| PRIME POLYMER CO., LTD. Patent applications |
| Patent application number | Title | Published |
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| 20120065306 | LONG-FIBER REINFORCED RESIN COMPOSITION AND MOLDED OBJECT THEREOF - A long fiber-reinforced resin composition including components (A), (B), and (C), the composition including 50 to 90 wt % of the component (A) and 10 to 50 wt % of the component (B) based on the total content of the components (A) and (B), the component (A) having a content of reinforcing fibers of 20 to 60 wt % based on the total content of the components (A) and (B). | 03-15-2012 |
| 20120041162 | METHOD FOR PRODUCING OLEFIN POLYMER - [Object] An object of the present invention is to provide a method for producing an olefin polymer, with which an olefin polymer having good particle properties can be produced in high activity, contamination inside the polymerization vessel, such as a vessel wall or an impeller, can be effectively prevented, and a long-term stable operation is achieved. | 02-16-2012 |
| 20110304066 | INJECTION FOAM MOLDING METHOD AND APPARATUS THEREFOR - After introducing gas into a cavity of a clamped die to boost a pressure therein, a resin material containing a foaming agent is injected. After forming a skin layer, at the same time as a start of a core-back operation for foaming the resin material or after the core-back operation, gas in the cavity is vacuum-suctioned to make a pressure in the cavity less than the atmospheric pressure. By cooling and solidifying, an injection foam molded article is obtained. Before complete solidification, gas between the resin material and an inner surface of the die is reliably discharged out of the cavity, so that surface recesses and generation of swirl marks due to gas accumulation can be prevented. | 12-15-2011 |
| 20110294016 | POLYPROPYLENE RESIN COMPOSITION FOR USE IN FORMATION OF MICROPOROUS MEMBRANE - [Object] To provide a polypropylene resin composition for use in the formation of a microporous membrane having excellent heat resistance and low thermal shrinkage ratio. | 12-01-2011 |
| 20110269900 | POLYPROPYLENE RESIN COMPOSITION FOR USE IN FORMATION OF MICROPOROUS MEMBRANE - [Object] To provide a polypropylene resin composition for use in the formation of a microporous membrane having excellent heat resistance and strength. | 11-03-2011 |
| 20110133509 | Resin composition for seamless air bag covers, and seamless air bag covers or seamless instrument panels with air bag covers, made by using the composition - A resin composition for a seamless air bag cover or a resin composition for a seamless instrument panel having an air bag cover which comprises (A) 50 to 90% by mass of polypropylene, (B) 0 to 20% by mass of a thermoplastic elastomer and (C) 10 to 30% by mass of talc having an average particle diameter of 15 to 25 μm and a distribution of a particle diameter such that the content of particles having a diameter of 5 μm or smaller is 10% by mass or smaller and the content of particles having a diameter exceeding 40 μm is 10% by mass or smaller. The resin composition exhibits sufficient properties when an instrument panel is molded. A seamless instrument panel having an air bag cover can be obtained as an integrally molded product, which can be treated as a single article in recycling. | 06-09-2011 |
| 20110040022 | LONG-FIBER-REINFORCED RESIN COMPOSITION AND MOLDED ARTICLE THEREOF - A long-fiber-reinforced resin composition including the following component (A) and the component (B), the content of the component (A) being 50 to 90 wt % and the content of the component (B) being 10 to 50 wt %; and the content of reinforcing fiber contained in the component (A) being 20 to 60 wt % relative to the total amount of the fiber-reinforced resin composition: | 02-17-2011 |
| 20100310842 | Film for thermal sterilization packaging - Provided is a film for thermal sterilization packaging which is excellent in a total balance of characteristics such a transparency, an impact resistance, a heat sealing property, a blocking resistance, a heat resistance and the like. | 12-09-2010 |
