Low trauma adhesive article

• US 6,368,687 B1
• Filed: 12/01/1998
• Issued: 04/09/2002
• Est. Priority Date: 12/01/1997
• Status: Expired due to Term

• Current Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Tucker, Joseph, Battles, Donald, Young, James K., Ferber, Richard, Joseph, Eugene G.
• Primary Examiner(s): Pyon, Harold
• Assistant Examiner(s): HON, SOW FUN
• Application Number:
  US09/201,954
• Time in Patent Office: 1,225 Days
• Field of Search: 428/316.6, 428/317.5, 428/40.1, 428/41.3, 428/317.3, 602/54, 602/58, 442/346, 442/350, 442/351, 442/381, 442/394
• US Class Current: 428/40.1
• CPC Class Codes: A61L 15/585 Mixtures of macromolecular compounds
• CPC Class Codes: Y10T 428/14 Layer or component removable to expose adhesive
• CPC Class Codes: Y10T 428/249981 Plural void-containing components
• CPC Class Codes: Y10T 428/249983 As outermost component
• CPC Class Codes: Y10T 428/249984 Adhesive or bonding component contains voids
• CPC Class Codes: Y10T 428/2813 Heat or solvent activated or sealable
• CPC Class Codes: Y10T 428/283 Water activated
• CPC Class Codes: Y10T 428/2835 including moisture or waterproof component
• CPC Class Codes: Y10T 428/2944 Free metal in coating
• CPC Class Codes: Y10T 428/2967 Synthetic resin or polymer
• CPC Class Codes: Y10T 442/621 Including other strand or fiber material in a different layer not specified as having microdimensions
• CPC Class Codes: Y10T 442/625 Autogenously bonded
• CPC Class Codes: Y10T 442/626 Microfiber is synthetic polymer
• CPC Class Codes: Y10T 442/659 Including an additional nonwoven fabric
• CPC Class Codes: Y10T 442/674 Nonwoven fabric with a preformed polymeric film or sheet

Abstract

A low trauma pressure-sensitive adhesive coated substrate comprising a sheet material, tape or laminate structure designed to adhere to skin or like surfaces. The pressure-sensitive adhesive layer of this adhesive coated substrate is a fibrous adhesive layer generally having a basis weight of from 5 to 200 g/m² applied to a conformable backing or substrate. The fibrous adhesive layer has a textured outer face and persistent porosity between discrete adhesive fibers. Generally, the fibrous adhesive layer has a MVTR (measured by ASTM E 96-80 at 40° C.) of at least 1000 g/m²/day, preferably at least 6000 g/m²/day.

Claims

1. A low trauma adhesive coated substrate comprising a backing substrate formed of an absorbent material having a water absorbency of at least 100% and a fibrous adhesive layer said fibrous adhesive layer comprising an entangled web of discrete pressure-sensitive adhesive fibers, with a basis weight of 5 to 200 g/m² of which pressure-sensitive adhesive fibers are adhesive along their entire length, of which entangled web of discrete pressure-sensitive adhesive fibers is persistently porous and has a MVTR of at least 1000 g/m²/day, said adhesive coated substrate having an initial adhesion to dry skin of at least 20 g/2.5 cm (0.08 N/cm), an initial wet skin adhesion of at least 20 g/2.5 cm (0.08 N/cm), and provides a TEWL after 10 tape pulls per day for two consecutive days of less than 20 grams/m²/hour at 0.5 hours after the last pull, with an original TEWL of from about 3 to 7 grams/m²/hour.

2. The low trauma adhesive coated substrate of claim 1 wherein the backing substrate is breathable and the adhesive web has an MVTR of at least 6000 g/m²/day.

3. The low trauma adhesive coated substrate of claim 2 wherein the backing substrate is a nonwoven web.

4. The low trauma adhesive coated substrate of claim 2 wherein the backing substrate has a basis weight of from 15 to 200 g/m².

5. The low trauma adhesive coated substrate of claim 2 wherein the backing substrate has a basis weight of from 20 to 150 g/m².

