# US 10,500,821 B2 · Real wood film and method of manufacturing injection-molded real wood product by using the same

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- Number: US 10,500,821 B2
- Document ID: US10500821B2
- Status: Granted
- Kind: B2
- Application number: 15/641,442
- Filed: 2017-07-05
- Published: 2018-08-09
- Granted: 2019-12-10
- Earliest claimed: 2017-02-09
- Assignees: Intops Co., Ltd.; Sambu Fine Chemical Co., Ltd.
- Applicants: Intops Co., Ltd.; Sambu Fine Chemical Co., Ltd.; Keunha Kim; Hee-dae Park
- Inventors: Keunha Kim; Jung Ah Choi; Sung Hoon Kim; Hee-dae Park
- Web page: https://patentgrep.com/patent/US10500821B2

## CPC

- B32B 21/10: Next to a fibrous or filamentary layer
- B29C 45/14221: {by tools, e.g. cutting means}
- B29C 45/14811: {Multilayered articles (B29C45/14827 takes precedence)}
- B29C 45/16: Making multilayered or multicoloured articles {(B29C45/0062 takes precedence; feeding colouring materials into the injection unit B29C45/1816)}
- B29C 45/72: Heating or cooling
- B32B 5/022: {Non-woven fabric}
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 21/14: comprising wood board or veneer
- B32B 27/08: of synthetic resin
- B32B 27/12: next to a fibrous or filamentary layer
- B32B 27/281: {comprising polyimides}
- B32B 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers}
- B32B 27/308: {comprising acrylic (co)polymers}
- B32B 27/36: comprising polyesters
- B32B 27/365: {comprising polycarbonates}
- B29K 2711/14: Wood, e.g. woodboard or fibreboard
- B29K 2713/00: Use of textile products or fabrics for preformed parts, e.g. for inserts (B29K2105/06 takes precedence)
- B29K 2715/006: Glues or adhesives, e.g. hot melts or thermofusible adhesives
- B29L 2007/00: Flat articles, e.g. films or sheets (B29L2024/00 takes precedence)
- B32B 2255/08: on wood layer
- B32B 2255/26: Polymeric coating
- B32B 2307/308: Heat stability
- B32B 2307/412: Transparent
- B32B 2307/734: Dimensional stability
- B32B 2317/16: Wood, e.g. woodboard, fibreboard, woodchips
- B32B 2605/003: Interior finishings
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

Disclosed herein are a real wood film and a method of manufacturing an injection-molded real wood product by using the real wood film. The real wood film includes: a sliced veneer; a non-woven fabric adhered to the bottom surface of the sliced veneer by means of a non-aqueous adhesive, and configured to protect the sliced veneer from moisture; a formation improvement layer adhered to the bottom surface of the non-woven fabric, and configured to prevent the sliced veneer from being wrinkled due to heat applied to the sliced veneer and prevent a crack from occurring; and a thermoplastic adhesive layer adhered to the bottom surface of the formation improvement layer, and configured to enable adhesion to injected resin.

## Claims

### Claim 1

A real wood film, comprising:
a sliced veneer;
a non-woven fabric adhered to a bottom surface of the sliced veneer by means of a non-aqueous adhesive, and configured to protect the sliced veneer from moisture;
a formation improvement layer adhered to a bottom surface of the non-woven fabric, and configured to prevent the sliced veneer from being wrinkled due to heat applied to the sliced veneer and prevent a crack from occurring; and
a thermoplastic adhesive layer adhered to a bottom surface of the formation improvement layer, and configured to enable adhesion to injected resin,
wherein the non-aqueous adhesive used to adhere the non-woven fabric to the sliced veneer is formed by mixing an ester-based urethane material and an ether-based urethane material, and
wherein the formation improvement layer is made of polyethylene terephthalate (PET) and has a thickness of 75 μm to 100 μm to keep desirable formability.

### Claim 2 (depends on 1)

The real wood film of claim 1, wherein the non-aqueous adhesive is formed by mixing the ester-based urethane material and the ether-based urethane material at a ratio of 75:25.

### Claim 3 (depends on 1)

The real wood film of claim 1, wherein a hot-melt material is selectively disposed between the sliced veneer, the non-woven fabric, the formation improvement layer, and the thermoplastic adhesive layer.

### Claim 4 (depends on 1)

A method of manufacturing an injection-molded real wood product, the method comprising:
a) preparing the real wood film set forth in claim 1;
b) forming the real wood film by means of a heat-press process;
c) accommodating the formed real wood film inside an injection mold, and injecting resin to a back surface of the real wood film; and
d) acquiring the real wood film in which the resin has been injected to the back surface of the real wood film inside the injection mold, and forming a protective layer by painting a surface of the real wood film.

### Claim 5 (depends on 4)

The method of claim 4, wherein the protective layer is applied to a top surface of the sliced veneer, and protects the surface of the sliced veneer from ultraviolet rays.