Abstract:
PROBLEM TO BE SOLVED: To provide a molded motor having high quality in that the motor is durable against stress concentration due to shrinkage in molding and a tension stress in mold release, and peeling is prevented in an interface between a resin and a substrate. SOLUTION: A round hole 8 is opened between each of lands 7 and is filled with a thermosetting resin 12, a glass fiber in the thermosetting resin 12 which the round hole 8 is filled with is almost oriented in the plate thickness direction of a printed board 14, and thus, the mold motor is durable against stress concentration due to shrinkage in molding and a tension stress in mold release, and peeling is prevented from being generated in the interface between the thermosetting resin 12 and the printed board 14. In this way, the molded motor 1 is provided which ensures the high quality wherein tracking never occurs even when the motor is used in a space of high temperature and high humidity. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a light-permeable flexible substrate with a low coefficient of thermal expansion and an improved gas barrier property, and its manufacturing method. SOLUTION: The flexible substrate 10 includes a substrate 1 formed of cellulose-based nanofibers and low-melting glass 2 provided to be impregnated in the substrate 1. In addition, the other flexible substrate 10 includes a substrate 1 formed of cellulose-based nanofibers and low-melting glass joined to one of principal planes of the substrate 1. A glass-transition temperature of the low-melting glass 2 is 300°C or lower. The flexible substrate 10 is light-permeable. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To inexpensively obtain a nanofiber sheet in which the constituent cellulose fiber is made fine enough by fiber-opening and has a high crystallinity and which can realize a fiber-reinforced composite material having high transparency, high modulus of elasticity, a low coefficient of linear thermal expansion, high heat resistance, flatness, and smoothness. SOLUTION: The nanofiber sheet is a nanofiber sheet principally made of crystalline cellulose and has a lignin content of 10 ppm to 10 wt.% and is characterized in that a fiber/resin composite material obtained by impregnating the nanofiber sheet with tricyclodecane dimethacrylate, subjecting the impregnated product to UV-curing at 20J/cm 2 , and heat-treating the cured product in vacuum at 160°C for 2 h and having a cured tricyclodecane dimethacrylate content of 60 wt.% and a nanofiber content of 40 wt.% satisfies the following physical properties (1) to (3): (1) a parallel light transmittance ≥70% (to light of a wavelength of 600 nm at a sheet thickness of 100μm), (2) a Young's modulus ≥5.0 GPa, and (3) a coefficient of linear thermal expansion ≤20 ppm/K. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To obtain a sheetlike composite material in which a filler is oriented in a fixed direction in an organic resin matrix by an electric field. SOLUTION: The sheetlike composite material 10 comprises a filler 1 and an organic resin 3. The filler 1 is aggregated in a dendritic state in the organic resin matrix and oriented in the thickness direction. Consequently the sheetlike composite material has greatly improved properties such as dielectric characteristics, conductivity, thermal conductivity, etc., in comparison with a conventional composite material in which a filler is simply dispersed. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
The invention is directed to polyimide based adhesives having a coefficient of thermal expansion (“CTE”) equal to or below 50 ppm/° C. The adhesives of the present invention contain a polyimide base polymer present in the overall adhesive in an amount from 25 to 95 weight percent. The polyimide base polymer has a glass transition temperature (“Tg”) in a range of from about 150 to about 300° C. and typically has a coefficient of thermal expansion above 50 ppm/° C. The polyimide based adhesives of the invention also contain an aramid micro fiber filler in an amount from 5 to 75 weight percent, based upon the total weight of the polyimide based adhesive. The fiber filler can be used to lower CTE of the overall adhesive to match (or nearly match) the CTE of other materials like metal, silicon wafers, other polymers (including polyimide) and the like.
Abstract:
PROBLEM TO BE SOLVED: To provide a fiber-reinforced composite material in which high transparency can be always maintained without no influence of temperature conditions or wavelengths, and to which various functionalities are given by a composite of the fibers and the matrix material. SOLUTION: A fiber-reinforced composite material comprising fibers having an average fiber diameter of 4 to 200 nm, and a matrix material, and 60% or above of light transmittance of a wavelength of 400 to 700 nm in 50 μm of thickness. Due to the fiber having an average fiber diameter smaller than the wavelength of a visual light (380 to 800 nm), little refraction of the visible light by the fibers may be generated, and further, scattering loss of the visible light at the interface between the fibers and the matrix material cannot easily occur even when the temperature or wavelength is changed. Therefore, high transparency of a visible transmittance of 60% or above in 50 μm of thickness can be stably maintained. COPYRIGHT: (C)2010,JPO&INPIT