Discontinuously laminated film
Uložené v:
| Názov: | Discontinuously laminated film |
|---|---|
| Patent Number: | 8,603,609 |
| Dátum vydania: | December 10, 2013 |
| Appl. No: | 12/947025 |
| Application Filed: | November 16, 2010 |
| Abstrakt: | Polymer films may be discontinuously laminated by processes such as adhesive bonding, ultrasonic bonding, embossing, ring rolling, and strainable network formation. The films may be prestretched under cold process conditions before lamination. The laminates have superior properties such as tear strength. The laminates may be incorporated into bags, such as trash bags. |
| Inventors: | Fraser, Robert W. (Lombard, IL, US); Borchardt, Michael G. (Naperville, IL, US); MacPherson, Jack A. (Aurora, IL, US); Dorsey, Robert T. (Western Springs, IL, US); Binger, Scott (Bridgeview, IL, US); Broering, Shaun T. (Fort Thomas, KY, US) |
| Assignees: | The Glad Products Company (Oakland, CA, US) |
| Claim: | 1. A laminate thermoplastic film comprising: a first continuous thermoplastic layer of film comprising a first plurality of alternating stretched and un-stretched increments extending perpendicular to a machine direction of the first continuous thermoplastic layer of film; a second continuous thermoplastic layer of film; and a plurality of partially discontinuous bonds laminating the first continuous thermoplastic layer of film directly to the second continuous thermoplastic layer of film, the partially discontinuous bonds extending parallel to a machine direction of the second continuous thermoplastic layer of film and the machine direction of the first continuous thermoplastic layer of film; wherein the machine direction of the first continuous thermoplastic layer of film is parallel to the machine direction of the second continuous thermoplastic layer of film. |
| Claim: | 2. The laminate film of claim 1 , wherein at least one of the first continuous thermoplastic layer of film and the second continuous thermoplastic layer of film is a multi-ply film layer. |
| Claim: | 3. The laminate film of claim 1 , wherein the MD tear of the laminate is greater than the MD tear of any of the individual layers. |
| Claim: | 4. The laminate film of claim 1 , wherein the Dynatup peak load of the laminate is greater than the Dynatup peak load of any of the individual layers. |
| Claim: | 5. The laminate film of claim 1 , wherein partially discontinuous bonds securing the first continuous thermoplastic layer of film to the second continuous thermoplastic layer of film are evenly spaced. |
| Claim: | 6. The laminate film of claim 1 , wherein the second continuous thermoplastic layer of film comprises a second plurality of alternating stretched and un-stretched increments extending perpendicular to the machine direction of the second continuous thermoplastic layer of film. |
| Claim: | 7. The laminate film of claim 1 , wherein the partially discontinuous bonds securing the first continuous thermoplastic layer of film to the second continuous thermoplastic layer of film are pressure bonds. |
| Claim: | 8. The laminate film of claim 1 , wherein the the first continuous thermoplastic layer of film comprises a third plurality of alternating stretched and un-stretched increments extending parallel to the machine direction of the first continuous thermoplastic layer of film. |
| Claim: | 9. The laminate film of claim 1 , wherein the partially discontinuous bonds securing the first continuous thermoplastic layer of film to the second continuous thermoplastic layer of film are adhesive bonds. |
| Claim: | 10. The laminate film of claim 1 , wherein the partially discontinuous bonds securing the first continuous thermoplastic layer of film to the second continuous thermoplastic layer of film are ultrasonic bonds. |
| Claim: | 11. The laminate film of claim 1 , wherein the the first continuous thermoplastic layer of film comprises a third plurality of alternating stretched and un-stretched increments extending parallel to the machine direction of the first continuous thermoplastic layer of film. |
| Claim: | 12. A laminate thermoplastic film comprising: a first continuous layer of thermoplastic film comprising one of: a plurality of alternating stretched and un-stretched increments extending perpendicular to a machine direction of the first continuous thermoplastic layer of film, a plurality of alternating stretched and un-stretched increments extending parallel to the machine direction of the first continuous thermoplastic layer of film, or a plurality of rib like elements in a discontinuous strainable network; a second continuous layer of thermoplastic film comprising another of: the plurality of alternating stretched and un-stretched increments extending perpendicular to a machine direction of the first continuous thermoplastic layer of film, the plurality of alternating stretched and un-stretched increments extending parallel to the machine direction of the first continuous thermoplastic layer of film, or the plurality of rib like elements in the discontinuous strainable network; and a plurality of discontinuous or partially discontinuous bonds laminating the first continuous layer of thermoplastic film directly to the second continuous layer of thermoplastic film wherein the machine direction of the first continuous layer of thermoplastic film is parallel to a machine direction of the second continuous layer of thermoplastic film. |
