Self heat sealable packaging and a method for making same
The present invention is directed to saturants for fibrous webs that will confer upon those webs the ability to be heat sealed to many materials without compromising the drapability of the fibrous webs. The present invention is further directed to fibrous webs saturated with the saturant of the present invention and methods for saturating such webs. The invention is further directed to packages or containers comprising the saturated webs and methods of manufacturing such packages. The invention is further directed to temperature sensitive adhesive coatings that can be used with the saturated webs and a method for applying the coating.
1. A medical package comprising a base component sealed to a fibrous web, the fibrous web being saturated with a composition comprising a blend of a latex polymer having a glass transition temperature of 10° C. or less and a heat-sealable polymer comprising a homopolymer or heteropolymer of a lower alkene, wherein the fibrous web has a Gurley stiffness of less than about 165 milligrams in the machine direction and a seal strength of at least about 0.70 pound per inch.
2. The medical package of claim 1 , wherein the base component is impervious to bacteria.
3. The medical package of claim 1 , wherein the base component is formed from nylon, polyester, polypropylene, polyethylene, polystyrene, or combinations thereof.
4. The medical package of claim 1 , wherein the base component includes a film.
5. The medical package of claim 1 , wherein the Gurley stiffness of the fibrous web is less than about 145 milligrams in the machine direction.
6. The medical package of claim 1 , wherein the Gurley stiffness of the fibrous web is less than about 100 milligrams in the cross direction.
7. The medical package of claim 1 , wherein the latex polymer is an acrylic polymer.
8. The medical package of claim 1 , wherein the heat-sealable polymer comprises polyethylene, polypropylene, ethylene acrylic acid, ethylene vinyl acetate, or combinations thereof.
9. The medical package of claim 1 , wherein the fibrous web includes cellulosic fibers.
10. The medical package of claim 1 , wherein the percent add-on of the composition is at least package 25%.
11. The medical package of claim 1 , wherein the fibrous web has a Gurley porosity of less than about 120 seconds per 100 cubic centimeters.
12. A medical package comprising a base component heat-sealed to a fibrous web, the fibrous web containing cellulosic fibers and being saturated with a composition comprising a blend of an acyrlic latex polymer and a homopolymer or heteropolymer of a lower alkene, wherein the fibrous web has Gurley stiffness of less than about 145 milligrams in the machine direction and a seal strength of at least about 0.70 pound per inch.
13. The medical package of claim 12 , wherein the base component is impervious to bacteria.
14. The medical package of claim 12 , wherein the base component is formed from nylon, polyester, polypropylene, polyethylene, polystyrene, or combinations thereof.
15. The medical package of claim 12 , wherein the Gurley stiffness of the fibrous web is less than about 100 milligrams in the cross direction.
16. The medical package of claim 12 , wherein the acrylic latex polymer has a glass transition temperature of about 10° C. or lower.
17. The medical package of claim 12 , wherein the heat-sealable polymer comprises polyethylene, polypropylene, ethylene acrylic acid, ethylene vinyl acetate, or combinations thereof.
18. The medical package of claim 12 , wherein the percent add-on of the composition is at least about 25%.
19. The medical package of claim 12 , wherein the fibrous web has a Gurley porosity of less than about 120 seconds per 100 cubic centimeters.
20. The medical package comprising a base component heat-sealed to a fibrous web, the fibrous web containing cellulosic fibers and being saturated with a composition comprising a blend of an acrylic latex polymer and a heat-sealable polymer selected from the group consisting of polyethylene, polypropylene, ethylene acrylic acid, ethylene vinyl acetate, and combinations thereof, the percent add-on of the composition being at least about 25%, wherein the fibrous web has a Gurley stiffness less than about 165 milligrams in the machine direction, a Gurley porosity of less than about 120 seconds per 100 cubic centimeters, and a seal strength of at least about 0.70 pound per inch.