Abstract:
A process for bundling and/or fixing of articles using an extensible plastic tape having a Young modulus of at least approximately 170 bars but less than 7,000 bars and an extensibility in longitudinal direction of at least approximately 150%, with a recovery of less than 50 percent after extension, at least portions of the length of the plastic tape being free of pressure sensitive adhesive. In the process a) the plastic tape is permanently stretched, the permanently stretched tape is arranged around the articles to be bundled and/or fixated, and the ends of the tape are bound together; or b) the plastic tape is permanently stretched, one of its ends is then fixed, and thereafter the permanently stretched plastic tape is arranged around the articles to be bundled and/or fixated, and the other of its ends is fixed; and/or c) one of the ends of the plastic tape is fixed, the plastic tape is permanently stretched and arranged around the articles to be bundled and/or fixated, and the other of its ends is fixed.
Abstract:
Strip of an adhesive film for a bond which can be redetached without residue, based on thermoplastic rubber and tackifying resins, the adhesive film possessing high elasticity and low plasticity and the adhesion being less than the cohesion, the adhesion disappearing when the film is extended, the ratio of pulling force to tearing load being at least 1:1.5, and an adhesive bond produced therewith being able to be separated by pulling on the adhesive film in the direction of the bonding plane, one end of the strip being provided on both sides with a covering which is adhesive on the side facing the adhesive film and which serves at the same time as a grip tab for pulling.
Abstract:
Adhesive film strip for an adhesive bond which can be separated again by pulling on the strip in the direction of the bond plane, character in that the bond area decreases at one end of the adhesive film strip, while the other end serves as tab for pulling.
Abstract:
Film-backed pressure-sensitive adhesive tape that resembles conventional creped paper-backed masking tape but can be torn cleanly with the fingers, is prepared by extruding an isotactic polypropylene film, passing it through the nip between a rubber roll and a water-cooled embossed steel roll at a temperature and rate such that predominantly crystalline film is obtained. The embossed roll imparts a ridge-and-valley configuration to one surface of the film, valleys extending crosswise of the tape and having a depth greater than half the total film thickness. When the smooth face of the film is coated with pressure-sensitive adhesive, the resultant tape can be torn readily, using only the fingers, in a straight line crosswise of the tape. When subjected to a stretching force in the machine direction (at right angles to the ridges and valleys), the tape elongates uniformly without "necking down."
Abstract:
The invention relates to an adhesive tape having a base material which is stretched more highly at right angles to the web direction than in the web direction, contains polypropylene as the main component, and is provided with at least one pressure-sensitive or heat-sealable adhesive layer, characterized in that the base material is foamed and that the stretch ratio in the web direction is 1:1 to 1:4 and at right angles to the web direction is 1:3 to 1:8, the stretch ratio at right angles to the web direction being greater than the stretch ratio in the web direction.
Abstract:
A highly conformable adhesive tape which comprises a highly extensible and elastic backing film laminated with an adhesive layer to form the tape. The adhesive is a normally tacky and pressure-sensitive elastomeric adhesive coated on at least one of the film surfaces. The film possesses a lengthwise elongation to break of at least about 200 percent, and a 50 percent rubber modulus of not above about 2,000 lbs./sq. inch. The tape is easily stretchable and normally may be removed easily from an application surface by stretching the tape lengthwise in a direction substantially parallel to the surface. This characteristic is highly important in medical applications where painless removal is desirable.