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Tung P Ma, 34Bronx, NY

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Us Patents

Repulpable, Water Repellant Paperboard

US Patent:
5635279, Jun 3, 1997
Filed:
Aug 15, 1994
Appl. No.:
8/290645
Inventors:
Tung C. Ma - Fort Lee NJ
Arnold L. Berzins - Westwood NJ
Charles J. Davis - Goshen NY
Bruce T. Watson - Shreveport LA
Assignee:
International Paper Company - Purchase NY
International Classification:
B32B 100
B05D 136
US Classification:
428174
Abstract:
Paperboard having a water-repellant coating which includes a polymer matrix/wax/pigment mixture and is applied to the paperboard as an aqueous formulation. The polymer matrix includes polymer chains which are ionically cross-linked through pendant carboxylic acid groups to provide, together with the wax and pigment components, a substantially continuous, water-repellant film which more readily breaks down under the alkaline conditions of repulping. The coated board also exhibits low slip and resistance to blocking, and is particularly well-suited in corrugated box constructions used in shipping containers for perishable food items such as meats, poultry, fishery products, fruits and vegetables. The pigmented or unpigmented coating formulations are also used as an overcoat over preprinted paperboard surfaces to simultaneously provide scuff and water resistance.

Repulpable, Water Repellant Paperboard

US Patent:
5626945, May 6, 1997
Filed:
Sep 28, 1993
Appl. No.:
8/128582
Inventors:
Arnold L. Berzins - Westwood NJ
Tung C. Ma - Fort Lee NJ
Charles J. Davis - Goshen NY
Assignee:
International Paper Company - Purchase NY
International Classification:
B32B 906
US Classification:
428174
Abstract:
The specification discloses paperboard having a water-repellant coating which includes a polymer matrix/wax mixture and is applied to the paperboard as an aqueous formulation. The polymer matrix includes polymer chains which are ionically cross-linked through pendant carboxylic acid groups to provide, together with the wax, a substantially continuous, water-repellant film which more readily breaks down under the alkaline conditions of repulping. The coated board also exhibits improved release characteristics and resistance to blocking, and is particularly well-suited in corrugated box constructions used in shipping containers for perishable food items such as meats, poultry, fishery products, fruits and vegetables.

Repulpable, Water Repellant Paperboard

US Patent:
6066379, May 23, 2000
Filed:
Jun 2, 1997
Appl. No.:
8/867251
Inventors:
Tung Chan Ma - Fort Lee NJ
Arnold L. Berzins - Westwood NJ
Charles J. Davis - Goshen NY
Bruce T. Watson - Shreveport LA
Assignee:
International Paper Company - Purchase NY
International Classification:
B32B 100
B32B 300
US Classification:
428 53
Abstract:
Paperboard having a water-repellant coating which includes a polymer matrix/wax/pigment mixture and is applied to the paperboard as an aqueous formulation. The polymer matrix includes polymer chains which are ionically cross-linked through pendant carboxylic acid groups to provide, together with the wax and pigment components, a substantially continuous, water-repellant film which more readily breaks down under the alkaline conditions of repulping. The coated board also exhibits low slip and resistance to blocking, and is particularly well-suited in corrugated box constructions used in shipping containers for perishable food items such as meats, poultry, fishery products, fruits and vegetables. The pigmented or unpigmented coating formulations are also used as an overcoat over preprinted paperboard surfaces to simultaneously provide scuff and water resistance.

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