CN110682375A - Direct veneering process for melamine impregnated bond paper - Google Patents

Abstract

The invention discloses a direct veneering process of melamine impregnated bond paper, which comprises the steps of sticking the melamine impregnated bond paper on the front and back surfaces of a ecological plate, then putting the ecological plate into a hot press for hot pressing, wherein the direct-sticking hot pressing pressure of the hot press is 5-12 Map, the direct-sticking hot pressing temperature is 120-130 ℃, and the direct-sticking hot pressing time is 420-600 seconds; and (3) maintaining the pressure after the direct bonding hot pressing is finished, wherein the pressure maintaining value of the hot press is adjusted to 0-5 Map, the pressure maintaining temperature is 120-130 ℃, and the pressure maintaining time is 60-120 seconds. The invention strictly controls the hot pressing pressure, the hot pressing temperature and the hot pressing time, and then carries out pressure maintaining treatment after the hot pressing is finished, thereby solving the problems of dry and wet patterns, surface pores, bright quantity, bubbling, layering, no demoulding, cracking and the like after the surface is pasted, and improving the appearance quality of the ecological plate.

Description

Direct veneering process for melamine impregnated bond paper

Technical Field

The invention relates to the field of building materials, in particular to a melamine impregnated bond paper direct veneering process.

Background

The ecological board is a decorative board formed by paving melamine impregnated bond paper with different colors or textures on the surfaces of a shaving board, a damp-proof board, a medium-density fiberboard, a plywood, a laminated wood board or other hard fiberboard and performing hot pressing. It is often used for indoor building and decoration of various furniture and cupboards. Some panels, walls, cabinets, cabinet laminates, etc.

The melamine impregnated bond paper veneering comprises a direct veneering and a compound veneering, wherein the direct veneering refers to a process of directly pasting the melamine impregnated bond paper on a board blank of the ecological board, and the compound veneering refers to a process of firstly pasting the melamine impregnated bond paper on a poplar skin and then pasting the poplar board on the board blank. However, the traditional melamine impregnated bond paper has poor appearance quality after being directly pasted, and is easy to have the problems of dry flower, wet flower, surface pore, bright amount, bubbling, layering, no demoulding, plate warping, cracking, no wear resistance, no pollution resistance, no scratch resistance, no sun resistance, no steam resistance and the like.

Disclosure of Invention

In view of the above, the invention provides a melamine impregnated bond paper straight veneering process, which solves the problems of dry flowers, wet flowers, surface pores, brightness, bubbling, layering, no demoulding, plate warping, cracking, no wear resistance, no pollution resistance, no scratch resistance, no sun resistance, no steam resistance and the like after veneering.

On one hand, the invention provides a melamine impregnated bond paper direct veneering process, which comprises the following steps:

step 1: scraping putty on the surface of the poplar: after the process of sticking the poplar bark on the ecological board by using the glue is finished, putting the board blank stuck with the poplar bark into a putty scraper for putty scraping, and adjusting the color of putty according to the color of the poplar bark, wherein the thickness of the putty takes the color of the poplar bark as a standard;

step 2: sanding the poplar surface: put into the grinder with the poplar face after scraping greasy completion and sand light, according to blank thickness adjustment grinder, the used abrasive band of sand light is 180 meshes or 240 meshes, sand light hourly speed: 75-100 m/min;

and step 3: edge sawing: placing the plate blank after the sanding of the poplar surface into an edge sawing machine for edge sawing operation;

and 4, step 4: hot pressing and directly pasting: adhering the melamine impregnated bond paper on the front and back surfaces of the ecological plate, and then putting the ecological plate into a hot press for hot pressing, wherein the direct adhering hot pressing pressure of the hot press is 5-12 Map, the direct adhering hot pressing temperature is 120-130 ℃, and the direct adhering hot pressing time is 420-600 seconds; and (3) maintaining the pressure after the direct bonding hot pressing is finished, wherein the pressure maintaining value of the hot press is adjusted to 0-5 Map, the pressure maintaining temperature is 120-130 ℃, and the pressure maintaining time is 60-120 seconds.

