Self-adhesively treated backing material

• US 6,524,699 B1
• Filed: 10/30/1998
• Issued: 02/25/2003
• Est. Priority Date: 12/12/1997
• Status: Expired due to Fees

• Current Assignee: Beiersdorf AG (maxingvest GmbH & Co. KGaA)
• Original Assignee: Beiersdorf AG (maxingvest GmbH & Co. KGaA)
• Inventors: Himmelsbach, Peter, Jauchen, Peter
• Primary Examiner(s): Cole, Elizabeth M.
• Assistant Examiner(s): SINGH-PANDEY, ARTI R
• Application Number:
  US09/183,114
• Time in Patent Office: 1,579 Days
• Field of Search: 428/343, 428/349, 428/355.BL, 428/911, 428/912, 428/914, 428/915, 428/916
• US Class Current: 428/343
• CPC Class Codes: A61L 15/58 Adhesives
• CPC Class Codes: C08L 53/02 of vinyl-aromatic monomers and conjugated dienes
• CPC Class Codes: C09J 2301/122 the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
• CPC Class Codes: C09J 2301/304 the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
• CPC Class Codes: C09J 2301/308 the adhesive tape or sheet losing adhesive strength when being stretched, e.g. stretch adhesive
• CPC Class Codes: C09J 7/21 Paper; Textile fabrics
• CPC Class Codes: C09J 7/35 Heat-activated
• CPC Class Codes: Y10S 428/911 Penetration resistant layer
• CPC Class Codes: Y10S 428/912 Puncture healing layer
• CPC Class Codes: Y10S 428/914 Transfer or decalcomania
• CPC Class Codes: Y10S 428/915 Fraud or tamper detecting
• CPC Class Codes: Y10S 428/916 Fraud or tamper detecting
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/2826 Synthetic resin or polymer
• CPC Class Codes: Y10T 428/2891 including addition polymer from alpha-beta unsaturated carboxylic acid [e.g., acrylic acid, methacrylic acid, etc.] Or derivative thereof

Abstract

At least one-sidedly self-adhesively treated backing material which is coated partially with a self-adhesive composition and which under a tensile load of 10 N/cm has an extension of greater than 10% so that the backing material following application can be detached from the substrate by pulling in the direction of the bond plane.

Claims

1. An adhesive article comprising a backing material coated on at least one surface thereof with a pressure sensitive adhesive composition, said pressure sensitive adhesive composition being coated on said at least one surface in a plurality of discrete and discontinuous areas of pressure sensitive adhesive composition such that the pressure sensitive adhesive composition only partially coats said surface, and wherein the adhesive article under a tensile load of 10 N/cm has an extension of greater than 10% and, when bonded to a substrate, can be removed from the substrate by pulling on the adhesive article in the direction of the plane of the bond formed by the bonding of said adhesive article in the direction of the plane of the bond formed by the bonding of said adhesive article to said substrate.

2. The adhesive article according to claim 1, which under a tensile load of 10 N/cm has an extension of greater than 15% up to 3000%.

3. The adhesive article according to claim 1, wherein the self-adhesive composition is a hotmelt adhesive composition having a dynamic-complex glass transition temperature with a frequency of 0.1 rad/s of less than 5°

C.

4. The adhesive article according to claim 1, wherein the hotmelt adhesive composition is built up on the basis of block copolymers.

5. The adhesive article according to claim 4, wherein the block copolymers are A-B or A-B-A block copolymers or mixtures thereof, with phase A being principally polystyrene or its derivatives and phase B being ethylene, propylene, butylene, butadiene, isoprene or mixtures thereof.

6. The adhesive article according to claim 1, wherein the hotmelt adhesive composition consists of

from 10 to 90% by weight of block copolymers,

from 5 to 80% by weight of tackifiers,

if desired, less than 60% by weight of plasticizers,

less than 15% by weight of additives,

less than 5% by weight of stabilizers.

7. The adhesive article according to claim 6, wherein the tackifiers are selected from the group consisting of oils, waxes, resins and mixtures thereof.

8. The adhesive article according to claim 7, wherein the tackifiers are selected from the group consisting of mixtures of resins and oils.

9. The adhesive article according to claim 1, wherein the hotmelt adhesive composition is applied by halftone printing, thermal screening printing or intaglio printing.

10. The adhesive article according to claim 1, wherein the hotmelt adhesive composition is applied in the form of polygeometric domes to the backing material.

11. The adhesive article according to claim 1, wherein the hotmelt adhesive composition has been coated onto the backing material in a weight per unit area of more than 15 g/m².

12. The adhesive article according to claim 1, wherein the coated backing material has an air permeability of greater than 1 cm³/cm²*s).

13. The adhesive article according to claim 1, wherein the backing material has bond strength to the reverse of the backing of at least 0.5 N/cm.

14. The adhesive article according to claim 1, wherein the hotmelt adhesive composition has a gas content of more than 5% by volume.

15. Orthopaedic or phlebological bandages and dressings comprising the adhesive article of claim 1.

16. The orthopaedic or phlebological bandages and dressings of claim 15, wherein the partially coated backing material is lined after application or provided with a wound pad or padding.

17. The orthopaedic or phlebological bandages and dressings of claim 15, wherein the partially coated backing material is sterilizable.

18. The orthopaedic or phlebological bandages and dressings of claim 15, wherein the pressure sensitive adhesive composition includes an active substance.