摘要:
The present invention provides a thermoplastic polyester resin composition, which exhibits stable processability in extrusion molding, blow molding and calender molding, particularly in profile extrusion and extrusion molding of boards and pipes, by efficiently enhancing melt viscosity of thermoplastic polyester resin, and gives a molded article having favorable surface properties and excellent impact strength. By compounding (B) 0.1 to 50 parts by weight of a viscosity modifier for thermoplastic polyester resin comprising (a) 3 to 95% by weight of alkyl(meth)acrylate containing an epoxy group, (b) 5 to 97% by weight of another alkyl(meth)acrylate and (c) 0 to 92% by weight of another vinyl monomer copolymerizable therewith, and having weight average molecular weight of 1,000 to 400,000; and (C) 1 to 50 parts by weight of a core-shell graft polymer, based on (A) 100 parts by weight of thermoplastic polyester resin, stable processability is exhibited in extrusion molding and a molded article having favorable surface properties and excellent impact strength is obtained.
摘要:
0.1 to 50 parts of a viscosity modifier for thermoplastic polyester resin comprising (a) 15 to 95% by weight alkyl (meth)acrylate containing an epoxy group, (b) 5 to 85% by weight of another alkyl (meth)acrylate and (c) 0 to 80% by weight of another vinyl monomer copolymerizable therewith and having weight average molecular weight of 1,000 to 400,000 is compounded, based on 100 parts by weight of a thermoplastic polyester resin. As a result, melt viscosity of thermoplastic polyester resin can be efficiently improved, stable processability is exhibited in extrusion molding, blow molding and calender molding, particularly profile extrusion and extrusion molding of boards and pipes which are extremely difficult, and a molded article having favorable surface properties is obtained.
摘要:
Provided is a circuit device that allows a plurality of circuit boards, which are stacked each other and arranged in a case member, to be sealed with a resin effectively, and a method of manufacturing the same. In a hybrid integrated circuit device, a first circuit board is overlaid with the second circuit board and both of the boards are fitted into the case member. A first circuit element is arranged on the upper surface of the first circuit board and a second circuit element is arranged on the upper surface of the second circuit board. Furthermore, an opening is provided in a side wall part of the case member, and an internal space of the case member communicates with the outside through this opening. Accordingly, in the resin sealing step, a sealing resin can be injected into the internal space of the case member from the outside through this opening.
摘要:
Provided is a circuit device capable of increasing the packaging density and preventing the thermal interference between circuit elements to be incorporated. In a hybrid integrated circuit device, a first circuit board and a second circuit board are fitted into a case member in a way that the first circuit board is overlaid with the second circuit board. A first circuit element is arranged on the upper surface of the first circuit board and a second circuit element is arranged on the upper surface of the second circuit board. Furthermore, inside the case member, provided is a hollow portion that is not filled with a sealing resin. Such a configuration prevents the second circuit element, which is a microcomputer, from operating unstably due to a heat generated in the first circuit element, which is a power transistor, for example.
摘要:
Provided is a circuit device capable of increasing the packaging density and preventing the thermal interference between circuit elements to be incorporated. In a hybrid integrated circuit device, a first circuit board and a second circuit board are fitted into a case member in a way that the first circuit board is overlaid with the second circuit board. A first circuit element is arranged on the upper surface of the first circuit board and a second circuit element is arranged on the upper surface of the second circuit board. Furthermore, inside the case member, provided is a hollow portion that is not filled with a sealing resin. Such a configuration prevents the second circuit element, which is a microcomputer, from operating unstably due to a heat generated in the first circuit element, which is a power transistor, for example.
摘要:
To provide a hybrid integrated circuit device in which the rear surface of a circuit board is exposed to the outside and a method of manufacturing the same. Here, leads are fixed to the surface of the circuit board along one side thereof. A method of manufacturing a hybrid integrated circuit device includes the steps of forming an electric circuit which includes a conductive pattern formed on a surface of a circuit board and a circuit element electrically connected to the conductive pattern, fixing a lead to a pad formed of the conductive pattern, housing the circuit board in a cavity of molds, and fixedly supporting the lead by clamping the lead between the molds, and performing sealing by filling inside of the cavity with sealing resin with the rear surface of the circuit board made in contact with an inside bottom surface of the molds.
摘要:
Provided is a circuit device in which encapsulating resin to encapsulate a circuit board is optimized in shape, and a method of manufacturing the circuit device. A hybrid integrated circuit device, which is a circuit device according to the present invention includes a circuit board, a circuit element mounted on a top surface of the circuit board, and encapsulating resin encapsulating the circuit element, and coating the top surface, side surfaces, and a bottom surface of the circuit board. In addition, the encapsulating resin is partly recessed and thereby provided with recessed areas at two sides of the circuit board. The providing of the recessed areas reduces the amount of resin to be used, and prevents the hybrid integrated circuit device from being deformed by the cure shrinkage of the encapsulating resin.
摘要:
To improve reliability of a circuit module by improving heat release performance and minimizing thermal influence on a device to be mounted, a base substrate having a first substrate mounted thereon is fitted into a lower portion of casing member, and a second substrate is installed in the upper portion of the casing member so that a spaced area can be provided. In addition, a drive device to be installed on the second substrate is positioned off the center of the second substrate.
摘要:
An automotive air tempering apparatus for use in an automotive vehicle having a duct through which air is directed into a passenger compartment. The apparatus comprises an air chilling unit including an evaporator provided in the duct and a compressor having a displacement variable for supplying a controlled amount of refrigerant to the evaporator for chilling the air in the duct. A control unit controls the displacement of the compressor to bring the refrigerant temperature to a target value when air is introduced into the duct from the atmosphere. The control unit controls the displacement of the compressor to bring the chilled air temperature to a target value when air is introduced into the duct from the passenger compartment.