摘要:
Provided are a propylene resin composition comprising 100 parts byweight in total of two different types of propylene polymers each having specific properties, from 0 to 50 parts by weight of a specific elastomer, and from 0 to 50 parts by weight of an inorganic filler; and a method for producing it. The production method comprises melting and kneading two polymer groups each comprising one or more propylene polymers. The resin composition in which the viscosity difference between the propylene homopolymer segments to form the base polymer and the amorphous propylene segments to form the disperse phase is small is produced by first melting and kneading one polymer group, then immediately adding the other polymer group thereto, and further kneading and melting the two. For the composition in which the viscosity difference therebetween is large, the polymer groups are separately kneaded in melt, and the resulting melts are further kneaded. The propylene resin composition has high stiffness, high impact resistance and high fluidity, and its moldings have good appearances.
摘要:
A cooling system for radiator and condenser with an air conditioner having first and second electrically driven blowers for cooling the radiator and condenser, and a cooling cycle operation switch which comprises a control circuit provided on at least one side of the first and second blowers for either stopping or operating at low speed the one of the first and second blowers when any electrical equipment of vehicle such as headlights, wipers, is operated during the cooling cycle, an engine cooling water temperature switch operative to turn on and off the first blower by releasing the control of the control circuit when any of the electrical equipments is operated, and/or a thermal load switch operative to turn of and off the second blower in accordance with the outside temperature conditions by releasing the control of the control circuit, when any of the electrical equipments is operated. With this construction, the blowers for the radiator and condenser can be efficiently operated in accordance with the conditions of the engine cooling water temperature, the outdoor temperature, and the operated or non-operated conditions of the electrical equipments of a vehicle, so as to save electrical power generated by a generator or batteries of the vehicle.