Method for making formaldehyde-free high-strength artificial plate

A manufacturing method and technology of wood-based panels, applied in the direction of manufacturing tools, flat products, pretreatment of molding materials, etc., can solve the problems of poor bonding effect of straw, loose structure, volatilization of formaldehyde, etc., and achieve wide application and finished products The structure is compact and meticulous, and the effect of avoiding pollution

Inactive Publication Date: 2003-12-10
SHANGHAI COMPAK ENVIRONMENTAL PROTECTION EQUIP CO LTD
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Problems solved by technology

[0003] The invention provides a method for manufacturing formaldehyde-free high-strength wood-based panels, which solves the technical problems of poor bonding effect, loose structure, low strength and formaldehyde volatilization of crop straws

Method used

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  • Method for making formaldehyde-free high-strength artificial plate

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Embodiment Construction

[0015] Combine now figure 1 The present invention will be described in detail.

[0016] The raw materials used in the present invention are discarded agricultural crop stalks in rural areas, such as wheat straw, corn stalks (including corn cobs after grain removal), sorghum stalks, rice stalks, etc., which are compressed and bundled for storage after collection. The bundled stalks are sent to the coarse crusher by the conveyor for coarse crushing, and the coarsely crushed stalks are sent to the dryer through the conveyor for drying until the moisture content is within the range of 11% to 17%. The dried straw material is sent to the homogenizer by a conveyor for mixing, and then goes through a magnetic separation to remove impurities such as iron and stones, and then enters a fine grinder to be crushed to a size of 0.1-6mm, and then is sent to the grading machine by an air conveyor. The sieve is sorted by size, and the dust is removed, and sent to the silo. The crushed straw ...

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Abstract

The production method of formol-free high-strength artificial plate includes the following steps: firstly, pulverizing crop straw and stalk into 0.1-6 mm, adding MDI adhesive, stirring and mixing them, making the uniformly-mixed raw material into plate blank, prepressing and forming under the condition of 300-400 k N / sq.M, then thermosetting at 140-200 deg.C and 2500-3500 kN / sq.M, cooling, edging and polishing so as to obtain the invented artificial plate.

Description

Technical field: [0001] The invention relates to an artificial board, in particular to a method for manufacturing a formaldehyde-free high-strength artificial board using crop stalks as raw materials. Background technique: [0002] The current wood-based panels basically use wood, such as plywood, fiberboard, particleboard, blockboard, wood wool board and wood laminated materials. Because wood needs to be cut down to replace forests, as the forest area shrinks day by day, the ecological environment of the earth is seriously damaged, which in turn affects human beings themselves. For this reason, people are looking for other natural fiber materials to replace wood to make fiberboards. The most typical one is the Canadian patent CA1179108, which introduces a method for using the waste part of crops—wheat straw to make packaging boards. Wheat straws of different lengths are mixed with about 11% of binder, and cured at a pressure of 80 tons per square meter and a temperature of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N1/00B27N3/00B27N3/02B27N3/08
Inventor 龚挺
Owner SHANGHAI COMPAK ENVIRONMENTAL PROTECTION EQUIP CO LTD
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