Laminate, packaging, method for manufacturing a laminate, and method for manufacturing a packaging

Abstract

To provide a laminate capable of preventing a variation occurring in a depth of a laser processing mark when manufacturing a number of laminates or packages, and also to provide a package, a manufacturing method of a laminate, and a manufacturing method of a package.SOLUTION: A laminate includes a substrate layer 11 containing polyethylene terephthalate and a sealant layer 13 having thermoplasticity. The substrate layer 11 includes a first face 10F being an outermost surface of the laminate. The laminate includes a brittle part 15 linearly extending when viewed from a position facing the first face 10F. The brittle part 15 includes a laser processing mark 16 cut towards an inside of the laminate from the first face 10F. The polyethylene terephthalate includes polyethylene terephthalate containing a terephthalic acid and an isophthalic acid in a dicarboxylic acid unit within a repeating unit.SELECTED DRAWING: Figure 2

Claims

1. A substrate layer containing chemically recycled polyethylene terephthalate, A laminate comprising a thermoplastic sealant layer, The substrate layer comprises the outermost surface of the laminate, The laminate has a weak portion that extends linearly when viewed from a position opposite the outermost surface, The weak portion includes a laser processing mark that is cut from the outermost surface toward the interior of the laminate, The substrate layer comprises a first layer made of chemically recycled polyethylene terephthalate and a second layer made of virgin polyethylene terephthalate. The first layer is located closer to the outermost surface than the second layer. Laminated structure.

2. Equipped with a printing layer The laminate according to claim 1.

3. The sealant layer comprises a cyclic olefin copolymer. The laminate according to claim 1 or 2.

4. The sealant layer contains a light-shielding agent. The laminate according to any one of claims 1 to 3.

5. The barrier layer is further sandwiched between the substrate layer and the sealant layer. The laminate according to any one of claims 1 to 4.

6. The barrier layer includes a vapor-deposited film made of aluminum, aluminum oxide, and silicon oxide, or a resin film containing an ethylene-vinyl acetate copolymer saponified product. The laminate according to claim 5.

7. The system further comprises an intermediate layer sandwiched between the substrate layer and the sealant layer, The laser-processed marks have ends in the thickness direction of the laminate within the intermediate layer. The laminate according to any one of claims 1 to 4.

8. The aforementioned chemically recycled polyethylene terephthalate contains terephthalic acid and isophthalic acid in the dicarboxylic acid units within the repeating units. The laminate according to any one of claims 1 to 7.

9. The proportion of isophthalic acid in the total dicarboxylic acid units of polyethylene terephthalate contained in the substrate layer is 0.5 mol% or more and 5 mol% or less. The laminate according to claim 8.

10. The intrinsic viscosity of the polyethylene terephthalate contained in the substrate layer is 0.58 dl / g or more and 0.80 dl / g or less. The laminate according to any one of claims 1 to 9.

11. The width of the laser-processed mark extends from the sealant layer toward the outermost surface. The laminate according to any one of claims 1 to 10.

12. A packaging body composed of a laminate according to any one of claims 1 to 11, The sealant layers have a peripheral portion that is fused together, The vulnerable portion is located at the intended opening position in the packaging. packaging.

13. A method for manufacturing a laminate, comprising irradiating a film in which a substrate layer containing chemically recycled polyethylene terephthalate and a thermoplastic sealant layer are laminated with a laser to form a weak portion in the film, The substrate layer has the outermost surface of the film and comprises a first layer made of chemically recycled polyethylene terephthalate and a second layer made of virgin polyethylene terephthalate, wherein the first layer is located closer to the outermost surface than the second layer. The laser is irradiated onto the film from a position opposite to the substrate layer. A method for manufacturing laminates.

14. A method for manufacturing a packaging body, comprising irradiating a film in which a base layer containing chemically recycled polyethylene terephthalate and a thermoplastic sealant layer are laminated with a laser to form a weak area in the film, and fusing the sealant layers together, The substrate layer has the outermost surface of the film and comprises a first layer made of chemically recycled polyethylene terephthalate and a second layer made of virgin polyethylene terephthalate, wherein the first layer is located closer to the outermost surface than the second layer. The laser is irradiated onto the film from a position opposite to the substrate layer. A method for manufacturing packaging.

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