GB1532180A - Trilaminate film for forming sideweld bags - Google Patents

Trilaminate film for forming sideweld bags

Info

Publication number
GB1532180A
GB1532180A GB40570/77A GB4057077A GB1532180A GB 1532180 A GB1532180 A GB 1532180A GB 40570/77 A GB40570/77 A GB 40570/77A GB 4057077 A GB4057077 A GB 4057077A GB 1532180 A GB1532180 A GB 1532180A
Authority
GB
United Kingdom
Prior art keywords
film
propylene
thickness
block copolymer
core layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB40570/77A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
James River Corp of Nevada
Original Assignee
Crown Zellerbach Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Crown Zellerbach Corp filed Critical Crown Zellerbach Corp
Publication of GB1532180A publication Critical patent/GB1532180A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/70—Scrap or recycled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/02—Open containers
    • B32B2439/06—Bags, sacks, sachets

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Laminated Bodies (AREA)

Abstract

1532180 Laminates CROWN ZELLERBACH CORP 29 Sept 1977 [22 Oct 1976] 40570/77 Heading B5N A trilaminate film comprises a core layer of an ethylene-propylene block copolymer sandwiched between skin layers of polypropylene or an ethylene-propylene random copolymer having an ethylene content up to 4 mole per cent, the block copolymer being the homogeneous product resulting from the sequential polymerization of (1) propylene and (2) a mixture of propylene in the presence of a stereospecific polymerization catalyst, with the ethylene content of the block copolymer being from 5 to 10 mole per cent, the core layer having a thickness of from 30 to 90% of the film thickness and each skin layer having a thickness of from 5 to 55% of the film thickness. The film may be made by co-extrusion and may include recycled material, preferably in the core layer. Side-weld bags may be made from the film.
GB40570/77A 1976-10-22 1977-09-29 Trilaminate film for forming sideweld bags Expired GB1532180A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73485376A 1976-10-22 1976-10-22

Publications (1)

Publication Number Publication Date
GB1532180A true GB1532180A (en) 1978-11-15

Family

ID=24953347

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40570/77A Expired GB1532180A (en) 1976-10-22 1977-09-29 Trilaminate film for forming sideweld bags

Country Status (2)

Country Link
CA (1) CA1103140A (en)
GB (1) GB1532180A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5625445A (en) * 1979-08-09 1981-03-11 Sumitomo Bakelite Co Polypropylene laminated sheet and its molding
US4384024A (en) 1981-03-19 1983-05-17 Imperial Chemical Industries Limited Composite heat-sealable films
EP0630747A2 (en) * 1993-06-28 1994-12-28 Sumitomo Chemical Company, Limited Multilayer wrapping films

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5625445A (en) * 1979-08-09 1981-03-11 Sumitomo Bakelite Co Polypropylene laminated sheet and its molding
JPS6241110B2 (en) * 1979-08-09 1987-09-01 Sumitomo Bakelite Co
US4384024A (en) 1981-03-19 1983-05-17 Imperial Chemical Industries Limited Composite heat-sealable films
EP0630747A2 (en) * 1993-06-28 1994-12-28 Sumitomo Chemical Company, Limited Multilayer wrapping films
EP0630747A3 (en) * 1993-06-28 1995-03-01 Sumitomo Chemical Co Multilayer wrapping films.
US5462777A (en) * 1993-06-28 1995-10-31 Sumitomo Chemical Company, Limited Wrapping multilayer film

Also Published As

Publication number Publication date
CA1103140A (en) 1981-06-16

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920929