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One-time formed methanal-free compound panel and processing technique

A processing technology and a technology for composite boards, applied in wood processing equipment, lamination devices, lamination, etc., can solve the problems of the decline in the online pass rate of the boards and the increase in production costs, and achieve excellent surface quality, improved screw holding force, and equipment simple effect

Inactive Publication Date: 2014-08-13
富朗投资管理集团(香港)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure that the surface quality of the board meets this requirement, relatively small raw materials are used to make the board during the production process. However, in order to make the board strength index (especially MOR / MOE) meet the relevant national standards, only further increasing the density of the board will lead to The online pass rate of the company has decreased, and the production cost has further increased

Method used

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  • One-time formed methanal-free compound panel and processing technique
  • One-time formed methanal-free compound panel and processing technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Formaldehyde-free wheat straw board composite board formed at one time

[0039] (1) Preparation of materials:

[0040] Wheat straw (origin: Cao County, Shandong) is crushed by a crushing device (screen with 7mm square holes) to obtain wheat straw raw materials for the production of one-time formaldehyde-free composite boards, and the moisture content of the raw materials is 12.6%.

[0041] The bottom and surface wood veneers are 2mm thick fast-growing poplar veneers (origin: Caoxian, Shandong), and the moisture content of the veneers is 25%.

[0042] (2) Glue sizing: in a mixer, atomize isocyanate (pMDI) adhesive and mix evenly with wheat straw raw materials, the glue amount is 4% of the dry weight of wheat straw raw materials; spray glue on one side of poplar veneer surface , the amount of spray glue is 15g / m 2 . The adhesive used was Huntsman Suprasec 5005.

[0043] (3) Paving preload:

[0044] To manufacture 18mm thick wheat straw composite board, take ...

Embodiment 2

[0054] Example 2: Formaldehyde-free wheat straw board composite board formed at one time

[0055] (1) Material preparation:

[0056] Wheat straw (origin: Cao County, Shandong) is crushed by a crushing device (screen with 7mm square holes) to obtain wheat straw raw materials for the production of formaldehyde-free composite boards. The moisture content of the raw materials is 11.2%.

[0057] The bottom and surface wood veneers are 1.7mm thick fast-growing eucalyptus veneers (origin: Nanning, Guangxi), and the moisture content of the veneers is 19%.

[0058] (2) Glue sizing: in a mixer, atomize isocyanate (pMDI) adhesive and mix evenly with wheat straw raw materials, the amount of glue is 3.7% of the dry weight of wheat straw raw materials; eucalyptus veneer surface single-sided spray glue , the amount of spray glue is 20g / m 2 . The adhesive used was Huntsman Suprasec 5005.

[0059] (3) Pavement preloading:

[0060] To manufacture wheat straw composite panels with a thickne...

Embodiment 3

[0073] Example 3: Formaldehyde-free corn stalk board composite board formed at one time

[0074] (1) Preparation of materials:

[0075] Corn stalks (origin: Shuangcheng, Heilongjiang) were crushed by a crushing device (screen with 7mm round holes) to obtain corn stalk raw materials for the production of formaldehyde-free composite panels with a moisture content of 13.6%.

[0076] The bottom and surface wood veneers are 1.7mm thick fast-growing eucalyptus veneers (origin: Nanning, Guangxi), and the moisture content of the veneers is 19%.

[0077] (2) Glue sizing: In a mixer, atomize the isocyanate (pMDI) adhesive and mix it evenly with the corn stalk raw material, the glue amount is 3.0% of the absolute dry weight of the corn stalk raw material; spray glue on one side of the eucalyptus veneer surface , the amount of spray glue is 20g / m 2 . The adhesive used was Huntsman Suprasec 5005.

[0078] (3) Pavement preloading:

[0079] To manufacture corn stalk composite panels wit...

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Abstract

The invention relates to a one-time formed methanal-free compound panel and a processing technique. The one-time formed methanal-free compound panel is characterized in that wood veneers are arranged on a bottom layer and a surface layer of the panel; a homogeneous crop straw layer or homogeneous forestry waste biomass layer is arranged as a middle layer; the bottom layer, the surface layer and the middle layer are at a time pressed and formed. According to the one-time formed methanal-free compound panel and the processing technique, three layers of structures are at a time pressed and formed, so that the space between every two layers is more compact and the layering phenomenon is difficult to occur. The processing technique is simpler.

Description

Technical field: [0001] The invention relates to a board manufactured by one-time molding with crop straw, formaldehyde-free adhesive and wood veneer as raw materials and a production process flow for manufacturing the board, which belongs to the technical field of wood-based boards. Background technique: [0002] As a by-product of agricultural production, crop straw is "inexhaustible and inexhaustible" and has high cellulose and lignin content. The use of crop straw to make wood-based panels has developed rapidly in China in recent years. [0003] Most of the current crop straw boards belong to the straw particle board category. Its product structure and production process are similar to those of wood particle board, but there are still many deficiencies in product quality, which largely restrict the development, promotion and application of crop straw board. [0004] At present, the types of crop straw boards that use pure crop straw as raw materials can be divided into ...

Claims

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Application Information

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IPC IPC(8): B27N3/02B27N3/08B32B21/12B32B37/06B32B37/10B32B37/12
Inventor 夏定权薛村禾
Owner 富朗投资管理集团(香港)有限公司
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