Method for producing aldehyde-free by wood

Abstract

A technology for preparing the non-aldehyde plywood without release of free form-aldehyde includes such steps as preparing adhesive, pouring it on a coating machine, coating the adhesive on the surface of veneers, criss-cross overlaying, cold pressing, hot pressing, curing and removing residual edges.

Description

technical field [0001] The invention relates to a production technology of decoration materials and building material plywood, in particular to a production method of formaldehyde-free plywood without free formaldehyde release. Background technique [0002] With the improvement of people's living standards, people have put forward higher requirements for the decoration of their residences, offices, activities and other places, not only requiring beautiful, trendy, natural and concise, but also requiring health and environmental protection. As one of the most common decoration and building materials, plywood is widely used in the market. Most of the formaldehyde emission of common plywood on the market can meet the national standard requirements (in 2001, the state issued the "Formaldehyde Release Limits in Interior Decoration Materials Wood-based Panels and Their Products" GB 18580-2001, and the release of free formaldehyde is ≤ 1.5mg / L, can be directly used indoors, decora...

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Problems solved by technology

Most of the formaldehyde emission of common plywood on the market can meet the national standard requirements (in 2001, the state issued the "Formaldehyde Release Limits in Interior Decoration Materials Wood-based Panels and Their Products" GB 18580-2001, and the release of free formaldehyde is ≤ 1.5mg / L, can be directly used indoors, decoration materials with free formaldehyde emission ≤ 5.0mg / L must be finished before being used indoors), but there is still a small amount of harmful release problem, home, office, activity and other places The decoration materials or supplies used, such as floors, furniture, wallpapers, ceilings, wooden doors and windows, paints, etc., although the release of harmful substances from each product can meet the national standard requirements, but several decoration materials are used together in the same space. The harmful substances released together will greatly exceed the national standard, which will seriously threaten the health of the people

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