CN114481702B

CN114481702B - Paper and board with multi-layer gum dipping

Info

Publication number: CN114481702B
Application number: CN202210116018.2A
Authority: CN
Inventors: 吴建荣; 张允好; 叶家杰
Original assignee: Guangdong Locka Furniture Ltd
Current assignee: Guangdong Locka Furniture Ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2023-04-28
Anticipated expiration: 2042-01-28
Also published as: CN114481702A

Abstract

The application relates to multi-layer impregnated paper and board. The multi-layer impregnated paper described herein includes: a gummed paper substrate layer; polishing the upper surface of the gummed paper substrate layer to form a burr surface on the surface; uniformly coating ecological glue on the burr surface; the gummed paper substrate layer covered with the ecological glue is dried for the first time, and the drying temperature is less than 100 ℃; cooling the gummed paper substrate layer to room temperature after the first drying, so that the upper surface of the gummed paper substrate layer is covered with a firm glue solution coating; spraying formaldehyde adsorbent on the surface of the glue solution coating; uniformly coating ecological glue on the glue solution layer, and performing secondary drying, wherein the drying temperature is less than 90 ℃; and (5) after the second drying, carrying out ventilation cooling on the gummed paper base layer, and cooling to room temperature. The multi-layer impregnated paper and the multi-layer impregnated board have the advantage of reducing volatilization and diffusion of substances such as formaldehyde.

Description

Paper and board with multi-layer gum dipping

Technical Field

The present disclosure relates to gummed papers and boards, and more particularly to multi-layer gummed papers and boards.

Background

The traditional board coated with gummed paper has the problems that substances such as formaldehyde exist in the board or the artificial composite board due to the existence of materials such as glue solution or interfacial agent in the processing process, and the consumption will be influenced for consumers. Therefore, in the prior art, from the viewpoint of removing aldehyde, it is mainly solved by adding an aldehyde removing agent during processing, or by surface-treating a plate material with an aldehyde removing agent after processing is completed. In any way, the problems of high cost and complex process exist, so that the aldehyde removal becomes difficult, and the wide application is not facilitated.

Disclosure of Invention

Based on this, it is an object of the present application to provide multi-layer impregnated papers and boards which have the advantage of reduced formaldehyde removal costs.

In one aspect of the present application, there is provided a multi-ply gummed paper comprising a gummed paper substrate layer;

polishing the upper surface of the gummed paper substrate layer to form a burr surface on the surface;

uniformly coating ecological glue on the burr surface;

the gummed paper substrate layer covered with the ecological glue is dried for the first time, and the drying temperature is less than 100 ℃;

cooling the gummed paper substrate layer to room temperature after the first drying, so that the upper surface of the gummed paper substrate layer is covered with a firm glue solution coating;

spraying formaldehyde adsorbent on the surface of the glue solution coating;

uniformly coating ecological glue on the glue solution layer, and performing secondary drying, wherein the drying temperature is less than 90 ℃;

and (5) after the second drying, carrying out ventilation cooling on the gummed paper base layer, and cooling to room temperature.

The utility model provides a multilayer gummed paper is through coating and forming the glue solution coating on gummed paper substrate layer to follow-up laminating paper on panel, and be convenient for follow-up other operations of carrying on.

Further, a plurality of micro-holes are formed in the glue solution coating, and the aperture is smaller than 3mm.

Further, the gummed paper base layer is formed by compounding a plurality of layers of gummed paper.

Further, after the second drying, spraying formaldehyde adsorbent on the surface of the glue solution coating.

In another aspect of the application, a board with a multi-layer impregnated paper is provided, including a base plate, the multi-layer impregnated paper according to any one of the above schemes, and a film cover layer;

respectively bonding the multi-layer impregnated paper on the upper surface and the lower surface of the bottom plate through hot pressing; and the side with the glue solution coating faces to the outside of the bottom plate;

coating ecological glue on the glue solution coating, so that liquid ecological glue is coated on the surface of the glue solution coating and in the micro-circular holes;

spreading and flattening the film covering layer, and tightly covering the spread film covering layer on the glue solution coating with the liquid ecological glue;

flattening the film coating layer by a roller while gradually covering the film coating layer on the glue solution coating layer, so that the film coating layer is tightly covered on the glue solution coating layer;

obtaining the film-coated plate body.

Further, placing the film-coated plate body in a dry environment for airing, wherein the humidity requirement is 45% -65%; airing the board for not less than 24 hours; and (5) preparing the film-coated dry plate.

