Claims
- 1. An assembly of a roll of pressure sensitive adhesive tape mounted on a dispenser, the assembly comprising:
a) a roll of pressure sensitive adhesive tape, said tape comprising a backing and a layer of pressure sensitive adhesive on said backing; i) wherein said backing has an energy to sever of up to 700 N-cm/cm2 when severed according to The Dispense Test—Plastic Blade; ii) wherein said backing has an elongation of up to 4% when severed according to The Dispense Test—Plastic Blade; iii) wherein said backing has an elongation to break of from 40% to 170%; and iv) wherein said backing comprises a biaxially oriented substrate, wherein said biaxially oriented substrate comprises an isotactic polypropylene composition having an isotacticity of at least 90%, and wherein said biaxially oriented substrate has a melt flow rate of at least 8 grams/10 minutes; and b) a dispenser, said dispenser including a roll mount having said roll of tape rotatably mounted thereon, and a plastic serrated cutting blade for severing said adhesive tape.
- 2. The assembly of claim 1, wherein said biaxially oriented substrate comprises a monolayer substrate.
- 3. An adhesive tape comprising:
a backing and a layer of adhesive on said backing; wherein said backing has an energy to sever of up to 350 N-cm/cm2 when severed according to The Dispense Test—Metal Blade and has a tensile elongation to break from above about 55% to about 170%; and wherein said backing comprises a biaxially oriented substrate, wherein said biaxially oriented substrate comprises an isotactic polypropylene composition, and wherein said biaxially oriented substrate has a melt flow rate of at least 8 grams/10 minutes.
- 4. The adhesive tape of claim 3, wherein said biaxially oriented substrate comprises a monolayer substrate.
- 5. The adhesive tape of claim 3, wherein said biaxially oriented substrate comprises a multilayer film, and wherein with respect to the total thickness of said biaxially oriented substrate, at least 50% of the thickness of said biaxially oriented substrate comprises at least 90% isotactic polypropylene.
- 6. The adhesive tape of claim 5, wherein a first plurality of said layers each comprise at least 90% isotactic polypropylene, and wherein said first plurality of layers comprise at least 50% of the total thickness of said biaxially oriented substrate.
- 7. The adhesive tape of claim 3, wherein said biaxially oriented substrate has a weight average molecular weight of at least 100,000 grams/mole.
- 8. The adhesive tape of claim 3, wherein said backing has an elongation of up to 4% when severed according to The Dispense Test—Metal Blade.
- 9. The adhesive tape of claim 3, wherein said biaxially oriented substrate has a melt flow rate of at least 12 grams/10 minutes.
- 10. The adhesive tape of claim 9, wherein said biaxially oriented substrate has a melt flow rate of at least 20 grams/10 minutes.
- 11. The adhesive tape of claim 3, wherein said biaxially oriented substrate has a melt flow rate of from 8 to 100 grams/10 minutes.
- 12. The adhesive tape of claim 3, wherein said polypropylene composition has an isotacticity greater than about 90%.
- 13. The adhesive tape of claim 3, wherein said polypropylene composition has a melt flow rate of at least 8 grams/10 minutes.
- 14. The adhesive tape of claim 13, wherein said polypropylene composition has melt flow rate of at least 12 grams/10 minutes.
- 15. The adhesive tape of claim 14, wherein said polypropylene composition has a melt flow rate of at least 20 grams/10 minutes.
- 16. The adhesive tape of claim 13, wherein said polypropylene composition has a melt flow rate of from 8 to 100 grams/10 minutes.
- 17. The adhesive tape of claim 3, wherein said polypropylene composition comprises a blend of a first isotactic polypropylene having a first melt flow rate and a second isotactic polypropylene having a second melt flow rate greater than said first melt flow rate.
- 18. The adhesive tape of claim 17, wherein said first melt flow rate is about 0.5-8.0 grams/10 minutes and wherein said second melt flow rate is at least 8.0 grams/10 minutes.
- 19. The adhesive tape of claim 18, wherein said second melt flow rate is at least 50 grams/10 minutes.
- 20. The adhesive tape of claim 18, wherein said second melt flow rate is up to about 150 grams/10 minutes.
- 21. The adhesive tape of claim 19, wherein said first melt flow rate is about 0.5 to 5 grams/10 minutes.
- 22. The adhesive tape of claim 17, wherein said first polypropylene has a weight average molecular weight of at least 350,000 and said second polypropylene has a weight average molecular weight of at least 100,000.
- 23. The adhesive tape of claim 3, wherein said biaxially oriented substrate has been oriented to a final area stretch ratio of at least 36:1.
- 24. The adhesive tape of claim 23, wherein said biaxially oriented substrate has been simultaneously biaxially oriented.
- 25. The adhesive tape of claim 23, wherein said biaxially oriented substrate has been sequentially biaxially oriented.
- 26. The adhesive tape of claim 3, wherein said adhesive comprises a pressure sensitive adhesive.
