JP2652758C - - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an architectural plate used for flooring, ceiling, wall and the like, and a method of manufacturing the same. 2. Description of the Related Art As this type of architectural plate, there is, for example, a flooring material directly adhered on a concrete foundation at a construction site of an apartment. This flooring is applied after the primary hardening of the concrete is completed and has sufficient strength, but the concrete is still high in water content after the primary hardening is completed, and is directly applied on this concrete The moisture in the concrete will be absorbed from the back side of the flooring. [0003] Plywood is generally used as the flooring substrate, but moisture is first absorbed by the backside wood veneer to expand the wood veneer. On the other hand, since a decorative sheet with a surface coating is generally attached to the front-side wooden veneer, almost no moisture is absorbed from the front side. For this reason, there is a problem that the expansion rates of the front side and the back side of the flooring material are different, and warpage occurs in which the rear side is convex in the width direction of the flooring material. [0004] Such a problem is not limited to a floor material directly applied to a concrete substrate, but also occurs due to an increase in humidity in an environment after the application of an interior material, a wall material and the like. [0005] In order to solve such a problem, an interior material disclosed in Japanese Utility Model Publication No. 4-7948 has been proposed. This interior material is made of a moisture-proof sheet 12 formed by laminating kraft papers 14 and 16 on the front and back surfaces of a polyethylene sheet 15 as a core layer, and a substrate 11 having a decorative layer 11a formed on the surface via an adhesive 13. It is configured by sticking to the back surface (FIG. 2). By adhering such a moisture-proof sheet to the back surface of the substrate, not only can moisture permeation from the front side to the back side of the interior material be prevented, but also the kraft paper layer is disposed on the lowermost layer of the interior material. Thus, there is also an effect that the application to the base material can be performed by the adhesive. When the moisture-proof sheet 12 is laminated and adhered to the back surface of the substrate 11 via the adhesive 13, the adhesive permeates from the front side of the surface kraft paper 14 in the moisture-proof sheet, but it is not necessarily required. The permeation of the adhesive is not performed over the entire thickness of the kraft paper 14, and the surface kraft paper 14 is separated into the adhesive impregnated portion 14a and the non-impregnated portion 14b. When the interior material is adhered to the base material construction surface using an adhesive, the adhesive partially penetrates from the back side of the back kraft paper 16, and the kraft paper 16 similarly The layers are separated into an adhesive impregnated portion and a non-impregnated portion. Since the peel strength of the non-impregnated portions of these kraft papers 14 and 16 is not sufficient, there has been a problem that the substrate is easily peeled off from the working surface at the boundary surface of the non-impregnated portions. Accordingly, the present invention solves the above-mentioned drawbacks of the prior art, prevents the occurrence of warpage due to the absorption of water after construction, and provides a new structure capable of sufficiently exhibiting peel strength. The purpose of the present invention is to provide a building plate. [0010] That is, the architectural plate according to the present invention prevents the back surface of the substrate through the adhesive.
A moisture layer is laminated, and the moisture-proof layer is disposed on the surface in the thickness direction.
The front side synthetic resin impregnated reinforced paper layer, synthetic resin core layer and back side paper layer
The reinforced paper layer impregnated with synthetic resin on the front side has an adhesive impregnated layer on its front side and an upper layer on its back side.