6. The low trauma adhesive coated substrate of claim 3 wherein the backing substrate has a basis weight of from 25 to 100 g/m².

7. The low trauma adhesive coated substrate of claim 1 wherein the cumulative keratin removed from an average subject by the low trauma coated substrate is less than the cumulative keratin removed after 20 pulls by a similar substrate coated with a comparable continuous hot-melt adhesive coated substrate.

8. The low trauma adhesive coated substrate of claim 7 wherein the cumulative keratin removed from an average subject is at least 20 percent less with the low trauma adhesive coated substrate than with the comparable continuous hot-melt adhesive coated substrate.

9. The low trauma adhesive coated substrate of claim 1 wherein the backing substrate has a hand of less than 100 grams.

10. The low trauma adhesive coated substrate of claim 2 wherein the basis weight of the adhesive layer is from 20 to 100 g/m².

11. The low trauma adhesive coated substrate of claim 1 wherein the backing substrate has no liquid absorbent layers over that portion of the laminate provided with adhesive.

12. The low trauma adhesive coated substrate of claim 1 wherein the adhesive coated substrate has an initial adhesion to dry skin of from 20 g/2.5 cm (0.08 N/cm) to 100 g/2.5 cm (0.39 N/cm).

13. The low trauma adhesive coated substrate of claim 1 wherein the adhesive coated substrate has an initial adhesion to dry skin of from 30 g/2.5 cm (0.12 N/cm) to 70 g/2.5 cm (0.27 N/cm).

14. The low trauma adhesive coated substrate of claim 1 wherein the adhesive layer comprises commingled pressure-sensitive adhesive fibers and non-pressure-sensitive adhesive fibers.

15. The low trauma adhesive coated substrate of claim 1 wherein the pressure-sensitive adhesive fibers comprise a blend of a pressure-sensitive adhesive phase and a thermoplastic phase.

16. The low trauma adhesive coated substrate of claim 1 wherein the pressure-sensitive adhesive fibers have two or more layers along the length of the fibers at least one layer being a pressure-sensitive adhesive layer forming at least a portion of the outer surface of the fiber and at least one second layer of a thermoplastic material.

17. The low trauma adhesive coated substrate of claim 16 wherein the layers are side by side.

18. The low trauma adhesive coated substrate of claim 16 wherein the layers are concentric.

19. The low trauma adhesive coated substrate of claim 16 wherein the layers are coextensive and continuous along the length of the fiber.

20. The low trauma adhesive coated substrate of claim 19 wherein there are at least three alternating layers.

21. The low trauma adhesive coated substrate of claim 1 wherein the fibrous adhesive web is formed of melt blown pressure-sensitive adhesive fibers.

22. The low trauma adhesive coated substrate of claim 1 wherein the fibrous adhesive web is formed of spunbond pressure-sensitive adhesive fibers.

23. The low trauma adhesive coated substrate of claim 1 wherein the pressure-sensitive adhesive fibers have an average diameter of less than about 100 microns.

24. The low trauma adhesive coated substrate of claim 1 wherein the pressure-sensitive adhesive fibers are formed from a tackified rubber-resin adhesive.

25. The low trauma adhesive coated substrate of claim 24 wherein the tackified rubber-resin adhesive comprises an A-B type block copolymer and a compatible resin.

26. The low trauma adhesive coated substrate of claim 1 wherein the pressure-sensitive adhesive fiber comprises a polyalphaolefin adhesive.

27. The low trauma adhesive coated substrate of claim 1 wherein the pressure-sensitive adhesive fibers comprises an acrylate pressure-sensitive adhesive.

33. The low trauma adhesive coated substrate of claim 1 which has an initial dry skin adhesion of at least 40 g/2.5 cm (0.16 N/cm) and an initial wet skin adhesion of at least 40 g/2.5 cm (0.16 N/cm).

34. The low trauma adhesive coated substrate of claim 1 which has an initial wet skin adhesion that is at least about 65% of the initial dry skin adhesion.

35. The low trauma adhesive coated substrate of claim 34 which has an initial wet skin adhesion that is at least about 75% of the initial dry skin adhesion.

