Cleanly removable tapes and methods for the manufacture thereof

• US 6,866,928 B2
• Filed: 04/08/2002
• Issued: 03/15/2005
• Est. Priority Date: 04/08/2002
• Status: Expired due to Fees

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Pereyra, Rodger J., Zhou, Zhiming, Kobe, James J., Narum, Timothy N.
• Primary Examiner(s): ZIRKER, DANIEL R
• Application Number:
  US10/118,120
• Publication Number:
  US 20030190464A1
• Time in Patent Office: 1,072 Days
• Field of Search: 428/343, 428/345, 428/346, 428/354, 428/355.AC, 428/920, 428/921, 428/40.1, 248/205.3, 427/208, 427/208.2, 427/208.4
• US Class Current: 428/354
• CPC Class Codes: C09J 2301/124 the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
• 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 7/22 Plastics; Metallised plastics
• CPC Class Codes: C09J 7/38 Pressure-sensitive adhesives [PSA]
• CPC Class Codes: C09J 9/00 Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks C09J7/00 takes precedence
• CPC Class Codes: Y10S 428/92 Fire or heat protection feature
• CPC Class Codes: Y10S 428/921 Fire or flameproofing
• CPC Class Codes: Y10T 428/14 Layer or component removable to expose adhesive
• 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 428/2809 including irradiated or wave energy treated component
• CPC Class Codes: Y10T 428/2813 Heat or solvent activated or sealable
• 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

The present invention provides a multi-layer tape, comprising: a first adhesive layer comprising a pressure sensitive adhesive; a core layer having an outer surface, the first adhesive layer adhered to at least a portion of the outer surface; and fibrous reinforcing material dispersed within the core layer, the fibrous reinforcing material imparting stretch release properties to the tape. The tape may comprise a second adhesive layer wherein the outer surface comprises a first major surface and a second major surface, the first adhesive layer being adhered to the first major surface, and the second adhesive layer being adhered to the second major surface. A fire retardant may be disposed in any of the first adhesive layer, the second adhesive layer, and the core layer. The tape may be cleanly removable. The fibrous reinforcing material typically comprises substantially continuous viscoelastic microfibers having a yield strength and a tensile break strength, and the tensile break strength is at least about 150% of the yield strength. In another aspect, the tapes of the invention may be formulated to be cleanly removable without including fibrous reinforcing material therein. The invention also provides a method for the manufacture of the foregoing tape as well as an assembly comprising: a substrate; a carpet overlying the substrate; and a tape according to the invention disposed between the carpet and the substrate and adhering the carpet to the substrate.

Claims

1. A fire retardant, multi-layer carpet tape, comprising:

a first adhesive layer comprising a first pressure sensitive adhesive;

a second adhesive layer comprising a second pressure sensitive adhesive;

a core layer disposed between said first adhesive layer and said second adhesive layer;

a fire retardant disposed in at least one of the first adhesive layer or the second adhesive layer, the fire retardant being essentially free of antimony fire retardants and polybrominated biphenyls;

reinforcing microfibers disposed in the core layer, the reinforcing microfibers oriented in the machine direction of the core layer and providing stretch release properties to the carpet tape; and

the tape capable of passing (1) F.A.R.§

25.853 (July

     1990), 12 Second Vertical Burn Test; and

being cleanly removable.

2. The fire retardant, multi-layer carpet tape of claim 1 wherein the core layer comprises a fire retardant, the fire retardant being essentially free of antimony fire retardants and polybrominated biphenyls.

3. The fire retardant, multi-layer carpet tape of claim 1 wherein the fire retardant is selected from the group consisting of an intumescent fire retardant, brominated phosphate fire retardant, and combinations of the foregoing.

4. The fire retardant, multi-layer carpet tape of claim 1 further comprising a release liner adjacent to the first adhesive layer, the second adhesive layer or both the first and second adhesive layers.

5. The fire retardant, multi-layer carpet tape of claim 1, wherein the microfibers are selected from the group consisting of elastic microfibers, viscoelastic microfibers, or combination of elastic microfibers and viscoelastic microfibers.

6. The fire retardant, multi-layer carpet tape of claim 1, wherein the reinforcing microfibers are unbroken for at least about 0.5 centimeters in the machine direction of the core layer.

7. The fire retardant, multi-layer carpet tape of claim 6, wherein the reinforcing microfibers are unbroken for at least about 5 centimeters in the machine direction of the core layer.

8. The fire retardant, multi-layer carpet tape of claim 6, wherein the reinforcing microfibers have a maximum diameter within the range from about 0.05 to about 5 micrometers and an aspect ratio greater than about 1000.

15. An assembly comprising:

a substrate;

a carpet overlying the substrate; and

the tape of claim 1 disposed between the carpet and the substrate and adhering the carpet to the substrate.

9. A method for the manufacture of a tape, comprising:

Providing a core layer having an outer surface;

Applying a first adhesive layer to at least a portion of the outer surface, the first adhesive layer comprising a first pressure sensitive adhesive;

At least one of the first adhesive layer or the core layer further comprise a fire retardant selected from the group consisting of antimony free fire retardant, polybrominated biphenyl free fire retardant, intumescent fire retardant, and combinations of the foregoing, wherein the tape will pass (1) F.A.R.§

25.853 (July

     1990), 12 Second Vertical Burn Test; and

The core layer further comprising reinforcing microfibers oriented in the machine direction of the core layer, the reinforcing microfibers providing stretch release properties to the tape.

10. The method of claim 9 wherein the outer surface comprises a first major surface and a second major surface, the applying of a first adhesive layer comprises applying the pressure sensitive adhesive to the first major surface, the method further comprising applying a second adhesive layer to the second major surface.

11. The method of claim 10 wherein at least one of the first adhesive layer, the second adhesive layer, or the core layer further comprise a synergist selected from the group consisting of n-alkoxy hindered amine, tris(tribromoneopentyl)phosphate, melamine phosphate, melamine polyphosphate, and boroxo siloxane elastomer.

12. The method of claim 9 wherein the outer surface comprises a first major surface and a second major surface, the first adhesive layer adhered to the first major surface and a second adhesive layer to the second major surface, the first adhesive layer and the second adhesive layer comprising a material selected from the group consisting of acrylic polymers, polyurethanes, thermoplastic elastomers, block copolymers, polyolefins, silicones, rubber based adhesives, a blend of an acrylic adhesive and rubber based adhesive, and combinations of the foregoing.

13. The method of claim 12 wherein the core layer and at least one of the first adhesive layer or the second adhesive layer are co-extruded.

14. The method of claim 9 further comprising exposing the tape to a radiation source to cross-link at least one of the core, the first adhesive layer, or the second adhesive layer.