Laminate

• US 20090181244A1
• Filed: 03/06/2009
• Published: 07/16/2009
• Est. Priority Date: 09/08/2006
• Status: Abandoned Application

• Current Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Original Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Inventors: Nakanishi, Noritada, Ishii, Toshiya, Matsuo, Ryukichi, Fukugami, Miki, Murase, Tomokazu
• Application Number:
  US12/382,065
• Publication Number:
  US 20090181244A1
• Time in Patent Office: Days
• US Class Current: 428/336
• 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 2255/20 Inorganic coating
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2255/28 Multiple coating on one surface
• CPC Class Codes: B32B 2307/31 Heat sealable
• CPC Class Codes: B32B 2307/50 having particular mechanical properties
• CPC Class Codes: B32B 2307/7242 Non-permeable
• CPC Class Codes: B32B 2307/734 Dimensional stability
• CPC Class Codes: B32B 2553/00 Packaging equipment or accessories not otherwise provided for
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/16 specially treated, e.g. irradiated
• CPC Class Codes: B32B 27/18 characterised by the use of special additives
• CPC Class Codes: B32B 27/281 comprising polyimides
• CPC Class Codes: B32B 27/30 comprising vinyl (co)polymers; comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/306 comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/34 comprising polyamides
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 27/365 comprising polycarbonates
• CPC Class Codes: B32B 27/38 : comprising epoxy resins
• CPC Class Codes: Y10T 428/265 : 1 mil or less
• CPC Class Codes: Y10T 428/31504 : Composite [nonstructural laminate]
• CPC Class Codes: Y10T 428/3175 : Next to addition polymer from unsaturated monomer[s]
• CPC Class Codes: Y10T 428/31786 : Of polyester [e.g., alkyd, etc.]
• CPC Class Codes: Y10T 428/31797 : Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31855 : Of addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31909 : Next to second addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31938 : Polymer of monoethylenically unsaturated hydrocarbon

Abstract

A laminate prepared by pretreating at least one side of a substrate of a plastic film by plasma treatment and then directly laminating a thermoplastic resin on a surface treated by pretreatment.

Claims

1. A laminate prepared by pretreating at least one side of a substrate of a plastic film by plasma treatment and then directly laminating a thermoplastic resin on a surface treated by pretreatment.

2. The laminate according to claim 1, wherein the substrate comprises a plastic film provided on one side thereof with a deposited layer.

3. The laminate according to claim 1, wherein the surface of the substrate is further provided with a gas barrier coating layer.

4. The laminate according to claim 1, wherein, when peeling of the substrate and the thermoplastic resin layer is performed while penetrating water, the treated surface of the substrate is peeled through cohesion failure.

5. The laminate according to claim 1, wherein the plasma treatment is a treatment by reactive ion etching (RIE) which is a treatment with low-temperature plasma where a self-bias value is set to 200 V or more to 2000 V or less and an Ed value defined by Ed=(plasma density)×

(treatment time) is set to 100 W·

m<sup>−

2</sup>·

s or more to 10000 W·

m<sup>−

2</sup>·

s or less.

6. The laminate according to claim 1, wherein the thermoplastic resin contains one or more resins selected from the group consisting of a low-density polyethylene resin, a high-density polyethylene resin, a medium-density polyethylene resin, an ethylene-vinyl acetate copolymer, an ethylene-α

-olefin copolymer, an ethylene-α

,β

-unsaturated carboxylic acid copolymer and its esterified product or ionic crosslinked product thereof, a polypropylene resin, a propylene-α

-olefin copolymer, an acid anhydride-modified polyolefin, and an epoxy-modified polyolefin.

7. The laminate according to claim 1, wherein the substrate is formed of a polyethylene terephthalate film, and when a surface of the polyethylene terephthalate film after pretreatment by reactive ion etching is measured by X-ray photoelectron spectroscopy under conditions of an X-ray source of MgKα

and an output power of 100 W, an element ratio (O/C) is 0.49 or less.

8. The laminate according to claim 1, wherein the substrate is formed of a polyethylene terephthalate film, and when a surface of the polyethylene terephthalate film after pretreatment by reactive ion etching is measured by X-ray photoelectron spectroscopy under conditions of an X-ray source of MgKα

and an output power of 100 W, a functional group ratio (COO/C—

C) as determined by analysis of C1s waveform is 0.33 or less.

9. The laminate according to claim 1, wherein the substrate is formed of a polyethylene terephthalate film, and when a surface of the polyethylene terephthalate film after pretreatment by reactive ion etching is measured by X-ray photoelectron spectroscopy under conditions of an X-ray source of MgKα

and an output power of 100 W, a half width of C—

C bond as determined by analysis of C1s waveform is 1.340 to 1.560 eV.

10. The laminate according to claim 1, wherein the substrate is formed of a polyamide film, and when a surface of the polyamide film after pretreatment by reactive ion etching is measured by X-ray photoelectron spectroscopy under conditions of an X-ray source of MgKα

and an output power of 100 W, an element ratio (O/(C+N)) is 0.2 or more.

11. The laminate according to claim 1, wherein the substrate is formed of a polyamide film, and when a surface of the polyamide film after pretreatment by reactive ion etching is measured by X-ray photoelectron spectroscopy under conditions of an X-ray source of MgKα

and an output power of 100 W, a half width of C—

C bond as determined by analysis of C1s waveform is 1.380 to 1.560 eV.

12. The laminate according to claim 1, wherein the substrate is formed of a polypropylene film, and when a surface of the polypropylene film after pretreatment by reactive ion etching is measured by X-ray photoelectron spectroscopy under conditions of an X-ray source of MgKα

and an output power of 100 W, an element ratio (O/C) is 0.03 to 0.135.

13. The laminate according to claim 1, wherein the substrate is formed of a polypropylene film, and when a surface of the polypropylene film after pretreatment by reactive ion etching is measured by X-ray photoelectron spectroscopy under conditions of an X-ray source of MgKα

and an output power of 100 W, a half width of C—

C bond as determined by analysis of C1s waveform is 1.320 to 1.600 eV.

14. The laminate according to claim 3, wherein a surface of the gas barrier coating layer is subjected to pretreatment by plasma treatment.

15. The laminate according to claim 14, wherein the gas barrier coating layer is a gas barrier coating layer containing a water-soluble polymer or a water-soluble polymer and an inorganic compound.

16. The laminate according to claim 14, wherein, when a surface of the gas barrier coating layer is measured by X-ray photoelectron spectroscopy (XPS), a functional group ratio D (C—

OH/C—

C) of a carbon-hydroxyl group bond (C—

OH) to a carbon-carbon bond (C—

C) in a water-soluble polymer is 0.25 or more to 0.87 or less.

17. The laminate according to claim 15, wherein the water-soluble polymer is polyvinyl alcohol.

18. The laminate according to claim 15, wherein the inorganic compound is a hydrolysis product of at least one metal alkoxide.

19. The laminate according to claim 14, wherein a deposited layer of an inorganic oxide with a thickness of 5 to 100 nm is disposed between a substrate body and the gas barrier coating layer.

20. The laminate according to claim 14, wherein a ratio D/D⁰ of a functional group ratio D of the gas barrier coating layer after pretreatment to a functional group ratio D⁰ thereof before pretreatment is 0.30 or more to 0.92 or less.