CLEAN RELEASE, STRETCH RELEASABLE TAPE

• US 20150020961A1
• Filed: 02/25/2013
• Published: 01/22/2015
• Est. Priority Date: 03/08/2012
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Grisle, Roger A., Munson, Harold T.
• Granted Patent: US 10,017,670 B2
• Time in Patent Office: Days
• US Class Current: 156/247
• CPC Class Codes: B32B 15/088 comprising polyamides
• CPC Class Codes: B32B 15/09 comprising polyesters
• CPC Class Codes: B32B 2250/02 2 layers
• CPC Class Codes: B32B 2250/03 3 layers
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2307/748 Releasability
• CPC Class Codes: B32B 2311/24 Aluminium
• CPC Class Codes: B32B 2311/30 Iron, e.g. steel
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: B32B 2377/00 Polyamides
• CPC Class Codes: B32B 2405/00 Adhesive articles, e.g. adhesive tapes labels B32B2519/00
• CPC Class Codes: B32B 37/12 characterised by using adhesives
• CPC Class Codes: B32B 38/10 Removing layers, or parts of layers, mechanically or chemically
• CPC Class Codes: B32B 7/06 permitting easy separation
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C08G 2261/126 block
• CPC Class Codes: C08L 67/00 Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain of polyester-amides C08L77/12; of polyester-imides C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 77/00 Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: C09J 133/08 Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C09J 171/02 : Polyalkylene oxides
• CPC Class Codes: C09J 2433/00 : Presence of (meth)acrylic polymer
• CPC Class Codes: C09J 2467/006 : in the substrate
• CPC Class Codes: C09J 2477/006 : in the substrate
• CPC Class Codes: C09J 7/25 : based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
• CPC Class Codes: C09J 7/255 : Polyesters
• CPC Class Codes: C09J 7/385 : Acrylic polymers
• 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
• CPC Class Codes: Y10T 428/31699 : Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/3175 : Next to addition polymer from unsaturated monomer[s]
• CPC Class Codes: Y10T 428/31797 : Next to addition polymer from unsaturated monomers

Abstract

Adhesive tape for bonding that can be detached without leaving residue and without damaging the surface of a substrate when stretched in a direction of a bond plane. An adhesive tape includes an elastomeric backing having opposing first and second surfaces an acrylate pressure sensitive adhesive disposed on at least one of the first and second surfaces of the backing. The backing includes a copolymer selected from the group consisting of polyether-polyester, polyether-polyamide, and a combination thereof and from about about 20 to 60 wt % of a tackifier, based on the total weight of the backing. The backing has an elongation at break greater than 500%.

Claims

1. An adhesive tape comprising:

(a) an elastomeric backing having opposing first and second surfaces, the backing comprising (i) a copolymer selected from the group consisting of polyether-polyester, polyether-polyamide, and a combination thereof and (ii) from about 20 to 60 wt % of a tackifier, based on the total weight of the backing, and wherein the backing has an elongation at break greater than 500%; and

(b) an acrylate pressure sensitive adhesive disposed on at least one of the first and second surfaces of the backing,

wherein when the article is disposed on a substrate, the article is capable of being stretched along a first direction and release from the substrate.

2. The adhesive tape of claim 1, wherein the adhesive tape does not include a tab to initiate the stretching.

3. The adhesive tape of claim 1, wherein after the adhesive tape is stretched along a major axis and is released from the substrate, greater than 90% of the substrate surface previously in contact with the adhesive is free of adhesive residue.

4. The adhesive tape of claim 1, wherein after the adhesive tape is stretched along a major axis and is released from the substrate, substantially no adhesive residue remains on the substrate.

5. The adhesive tape of claim 1, wherein the backing has an elongation at break greater than 800%.

6. The adhesive tape of claim 1, wherein the tackifier is selected from the group consisting of terpene resins, terpene phenol resins, aromatic modified terpene resins, cumarone-indene resin, natural resin rosin, modified rosin, glycerol ester rosin, pentaerythritol ester rosin, ally(phenoI formaldehyde resins, xylene formaldehyde resins, styrene resins, dicyclopentadiene resins, and mixtures thereof.

