Method of manufacturing adhesive articles

Patent metadata

Field	Value
Publication number	US-9486982-B2
Application number	US-200913140043-A
Country	US
Kind code	B2
Filing date	Dec 18, 2009
Priority date	Dec 19, 2008
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

The present application is directed to a method of manufacturing an adhesive article. The method comprises providing a first extrudable feedstock comprising a pressure sensitive adhesive and providing a second extrudable feedstock comprising a polyolefin polymer having a density of no greater than 0.91 g/cc. The first extrudable feedstock and the second extrudable feedstock are coextruded in contact with each other to form a coextruded film. The method also comprises cooling the coextruded film.

First claim

What is claimed is:

1. A method of manufacturing an adhesive article comprising:
providing a first extrudable feedstock comprising a pressure sensitive adhesive or a tackified pressure sensitive adhesive, wherein the pressure sensitive adhesive or tackified pressure sensitive adhesive is an acrylic adhesive;
providing a second extrudable feedstock consisting essentially of a polyolefin polymer having a density of no greater than 0.91 g/cc or a polvolefin polymer having a density of no greater than 0.91 g/cc additionally blended with other polymers;
coextruding the first extrudable feedstock in contact with the second extrudable feedstock to form a coextruded film including an adhesive layer including the first extrudable feedstock and a release layer including the second extrudable feedstock, wherein coextruding comprises processing the feedstocks at or above their melt temperature; and
cooling the coextruded film;
wherein the pressure sensitive adhesive or tackified pressure sensitive adhesive includes between 0.5 wt % and about 10 wt % acrylic acid monomer.

2. A method of manufacturing an adhesive article comprising:
providing a first extrudable feedstock comprising a pressure sensitive adhesive or a tackified pressure sensitive adhesive, wherein the pressure sensitive adhesive or tackified pressure sensitive adhesive is an acrylic adhesive;
providing a second extrudable feedstock consisting essentially of a polyolefin polymer having a density of no greater than 0.91 g/cc or a polvolefin polymer having a density of no greater than 0.91 g/cc additionally blended with other polymers;
coextruding the first extrudabie feedstock in contact with the second extrudable feedstock to form a coextruded film including an adhesive layer including the first extrudable feedstock and a release layer including the second extrudable feedstock, wherein coextruding comprises processing the feedstocks at or above their melt temperature; and
cooling the coextruded film;
wherein the pressure sensitive adhesive or tackified pressure sensitive adhesive is an acid containing acrylic pressure sensitive adhesive.

3. A method of manufacturing an adhesive article comprising:
providing a first extrudable feedstock comprising a pressure sensitive adhesive or a tackified pressure sensitive adhesive, wherein the pressure sensitive adhesive or tackified pressure sensitive adhesive is an acrylic adhesive;
providing a second extrudable feedstock consisting essentially of a polyolefin polymer having a density of no greater than 0.91 g/cc or a polyolefin polymer having a density of no greater than 0.91 g/cc additionally blended with other polymers;
coextruding the first extrudable feedstock in contact with the second extrudable feedstock to form a coextruded film including an adhesive layer including the first extrudable feedstock and a release layer including the second extrudable feedstock, wherein coextruding comprises processing the feedstocks at or above their melt temperature; and
cooling the coextruded film;
wherein the second extrudable feedstock further comprises polyurethane.

4. A method of manufacturing an adhesive article comprising:
providing a first extrudable feedstock comprising a pressure sensitive adhesive or a tackified pressure sensitive adhesive, wherein the pressure sensitive adhesive or tackified pressure sensitive adhesive is an acrylic adhesive;
providing a second extrudable feedstock consisting essentially of a polyolefin polymer having a density of no greater than 0.91 g/cc or a polyolefin polymer having a density of no greater than 0.91 g/cc additionally blended with other polymers;
coextruding the first extrudable feedstock in contact with the second extrudable feedstock to form a coextruded film including an adhesive layer including the first extrudable feedstock and a release layer including the second extrudable feedstock, wherein coextruding comprises processing the feedstocks at or above their melt temperature; and
cooling the coextruded film;
wherein the second extrudable feedstock further comprises polylactic acid.

