Water-based hot-melt adhesive and medical paper coating with water-based hot melt adhesive
AssigneeBenQ Materials Corporation
InventorsYen-Ling Lin, Ching-Huang Chen
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Abstract
The present invention provides a water-based hot-melt adhesive for healthcare packaging. The water-based hot-melt adhesive includes 25 to 70 parts by weight of an ethylene vinyl acetate copolymer, 5 to 20 parts by weight of an ethylene acrylic acid copolymer, 6.5 to 55 parts by weight of a water-based paraffin, and 5 to 15 parts by weight of particulate wax, in which a particle size of particulate wax is less than 8 μm. A coating layer formed on a medical paper from the water-based hot-melt adhesive of the present invention has great gas-permeability. After the coating layer is sealed with flexible sheet or blister container at the peripheral edges thereof, it has satisfied seal strength and peelability.
Claims16
A water-based hot-melt adhesive, comprising:
- 30 parts by weight to 68 parts by weight of an ethylene vinyl acetate copolymer;
- 6 parts by weight to 18 parts by weight of an ethylene acrylic acid copolymer;
- 7 parts by weight to 52 parts by weight of a water-based paraffin;
- and 7 parts by weight to 13 parts by weight of a particulate wax, wherein a particle size of the particulate wax is less than 8 μm.
A water-based hot-melt adhesive coated medical paper comprises a medical paper and a water-based hot-melt adhesive coating layer coated on at least one surface of the medical paper, wherein the water-based hot-melt adhesive coating layer comprising:
- 30 parts by weight to 68 parts by weight of an ethylene vinyl acetate copolymer;
- 6 parts by weight to 18 parts by weight of an ethylene acrylic acid copolymer;
- 7 parts by weight to 52 parts by weight of a water-based paraffin;
- and 7 parts by weight to 13 parts by weight of a particulate wax, wherein a particle size of the particulate wax is less than 8 μm.
Dependencies are inferred from the claim text.