JP3053571U - Cork tiles for floors that prevent expansion and warpage - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a cork tile for flooring, which is free from expansion and contraction and warp and has a surface protective layer of cork which is hardly peeled off from an upper end portion even after the cork tile is laid on the floor without joints. [Structure] A three-layer laminated plate formed by interposing one stretch prevention layer 3 between two base layers 4 and bonding them together is bonded to the back surface of the cork layer 2, and then the surface protection layer 1 is further formed. Wrap around the cork surface and the four ends of the cork and seal and adhere all five sides except the back of the cork.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a floor cork tile used for laying on a floor.

[0002]

[Prior art]

 Conventionally, cork tiles for flooring generally used include those coated on a cork sheet, and those in which cork is adhered while sandwiched with a vinyl chloride film.

[0003]

[Problems to be solved by the invention]

 The above-mentioned conventional floor tiles coated on the cork surface have a problem that the surface coating is hard and does not become compatible with the elastic cork, and cracks are generated on the surface after construction. On the other hand, cork tiles, which are made of cork sandwiched with a vinyl chloride film and bonded so that the elasticity of the cork is not impaired and cracks are not generated on the surface, are caused by the shrinkage of the vinyl chloride due to the temperature difference. There is also the problem of warpage due to poor fit, and also the problem of peeling off from the edges because the vinyl chloride film is adhered only to the cork surface. In addition, conventional cork tiles absorb and absorb moisture and moisture from the outside, and have the property of expanding and contracting.Therefore, when laying on the floor, a gap of about one postcard must be left between the tiles, that is, the joint width. Must. For this reason, there are problems such as dust entering the gaps between the joints, and the tiles laid after construction being warped upward like a drum.

An object of the present invention is to provide a floor cork tile which has no expansion and contraction and does not warp and a surface protection layer is not easily peeled off from an end portion, taking the above-mentioned problem of the conventional floor cork tile into consideration.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the floor cork tile of the present invention uses a strong glass fiber mat with almost no expansion to prevent expansion and contraction, and uses a vinyl chloride film to prevent cracks from occurring on the surface. Used as a protective layer.

The above-mentioned glass fiber mat is preferably formed by forming a three-layer laminated board in which the two layers are bonded to each other with a middle layer between the two vinyl chloride sheets as the base layer, and bonded to the back surface of the cork. It is preferable that the formation has a specific gravity as high as possible.

Further, it is preferable that the vinyl chloride film of the surface protective layer be wound around the surface of the cork and the four end portions and adhered in a sealed state.

[0008] A film such as polyurethane, polypropylene, or polyethylene may be used for the surface protective layer.

Further, a high-density vinyl chloride sheet containing a large amount of calcium carbonate powder may be used without using a glass fiber mat for the underlayer.

[0010]

[Action]

 When the floor cork tile constructed as described above is laid on the floor, the expansion and warping of the upper cork layer and the surface protective layer can be stopped because the underlayer hardly expands and has a high specific gravity. .

Since the surface protective layer is bonded not only to the cork surface but also to the four ends of the cork, the surface protective layer is less likely to peel off than the cork end. In addition, the cork does not expand and contract by absorbing external moisture and moisture.

[0012]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, the surface protective layer 1 does not damage the cork layer 2, keeps the elasticity and texture of the cork, and takes into consideration the occurrence of cracks. The thickness is preferably 0.3 to 0.4 mm, the cork layer 2 is made of natural cork, the density is preferably 150 to 450 kg / m3, and the thickness is preferably 2 to 3 mm.

The surface protective layer 1 is designed to seal all five surfaces except the back surface of the cork in consideration of the fact that the cork layer 2 does not absorb external moisture or moisture and does not easily peel off from the front edge. It is preferable to wrap around and adhere.

The underlayer 4 is made of a high-density vinyl chloride sheet in order to strengthen the pulling force in the floor direction so that the upper cork layer 2 and the surface protective layer 1 expand and contract, respectively, and do not warp. In order to stop this, it is preferable to bond a three-layer laminate formed by interposing a glass fiber mat of the expansion-prevention layer 3 between two base layers 4 and bonding them to the back surface of the cork layer 2. The thickness of the three-layer laminate is preferably 3 to 4 mm.

[0015]

[Effect of the invention]

 Since the present invention is configured as described above, it has the following effects.

By bonding a three-layer laminate having a glass fiber mat as an anti-stretch layer between two underlayers to the back surface of the cork layer, each of the cork and the vinyl chloride film as a surface protective layer is bonded. Stopping expansion and contraction and spreading cork tiles on the floor without joints can prevent expansion and contraction and warping.

Furthermore, the vinyl chloride film of the surface protective layer wraps around the cork surface and the four corners and tightly adheres to each other, thereby preventing the cork itself from absorbing and absorbing moisture and moisture from the outside and expanding and contracting. It can also be prevented from easily peeling off from the upper end of the cork.

[Brief description of the drawings]

[Figure 1] Perspective view of cork tiles for stretchable / warped floor

FIG. 2 is a cross-sectional view as viewed from arrows AA and BB in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Surface protective layer 2 Cork layer 3 Stretch prevention layer 4 Underlayer

Claims (2)

[Utility model registration claims] 1. A three-layer laminate formed by bonding a stretch prevention layer 3 between two underlayers 4 to form a three-layer laminate, which is then adhered to the back surface of the cork layer 2. After forming
Further, a floor tile in which a five-layer laminate is finally formed by bonding the surface protective layer 1 to the cork surface. 2. A floor tile in which a surface protective layer 1 is adhered so as to cover all five sides of the cork layer 2 except the front surface and four end portions, that is, the back surface of the cork layer 2.