摘要:
An epoxy resin composition having a remarkably improved storage stability and an excellent hardening characteristic when heated, which comprises an epoxy resin and an aromatic amino carboxylic acid or a derivative thereof as a hardener for the epoxy resin. This composition can be molded by injection molding, heretofore being deemed inapplicable to epoxy resin compositions, whereby the molded articled of epoxy resin can be produced with a high molding efficiency.
摘要:
A copper clad laminate having a bonded side ensuring powerful adhesion between the copper foil and insulating layer, without providing protrusions on the copper foil or making roughing treatment or black treatment, by designing such a configuration that the copper foil has a metal layer on the side to be bonded with the insulating layer and the metal layer and insulating layer are cross-linked with each other by chemical bonds through sulfur atoms. Further, there is provided a multilayer printed circuit board which has a bonded side ensuring a powerful adhesion of the circuit copper foil and insulating layer, by designing such a configuration that the alternating metal layers and insulating layers are cross-linked with each other by chemical bonds through sulfur atoms.
摘要:
A thin film multilayer wiring board-producing method of the present invention is intended to decrease thermal stresses developing during the formation of the multilayer construction, and also to greatly reduce the number of the steps of the process, as compared with a conventional method. A film material can be used as an insulating film of the multilayer wiring board, and is adhesively bonded to a predetermined portion. Wiring conductors are formed by electroplating. The wiring layers are repeated laminated to form the multilayer construction. A metallic film serving as an electrode is formed on one of upper and lower surfaces of a substrate, the metallic film being removed after a multilayer wiring is formed. A soluble insulating film is formed on a metallic undercoat film on the substrate, and grooves are formed in the soluble insulating film, and wiring conductors are formed in the grooves, using either electroplating or both electroplating and electroless plating. Thereafter, the soluble insulating film and the metallic undercoat film are removed. Subsequently, an insoluble insulating film is formed at those locations from which the soluble insulating film and the metallic undercoat have been removed.
摘要:
An electroless gold plating solution comprising a thiosulfato gold(I) complex, a thiosulfate, thiourea, a pH regulator and a stabilizer. The electroless gold plating solution shows a plating rate and a plating solution stability comparable to those of conventional gold plating solutions containing cyanide ions, and requires a smaller amount of reducing agent to be used therein. Further, the electroless gold plating solution is safe because it does not contain cyanide ions.
摘要:
A photo and radiation sensitive-organopolymeric material having at least one Si--Si).sub.n bond, wherein n is an integer of from 1 to 5 has a good resistance to dry etching, a good adhesion and a good heat resistance and is useful for finer patterning with a good resolution.
摘要:
A photosensitive resin composition comprising (a) 10 to 90 parts by weight of at least one polymerizable monomer of the formula: ##STR1## (R is defined in the specification), (b) 90 to 10 parts by weight of at least one compound selected from the group consisting of epoxy-acrylate resins, 1,2-polybutadiene resins, polyester resins and organopolysiloxanes, all having one or more acryloyloxy or methacryloyloxy groups in their molecular end or ends, and (c) 0.05 to 5 parts by weight of a photosensitizer based on 100 parts by weight of the sum of the components (a) and (b) shows slight shrinkage and the resulting coating film is good in adhesive properties and mechanical strength.
摘要:
An optical fiber connector comprising a pair of plugs, a sleeve and a pair of cap nuts which is assembled at the site where optical fibers are installed, so as to connect the optical fibers with a high degree of positional accuracy. The plugs and the sleeve are molded of a composition including a synthetic resin added with a suitable content of a filler, such as glass beads.
摘要:
A screen for projection television set comprising a foamed support and a reflective film adhered to the concave side of the support, said support having the outer layers with a high density such as 0.7 to 1.2 g/cm.sup.3 and the inner portion with a low density so as to make the density of the foamed support as a whole 0.2 to 0.5 g/cm.sup.3, has good projection properties, surface hardness with sufficiently strong support. When said support is foam molded by using a polyurethane having special polyol components, its heat resistance is remarkably increased and can be foam molded at high temperatures without deformation.
摘要翻译:一种用于投影电视机的屏幕,包括发泡支撑体和粘附到支撑体的凹侧的反射膜,所述支撑体具有高密度的外层,例如0.7至1.2g / cm 3,密度低的内部部分 为了使发泡载体的密度整体为0.2〜0.5g / cm 3,具有良好的投影性能,表面硬度具有足够坚固的支撑。 当所述载体通过使用具有特殊多元醇组分的聚氨酯进行泡沫模塑时,其耐热性显着增加,并且可在高温下进行泡沫模塑而不变形。
摘要:
A method of and an apparatus for molding a plastic wherein the injection pressure (transfer pressure) is switched to a holding pressure when the internal pressure of the mold cavity sensed by a pressure sensor reaches a predetermined injection pressure (transfer pressure), to initiate holding of the pressure applied to the cavity. The holding pressure is removed when the internal pressure thereof becomes zero or in accordance with the detection of a predetermined inflection point in the internal pressure which is indicative of a gate sealing point in the mold cavity or is brought to a predetermined value close to zero. The molded articles are of high precision finishes, and conservation of energy and natural resources can be achieved.
摘要:
An unsaturated polyester resin composition for use in pressure molding, which comprises an unsaturated polyester resin and fillers consisting essentially of (a) calcium carbonate powder which passes a 325 mesh sieve, (b) an inorganic mineral particulate which passes a 12 mesh sieve and is retained on a 200 mesh sieve and (c) glass fibers having a length larger than 0.2 mm, wherein the ratio by weight of (a) to (b) is within a range of from 0.3 to 10, the ratio of (a)+(b) to the unsaturated polyester resin is within a range of from 1.5 to 7, and the ratio of (c) to the total weight of the resin, calcium carbonate, silica sand and glass fiber is within a range of from 0.01 to 0.25.