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US 12,742,290 B2Granted
Laminate and roll
AssigneeToppan Holdings Inc.
InventorsYumiko Kojima, Junichi Kaminaga, Yoshiki Koshiyama, Rika Ishii, Hiroyuki Wakabayashi
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Abstract
A laminate including: a paper substrate; a coating layer containing a polyolefin resin; and a plurality of particles fixed to the coating layer, in which a particle diameter of the particles is greater than a thickness of the coating layer.
Claims8
A laminate comprising:
- a paper substrate;
- a clay coating disposed on the paper substrate;
- a coating layer containing a polyolefin resin disposed directly on the clay coating,
- wherein a thickness of the coating layer is 1 to 5 μm;
- and
- a plurality of particles fixed to the coating layer, wherein a material of the particles is one selected from the group consisting of polyolefin and a partially modified product thereof,
- wherein an average particle diameter of the particles is greater than the thickness of the coating layer, wherein the average particle diameter of the particles is 1.2 to 6.5 μm, and
- wherein a peeling strength is 0.1 N/15 mm or less when the peeling strength is measured through steps of:
- (a1) accommodating a sample from stacking five sheets of the laminates facing a same direction in a constant-temperature bath set at 40° C. for 3 days in a state in which a load of 100 kgf is applied to the sample;
- (b1) peeling off two sheets of laminates together from the sample after the step (a1);
- and
- (c1) implementing a T-type peeling test on the two sheets of laminates at a peeling rate of 300 mm/minute.
9 more elements
A laminate comprising:
- a paper substrate;
- a clay coating disposed on the paper substrate;
- a coating layer containing a polyolefin resin disposed directly on the clay coating,
- wherein a thickness of the coating layer is 1 to 5 μm;
- and
- a plurality of particles fixed to the coating layer, wherein a material of the particles is one selected from the group consisting of polyolefin and a partially modified product thereof,
- wherein an average particle diameter of the particles is greater than the thickness of the coating layer, wherein the average particle diameter of the particles is 1.2 to 6.5 μm,
- wherein a peeling strength is 0.1 N/15 mm or less when the peeling strength is measured through steps of:
- (a1) accommodating a sample from stacking five sheets of the laminates facing a same direction in a constant-temperature bath set at 40° C. for 3 days in a state in which a load of 100 kgf is applied to the sample;
- (b1) peeling off two sheets of laminates together from the sample after the step (a1);
- and
- (c1) implementing a T-type peeling test on the two sheets of laminates at a peeling rate of 300 mm/minute;
- and
- wherein a heat-seal strength is 2.1 N/15 mm or more when the heat-seal strength is measured through steps of:
- (a2) accommodating a sample from stacking five sheets of the laminates facing a same direction in a constant-temperature bath set at 40° C. for 3 days in a state in which a load of 100 kgf is applied to the sample;
- (b2) peeling off two sheets of laminates separately from the sample after the step (a2);
- (c2) heat-sealing the coating layers of the two sheets of laminates in a condition of a pressure of 0.2 MPa, a temperature of 120° C., and a time for 1 second;
- and
- (d2) implementing a T-type peeling test on a sample obtained in the step (c2) at a peeling rate of 300 mm/minute.
16 more elements
Dependencies are inferred from the claim text.