- Patent Number:
11851,539
- Appl. No:
17/311319
- Application Filed:
October 25, 2019
- Abstract:
A film structure including: (a) at least one functionalized film layer, wherein the at least one film layer comprises a polar-reactive group polyolefin layer used as an internal layer in the film structure; and (b) a lamination adhesive composition present on, and in contact with, a least a portion of a surface of the internal layer; wherein the green tack value of the adhesive composition is greater than 0.772 Newtons/centimeter; a laminate including the above film structure bonded to a substrate layer; a process for producing the film structure; a process for producing the laminate; and a laminated article made from the above laminate.
- Inventors:
DOW GLOBAL TECHNOLOGIES LLC; DOW QUIMICA DE COLOMBIA S.A.; ROHM AND HAAS COMPANY
- Assignees:
Dow Global Technologies LLC (Midland, MI, US), Dow Quimica de Colombia SA (Bogota, CO), Rohm and Haas Company (Collegeville, PA, US)
- Claim:
1. A film structure comprising: (a) at least one functionalized film layer, wherein the at least one functionalized film layer comprises a polar-reactive group polyolefin layer used as an internal lamination layer in the film structure; wherein the polar-reactive group polyolefin layer consists of a physical blend of an ethylene vinyl acetate polar copolymer and a grafted ethylene polar copolymer; and wherein the polar-reactive group has a functional group that comprises 0.15 wt. % to 1.5 wt % based on the total weight of the polyolefin layer; and (b) a lamination adhesive composition present on, and in contact with, a least a portion of a surface of the internal layer; wherein the chemical resistance value of the lamination adhesive composition is a bond strength sufficient for the laminate to withstand a measured adhesion force of at least 200 g-f/in when the laminate is subjected to a delamination test accompanied by a failure mode of tearing or no failure mode.
- Claim:
2. The film structure of claim 1 , wherein the at least one functionalized film layer is a monolayer.
- Claim:
3. The film structure of claim 1 , wherein the at least one functionalized film layer comprises a multilayer of two or more layers, wherein at least one of the two or more layers is an internal layer of a polar-reactive group polyolefin layer, and at least one of the two or more layers is an external layer.
- Claim:
4. The film structure of claim 1 , wherein the lamination adhesive composition is a general-purpose mono-component adhesive having predominantly isocyanate groups.
- Claim:
5. The film structure of claim 1 , wherein the polar-reactive group polyolefin layer consists of a physical blend of 35% of the ethylene vinyl acetate polar copolymer, based on the total weight of the polyolefin layer, and 65% of the grafted ethylene polar copolymer, based on the total weight of the polyolefin layer.
- Claim:
6. A process for producing a film structure comprising the steps of: (i) providing at least one functionalized film layer, wherein the at least one functionalized film layer is a polar-reactive group polyolefin layer used as an internal layer in the film structure; wherein the polar-reactive group polyolefin layer consists of a physical blend of an ethylene vinyl acetate polar copolymer and a grafted ethylene polar copolymer; wherein the polar-reactive group has a functional group that comprises 0.15 wt. % to 1.5 wt. % based on the total weight of the polyolefin layer; (ii) providing a lamination adhesive composition having a sufficient chemical resistance value, wherein the chemical resistance value of the lamination adhesive composition is a bond strength sufficient for the laminate to withstand a measured adhesion force of at least 200 g-f/in when the laminate is subjected to a delamination test accompanied by a failure mode of tearing or no failure mode; and (iii) applying the lamination adhesive composition to a least a portion of a surface of the internal layer to form a combination film structure of the internal layer and the lamination adhesive composition.
- Claim:
7. The process of claim 6 , wherein the polar-reactive group polyolefin layer consists of a physical blend of 35% of the ethylene vinyl acetate polar copolymer, based on the total weight of the polyolefin layer, and 65% of the grafted ethylene polar copolymer, based on the total weight of the polyolefin layer.
- Patent References Cited:
4873307 October 1989 Federici et al.
4889915 December 1989 Brauer et al.
5843057 December 1998 McCormack
6358357 March 2002 Lamber et al.
10272650 April 2019 Gargalaka et al.
20150183193 July 2015 Chen et al.
20190001636 January 2019 Kupsch et al.
WO2014036106 March 2014
WO2017119469 July 2017
2018013222 January 2018
- Other References:
PCT/US2019/058094, International Search Report and Written Opinion dated Jan. 31, 2020. cited by applicant
PCT/US2019/058094, International Preliminary Report on Patentability dated Jun. 17, 2021. cited by applicant
- Primary Examiner:
Miggins, Michael C
- Accession Number:
edspgr.11851539
Processing Request
No Comments.