Foam slabs and methods and apparatus, including foaming dies, for making and using foam slabs.

A modified ethylene polymer having high fuel barrier property and excellent adhesion and mechanical strength, and also uses thereof are provided. The modified ethylene polymer, in which at least part of the ethylene polymer is graft-modified with an unsaturated carboxylic acid or a derivative thereof, has a graft modification of 0.15% by weight to 0.40% by weight, and has an elution amount at 80° C. or lower as determined by cross-fractionation chromatography that is not more than 10% by weight.

The invention provides a coextrusion feedblock having a flow adjuster, a viscosity compensation device, an actuator, a central extrusion conduit, and a coextrusion conduit. The invention also provides a coextrusion profiling insert assembly constructed to be mounted in a coextrusion feedblock. The insert assembly has a flow adjuster, a viscosity compensation device, and an actuator. The insert assembly when mounted in the feedblock has a coextrusion conduit extending between the flow adjuster and the viscosity compensation device. The actuator is adjustable to apply force to bend the viscosity compensation device and thereby adjust a gap height of the coextrusion conduit. Also provided is a method of operating a feedblock having a viscosity compensation device comprising a flex region, a central extrusion conduit, and a coextrusion conduit. Force is applied to bend the flex region of the viscosity compensation device and thereby adjust a gap height of the coextrusion conduit.

A packaging film includes an inner layer for contacting a packaged subject, a first adhesive layer, a gas barrier layer, a second adhesive layer and an outer layer which are laminated in that order; wherein the inner layer contains linear low-density polyethylene in an amount of more than 40% by mass and no more than 90% by mass and low-density polyethylene and/or high-density polyethylene, does not contain any leachable components and has at least 0.920 g/cm.sup.3 density and at least 50 μm thickness; the first and second adhesive layers, contain antioxidants, and has less than 30 μm thickness; and the first adhesive layer, the gas barrier layer and the second adhesive layer have less than 30 μm thickness.

The present invention provides an optical film containing an additive. The optical film includes a high concentration portion containing the additive, and a low concentration portion containing the additive at a concentration lower than the high concentration portion. The low concentration portion is provided on both sides of the high concentration portion in a thickness direction of the optical film, and the low concentration portion is provided on both sides of the high concentration portion in a width direction of the optical film.

An apparatus and method for forming as extruded variegated plastic profile, including a multi-manifold slotted feed block assembly having a primary input manifold assembly, a secondary input manifold assembly, a flow distribution assembly in fluid communication with the primary input manifold assembly and the secondary input manifold assembly, a zone assembly having at least one restrictor and at least one mixer, and optionally, an extra line manifold assembly in communication with the flow distribution assembly.

An apparatus and method for forming as extruded variegated plastic profile, including a multi-manifold slotted feed block assembly having a primary input manifold assembly, a secondary input manifold assembly, a flow distribution assembly in fluid communication with the primary input manifold assembly and the secondary input manifold assembly, a zone assembly having at least one restrictor and at least one mixer, and optionally, an extra line manifold assembly in communication with the flow distribution assembly.

An integral geogrid includes a plurality of interconnected, oriented strands having an array of openings therein that is produced from a coextruded multilayer polymer sheet starting material. By virtue of the construction, the coextruded multilayer sheet components provide a crystalline synergistic effect during extrusion and orientation of the integral geogrid, resulting in enhanced material properties that provide performance benefits to use of the integral geogrid in soil geosynthetic reinforcement.

An integral geogrid includes a plurality of interconnected, oriented strands having an array of openings therein that is produced from a coextruded multilayer polymer sheet starting material. By virtue of the construction, the coextruded multilayer sheet components provide a crystalline synergistic effect during extrusion and orientation of the integral geogrid, resulting in enhanced material properties that provide performance benefits to use of the integral geogrid in soil geosynthetic reinforcement.

Films may be used as interleaves between hard and non-compressible surfaces such as surfaces of sheets or plates made of glass, metal, such as steel, polycarbonate, and/or poly(methyl methacrylate). The films may be embossed and/or may include a foamed core layer having a plurality of micro-voids. In particular, the films may include a polyolefin, a basis weight of between about 30 gsm and about 70 gsm, an embossed thickness of between about 150 microns and 800 microns, and a stiffness of between about 150 grams and about 750 grams according to the Circular Bend Stiffness Test.