Black film

• US 10,851,216 B2
• Filed: 06/13/2017
• Issued: 12/01/2020
• Est. Priority Date: 06/14/2016
• Status: Active Grant

• Current Assignee: Kuraray Company Limited
• Original Assignee: Kuraray Company Limited
• Inventors: Ozawa, Yushi
• Primary Examiner(s): Butcher, Robert T
• Application Number:
  US16/309,635
• Publication Number:
  US 20190218353A1
• Time in Patent Office: 1,267 Days
• Field of Search: None
• CPC Class Codes: B29C 48/00 Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor extrusion blow-moulding B29C49/04
• CPC Class Codes: B29C 48/08 flexible, e.g. films
• CPC Class Codes: B29C 48/21 the layers being joined at their surfaces
• CPC Class Codes: B29C 48/307 specially adapted for bringing together components, e.g. melts within the die
• CPC Class Codes: B29C 48/37 Gear pumps
• CPC Class Codes: B29C 48/495 Feed-blocks extrusion moulding of multi-component articles B29C48/16
• CPC Class Codes: B29C 48/69 Filters or screens for the moulding material
• CPC Class Codes: B29C 55/04 uniaxial, e.g. oblique
• CPC Class Codes: B29C 55/065 in several stretching steps
• CPC Class Codes: B29D 7/01 Films or sheets
• CPC Class Codes: B29K 2033/12 Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
• CPC Class Codes: B29K 2105/0032 Pigments, colouring agents or opacifiyng agents
• CPC Class Codes: B29K 2995/002 Coloured
• CPC Class Codes: B32B 1/00 Layered products having a non-planar shape
• CPC Class Codes: B32B 15/082 comprising vinyl resins; comprising acrylic resins
• CPC Class Codes: B32B 15/09 comprising polyesters
• CPC Class Codes: B32B 15/18 comprising iron or steel B32B15/011, B32B15/012 and B32B15/013 take precedence
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 2250/24 All layers being polymeric
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2255/26 : Polymeric coating
• CPC Class Codes: B32B 2270/00 : Resin or rubber layer containing a blend of at least two different polymers
• CPC Class Codes: B32B 2307/40 : having particular optical properties light or UV resistant B32B2307/71
• CPC Class Codes: B32B 2307/4026 : within the layer by addition of a colorant, e.g. pigments, dyes
• CPC Class Codes: B32B 2307/412 : Transparent
• CPC Class Codes: B32B 2307/536 : Hardness
• CPC Class Codes: B32B 2307/558 : Impact strength, toughness
• CPC Class Codes: B32B 2307/584 : Scratch resistance
• CPC Class Codes: B32B 2307/71 : Resistive to light or to UV
• CPC Class Codes: B32B 2307/712 : Weather resistant
• CPC Class Codes: B32B 2307/732 : Dimensional properties
• CPC Class Codes: B32B 2419/00 : Buildings or parts thereof walls, panels B32B2607/00
• CPC Class Codes: B32B 2419/06 : Roofs, roof membranes
• CPC Class Codes: B32B 2439/00 : Containers; Receptacles closures therefor B32B2435/00
• CPC Class Codes: B32B 2451/00 : Decorative or ornamental articles wall paper B32B2607/02
• CPC Class Codes: B32B 2457/00 : Electrical equipment
• CPC Class Codes: B32B 2479/00 : Furniture upholstery B32B2601/00
• CPC Class Codes: B32B 2535/00 : Medical equipment, e.g. bandage, prostheses, catheter medical patches B32B2556/00
• CPC Class Codes: B32B 2551/08 : Mirrors
• CPC Class Codes: B32B 2571/00 : Protective equipment
• CPC Class Codes: B32B 2590/00 : Signboards, advertising panels, road signs
• CPC Class Codes: B32B 2605/003 : Interior finishings
• CPC Class Codes: B32B 2605/006 : Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
• CPC Class Codes: B32B 2607/02 : Wall papers, wall coverings
• CPC Class Codes: B32B 27/20 : using fillers, pigments, thixotroping agents
• CPC Class Codes: B32B 27/30 : comprising vinyl (co)polymers; comprising acrylic (co)polymers
• CPC Class Codes: C08J 2333/12 : Homopolymers or copolymers of methyl methacrylate
• CPC Class Codes: C08J 5/18 : Manufacture of films or sheets
• CPC Class Codes: C08J 7/0427 : with only one layer of a composition containing a polymer binder with more layers C08J7/042
• CPC Class Codes: C08K 3/04 : Carbon
• CPC Class Codes: C08K 5/0041 : Optical brightening agents, organic pigments
• CPC Class Codes: C08K 5/18 : with aromatically bound amino groups
• CPC Class Codes: C08L 2203/16 : used for films
• CPC Class Codes: C08L 2205/02 : containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 33/12 : Homopolymers or copolymers of methyl methacrylate