| 20100292421 | BRIDGED METALLOCENE COMPOUND, OLEFIN POLYMERIZATION CATALYST CONTAINING THE SAME, AND ETHYLENE POLYMER OBTAINED WITH THE CATALYST - Metallocene compounds of the invention are useful as olefin polymerization catalysts or catalyst components. Olefin polymerization processes of the invention involve an olefin polymerization catalyst containing the metallocene compound. In detail, the olefin polymerization catalysts can catalyze with high polymerization activity the production of olefin polymers having high melt tension, excellent mechanical strength and good particle properties, and the olefin polymerization processes involve the catalysts. Ethylene polymers according to the invention are obtained by the polymerization processes and have higher processability and easy-opening properties and particularly excellent mechanical strength compared to conventional ethylene polymers. Thermoplastic resin compositions of the invention contain the ethylene polymers. In more detail, shaped articles or films are obtained from the ethylene polymers or the thermoplastic resin compositions containing the ethylene polymers, and laminate films include the films. | 11-18-2010 |
| 20100234810 | POLYPROPYLENE RESIN FOR SYRINGE, SYRINGE PRODUCED FROM THE SAME AS RAW MATERIAL, AND PREFILLED SYRINGE PREPARATION - It is an object of the present invention to provide a polypropylene resin for syringe that can be used as a raw material for syringe that is excellent in sanitary property, heat resistance and transparency and hardly elutes low molecular weight substance and that can prevent formation of foam during molding, achieve long-run moldability and being prevented from scratches when removed from a core molding die in injection molding at satisfactory levels that have not been achieved conventionally. The polypropylene resin for syringe of the present invention comprises an ethylene-propylene block copolymer (A) having a melt flow rate (ASTM D 1238, 230° C., 2.16 kg load) of 10 to 60 g/10 min and being constituted of 85 to 97% by weight of a room-temperature n-decane-insoluble portion (D | 09-16-2010 |
| 20100227098 | Ethylenic Resin and Blow Molded Article Obtained Therefrom - An ethylene-based resin satisfying simultaneously the following requirements [a] to [c] is excellent in strength and moldability and is suitably used for a blow molded article (a hollow molded article). [a] The environmental stress cracking resistance (ESCR), T, at 50° C. is 500 hours or more in the case of a flexural modulus of 1000 MPa to 1500 MPa and is 100 hours or more in the case of a flexural modulus of 1500 MPa to 2000 MPa, as measured according to ASTM-D-1693, [b] the melt tension at 190° C. is 50 (mN) or more and [c] the melt breaking drawing rate is 90 (m/min) or less. | 09-09-2010 |
| 20100210780 | POLYPROPYLENE RESIN COMPOSITION - Polypropylene resin compositions are suited for injection molding and are capable of giving molded articles having excellent mechanical properties, reduced tendency to cause flow marks or weld marks, low gloss, and superior scratch resistance. A polypropylene resin composition includes: an amount of a resin composition (F) including a polypropylene (A), an ethylene-α-olef in copolymer or an ethylene-α-olefin-diene copolymer (B-I) having MFR of less than 0.4 g/10 min, an ethylene-α-olefin copolymer (B-2) having MFR of 0.5 to less than 20 g/10 min, and an inorganic filler (C); and specific amounts relative to the resin composition (F) of a modified polypropylene (D) and a surface modifier (E). | 08-19-2010 |
| 20100040813 | Polypropylene resin and blow molded container - Polypropylene resins of the present invention give blow molded containers excellent in transparency, impact resistance and flexibility. Stretch blow molded containers obtained from the polypropylene resins enable volume reduction and weight reduction. A polypropylene resin includes a random polypropylene (P1) having MFR (ASTM D 1238, 230° C., 2.16 kg load) of 0.5 to 100 g/10 min and an ethylene content of 3.0 wt % to less than 7.0 wt %, (i) the resin containing the random polypropylene (P1) at not less than 80 wt %, (ii) the resin showing a broad DSC melting curve which has a single melting point peak and in which the maximum intensity peak temperature (Tm) is not more than 120° C. and the half-value width on a higher temperature side from the maximum intensity peak is not less than 20° C. | 02-18-2010 |
| 20100040724 | INJECTION MOLDING METAL MOLD AND SHAPED ARTICLE - An injection-molding die including: a fixed die; a movable die; a cavity defined by the fixed die and the movable die; and a gate for injecting a melt resin into the cavity. The cavity includes: a flow-dividing structure that divides a flow of the melt resin injected into the cavity into a plurality of resin flows; and a flow-advancing area in which the resin flows generated by the flow-dividing structure are merged together. The flow-advancing area is formed thicker than a flow-hesitating area of the flow-advancing area in the cavity. | 02-18-2010 |
