MEDICAL DIAGNOSTIC STRIP

• US 20070287181A1
• Filed: 07/19/2007
• Published: 12/13/2007
• Est. Priority Date: 03/18/2004
• Status: Abandoned Application

• Current Assignee: Tesa SE (Maxingvest AG)
• Original Assignee: Tesa AG (Maxingvest AG)
• Inventors: Neubert, Ingo, Bunde, Bernd
• Application Number:
  US11/780,278
• Publication Number:
  US 20070287181A1
• Time in Patent Office: Days
• US Class Current: 436/2
• 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

Medical diagnostic strips for the analysis of biological fluids, comprising a carrier material coated on one or both sides with not more than 20 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. A medical diagnostic strip, comprising a base layers a plurality of individual functional layers on top of said base layers said functional layers being connected to a hydrophilic top tape by a double-sided pressure-sensitive adhesive tape, said pressure-sensitive adhesive 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. Medical diagnostic strip 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. Medical diagnostic strip according to claim 1, wherein the polymers of the pressure-sensitive adhesive have a K value of greater than 60 Pa*s.

4. Medical diagnostic strip according claim 1, wherein the shear deformation 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. Medical diagnostic strip according to claim 1, wherein the ratio of the shear deformation, μ

S2/μ

S1, is less than 0.3.

6. Medical diagnostic strip 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. Medical diagnostic strip according to claim 1, wherein the pressure-sensitive adhesive contains no additions at all of tackifier resins or plasticizers.

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

m.

9. Medical diagnostic strip 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.

10. Medical diagnostic strip according to claim 1, wherein said carrier material is composed of PET.

11. Medical diagnostic strip according to claim 1, comprising an adhesion promoter between the carrier material and the pressure-sensitive adhesives.

12. A method for analyzing biological fluids which comprises analyzing said biological fluids with the medical diagnostic strip of claim 1.

13. The medical diagnostic strip 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.

14. The medical diagnostic strip of claim 4, wherein said shear deformation is less than 60 μ

m.

16. The medical diagnostic strip of claim 5, wherein said ratio of shear deformations is less than 0.2.

17. The medical diagnostic strip of claim 6, wherein said dynamic glass transition temperature is −

6°

C. to 4°

C.

18. The medical diagnostic strip of claim 8, wherein said thickness is 50 to 100 μ

m.

19. The medical diagnostic strip 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.

15. The medical diagnostic strip of claim 15, wherein said shear deformation is less than 30 μ

m.