Packaging materials for tube containers, tube containers, and tube containers with caps

Abstract

To provide packaging materials for tube containers, tube containers, and tube containers with caps that can suppress quality deterioration. [Solution] The packaging material (50) for the tube container comprises a first sealant layer (51), a first paper substrate layer (52), and a second sealant layer (53), arranged sequentially from the outer surface (501) to the inner surface (502). The peel strength of the first paper substrate layer (52) after immersion testing is 0.40 N / 15 mm or more. The paper constituting the first paper substrate layer (52) is uncoated paper, and the uncoated paper is bleached paper, semi-bleached paper, or unbleached paper, and the basis weight of the paper is 70 g / m2 or more and 130 g / m2 or less.

Claims

1. In packaging materials for tube containers, It comprises a first sealant layer, a first paper substrate layer, and a second sealant layer, arranged sequentially from the outer surface to the inner surface. The peel strength of the first paper substrate layer after immersion testing with ethanol is 0.31 N / 15 mm or more and 0.93 N / 15 mm or less. The paper constituting the first paper substrate layer is uncoated paper, and the uncoated paper is bleached paper, semi-bleached paper, or unbleached paper. The basis weight of the aforementioned paper is 70 g / m². ２ 130g / m or more ２ The following are packaging materials for tube containers.

2. The packaging material for tube containers according to claim 1, wherein the peel strength of the first paper substrate layer before the immersion test is 0.65 N / 15 mm or more.

3. The packaging material for tube containers according to claim 1 or 2, wherein the peel strength of the first paper substrate layer after the immersion test is 60% or more of the peel strength of the first paper substrate layer before the immersion test.

4. The packaging material for tube containers according to any one of claims 1 to 3, wherein the thickness of the first paper substrate layer is 50 μm or more and 160 μm or less.

5. The packaging material for a tube container according to any one of claims 1 to 4, further comprising a second paper substrate layer provided between the first paper substrate layer and the second sealant layer, wherein the peel strength of the second paper substrate layer after an immersion test using ethanol is 0.59 N / 15 mm or more.

6. The packaging material for tube containers according to claim 5, wherein the peel strength of the second paper substrate layer before the immersion test is 0.90 N / 15 mm or more.

7. The packaging material for tube containers according to claim 5 or 6, wherein the peel strength of the second paper substrate layer after the immersion test is 60% or more of the peel strength of the second paper substrate layer before the immersion test.

8. The packaging material for tube containers according to any one of claims 5 to 7, wherein the thickness of the second paper substrate layer is 50 μm or more and 160 μm or less.

9. In a tube container, A body tube having a sealing portion formed by overlapping and joining opposing ends of a packaging material for a tube container according to any one of claims 1 to 8, A tube container comprising a head member joined to one end of the body tube.

10. In a tube container with a cap, The tube container according to claim 9, A capped tube container comprising a cap attached to the head member.

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