Sumitomo Chemical Company, Limited

Okura Industrial Co., Ltd.

Kura Industrial Company, Limited

Haruo Hayashida

Akihiro Ichige

Takeshi Yamada

Kazuo Kondo

Nobuo Fukushima

Teruo Tada

Eisuke Shiratani

Toyoki Wano

Satoru Koyama

Kouichi Yanase

Masaaki Zenigame

Kozo Kotani

Shuji Kitamura

Toshio Kawakita

Kiyohiko Nakae

Teruo Saito

Tadatoshi Ogawa

Takanori Kume

Takuzo Okumura

Kazuo Hieda

Teruaki Yoshida

Yukikazu Uemura

Hiroaki Takahata

Yuji Gotoh

Yufu Sato

Kouji Kubo

Seiichi Shibata

Kohji Kubo

Fumio Ishibashi

Ryouichi Nomura

Ikuo Yamamoto

Ryoichi Nomura

Kazuo Kasabo

Teruo Saitou

There is provided a self-tack wrapping film comprising a non-oriented multi-layer film of a chlorine-free resin, which is regulated in (a) tensile breaking elongation at a longitudinal direction, (b) ratio of a tensile breaking elongation at a transverse direction to the tensile breaking elongation at a longitudinal direction, (c) tensile breaking load at a longitudinal direction (LLD), (d) ratio of the tensile breaking load at a longitudinal direction to a tensile breaking load at a transverse direction, (e) tensile modulus at a longitudinal direction and that at a transverse direction, (f) tackiness, (g) heat resistant temperature and (h) respective thermal shrinkage percents at longitudinal and transverse directions, to a predetermined range, which wrapping film has improved tackiness, heat resistance, microwave oven suitability and 'saw blade' cutting characteristics, and appropriate flexibility.

Multi-layer self-tack wrapping film

A film containing a first layer containing a propylene-based block copolymer (a) obtainable by forming 40 to 85% by weight of a propylene-ethylene copolymer portion (A) having a content of repeating unit derived from ethylene of 1.5 to 6.0% by weight in a first step, and then forming 15 to 60% by weight of a propylene-ethylene copolymer portion (B) having a content of repeating unit derived from ethylene of 7 to 17% by weight in a second step, the intrinsic viscosity of portion (B) being 2 to 5 dl/g, and the ratio of the intrinsic viscosity of portion (B) to the intrinsic viscosity of portion (A) being 0.5 to 1.8, and a second layer containing a polyethylene type resin (b) laminated on at least one surface of the first layer, has a good balance between heat resistance, flexibility, mechanical strength, transparency, cuttability, original-shape resuming property and other desirable properties, and is suitably used for wrapping materials such as foods.

Multi-layer stretch wrapping film

A process for producing an extrusion laminated film or sheet comprising a plastic substrate and a resin for extrusion laminating selected from the group consisting of polyethylene resins, polypropylene resins, ethylene-vinylester copolymer resins and ethylene-(metha)acrylate copolymer resins, comprising (A) a surface oxidizing step, (B) an ozone-treating step and (C) a pressurized laminating step as specified using no chemical primer.

Process for producing laminated film and laminated sheet

A laminated film useful for packaging includes two outer layers and a core layer of a polypropylene resin interposed therebetween. Each of the outer layers includes (A) an ethylene-.alpha.-olefin copolymer having a density of less than 0.910 g/cm.sup.3 but not less than 0.870 g/cm.sup.3 and an ethylene content of at least 50 mol % and showing only one endothermic peak when analyzed by differential scanning calorimetry (DSC), (B) an ethylene-.alpha.-olefin copolymer having a density of 0.910-0.935 g/cm.sup.3 and an ethylene content of at least 50 mol %, and (C) an anti-fogging agent. The density of (B) is greater by at least 0.008 g/cm.sup.3 than that of (A).

