Adhesive tape

Claim 2

A non-porous pressure-sensitive adhesive tape for general and surgical uses, consisting of the mechanical combination of: a closely woven synthetic fiber fabric backing having a smooth surface and having a number of warp threads parallel to each other and perpendicular to a lesser number of weft threads also parallel to each other; a primer on one face of said backing bonding the fibers of said backing together throughout and providing the effect of a solid impervious sheet; a pressure-sensitive adhesive layer directly on and carried by the inner face of said primer sufficiently positively to prevent delamination when said tape is in use; the tape being physically characterized by its capability of being torn by hand with a force from start of the tear to the end of the tear of less than one pound either transversely or longitudinally of the tape, resultIng in a straight line tear leaving clean and smooth unfrayed edges free from stretching or curling, and regardles of where the tear is started at any side or end edge of the tape; and said backing being woven of rayon acetate threads, the thread count being in the neighborhood of 180 warp threads and 54 weft threads per square inch.

Claim 3

A non-porous pressure-sensitive adhesive tape for general and surgical uses, consisting of the mechanical combination of: a closely woven synthetic fiber fabric backing having a smooth surface and having a number of warp threads parallel to each other and perpendicular to a lesser number of weft threads also parallel to each other; a primer on one face of said backing bonding the fibers of said backing together throughout and providing the effect of a solid impervious sheet; a pressure-sensitive adhesive layer directly on and carried by the inner face of said primer sufficiently positively to prevent delamination when said tape is in use; the tape being physically characterized by its capability of being torn by hand with a force from start of the tear to the end of the tear of less than one pound either transversely or longitudinally of the tape, resulting in a straight line tear leaving clean and smooth unfrayed edges free from stretching or curling, and regardless of where the tear is started at any side or end edge of the tape; said primer alone performing the double function of bonding the threads of said backing and acting as a positive anchor coating for said adhesive, the thread count being in the neighborhood of 180 warp threads and 54 weft threads per square inch.

Claim 4

A non-porous pressure-sensitive adhesive tape for general and surgical uses, consisting of the mechanical combination of: a closely woven synthetic fiber fabric backing having a smooth surface and having a number of warp threads parallel to each other and perpendicular to a lesser number of weft threads also parallel to each other; a primer on one face of said backing bonding the fibers of said backing together throughout and providing the effect of a solid impervious sheet; a pressure-sensitive adhesive layer directly on and carried by the inner face of said primer sufficiently positively to prevent delamination when said tape is in use; the tape being physically characterized by its capability of being torn by hand with a force from start of the tear to the end of the tear of less than one pound either transversely or longitudinally of the tape, resulting in a straight line tear leaving clean and smooth unfrayed edges free from stretching or curling, and regardless of where the tear is started at any side or end edge of the tape; said primer alone performing the double function of bonding the threads of said backing and acting as a positive anchor coating for said adhesive, the thread count being in the neighborhood of 180 warp threads and 54 weft threads per square inch.

Claim 5

A non-porous pressure-sensitive adhesive tape for general and surgical uses, consisting of the mechanical combination of: a closely woven synthetic fiber fabric backing having a smooth surface and having a number of warp threads parallel to each other and perpendicular to a lesser number of weft threads also parallel to each other; a primer on one face of said backing bonding the fibers of said backing together throughout and providing the effect of a solid impervious sheet; a pressure-sensitive adhesive layer directly on and carried by the inner face of said primer sufficiently positively to prevent delamination when said tape is in use; and the tape being physically characterized by its capability of being torn by hand with a force from start of the tear to the end of the tear of less than one pound either transversely or longitudinally of the tape, resulting in a straight line tear leaving clean and smooth unfrayed edges free from stretching or curling, and regardless of where the tear is started at any side or end edge of the tape.

Claim 6

A non-porous pressure-sensitive adhesive tape for general and surgical uses, consisting of the mechanical combination of: a closely woven synthetic fiber fabric backing having a smooth surface and having a number of warp threads parallel to each other and perpendicular to a lesser number of weft threads also parallel to each other; a primer on one face of said backing bonding the fibers of said backing together throughout and providing the effect of a solid impervious sheet; a pressure-sensitive adhesive layer directly on and carried by the inner face of said primer sufficiently positively to prevent delamination when said tape is in use; and the tape being physically characterized by its capability of being torn by hand with a force from start of the tear to the end of the tear of less than one pound either transversely or longitudinally of the tape, resulting in a straight line tear leaving clean and smooth unfrayed edges free from stretching or curling, and regardless of where the tear is started at any side or end edge of the tape.

Claim 7

The adhesive tape of claim 3, wherein said primer is compatible with said adhesive to such an extent that the adhesive may be calendered directly to the face of the primer.

Claim 8

The adhesive tape of claim 3, wherein said primer is a solvent-based polymer.

Claim 9

The adhesive tape of claim 3, wherein said primer is an acrylic polymer solution prepared in n-heptane as a solvent.

