JP-7857185-B2 - Decorative sheets and decorative materials

Inventors

• 折原 隆史
• 冨永 孝史
• 藤澤 真友子

Assignees

• ＴＯＰＰＡＮホールディングス株式会社

Dates

Publication Date

20260512

Application Date

20220805

Priority Date

20210324

Claims (8)

1. A colored substrate layer to which fillers, colorants, and flame retardants are added, A transparent resin layer laminated on one side of the colored substrate layer, The system comprises a concealing layer provided between the colored substrate layer and the transparent resin layer , The aforementioned colored substrate layer is formed using a resin composition obtained by mixing plant-derived high-density polyethylene and low-density polyethylene. The transparent resin layer is formed using a resin composition containing plant-derived high-density polyethylene. The resin composition forming the transparent resin layer contains a nucleating agent. The density of the colored substrate layer is in the range of 0.98 g/ cm³ to 1.10 g/ cm³ . The nucleating agent is added to the decorative sheet in a range of 500 ppm or more and less than 1000 ppm, based on the mass of the high-density polyethylene .
2. The decorative sheet according to claim 1 , wherein the low-density polyethylene forming the colored substrate layer is plant-derived low-density polyethylene.
3. The decorative sheet according to claim 1 or claim 2, wherein the low-density polyethylene forming the colored base material layer is contained in the colored base material layer in an amount of 5% by mass or more and 30% by mass or less of 100 % by mass of the colored base material layer.
4. The decorative sheet according to any one of claims 1 to 3 , wherein the mixing ratio of the high-density polyethylene and the low-density polyethylene in the colored substrate layer is in the range of 95:5 to 70:30.
5. The decorative sheet according to any one of claims 1 to 4 , wherein the transparent resin layer is formed using a resin composition obtained by mixing the plant-derived high-density polyethylene and the plant-derived low-density polyethylene.
6. The decorative sheet according to claim 5 , wherein the mixing ratio of the high-density polyethylene and the low-density polyethylene in the transparent resin layer is within the range of 80:20 to 60:40.
7. A decorative sheet according to any one of claims 1 to 6 , comprising a primer layer laminated on the other side of the colored substrate layer.
8. Substrate and A decorative material comprising a decorative sheet according to any one of claims 1 to 7 , laminated on at least one surface of the base material.

Description

This invention relates to decorative sheets and decorative materials. As an alternative to decorative sheets made of polyvinyl chloride, decorative sheets using olefin resins have been proposed, for example, as disclosed in Patent Document 1. Japanese Patent Publication No. 2014-188941 This is a cross-sectional view showing the configuration of the decorative sheet and decorative material in the first embodiment of the present invention. Embodiments of this technology will be described below with reference to the drawings. In the drawings, identical or similar parts are denoted by the same or similar reference numerals, and redundant explanations are omitted. Each drawing is schematic and may differ from reality. The embodiments shown below are illustrative examples of devices and methods for realizing the technical idea of this technology, and the technical idea of this technology is not limited to the devices and methods exemplified in the embodiments below. The technical idea of this technology can be modified in various ways within the technical scope described in the claims. Furthermore, the directions "left and right" and "up and down" in the following description are merely definitions for the convenience of explanation and do not limit the technical idea of the present invention. Therefore, for example, if the paper is rotated 90 degrees, "left and right" and "up and down" are swapped when read, and if the paper is rotated 180 degrees, "left" becomes "right" and "right" becomes "left," of course. (First Embodiment) The composition of the decorative material 10 will be described below with reference to Figure 1. As shown in Figure 1, the decorative material 10 comprises a decorative sheet 1 and a base material 9. The specific configuration of the decorative sheet 1 will be described later. The base material 9 is formed in a plate shape using, for example, wood-based boards, inorganic boards, or metal plates, and a decorative sheet 1 is laminated to one side (the upper side in Figure 1). In other words, the decorative material 10 comprises the base material 9 and the decorative sheet 1 laminated to one side of the base material 9. (Composition of decorative sheet) As shown in Figure 1, the decorative sheet 1 comprises a colored base material layer 2, a pattern layer 3, an adhesive layer 4, a transparent resin layer 5, a surface protection layer 6, an uneven surface 7, and a primer layer 8. <Colored base material layer> The colored substrate layer 2 is formed using a thermoplastic resin. As the thermoplastic resin forming the colored substrate layer 2, for example, a colored thermoplastic polyolefin resin can be used. As the polyolefin resin, for example, polyolefin resins such as polyethylene, polypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, ethylene-α-olefin copolymer, propylene-α-olefin copolymer, etc., or olefin copolymer resins such as ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-(meth)acrylic acid (ester) copolymer, ethylene-unsaturated carboxylic acid copolymer metal neutralization (ionomer), etc., can be used individually or as a mixture of two or more, copolymer, composite, laminate, etc. Furthermore, the colored base layer 2 may be formed from a resin composition containing plant-derived high-density polyethylene. In addition, the colored base layer 2 may contain plant-derived low-density polyethylene or plant-derived linear low-density polyethylene in addition to plant-derived high-density polyethylene. Furthermore, as polyolefin resins, it is possible to appropriately select and use from the above-mentioned types depending on the intended use of the decorative sheet 1. In particular, the most suitable for general use is polypropylene resin, that is, a single or copolymer mainly composed of propylene. For example, homopolypropylene resin, random polypropylene resin, block polypropylene resin, etc. may be used alone or blended as appropriate, and it is also possible to use resins that further contain atactic polypropylene as appropriate. In addition, copolymers containing olefin monomers other than propylene may also be used. For example, it is possible to use a propylene-α-olefin copolymer that has a polypropylene crystalline portion and contains 15 mol [%] or more of one or more carbon-2 to carbon-20 α-olefins other than propylene, preferably ethylene, butene-1, 4-methylpentene-1, hexene-1, or octene-1 comonomers. Furthermore, modifiers such as low-density polyethylene, ethylene-α-olefin copolymer, ethylene-propylene copolymer rubber, ethylene-propylene-unconjugated diene copolymer rubber, styrene-butadiene copolymer, or hydrogenated materials, which are typically used to soften polypropylene resins, can be appropriately added. Furthermore, the colored substrate layer 2 may contain, if necessary, one or more additives selected from various additives such as colorants, fillers, ultraviolet absorbers, light stabilizers, heat stabilize