Honda Giken Kogyo Kabushiki Kaisha

Mitsui Toatsu Chemicals, Incorporated

Idemitsu Petrochemical Co., Ltd.

Japan Polyolefins Co., Ltd.

Mitsui Chemicals, Inc.

Tokai Kogyo Company Limited

Kenji Hamabe

Osamu Aoki

Atsushi Takeuchi

Hitoshi Ohgane

Minoru Makuta

Takayuki Onda

Hirofumi Murakami

Kazuo Ito

Keigo Suehiro

Takashi Nakayama

Tatsuya Itakura

Kazuhiko Sakai

Akihiro Katagiri

Katsuyuki Nitta

Yutaka Kobayashi

Takeaki Inokuma

Masahito Mitsumori

Chihiro Ogawa

Atushi Takeuchi

Hiroshi Kaneda

Yoshio Kitawaki

Kazuo Inoue

Tsuneo Konno

Katsumi Sekiguchi

Takashi Moriya

Masaki Ueyama

Masataka Kumata

Kazuhiro Miura

Hiromasa Marubayashi

Hiroo Shimada

Masato Ishibashi

Toshinobu Hata

Katsuyuki Amano

Tomohiro Sakuraba

Renji Maki

Hiroshi Kiyomoto

Yoshihisa Saeki

Tetsuo Gotou

Sachio Yokote

Morimasa Nagata

Tomoyoshi Matsuno

Naomi Warashina

Keiichi Satoh

Nobuhiro Imai

Hiroyuki Toshino

Kouzou Hayashi

Masaya Akiyama

A resin composition utilizing coated resin moldings, the resin composition comprising 100 parts by weight of a crushed material of coated polyolefin resin moldings compounded with from 3 to 15 parts by weight of an ethylene polymer having a weight average molecular weight of from 50,000 to 180,000.

Resin composition utilizing coated resin moldings and multilayer resin

A process for producing a bumper of synthetic resin for use in an automobile, the bumper including a core and an outer layer covering the core. The process includes the steps of preparing a core forming material that includes a main component and a polyethylene added to the main component, the main component being produced by pulverizing a recovered bumper which has been formed using a polyolefin-based resin composition modified by an olefinic elastomer and which has a thermosetting synthetic resin coating film on its surface, and an outer layer forming material that includes the polyolefin-based resin composition modified by the olefinic elastomer and the polyethylene in a content A.sub.2 which is smaller than a content A.sub.1 of the polyethylene included in the core forming material (A.sub.2 &lt;A.sub.1); injecting the outer layer forming material through a feed channel into a bumper molding cavity in a mold; injecting the core forming material to flow into the outer layer forming material located in the feed channel and the cavity, and allowing the outer layer forming material and the core forming material to flow into the cavity; and pushing the outer layer forming material and the core forming material which are located in the feed channel into the cavity by the outer layer forming material thereby to form the core and the outer layer.

Process for producing automobile bumper made of synthetic resin

Disclosed is a resin composition for the making of automobile bumpers comprising specified amounts of (A) a specific propylene-ethylene block copolymer, (B) a specific propylene homopolymer, (C) (C1) an ethylene-propylene copolymer rubber (EPM) and/or (C2) an ethylene-propylene-diene copolymer rubber (EPDM), (D) talc, and optionally (E) a polyhydroxy polyolefin. This resin composition shows an improvement in flexural modulus of elasticity and low-temperature impact resistance and also has good processability by injection molding, especially in terms of planar smoothness. Moreover, when component (E) is added, this resin composition provides automobile bumpers having adequate coating adhesion and hence excellent paintability. Thus, this resin composition is highly suitable for use in the making of automobile bumpers.

