Multi-layer tube and process of making the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B29B-011/14
B29B-011/10
B29C-047/06
B29C-049/00
B29C-049/04
B29C-049/22
B65D-081/38
C08J-009/06
C08J-009/12
B32B-005/20
B32B-001/02
B32B-001/00
B65D-001/02
B65D-001/12
B29C-047/00
B32B-007/02
B32B-027/08
B32B-027/30
B32B-027/32
B29K-023/00
B29L-031/00
B29K-105/00
B29K-105/12
B29K-223/00
B29L-023/00
B29C-047/56
B29K-105/04
B29C-049/48
B29C-049/62
B29L-009/00
출원번호
US-0061005
(2016-03-04)
등록번호
US-10173359
(2019-01-08)
발명자
/ 주소
Sun, David Dezhou
Driskill, Philip A
Minnette, Jeffrey C
Surti, Birju A
Williams, Jonathan K
Cain, Tony
Marret, Diane E
Waterman, Jared B
Mackey, Dan L
Wilson, Debra R
Ponrathnam, Timothy S
출원인 / 주소
Berry Plastics Corporation
대리인 / 주소
Barnes & Thornburg LLP
인용정보
피인용 횟수 :
0인용 특허 :
60
초록▼
A vessel is configured to hold a product in an interior region formed in the vessel. The vessel includes an inner layer arranged to define the interior region and an outer layer. The vessel is formed using a blow-molding process in which a multi-layer parison is blow molded to form the vessel. The m
A vessel is configured to hold a product in an interior region formed in the vessel. The vessel includes an inner layer arranged to define the interior region and an outer layer. The vessel is formed using a blow-molding process in which a multi-layer parison is blow molded to form the vessel. The multi-layer parison is formed in an extrusion process in which a number of extruders are arranged to co-extrude associated inner and outer parisons to establish the multi-layer parison.
대표청구항▼
1. A method of producing a multi-layer tube, the method comprising extruding an inner-layer formulation to form an inner parison,extruding a core-layer formulation comprising a high density polyethylene (HDPE) resin to form a core parison,extruding an outer-layer formulation to form an outer parison
1. A method of producing a multi-layer tube, the method comprising extruding an inner-layer formulation to form an inner parison,extruding a core-layer formulation comprising a high density polyethylene (HDPE) resin to form a core parison,extruding an outer-layer formulation to form an outer parison,aligning the inner parison, the core parison, and the outer parison to cause the core parison to be located between the inner parison and the outer parsion to cause the core parison to surround the inner parison and to be surrounded by the outer parison to form an extruded multi-layer tube,wherein the core parison has a thickness that is about 45% to about 85% of a total thickness of the multi-layer tube andwherein the core-layer formulation further comprises a low density polyethylene (LDPE) base resin up to about 50% by weight of the core-layer formulation. 2. The method of claim 1, wherein the HDPE resin is about 60% to about 99% by weight of the core-layer formulation. 3. The method of claim 1, wherein the core parison is about 50% to about 85% of the total thickness of the multi-layer tube. 4. The method of claim 3, wherein the multi-layer tube has a cell count in the diagonal of about 0.9×106 to about 3.5×106 cells per cubic inch. 5. The method of claim 4, wherein the core parison has a density of about 0.2 g/cm3 to about 0.5 g/cm3. 6. The method of claim 4, wherein the inner-layer formulation and the outer-layer formulation each comprise a different HDPE resin. 7. The method of claim 6, wherein the core-layer formulation comprises a physical blowing agent. 8. The method of claim 1, wherein the inner parison has a first thickness and the outer parison has a second thickness. 9. The method of claim 8, wherein the first thickness of the inner parison is about the same as the second thickness of the outer parison. 10. The method of claim 8, wherein the thickness of the core parison is greater than the thickness of the outer parison. 11. The method of claim 8, wherein the first thickness of the inner parison and the second thickness of the outer parison are different. 12. The method of claim 11, wherein the core-layer formulation comprises a chemical blowing agent. 13. The method of claim 1, wherein the step of extruding a core-layer formulation includes introducing a physical blowing agent to the core-layer formulation. 14. The method of claim 13, wherein the multi-layer tube has a cell count in the diagonal of about 1.2×106 to about 3.5×106 cells per cubic inch. 15. The method of claim 14, wherein the outer-layer formulation further comprises a fiber. 16. The method of claim 15, wherein the outer-layer formulation further comprises an impact modifier. 17. A method of producing a multi-layer tube, the method comprising extruding an inner-layer formulation to form an inner parison,extruding a core-layer formulation comprising an HDPE resin to form a core parison,extruding an outer-layer formulation to form an outer parison,aligning the inner parison, the core parison, and the outer parison to cause the core parison to be located between the inner parison and the outer parison to cause the core parison to surround the inner parison and to be surrounded by the outer parison to form an extruded multi-layer tube,wherein the core parison has a density that is less than a density of each of the inner parison and the outer parison andwherein the core parison has a density of about 0.2 g/cm3 to about 0.5 g/cm3. 18. The method of claim 17, wherein the multi-layer tube has a cell count in the diagonal of about 0.9×106 to about 3.5×106 cells per cubic inch. 19. The method of claim 18, wherein the core parison has a density of about 0.25 g/cm3 to about 0.4 g/cm3. 20. The method of claim 19, wherein the core-layer formulation further comprises LDPE. 21. The method of claim 20, wherein the step of extruding a core-layer formulation includes introducing a physical blowing agent to the core-layer formulation. 22. The method of claim 19, wherein the outer-layer formulation further comprises an impact modifier. 23. The method of claim 22, wherein the inner-layer formulation and the outer-layer formulation each comprise a different HDPE resin. 24. The method of claim 18, wherein the multi-layer tube has a cell count in the diagonal of about 1×106 to about 3×106 cells per cubic inch. 25. The method of claim 24, wherein the multi-layer tube has a cell count in the diagonal of about 1.2×106 to about 2.2×106 cells per cubic inch. 26. The method of claim 17, wherein the multi-layer tube has a density of about 0.6 g/cm3 to about 0.8 g/cm3. 27. The method of claim 26, wherein the multi-layer tube has a density of about 0.65 g/cm3 to about 0.75 g/cm3.
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