Thermoplastic resin film, its manufacturing method, and laminated body

Patent metadata

Field	Value
Publication number	US-11052645-B2
Application number	US-201716077329-A
Country	US
Kind code	B2
Filing date	Feb 13, 2017
Priority date	Feb 15, 2016
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

Provided is a thermoplastic resin film having at least one of film surfaces being excellent in printability, having sufficiently low internal haze, and exhibiting a favorable matte appearance. A thermoplastic resin film according to the present invention composed of a thermoplastic resin composition (C) including at least one kind of a thermoplastic resin (R) and fine particles (P) having a volume average particle diameter of 0.5 to 15 μm and a refractive index different from that of the thermoplastic resin (R) by 0.02 or more.At least one of film surfaces satisfies formulas (1) and (2).GL≥60  (1),GL−35≤GH≤GL−10  (2)(In the formulas (1) and (2), GL is 60° gloss (%) at 20° C., GH is 60° gloss (%) when the thermoplastic resin film is heated at a temperature 10° C. higher than a glass transition temperature of the thermoplastic resin composition (C) for 30 minutes, then cooled to 20° C.).

First claim

The invention claimed is:

1. A thermoplastic resin film composed of a thermoplastic resin composition (C) comprising:
a thermoplastic resin (R); and
fine particles (P) having a volume average particle diameter of from 0.5 to 15 μm and a refractive index different from a refractive index of the thermoplastic resin (R) by 0.02 or more,
wherein:
the fine particles (P) are inorganic particles; and
at least one of thermoplastic resin film surfaces satisfies formulas (1) and (2):
G L ≥60  (1), and

G L −35≤ G H ≤G L −10  (2)

wherein G L is 60° gloss (%) at 20° C., and G H is 60° gloss (%) when the thermoplastic resin film is heated at a temperature 10° C. higher than a glass transition temperature of the thermoplastic resin composition (C) for 30 minutes, then cooled to 20° C.

2. The thermoplastic resin film according to claim 1 , wherein the thermoplastic resin film further satisfies formula (3-1):
10/ d≤W≤ 30/ d   (3-1)

wherein d is a volume average particle diameter (μm) of the fine particles (P), and W is a content (mass %) of the fine particles (P) in the thermoplastic resin film.

3. The thermoplastic resin film according to claim 1 , wherein an external haze of the thermoplastic resin film is lower than an internal haze of the thermoplastic resin film.

4. The thermoplastic resin film according to claim 1 , wherein the thermoplastic resin (R) comprises:
acrylic-based multilayer structure polymer particles (A),
wherein:
at least one inner layer of the thermoplastic resin is a crosslinked elastic polymer layer with a main component monomer unit being an alkyl acrylate ester monomer unit having an alkyl group carbon number of 1 to 8 and/or a conjugated diene-based monomer unit; and
an outermost layer of the thermoplastic resin is a thermoplastic polymer layer with a main component monomer unit being an alkyl methacrylate ester monomer unit having an alkyl group carbon number of from 1 to 8.

5. The thermoplastic resin film according to claim 4 , wherein the acrylic-based multilayer structure polymer particles (A) comprise:
three-layer structure polymer particles (AX) that comprise, from its center, first to third layers, wherein:
the first layer consists of a crosslinked polymer layer comprising from 30 to 98.99 mass % of methyl methacrylate units, from 1 to 70 mass % of alkyl acrylate ester units having an alkyl group carbon number of from 1 to 8, and from 0.01 to 2 mass % of polyfunctional monomer units;
the second layer consists of a cross linked elastic polymer layer comprising from 70 to 99.9 mass % of alkyl acrylate ester units having an alkyl group carbon number of from 1 to 8, from 0 to 30 mass % of methyl methacrylate units, and from 0.1 to 5 mass % of polyfunctional monomer units; and
the third layer consists of a hard thermoplastic polymer layer comprising from 80 to 99 mass % of methyl methacrylate units and from 1 to 20 mass % of alkyl acrylate ester units having an alkyl group carbon number of from 1 to 8.

6. The thermoplastic resin film according to claim 4 , wherein the acrylic-based multilayer structure polymer particles (A) have a particle diameter of from 0.05 to 0.20 μm.

7. The thermoplastic resin film according to claim 4 , wherein the thermoplastic resin (R) further comprises a methacrylic-based resin (B) having 80 mass % or more of methyl methacrylate units and having an intrinsic viscosity of from 0.3 to 1.0 dl/g.

8. A printed resin film, comprising:
the thermoplastic resin film according to claim 4 ; and
a printed film surface.

9. A matte resin film obtained by heating the thermoplastic resin film according to claim 4 .

10. A decorating film, comprising:
the thermoplastic resin film according to claim 4 .

11. A film for building materials, comprising:
the thermoplastic resin film according to claim 4 .

12. A laminated film, comprising:
the thermoplastic resin film according to claim 4 .

13. A laminated body, comprising:
the thermoplastic resin film according to claim 4 laminated on a substrate.

14. A method of manufacturing the thermoplastic resin film according to claim 4 , the method comprising:
melting and extruding the thermoplastic resin composition (C) from a T-die into a film shape; and
sandwiching a melted product extruded into the film shape between a pair of cooling rollers, which are both metallic rigid rollers or one is a metallic rigid roller and the other is a metallic elastic roller.

15. The method according to claim 14 , which satisfies formula (4):
10≤| TgC−T 2|≤40  (4), and

wherein T1 is a surface temperature of one of the cooling rollers,
T2 is a surface temperature of the other one of the cooling rollers (where T2≥T1), and
TgC is a glass transition temperature of the thermoplastic resin composition (C).

16. A method of manufacturing a matte resin film, the method comprising:
applying a heat treatment to the thermoplastic resin film according to claim 4 .

17. A method of manufacturing a matte resin film, the method comprising:
printing at least one film surface of the thermoplastic resin film according to claim 4 ; and
applying a heat treatment to the thermoplastic resin film.

Assignees

• Kuraray Co

Inventors

• Tsuji Wataru
• Hoshiba Takao
• Fujii Nariaki
• Hagiwara Masaaki

Classifications

• B32B27/20

  using fillers, pigments, thixotroping agents · CPC title

• B32B27/30

  comprising vinyl {(co)polymers; comprising acrylic (co)polymers} · CPC title

• B32B15/085

  comprising polyolefins · CPC title

• C08J2300/22

  Thermoplastic resins · CPC title

• B32B2419/06

  Roofs, roof membranes · CPC title