5. A method of manufacturing an adhesive article comprising:
providing a first extrudable feedstock comprising a pressure sensitive adhesive or a tackified pressure sensitive adhesive, wherein the pressure sensitive adhesive or tackified pressure sensitive adhesive is an acrylic adhesive;
providing a second extrudable feedstock consisting essentially of a polyolefin polymer having a density of no greater than 0.91 g/cc or a polyolefin polymer having a density of no greater than 0.91 g/cc additionally blended with other polymers;
coextruding the first extrudable feedstock in contact with the second extrudable feedstock to form a coextruded film including an adhesive layer including the first extrudable feedstock and a release layer including the second extrudable feedstock, wherein coextruding comprises processing the feedstocks at or above their melt temperature; and
cooling the coextruded film;
wherein the second extrudable feedstock further comprises a polydiorganosiloxane polyoxamide copolymer.

6. A method of manufacturing an adhesive article comprising:
providing a first extrudable feedstock comprising a pressure sensitive adhesive or a tackified pressure sensitive adhesive, wherein the pressure sensitive adhesive or tackified pressure sensitive adhesive is an acrylic adhesive;
providing a second extrudable feedstock consisting essentially of a polyolefin polymer having a density of no greater than 0.91 g/cc or a polvoiefin polymer having a density of no greater than 0.91 g/cc additionally blended with other polymers;
coextruding the first extrudable feedstock in contact with the second extrudable feedstock to form a coextruded film including an adhesive layer including the first extrudable feedstock and a release layer including the second extrudabie feedstock, wherein coextruding comprises processing the feedstocks at or above their melt temperature; and
cooling the coextruded film;
wherein coextruding additionally comprises a third extrudable feedstock in contact with the first extrudable feedstock opposite the second extrudable feedstock.

7. A method of manufacturing an adhesive article comprising:
providing a first extrudable feedstock comprising a pressure sensitive adhesive or a tackified pressure sensitive adhesive, wherein the pressure sensitive adhesive or tackified pressure sensitive adhesive is an acrylic adhesive;
providing a second extrudable feedstock consisting essentially of a polyolefin polymer having a density of no greater than 0.91 g/cc or a polyolefin polymer having a density of no greater than 0.91 g/cc additionally blended with other polymers;
coextruding the first extrudable feedstock in contact with the second extrudable feedstock, and a third extrudable feedstock in contact with the first extrudable feedstock opposite the second extrudable feedstock, to form a coextruded film including an adhesive layer including the first extrudable feedstock and a release layer including the second extrudable feedstock, wherein coextruding comprises processing the feedstocks at or above their melt temperature; and; and
cooling the coextruded film;
wherein the co-extrusion step is a blown film step.

8. The method of claim 7 , wherein a tube is formed in the blown film step, and the method comprising collapsing the tube after the coextruding step.

9. The method of claim 8 , wherein the third extrudable feedstock is an inner most layer in the tube, and the inner most layer self bonds to form a film.

10. A method of manufacturing an adhesive article comprising:
providing a first extrudable feedstock comprising a pressure sensitive adhesive or a tackified pre

Assignees

• Emslander Jeffrey O
• Fleming Danny L
• Clements George J
• 3M Innovative Properties Co

Inventors

• Emslander Jeffrey O
• Fleming Danny L
• Clements George J

Classifications

• B32B27/283

  comprising polysiloxanes · CPC title

• B32B27/16

  specially treated, e.g. irradiated · CPC title

• B32B27/32

  comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title

• B32B27/327

  comprising polyolefins obtained by a metallocene or single-site catalyst · CPC title

• B32B27/308

  comprising acrylic (co)polymers · CPC title