| Claim: | 13. The laminate film of claim 12 , wherein: the first continuous layer of thermoplastic film comprises the plurality of alternating stretched and un-stretched increments extending perpendicular to the machine direction of the first continuous thermoplastic layer of film; and the second continuous layer of thermoplastic film comprises the plurality of alternating stretched and un-stretched increments extending parallel to the machine direction of the first continuous thermoplastic layer of film. |
| Claim: | 14. The laminate film of claim 13 , wherein: the plurality of bonds comprise partially discontinuous bonds; and the plurality of partially discontinuous bonds are aligned with the plurality of alternating stretched and un-stretched increments extending parallel to the machine direction of the first continuous thermoplastic layer of film. |
| Claim: | 15. The laminate film of claim 12 , wherein the second continuous layer of thermoplastic film comprises the plurality of rib like elements in the discontinuous strainable network. |
| Claim: | 16. The laminate film of claim 12 , wherein: the plurality of bonds comprise discontinuous bonds; and the plurality of discontinuous bonds are aligned with the discontinuous strainable network. |
| Claim: | 17. A laminate thermoplastic film consisting essentially of: a first continuous layer of thermoplastic film including: a first plurality of alternating stretched and un-stretched increments extending perpendicular to a machine direction of the first continuous thermoplastic layer of film; a second plurality of alternating stretched and un-stretched increments extending parallel to the machine direction of the first continuous thermoplastic layer of film; a second continuous layer of thermoplastic film including: a third plurality of alternating stretched and un-stretched increments extending perpendicular to the machine direction of the first continuous thermoplastic layer of film; a fourth plurality of alternating stretched and un-stretched increments extending parallel to the machine direction of the first continuous thermoplastic layer of film; and a plurality of partially discontinuous bonds laminating the first continuous layer of thermoplastic film to directly the second continuous layer of thermoplastic film; wherein the plurality of partially discontinuous bonds, the fourth plurality of alternating stretched and un-stretched increments extending parallel to the machine direction of the first continuous thermoplastic layer of film, and second plurality of alternating stretched and un-stretched increments extending parallel to the machine direction of the first continuous thermoplastic layer of film are all aligned. |
| Claim: | 18. The laminate film of claim 17 , wherein a machine direction of the first continuous thermoplastic layer of film is parallel to a machine direction of the second continuous thermoplastic layer of film. |
| Claim: | 19. The laminate film of claim 17 , wherein the plurality of partially discontinuous bonds are adhesive bonds. |
| Claim: | 20. The laminate film of claim 17 , wherein the the laminate film forms the sidewalls of a bag. |
| Current U.S. Class: | 428/172 |
| Patent References Cited: | 2714571 August 1955 Irion et al. 3058868 October 1962 Schroeder 3322613 May 1967 Rasmussen 3622422 November 1971 Newman et al. 3857144 December 1974 Bustin 4116892 September 1978 Schwarz 4153664 May 1979 Sabee 4153751 May 1979 Schwarz 4289832 September 1981 Schwarz 4302495 November 1981 Marra 4343848 August 1982 Leonard, Jr. 4379197 April 1983 Cipriani 4438167 March 1984 Schwarz 4517714 May 1985 Sneed et al. 4522203 June 1985 Mays 4614679 September 1986 Farrington, Jr. et al. 4692368 September 1987 Taylor et al. 4704238 November 1987 Okuyama et al. 4753840 June 1988 Van Gompel 4793885 December 1988 Rasmussen 4930905 June 1990 Sharps, Jr. 5035941 July 1991 Blackburn 5100721 March 1992 Akao 5167897 December 1992 Weber et al. 5296184 March 1994 Wu et al. 5382461 January 1995 Wu 5422172 June 1995 Wu 5518801 May 1996 Chappell et al. 5851937 December 1998 Wu et al. 5861074 January 1999 Wu 5865926 February 1999 Wu et al. 6013151 January 2000 Wu et al. 6214147 April 2001 Mortellite et al. 6254736 July 2001 Earl et al. 6265045 July 2001 Mushaben 6361784 March 2002 Brennan et al. 6385818 May 2002 Savicki, Sr. 7306729 December 2007 Bacino et al. 2002/0074691 June 2002 Mortellite et al. 2003/0024625 February 2003 McAmish et al. 2005/0123726 June 2005 Broering et al. 2006/0083900 April 2006 Ashraf 2006/0093766 May 2006 Savicki et al. 2007/0166503 July 2007 Hannigan 2007/0254120 November 2007 Rasmussen 2007/0257402 November 2007 Rasmussen 2008/0124461 May 2008 Leener et al. 2009/0029114 January 2009 Cancio et al. 2009/0068427 March 2009 Patel et al. 2009/0264847 October 2009 Ashton et al. WO9913702 November 1990 WO9956953 November 1999 |
| Other References: | International Search Report, mailed Jan. 21, 2011, from counterpart PCT/US10/56799, filing date Nov. 16, 2010. cited by applicant |
| Primary Examiner: | Loney, Donald J |
| Attorney, Agent or Firm: | Feix, Thomas C. |
| Prístupové číslo: | edspgr.08603609 |
| Databáza: | USPTO Patent Grants |
| Abstrakt: | Polymer films may be discontinuously laminated by processes such as adhesive bonding, ultrasonic bonding, embossing, ring rolling, and strainable network formation. The films may be prestretched under cold process conditions before lamination. The laminates have superior properties such as tear strength. The laminates may be incorporated into bags, such as trash bags. |
|---|