Abstract: The present invention provides a foamed film for shrink labels which is capable of being accommodated by the new continuous attachment system for shrink labels, and in which a long foamed film for shrink labels is wound around the body of a container, and is cut at the inner-position where the film overlaps, after which the two ends of the resulting film unit are joined together to form a cylindrical shape, and this is subsequently heated to cause heat shrinkage of the film and to produce the label. The foamed film for shrink labels of the present invention is a film which stretches a blown film with an expansion ratio of 1.3 to 5 in the longitudinal direction (vertical direction or extrusion direction) so that the draw ratio is 1.5 to 4.0, which has properties such as a thickness of 120 to 300 ?m, a tensile elastic modulus of 80 to 500 MPa, a static friction coefficient of 0.3 to 0.8, a coefficient of shrinkage of 15% or more at 90° C. and 30% or more at 120° C., and which is foamed and has shrinkability.

Abstract: The present invention relates to a laminated member comprising a polyethylene resin composition layer having a very high adhesive strength to a substrate, and a method for manufacturing the same. The present invention is directed to a method for manufacturing the laminated member, which has a high adhesive strength to a different kind of substrate within a range from low to high temperature, and can reduce the resin temperature during the extrusion-lamination molding and inhibit any noxious influence on the working and surrounding environments, and is also superior in terms of high-speed mold ability at low temperature, and the laminated member. In the present invention, a compound having a specific structure is incorporated into a polyethylene resin composition layer. The present invention can be used to particular advantage in laminate products such as packaging material.

Abstract: The invention relates to a low-density polyethylene resin for laminates, a composition thereof, and a laminate and production method therefor. The low-density polyethylene resin is one obtainable by a high pressure radical polymerization method and has a density of 0.910 to 0.935 g/cm3, a melt flow rate of 0.1 to 300 g/10 min., and a terminal vinyl group number of 0.4 or more per 1,000 carbon atoms. According to the invention, a laminate having high interlayer adhesion strength can be obtained also by low-temperature, high-speed molding so that the occurrence of smoking and odor can be prevented. Also, the resin is excellent in productivity and economics. Further, the resin is excellent in productivity and economics because it can be readily made thinner. The laminate is suitable for application to, for example, food wrapping materials, containers, etc.

Abstract: A method and apparatus for molding an inflation film even from a thermoplastic resin having a small melt tension, in which a melt resin bubble extruded from an extruder is molded, while controlling a resin temperature of the bubble to a certain temperature range by an air ring provided with a plurality of annular slits for blowing cooling air in a take-up direction of the melt resin bubble and provided at a position at which the melt resin bubble is remarkably expanded, after (a) cooling air is blown to a melt resin bubble from a first air ring provided at the proximity of a die outlet to cool said melt resin bubble; and, then, the bubble is either (i) brought into contact, on the inner surface thereof, with the surface of a stabilizer provided on a die surface, or (ii) is supported in a non-contact state through an air layer, while being taken up.

Abstract: Foamed thin materials such as foamed film and foamed fibrillated materials produced by extruding a composition consisting of 100 parts by weight of aliphatic polyester having a melt viscosity of 1.0.times.10.sup.3 -1.0.times.10.sup.5 poises at a temperature of 190.degree. C. and a shear rate of 100 sec.sup.-1, and having a melting point of 70.degree.-200.degree. C., and 0.2-5 parts by weight of foaming agent. These foamed thin materials has biodegradability, excellent mechanical, insulating, touch and aesthetic properties. They are useful materials as insulating, packaging, oil absorbing materials and filters.

Abstract: An aliphatic polyester film which is synthesized from a glycol and an aliphatic polybasic acid having a melt viscosity of 2,000-100,000 poises at a temperature of 190.degree. C. and a shear rate of 100 sec.sup.-1, and having a melting point of 70.degree.-200.degree. C. The film is excellent in heat stability and mechanical strength as well as biodegradability when buried in the earth; and has low combustion heat than polyethylene and polypropyrene.

Abstract: Foamed thin materials such as foamed film and foamed fibrillated materials produced by extruding a composition consisting of 100 parts by weight of aliphatic polyester having a melt viscosity of 1.0.times.10.sup.3 -1.0.times.10.sup.5 poises at a temperature of 190.degree. C. and a shear rate of 100 sec.sup.-1, and having a melting point of 70.degree.-200.degree. C., and 0.2-5 parts by weight of foaming agent. These foamed thin materials has biodegradability, excellent mechanical, insulating, touch and aesthetic properties. They are useful materials as insulating, packaging, oil absorbing materials and filters.

