Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1989-04-18
1991-07-09
Pianalto, Bernard
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
427 5, 427245, 427256, 4273855, 4283179, B32B 326
Patent
active
050305107
ABSTRACT:
A packaging material for packing boxes, packing bags and wrapping paper characterized in that a surface of the packaging material is coated with an air pervious tight coating. The coating partially or entirely covers the surface intended for contact with the wrapped contents, and contains grains or minute particles of a freshness preservative substance which is a far-infrared radioactive substance emitting radiation of a wave length of about 3-4 .mu.m at room temperature, a gas adsorptive substance, a substance reactive with oxygen at room temperature or a mixture thereof.
Also disclosed is a method of fixing the freshness preservative substance on a packaging material characterized by printing, coating or spraying a coating onto a surface of the packaging material that is to be contacted with the wrapped contents. The coating is a liquid solution of a coating formative substance containing, dispersed therein, solid grains or minute particles of a freshness preservative substance which is a far-infrared radioactive substance emitting radiation of a wave length of about 3-14 .mu.m at room temperature, a gas adsorptive substance, a substance reactive with oxygen at room temperature or a mixture thereof.
Hanioka Mikio
Yokoyama Yoshimasa
Nippon Danbohru Co., Ltd.
Pianalto Bernard
Yokoyama Yoshimasa
LandOfFree
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