Abstract

A black film containing a thermoplastic resin (A) that contains two or more types of dyes other than black, where a thickness T is 45 to 550 μm, a total concentration C of the dyes other than black is 0.4 to 5 mass % with respect to the thermoplastic resin (A), the total concentration C of the dyes and the thickness T satisfy the following expression (1):
C×T≥210  (1)

• • where in a L*a*b* color system measurement compliant with JIS Z 8781-4, L* (lightness) is no more than 10, an absolute value of a* is no more than 2.0, and an absolute value of b* is no more than 2.0, and a total light transmittance obtained after the black film is stretched twofold in one axial direction at a temperature higher than a glass transition temperature by 20° C. is no more than 3.0%.

Claims

1. A black film comprising:

a thermoplastic resin (A) comprising two or more types of dyes other than black, wherein

a thickness T is 45 to 550 μ

m,

the thermoplastic resin (A) is a composition containing a methacryl-based polymer (A1) in which the content of a structural unit derived from methyl methacrylate is no less than 90 mass % and the content of a structural unit derived from an acrylic acid alkyl ester having a carbon number of 6 to 12 is less than 5 mass % and an acryl-based copolymer (A2) in which the content of a structural unit derived from an acrylic acid alkyl ester having a carbon number of 6 to 12 is more than 5 mass %,

a mass ratio of the methacryl-based polymer (A1) to the acryl-based copolymer (A2) is in a range of from 98/2 to 50/50,

a total concentration C of the dyes other than black is 0.4 to 5 mass % with respect to the thermoplastic resin (A),

the total concentration C of the dyes and the thickness T satisfy the following expression (1);

C×

T≥

210 

 

(1)

wherein in a L*a*b* color system measurement compliant with JIS Z 8781-4, L* (lightness) is no more than 10, an absolute value of a* is no more than 2.0, and an absolute value of b* is no more than 2.0, and

a total light transmittance obtained after the black film is stretched twofold in one axial direction at a temperature higher than a glass transition temperature by 20°

C. is no more than 3.0%.

2. The black film according to claim 1, further comprising a surface protection layer comprising a transparent thermoplastic resin (B),

wherein a total thickness is 45 to 550 μ

m.

3. The black film according to claim 1, wherein the thermoplastic resin (A) and/or the transparent thermoplastic resin (B) are/is a methacrylic resin.

4. The black film according to claim 3, wherein

the methacrylic resin comprises an acryl-based copolymer (A2) having a structural unit derived from an acrylic acid alkyl ester having a carbon number of 6 to 12, and

a content of the structural unit derived from the acrylic acid alkyl ester having a carbon number of 6 to 12 is 2.5 to 25.0 mass % with respect to the methacrylic resin.

5. A method of manufacturing the black film according to claim 1, comprising extrusion molding through a polymer filter.

6. A decorative molded product, wherein the black film according to claim 1 is laminated on a surface of a base material.

7. The black film according to claim 1, wherein the acryl-based copolymer (A2) contains a multilayer structure rubber particle composed of a graft copolymer.

8. The black film according to claim 7, wherein the multilayer structure rubber particle has a cross-link polymer layer containing a structural unit derived from an acrylic acid alkyl ester having a carbon number of 6 to 12 and is a multilayer structure rubber particle (Y) having a particle size of 0.05 to 0.3 μ

m.