摘要:
A polyolefin resin composition comprising (A) a polyolefin resin, (B) a graft-modified .alpha.-olefin copolymer grafted with an unsaturated carboxylic acid and its derivative, and (C) an amino group-containing compound, (D) said polyolefin resin composition containing a crosslinked structure between the amino group-containing compound (C) and the graft-modified .alpha.-olefin copolymer (B), and containing, based on 100 parts by weight of the polyolefin resin (A) and the graft-modified .alpha.-olefin copolymer (B) in total, 1 to 99 parts by weight of each of the polyolefin resin (A) and the graft-modified .alpha.-olefin copolymer (B) and 0.01 to 10 parts by weight of the amino group-containing compound (C). The polyolefin resin composition gives a crosslinked molded article having impact resistance at ordinary temperature and a low temperature.
摘要:
A poly 4-methyl-1-pentene resin composition which includes a polymer containing 80% by mass or more of 4-methyl-1-pentene in which the resin composition has a melting point of 170 to 240° C. and a semicrystallization time of 70 to 220 seconds. Also provided are a release film having good releasibility, a mold for production of a sealed electronic element product having excellent heat resistance and releasibility and an LED mold, which are obtained by molding the resin composition.
摘要:
Provided is a resin composition suitable for an optical element in which the moldability, thermal resistance, mechanical strength, and low birefringence are not impaired, the deterioration is hardly generated although the laser light nearby the UV is used, change in the optical properties during the use are extremely small, particularly the light transmittance is maintained high, and a foreign substance is hardly deposited on a surface of the molded product such as an optical element, also provided is an optical element obtained by molding the resin composition, and an optical pickup device using the optical element. The thermoplastic resin composition contains the polymer having a specific structure and two kinds of specific optical stabilizers in a specific mass ratio among a hindered amine light stabilizer having the molecular weight of 400 to 5,000; the optical element is obtained by molding the thermoplastic resin composition; and the optical pickup device includes the optical element.
摘要:
A novel olefin-based polymer has excellent thermal resistance, as well as excellent balance among various properties. The olefin-based polymer is an olefin-based polymer comprising 50 to 100% by weight of a constituent unit derived from 4-methyl-1-pentene, and 0 to 50% by weight of a constituent unit derived from at least one olefin selected from olefins having 2 to 20 carbon atoms except 4-methyl-1-pentene, and having the following properties: i) the diad isotacticity is 70% or greater, ii) the ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) as measured by gel permeation chromatography (GPC) is in the range of 1.0 to 3.5, and iii) the intrinsic viscosity [η] is 0.5 (dl/g) or greater.
摘要:
Provided is a method for producing a resin composition by melt-kneading a cyclic olefin polymer (A) having a glass transition temperature of from 60 to 200° C. and a flexible polymer (B) having a glass transition temperature of 0° C. or lower, wherein a part of the cyclic olefin polymer (A) is previously melt-kneaded with the flexible polymer (B) and a radical initiator (C) and then the remaining cyclic olefin polymer (A) is added thereto and melt-kneaded. The cyclic olefin polymer (A) is divided into two portions and added separately at two times, and accordingly, the mixture having a crosslinked structure may be diluted with the cyclic olefin polymer (A) not having a crosslinked structure, and the increase in the melt viscosity of the resin composition may be thereby prevented. A composition having good abrasion resistance and good melt shapability can be obtained.
摘要:
A film that has high rigidity and high heat resistance and good releasability from a roughened copper foil surface, which is subjected to surface oxidization or etching treatment with acid, such as a black oxidized copper foil surface and that is suitable as a release film for producing an MLB; and a process for producing the same. A drawn film having a layer (A) which comprises a copolymer that is made from 4-methyl-1-pentene and ethylene or an α-olefin, except 4-methyl-1-pentene, having 3 to 20 carbon atoms and that comprises 80% or more by mole of 4-methyl-1-pentene, the thermal coefficient of contraction of the film being 20% or more in the film-drawn direction, or the peel area of the film being 50% or more when the film, together with a copper foil surface subjected to roughening treatment, is subjected to heating and pressing treatment. This film is suitable for producing an MLB and has good releasability from the roughened copper foil surface, for example, a black oxidized copper foil surface.
摘要:
A character string retrieving circuit includes a delay circuit (10) for delaying a match/no match signal created in each clock period to indicate whether or not a character matched with a retrieval target exists in a dictionary by one clock period, creating circuits (2 (i), 3 (i), 5 (i) and 6 (i)) for creating in advance signals of two kinds of a signal (ps1 [i]) to assume that a character matched with a retrieval target exists in a dictionary in the clock period and a signal (ps0 [i]) to assume that a character matched with a retrieval target does not exist in a dictionary in the clock period as signals to predict retrieved results in a certain clock period later and a selecting circuit (4) (i) for selecting a signal with a correct assumption from the signals of 2 kinds in accordance with the match/no match signal delayed by the delay circuit (10), wherein a signal selected by the selecting circuit (4) (i) is used in the next clock period. Thus, in the character string retrieving circuit provided within a data compressing circuit using the LZ77 method, faster character string retrieval can be realized based on pipeline processing.
摘要:
Cycloolefin resin pellets of the present invention comprises a cycloolefin resin pellet and a powdery coating material and/or a liquid coating material, the melting point or the glass transition point of the coating material being 200° C. or lower, and the coating material being adhered onto the surface of the cycloolefin resin pellets, so that the molded product thereof is excellent in transparency.
摘要:
A data reproducing apparatus in which the identification information recorded in multiplicity on a recording track can be reliably reproduced assuring stable data reproduction including a decoder 61 to decode the area IDs supplied from an 8/10 demodulation circuit 43 and to supply each decoded area ID to counters C0 to C15, a system controller 70 to find the number of times of occurrences of coincidences of the area IDs of areas other than the end of data (EOD) area and, based on the frequency of detection of the occurrences of the area IDs by the counters C0 to C15, detects the area IDs of the (EOD) area. Finally, the system controller 70 controls the running of a magnetic tape 31 based on the detected area IDs.
摘要:
Fixed radio equipment serving as a base station includes a transmitter, a plurality of antennas, and a selective control circuit. The antennas are spaced apart from each other by a distance which minimizes a correlation of interferential fading. The transmitter modulates a carrier by identical signals to be transmitted during periods associated in number with the antennas and feeds the resulting bursts of the carrier time-serially to a selective control circuit. The selective control circuit delivers one of the successive bursts of the carrier fed from the transmitter to one of the antennas and then delivers another burst following the above-mentioned burst to another one of the antennas. Mobile radio equipment or station has a single antenna for receiving the identical signals transmitted time-serially from the base station. The mobile station selects and outputs either one of the received signals which has higher quality than the other.