Patents Assigned to Du Pont-Mitsui Polychemicals Co., Ltd.
  • Publication number: 20110220728
    Abstract: Disclosed is a protective film for an electronic component comprising a base material containing a heat resistant resin and an adhesive layer formed on the base material containing an ethylene-unsaturated carboxylic acid copolymer or a metal salt thereof, wherein the ethylene-unsaturated carboxylic acid copolymer or the metal salt thereof contains 3 to 30% by weight of the structural unit derived from an unsaturated carboxylic acid.
    Type: Application
    Filed: November 20, 2009
    Publication date: September 15, 2011
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.
    Inventors: Nobuyuki Maki, Hidenori Hashimoto
  • Publication number: 20110214699
    Abstract: Disclosed is a method for producing a resin film or a resin sheet comprising a step of cleaning resin pellets and a step of forming the resin film or the resin sheet by using the cleaned resin pellets. The step of cleaning the resin pellets comprises a step of introducing the resin pellets and water into a first tube body, and a step of conveying the resin pellets and the water toward a discharge opening in the first tube body, and cleaning the resin pellets by removing foreign matters from the surfaces of the resin pellets by water flow.
    Type: Application
    Filed: October 30, 2009
    Publication date: September 8, 2011
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.
    Inventor: Izumi Sasai
  • Publication number: 20110210481
    Abstract: A manufacturing method of a synthetic resin hollow body in which a molten resin is injected for an over-molding outside a hollow molding body made of a resin provided with a hollow body and at least an opening portion to form a resin sheathing body in an integrating manner with the hollow molding body. The method includes the step of injecting the molten resin for an over-molding under the state in which the hollow molding body is partially or wholly filled with a fluid substance. The manufacturing method of a synthetic resin hollow body is capable of suppressing resin cost and operation cost and can improve decorating property.
    Type: Application
    Filed: May 12, 2011
    Publication date: September 1, 2011
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.
    Inventors: Sadaki YAMAMOTO, Kazuyuki Oogi, Masanobu Sato
  • Patent number: 7988897
    Abstract: A manufacturing method of a synthetic resin hollow body in which a molten resin is injected for an over-molding outside a hollow molding body made of a resin provided with a hollow body and at least an opening portion to form a resin sheathing body in an integrating manner with the hollow molding body. The method includes the step of injecting the molten resin for an over-molding under the state in which the hollow molding body is partially or wholly filled with a fluid substance. The manufacturing method of a synthetic resin hollow body is capable of suppressing resin cost and operation cost and can improve decorating property.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: August 2, 2011
    Assignee: Du Pont-Mitsui Polychemicals Co., Ltd.
    Inventors: Sadaki Yamamoto, Kazuyuki Oogi, Masanobu Sato
  • Publication number: 20110130519
    Abstract: Provided is a styrene-based resin-containing composition including (A) a polymer saponified product which is obtained by saponifying an ethylene-unsaturated carboxylic acid ester copolymer with potassium and has a potassium ion concentration in the range of 0.1 to 5.8 mol/kg, in an amount of 2 parts by mass or more and less than 100 parts by mass, and (B) a styrene-based resin, in an amount of more than 0 parts by mass and 98 parts by mass or less, the composition having a potassium ion concentration of 0.002 to 5.8 mol/kg.
    Type: Application
    Filed: July 31, 2009
    Publication date: June 2, 2011
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.
    Inventors: Youichi Shinya, Kenichi Date, Toshiyuki Ishii, Toru Fukada
  • Publication number: 20110114653
    Abstract: 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: Application
    Filed: July 21, 2009
    Publication date: May 19, 2011
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.
    Inventors: Kazuyuki Oogi, Sadaki Yamamoto, Masanobu Sato
  • Publication number: 20110108094
    Abstract: Provided is a laminated sheet for solar cell having a back sheet base material including a fluoro-resin or a polyester resin, and a sealing material layer which includes an ethylene copolymer composition containing a copolymer of an ethylene and a polar monomer which has a polar group selected from a group consist of a carboxylic acid group and a group derived from a carboxylate and a dialkoxysilane having an amino group is laminated on a surface of the back sheet base material where a chemical treatment or a physical treatment for improving adhesiveness has been applied, by a melt extrusion lamination method. Thereby, a laminated sheet having excellent productivity and excellent interlayer adhesion strength between the back sheet and the sealing material is obtained.
    Type: Application
    Filed: June 26, 2009
    Publication date: May 12, 2011
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.
    Inventors: Koichi Nishijima, Yasuki Shibata, Masanobu Sato
  • Publication number: 20110105681
    Abstract: 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: Application
    Filed: June 16, 2009
    Publication date: May 5, 2011
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.
