PSA tape for medical diagnostic strips

• US 20050208298A1
• Filed: 11/29/2004
• Published: 09/22/2005
• Est. Priority Date: 03/18/2004
• Status: Abandoned Application

• Current Assignee: Tesa AG (Maxingvest AG)
• Original Assignee: Tesa AG (Maxingvest AG)
• Inventors: Bunde, Bernd, Neubert, Ingo
• Application Number:
  US10/998,888
• Publication Number:
  US 20050208298A1
• Time in Patent Office: Days
• US Class Current: 428/354
• CPC Class Codes: A61F 13/0269 Tapes for dressing attachment for stoma bags A61F5/443; for nappies or sanitary towels A61F13/58; wound closure tapes A61B17/085; for surgical drapes A61B46/00; attaching catheters A61M25/02
• CPC Class Codes: C09J 133/04 Homopolymers or copolymers of esters C09J143/04 takes precedence
• CPC Class Codes: C09J 2301/312 parameters being the characterizing feature
• CPC Class Codes: C09J 2467/006 in the substrate
• CPC Class Codes: C09J 7/385 Acrylic polymers
• CPC Class Codes: Y10T 428/24 Structurally defined web or sheet [e.g., overall dimension, etc.]
• CPC Class Codes: Y10T 428/26 Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
• CPC Class Codes: Y10T 428/27 Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
• CPC Class Codes: Y10T 428/2848 Three or more layers
• 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

Pressure-sensitive adhesive tape for medical diagnostic strips used to analyze biological fluids, the tape comprising a carrier material coated on one or both sides with not more than 20 g/m², preferably not more than 15 g/m², per side, of a pressure-sensitive adhesive, where the shear strength of the pressure-sensitive adhesive at 25° C. and 70° C. under a weight load of 1000 g is greater than 10 000 min and the polymer or polymers of the pressure sensitive adhesive has or have a K value of greater than 55 Pa*s.

Claims

1. Pressure-sensitive adhesive tape for medical diagnostic strips used to analyze biological fluids, the tape comprising a carrier material coated on one or both sides with not more than 20 g/m² of a pressure-sensitive adhesive, wherein the shear strength of the pressure-sensitive adhesive at 25°

C. and 70°

C. under a weight load of 1000 g is greater than 10,000 min and the polymer or polymers of the pressure-sensitive adhesive has or have a K value of greater than 55 Pa*s.

2. Pressure-sensitive adhesive tape according to claim 1, wherein the pressure-sensitive adhesive is composed of one or more copolymers in which acrylate monomers form the principal constituent.

3. Pressure-sensitive adhesive tape according to claim 1, wherein the polymers of the pressure-sensitive adhesive have a K value of greater than 60 Pa*s.

4. Pressure-sensitive adhesive tape according to claim 1, wherein the microshear travel of the pressure-sensitive adhesive tape after 15 minutes at 40°

C. under a load of 500 g is less than 100 μ

m.

5. Pressure-sensitive adhesive tape according to claim 1, wherein the ratio of the microshear travels, μ

S2/μ

S1, is less than 0.3.

6. Pressure-sensitive adhesive tape according to claim 1, wherein the dynamic glass transition temperature of the pressure-sensitive adhesive at 10 rad/s is −

10°

C. to 15°

C.

7. Pressure-sensitive adhesive tape according to claim 1, wherein the pressure-sensitive adhesive contains no additions at all of tackifier resins or plasticizers.

8. Pressure-sensitive adhesive tape according to claim 1, wherein the total thickness of the pressure-sensitive adhesive tapes without release film is 20 to 150 μ

m.

9. Pressure-sensitive adhesive tape according to claim 1, having a bond strength to steel of at least 1.5 and/or the bond strength to PET of at least 0.5.

11. Pressure-sensitive adhesive tape according to claim 1, wherein said carrier material is composed of PET.

12. Pressure-sensitive adhesive tape according to claim 1, comprising an adhesion promotor between the carrier material and the pressure-sensitive adhesives.

13. Diagnostic strips for analysis of biological fluids, comprising the pressure sensitive adhesive tape of claim 1.

14. The pressure-sensitive adhesive tape of claim 1, wherein said coating on one or both sides of said carrier material is in an amount of not more than 15 g/m².

15. The pressure-sensitive adhesive tape of claim 4, wherein said microshear travel is less than 60 μ

m.

16. The pressure-sensitive adhesive tape of claim 15, wherein said microshear travel is less than 30 μ

m.

17. The pressure-sensitive adhesive tape of claim 5, wherein said ratio of microshear travels is less than 0.2.

18. The pressure-sensitive adhesive tape of claim 6, wherein said dynamic glass transition temperature is −

6°

C. to 4 °

C.

19. The pressure-sensitive adhesive tape of claim 8, wherein said thickness is 50 to 100 μ

m.

20. The pressure-sensitive adhesive tape of claim 9, wherein said bond strength to steel is at least 2.5 N/cm and said bond strength to PET is at least 1.0 N/cm.