Composite container with membrane and bead closure system
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B65D-043/02
출원번호
US-0436169
(2003-05-12)
발명자
/ 주소
Williams, Alan D.
Drummond, Michael T.
출원인 / 주소
Sonoco Development, Inc.
대리인 / 주소
Alston &
인용정보
피인용 횟수 :
25인용 특허 :
23
초록▼
A composite container of paperboard has a polymeric film barrier layer on the inner surface thereof. A rolled bead is formed at a top end of the container and a membrane closure is bonded to the bead by a first heat seal material on the bead and a second heat seal material on the membrane. The heat
A composite container of paperboard has a polymeric film barrier layer on the inner surface thereof. A rolled bead is formed at a top end of the container and a membrane closure is bonded to the bead by a first heat seal material on the bead and a second heat seal material on the membrane. The heat seal materials preferably comprise ethylene acid copolymer such as methacrylic acid or acrylic acid, partially neutralized with zinc or sodium ions. A primer layer is disposed between the heat seal material on the bead and the polymer barrier layer of the container. The primer provides a high z-direction bond strength but is designed to fail in a shear tearing mode when peeling the membrane from the bead, such that the heat seal material on the bead is detached from the bead and remains attached to the membrane. The primer prevents tearing of the polymer barrier layer of the container.
대표청구항▼
1. A composite container, comprising:a container body comprising from one to a plurality of paperboard plies wrapped about an axis and adhered together to form a tubular body wall of the container body, the tubular body wall having an inner surface and an outer surface, and a substantially fluid-imp
1. A composite container, comprising:a container body comprising from one to a plurality of paperboard plies wrapped about an axis and adhered together to form a tubular body wall of the container body, the tubular body wall having an inner surface and an outer surface, and a substantially fluid-impervious liner covering and adhered to the inner surface of the tubular body wall, the liner comprising a non-foil-based polymer liner having a polymer film barrier layer; a rolled bead formed at least at one end of the container body; a flexible membrane closure seated to an end surface of the bead for closing the one end of the container body, a first heat seal material being disposed on the end surface of the bead, a second heat seal material being disposed on the membrane closure and cooperating with the first heat seal material to seal the membrane closure onto the bead; wherein the first heat seal material is joined to the polymer film barrier layer of the liner by a primer layer disposed therebetween, the primer layer providing a relatively high z-direction bond strength between the first heat seal material and the barrier layer while providing a shear strength that is weaker than that between the first and second heat seal materials and weaker than that between the second heat seal material and the membrane closure such that peeling of the membrane closure from the end surface of the bead tends to cause the first heat seal material to remain attached to the membrane closure and to be detached from the barrier layer at the end surface of the bead. 2. The composite container of claim 1, wherein the barrier layer of the liner comprises a metallized polymer film.3. The composite container of claim 1, wherein the first heat seal material covers one entire surface of the barrier layer and forms an inner surface of the container that comes in contact with product contained in the container.4. The composite container of claim 1, wherein the barrier layer is selected from the group consisting of polypropylene, polyethylene terephthalate, and nylon.5. The composite container of claim 4, wherein the primer layer comprises a urethane primer system.6. The composite container of claim 5, wherein the first heat seal material comprises ethylene acid copolymer having acid groups partially neutralized with zinc or sodium ions.7. The composite container of claim 6, wherein the second heat seal material comprises ethylene acid copolymer having acid groups partially neutralized with zinc or sodium ions.8. The composite container of claim 5, wherein the barrier layer of the liner is metallized.9. The composite container of claim 1, wherein the first and second heat seal materials form an inner wedge and an outer wedge at a juncture between the membrane and the bead, the inner wedge being located radially inward of a heat seal area between the end surface of the bead and the membrane and the outer wedge being located radially outward of the heat seal area.10. The composite container of claim 9, wherein the inner wedge is larger than the outer wedge.11. The composite container of claim 1, wherein the primer is applied to the barrier layer in a partial-coverage pattern.12. The composite container of claim 11, wherein the pattern of primer creates a zone on the bead having a weaker bond between the barrier layer and the heat seal layer than at other locations on the bead.13. The composite container of claim 1, wherein the barrier layer is chemically treated and the primer is applied to the chemically treated barrier layer.14. A composite container body, comprising:from one to a plurality of paperboard plies wrapped about an axis and adhered together to form a tubular body wall of the container body, the tubular body wall having an inner surface and an outer surface, and a substantially fluid-impervious liner covering and adhered to the inner surface of the tubular body wall, the liner comprising a non-foil-based polymer liner having a polymer film barrier layer; a heat seal layer joined to the barrier layer so as to form an innermost surface of the container body; and a rolled bead formed at a top end of the container body, the heat seal layer thus being exposed at an end surface of the bead; wherein a primer is disposed between the heat seal layer and the barrier layer, the primer comprising a urethane, the primer creating a frangible bond between the heat seal layer and the barrier layer. 15. The container body of claim 14, wherein the heat seal layer comprises ethylene acid copolymer.16. The container body of claim 15, wherein the barrier layer is selected from the group consisting of polypropylene, polyethylene terephthalate, and nylon.17. The container body of claim 16, wherein the barrier layer is metallized.18. The container body of claim 16, wherein the barrier layer is oriented.19. The container body of claim 14, wherein the primer is applied to the barrier layer in a partial-coverage pattern.20. The container body of claim 19, wherein the pattern of primer creates a zone on the bead having a weaker bond between the barrier layer and the heat seal layer than at other locations on the bead.21. The container body of claim 14, wherein the barrier layer is chemically treated and the primer is applied to the chemically treated barrier layer.
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이 특허에 인용된 특허 (23)
Thomas ; Jr. John S. (Williamsburg VA), Clamped-wave lid seal structure.
Drummond Michael T. ; Williams Alan D. ; Osman Rick A. ; Gentile Michael ; Krishnaraj Varadarajan, Container with heat seal surface having a substantially planar portion.
Scanga Theodore P. (Lower Burrell PA) Kiley Matthew P. (Tarentum PA) Metz Robert J. (Pittsburgh PA) Schultz Fred R. (Lower Burrell PA), Retortable container with easily-openable lid.
Drummond Michael T. ; Williams Alan D. ; Boatwright Floyd H. ; Schuetz Jeffrey M., Tubular container with a heat seal having non-symmetrical inner and outer beads.
Compton, Stephen F.; Bowen, Joe Milton; Calvert, Steven T.; Carrouth, Andrew B.; Caudle, Timothy G.; Ackerman, David L.; Conner, Howard Dean; Cook, Hubert J.; Kiss, Csaba Frank; Moehlenbrock, Andrew W., Dispensing system, packaging system, package, closure system, dispensing gun system, method of making a package, and method of dispensing a product.
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