Resin composition for use in the making of automobile bumpers and

A multilayer resin molding, utilizing coated resin moldings, composed of a core material and a surface layer covering the core material, the core material being composed of a resin composition which comprises 100 parts by weight of a crushed material of coated polyolefin resin moldings compounded with from 3 to 15 parts by weight of an ethylene polymer having a weight average molecular weight of from 50,000 to 180,000 and the surface layer comprising a polypropylene resin composition comprising from 30 to 80% by weight of a propylene polymer, from 3 to 20% by weight of a propylene polymer modified with an unsaturated hydroxy compound, from 15 to 40% by weight of a thermoplastic elastomer, and from 0.1 to 10% by weight of an oligomer having a functional group at the terminal thereof.

Multilayer resin molding utilizing coated resin moldings

A bumper of synthetic resin for use in an automobile includes a core, and an outer layer covering the core. The material for forming the core includes a main component produced by pulverizing a recovered bumper which has been formed using a polyolefin-based resin composition modified by an olefinic elastomer and which has a thermosetting synthetic resin coating film on its surface, and a polyethylene added to the main component. The material for forming the outer layer includes the polyolefin-based resin composition modified by the olefinic elastomer and the polyethylene in a content A.sub.2 which is smaller than a content A.sub.1 of the polyethylene in the core forming material (A.sub.2 &lt;A.sub.1). The impact resistance of the core is enhanced with the addition of the polyethylene, despite the inclusion of the coating film particles. The outer layer is excellent in heat resisting characteristic, because of a smaller content of the polyethylene.

Bumper made of synthetic resin for automobile, and process for producing

Disclosed is a side protective moulding having a decorative section and a rib section. The decorative section has a protruding section protruding most with respect to a door, and a curved section extending aslant from the protruding section toward the door. The rib section has a hollow section formed on the back side of the protruding section and a reinforcing leg section extending from the hollow section toward the door. The side moulding is moulded by a hollow injection moulding process. Adopting this moulding process can improve the outside appearance of the side moulding by eliminating sink marks and wrinkles from the surface of the decorative section if a thick wall section for increasing side moulding rigidity and impact strength is formed on the back side of the decorative section.

Side protective moulding for automobiles

A molded protective strip for automobiles is prepared by the gas injection molding of a resin composition which comprises (A) 55 to 75% by weight of polypropylene, (B) 18 to 30% by weight of ethylene-propylene copolymer rubber, and (C) 10 to 20% by weight of talc, has a ratio (MI).sub.PP /(MI).sub.EPR of 10 or less, and a polydispersity index of 20 to 100. (MI).sub.PP and (MI).sub.EPR represents melt indices of the polypropylene of component (A) and the ethylene-propylene copolymer rubber of component (B), respectively. The polydispersity index is calculated from a frequency-storage modulus curve obtained with a composition consisting of components (A), (B), and (C) alone at the temperature of 230.degree. C. The molded protective strip can be prepared without using a vinyl chloride resin, shows almost no heat shrinkage, has a small coefficient of linear expansion, is excellent in dimensional stability, and exhibits excellent appearance.

Molded protective strip for automobiles

A polypropylene resin composition comprising: (a) 50 to 90% by weight of polypropylene, (b) 50 to 10% by weight of an ethylene-.alpha.-olefin copolymer elastomer having a Mooney viscosity (ML 1+4 (100.degree. C.)) of 10 to 100, (c) 0.5 to 10 parts by weight per 100 parts by weight of the total of the amounts of the components (a) and (b) of a linear olefinic polymer containing hydroxyl group which is liquid at room temperature, and (d) 0.5 to 15 parts by weight per 100 parts by weight of the total of the amounts of the components (a) and (b) of a linear olefinic polymer having a melting point of about 70.degree. to about 90.degree. C. and a number-average molecular weight of 1500 to 6000 and containing hydroxyl group or carbonyl group; and a protective strip for automobiles using the polypropylene resin composition are disclosed. Coating immediately after degreasing is made possible and excellent property for coating can be provided by using the polypropylene resin composition.