    Inventor: Koichi Nishijima
  • Publication number: 20110071259
    Abstract: 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: Application
    Filed: May 27, 2009
    Publication date: March 24, 2011
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.
    Inventors: Shigenori Nakano, Kaoru Suzuki, Toshihisa Toyoda
  • Publication number: 20110061735
    Abstract: The present invention provides a crosslinkable ethylene copolymer composition which is superior in transparency, heat resistance, adhesive property, flexibility, moldability, durability, and the like, as well as in insulating property, and which shows less decrease in adhesive property with time and can maintain the adhesive property for a long period, and a crosslinkable sheet composed of said composition, and an encapsulating sheet for solar cell and a solar cell module. More in detail, the present invention relates to a crosslinkable ethylene copolymer composition comprising a dialkoxysilane having a double bond in a ratio of 3 parts by weight or less to 100 parts by weight of ethylene copolymer, and a crosslinked sheet of said composition, and further to an encapsulating sheet for solar cell composed of said composition and a solar cell module using the sheet.
    Type: Application
    Filed: May 12, 2008
    Publication date: March 17, 2011
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.
    Inventor: Koichi Nishijima
  • Publication number: 20110034633
    Abstract: A process for manufacturing a thermoplastic resin composition including 73 to 95.5 parts by weight of (A) an ionomer wherein 20 to 90% of carboxyl group of ethylene/(meth)acrylic acid copolymer is neutralized by metal ion; 0.5 to 7 parts by weight of (B) a copolymer of ethylene or ?-olefin, containing glycidyl (meth)acrylate or unsaturated glycidyl ether, optionally further containing vinyl ester or unsaturated carboxylic acid ester; and 4 to 20 parts by weight of (C) propylene/?-olefin copolymer, the process including melt-blending the ionomer (A) with melt-blended mixture of (B) the copolymer of ethylene or ?-olefin, containing glycidyl (meth)acrylate or glycidyl unsaturated ether, or optionally further containing vinyl ester or unsaturated carboxylic acid ester and (C) the propylene/?-olefin copolymer.
    Type: Application
    Filed: October 5, 2010
    Publication date: February 10, 2011
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.
    Inventors: Shigenori Nakano, Nobuyuki Maki, Chikara Ichinoseki
  • Publication number: 20100313956
    Abstract: 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: Application
    Filed: August 23, 2010
    Publication date: December 16, 2010
    Applicants: Du Pont-Mitsui Polychemicals Co., Ltd., Mitsui Chemicals Fabro, Inc.
    Inventors: Koichi NISHIJIMA, Akira Yamashita
  • Publication number: 20100317802
    Abstract: 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: Application
    Filed: January 28, 2009
    Publication date: December 16, 2010
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.
    Inventors: Masataka Aoyama, Yoshitaka Hironaka, Hisao Gonohe
  • Publication number: 20100252477
    Abstract: [Problem] It is an object to provide a composite container in which a shape and a profile of a resin hollow molding body can be discriminated with clarity in the case in which a visual contact is carried out to the inside resin hollow molding body via an outside transparent resin sheathing body, whereby a design property can be displayed to a satisfactory extent, and in which a design property can be displayed to a satisfactory extent even by a combination of the resin hollow molding body and the outside transparent resin sheathing body.
    Type: Application
    Filed: November 11, 2008
    Publication date: October 7, 2010
    Applicant: Du Pont-Mitsui Polychemicals Co., Ltd.
    Inventors: Sadaki Yamamoto, Kazuyuki Oogi, Masanobu Sato
  • Publication number: 20100255302
    Abstract: [Problem] To provide an adhesive film or sheet for protecting the surfaces of articles having proper initial adhesive force, sufficiently suppressing an increase in the adhesive force after aged, maintaining a suitable adhesive force in a proper range despite of being subjected to thermal hysteresis to some extent or even after preserved for extended periods of time and, as desired, being capable of imparting a high degree of transparency to the adhesive film or sheet. [Means for Solution] An adhesive film or sheet comprising a mixed resin of an ethylene/unsaturated ester copolymer resin (A) and a highly crystalline ethylene or propylene polymer or copolymer resin (B) having a melting point of not lower than 115° C.
