Abstract: An ethylene-vinyl alcohol copolymer and a molded article thereof are disclosed. The ethylene-vinyl alcohol copolymer has improved stretching properties and provides the molded article with excellent gas barrier properties, appearance and strength. The ethylene-vinyl alcohol copolymer comprises the structural unit of formula (1): (wherein X represents any binding chain excluding an ether bond, each of R1 to R4 represents independently any substituent and n represents 0 or 1.).

Abstract: An ethylene-vinyl alcohol copolymer composition excellent in neck-in reduction, stretching properties and further, gas barrier properties and a multilayer structure using the same, are disclosed. The ethylene-vinyl alcohol copolymer composition of the present invention is the blend of two or more ethylene-vinyl alcohol copolymers and at least one of the copolymers has the following structural unit (1). (wherein X represents any binding chain excluding an ether bond, each of R1 to R4 represents independently any substituent and n represents 0 or 1). Preferably, the ethylene-vinyl alcohol copolymer having the structural unit (1) is obtained by hydrolyzing of a copolymer of 3,4-diacyloxy-1-butene, a vinyl ester monomer and ethylene.

Abstract: An object of the present invention is to provide a resin composition excellent in retort resistance at high temperature, gas barrier property, and anti-pinhole property as well as a multi-layer structure using the same. The invention relates to a resin composition comprising an ethylene-vinyl alcohol copolymer (A) and a polyamide-based resin (B), wherein the ethylene-vinyl alcohol copolymer (A) is an ethylene-vinyl alcohol copolymer comprising the following structural unit (1), preferably obtained by saponifying a copolymer of 3,4-diacetoxy-1-butene, a vinyl ester-based monomer, and ethylene: wherein X is a bonding chain which is an arbitrary bonding chain excluding an ether bond, R1 to R4 each independently represents an arbitrary substituent, and n represents 0 or 1.

Abstract: An object of the present invention is to provide a multi-layer film excellent in adhesiveness, appearance, transparency, and anti-pinhole property even at high-speed process as well as a multi-layer stretched film excellent in gas barrier property and anti-pinhole property. The invention relates to a multi-layer film which comprises a laminate of: a thermoplastic resin-containing layer; and a layer comprising an ethylene-vinyl alcohol copolymer comprising the following structural unit (1), wherein the thermoplastic resin-containing layer is provided on one side or both sides of the layer comprising an ethylene-vinyl alcohol copolymer, wherein X represents a bonding chain which is an arbitrary bonding chain excluding an ether bond, R1 to R4 each independently represents an arbitrary substituent, and n represents 0 or 1.

Abstract: The invention provides a fiber which is excellent in electrolyte absorption and retentivity and oxidation resistance and is suitable for use as a separator for alkaline secondary batteries. The invention is an ethylene/vinyl alcohol-derived copolymer fiber comprising an ethylene/vinyl alcohol-derived copolymer (A) having the following structural unit (1): (wherein R1 represents a hydrogen atom or an organic group; X represents a bonding chain other than ether bond; n represents 0 or 1; and R2 to R4 each represent a hydrogen atom or an organic group).

Abstract: An object of the present invention is to provide a resin composition in which generation of burned deposit and buildup occurring in a recycled layer is suppressed without adding a specific additive as well as a multi-layer structure using the same. The invention relates to a resin composition comprising an ethylene-vinyl alcohol copolymer (A) comprising the following structural unit (1) and at least one thermoplastic resin (B) selected from the group consisting of polyolefin and polystyrene as well as a multi-layer structure comprising the resin composition: wherein X represents a bonding chain which is an arbitrary bonding chain excluding an ether bond, R1 to R4 each independently represents an arbitrary substituent, and n represents 0 or 1.

Abstract: The present invention provides to an ethylene-vinyl alcohol copolymer composition excellent in neck-in reduction, stretching properties and further, gas barrier properties and a multilayer structure using the same. The ethylene-vinyl alcohol copolymer composition of the present invention is the blend of two or more ethylene-vinyl alcohol copolymers and at least one of the copolymers has the following structural unit (1). (wherein X represents any binding chain excluding an ether bond, each of R1 to R4 represents independently any substituent and n represents 0 or 1). Preferably, the ethylene-vinyl alcohol copolymer having the structural unit (1) is obtained by hydrolyzing of a copolymer of 3,4-diacyloxy-1-butene, a vinyl ester monomer and ethylene.