With a synthetic resin impregnated layer on one side
The whole paper is impregnated with resin and the back side paper layer is
Having a non-impregnated layer that is not impregnated with the synthetic resin on the back side
It is characterized by. [0011] [act] Since the adhesive-impregnated layer in the moisture-proof layer and the synthetic resin-impregnated layer is formed by intertwined in a state of entering into the <br/> substantially undulating in cross-section to each other, a large peeling strength is obtained, delamination Is prevented from occurring. [0012] [Embodiment] FIG. 1 shows the structure of a flooring according to an embodiment of the present invention. As is clear from the figure, this flooring is formed by laminating a moisture-proof layer 2 via an adhesive 3 on the back surface of a substrate 1 having a decorative layer 1a on the surface. As the substrate 1, any plate material such as plywood, wood chipboard, wood fiber board, veneer laminate, cement plate, slag gypsum plate or the like can be used alone or in any combination. A material in which a synthetic resin sheet, a foam synthetic resin sheet, a sound insulation sheet, or the like having an excellent cushioning effect is sandwiched between plate materials and laminated may be used. [0014] side surface of the substrate 1, for fitting during adjacent construction, Omi 7 and Mesumi 8 according actual machining is formed. The actual processing may be performed in another manner, for example, by routine processing. The decorative layer 1a formed on the surface of the substrate 1 is, for example, a natural veneer obtained by cutting natural wood, an artificial veneer, or a veneer sheet lined with an arbitrary backing material such as a nonwoven fabric, paper, or a synthetic resin sheet. Or decorative paper, resin-impregnated paper, non-woven fabric, paper,
It is made of a decorative sheet such as a synthetic resin sheet, and is adhered to the surface of the substrate 1 with an adhesive. Alternatively, the decorative layer 1 is obtained by directly painting or printing on the surface of the decorative board.
a may be used. An overcoat layer can be further formed on the surface of the decorative layer 1a. By providing such a decorative layer 1a, penetration of moisture from the surface side is prevented. The moisture-proof layer 2 is made of a moisture-proof sheet formed by laminating a paper layer such as kraft paper on the front and back surfaces of a core layer of a thermoplastic synthetic resin having excellent waterproof properties such as polyethylene or polypropylene (see FIG. 2). When a moisture-proof sheet 2 having substantially the same configuration as that used in the technology is attached to the back surface of the substrate 1 via an adhesive 3 such as a vinyl acetate resin, the temperature is equal to or higher than the curing temperature of the adhesive and the thermoplasticity of the core layer. The thermoplastic synthetic resin is melted by heating and pressing at a temperature condition not lower than the melting temperature of the synthetic resin, and is formed by impregnating the adhesive 3 into the paper layer on the front side while melting the thermoplastic resin into the front and back paper layers. Is done. [0017] More specifically, the moisture-proof sheet before heating pressing the rear surface of the substrate is one in which the interface between the core layer and the front and back sheet layer is laminated and integrated in a planar shape appear clearly,
By heating and pressing under a temperature condition equal to or higher than the melting temperature of the synthetic resin of the core layer, the synthetic resin melts and permeates the front and back paper layers. In this case, the degree of permeation is not uniform, and the molten synthetic resin permeates in an uneven state in each part of the front and back paper layers. At the same time, the adhesive 3 penetrates into the surface paper layer of the moisture-proof sheet, but the permeation also proceeds in an uneven state, and when it reaches the permeation portion of the molten synthetic resin, further permeation is hindered. The permeation proceeds to other paper layer portions where the synthetic resin has not penetrated. [0018] By curing after having penetrated into this manner adhesives and synthetic resin with each other unevenly adjacent layers, the moisture barrier layer 2, an adhesive impregnated layer 2a at the surface side, synthesis in the rear surface side resin-impregnated layer 2b are formed in such a manner that they are intertwined with each other in a substantially wavy shape in cross section (FIG. 1). The top paper layer 4 in the moisture-proof sheet has its upper surface adhesive layer 3 permeated on its surface side to become the adhesive impregnated layer 2a, and its back surface side has permeated by the molten synthetic resin from the lower synthetic resin core layer. It forms a part of the synthetic resin impregnated layer 2b, and these are in a state of being corrugated in cross section with each other. Further, the rear surface paper layer 6 in the moisture-proof sheet, in its surface side forms a synthetic resin-impregnated layer 2b 'permeates the molten synthetic resin, cross-sectional which is cured remains uneven penetration state It will have a wavy interface in. Moisture proof layer 2