Multilayer packaging film

A self-tacky packaging film which comprises a multi-layer film comprising:

Self-tacky packaging film

A wrapping multilayer film comprising at least 5 layers of (A) both the outermost layers each comprising an ethylene-.alpha.-olefin copolymer having an ethylene content of at least 50 mol %, (B) layers each comprising a propylene polymer and being disposed between the outermost layers (A), and (C) a layer comprising recycled resins and being disposed between the layers (B).

Wrapping multilayer film

A laminate film for wrapping which comprises a layer comprising (A) an ethylene-.alpha.-olefin copolymer having a coefficient of variation of composition distribution (Cx) represented by equation shown below of 0.40 or less and having an ethylene content of 50 mol % or more and at least one layer of a different kind;

Laminate film for wrapping

A polyolefin resin composition for a film which consists essentially of a mixture of 100 parts by weight of a polyolefin resin with (a) 0.01-3.0 parts by weight of an antiblocking agent, the surface OH group content of which is 200 .mu.mol/g or less. The resin composition may further contain (b) 0.05-2.0 parts by weight of an antistatic agent consisting of (A) a glycerine fatty acid ester and (B) an alkyldiethanolamide in a weight ratio of A/B of 50/50-95/5 for antistatic film or (c) 0.05-3.0 parts by weight of at least one member selected from the group consisting of polyhydric alcohol fatty acid esters, alkylene oxide adducts of polyhydric alcohol fatty acid esters and higher alcohol-alkylene oxide adducts as an antifogging agent, or (d) 0.01-3.0 parts by weight of a phenol type antioxidant and (e) 0.01-0.2 part by weight of a phosphorous type antioxidant for forming a stabilized film.

Polyolefin resin composition

A silk-like polyethylene plastic film is disclosed, comprising an extrusion molded film of a mixture of (A) an ethylene/methacrylate copolymer having a methacrylate content of from 10 to 40 weight % and an MFR of from 0.5 to 40 g/10 min. with (B) polyethylene having an MFR of from 0.02 to 5.0 g/10 min., said mixture having amethacrylate content of from 7 to 25 weight % and an MFR ratio of the component (A) to the component (B) of from 0.05 to 120. This silk-like film has no reflective gloss, opacity, soft and smooth touch, and which sounds low when it is crumpled. Thus it is preferably used as throwaway rainwears, medical sheets, etc.

Silk-like film

An aromatic polysulfone resin composition comprising 20 to 80% by weight of an aromatic polysulfone, 10 to 70% by weight of wallastonite and 0.5 to 20% by weight of a fluororesin. The aromatic polysulfone resin composition is superior in heat resistance, strength, stiffness, flame resistance, processability, etc. as engineering plastics.

Aromatic polysulfone resin composition

The present invention provides an oxide sol hardened by the irradiation of actinic rays such as UV ray, electron ray, .gamma. ray, X ray etc., by heating or by using a catalyst. Said oxide sol comprises not less than 20% by weight of an oxide such as SiO.sub.2, Al.sub.2 O.sub.3 or the like in a dispersion medium containing at least 80% by mole of a reactive monomer such as acrylic acid, its esters, .alpha.-substituted acrylic acid esters, etc. These oxide sols have a good coating property and stable compatibility with organic solvents and are useful as modifiers for resins, binders for ceramics, thickening agents for cosmetics, coating agents for paper, antistatic agents for fabrics.

Oxide sol using reactive monomer as dispersion medium

A method for the orientation of a thermoplastic polyether ether ketone film or sheet is described, which comprises rolling the thermoplastic polyether ether ketone film or sheet containing therein a repeating unit represented by the formula: ##STR1## singly or in combination with one or more different repeating units at a linear pressure of at least 100 kg/cm by the use of at least one pair of pressure rolls maintained within a temperature range of from 80.degree. C. to 320.degree. C. while applying a backward tension of at least 80 kg/cm.sup.2.

Method for the orientation of thermoplastic polyether ether ketone films

A method for producing a high-strength film of amorphous aromatic high polymers comprising rolling said polymer between rolls, and stretching the rolled film of said polymer.

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Chiba, Japan

Haruo Hayashida