Further, the four sides of the bottom plate are stuck with edge banding strips on the corresponding sides of the bottom plate through edge banding machines;

when the edge bonding machine works, an aldehyde removing agent is added into the glue solution.

Further, the film cover layer is a plastic film layer.

Further, printing is performed on the surface of the thin film cover layer by using a high-speed ink-jet printer so as to form a pattern cover layer on the thin film cover layer.

Further, the ecological glue is MDI glue.

For a better understanding and implementation, the present application is described in detail below with reference to the drawings.

Drawings

FIG. 1 is a cross-sectional view of an exemplary sheet material having multiple layers of gum-dipped paper of the present application;

fig. 2 is a schematic perspective view of a molded product of a sheet material having a multi-layered gummed paper as an example of the present application.

Detailed Description

In the description of the present application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the drawings, a base plate 10, a gummed paper substrate layer 20, a glue coating 30, a film cover layer 40, a pattern cover layer 50 and a sealing strip 60.

Referring to fig. 1 and 2, an exemplary multi-layer impregnated paper of the present application includes an impregnated paper substrate layer;

uniformly coating ecological glue on the burr surface;

spraying formaldehyde adsorbent on the surface of the glue solution coating;

Polishing the gummed paper substrate layer to increase the roughness of the upper surface of the gummed paper substrate layer, so that the ecological glue can be adhered to the gummed paper substrate layer better; after the glue solution coating is formed, formaldehyde adsorbent is sprayed to remove formaldehyde volatilized from the glue dipped substrate layer. Drying the ecological glue after removing aldehyde to ensure that a stable glue solution coating structure is formed; and (5) coating ecological glue again, and drying again to further ensure the structural stability of the formed glue solution coating. So as to facilitate the subsequent covering of the film.

In some preferred embodiments, a plurality of micro-holes are formed in the glue solution coating, and the aperture is smaller than 3mm. The micro-circular holes are formed to increase the surface area and reduce bubbles in the subsequent film coverage when filling liquid glue. Further, a plurality of micro-holes are uniformly distributed. Furthermore, the depth of the micro-holes is smaller than the thickness of the glue solution coating, so that penetration of the glue dipping paper substrate layer is prevented when the micro-holes are formed.

In some preferred embodiments, the gum dipping paper base layer is formed by compounding a plurality of layers of gum paper. The impregnated paper substrate layer in the application can be one of the multi-layer impregnated papers in the prior art, or can be formed by gluing single-layer papers.

In some preferred embodiments, after the second drying, formaldehyde adsorbent is sprayed on the surface of the glue coating. After the second drying, further formaldehyde removal is carried out to further reduce the volatilized formaldehyde and remove the formaldehyde.

In some preferred examples, an aldehyde scavenger is mixed within the ecological glue to reduce the amount of volatilized formaldehyde.

With continued reference to fig. 1 and 2, an exemplary sheet material with multi-layer impregnated paper of the present application includes a base sheet, a multi-layer impregnated paper as described in any of the above schemes, and a film cover layer;

firstly, preparing the multi-layer impregnated paper in any of the above schemes;

obtaining the film-coated plate body.

In the application, after the paper with the multi-layer gum dipping is prepared, liquid ecological gum is coated on the gum solution coating so as to cover the film and play a role in reducing bubbles. In addition, in order to reduce the bubble when covering the film, set up a plurality of micro-holes on the glue solution coating, the ecological glue of coating in the micro-hole can break through big bubble, forms the tiny bubble, and ecological glue has fluidity, can flow into the tiny bubble, and then extrudes the bubble that probably forms, has further guaranteed the effect of hugging closely of film and glue solution coating. If the surface of the glue solution coating is smooth, the covering effect of the film after the glue solution coating is coated with ecological glue is poor, and compared with the glue solution coating with micro-holes in the application, the glue solution coating of the application is good in structure, can discharge bubbles more fully, and ensures the close-fitting effect of the film.

In the application, on one hand, the film and the glue solution coating are required to be covered densely, and the film is bubble-free or bubble-free and is closely attached; on the other hand, it is necessary to ensure that the film does not break. This can exert the greatest effect of the film. After the film is attached, a film covering layer is formed on the glue solution coating.

In some preferred embodiments, the film-coated plate body is placed in a dry environment for airing, and the humidity requirement is 45% -65%; airing the board for not less than 24 hours; and (5) preparing the film-coated dry plate. The drying treatment is to prevent the board from being wet, and the film is covered to affect the volatilization of water and the effect of the board, so that the board is dried before the film is covered, and the drying treatment is beneficial to the subsequent board finished product.