Compared with the prior art, the melamine impregnated bond paper direct veneering process has the beneficial effects that:

the problems of dry flower, wet flower, surface pore, brightness, bubbling, layering, no demoulding, cracking and the like after veneering are solved, and the appearance quality of the ecological plate is improved.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The phenomenon of dry flower after the traditional melamine impregnated bond paper is directly pasted on the surface is that opaque white flower spots exist on the surface of a product, and is mainly caused by insufficient fluidity or insufficient flowing time of the bond. The phenomenon of wet-flower is also called water stain, which means that the surface of a product has fog-like marks, and the main reasons are that external water is brought to a plate, the content of urea glue is too high, and the opacity of the cured urea glue is similar to 'wet-flower'. The phenomena of surface pores and bright stars mean pinhole-like defects on the surface of a product, and the main reasons are caused by insufficient fluidity of glue and the penetration of urea glue to the surface. The phenomena of bubbling and layering refer to abnormal bulges on the surface of a product caused by gas contained in the product, and the separation phenomenon of the adhesive film paper and an ecological plate or the adhesive film paper is seriously caused, and the main reason is the phenomenon of plate explosion caused by overhigh hot pressing temperature and overlong time. The phenomenon of no demoulding refers to that the product is partially or completely adhered to a steel plate in the hot pressing process, and the reasons are short hot pressing time, incomplete resin curing due to low temperature or partial low temperature of a hot pressing plate, overhigh water content of a plate blank, overlarge gluing amount of glue film paper, overhigh volatile matter, unclean steel plate surface and the like. The cracking phenomenon refers to the generation of reticular or linear fine cracks on the surface of a product, and the main principle is that the structural deformation of the adhesive film paper glue after solidification is too small to cause mismatching with the expansion with heat and contraction with cold of a plate blank, cracks are easily generated after cooling, the closing speed of a hot press is too high, and the impact force on the adhesive film paper is large.

In order to solve the problems, the invention provides a melamine impregnated bond paper direct veneering process which comprises the following steps:

step 1: scraping putty on the surface of the poplar: after the process of sticking the poplar bark on the ecological board by using the glue is finished, putting the board blank stuck with the poplar bark into a putty scraper for putty scraping, and adjusting the color of putty according to the color of the poplar bark, wherein the thickness of the putty takes the color of the poplar bark as a standard;

step 2: sanding the poplar surface: put into the grinder with the poplar face after scraping greasy completion and sand light, according to blank thickness adjustment grinder, the used abrasive band of sand light is 180 meshes or 240 meshes, sand light hourly speed: 75-100 m/min;

and step 3: edge sawing: placing the plate blank after the sanding of the poplar surface into an edge sawing machine for edge sawing operation;

and 4, step 4: hot pressing and directly pasting: adhering melamine impregnated bond paper on the front side and the back side of the ecological plate, and then putting the ecological plate into a hot press for hot pressing, wherein the direct adhering hot pressing pressure of the hot press is 5-12 Map, the direct adhering hot pressing temperature is 120-130 ℃, and the direct adhering hot pressing time is 420-600 seconds; after the direct bonding hot pressing is finished, pressure maintaining is carried out, the pressure maintaining value of the hot press is adjusted to 0-5 Map, the pressure maintaining temperature is 120-130 ℃, and the pressure maintaining time is 60-120 seconds;

the invention strictly controls the hot pressing pressure, the hot pressing temperature and the hot pressing time, and then carries out pressure maintaining treatment after the hot pressing is finished, thereby solving the problems of dry and wet patterns, surface pores, bright quantity, bubbling, layering, no demoulding, cracking and the like after the surface is pasted, and improving the appearance quality of the ecological plate.

The techniques not described above are common general knowledge of the skilled person. The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (1)

1. A melamine impregnated bond paper direct veneering process comprises the following steps:

step 1: scraping putty on the surface of the poplar: after the process of sticking the poplar bark on the ecological board by using the glue is finished, putting the board blank stuck with the poplar bark into a putty scraper for putty scraping, and adjusting the color of putty according to the color of the poplar bark, wherein the thickness of the putty takes the color of the poplar bark as a standard;

step 2: sanding the poplar surface: put into the grinder with the poplar face after scraping greasy completion and sand light, according to blank thickness adjustment grinder, the used abrasive band of sand light is 180 meshes or 240 meshes, sand light hourly speed: 75-100 m/min;

and step 3: edge sawing: placing the plate blank after the sanding of the poplar surface into an edge sawing machine for edge sawing operation;

and 4, step 4: hot pressing and directly pasting: adhering the melamine impregnated bond paper on the front and back surfaces of the ecological plate, and then putting the ecological plate into a hot press for hot pressing, wherein the direct adhering hot pressing pressure of the hot press is 5-12 Map, the direct adhering hot pressing temperature is 120-130 ℃, and the direct adhering hot pressing time is 420-600 seconds; and (3) maintaining the pressure after the direct bonding hot pressing is finished, wherein the pressure maintaining value of the hot press is adjusted to 0-5 Map, the pressure maintaining temperature is 120-130 ℃, and the pressure maintaining time is 60-120 seconds.