JPS62201241A - Cork decorative sheet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention is a decorative sheet for floors, walls, etc. in which a cork sheet is laminated to a resin film or sheet, which reinforces the strength of the cork sheet and has moisture permeability. This relates to a cork decorative sheet that does not damage the materials.

(Prior art) Cork is produced from trees such as cork oaks and is expensive, so cork for floors and walls has traditionally been made into thin sheets and pasted onto plywood, making them moisture resistant. It has poor properties and may swell or peel due to moisture absorption, and if something is dropped on the cork surface, plywood is hard and cork is brittle, so the plywood surface and the fallen object are This caused problems such as holes being created in the cork, and plywood was relatively expensive. For this reason, some cork sheets were made thicker by using an inexpensive resin sheet or film for reinforcement instead of plywood.

(Problems to be Solved by the Invention) However, in cases where the cork sheet is reinforced with a resin sheet, etc., the moisture permeability, which is a characteristic of the cork sheet, is impaired by the resin sheet, and dew condensation may occur on the adhesive surface between the resin sheet and the cork sheet. Moisture tends to accumulate, which can cause cork to corrode, and since cork and synthetic resin are bonded to different materials, the adhesive strength is weak and there is a risk of peeling due to differences in expansion and contraction during cold and warm weather. Additionally, there are various problems such as the resin sheet portion stretching or sticking to the blade when cutting the sheet.

(Means for Solving the Problems) This invention was proposed in order to eliminate the problems mentioned in "-", and it is a method of making cork decorative sheets containing cellulose-based powder aggregates such as wood flour and cork powder. The thermoplastic resin film or sheet and the cork sheet are polymerized and bonded to each other.

(Example) Fig. 1 shows an example of the present invention, in which 1 is made of vinyl chloride, polyethylene, etc. containing cellulose powder aggregate such as 0, 1 to B powder made by slicing cork material. A corked paddy sheet A is constructed by polymerizing and adhering the cork sheet 1 and the resin sheet 2 with an adhesive, which are thermoplastic resin films or sheets. The thermoplastic resin film or sheet 2 has an appropriate thickness depending on the surface to which the cork decorative sheet 2 is attached.

FIGS. 2 and 3 show other embodiments, and FIG. 2 shows the thermoplastic resin sheet 2 in the above embodiment with cloth, paper, or both cloth and paper on the opposite side of the cork seal 1. The strength of the cork decorative sheet A is increased by laminating the cork decorative sheet A or attaching another reinforcing sheet 3.

In FIG. 3, a thick long rubber sheet or a foamed resin sheet 4 is further adhered to the surface of the reinforcing sheet 3 to provide cushioning properties and to create a long rug.

(Effects) The cork decorative sheet according to the present invention is made by polymerizing and bonding a thermoplastic resin film or sheet containing a cellulose-based powder aggregate such as wood flour or cork powder to a cork sheet, so that a thin cork decorative sheet can be produced. Since the thermoplastic resin sheet part also contains cellulose-based powder aggregate, it has air permeability and moisture permeability, and there is no condensation on the stretched surface of the decorative sheet and no peeling.

In addition, since the cork sheet is reinforced by the resin sheet, it will not tear or break, and the flexibility of the resin sheet makes it easy to lay and paste, and the elasticity of the resin sheet improves cushioning properties. Wood flour, cork powder, etc. are mixed into the material, further improving its sound absorption properties.

In addition, it is made of extremely thin sheets of cork and resin sheets, and bonding can be done simply by combining the rolled sheets together, pressing them together with a roll from both sides, and then winding them up again. Since less equipment space is required, costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view of one embodiment of the present invention, and FIGS. 2 and 3 are sectional views of various other embodiments. 1... Cork sheet, 2... Resin film or sheet, 3... Reinforcement sheet, A... Cork decorative sheet. Figure 2

Claims (1)

[Claims] A cork decorative sheet characterized in that a thermoplastic resin film or sheet containing a cellulose-based powder aggregate such as wood flour or cork powder is polymerized and bonded to a cork sheet.