Composite formaldehyde scavenger and preparation method thereof, method for removing formaldehyde from wood-based panels, and wood-based panels

Abstract

The invention relates to the technical field of removing formaldehyde from boards, and discloses a composite formaldehyde scavenger comprising the following components: MOFs, modified starch, fluorinated polyether, xanthan gum, ethylene urea, epoxy fatty acid methyl ester and deionized water . The invention also provides a preparation method of the composite formaldehyde scavenger. The invention also provides a method for removing aldehydes from wood-based panels: mixing a compound formaldehyde scavenger in the adhesive; hot-pressing the veneer paper soaked in the mixed adhesive on the surface of the core board; and heat-treating the veneer wood-based panel. The invention can continuously absorb and remove the formaldehyde and VOC released from the wood-based panel, provides a formaldehyde-free wood-based panel, and avoids formaldehyde pollution and harm to users.

Description

Technical field [0001] The present invention relates to the field of sheet formaldehyde removal technology, in particular, to a composite formaldehyde trap and a preparation method thereof, a wood-based panel aldehyde removal method and a wood-based panel. Background [0002] Formaldehyde, also known as formicaldehyde, is a colorless irritating gas that has a strong stimulating effect on the human eye and nose. Wood-based panels are panels or molded products made of wood or other non-wood plants as components, separated into various unit materials by certain mechanical processing, and glued with adhesives and other additives; Now the general adhesive used in the processing of wood-based panels is urea-formaldehyde resin adhesive, which will slowly release formaldehyde, VOCs and other harmful substances after processing, in order to meet environmental health requirements, it is necessary to remove formaldehyde and VOCs during processing. [0003] At present, in the process of proc...

AI Technical Summary

Problems solved by technology

[0003] At present, in the process of processing wood-based panels, formaldehyde and VOC are usually removed by heating to release formaldehyde and VOC from the wood-based panels and then adsorb or decompose them to remove them. After formaldehyde escapes from the adhesive, it will pass through the core board or veneer materials and then release. In the air, during this process, formaldehyde is easily adsorbed inside the core board or on the veneer material again, making it difficult to capture and remove formaldehyde, so that after the processing is completed, there will still be some formaldehyde and VOC that have not been released. Wood-based panels will continue to release formaldehyde and VOC during use, which will cause serious harm to users

[0004] In the prior art, there is a method of capturing and removing the formaldehyde released by the adhesive by using a formaldehyde scavenger mixed in the adhesive, so that the formaldehyde can be removed directly after escaping, without further processing of the core board and veneer materials, and formaldehyde can be avoided. Adsorption on the core board and veneer materials; but the formaldehyde capture agent mixed in the adhesive will reduce the bonding strength of the adhesive, and the amount of formaldehyde capture is limited

Images