7. The adhesive tape of claim 6, wherein the tackifier is selected from the group consisting of terpene resins, terpene phenol resins, aromatic modified terpene resins and mixtures thereof.

8. An article comprising

(a) a first substrate;

(b) an adhesive tape adhered to the first substrate, the adhesive tape comprising

(1) an elastomeric backing having opposing first and second surfaces, the backing comprising;

(i) a copolymer selected from the group consisting of polyether-polyester, polyether-polyamide, and a combination thereof; and

(ii) from about 20 to 60 wt % of a tackifier, based on the total weight of the backing, and wherein the backing has an elongation at break greater than 500%; and

(2) an acrylate pressure sensitive adhesive disposed on at least one of the first and second surfaces of the backing

9. The article of claim 8, wherein the substrate is selected from the group consisting of metal, glass and polymers.

10. The article of claim 8 further comprising a second substrate and wherein the adhesive tape comprises acrylate adhesives on the first and second surfaces of the elastomeric backing and wherein the adhesive tape is sandwiched in between and adheres to the first and second substrates.

11. The article of claim 8, wherein the adhesive tape does not include a tab to initiate the stretching.

12. The adhesive tape of claim 8, wherein after the adhesive tape is stretched along a major axis and is released from the substrate, greater than 90% of the substrate surface previously in contact with the adhesive is free of adhesive residue.

13. The article of claim 8, wherein after the adhesive tape is stretched along a major axis and is released from the first substrate, substantially no adhesive residue remains on the first substrate.

14. The article of claim 8, wherein the backing has an elongation at break greater than 800%.

15. The article of claim 8, wherein the tackifier is selected from the group consisting of terpene resins, terpene phenol resins, aromatic modified terpene resins, cumarone-indene resin, natural resin rosin, modified rosin, glycerol ester rosin, pentaerythritol ester rosin, allylphenol formaldehyde resins, xylene formaldehyde resins, styrene resins, dicyclopentadiene resins and mixtures thereof.

16. The adhesive tape of claim 15, wherein the tackifier is selected from the group consisting of terpene resins, terpene phenol resins, aromatic modified terpene resins and mixtures thereof.

17. A method of coupling and decoupling a stack of substrates, the method comprising the steps of:

(a) providing a first and a second substrate;

(b) adhering the adhesive tape between the first and the second substrates thereby coupling them to the stack, the adhesive tape comprising;

(1) an elastomeric backing having opposing first and second surfaces, the backing comprising (i) a copolymer selected from the group consisting of polyether-polyester, polyether-polyamide, and a combination thereof; and

(ii) from about 20 to 60 wt % of a tackifier, based on the total weight of the backing, and wherein the backing has an elongation at break greater than 500%; and

(2) an acrylate pressure sensitive adhesive disposed on the first and second surfaces of the backing;

(c) heating the stack to the softening temperature of the tape adhesive;

(d) removing the first substrate from the stack to expose the adhesive tape; and

(e) pulling the adhesive tape along its length to stretch release the adhesive tape from the second substrate.

18. The method of coupling and decoupling a stack of substrates of claim 17, wherein after the adhesive tape is pulled along its length and is released from the second substrate, greater than 90% of the substrate surface previously in contact with the adhesive is free of adhesive residue.

19. The method of coupling and decoupling a stack of substrates of claim 17, wherein after the adhesive tape is pulled along its length and is released from the second substrate, substantially no adhesive residue remains on the substrate.

20. The method of coupling and decoupling a stack of substrates of claim 17, wherein the tackifier is selected from the group consisting of terpene resins, terpene phenol resins, aromatic modified terpene resins, cumarone-indene resin, natural resin rosin, modified rosin, glycerol ester rosin, pentaerythritol ester rosin, allylphenol formaldehyde resins, xylene, formaldehyde resins, styrene resins, dicyclopentadiene resins and mixtures thereof.