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1. Technical Introduction
Decorative film paper produced using the melamine-formaldehyde (MF) glue and melamine-modified urea-formaldehyde (MUF) glue dipping process not only releases free formaldehyde, but is also very brittle. When used to finish plywood and blockboard, the surface is prone to cracking.
This technology has developed a low-viscosity, low-molecular-weight, small-particle-size, thermosetting, formaldehyde-free polymer adhesive. This adhesive is used for the first impregnation stage of decorative paper, while conventional MF adhesive is used for the second. After conventional impregnation, drying, and hot-pressing lamination processes, low-formaldehyde decorative film paper finishes the wood-based panels. This low-formaldehyde decorative film paper produced by this technology emits low free formaldehyde and exhibits a certain degree of flexibility. The resulting wood-based panels possess physical strength properties approaching those of MF-faced panels.
2. Technical Features
(1) This technology significantly reduces the use of traditional triamine glue and urea-formaldehyde glue, and to a certain extent solves the problem of free formaldehyde emission from wood-based panel decorative paper, achieving low formaldehyde content in decorative paper. The formaldehyde emission of low-formaldehyde decorative adhesive film paper prepared by this technology can reach the F**** standard.
(2) The surface bonding strength and wear resistance of the low-formaldehyde decorative paper veneer artificial board produced by this technology are close to those of the triamine adhesive decorative paper veneer board. At the same time, it gives the decorative paper a certain degree of flexibility, solving the current problem of surface cracking of veneer plywood and blockboard.
(3) The process and equipment conditions of the adhesive's impregnation, drying, and hot pressing finishing processes are compatible with existing decorative film paper production and application conditions, and can be produced under existing equipment and process conditions.
3. Technical indicators
The low-formaldehyde decorative film paper prepared by this technology has a formaldehyde emission of less than 0.3 mg/L and a surface bonding strength of more than 1 MPa. The veneered plywood has no cracks, bubbling, discoloration, etc. after resistant to cold and hot cycles, and its resistance to pollution corrosion, dry heat, cracking, and water vapor reaches level 5.
4. Market Prospects
This technology effectively addresses the production of low-formaldehyde decorative adhesive paper. While retaining the strength of traditional decorative paper, it also offers a degree of flexibility, effectively addressing the cracking issues associated with veneered plywood and blockboard. Furthermore, the improved processing properties of decorative adhesive paper allow for cross-coating, making it widely applicable in the processing of furniture, cabinets, doors, windows, and other wood products. The resulting industry has significant output value and a promising long-term market outlook.