Pressure sensitive adhesive strips and sheets

Claim 2

A PERMANENTLY COMPRESSIBLE PRESSURE SENSITIVE COMPOSITE STRAND ADAPTED FOR ATTACHMENT TO AN AUTOMOBILE BODY CONSISTING ESSENTIALLY OF A TACKY PERMANENTLY COMPRESSIBLE, NONPOROUS COHESIVE BASE STRAND HAVING A THICKNESS OF ABOUT 0.03 TO 0.08 INCH, SAID BASE STRAND HAVING LITTLE OR NO RESILIENCE AND CONSTITUTED BY ELASTOMERIC MATERIAL COMPOUNDED WITH FROM 0.45 TO 0.5 TIMES THE WEIGHT OF ELASTOMERIC MATERIAL OF LOW VOLATILE LIQUID PLASTICIZER AND FINELY DIVIDED SOLIDS IN AN AMOUNT OF AT LEAST 0.93 PARTS PER PART OF ELASTOMERIC MATERIAL, THE FINELY DIVIDED SOLIDS INCLUDING FROM 0.5 TO 2 1/2 PARTS, PER PART OF ELASTOMERIC MATERIAL, OF FINELY DIVIDED BULK FIBROUS SOLIDS OR SOLIDS THAT FORM THIOXOTROPIC MIXTURES WITH THE SAID LIQUID PLASTICIZER, SAID BASE STRAND BEING COATED WITH A PRESSURE SENSITIVE ADHESIVE, AND SAID BASE STRAND BEING PERMANENTLY DEFORMABLE BY PRESSURE ABOVE ABOUT 15 POUNDS PER SQUARE INCH, BUT EXHIBITING NEGLIGIBLE FLOW AT 0.6 POUNDS PER SQUARE INCH PRESSURE.

Claim 3

A composite strand as recited in claim 1 in which said base strand is about 0.03 to 0.05 inch thick.

Claim 4

A composite strand as recited in claim 1 in which said elastomeric material includes 5 to 15% of thermoplastic rubber, the balance being uncured polybutylene.

Claim 5

A composite strand as recited in claim 1 in which the low volatile plasticizer is present in an amount of from 0.75 to 1.5 times the weight of the elastomeric material, the finely divided solids are present in an amount of from 1.5 to 3.0 times the weight of the elastomeric material, and these solids include from 0.8 to 1 1/2 parts per part of elastomeric material of bulk fibrous solids or solids that form thixotropic mixtures.

Claim 6

A composite trim strip comprising a strip of plastic trim material having an ornamental surface and an attaching surface, and a permanently compressible pressure sensitive composite strand having a thickness of about 0.03 to 0.08 inch, said strand being coated on both sides with a pressure sensitive adhesive having one of its pressure sensitive coated sides adhered to said attaching surface and the other of its pressure sensitive coated sides covered with a release layer, said composite strand consisting essentially of a tacky permanently compressible, nonporous cohesive base strand having little or no resilience and constituted by elastomeric material compounded with from 0.45 to 2.5 times the weight of elastomeric material of low volatilE liquid plasticizer and finely divided solids in an amount of at least 0.93 parts per part of elastomeric material, the finely divided solids including from 0.5 to 2 1/2 parts, per part of elastomeric material, of finely divided bulk fibrous solids or solids that form thixotropic mixture with the said liquid plasticizer, and said base strand being permanently deformable by pressure above about 15 pounds per square inch, but exhibiting negligible flow at 0.6 pounds per square inch pressure.

Claim 7

A composite trim strip comprising a strip of plastic trim material having an ornamental surface and an attaching surface, and a permanently compressible pressure sensitive composite strand having a thickness of about 0.03 to 0.08 inch, said strand being coated on both sides with a pressure sensitive adhesive having one of its pressure sensitive coated sides adhered to said attaching surface and the other of its pressure sensitive coated sides covered with a release layer, said composite strand consisting essentially of a tacky permanently compressible, nonporous cohesive base strand having little or no resilience and constituted by elastomeric material compounded with from 0.45 to 2.5 times the weight of elastomeric material of low volatilE liquid plasticizer and finely divided solids in an amount of at least 0.93 parts per part of elastomeric material, the finely divided solids including from 0.5 to 2 1/2 parts, per part of elastomeric material, of finely divided bulk fibrous solids or solids that form thixotropic mixture with the said liquid plasticizer, and said base strand being permanently deformable by pressure above about 15 pounds per square inch, but exhibiting negligible flow at 0.6 pounds per square inch pressure.

Claim 8

A composite trim strip as recited in claim 5 in which said strip of plastic is constituted by polyvinyl chloride at the surface thereof which is attached to said base strand, and said pressure sensitive adhesive is a copolymer of an acrylic acid ester containing at least 4 carbon atoms with from 3-12% of acrylic acid, methacrylic acid, acrylamide, methacrylamide, itaconic acid, or acrylonitrile, or mixtures thereof.