    Type: Application
    Filed: October 29, 2008
    Publication date: October 7, 2010
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD
    Inventors: Masataka Aoyama, Yoshitaka Hironaka, Hisao Gonohe
  • Publication number: 20100247939
    Abstract: [Problem] It is an object to provide an unstretched film and a sheet that are excellent in an antistatic property and transparency, a resin composition that is used in producing the unstretched film or the sheet and a potassium ionomer that is contained in the composition. [Means for Solving Problem] Disclosed is a potassium ionomer of a polymer or a polymer composition that contains (a) an ethylene unit in the range of 30 to 60% by weight, (b) a propylene unit in the range of 30 to 60% by weight, (c) a butene unit in the range of 2 to 10% by weight, (d) a (meth)acrylic acid ester unit in the range of 0 to 10% by weight, and (e) a (meth)acrylic acid unit in the range of 5 to 15% by weight (with the total of the component units (a) to (e) being 100% by weight). The potassium ionomer has a potassium ion density in the range of 0.5 to 1.5 mmol/g.
    Type: Application
    Filed: December 5, 2008
    Publication date: September 30, 2010
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.
    Inventors: Daisuke Matsuzaki, Kaoru Suzuki, Koki Akiyama
  • Publication number: 20100229944
    Abstract: The present invention provides an encapsulating material for a solar cell, which is easy to prepare a solar cell module, and excellent in processability, insulating property, non-corrosion property, transparency, heat resistance, flexibility and the like, and a solar cell module prepared by using the same. The encapsulating material for a solar cell is one consisting of a cross-linkable resin composition (A) containing an ethylene-(meth)acrylic ester copolymer as a base polymer, an organic peroxide and a crosslinking aid wherein the decomposition temperature (temperature for a half-life period of one hour) of the organic peroxide is equal to or lower than 150° C., and total compounding amount of the organic peroxide and the crosslinking aid, is in a range of from 0.5 to 5 parts by weight per 100 parts by weight of the base polymer, and compounding ratio of the organic peroxide and the crosslinking aid (organic peroxide/crosslinking aid) is in a range of from 1/5 to 1/0.1, in weight ratio.
    Type: Application
    Filed: February 16, 2007
    Publication date: September 16, 2010
    Applicant: Du Pont-Mitsui Polychemicals Co., Ltd.
    Inventors: Koichi Nishijima, Yasuhisa Hosoai, Youichi Shinya
  • Publication number: 20100204406
    Abstract: A resin composition comprising at least one copolymer (A) selected from an ethylene/(meth)acrylic acid copolymer (A1) and an ethylene/(meth)acrylic acid/(meth)acrylic acid ester copolymer (A2), and a polyethylene (B), wherein when the total amount of (A) and (B) in the resin composition is set to be 100% by weight, the content of (A) is less than 100 to 46% by weight, the content of (B) is in excess of 0 but not larger than 54% by weight, and (A) contains 0.1 to 5% by weight of a (meth)acrylic acid unit.
    Type: Application
    Filed: May 31, 2006
    Publication date: August 12, 2010
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.
    Inventor: Naozumi Suzuki
  • Publication number: 20100197834
    Abstract: To provide a molding material having good affinity to a starchy material, is homogeneously compatible therewith even without adding compatibility-imparting agent, can be favorably mold-worked despite the starchy material is blended in large amounts, and features excellent balance between the flexibility and the mechanical properties, as well as excellent moisture permeability, antistatic property and transparence (haze) depending upon the composition that is used. A resin composition comprising 10 to 97% by weight of at least one (A) of those selected from an ethylene copolymer containing an unsaturated carboxylic acid and an unsaturated carboxylic acid ester as constituent units or a copolymer composition thereof, and an ionomer comprising, as a base resin, the ethylene copolymer containing the unsaturated carboxylic acid and the unsaturated carboxylic acid ester as constituent units or the copolymer composition thereof; and 3 to 90% by weight a starchy material (B).
    Type: Application
    Filed: June 13, 2008
    Publication date: August 5, 2010
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD
    Inventors: Kaoru Suzuki, Norihiko Sato, Hiroshi Uchiyama
  • Publication number: 20100112335
    Abstract: A foamed layer-laminated film or sheet having a foamed layer of a thermoplastic resin laminated on a base material such as a paper or PET, and is useful as a material for producing formed articles such as paper containers, aluminum foil containers, packing films and sheets for containing high-temperature foods, beverages and the like owing to its enhanced heat-insulating property. The foamed layer has innumerable fine elongated foamed cells, and local shades of distribution density of the cells create an appearance of vertical striped patterns on a frosted-glass-like translucent background lending the laminated film or sheet well for use as a material for ornamental articles. The invention further provides a process for easily producing the film or sheet maintaining good productivity at a low cost.
    Type: Application
    Filed: April 10, 2007
    Publication date: May 6, 2010
    Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD
    Inventors: Naozumi Suzuki, Yoshio Nozaki