| 20100028578 | BLOW MOLDING ETHYLENE RESIN COMPOSITION AND BLOW MOLDED ARTICLE THEREFROM - A blow molding ethylene resin composition satisfies the following requirements [a], [b], [c] and [d] at the same time:
| 02-04-2010 |
| 20090317615 | PACKAGING PROPYLENE RESIN COMPOSITION - Packaging propylene resin compositions are excellent in balance in high transparency, rigidity, low-temperature impact resistance and blocking resistance. Retort films, protective films, medical container packaging films and freshness-keeping films, and sheets for similar purposes are obtained from the compositions. A packaging propylene resin composition includes a propylene polymer (A) satisfying specific requirements and a propylene/ethylene copolymer (B) satisfying specific requirements. In another packaging propylene resin composition, D | 12-24-2009 |
| 20090305591 | DYEABLE POLYPROPYLENE RESIN COMPOSITION AND FIBER/NONWOVEN FABRIC COMPRISING THE SAME - A novel propylene resin composition which can readily impart polypropylene fibers with excellent dyeability and can provide dyed fibers improved in washing resistance and weatherability is provided. A polypropylene resin composition obtained by melt blending the following components (A) to (C):
| 12-10-2009 |
| 20090297819 | Fiber-reinforced resin composition and molded article thereof - A fiber-reinforced resin composition comprising: (A) a polyolefin-based resin; (B) glass fibers having (B1) an average diameter of 3 to 30 μm and (B2) an average aspect ratio of 50 to 6000; and (C) an acid-modified polypropylene-based resin exhibiting (C1) a change in amount of acid added, measured by Fourier transform infrared spectroscopy, before and after being treated in methyl ethyl ketone at 70° C. for three hours of 0.8 mass % or less, and having (C2) a melt flow rate (load: 2.16 kg, temperature: 230° C.) of 20 to 2000 g/10 min; the composition containing the components (A) to (C) at such a ratio (mass ratio) that (B):[(A)+(C)]=5 to 80:95 to 20 and (A):(C)=0 to 99.5:100 to 0.5. | 12-03-2009 |
| 20090291285 | FILM OR LAMINATE COMPRISING ETHYLENE-BASED RESIN OR ETHYLENE-BASED RESIN COMPOSITION - The present invention provides a film including, in at least a part thereof, a layer comprising an ethylene-based resin, which is a copolymer of ethylene and an α-olefin of 4 to 10 carbon atoms, and satisfies the following requirements (1) to (5) at the same time or an ethylene-based resin composition containing the resin;
| 11-26-2009 |
| 20090270580 | Ethylene Polymer, and Thermoplastic Resin Composition Comprising the Same, and Molded Product Obtained Therefrom - Provided is an ethylene polymer of the present invention, which is a copolymer of ethylene and an α-olefin having 4 to 10 carbon atoms, and satisfies the following conditions [1] to [4] simultaneously:
| 10-29-2009 |
| 20090155567 | EXTRUDED PROPYLENE RESIN FOAM AND PROCESS FOR PRODUCING EXTRUDED PROPYLENE RESIN FOAM - The extruded propylene-based resin foam according to the present invention is extruded propylene-based resin foam that is formed by extrusion-foaming a propylene-based resin, and the extruded propylene-based resin foam has the expansion ratio of 10 or more and the average cell diameter of less than 400 μm. In addition, the extruded foam contains a 60 or less wt % fibrous filler in relation to the whole molding material. With this configuration, the extruded foam can have a plurality of foam cell walls therein. Thus, the extruded foam can efficiently block external radiant heat, thereby realizing excellent insulation efficiency. Furthermore, because the fibrous filler is oriented along the thickness direction, even when the extruded foam is slightly strained in the thickness direction, a high stress arises, thereby improving energy-absorbing capability. | 06-18-2009 |
| 20090140447 | Expansion Injection Molding Process And Mold For Expansion Injection Molding - To provide an expansion injection molding process, which is freed from the occurrence of swirl marks on the surface of a molded article and by which foamed injection moldings having good appearance can be produced in a short molding cycle and at a low cost; and a mold for expansion injection molding. | 06-04-2009 |
| 20090076179 | EXTRUDED PROPYLENE-RESIN COMPOSITE FOAM - The extruded propylene-based resin composite foam ( | 03-19-2009 |