Polypropylene resin composition and a molded article thereof

A polypropylene resin composition which comprises (A) 100 parts by weight of polypropylene, (B) 20-50 parts by weight of at least one elastomer selected from an ethylenic elastomer, an hydrogenated styrene-butadiene copolymer and a hydrogenated styrene-isoprene block copolymer, (C) 0.3.about.20 parts by weight of polycarbonatediol having a skeleton of aliphatic carbonate with both terminals being a hydroxyl group and (D) 0.about.50 parts by weight of an inorganic filler. The resin composition can provide a molded article having a good adhesive property to a film applied thereon without pretreatment by a halogen-containing solvent.

Polypropylene resin compositions, coating process for moldings thereof

A coated molded article having good adhesion to a coating film and resistance to gasohol as well as excellent appearance can be obtained by applying a primer coating to the surface of a molded article or irradiating the surface with plasma without applying any washing-treatment with a halogen atom-containing organic solvent and then applying a top coat onto the article, if the molded article is formed from a resin composition comprising (A)a polypropylene; (B)a specific ethylene-propylene-diene terpolymer rubber; (C) a specific ethylene-propylene copolymer rubber; and (D) a specific polyhydroxypolyolefin, the amounts of these components (A) to (D) satisfying the following relations:

A process for the high speed production of fiber reinforced plastic moldings forms several preforms which are solidified with chopped fibers, resin powders and a binder and are held between two preheating plates. Each plate is formed of a thin metal plate and will preheat the preforms to a temperature higher than the melting point of the resin. While the preforms are held between the preheating plates, the preforms are cold-pressed in a mold maintained at a temperature lower than the melting point of the resin for simultaneous impregnation and cooling of the resin. In addition, a preforming mold is placed in a vacuum chamber and precut chopped fibers are positioned in a tank. The preforming mold is placed into the tank and an exhauster is actuated to vacuumize both the vacuum chamber and the preforming mold, thereby adsorbing the chopped fibers in the tank onto the preforming mold and forming on the surface of the preforming mold an unsolidified preform comprising the chopped fibers. Resin powders are sprayed onto the preform for adsorption. A binder is subsequently applied under reduced pressure onto the preform. After drying the preform, the chopped fibers along with the binder are solidified.

Process for the high speed production of fiber reinforced plastic

A cylinder block as a main part of an engine block includes a cylinder barrel assembly block, a skeleton-like frame surrounding the outer periphery of the cylinder barrel assembly block and a plate-like rigid film member, within a fluid passage in the skeleton-like frame. The skeleton-like frame is integrally joined to the outer surfaces of left and right side walls of the assembly block along the crankshaft axis and includes crossbeam bone members, longitudinal beam bone members and post bone members which are rigid and unitarily assembled into a three-dimensional latticework structure. A cylinder head is integrally coupled to the deck surface of the cylinder block and a lower case is integrally coupled to the lower surface of the cylinder block, lateral outer surfaces of the block and lower case along the crankshaft axis being formed flush with each other in parallel with the cylinder bore axis. The lower case includes a lower case frame of three-dimensional latticework structure and rigid film members at least on the lateral outer surfaces of the lower case frame along the crankshaft axis. Moreover, the lower case is secured to the lower surface of the cylinder block by bolts and an oil pan is floatingly carried on the lower surface of the lower case via resilient members. The cylinder block has at its one end surface along the crankshaft axis a square, transmission mating surface and a divergent bulged portion extending from a rear part of the cylinder block toward the mating surface.

Engine block construction with skeletal frame

A vane air pump has a vane holder which includes a main body. A vane extends outward from one side of the main body and a balance weight extends outward from the other side of the main body in a direction opposite to the vane. The balance weight is cast integrally with the main body. The method discloses integrally forming a balance weight with the main body of the vane holder.

Vane holder for vane pump and method of making same

A vane type air pump having vanes with an edge that slidably engages the inside of a cylindrical casing and sides that slidably engage carbon sealing elements. The vanes are constructed of pre-impregnated glass cloth with the warp and weft positioned at acute angles to the sealing element to provide less and smoother wear on the sealing element and inhibit air leakage. A heavy density weave of glass cloth also reduces the wear.

Vane structure for vane type air pumps

Growing community of inventors

Wako, Japan

Kenji Hamabe