Claim 10

A non-porous pressure-sensitive adhesive tape for general and surgical uses, consisting of the mechanical combination of: a closely woven sythetic fiber fabric backing having a smooth surface and having a number of warp threads parallel to each other and perpendicular to a lesser number of weft threads also parallel to each other; a primer on one face of said backing bonding the fibers of said backing together throughout and providing the effect of a solid impervious sheet; a pressure-sensitive adhesive layer directly on and carried by the inner face of said primer sufficiently positively to prevent delamination when said tape is in use; the tape being physically characterized by its capability of being torn by hand with a force from start of the tear to the end of the tear of less than one pound either transversely or longitudinally of the tApe, resulting in a straight line tear leaving clean and smooth unfrayed edges free from stretching or curling, and regardless of where the tear is started at any side or end edge of the tape; and said primer being an acrylic primer which does not objectionably stiffen said backing, and which primer is characterized by having average properties in the neighborhood of solids-45 percent, Brookfield Viscosity-2,200 cps., Williams Plasticity-2.7 mm., tack under a probe test of 2,500 grams per square centimeter, and a specific gravity when wet of 0.83.

Claim 11

A non-porous pressure-sensitive adhesive tape for general and surgical uses, consisting of the mechanical combination of: a closely woven sythetic fiber fabric backing having a smooth surface and having a number of warp threads parallel to each other and perpendicular to a lesser number of weft threads also parallel to each other; a primer on one face of said backing bonding the fibers of said backing together throughout and providing the effect of a solid impervious sheet; a pressure-sensitive adhesive layer directly on and carried by the inner face of said primer sufficiently positively to prevent delamination when said tape is in use; the tape being physically characterized by its capability of being torn by hand with a force from start of the tear to the end of the tear of less than one pound either transversely or longitudinally of the tApe, resulting in a straight line tear leaving clean and smooth unfrayed edges free from stretching or curling, and regardless of where the tear is started at any side or end edge of the tape; and said primer being an acrylic primer which does not objectionably stiffen said backing, and which primer is characterized by having average properties in the neighborhood of solids-45 percent, Brookfield Viscosity-2,200 cps., Williams Plasticity-2.7 mm., tack under a probe test of 2,500 grams per square centimeter, and a specific gravity when wet of 0.83.

Claim 12

The adhesive tape of claim 3, wherein said primer prevents moisture applied to said backing from reaching said adhesive and prevents said adhesive from coming into contact with said backing when applied to the underface of said primer.

Claim 13

The adhesive tape of claim 3, wherein the primer alone is multi-functional in that it prevents the adhesive from contacting the backing when applied to the primer, prevents water and soap and other moisture passing through the backing from reaching the adhesive, bonds the threads of the backing throughout, and acts as an effective anchor coating for the adhesive preventing delamination and permitting calendering of the adhesive directly to the primer.

Claim 14

A NON-POROUS PRESSURE-SENSITIVE ADHESIVE TAPE FOR GENERAL AND SURGICAL USES CONSISTING OF A HIGH THREAD COUND WOVEN CELLULOSIC SYNTHETIC FIBER BACKING IN WHICH THE WARP THREADS ARE PARALLEL TO EACH OTHER, THE WEFT THREADS ARE PARALLEL TO EACH OTHER AND PERPENDICULAR TO THE WARP THREADS, THE THREAD COUNT BEING IN THE NEIGHBORHOOD OF 180 WARP THREADS AND 54 WEFT THREADS PER SQUARE INCH, AN ACRYLIC POLYMER PRIMER ON ONE FACE OF SAID BACKING, AND A PRESSURE-SENSITIVE ADHESIVE LAYER CONTAINING BOTH NATURAL AND SYNTHETIC RUBBER APPLIED DIRECTLY OVER SAID PRIMER, THE PRIMER FULLY COVERING THE FACE OF THE BACKING SO AS TO PREVENT THE ADHESIVE LAYER CONTACTING THE BACKING WHEN APPLIED TO THE PRIMER AND TO PREVENT MOISTURE FROM PASSING FROM THE BACKING TO THE ADHESIVE, SAID TAPE BEING

Claim 15

A NON-POROUS PRESSURE-SENSITIVE ADHESIVE TAPE FOR GENERAL AND SURGICAL USES CONSISTING OF A HIGH THREAD COUND WOVEN CELLULOSIC SYNTHETIC FIBER BACKING IN WHICH THE WARP THREADS ARE PARALLEL TO EACH OTHER, THE WEFT THREADS ARE PARALLEL TO EACH OTHER AND PERPENDICULAR TO THE WARP THREADS, THE THREAD COUNT BEING IN THE NEIGHBORHOOD OF 180 WARP THREADS AND 54 WEFT THREADS PER SQUARE INCH, AN ACRYLIC POLYMER PRIMER ON ONE FACE OF SAID BACKING, AND A PRESSURE-SENSITIVE ADHESIVE LAYER CONTAINING BOTH NATURAL AND SYNTHETIC RUBBER APPLIED DIRECTLY OVER SAID PRIMER, THE PRIMER FULLY COVERING THE FACE OF THE BACKING SO AS TO PREVENT THE ADHESIVE LAYER CONTACTING THE BACKING WHEN APPLIED TO THE PRIMER AND TO PREVENT MOISTURE FROM PASSING FROM THE BACKING TO THE ADHESIVE, SAID TAPE BEING