Claims
- 1. An oriented polymeric in-mold label film comprising first and second laminae which provide said film with a top layer at a face side of the film and a base layer at a back side of the film, said top layer being ink-printable and said base layer comprising a heat-activatable adhesive, at least said first lamina being hot-stretched and annealed, said first and second laminae being combined to form said film as a linerless self-wound film, the heat shrinkability at each side of the film being balanced to a sufficient extent to limit curling of the film, said wound film being unwindable and processable, as a free self-supporting dimensionally stable film, through a printing press, heat-generating ink drying means, and die-cutting means.
- 2. A film as in claim 1, wherein said top layer and said base layer each contain a major proportion comprising a blend of an olefin polymer and a copolymer of an olefin monomer with an ethylenically unsaturated carboxylic acid or an ethylenically unsaturated carboxylic acid ester comonomer.
- 3. A film as in claim 1, wherein said top layer and said base layer each contain a major proportion comprising a blend of a polypropylene polymer and a copolymer of an ethylene monomer with an ethylenically unsaturated carboxylic acid or an ethylenically unsaturated carboxylic acid ester comonomer.
- 4. A film as in claim 1, wherein said top layer and said base layer each contain more than 50% by weight of a blend of a polypropylene polymer and an ethylene-vinyl acetate copolymer.
- 5. A film as in claim 1, wherein said film has a machine direction Gurley stiffness value in the range of from about 40 to about 130 and a cross direction Gurley stiffness value in the range of from about 20 to about 65.
- 6. A film as in claim 1, wherein said film has a machine direction tensile modulus value greater than about 65,000 psi.
- 7. A film as in claims 1, wherein said film has a machine direction Gurley stiffness value greater than about 40.
- 8. A film as in claim 7, wherein said film has a machine direction elongation at break less than about 850%.
- 9. A film as in claim 8, wherein said film has a sufficiently high tensile modulus and stiffness value in the machine direction to enable it to withstand the mechanical and thermal stresses of conventional printing processes including film tension loads of about three pounds per linear inch of film width at temperatures ranging from about 70 degrees F. to about 150 degrees F.
- 10. A film as in claim 1, wherein said base layer includes an antistat agent.
Parent Case Info
This is a division of application Ser. No. 08/448,899, filed May 17, 1995, U.S. Pat. No. 5,733,615, which is a CIP of Ser. No. 07/756,556 filed Sep. 9, 1991, U.S. Pat. No. 5,242,650.
US Referenced Citations (24)
Foreign Referenced Citations (4)
Number |
Date |
Country |
2012357 |
Mar 1990 |
CAX |
2-217223 |
Aug 1990 |
JPX |
2201681A |
Sep 1988 |
GBX |
9304842 |
Mar 1993 |
WOX |
Non-Patent Literature Citations (1)
Entry |
Opticite label films--Printing; Dow Chemical U.S.A. Films Group, Form No. 500-1087-1085, pp. 1-16. |
Divisions (1)
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Number |
Date |
Country |
Parent |
446899 |
May 1995 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
756556 |
Sep 1991 |
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