Abstract: The present invention provides a low temperature heat shrinkable film comprising a linear low density polyethylene resin having a short branched chain and a density of 0.935 g/cm.sup.3, and whose film properties are such that the haze value is 5% or less, the heat shrinkages at 90.degree. C. in the M and T directions are 30% or more and 5% or less, respectively , and the shrinkage stress at 90.degree. C. in the M direction is 300 g/mm.sup.2 or more. This transparent film having an excellent low temperature heat shrinkability can be produced by drawing a film of the above-mentioned polyethylene resin between two rolls having a diameter of 200 mm or less at an air gap of 10 mm or less at a draw ratio of 3.0 to 6.0. Further, an inflation film having a multilayer structure can be obtained by press bonding or press bonding and drawing a plurality of films comprising the above-mentioned polyethylene resin. This laminate film has an excellent transparency and strength, and has a uniform film thickness.

Abstract: The present invention provides a low temperature heat shrinkable film comprising a linear low density polyethylene resin having a short branched chain and a density of 0.935 g/cm.sup.3, and whose film properties are such that the haze value is 5% or less, the heat shrinkages at 90.degree. C. in the M and T directions are 30% or more and 5% or less, respectively, and the shrinkage stress at 90.degree. C. in the M direction is 300 g/mm.sup.2 or more. This transparent film having an excellent low temperature heat shrinkability can be produced by drawing a film of the above-mentioned polyethylene resin between two rolls having a diameter of 200 mm or less at an air gap of 10 mm or less at a draw ratio of 3.0 to 6.0. Further, an inflation film having a multilayer structure can be obtained by press bonding or press bonding and drawing a plurality of films comprising the above-mentioned polyethylene resin. This laminate film has an excellent transparency and strength, and has a uniform film thickness.

Abstract: A low-temperature heat-shrinkable film having a haze value not larger than 8%, a heat shrinkability in the machine direction at a temperature of 90.degree. C. of at least 30%, and a shrinkage stress of at least 300 g/mm.sup.2, is made from a composition comprising (a) a linear ethylene polymer containing short-chain branches and having a density not larger than 0.940 g/cm.sup.2 and (b) an ethylene/propylene random copolymer containing 3.5 to 10% by weigh of units derived from ethylene, wherein the proportion of the ethylene/propylene random copolymer in the composition is 15 to 50% by weight.

Abstract: A 10 to 200 .mu.m thick film comprised of high density polyethylene having a density of 0.935 g/cm.sup.3 or more, the high density polyethylene type film having a film surface roughness of 0.001 to 0.15 .mu.m, a coefficient of C axis orientation of the cyrstals in the film (Fc) of 0.10 to 0.50, a difference .DELTA.n of the birefringence of the amorphous portions and crystalline portions in the film of 0.1000 to 0.1070, and a transparency of a haze of less than 10%. Such a film can be produced by passing an original material film through three heating rolls, designated as, for example, the first heating roll (hereinafter referred to as "R.sub.1 "), the second heating roll (hereinafter referred to as "R.sub.2 "), and the third heating roll (hereinafter referred to as "R.sub.3 "), in accordance with the order of the passage of the original material film, at a temperature of R.sub.2 higher than the temperatures of R.sub.1 and R.sub.3 and a temperature of R.sub.2 of 105.degree. C.

Abstract: The present invention provides a low temperature heat shrinkable film comprising a linear low density polyethylene resin having a short branched chain and a density of 0.935 g/cm.sup.3, and whose film properties are such that the haze value is 5% or less, the heat shrinkages at 90.degree. C. in the M and T directions are 30% or more and 5% or less, respectively, and the shrinkage stress at 90.degree. C. in the M direction is 300 g/mm.sup.2 or more. This transparent film having an excellent low temperature heat shrinkability can be produced by drawing a film of the above-mentioned polyethylene resin between two rolls having a diameter of 200 mm or less at an air gap of 10 mm or less at a draw ratio of 3.0 to 6.0. Further, an inflation film having a multilayer structure can be obtained by press bonding or press bonding and drawing a plurality of films comprising the above-mentioned polyethylene resin. This laminate film has an excellent transparency and strength, and has a uniform film thickness.

Abstract: A medical bag composed of a laminate comprising (i) an inner layer of a low-density polyethylene, an ethylene-1-olefin copolymer having a density of 0.920 g/cm.sup.3 or more, or a high density polyethylene, (ii) an intermediate layer of an ethylene-1-olefin copolymer having a density of 0.935 g/cm.sup.3 or less, and (iii) an outer layer of a low-density polyethylene, an ethylene-1-olefin copolymer having a density of 0.920 g/cm.sup.3 or more, or a high-density polyethylene.

Abstract: A heat resistant shrinkable film comprising a composition of (i) 50% to 90% by weight of an ethylene-propylene block copolymer with an ethylene content of 3% to 20% by weight and (ii) 50% to 10% by weight of an ethylene-propylene random copolymer with an ethylene content of 2 to 15% by weight and having a foam ratio of 3.0 or less.