Abstract: A method of continuously producing polyalkylbiphenyls involves reacting biphenyl and an olefin in the presence of a solid acid catalyst to obtain a reaction mixture containing monoalkylbiphenyls and dialkylbiphenyls, separating a fraction containing biphenyl and at least a part of the monoalkylbiphenyls, circulating the separated fraction to the reactor such that the ratio of biphenyls to monoalkylbiphenyls is designed to be 0.1 or more and is designed to be less than the soluability of biphenyl to monoalkylbiphenyl at a circulation temperature, and recovering polyalkylbiphenyls.

Abstract: A bicyclic conjugated diene polymer obtained by polymerizing a monomer (M) comprising at least one kind of bicyclic conjugated diene monomer represented by formula (I), and a bicyclic conjugated diene copolymer obtained by copolymerizing monomer (M) with at least one kind of unsaturated compound other than said monomer: wherein, R1 to R6 are the same or different and are each hydrogen, halogen, or alkyl or halogenated alkyl of 1 to 20 carbon; n and m are each an integer of from 0 to 10; X1, X2, Y1 and Y2 are the same or different from each other and are each hydrogen, halogen or alkyl or halogenated alkyl of 1 to 20 carbon; and, when m or n is 2 or more, each of mX1's, mX2's, nY1's and nY2's are the same or different.

Abstract: Diarylalkanes are prepared by alkylating an aromatic compound with a styrene derivative in the presence of a catalyst of specific synthetic porous crystalline material. The aromatic compound can be, for example, benzene, toluene, xylene, ethylbenzene, cumene, etc. The styrene derivative can be, for example, styrene, methylstyrene or the like.

Abstract: An apparatus for manufacturing a transversely aligned web has a spinning device provided with a plurality of nozzles for extruding molten polymer as filaments, and a conveyor on which the filaments spun by the spinning device are piled and traveling in a direction cross to the direction of array of the nozzles. The spinning device is provided with a high-speed fluid blowing unit for blowing a high-speed fluid in a direction parallel with a direction in which the filaments are extruded from the nozzles so as to attenuate the filaments. Further, the apparatus for manufacturing the transversely aligned web has at least one air stream vibrating mechanism for cyclically changing the flowing direction of the high-speed fluid blown from the high-speed fluid blowing unit in a direction cross to the machine direction of the conveyor. The filaments are vibrated in a direction cross to the machine direction of the conveyor, owing to the high-speed fluid by the air stream vibrating unit.

Abstract: This invention provides a web expander comprising means for carrying a web 2 having longitudinal slits, means 5 for expanding the width of the web, and opening control means 6 for uniformly forming size and form of openings of the web expanded by said means for expanding. The means 5 for expanding the width consists of a flat expander 15 and two pairs of cloth guider 21, and opening control means 6 comprises two expander rolls 31 as a rotatable ribbed roll, the ribbed roll being adapted to be applied to one side of the traveling net-like web to rotate in the direction in which the net-like web 2 is reduced in width.

Abstract: The present invention relates to an apparatus for producing a transversely aligned web having filaments aligned in the transverse direction, comprising conveyor running in one direction, spinning nozzle disposed above the conveyor, an annular primary airflow nozzle, and at least one pair of secondary airflow nozzles disposed on the upstream side and the downstream side of the running direction of the conveyor.

Abstract: A composite sheet comprises a nonwoven fabric and a rubber elastic material bonded onto the nonwoven fabric. The nonwoven fabric has nonelastic fibers aligned in one direction and has elongation of 100% or higher in a direction perpendicular to the aligned direction of the nonelastic fibers. The rubber elastic material is bonded to the nonwoven fabric in a pattern having orientation perpendicular to the aligned direction of the nonelastic fibers.

Abstract: A laminated structural body is manufactured by laminating unidirectionally arranged strands and a web such that two layers of the web sandwich the strands therebetween. A cylindrical web is delivered in a direction parallel to a central axis thereof. A polymer liquid is discharged from a spinning head, which is disposed in the cylindrical web and rotated about the central axis of the cylindrical web, toward an inner surface of the cylindrical web to spin strands of the discharged polymer liquid. The spun strands are arranged in a direction substantially parallel to the circumferential direction of the cylindrical web and laminated on the inner surface of the cylindrical web. The cylindrical web with the strands laminated thereon is folded flatwise to sandwich the strands between the two folded layers of the web.

Abstract: This invention provides a web expander comprising means for carrying a web 2 having longitudinal slits, means 5 for expanding the width of the web, and opening control means 6 for uniformly forming size and form of openings of the web expanded by said means for expanding. The means 5 for expanding the width consists of a flat expander 15 and two pairs of cloth guider 21, and opening control means 6 comprises two expander rolls 31 as a rotatable ribbed roll, the ribbed roll being adapted to be applied to one side of the traveling net-like web to rotate in the direction in which the net-like web 2 is reduced in width.

Abstract: A transversely stretched nonwoven fabric is manufactured by transversely stretching a nonwoven fabric. First, an original web comprising a plurality of un-oriented filaments is heated to a temperature higher than its stretch suitable temperature by 5° C. or more. