Patents Assigned to Du Pont-Mitsui Polychemicals Co., Ltd.
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Patent number: 9353230Abstract: A resin pellet of the present invention includes a resin base material and a plurality of microparticles embedded in the resin base material. The resin pellet is covered with the plurality of microparticles on the surface of the resin base material. According to the present invention, it is possible to prevent detachment of the microparticles to be applied on the resin base material and to effectively suppress blocking of resin pellets.Type: GrantFiled: January 10, 2014Date of Patent: May 31, 2016Assignee: Du Pont-Mitsui Polychemicals Co., Ltd.Inventors: Kazuyuki Chiba, Izumi Sasai
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Patent number: 9120920Abstract: Provided is a polymer composition including (A) an ionomer containing an ethylene/?,?-unsaturated carboxylic acid copolymer and an ethylene/?,?-unsaturated carboxylic acid/?,?-unsaturated carboxylic acid ester terpolymer, and (B) a propylene-based polymer, wherein the mass of constituent units derived from the ?,?-unsaturated carboxylic acid ester is from 1 to 4.5% by mass of the entire mass of the ionomer. Through this, a high seal strength may be obtained in a high-temperature range when forming a lock seal, while a high seal strength, as compared with the related art, can be stably obtained over a wide temperature range with a temperature dependence suppressed when forming a peelable seal.Type: GrantFiled: May 27, 2009Date of Patent: September 1, 2015Assignee: Du Pont-Mitsui Polychemicals Co., Ltd.Inventors: Shigenori Nakano, Kaoru Suzuki, Toshihisa Toyoda
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Patent number: 8969468Abstract: The invention is a methacrylic resin composition which includes a methacrylic resin (A) and a saponified polymer (B) that is an alkaline-saponified product of an ethylene-unsaturated carboxylic acid ester copolymer, and the methacrylic resin composition has a concentration of alkali ions of from 0.03 mol/kg to 2.8 mol/kg.Type: GrantFiled: May 23, 2012Date of Patent: March 3, 2015Assignee: Du Pont-Mitsui Polychemicals Co., Ltd.Inventors: Masataka Aoyama, Toshiyuki Ishii, Youichi Shinya, Kenichi Date
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Patent number: 8957304Abstract: A sheet for solar cell encapsulant including (A) an ethylene copolymer selected from 1a to 5a; and (B) an ethylene copolymer selected from 1b to 3b, the copolymer (A) having a melting point of 90° C. or higher and containing constituent unit derived from ethylene [1a: ethylene-vinyl acetate (VA) copolymer, 2a: ethylene-acrylate copolymer, 3a: high-pressure method low-density polyethylene, 4a: ethylene-?-olefin copolymer, 5a: ethylene-G(M)A copolymer other than the below-described 1b, 1b: ethylene-G(M)A copolymer, 2b: ethylene-VA-G(M)A copolymer, 3b: ethylene-acrylate-G(M)A copolymer]. In the ethylene copolymer (B), the total ratio of the constituent unit derived from glycidyl(meth)acrylate (G(M)A) is preferably from 2% to 30% by mass. As a result of this, crosslinking treatment is substantially unnecessary, and practical adhesion and adhesion stability are achieved without heat treatment for crosslinking.Type: GrantFiled: May 13, 2010Date of Patent: February 17, 2015Assignee: Du Pont-Mitsui Polychemicals Co., Ltd.Inventors: Masanobu Sato, Kazuyuki Oogi
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Patent number: 8921488Abstract: The present invention provides a resin composition for extrusion coating, the composition including (1) at least one of a copolymer of ethylene and ?,?-unsaturated carboxylic acid or an ionomer thereof and (2) a homopolypropylene, wherein a content of the component (2) is 3 to 12% by mass based on the total mass of the component (1) and the component (2) and has a melt flow rate (at a load of 2160 g and 190° C., JIS K7210) of 4.0 g/10 min. or more.Type: GrantFiled: December 14, 2011Date of Patent: December 30, 2014Assignee: Du Pont-Mitsui Polychemicals Co., Ltd.Inventors: Shigenori Nakano, Kaoru Suzuki
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Patent number: 8791208Abstract: Provided is a sheet for a solar cell encapsulant containing (A) an ethylene-based polymer having a melting point of 90° C. or higher and containing an ethylene-derived constituent unit as a main component; (B) an ethylene-vinyl acetate copolymer having a vinyl acetate-derived constituent unit at a content ratio of from 19% to 40% by mass; and (C) a silane coupling agent having an amino group. The sheet for solar cell encapsulant has the excellent transparency and flexibility possessed by an ethylene-vinyl acetate copolymer. Furthermore, a crosslinking treatment is substantially unnecessary, and adhesiveness and adhesion stability that are appropriate for practical use are obtained.Type: GrantFiled: February 15, 2010Date of Patent: July 29, 2014Assignee: Du Pont-Mitsui Polychemicals Co., Ltd.Inventors: Koichi Nishijima, Yasuki Shibata, Koji Kawano
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Publication number: 20140127403Abstract: A resin pellet of the present invention includes a resin base material and a plurality of microparticles embedded in the resin base material. The resin pellet is covered with the plurality of microparticles on the surface of the resin base material. According to the present invention, it is possible to prevent detachment of the microparticles to be applied on the resin base material and to effectively suppress blocking of resin pellets.Type: ApplicationFiled: January 10, 2014Publication date: May 8, 2014Applicant: Du Pont-Mitsui Polychemicals Co., Ltd.Inventors: Kazuyuki Chiba, Izumi Sasai
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Patent number: 8716405Abstract: The present invention provides a resin composition including (1) at least one selected from the group consisting of ethylene-?,?-unsaturated carboxylic acid copolymers and ionomers thereof, which have a melt flow rate of from 0.5 g/10 min to 6 g/10 min, (2) at least one selected from the group consisting of ethylene-?,?-unsaturated carboxylic acid copolymers and ionomers thereof, which have a melt flow rate of from 10 g/10 min to 30 g/10 min, and (3) at least one selected from the group consisting of propylene homopolymers and copolymers obtained by copolymerization using propylene and one or more ?-olefins excluding propylene, in which a structural unit derived from an ?,?-unsaturated carboxylic acid ester is substantially not contained in the total amount of the ethylene-?,?-unsaturated carboxylic acid copolymers and the ionomers thereof.Type: GrantFiled: May 27, 2011Date of Patent: May 6, 2014Assignee: Du Pont-Mitsui Polychemicals Co. Ltd.Inventors: Shigenori Nakano, Kaoru Suzuki
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Publication number: 20140100322Abstract: The invention is a methacrylic resin composition which includes a methacrylic resin (A) and a saponified polymer (B) that is an alkaline-saponified product of an ethylene-unsaturated carboxylic acid ester copolymer, and the methacrylic resin composition has a concentration of alkali ions of from 0.03 mol/kg to 2.8 mol/kg.Type: ApplicationFiled: May 23, 2012Publication date: April 10, 2014Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.Inventors: Masataka Aoyama, Toshiyuki Ishii, Youichi Shinya, Kenichi Date
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Publication number: 20130337279Abstract: The present invention provides a resin composition for extrusion coating, the composition including (1) at least one of a copolymer of ethylene and ?,?-unsaturated carboxylic acid or an ionomer thereof and (2) a homopolypropylene, wherein a content of the component (2) is 3 to 12% by mass based on the total mass of the component (1) and the component (2) and has a melt flow rate (at a load of 2160 g and 190° C., JIS K7210) of 4.0 g/10 min, or more.Type: ApplicationFiled: December 14, 2011Publication date: December 19, 2013Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.Inventors: Shigenori Nakano, Kaoru Suzuki
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Publication number: 20130330548Abstract: An adhesive film or sheet of the present invention includes an adhesive layer containing an ethylene-alkyl (meth)acrylate copolymer (A). The ethylene-alkyl (meth)acrylate copolymer (A) is a random binary copolymer of ethylene and alkyl(meth)acrylate, carbon atoms of an alkyl group of the alkyl(meth)acrylate are 2 or more, and a melting point T[° C.] measured based on JIS K7121-1987 and unit content X [mol %] of the alkyl (meth)acrylate satisfy the following Expression (1). ?3.0X+125?T??3.0X+107??(1) (Herein, the adhesive layer does not contain a high-crystalline ethylene-based or propylene-based copolymer having a melting temperature of equal to or higher than 115° C.Type: ApplicationFiled: February 20, 2012Publication date: December 12, 2013Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.Inventors: Masataka Aoyama, Koichiro Yamamoto, Yoshitaka Hironaka, Atsushi Morimoto, Chikara Ichinoseki
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Publication number: 20130313217Abstract: A resin container (100) includes: a hollow molded body (10) which has a mouth-neck portion (20) and a tubular main body portion (12) with a bottom and is made of a first resin material such as polyolefin; and a resin sheathing body (30) which is made of a second resin material such as polyester and in which the main body portion (12) is buried in an unfixed manner. A frost-treated portion (122) subjected to a frost treatment is formed on at least a part of the main body portion (12).Type: ApplicationFiled: February 22, 2012Publication date: November 28, 2013Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.Inventors: Sadaki Yamamoto, Motoaki Isokawa, Toshihiro Ito
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Patent number: 8569437Abstract: A solar cell encapsulated with an encapsulating material which is a non-crystalline or low-crystalline ?-olefin-based copolymer or its composition (I). The composition (C) can contain 50 to 100 parts by weight of non-crystalline ?-olefin polymer (A) which meets the following requirements: (a) the ?-olefin having 3 to 20 carbon atoms is not less than 20 mol %, (b) practically no melt peak as measured by a differential scanning calorimeter is observed, and (c) the Mw/Mn is not more than 5, and 50 to 0 parts by weight of crystalline ?-olefin polymer (B) (the total of (A) and (B) being 100 parts by weight). The non-crystalline or low-crystalline ?-olefin copolymer may also have a crystallinity of not higher than 40% as measured by use of X rays.Type: GrantFiled: January 2, 2013Date of Patent: October 29, 2013Assignees: Du Pont-Mitsui Polychemicals, Co., Ltd., Mitsui Chemicals Tohcello, Inc.Inventors: Koichi Nishijima, Akira Yamashita
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Patent number: 8551385Abstract: A resin molding apparatus of a simplified structure is provided that offers high handling efficiency by a work robot, thereby improving a throughput. The resin molding apparatus (200) that retains a hollow molded body (10) including a closed-bottom cylindrical main body (12) and a cylindrical open neck portion (20), the open neck portion (20) including a helical ridge portion (22) formed on an outer circumferential surface thereof and divided into a plurality of helical segments by a slit (24) extending in an axial direction of the open neck portion (20), and that overmolds a resin sheathing body (30) on an outer surface of the main body (12), includes a first recess in which the open neck portion (20) is to be fitted, and a rib (216) formed on a circumferential surface of the recess so as to extend in a depthwise direction thereof, and to be engaged with the slit (24).Type: GrantFiled: July 21, 2009Date of Patent: October 8, 2013Assignee: Du Pont-Mitsui Polychemicals Co., Ltd.Inventors: Kazuyuki Oogi, Sadaki Yamamoto, Masanobu Sato
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Patent number: 8517197Abstract: A synthetic resin hollow body (A) that has a satisfactory decorating property and a satisfactory recycle property in a disposal and that is hardly damaged. In addition, a product cost and an operation cost thereof can be suppressed. The synthetic resin hollow body (A) includes: a hollow molding body (a) made of a resin, the hollow molding body (a) capable of holding a liquid material; and a resin sheathing body formed outside the hollow molding body (a) in an integrating manner with the hollow molding body (a), wherein the resin sheathing body is made of a highly transparent synthetic resin having a total ray transmittance of at least 80%.Type: GrantFiled: December 13, 2011Date of Patent: August 27, 2013Assignee: Du Pont-Mitsui Polychemicals Co., Ltd.Inventors: Sadaki Yamamoto, Kazuyuki Oogi, Masanobu Sato
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Patent number: 8513357Abstract: An ethylene copolymer composition which includes a zinc ionomer containing, as a main component, a copolymer having a constituent unit derived from ethylene and a constituent unit derived from (meth)acrylic acid, and a dialkoxysilane having an amino group, is provided. This makes it possible to increase the stability during sheet production. It is preferable that the content ratio of the dialkoxysilane is 15 parts by mass or less based on 100 parts by mass of the zinc ionomer.Type: GrantFiled: June 16, 2009Date of Patent: August 20, 2013Assignee: Du Pont-Mitsui Polychemicals Co., Ltd.Inventor: Koichi Nishijima
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Patent number: 8497321Abstract: A tacky resin composition which has proper initial tackiness, is sufficiently inhibited from rising in tackiness with time, can keep tackiness at a proper range even when it receives a slight heat history or is stored for a long time, has very small dependence on peeling speed, and can provide high transparency to a pressure-sensitive adhesive film or sheet as required, and a pressure-sensitive adhesive film or sheet for the surface protection of an article, which is obtained form the tacky resin composition. The tacky resin composition comprises (A) 5 to 80 parts by weight of an olefin polymer (component A), (B) 5 to 80 parts by weight of an ethylene/unsaturated ester copolymer (component B) and (C) 1 to 60 parts by weight of a styrene-based elastomer and/or an olefin-based elastomer (component C) based on 100 parts by weight of the total of the components A, B and C.Type: GrantFiled: January 28, 2009Date of Patent: July 30, 2013Assignee: Du Pont-Mitsui Polychemicals Co., Ltd.Inventors: Masataka Aoyama, Yoshitaka Hironaka, Hisao Gonohe
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Publication number: 20130125986Abstract: A solar cell encapsulated with an encapsulating material which is a non-crystalline or low-crystalline ?-olefin-based copolymer or its composition (I). The composition (C) can contain 50 to 100 parts by weight of non-crystalline ?-olefin polymer (A) which meets the following requirements: (a) the ?-olefin having 3 to 20 carbon atoms is not less than 20 mol %, (b) practically no melt peak as measured by a differential scanning calorimeter is observed, and (c) the Mw/Mn is not more than 5, and 50 to 0 parts by weight of crystalline ?-olefin polymer (B) (the total of (A) and (B) being 100 parts by weight). The non-crystalline or low-crystalline ?-olefin copolymer may also have a crystallinity of not higher than 40% as measured by use of X rays.Type: ApplicationFiled: January 2, 2013Publication date: May 23, 2013Applicants: Mitsui Chemicals Tohcello, Inc., Du Pont-Mitsui Polychemicals Co., Ltd.Inventors: Du Pont-Mitsui Polychemicals Co., Ltd., Mitsui Chemicals Tohcello, Inc.
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Publication number: 20130114917Abstract: The invention is a filling method in which liquid is filled and sealed into a liquid sachet package made of a multilayered laminate having at least three layers in which a base material which forms a surface layer, an intermediate layer, and a sealant layer which forms an internal layer are laminated in the above order, including a process of forming a liquid sachet package, a process of filling liquid, and a process of sealing in the opening of the liquid sachet package, in which the intermediate layer is formed using a composition including an ionomer of an ethylene and unsaturated carboxylic acid copolymer, and a filling temperature range obtained using a specific method becomes equal to or more than 30° C. at both a line speed of 20 m/minute and a line speed of 25 m/minute.Type: ApplicationFiled: July 12, 2011Publication date: May 9, 2013Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.Inventors: Yuu Sakamoto, Noritsugu Saito, Nobuyuki Maki
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Publication number: 20130102105Abstract: The present invention provides a production method of a solar cell module, comprising: a first process of mounting a module layered body, which comprises at least a glass member, an encapsulant, a solar cell element and a translucent member in this order, and in which an outer periphery of the encapsulant is positioned at an inner side of outer peripheries of the glass member and the translucent member, on a mounting platen of a double vacuum chamber system laminator comprising a first chamber and a second chamber that are partitioned by a flexible member, and the mounting platen, which is provided in the second chamber facing the flexible member and comprises a heating means, the module layered body being mounted on the mounting platen so that the glass member is at the flexible member side; a second process of depressurizing the inside of the first chamber and the inside of the second chamber; and a third process of heat-pressure bonding and integrating the module layered body by raising a pressure in the fType: ApplicationFiled: July 8, 2011Publication date: April 25, 2013Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.Inventors: Kazuyuki Nakata, Kazuyuki Oogi, Yui Endo