Abstract:
A coated triaxial fabric, a process for its preparation and a laminated article prepared therefrom are provided. The coated fabric comprises a triaxial fabric, such as glass or polyester fibers, having a polymeric material impregnating and coating the fabric in an amount sufficient to set the yarn courses of the fabric where they cross one another and to give such a coated fabric superior isotropic tear resistance and strength (substantially uniform in all directions) when compared to a similarly constructed coated fabric prepared from a conventional biaxial fabric or a conventional bias ply construction. The coated fabric can be bonded to substrates such as metals and polymeric films.
Abstract:
Nonwoven fabrics of enhanced resistance to shrinkage, degradation, and planar instability at elevated temperatures are prepared from a major portion of aramid fibers bonded by a minor portion of polyamide fibers.
Abstract:
Unclad and metal clad laminates are constructed by sandwiching a resin impregnated core of paper between epoxy resin impregnated woven glass fabric sheets. The paper is a water laid sheet of cellulose fibers, preferably wood cellulose or cotton linter fibers having an average length from about 0.5 to 5 mm. The laminates are used as substrates for printed circuits and printed circuit modules.
Abstract:
A laminated board formed of a core of pressed wood covered with preferably aluminum foil outer layers, adhesively bonded thereto, which is useful for a back-up board when drilling printed circuit boards which is formed by drying the pressed fiber core to a low moisture contest prior to adhesively bonding the aluminum foil thereto.
Abstract:
The present invention provides a resin composition comprising: 1 to 20 parts by weight of a reinforcing fiber; 0.2 to 5 parts by weight of an anti-settling agent; 20 to 40 parts by weight of an epoxy resin; 0.1 to 3 parts by weight of a curing agent; and 50 to 75 parts by weight of a high dielectric constant filler. The present invention further provides a dielectric layer produced from the resin composition and a capacitor comprising the dielectric layer. In the dielectric layer made from the resin composition provided by the present invention, the fibers can be evenly dispersed and can enhance the mechanical strength of the resin composition, and cooperate with the epoxy resin to bring excellent toughness. Therefore, the mechanical strength of the produced dielectric layer can be remarkably improved, and its fragility can be effectively overcome when the dielectric layer is used in the PCB double-side etching process.
Abstract:
A film material includes a substrate and a film layer arranged on one main surface of the substrate. The film layer contains a fibrous first resin and a thermosetting second resin in an uncured or semi-cured state, and a linear expansion coefficient CF of the first resin is smaller than a linear expansion coefficient CR of the second resin in cured state.
Abstract:
Provided is a thermoplastic resin molded article excellent in bending strength, flexural modulus and Charpy impact strength, on which the plated layer may be formed in a successful manner. The thermoplastic resin composition for laser direct structuring comprising, per 100 parts by weight of the thermoplastic resin, 10 to 150 parts by weight of an inorganic fiber and 1 to 30 parts by weight of a laser direct structuring additive, the laser direct structuring additive containing at least one of copper, antimony and tin, and having a Mohs hardness 1.5 or more smaller than the Mohs hardness of the inorganic fiber.
Abstract:
An insulating composition including a graphene oxide and an insulating material including the same; and a polar solvent having a solvent polarity index (P) of greater than 5.5, a substrate including an insulating layer using the same, and a method for manufacturing the substrate. It is possible to provide an insulating composition including a specific solvent that can secure dispersibility of the graphene oxide while including the graphene oxide having excellent insulating and mechanical properties as an insulating material. Further, it is possible to provide a substrate including a fine insulating layer pattern as well as a bulk insulating layer pattern by using the insulating composition to overcome an aggregation problem in a conventional inkjet printing method.
Abstract:
A method of manufacturing an insulating sheet, a method of manufacturing a copper clad laminate, and a method of manufacturing a printed circuit board, as well as a printed circuit board manufactured using these methods are disclosed. The method of manufacturing an insulating sheet can include: forming a thermoplastic reinforcement material, which includes fibers secured by a thermoplastic polymer binder, and in which pores are formed; forming a thermoplastic resin layer such that the thermoplastic reinforcement material is impregnated with a thermoplastic resin; and hot pressing the thermoplastic reinforcement material and the thermoplastic resin layer. This method can be utilized to manufacture an insulating sheet, which has a low rate of moisture absorption and superb electrical properties, including a low dielectric constant (Dk) and low dielectric loss (Df), and in which the fibers can readily be impregnated with the resin.