36. The low trauma adhesive coated substrate of claim 35 which has an initial wet skin adhesion that is at least about 100% of the initial dry skin adhesion.

37. The low trauma adhesive coated substrate of claim 1 wherein the absorbent backing substrate has a water retention of at least about 25%.

38. The low trauma adhesive coated substrate of claim 1 wherein the absorbent backing substrate comprises a nonwoven web.

39. The low trauma adhesive coated substrate of claim 38 wherein the absorbent backing substrate comprises a spunlaced nonwoven web.

42. The method of claim 1 wherein the absorbent backing substrate comprises a spunlaced nonwoven web.

44. The low trauma adhesive coated substrate of claim 1 wherein the absorbent material has a water absorbency of at least 200%.

45. The low trauma adhesive coated substrate of claim 1 wherein the absorbent material has a water absorbency of at least 500%.

28. A method of using an adhesive coated substrate comprising:

a) providing a backing substrate of an absorbent material having a water absorbency of at least 100%, said backing being provided with a fibrous adhesive layer said fibrous adhesive layer comprising an entangled web of discrete pressure-sensitive adhesive fibers with a basis weight of 5 to 200 g/m² of which pressure-sensitive adhesive fibers are adhesive along their entire length, of which entangled web of discrete pressure-sensitive adhesive fibers is persistently porous and has a MVTR of at least 1000 g/m²/day said adhesive coated substrate having an initial adhesion to dry skin of at least 20 g/2.5 cm (0.08 N/cm) and an initial wet skin adhesion of at least 20 g/2.5 cm (0.8 N/cm); and

b) adhering the adhesive coated substrate to skin and subsequently removing the substrate such that the adhesive coated substrate provides a TEWL after 10 tape pulls per day for two consecutive days of less than 20 g/m²/hour at 0.5 hours after the last pull with an original TEWL of about 3 to 7 g/m²/hour.

29. The method of claim 28 wherein the cumulative keratin removed from an average subject is at least 20 percent less from the fibrous adhesive coated substrate than the cumulative keratin removed from an average subject by the low trauma coated substrate is less than the cumulative keratin removed after 20 pulls by a similar substrate coated with a comparable continuous hot-melt adhesive coated substrate.

30. The method of claim 29 wherein the cumulative keratin removed from the average subject is at least 50 percent less from the fibrous adhesive coated substrate than with the comparable continuous hot-melt adhesive coated substrate.

31. The method of claim 28 wherein the adhesive coated substrate has an initial adhesion to dry skin of from 20 to 100 g/2.5 cm (0.08 to 0.39 N/cm).

32. The method of claim 28 wherein the adhesive coated substrate has an initial adhesion to dry skin of from 30 to 70 g/2.5 cm (0.12 to 0.27 N/cm).

40. The method of claim 28 wherein the adhesive coated substrate has an initial dry skin adhesion of at least 40 g/2.5 cm (0.16 N/cm) and an initial wet skin adhesion of at least 40 g/2.5 cm (0.16 N/cm).

41. The method of claim 28 wherein the adhesive coated substrate has an initial wet skin adhesion that is at least about 65% of the initial dry skin adhesion.

43. An adhesive coated substrate comprising a backing substrate and a fibrous adhesive layer said fibrous adhesive layer comprising an entangled web of discrete pressure-sensitive adhesive fibers, with a basis weight of 5 to 200 g/m² which pressure-sensitive adhesive fibers are adhesive along their entire length which webs of pressure-sensitive adhesive fibers are persistently porous, said backing substrate comprising an absorbent material having an absorbency of at least 100%, wherein the adhesive coated substrate has an initial dry skin adhesion of at least 20 g/2.5 cm (0.08 N/cm), an initial wet skin adhesion of at least 20 g/2.5 cm (0.08 N/cm), and an initial wet skin adhesion that is at least about 65% of the initial dry skin adhesion and provides a TWEL after 10 tape pull per day for two consecutive days of less then 20 grams/m²/hour at 0.5 hours after the last pull, with an original TEWL of from about 3 to 7 grams/m²/hours.