UST888001I4 - Composite film structure and method op makilg it - Google Patents

Composite film structure and method op makilg it Download PDF

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Publication number
UST888001I4
UST888001I4 US888001DH UST888001I4 US T888001 I4 UST888001 I4 US T888001I4 US 888001D H US888001D H US 888001DH US T888001 I4 UST888001 I4 US T888001I4
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United States
Prior art keywords
composite film
film structure
makilg
polyethylene
chlorination
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    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/12—Chemical modification

Definitions

  • thermoplastic films each selected from the group consisting of polyethylene, polypropylene, an ionic hydrocarbon polymer, polyethylene terephthalate and nylon, comprising: treating at least one of the film surfaces by flame, electrical discharge or chlorination to promote adhesion; compacting the treated surface together under moderate pressure (at least 25 pounds per square inch) and moderate heat (60 C.90 C.) to form a composite film structure; and Winding the composite film structure onto a core while under tension.
  • This composite film structure formed by this method has a bond strength of at least 25 grams per inch.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

A METHOD OF LAMINATING TWO OR MORE UNCOATED THEREMOPLASTIC FILMS, EACH SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE, POLYPROPYLENE, AN IONIC HYDROCARBON POLYMER, POLYETHYLENE TEREPHTHALATE AND NYLON, COMPRISING: TREATING AT LEAST ONE OF THE FILM SURFACES BY FLAME, ELECTRICAL DISCHARGE OR CHLORINATION TO PROMOTE ADHESIVE; COMPACTING THE TREATED SURFACE TOGETHER UNDER MODERATE PRESSURE (AT LEAST 25 POUNDS PER SQUARE INCH) AND MODERATE HEAT (60*C.-90*C.) TO FORM A COMPOSITE FILM STRUCTURE; AND WINDING THE COMPOSITE FILM STRUCTURE ONTO A CORE WHILE UNDER TENSION. THIS COMPOSITE FILM STRUCTURE FORMED BY THIS METHOD HAS A BOND STRENGTH OF AT LEAST 25 GRAMS PER INCH.

Description

nEEENsivE PULICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 O.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may he purchased for 30 cents a sheet.
Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.
PUBLISHED JULY 20, 1971 T888,00]l COMPOSITE FILM STRUCTURE AND METHOD OF MAKING IT George Marshall Drake, In, Richmond, Va, assignor to E. I. du Pont de Nemours and Company, Wilmington,
Del.
Filed Mar. 6, 1970, Ser. No. 17,243 Int. Cl. C09j 5/02 US. Cl. 156-306 1 Sheet Drawing. 13 Pages Specification A method of laminating two or more uncoated thermoplastic films, each selected from the group consisting of polyethylene, polypropylene, an ionic hydrocarbon polymer, polyethylene terephthalate and nylon, comprising: treating at least one of the film surfaces by flame, electrical discharge or chlorination to promote adhesion; compacting the treated surface together under moderate pressure (at least 25 pounds per square inch) and moderate heat (60 C.90 C.) to form a composite film structure; and Winding the composite film structure onto a core while under tension.
This composite film structure formed by this method has a bond strength of at least 25 grams per inch.
y 26, 171 G. M. DRAKE, JR COMPOSITE FILM STRUCTURE AND METHOD OF MAKLRG IT Filed March 6, 1970 y g m E. MIC
REP/IO .5J\ V/ 1 w INVENTOR GEORGE M. DRAKE, JR
ATTORNEY
US888001D 1970-03-06 1970-03-06 Composite film structure and method op makilg it Pending UST888001I4 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1724370A 1970-03-06 1970-03-06

Publications (1)

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UST888001I4 true UST888001I4 (en) 1971-07-20

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US888001D Pending UST888001I4 (en) 1970-03-06 1970-03-06 Composite film structure and method op makilg it

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US (1) UST888001I4 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3950206A (en) 1972-12-15 1976-04-13 Teijin Limited Method for heat-bonding polyester films or sheet-like structures and said polyester films or sheet-like structures
US4481669A (en) 1978-06-26 1984-11-06 W. R. Grace & Co., Cryovac Div. Multi-walled plastics bag
US4935089A (en) 1987-10-30 1990-06-19 W. R. Grace & Co.-Conn. Method of making a thermoformable barrier sheet
US5200123A (en) * 1990-10-17 1993-04-06 Hoechst Aktiengesellschaft Process for producing ultra thin thermoplastic films
US5335788A (en) * 1992-03-27 1994-08-09 Sonoco Products Company Self-opening polyethylene bag stack and process for producing same
US5562580A (en) * 1992-03-27 1996-10-08 Sonoco Products Company Self-opening polyethylene bag stack and process for producing same
US8202001B1 (en) 2006-01-26 2012-06-19 Chunhua Zhang Self-opening bag pack and method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3950206A (en) 1972-12-15 1976-04-13 Teijin Limited Method for heat-bonding polyester films or sheet-like structures and said polyester films or sheet-like structures
US4481669A (en) 1978-06-26 1984-11-06 W. R. Grace & Co., Cryovac Div. Multi-walled plastics bag
US4935089A (en) 1987-10-30 1990-06-19 W. R. Grace & Co.-Conn. Method of making a thermoformable barrier sheet
US5200123A (en) * 1990-10-17 1993-04-06 Hoechst Aktiengesellschaft Process for producing ultra thin thermoplastic films
US5335788A (en) * 1992-03-27 1994-08-09 Sonoco Products Company Self-opening polyethylene bag stack and process for producing same
US5562580A (en) * 1992-03-27 1996-10-08 Sonoco Products Company Self-opening polyethylene bag stack and process for producing same
US8202001B1 (en) 2006-01-26 2012-06-19 Chunhua Zhang Self-opening bag pack and method thereof

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