JP-2026075342-A - Hard flooring

Abstract

[Problem] To provide a resin flooring material that is less prone to conforming to uneven surfaces and has excellent dimensional stability. [Solution] A hard flooring material comprising a resin-containing hard layer and a transparent resin layer above it, and a back resin layer below the resin-containing hard layer, characterized in that (1) the resin-containing hard layer contains at least a resin component and an inorganic filler, (2) the resin component content in the resin-containing hard layer is 35% by weight or less, (3) the plasticizer content in the resin-containing hard layer is less than 1% by weight, and (4) the inorganic filler content in the resin-containing hard layer is 65% by weight or more. [Selection Diagram] Figure 1

Inventors

• 福田 亮
• 西山 知也
• 町矢 良樹

Assignees

• 東リ株式会社

Dates

Publication Date

20260508

Application Date

20241022

Claims (6)

1. A flooring material comprising a resin-containing hard layer and a transparent resin layer above it, and a back resin layer below the resin-containing hard layer, (1) The resin-containing hard layer comprises at least a resin component and an inorganic filler, (2) The resin component content in the resin-containing hard layer is 35% by weight or less, (3) The plasticizer content in the resin-containing hard layer is less than 1% by weight, (4) The inorganic filler content in the resin-containing hard layer is 65% by weight or more. A hard flooring material characterized by the following features.
2. The hard flooring material according to claim 1, wherein the resin-containing hard layer contains a polyvinyl chloride resin.
3. A hard flooring material according to claim 1, wherein the total thickness is 2.5 mm or less.
4. A rigid flooring material according to claim 1, which does not contain a shape-stabilizing layer containing inorganic fibers.
5. The rigid flooring material according to claim 1, wherein the transparent resin layer contains a vinyl chloride resin containing 13% by weight or more of a plasticizer.
6. A floor structure in which the hard flooring material described in any one of claims 1 to 5 is attached to the subfloor using at least one of a removable adhesive, adsorbent, and adhesive tape.

Description

This invention relates to a novel hard flooring material. For residential use, flooring materials such as wood flooring, resin flooring, carpets, and tatami mats are used in living spaces such as living rooms, kitchens, and hallways, depending on the area. Among these, resin flooring is widely used in various living spaces due to its superior cushioning, flexibility, water resistance, ease of maintenance, and wide variety of designs (for example, Patent Documents 1-3). However, due to their flexibility, resin flooring materials can conform to unevenness in the subfloor, sometimes resulting in a wavy appearance across the entire floor surface. Furthermore, their flexibility makes them prone to dents, and these dents may leave visible marks. A more even and flatter floor surface, with minimal unevenness and dents, is aesthetically desirable. In response to the above-mentioned problems, the applicant has developed a novel hard flooring material and filed a patent application (Patent Document 4). This hard flooring material, while rigid, possesses slight flexibility, making it less susceptible to unevenness in the subfloor, thus creating a flatter floor surface and achieving a high level of aesthetic appeal. Japanese Patent Publication No. 2012-122220Japanese Patent Publication No. 2013-49989Patent No. 7069576Japanese Patent Publication No. 2021-185299 This figure shows the basic layer structure of the hard flooring material of the present invention.This figure shows an example of the layer structure according to an embodiment of the hard flooring material of the present invention.This figure shows the hard flooring material (rectangular tile) of the present invention with chamfered (tapered) portions formed on the upper corners of all four sides.This is a schematic diagram showing the sample placed in the apparatus to measure the amount of drooping in Test Example 1.Figure 5A shows the state before the weight is placed. Figure 5B shows the state as seen from direction A (with weight 72 placed) in Figure 4A.This figure shows an example of the planar shape of the flooring material of the present invention. 1. Hard Flooring The flooring material of the present invention (the flooring material of the present invention) is a flooring material that includes a resin-containing hard layer and a transparent resin layer above it, and a back resin layer below the resin-containing hard layer, (1) The resin-containing hard layer comprises at least a resin component and an inorganic filler, (2) The resin component content in the resin-containing hard layer is 35% by weight or less, (3) The plasticizer content in the resin-containing hard layer is less than 1% by weight, (4) The inorganic filler content in the resin-containing hard layer is 65% by weight or more. It is characterized by the following: 1) Basic Structure of the Flooring Material of the Present Invention The basic structure of the flooring material of the present invention will be described below. Figure 1 shows the basic layer structure of the flooring material of the present invention. In the flooring material 10 of the present invention, a transparent resin layer 12 is laminated on top of a resin-containing hard layer 11, and a back surface resin layer 13 is laminated on the opposite side of the resin-containing hard layer 11. In Figure 1, a transparent resin layer 12 is formed in direct contact with the resin-containing hard layer 11, and a backside resin layer 13 is formed on the opposite side of the resin-containing hard layer 11. However, other layers may be formed as long as the transparent resin layer 12 is positioned above the resin-containing hard layer 11 and the backside resin layer 13 is laminated on the backside of the resin-containing hard layer 11. Therefore, for example, a layer configuration like that shown in Figure 2 is also included as an embodiment of the present invention. The flooring material 10 of the present invention in Figure 2 is a laminate in which the backside resin layer 13, resin-containing hard layer 11, printed layer 14, transparent resin layer 12, and protective layer 15 are formed in that order from bottom to top. The planar shape of the flooring material of the present invention can be, for example, a square, rectangle, rhombus, or other rectangular shape. Furthermore, the size of the flooring material of the present invention can be changed according to, for example, the installation location, the desired design, etc. For example, if it is rectangular, it can be appropriately set within a range of approximately 30 to 100 cm in length and 30 to 100 cm in width, but is not limited to this. For example, as shown in Figure 6, a roughly rectangular flooring material 1, where the length in the first direction L1 is sufficiently larger than the length in the second direction L2, is generally difficult to remove in conventional installations. In contrast, even with a planar shape like that shown in Figure 6, the flooring materia