Abstract: Pressure sensitive adhesive tapes are manufactured by continuously extruding polypropylene to form a web which is cooled and set and slit at transversely spaced positions into a plurality of side by side continuous tapes. After slitting each tape is drawn longitudinally and heat set to effect monoaxial orientation of the tape. A release coating to the first tape surface and a coating of a pressure sensitive adhesive to the second tape surface. Each continuous tape with the release coating and the adhesive coating thereon is wound into a series of cylindrical tape spools each containing a length of the tape.

Abstract: A package of a continuous strip of material includes a plurality of parallel side by side stacks each containing a length of the strip which is folded back and forth such that each folded portion of the stack is folded relative to the next portion about a line transverse to the strip and such that the side edges of the strip portions are aligned. The strip is continuous through each stack and is connected by a splice from the end of one stack to beginning of the next stack. The package can be compressed to reduce the height of the stacks and maintained in the compressed condition by an evacuated sealed bag. The package can be formed by folding a wide web of material back and forth and by slicing the folded web in a direction parallel to the sides of the web to form one or more stacks of a strip of width less than that of the web. The stack can be used to form the above package or can be used in a further processing by unfolding slitting and winding.

Abstract: A package of a continuous strip of material includes a plurality of parallel side by side stacks each containing a length of the strip which is folded back and forth such that each folded portion of the stack is folded relative to the next portion about a line transverse to the strip and such that the side edges of the strip portions are aligned. The strip is continuous through each stack and is connected by a splice from the end of one stack to beginning of the next stack. The package can be compressed to reduce the height of the stacks and maintained in the compressed condition by an evacuated sealed bag. The package can have the stacks vertical or horizontal. The stacks are connected by a spliced portion so that the strip is continuous through the package. When the stacks are horizontal, the spliced portions are vertical and coplanar with the strips and at alternate ends. When the stacks are vertical, the spliced portions extend from the bottom to the top at one end of the stack.

Abstract: A package of a continuous strip of material includes a plurality of parallel side by side stacks each containing a length of the strip which is folded back and forth such that each folded portion of the stack is folded relative to the next portion about a line transverse to the strip and such that the side edges of the strip portions are aligned. The stacks are formed in a stepped fashion, with a series of separate layers being laid down for each stack. The package can be compressed to reduce the height of the stacks and maintained in the compressed condition by an evacuated sealed bag.