Method for manufacturing composite floor with low formaldehyde emission through heat treatment

Abstract

The invention discloses a method for manufacturing a composite floor with low formaldehyde emission through heat treatment, which comprises the steps of: placing a semi-finished composite floor prepared by adopting a formaldehyde adhesive into a heat treatment box chamber, keeping the composite floor in the heat treatment box chamber for 8-96h at 60-110 DEG C, taking out of the composite floor, ageing the composite floor for 3-10 days in a natural environment, and carrying out the processes of groove and tongue processing, coating, packaging and the like to prepare the composite floor with low formaldehyde emission. The method is a formaldehyde reducing technology which has good formaldehyde reducing effect and does not affect the physical properties of a product, has the characteristics of less investment, simple production control and less environment pollution, and can be applied to the field of the production of laminated floors, solid wood composite floors and furniture to obtain remarkable economic benefits.

Description

technical field [0001] The invention relates to a formaldehyde degradation technology adopted for semi-finished compound floor products manufactured by using formaldehyde adhesives and having been veneered and shaped and cut into certain specifications. Background technique [0002] At present, more than 90% of the composite floors at home and abroad are made of formaldehyde-based adhesives. Therefore, no matter what formaldehyde reduction measures are taken, the final product will always release free formaldehyde, which will have varying degrees of impact on indoor air quality. . For the formed composite floor, to reduce its formaldehyde emission or to improve the environmental protection level, the coating method, sealing method or aging method are generally used. The coating method is to apply a chemical substance that can chemically react with formaldehyde and decompose it on the surface of the floor. When the formaldehyde inside the floor migrates or diffuses to the su...

AI Technical Summary

Problems solved by technology

The coating method is to apply a chemical substance that can chemically react with formaldehyde and decompose it on the surface of the floor. When the formaldehyde inside the floor migrates or diffuses to the surface, it is captured by the coating agent and degraded. The surface of floor products is dense, and it is difficult for the coating agent to penetrate into the interior of the floor to capture free formaldehyde, so its effect is limited to the surface effect. It can be as long as 5 to 15 years, so the effect of this technology on reducing aldehydes is very limited

The sealing method is to coat part of the surface of the formed floor with wax, paint, adhesive and other materials to seal the free formaldehyde inside the floor and slow down the release rate of formaldehyde. This method is simple and effective, but it is difficult to implement, especially It is difficult to seal the sawn section when paving the floor room, and the sealing material itself will produce a large number of microscopic channels as time and environmental conditions change, so the long-term effect is difficult to maintain

The aging method is to store the finished floor products for a long time, so that the free formaldehyde in the floor will naturally degrade with the extension of time and the change of temperature and humidity. This method has the advantage of not requiring material input, but due to the low ambient temperature under natural conditions, the kinetic energy of formaldehyde molecules Insufficient, unable to effectively overcome the adsorption energy and difficult to degrade naturally in a short period of time, which is intolerable to floor producers and consumers

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