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Preparation method of plant straw plate

A plant straw and straw board technology, which is applied in flat products, household components, applications, etc., can solve the problems of complex production process, high cost, and low utilization rate of raw materials, and achieve the effect of improving internal bonding strength and strong hydrolysis resistance

Inactive Publication Date: 2015-07-29
CHANGCHUN YINGLONG MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Combining the current straw board production technologies launched in the international and domestic markets, there are deficiencies in high cost, complex production process, and low raw material utilization rate, which make it difficult to form industrialized and large-scale production of corn straw board

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] Example 1 Take 100g of dry corn stalks with a water content of 5-10%, cut them into 0.2-5.0mm, pre-mix, spray 5.0g of adhesive evenly on the raw material of the straw, and then spread it with polytetrafluoroethylene Vinyl film is paved on a single-layer hot press machine, the paving thickness is 36mm, and the initial filling thickness is 6 times the thickness of the final product; then it is molded under the conditions of temperature 160°C, hot pressing time 4min, and pressure 3.0MPa. Obtained straw board product A 1 ;

[0012] The adhesive used is a one-component adhesive composed of isocyanate and polyether polyol reacted with a catalyst. The preparation method is as follows: the isocyanate used is diphenylmethane diisocyanate (MDI) or polymethylene polyphenyl Based polyisocyanate (PAPI), the polyether polyol used is one of polyoxypropylene diol, polyoxypropylene triol and polytetrahydrofuran diol, the mass ratio of the two is 100:20, the reaction temperature is 60 ...

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PUM

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Abstract

The invention provides a preparation method of a plant straw plate. The preparation method takes full components of dried corn straws, rice straws, wheat straws, sunflower straws, rapeseed straws and cotton straws as raw materials and utilizes a special adhesive of polyether polyol and a prepolymer of isocyanate, so that the water-resisting capability is strong, and the inner bonding intensity of a product is improved; the related indexes of the produced plant straw plate are equal to or better than quality standards of national standards (GB / T4897-92) of a wood artificial plate. The indexes including the inner bonding intensity, the static bending strength, the formaldehyde releasing amount, the water absorption thickness expansion rate and the like. The production process is simplified and the production cost is reduced.

Description

technical field [0001] The invention relates to a method for preparing straw boards by utilizing crop straws. It belongs to the field of new building materials and biomass comprehensive utilization. Background technique [0002] Straw-based panels have already been produced, such as corn straw panels, straw panels, and wheat straw panels. Chinese patent (CN87103594) relates to the production technology and process of corn stalk board, which is characterized in that corn stalks are crushed and air-selected, and the materials with a fiber length of less than 25mm are selected to be dried and sent to the glue mixer to be bonded with urea-formaldehyde resin. Mixture mixing, paving pre-pressing, hot pressing molding. The internal bonding strength of the board prepared by this method is not enough, and the quality of the board is poor. [0003] In order to improve the quality of straw slabs, cornstalk husks are used both internationally and domestically to produce homogeneous s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/02B27N3/08C09J175/08C08G18/48C08G18/16
CPCB27N3/02B27N3/002B27N3/08C08G18/16C08G18/48C09J175/08
Inventor 张龙王仲举崔瑛娜
Owner CHANGCHUN YINGLONG MATERIAL TECH CO LTD
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