Abstract: An ethylene-vinyl alcohol copolymer and a molded article thereof are disclosed. The ethylene-vinyl alcohol copolymer has improved stretching properties and provides the molded article with excellent gas barrier properties, appearance and strength. The ethylene-vinyl alcohol copolymer comprises the structural unit of formula (1): (wherein X represents any binding chain excluding an ether bond, each of R1 to R4 represents independently any substituent and n represents 0 or 1.).

Abstract: A process for preparing a molded article of a hydrolyzed ethylene-vinyl acetate copolymer which includes separately melting each of a hydrolyzed ethylene-vinyl acetate copolymer and a polyolefin, admixing the melted copolymer with the melted polyolefin in a weight ratio of the hydrolyzed ethylene-vinyl acetate copolymer to the polyolefin of 30/70 to 70/30 and molding the mixture, according to which the molded article having improved flex-crack resistance, stretchability and thermoformability can be obtained with minimized deterioration of gas-impermeability.

Abstract: A resin composition including (A) a saponified ethylene-vinyl acetate copolymer having an ethylene content of 20 to 60 mole percent and a saponification degree of not less than 90 mole percent, (B) a polyolefin resin, (C) a carboxylic acid-modified polyolefin resin and (D) a lower fatty acid alkaline earth metal salt, characterized in:that the proportion of (A) relative to the total amount of (A) plus (B) plus (C) is 0.3 to 0.7 on the weight basis;that the composition contains the carbonyl group in an amount of 0.002 to 0.05 equivalent per 100 grams of the total of (B) plus (C); andthat the equivalent ratio between (D) and the carbonyl group in (C) is 0.5 to 5,and a method of producing the resin composition are provided.

Abstract: An improved saponified ethylene-vinyl acetate copolymer composition comprising(A) 50 to 99.5 weight % of a saponified ethylene-vinyl acetate copolymer,(B) 0.4 to 50 weight % of an ethylene copolymer having a density of 0.90.about.0.94 g/cm.sup.3, and(C) a graft polymer obtainable by grafting an ethylenically unsaturated carboxylic acid or a derivative thereof to a polyolefin resin and reacting the adduct with a polyamide oligomer or polyamide.

Abstract: An improved saponified ethylene-vinyl acetate copolymer composition comprising(A) 50 to 99.5 weight % of a saponified ethylene-vinyl acetate copolymer,(B) 0.4 to 50 weight % of an ethylene copolymer having a density of 0.90.about.0.94 g/cm.sup.3, and(C) a graft polymer obtainable by grafting an ethylenically unsaturated carboxylic acid or a derivative thereof to a polyolefin resin and reacting the adduct with a polyamide oligomer or polyamide.

Abstract: A saponified ethylene-vinyl acetate copolymer composition comprising(A) 50 to 99.5 weight % of a saponified ethylenevinyl acetate copolymer,(B) 0.4 to 50 weight % of a polyolefin resin, and(C) a graft polymer obtainable by grafting an ethylenically unsaturated carboxylic acid or a derivative thereof to a polyolefin resin and reacting the adduct with a polyamide oligomer or polyamide, which composition satisfies the relation: M.sub.2 /M.sub.1 =not less than 2 wherein M.sub.2 and M.sub.1 are the melt flow rates of (B) and (A), respectively, under a load of 2160 g at 210.degree. C.

Abstract: 1. A resin composition which comprises(A) a saponified ethylene-vinyl acetate copolymer,(B) a polyolefin resin,(C) a graft polymer obtained by grafting an ethylenically unsaturated carboxylic acid or a derivative thereof to a polyolefin resin and reacting the adduct with a polyamide oligomer or polyamide, and(D) a hydrotalcite solid solution representable by the general formula[(M.sup.2+).sub.y1 (M.sup.2+).sub.y2 ].sub.1-x M.sup.3+ (OH).sub.2 A.sub.x/n.mH.sub.2 Owherein M.sup.2+ represents at least one metal selected from among Mg, Ca, Sr and Ba, M.sup.2+ is a metal selected from among Zn, Cd, Pb and Sn, M.sup.3+ is a trivalent metal, A.sup.n- is an anion having a valence of n, and x, y1, y2 and m are respectively positive numbers satisfying the conditions 9<x.ltoreq.0.5, 0.5<y1<1, u1+y2=1, and 0.ltoreq.m<2.

