Abstract: The present invention relates to a film comprising a low density linear ethylene copolymer of ethylene and a higher olefin and up to about 10 percent by weight of the total composition of an acrylic polymer.

Abstract: The present invention relates to a film comprising a low density linear ethylene copolymer of ethylene and a higher olefin and up to about 10 percent by weight of the total composition of an acrylonitrile homopolymer or copolymer.

Abstract: There is disclosed a modified method of preparing a blown polyethylene film made from a blend of major proportion of a polyethylene resin, e.g., LLDPE, a minor proportion of a second polymeric resin, e.g., polystyrene, and at least one additive, e.g., a colorant. The additive or additives are mixed with the second polymeric resin and the resulting mixture is then blended with the polyethylene resin, thereby reducing the number of process steps. Also disclosed is a method of monitoring and/or controlling the second polymeric resin content in the film made with known proportions of a colorant and the second polymeric resin by measuring the light transmission of the film.

Abstract: A longitudinally ribbed plastic film is produced by extruding through a pair of die lips, at least one of which is provided with slots which run at an angle to the direction of resin flow across the die lips. Impurities in the resin tend to collect in the slots, and thus in the ribs of the film. This occurs because of the shear stress field created by the slots. A high melt viscosity component of a multi-layer coextrusion behaves in a fashion similar to the impurities and is substantially extruded in the ribs.

Abstract: The present invention relates to thermoplastic bag structures which are characterized by having a pair of carrying handles formed integrally with the bag walls and extending upwardly from opposite sides of the open mouth portion of the bag. Specifically, such handled bags are particularly characterized in having reinforced handle members where the handles comprise at least two layers of thermoplastic material, one of the layers imparting tensile strength to the individual layer and the other layer particularly employed to provide the requisite puncture and tear resistance necessary in such a bag structure.

Abstract: A thermoplastic bag characterized by having handles formed on opposite ends of the bag mouth which is characterized by having structural features immediately adjacent the mouth of the bag to provide stress relief at those positions on the bag mouth where maximum stress is concentrated when such bags are being filled with product and eventually carried by the user. The stress redistribution feature is characterized by an area or areas, immediately adjacent the mouth portion of the bag and the base of the handle members, which are characterized by having a plurality of narrow pleats which are impressed into the bag structure by die members during formation of the individual bag.

Abstract: A thermoplastic bag characterized by having handles formed on opposite ends of the bag mouth which is characterized by having structural features immediately adjacent the mouth of the bag to provide stress relief at those positions on the bag mouth where maximum stress is concentrated when such bags are being filled with product and eventually carried by the user. The stress redistribution feature is characterized by an area or areas, immediately adjacent the mouth portion of the bag and the base of the handle members, which are characterized by having a plurality of narrow pleats which are impressed into the bag structure by die members during formation of the individual bag.