Abstract:
PROBLEM TO BE SOLVED: To provide a low-cost tube which satisfies demand imposed on an air brake piping relating to the resistance to chemicals, engine oils, zinc chloride and scattered salt, and which has high burst pressure strength and low-temperature impact resistance. SOLUTION: The tube comprises the following layers: I. an outer layer comprising a molding material including up to at least 40 mass%, up to at least 45 mass%, up to at least 50 mass%, up to at least 55 mass%, or up to at least 60 mass% of a polyamide a monomer unit of which has at least eight, at least nine, or at least ten carbon atoms; II. optionally a layer which comprises an adhesive molding material; and III. a layer which comprises a polypropylene molding material. Advantageously, wherein these layers are directly combined. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a production method for a molded member having improved hydrolysis resistance and produced from a polyamide molding material.SOLUTION: There is provided a method of producing a molded member in the condensation of the polyamide molding material, which method comprises (a) a step of preparing the polyamide molding material in which at least 50% of the terminal group of the polyamide is present as an amino group; (b) a step of producing a mixture of the polyamide molding material and 0.1-5 mass% oligocarbodiimide or polycarbodiimide based on the amount of polyamide molding material, in which condensation is not practically performed here; (c) a step of optionally storing and/or transporting the mixture; and (d) a step of successively processing the mixture to produce a molded member, in which condensation is performed for the first time.
Abstract:
PROBLEM TO BE SOLVED: To provide a conduit which can be effectively heated and may therefore be used for conveying oil in cold regions.SOLUTION: A flexible pipe has a multilayer structure and comprises, in order from inside to outside, following layers: an interior lining; at least two reinforcement layers made of metal; and an exterior coating. In between two reinforcement layers, there is at least one layer of a conductive plastic material. The layer of the conductive plastic material is electrically connected to both reinforcement layers, and further two reinforcement layers can be connected an electric power source.
Abstract:
PROBLEM TO BE SOLVED: To provide a flexible pipe which can be effectively heated and may therefore be used for conveying oil in cold regions.SOLUTION: A flexible pipe comprises in order from inside to outside a plurality of layers: an interior lining; at least one reinforcement layer; and further, in between two layers, another layer composed of a wound tape; and at least one reinforcement layer. The tape contains: a first exterior layer 1 of a plastics molding material that is not electrically conductive; an intermediate layer 2 of a conductive plastic molding material, whose volume resistivity to IEC 60093 is in the range from 10to 10Ωm; and a second exterior layer 3 of a plastics molding material that is not electrically conductive. In the intermediate layer, at least two metallic conductors 4 are embedded along an entire length of the tape in such a way that, the two conductors do not touch one another.
Abstract:
PROBLEM TO BE SOLVED: To provide a multilayer composite material having a good quality, especially good layer distribution and wall thickness distribution, without deteriorating the use technical properties of ETFE, such as a fuel-blocking action, when modifying ETFE. SOLUTION: A molding material comprising the following components: (a) 100 pts.mass of a polyamide and (b) 0.005 to 10 pts.mass of a compound having at least two carbonate units, for simultaneously extruding with a molding material based on a highly melting polymer having a crystallite melting point Tm of at least 255°C and/or a glass transition temperature Tg of at least 180°C. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
The invention relates to a pipeline that is installed without trench and/or sand bed and that is produced by utilizing a metallic conduit pipe clad by an extruded layer made of a polyamide compound. In this manner, the durability of the exterior cladding required for installation techniques without trench or sand bed is ensured.
Abstract:
PROBLEM TO BE SOLVED: To provide a molding material which has crystallizability enough for achieving sufficient stress crack resistance, while being sufficiently transparent. SOLUTION: The use of a polyamide molding material comprising the following components: (a) maximally 90 pts.mass of a polyamide capable of being obtained from a lactam or a ≤10C aminocarboxylic acid, and (b) 10 to 100 pts.mass of PA 1010, wherein the total amount of the components (a) and (b) is 100 pts.mass. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method by which a large producible geometrical shape article can economically be produced without being limited by the melt stiffness of a polyamide used herein. SOLUTION: This method for producing the molded member, while condensing a polyamide molding material with a compound having at least two carbonate units, is characterized by (a) preparing the polyamide molding material, (b) producing a mixture of the polyamide molding material with the compound having at least two carbonate units, (c), if necessary, storing and/or transporting the mixture, and (d) then processing the mixture into the molded member, wherein the condensation is carried out for the first time in the process, and the molded article is a hollow article or hollow deformed article having a diameter of at least 30 mm and a thickness of at least 1 mm. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a flexible, halogen-free, flame-retardant, polyamide-based molding material which has excellent combustion characteristics, in short, having V-0 in UV94 within a range of 0.4 to 3.2 mm. SOLUTION: This molding material is characterized by comprising (a) 43 to 93.5 pts.mass of a polyamide, (b) 2 to 12 pts.mass of melamine cyanurate, (c) 1.5 to 15 pts.mass of a polyol having at least three OH groups per molecule, and (d) 2 to 30 pts.mass of a phosphorus compound of the formula, wherein the total pts.mass of the components (a) to (d) is 100. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a molded member under the condensation of a polyamide molding material whose polyamide component contains phosphorus in an amount of at least 5 ppm limited by the production in the form of an acidic compound, with a compound having at least two carbonate units. SOLUTION: This method for producing the molded member is characterized by (a) adding a weak acid salt in an amount of 0.001 to 10 mass% based on the polyamide to the polyamide molding material, before or when compounded, (b) producing a mixture of the completed compound with a compound having at least two carbonate units, (c), if necessary, storing and/or transporting the mixture, and (d) then processing the mixture into the molded member, wherein a condensation is carried out for the first time in the process. According to the present invention, a middle processing pressure, a slight motor load, and the remarkable increase of melt stiffness are caused to considerably simplify the production of a hollow article or hollow deformed article having a large diameter. COPYRIGHT: (C)2006,JPO&NCIPI