- 27. The adhesive tape of claim 26, wherein said adhesive tape is spirally wound so as to provide a roll of tape.
- 28. The adhesive tape of claim 27, wherein said roll is mounted on a dispenser including a metal cutting blade.
- 29. The adhesive tape of claim 27, wherein said roll is mounted on a dispenser including a plastic cutting blade.
- 30. A backing comprising a biaxially oriented substrate, wherein said biaxially oriented substrate comprises an isotactic polypropylene composition, wherein said biaxially oriented substrate has a melt flow rate of at least 8 grams/10 minutes and a tensile elongation to bread from above about 55% to about 170%.
- 31. The backing of claim 30, wherein said biaxially oriented substrate comprises a monolayer substrate.
- 32. The backing of claim 30, wherein said biaxially oriented substrate comprises a multilayer film, and wherein with respect to the total thickness of said biaxially oriented substrate, at least 50% of the thickness of said biaxially oriented substrate comprises at least 90% isotactic polypropylene.
- 33. The backing of claim 32, wherein a first plurality of said layers each comprise at least 90% isotactic polypropylene, and wherein said first plurality of layers comprise at least 50% of the total thickness of said biaxially oriented substrate.
- 34. The backing of claim 30, wherein said biaxially oriented substrate has a weight average molecular weight of at least 100,000 grams/mole.
- 35. The backing of claim 30, wherein said backing has an elongation of up to 4% when severed according to The Dispense Test—Plastic Blade.
- 36. The backing of claim 30, wherein said biaxially oriented substrate has a melt flow rate of at least 12 grams/10 minutes.
- 37. The backing of claim 36, wherein said biaxially oriented substrate has a melt flow rate of at least 20 grams/10 minutes.
- 38. The backing of claim 30, wherein said biaxially oriented substrate has a melt flow rate of from 8 to 100 grams/10 minutes.
- 39. The backing of claim 30, wherein said polypropylene composition has a weight average molecular weight of at least 100,000 grams per mole.
- 40. The backing of claim 30, wherein said polypropylene composition has an isotacticity greater than about 90%.
- 41. The backing of claim 30, wherein said polypropylene composition has a melt flow rate of at least 8 grams/10 minutes.
- 42. The backing of claim 41, wherein said polypropylene composition has melt flow rate of at least 12 grams/10 minutes.
- 43. The backing of claim 42, wherein said polypropylene composition has a melt flow rate of at least 20 grams/10 minutes.
- 44. The backing of claim 41, wherein said polypropylene composition has a melt flow rate of from 8 to 100 grams/10 minutes.
- 45. The backing of claim 30, wherein said polypropylene composition comprises a blend of a first isotactic polypropylene having a first melt flow rate and a second isotactic polypropylene having a second melt flow rate greater than said first melt flow rate.
- 46. The backing of claim 45, wherein said first melt flow rate is about 0.5-8.0 grams/10 minutes and wherein said second melt flow rate is at least 8.0 grams/10 minutes.
- 47. The backing of claim 46, wherein said second melt flow rate is at least 50 grams/10 minutes.
- 48. The backing of claim 46, wherein said second melt flow rate is up to about 150 grams/10 minutes.
- 49. The backing of claim 48, wherein said first melt flow rate is about 0.5 to 5 grams/10 minutes.
- 50. The backing of claim 45, wherein said first polypropylene has a weight average molecular weight of at least 350,000 and said second polypropylene has a weight average molecular weight of at least 100,000.
- 51. The backing of claim 30, wherein said biaxially oriented substrate has been oriented to a final area stretch ratio of at least 36:1.
- 52. The backing of claim 51, wherein said biaxially oriented substrate has been simultaneously biaxially oriented.
- 53. The backing of claim 51, wherein said biaxially oriented substrate has been sequentially biaxially oriented.
- 54. The backing of claim 30, further comprising a layer of adhesive on said backing.
- 55. The backing of claims 54, wherein said adhesive comprises a pressure sensitive adhesive.
- 56. The backing of claim 55, wherein said adhesive tape is spirally wound so as to provide a roll of tape.
- 57. The backing of claim 56, wherein said roll is mounted on a dispenser including a metal cutting blade.
- 58. The backing of claim 56, wherein said roll is mounted on a dispenser including a plastic cutting blade.
- 59. The backing of claim 30 wherein said backing has an energy to sever of up to 700 N-cm/cm2 when severed according to The Dispense Test—Plastic Blade.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This is a continuation of application Ser. No. 09/331,045, filed Jun. 16, 1999; which was a national stage filing under 35 U.S.C. 371 of PCT/US98/24105 filed Nov. 12, 1998, which International Application was published by the International Bureau in English on May 25, 2000.
Continuations (1)
|
Number |
Date |
Country |
Parent |
09331045 |
Jun 1999 |
US |
Child |
10762053 |
Jan 2004 |
US |