Masking tape and its use

• US 6,962,748 B2
• Filed: 04/27/2001
• Issued: 11/08/2005
• Est. Priority Date: 04/29/2000
• Status: Expired due to Fees

• Current Assignee: Tesa SE (Maxingvest AG)
• Original Assignee: Tesa AG (Maxingvest AG)
• Inventors: Nickel, Oliver
• Primary Examiner(s): Morris, Terrel
• Assistant Examiner(s): Chang, Victor S.
• Application Number:
  US09/844,083
• Publication Number:
  US 20020114946A1
• Time in Patent Office: 1,656 Days
• Field of Search: 428/343, 428/354, 428/40.1, 428/126, 428/194, 428/916, 428/41.7, 428/41.8, 428/42.3
• US Class Current: 428/343
• CPC Class Codes: B05B 12/24 made at least partly of flexible material, e.g. sheets of paper or fabric
• CPC Class Codes: C09J 2203/31 as a masking tape for painting
• CPC Class Codes: C09J 7/24 based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
• CPC Class Codes: Y10S 428/906 Roll or coil
• CPC Class Codes: Y10T 428/14 Layer or component removable to expose adhesive
• CPC Class Codes: Y10T 428/1471 Protective layer
• CPC Class Codes: Y10T 428/1476 Release layer
• CPC Class Codes: Y10T 428/1495 Adhesive is on removable layer
• CPC Class Codes: Y10T 428/24231 At opposed marginal edges
• CPC Class Codes: Y10T 428/24793 Comprising discontinuous or differential impregnation or bond
• 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 428/2848 Three or more layers
• CPC Class Codes: Y10T 442/2738 Coating or impregnation intended to function as an adhesive to solid surfaces subsequently associated therewith
• CPC Class Codes: Y10T 442/30 Woven fabric [i.e., woven strand or strip material]
• CPC Class Codes: Y10T 442/60 Nonwoven fabric [i.e., nonwoven strand or fiber material]

Abstract

A masking tape comprising:

• • a) a heat resistant adhesive tape comprising a flexible sheet backing and a pressure sensitive adhesive composition,
  • b) a masking material, which is laminated in an edge region of the pressure-sensitive adhesive composition, said masking material being capable of adhering to paint and absorbing paint,
  • c) a masking sheet, which is laminated onto the very same edge region of the pressure-sensitive adhesive composition,
  • d) the masking sheet covering the masking material on a side thereof.

Claims

1. A masking tape comprising:

a) a heat resistant adhesive tape comprising a flexible sheet backing and a pressure-sensitive adhesive layer applied to said backing.

b) a masking material, which is laminated in an edge region of the pressure-sensitive adhesive layer, said masking material being capable of adhering to paint and of absorbing paint, and

c) a masking sheet, which is laminated onto said edge region of the pressure-sensitive adhesive layer, the masking sheet covering the masking material on a side thereof.

2. The masking tape of claim 1, wherein the adhesive tape is a heat-resistant adhesive tape for the automobile painter with a heat resistance at temperatures up to 130°

C. (1hr).

3. The masking tape of claim 1, wherein the adhesive tape is 15 to 75 mm wide.

4. The masking tape of claim 1, wherein the masking material is selected from the group consisting of paper, woven fabric, nonwoven fabric and another sheet material capable of adhering.

5. The masking tape of claim 1, wherein the masking material is unbleached Kraft paper, having a weight of 30 to 40 g/m² and a width of 15 to 50 cm.

6. The masking tape of claim 1, wherein the masking sheet is a polyolefin sheet which has a thickness of 7 to 40 mm and a width of 0.5 to 2 m.

7. The masking tape of claim 1, wherein the masking sheet is folded so that it can be extended along me external surface of the masking material and is folded against the masking material in accordion fashion.

8. The masking tape of claim 1, wherein a portion of the edge region of the pressure-sensitive adhesive layer to which the masking material adheres is 1 to 5 mm wide and the portion of the edge region of the pressure-sensitive adhesive layer to which the masking sheet adheres is 1 to 5 mm wide.

9. The masking tape of claim 1, wherein the tape is rolled up into a roll, the masking sheet being folded and the height of the roll corresponding approximately to the width of the masking material plus the width of the adhesive tape.

10. A method comprising applying the masking tape of claim 1 to a part to be masked, and then subjecting said part to a surface treatment.

11. The masking tape of claim 2, wherein the heat-resistant adhesive tape is a fine line tape.

12. The masking tape of claim 1, wherein the flexible sheet backing is of polypropylene or soft PVC.

13. The masking tape of claim 3, wherein the adhesive tape is 19 to 30 mm wide.

14. The masking tape of claim 5, wherein the width is 20 to 40 cm.

15. The masking tape of claim 6, wherein the thickness is 8 to 20 mm.

16. The masking tape of claim 6, wherein the masking sheet is a polyethylene sheet.

17. The masking tape of claim 6, wherein the masking sheet is corona pretreated.

18. The masking tape of claim 1, wherein a portion of the edge region of the pressure-sensitive adhesive layer to which the masking material adheres is 2 to 4 mm wide and the portion of the edge region of the pressure-sensitive adhesive composition to which the masking sheet adheres is 2 to 4 mm wide.

19. The method of claim 10, wherein the part is an automobile part.

20. The method of claim 10, wherein the surface treatment is a painting treatment.