| 20090075078 | MODIFIED POLYOLEFIN RESIN FOR GLASS FIBER TREATMENT, SURPACE-TREATED GLASS FIBER, AND FIBER-REINFORCED POLYOLEFIN RESIN - An acid-modified polyolefin-based resin for glass fiber treatment having: (1) an amount of components extractable with boiling methyl ethyl ketone of 8 mass % or less; (2) a number average molecular weight (Mn), measured by gel permeation chromatography (GPC), of 6,000 to 48,000; and (3) an amount of an acid which has been added, measured by Fourier transform infrared spectroscopy, of 0.1 to 12 mass %. | 03-19-2009 |
| 20090069523 | Propylene Random Block Copolymer, Resin Composition Containing the Copolymer and Molded Article Made Thereof - The invention provides a propylene random block copolymer (A) that has a melt flow rate from 0.1 to 100 g/10 min and a melting point from 100 to 155° C. and includes 90 to 60% by weight of a portion insoluble (D | 03-12-2009 |
| 20090036584 | Environmental Stress Cracking Resistance Improver, and Resin Composition With Improved Environmental Stress Cracking Resistance Properties Containing the Same - Disclosed is an environmental stress cracking resistance improver that is composed of a compound that has in the molecule thereof a structure represented by the following general formula (I) and a molecular weight of from 200 to 2,000. Also disclosed are a method for improving environmental stress cracking resistance properties that uses the environmental stress cracking resistance improver, and a resin composition with improved environmental stress cracking resistance properties that contains the environmental stress cracking resistance improver. | 02-05-2009 |
| 20090026010 | PROCESS FOR PRODUCING SOUND ABSORBER AND PRODUCED BY THE PROCESS, SOUND ABSORBER AND SOUND ABSORBING STRUCTURE - A process for producing a sound absorber having skin layers constituting front and back surfaces and, interposed between the skin layers, a void layer having a number of voids, and having a plurality of formed holes each having a depth which is enough to penetrate one of the skin layers and is not enough to reach the other skin layer; comprising: providing a mold having a fixed part, a movable part, and at least one pin disposed in a manner that it can be projected into and retracted from a cavity; and having a step to cause the pin to project into the cavity during the course of charging the cavity with a resin material and molding the sound absorber and form the holes communicating with the void layer simultaneously with molding of the sound absorber. | 01-29-2009 |
| 20090018299 | Ethylenic Polymer and Molded Article Obtained Therefrom - An ethylene-α-olefin copolymer for a film or sheet satisfying the following requirements [1] to [5] simultaneously is excellent in transparency and moldability and is suitably used for a film or sheet excellent in mechanical strength. | 01-15-2009 |
| 20090012238 | RESIN COMPOSITION, TRANSPARENT FILM OR SHEET HAVING ELASTICITY RECOVERING PROPERTY, AND WRAP FILM - The present invention provides a propylene-ethylene copolymer which is excellent in a balance between a heat resistance and an elasticity recovering property and has a good transparency and which is improved in peel whitening brought about by mutual adhesion in storing specific to soft materials, a resin composition for a transparent elasticity recovering film or sheet comprising the above copolymer, a transparent elasticity recovering film or sheet and a wrap film. | 01-08-2009 |
| 20090011218 | Extruded Propylene Resin Foam and Process For Production Thereof - Extruded propylene-based resin foam according to the present invention is formed by extrusion-foaming a propylene-based resin, and the extruded propylene-based resin foam has a closed cell content of less than 40% and an expansion ratio of 10 or more. Since the extruded propylene-based resin foam has an open-cell structure in which a cell-broken state is formed at a desired level and has a high expansion ratio, each cell in the foam has a sound absorption performance, such that the extruded foam is excellent in sound absorption performance. | 01-08-2009 |
| 20080242793 | Fiber-Reinforced Resin Composition and Molded Body Thereof - Disclosed is a fiber-reinforced polyolefin resin composition containing (A) 1-20 mass % of carbon fibers having a fiber diameter of 3-20 μm, (B) 3-50 mass % of black lead (graphite) having an average particle diameter of 1-100 μm, and (C) 25-95 mass % of a polyolefin resin, wherein the mass ratio of the black lead (graphite) (B) (Wg) to the carbon fibers (A) (Wcf), namely mass ratio (Wg/Wcf), is 1-10. Also disclosed is a molded body of such a fiber-reinforced polyolefin resin composition. | 10-02-2008 |