In some preferred embodiments, the edge banding strips are adhered to the corresponding side edges of the bottom plate by an edge banding machine for the four side edges of the bottom plate;

when the edge bonding machine works, an aldehyde removing agent is added into the glue solution. The edge banding strip is adhered to the side face of the bottom plate through the edge banding machine, so that the wrapping and sealing effects of the plate are improved.

In some preferred examples, the base sheet is an artificial composite sheet or an artificial synthetic sheet.

In some preferred embodiments, the film cover layer is a plastic film layer. The plastic film can be a PP plastic film, a PE plastic film or other plastic films. The plastic film layer is arranged to ensure the sealing effect of the plate and reduce the volatilization of harmful substances.

In some preferred embodiments, printing is performed on the surface of the thin film cover layer using a high speed ink jet printer to form a patterned cover layer on the thin film cover layer. The surface of the pattern cover layer can be solid color, or can be provided with a pattern or a pattern style.

Printing is carried out on the surface of the film covering layer, so that a pattern covering layer is formed, and the surface of the film has a good pattern. On one hand, the effect of the surface pattern and the color of the plate is ensured, and on the other hand, the film covering layer is well protected, so that the film covering layer is prevented from being damaged.

In some preferred embodiments, the ecological glue is MDI glue. The glue solution has the advantage of low formaldehyde content so as to ensure that the release amount of formaldehyde is small.

The preparation method of the board with the multilayer impregnated paper comprises the following steps:

firstly, preparing a plurality of layers of impregnated paper, and hot-pressing and attaching the paper on a bottom plate; then, coating ecological glue on the glue solution coating to ensure that the film is tightly adhered to the glue solution coating; finally, ink-jet printing is carried out on the film covering layer to form a pattern covering layer.

The board with the multilayer gum dipping paper disclosed by the application is provided with the film through coating, so that the release and volatilization of harmful substances in the bottom plate are prevented; the ecological glue reduces the release of formaldehyde; spraying aldehyde removing agent and adding aldehyde removing agent into the glue solution to comprehensively remove formaldehyde and other substances. Furthermore, the combination of multiple effects reduces the release amount of formaldehyde substances such as formaldehyde, and the release amount of formaldehyde is effectively reduced by more than 95% in unit time as found in test and detection results.

The board with the multilayer impregnated paper, which is exemplified by the application, has the advantages that the used ecological glue amount is small, a new formaldehyde remover is not required to be developed, the comprehensive cost is low, the processing cost of the whole board is controllable and not high in a controllable range, the formaldehyde release is reduced, the cost is controlled, and the board is suitable for industrialized popularization and use.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application.

Claims

1. A board having a plurality of layers of impregnated paper, characterized in that: comprises a bottom plate, a plurality of layers of impregnated paper and a film covering layer;

the multi-layer impregnated paper comprises an impregnated paper substrate layer;

uniformly coating ecological glue on the burr surface;

spraying formaldehyde adsorbent on the surface of the glue solution coating;

after the second drying, the gummed paper base layer is ventilated and cooled to room temperature;

a plurality of micro-holes are formed in the glue solution coating, and the aperture is smaller than 3mm;

obtaining the film-coated plate body.

2. The sheet with multi-layered gummed paper as set forth in claim 1, wherein: the gummed paper base layer is formed by compounding a plurality of layers of gummed paper.

3. The sheet with multi-layered gummed paper as set forth in claim 1, wherein: and after the second drying, spraying formaldehyde adsorbent on the surface of the glue solution coating.

4. The sheet with multi-layered gummed paper as set forth in claim 1, wherein: placing the film-coated plate body in a drying environment for airing, wherein the humidity requirement is 45% -65%; airing the board for not less than 24 hours; and (5) preparing the film-coated dry plate.

5. The sheet material with multi-layered gummed paper as set forth in claim 4, wherein: the four side edges of the bottom plate are stuck with edge banding strips on the corresponding side edges of the bottom plate through an edge banding machine;

6. The sheet with multi-layered gummed paper as set forth in claim 1, wherein: the film covering layer is a plastic film layer.

7. The sheet with multi-layered gummed paper as set forth in claim 1, wherein: printing on the surface of the film cover layer by adopting a high-speed ink-jet printer so as to form a pattern cover layer on the film cover layer.

8. The sheet with multi-layered gummed paper as set forth in claim 1, wherein: the ecological glue is MDI glue.