Patent ID: 11905662
Assignee: JUJO THERMAL OY
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D  B  C | IPC B  D

Claim 0:
1. A paper barrier material comprising:
a laminate consisting of a paper base material and a pigment coating layer wherein the laminate has an air permeation resistance of 2,500 seconds or lower as measured based on JAPAN TAPPI No. 5-2: 2000, said paper base material having a first principal face on a side opposite a side of the pigment coating layer, and said pigment coating layer having a second principal face on a side opposite the paper base material;
a seal layer provided on the first principal face; and
a gas barrier layer provided on the seal layer such that the seal layer is interposed between the gas barrier layer and the paper base material, wherein the gas barrier layer has gas barrier property and is comprised of a water-soluble polymer, wherein the seal layer is comprised of a pigment and a binder so as to block a coating solution for forming the gas barrier layer from being absorbed into laminate through the first principal face when the gas barrier layer is formed,
wherein the paper barrier material further comprises a heat-sealing layer for shaping the paper barrier material in a desired shape by heat-sealing, which is a layer of a thermoplastic resin provided as an outermost layer of the paper barrier material in a thickness direction.