive harvesting and unreasonable consumption of timber stock, per capita timber consumption, and per capita forest resources have made my country face a forest resource crisis. Faced with such a situation, in addition to vigorously building plantations and efficiently utilizing existing forest resources, it is an undisputed choice to actively expand alternative raw materials that do not rely on wood resources to produce wood-based panels to alleviate the crisis of forest resources. Our country has proposed measures such as "replacing wood with steel" and "replacing wood with plastic", which have played a certain role in alleviating the contradiction between supply and demand of wood, but from the curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N1/02B27N3/08
CPCB27N1/0209B27N3/08
Inventor 顾建芳
Owner SUZHOU DINGLI PACKAGING
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