Abstract:
PROBLEM TO BE SOLVED: To provide a monolayer or multilayer film for decoration, which comprises a polyamide composition having good chemical resistance and stress crack resistance and improved scratch resistance. SOLUTION: The decorative film having an outer layer that comprises a polyamide composition comprising the following components: (a) a 50 to 100 parts by mass polyamide that can be produced from the following monomers including (α) a diamine selected from among m-xylylene diamine, p-xylylene diamine, and the mixtures thereof, (β) another diamine having 6 to 14 carbon atoms, and (γ) an aliphatic dicarboxylic acid having 10 to 18 carbon atoms and (δ) another dicarboxylic acid having 6 to 9 carbon atoms; (b) another 0 to 50 parts by mass polyamide (where the total parts by mass of (a) and (b) is 100). According to the present invention, the film has no tendency of forming any sediment, has improved lightness, and maintains the appearance of the surface for a long time period. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide polyamide powder for forming a formed article by the laser sintering of the polyamide powder laminated in layers, requiring decreased amount of virgin powder and generating little recycling powder to be discarded. SOLUTION: The powder is a mixture of two kinds of polyamide powders adjusted to opposite difunctional nature and composed of powder of a dicarboxylic acid-treated polyamide or copolyamide treated with a dicarboxylic acid as an adjusting agent and powder of a diamine-treated polyamide or copolyamide treated with a diamine as an adjusting agent. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a molding method requiring no tool, achieving a low BET surface area, round particle shape, and a low viscosity at a temperature slightly higher than fine crystal melting point, which do not originally match with each other, allowing for usage of a polymer powder having a high enthalpy, wherein this fabrication method is a laminatingly working method, in which a selective region of each of powder layers is melted by using electromagnetic energy, and made a desired molded product bonded by cooling. SOLUTION: A specific copolyamide powder manufactured by using laurinlactam or ω-aminoundecanoic acid, either dodecanedioic acid or sebasic acid, and either decanediamine or dodecanediamine, is laminatingly worked by melting it in selective region of powder layer every time. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method having one process for preparing a primary diamine having a linear main chain.SOLUTION: In the method for preparing a primary diamine having a linear main chain, the primary diamine is prepared by reacting the corresponding diol with ammonia and/or an ammonia-liberating compound or a mixture of them in a liquid or supercritical phase in the presence of a homogeneous ruthenium catalyst.
Abstract:
PROBLEM TO BE SOLVED: To provide a polymer powder which enables to produce a molded article having surface quality high as far as possible, and faithful to a mold as far as possible. SOLUTION: The polymer powder is used for lamination molding carried out by selectively and timely melting a region of a powder layer by introduction of electromagnetic energy. The powder is characterized by including at least one homopolyamide produced by polycondensation of a diamine with a dicarboxylic acid, and having at least 125 J/g of a melting enthalpy and at least 148°C of a recrystallization temperature. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a polymer powder with polyamide, the use of this polymer powder in a molding process, and moldings produced from this polymer powder. SOLUTION: A layer-by-layer process is provided where regions of the polymer powder layer are selectively melted and adhered via the introduction of electromagnetic energy, and after cooling, the regions are then solidified and can be removed in the form of moldings from the powder bed. The selectivity of the layer-by-layer process may be achieved by way of the application of susceptors, absorbers, inhibitors, or masks, or by way of focused introduction of energy. The polymer powder is provided which is produced from a polyamide having a medium-sized lactam ring as a base and which can omit costly steps of the extraction of remaining monomers from the polyamide. A stack of remaining monomers on an optical structural member is largely avoided, and an assembling process for RP/RM processes becomes safer and more stable. Structural member properties, particularly those of surfaces, are extremely good, and are more reproducible than those when using conventional powders. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide polymer powder from which impact-resistant molded articles can be produced by a processing method capable of being realized as well as possible.SOLUTION: This polymer powder is used for a method for introducing electromagnetic energy into a selected range of a powder layer each time to melt, thereby producing a laminated molded article. The powder has at least one block polyether amide comprising an oligoamidedicarboxylic acid and a polyetheramine.
Abstract:
PROBLEM TO BE SOLVED: To provide a production process of a surface decorated molded member, which welds at least a surface part of a molded member with a decorative film under electromagnetic incident by applying the electromagnetism to a single layer or multi layer film. SOLUTION: A tool free production process comprises; preparing a molded member containing a filler or a reinforcement, preparing the decorative film of which at least a surface part is single layered or multilayered, and welding them under electromagnetic incident. The surface of the molded member produced e.g. by a rapid prototyping at a first step in the production process of the surface decorated molded member is decorated afterward. COPYRIGHT: (C)2009,JPO&INPIT
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:
PROBLEM TO BE SOLVED: To produce an antistatic plastic product which is highly stable against peroxide-containing fuels or solvents and is slightly sensitive to thermal aging. SOLUTION: A polyamide-containing thermoplastic molding material for producing the plastic product comprises 3-30 mass% electroconductive carbon black. The electroconductive carbon black is specific in satisfying the following parameters (a)-(d): (a) 100-300 ml/100 g DBP absorption; (b) 30-180 m 2 /g specific surface area; (c)