The non-impregnated paper layer 2c in which the synthetic resin does not permeate in the back paper layer remains in the lower layer portion, and when the floor material of FIG. When it penetrates into the impregnated paper layer 2c (consisting of the back paper layer) and reaches the already cured and formed synthetic resin impregnated layer 2b, it is prevented from further permeation, so that the synthetic resin is formed similarly to the above-mentioned front paper layer. A state is obtained in which the resin impregnated layer 2b 'and the adhesive impregnated layer (formed at the portion 2c) are corrugated in the cross section with each other. [0020] That is, in any part of the moisture-proof layer 2, a state where only the conventional paper layers such as are dimensionally stacked with other layers is not present, and that the peel strength is very good. At the same time, the synthetic resin-impregnated layer 2b formed at the center of the moisture-proof layer 2 effectively prevents moisture penetration from the back side of the substrate. In the present invention, a part of the synthetic resin used as the core layer in the moisture-proof sheet is left as it is as the synthetic resin core layer 2d in the moisture-proof layer 2 by relaxing and adjusting the conditions of the heating and pressing. Therefore, as shown in FIG. 1, the configuration of the moisture-proof layer 2 in the building material (floor material) of the present invention is, as shown in FIG. 1, from the surface side, the adhesive impregnated layer 2a, the upper synthetic resin impregnated layer 2b, and the synthetic resin core layer 2d. , A lower synthetic resin impregnated layer 2b 'and a non-impregnated paper layer 2c in this order. An adhesive impregnated layer 2a and an upper synthetic resin impregnated layer 2b in the front paper layer 4 of the original moisture-proof sheet are hardened and formed in a penetrating state in which they cross each other in a substantially wavy shape, and the lower paper layer 6 is impregnated with the lower synthetic resin. Contact layer 2b 'is in the cross-sectional
And is hardened and formed in a penetrating state that has penetrated into a substantially wavy shape. As another method for obtaining the configuration of the flooring material shown in FIG. 1, when laminating paper layers on the front and back sides of a synthetic resin as a core layer, the temperature is higher than the melting temperature of the synthetic resin. By heating and pressing, a part of the synthetic resin of the core layer is impregnated in the front and back paper layers, and the thus obtained moisture-proof sheet 2 can be adhered to the back surface of the substrate 1 via the adhesive 3. According to building board the present invention, as a result of moisture-proof sheet is stuck on the back surface of the substrate is subjected to heat pressing by temperature above the melting temperature of the synthetic resin of the core layer,
The original orderly lamination structure is lost, and the molten synthetic resin permeates the front and back paper layers in a non-uniform state, forming a synthetic resin impregnated layer, and at the same time, the adhesive permeates the front paper layer in a non-uniform state. An adhesive impregnated layer is formed. Since the synthetic resin impregnated layer and the adhesive impregnated layer are entangled with each other in the surface paper layer in a state of being substantially corrugated in cross section, they exhibit extremely excellent peel strength. The portion of the non-impregnated layer which is left on the back sheet layer, the adhesive becomes permeated adhesive impregnated layer when construction through the adhesive construction plate construction surface, said surface sheet As in the case of the layer, the adhesive-impregnated layer and the synthetic resin-impregnated layer are entangled with each other in a substantially corrugated state in cross section, and also exhibit extremely excellent peel strength in this portion.

[Brief description of the drawings] FIG. 1 is a schematic cross-sectional view showing a configuration of a flooring as one embodiment of the present invention. FIG. 2 is a schematic cross-sectional view showing a configuration of a building plate according to a conventional example.

Claims (1)

A moisture-proof layer is laminated on the back surface of a substrate via an adhesive.
The synthetic resin impregnated reinforced paper layer, synthetic resin core layer and
And the paper layer on the back side are laminated in this order.
With an adhesive impregnated layer and an upper synthetic resin impregnated layer on the back side.
The entire paper is impregnated with resin in a state of being in a substantially wavy shape on the surface.
The paper layer on the back side contains a synthetic resin impregnated layer below on the front side, and the synthetic resin on the back side.
An architectural plate having a non-impregnated layer that is not immersed.