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Process for quickly laminating veneers of formaldehyde-free wood-plastic composite plates

A composite board and composite slab technology, which is applied in the jointing of wooden veneers, wood processing equipment, manufacturing tools, etc., can solve the problems of long hot pressing time, secondary pollution of free formaldehyde, carbonization of veneered thin wood, etc., and achieve Improve surface bonding strength, solve formaldehyde release, and reduce production cost

Active Publication Date: 2014-01-29
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional process of veneer veneer, aldehyde resin glue is widely used as the bonding material, which may easily cause quality defects such as glue penetration, bubbling, and cracking of the secondary veneer of wood-plastic composite boards, reduce the product qualification rate, and increase production costs. And cause secondary pollution of free formaldehyde in materials
[0003] The current technology mainly involves the surface decoration process and method of environmentally friendly wood-plastic composite plywood. The traditional technology mainly focuses on the surface finishing of composite boards. This process limits the application field of wood-plastic composite plywood as high-grade indoor and furniture materials; One process is to form the veneer veneer and the base material of wood-plastic composite plywood by one-time hot pressing. Due to the high hot pressing temperature (up to 160-180 °C), the hot pressing time is longer (generally 16mm thick slab heating time is about 16 minutes), it is easy to cause carbonization and discoloration of veneer veneer, and affect the surface decoration quality of wood-plastic composite plywood

Method used

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  • Process for quickly laminating veneers of formaldehyde-free wood-plastic composite plates

Examples

Experimental program
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Effect test

Embodiment 1

[0016] 1) Blank assembly: from top to bottom: veneer, polyethylene plastic film, base material, polyethylene plastic film, balance layer blank assembly to obtain a composite slab; the water content of the veneer is 8%; the thickness of the veneer The polyethylene plastic film is prefabricated on the market; the substrate is an environmentally friendly wood-plastic composite plywood with a flat surface, the thickness deviation is 0.1mm, and the water content is 8%; the balance layer is veneer.

[0017] 2) Hot pressing: Place the 3mm thick rubber cushion, aluminum alloy plate, and composite slab from top to bottom for hot pressing; temperature 160°C, pressure 0.8MPa, time 2min;

[0018] 3) Cool for 2 minutes while maintaining the pressure to solidify the plastic film;

[0019] 4) Chen Fang, trimming treatment.

Embodiment 2

[0021] 1) Blank assembly: from top to bottom: veneer, plastic, base material, plastic, and balance layer to form a composite slab; the moisture content of the veneer is 12%; the thickness of the veneer is 1.4mm; Bottom, that is, the side facing the plastic is processed by rolling holes, the size of the holes is 0.5-1mm, the distribution is irregular, and the number of holes is 25 / cm 2 The plastic is a polyethylene plastic film processed from waste plastic; the base material is an environmentally friendly wood-plastic composite plywood with a flat surface, the thickness deviation is 0.2mm, and the water content is 9%; the balance layer is paper;

[0022] 2) Hot pressing: Place the 3mm thick rubber cushion, aluminum alloy plate, and composite slab from top to bottom for hot pressing; temperature 180°C, pressure 0.6MPa, time 1min;

[0023] 3) Cool for 3 minutes while maintaining the pressure to solidify the plastic film;

[0024] 4) Aging, edge trimming.

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Abstract

The invention relates to a process for quickly laminating veneers of formaldehyde-free single plates / plastic composite plates. The process includes that prefabricated formed polypropylene plastic films are used as veneering adhesion materials. The process has the advantages that shortcomings of glue penetration, blister, glue failure and the like which are easy to occur when liquid adhesive is used for veneering in the traditional process can be overcome, surface quality shortcomings such as discoloration of veneers formed during wood-plastic composite plate veneering and composite plate manufacturing can be overcome, and the environmental protection performance of the decorative wood-plastic composite plates and the optimal decorative performance of the veneers can be maintained.

Description

technical field [0001] The invention relates to the technical field of secondary processing of the surface of wood-based panels, in particular to a novel and environmentally friendly wood-plastic composite plywood surface decoration process and method. Background technique [0002] There are a large number of plywood made of adhesives at home and abroad, and the products have different degrees of free formaldehyde, which pollutes the environment. However, the research on the production process of plywood composited with wood veneer and plastic film in recent years shows that the surface of the veneer has not been perforated, and its products can only meet the requirements of the national standard class II plywood (GB / T 17657-1999). And rolling a certain number of pores on the glued surface of the veneer, replacing the aldehyde adhesive with polyethylene plastic film, and the wood-plastic composite plywood prepared according to the conventional plywood production method, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/08B27D1/04B32B21/08
Inventor 叶翠仙唐兴平林祥江徐志杰林俊峰
Owner FUJIAN AGRI & FORESTRY UNIV
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