摘要:
A propylene block copolymer, a process for preparation of the propylene block copolymer, and a propylene resin composition comprising the propylene block copolymer. The propylene block copolymer comprises (a) from 35 to 95% by weight of a polypropylene block and (b) from 10 to 65% by weight of a block of a copolymer of a propylene and other .alpha.-olefins, the propylene block copolymer having: (i) in a crystallization temperature curve determined by a differential scanning calorimeter, besides a main peak, secondary peaks in a temperature range of from 90.degree. to 100.degree. C., and a proportion of the area of the secondary peaks to that of a main peak of from 1.5 to 10%; and (ii) a relationship between an amount of a soluble content on xylene extraction at 25.degree. C. and a proportion of the area of the secondary peaks to that of the main peak represented by equation (I): 0.1X.sub.IS -1.ltoreq.SMA (I) wherein X.sub.IS represents an amount of a soluble content on xylene extraction at 25.degree. C. in terms of percent by weight; and SMA represents a proportion of the area of the secondary peaks to that of the main peak in terms of percent.
摘要:
A polyolefin composition, which comprises: (A) 1 to 99% by weight of a polyolefin having the following properties of (a) to (e); (a) a ratio of kinematic viscosity .eta..sub.1 at a frequency of 10.sup.-1 rad/sec to kinematic viscosity .eta..sub.2 at a frequency of 10 rad/sec at a temperature of 190.degree. C. according to a kinematic viscoelasticity determination method of 4 to 20, (b) a crystallization peak temperature Tcp according to a Differential Scanning Calorimetry of 110.degree. C. to 130.degree. C., (c) a ratio (Tmp/Tcp) of melting peak temperature Tmp to crystallization peak temperature Tcp according to a Differential Scanning Calorimetry of 1.1 to 1.5, (d) Tmp/(Tmp-Tcp)=3.0 to 9.8, and (e) a crystal structure exhibiting a-axial orientation in a diffraction pattern according to a X-ray diffraction method, and (B) 99 to 1% by weight of a propylene resin having the following properties of (f) and (g); (f) a ratio of kinematic viscosity .eta..sub.1 at a frequency of 10.sup.-1 rad/sec to kinematic viscosity .eta..sub.2 at a frequency of 10 rad/sec at a temperature of 190.degree. C. according to a kinematic viscoelasticity determination method of below 4, and (e) and no crystallization structure exhibiting a-axial orientation in a diffraction pattern according to a X-ray diffraction method.
摘要:
A propylene block copolymer comprising: (a) a propylene homopolymer part having (i) an insoluble amount on xylene extraction at 25.degree. C. of 99.0% by weight or more; (ii) an isotactic pentad fraction of 98.0% or more; (iii) an isotactic average chain length of 500 or more; and (iv) a total amount of fractions having an isotactic average chain length of 800 or more obtained in a column chromatographic separation of 10% by weight or more, and (b) a copolymer part comprising propylene and at least one of ethylene and an .alpha.-olefin having from 4 to 12 carbon atoms, the proportion of the propylene homopolymer part (a) being from 50 to 97% by weight based on the total amount of the propylene homopolymer part (a) and the copolymer part (b), and the proportion of the copolymer part (b) being from 3 to 50% by weight based on the total amount of the propylene homopolymer part (a) and the copolymer part (b).
摘要:
There is provided a stator yoke capable of improving magnetic characteristics and a rust-proofing effect of a stator yoke produced by using a Fe-Cr type alloy. When a stator yoke is produced by using a Fe-Cr type alloy, its magnetic characteristics can be improved, but when press working is made to obtain a predetermined shape, the magnetic characteristics drop. Annealing is carried out so as to recover the magnetic characteristics. This annealing generates the property change of a surface layer and a rust-proofing effect lowers.
摘要:
An oil suction device for an automatic transmission includes: an oil pan that receives oil supplied to various portions of the automatic transmission and returned to the oil pan and reserves the received oil therein; an oil strainer located over the oil pan; a suction port drawing in the oil reserved in the oil pan; and an elastic wall provided selectively between a portion of the oil pan that receives a relatively small amount of the oil returned to the oil pan and the suction port, the elastic wall extending from a bottom surface of the oil pan and reaching a lower surface of the oil strainer to interrupt a flow of oil.
摘要:
A control system of a vehicle including an engine and an automatic transmission operable to form one of a plurality of gear positions set according to running conditions of the vehicle, and a method of controlling the vehicle are provided. In the control, the rotational speed of an input-side rotary shaft of a shifting mechanism of the transmission is detected, and the vehicle is controlled so that, when an execution condition that one of the gear positions set according to the running conditions is maintained and the rotational speed of the input-side rotary shaft has increased to be higher than a rotational speed corresponding to the set gear position is satisfied, the vehicle is brought into running conditions that will eliminate a state in which air is present in the hydraulic fluid supplied from an oil supply device.
摘要:
An ECU executes a program including causing a brake to enter an engaged state, when first gear is implemented and when a difference between an output shaft rotation speed estimated from an input shaft rotation speed and a detected output shaft rotation speed is greater than a threshold value. When the brake enters the engaged state, the relative rotation between the inner race and the outer race of a one-way clutch is limited.
摘要:
An ECU executes a program including causing a brake to enter an engaged state, when a first gear is implemented and when a difference between an output shaft rotation speed estimated from an input shaft rotation speed and a detected output shaft rotation speed is greater than a threshold value. When the brake enters the engaged state, the relative rotation between the inner race and the outer race of a one-way clutch is limited.
摘要:
A wiring material is provided by electrically connecting a connecting terminal with two single line conductors arranged in parallel. The connecting terminal is provided with a tube-shaped section for storing two single line conductors, the two single line conductors are inserted into the tube-shaped section, resistance welding is performed by carrying electricity from the external of the tube-shaped section in a status where the tube-shaped section and the single line conductors are mutually brought into contact, and the connecting terminal is electrically connected with the two single line conductors.
摘要:
An embodiment of a differential device of the present invention comprises a pair of side gears and a pair of pinion gears housed inside a differential case, with the pinion gears supported by a pinion shaft fixed to the differential case at axial end sections thereof so as to be capable of sliding freely thereabout. Lubricating oil channels are provided that pass through each of the end sections of the pinion shaft in the axial direction thereof. One end of each lubricating oil channel opens to the exterior of the differential case at a shaft-end corner section of the pinion shaft corresponding to an upstream side thereof in a direction of rotation of the differential case, and another end opens to a sliding surface of the pinion shaft with respect to one of the pinion gears. The differential device also comprises a mechanism for providing lubricating oil to the lubricating oil channels upon rotation of the differential case.