Abstract: A resin composition which comprises(A) a saponified ethylene-vinyl acetate copolymer,(B) a polyolefin resin,(C) a graft polymer obtained by grafting an ethylenically unsaturated carboxylic acid or a derivative thereof to a polyolefin resin and reacting the adduct with a polyamide oligomer or polyamide, and(D) a hydrotalcite compound representable by the general formulaM.sub.X Al.sub.y (OH).sub.2x+3y-2z (E).sub.z.aH.sub.2 Owherein M is Mg, Ca or Zn, E is CO.sub.3 or HOP.sub.4, x, y and z each independently is a positive number and a is 0 (zero) or a positive number.

Abstract: A halogen-containing thermoplastic resin composition comprising a halogen-containing thermoplastic resin (A), a metallic soap (B) and an ash- and alkali metal-lean ethylene-vinyl acetate copolymer hydrolysate (C) having an ethylene content of 20 to 75 mole percent, a degree of saponification not less than 50 mole percent, an ash content not exceeding 300 ppm and an alkali metal content not exceeding 200 ppm, the proportions of (B) and (C) based on 100 parts of weight by (A) being 0.1 to 5 parts by weight and 0.1 to 5 parts by weight, respectively. The composition may further include, in addition to (A), (B), and (C) mentioned above, at least one compound (D) selected from the group consisting of .beta.-diketone compounds, organic phosphorous esters and aminocarboxylic acid compounds, the proportion of (D) based on 100 parts by weight of (A) being 0.

Abstract: A halogen-containing thermoplastic resin composition comprising a halogen-containing thermoplastic resin (A), a metallic soap (B) and an ash- and alkali metal-lean ethylene-vinyl acetate copolymer hydrolysate (C) having an ethylene content of 20 to 75 mole percent, a degree of saponification not less than 50 mole percent, an ash content not exceeding 300 ppm and an alkali metal content not exceeding 200 ppm, the proportions of (B) and (C) based on 100 parts of weight by (A) being 0.1 to 5 parts by weight and 0.1 to 5 parts by weight, respectively. The composition may further include, in addition to (A), (B) and (C) mentioned above, at least one compound (D) selected from the group consisting of .beta.-diketone compounds, organic phosphorous esters and aminocarboxylic acid compounds, the proportion of (D) based on 100 parts by weight of (A) being 0.

Abstract: A resin composition comprising(A) 100 parts by weight of a hydrolyzed eithylene-vinyl acetate copolymer,(B) 1 to 100 parts by weight of a polyester resin and(C) 0.1 to 50 parts by weight of a polyester-amide resin The composition is excellent in impact strength and flex crack resistance.

Abstract: In a process for preparing a molded article by melt-molding a mixture of (A) a hydrolyzed ethylene-vinyl acetate copolymer having an ethylene content of 20 to 80% by mole and a degree of hydrolysis in the vinyl acetate units of at least 90% by mole and (B) an olefin resin, the improvement which comprises melt-molding said mixture in the presence of a hydrotalcite solid solution (C) having the formula (I):{(M.sub.1.sup.2+).sub.yl (M.sub.2.sup.2+).sub.y2 }.sub.1-x (M.sup.3+).sub.x (OH).sub.2 (A.sup.n-).sub.x/n.mH.sub.2 O (I)According to the process of the present invention, long run processability during melt-molding can be remarkably improved, and the obtained molded article has excellent qualities, e.g., the film has few fish eyes.

Abstract: A composition comprising(1) a hydrolyzed ethylene-vinyl acetate copolymer having an ethylene content of 20 to 60% by mole and a degree of hydrolysis in the vinyl acetate component of at least 95% by mole and(2) a secondary or tertiary alkali metal phosphate; the alkali metal content being from 15 to 250 ppm of the hydrolyzed copolymer (1) and the phosphorus content being from 5 to 70 ppm of the hydrolyzed copolymer (1). The composition of the invention is excellent in adhesive strength to unsaturated carboxylic acid-modified polyolefins, and therefore the laminate having the structure the polyolefin layer/the unsaturated carboxylic acid-modified polyolefin layer/the hydrolyzed ethylene-vinyl acetate copolymer composition of the invention layer has excellent adhesive strength between the unsaturated carboxylic acid-modified polyolefin layer and the layer of the composition of the present invention.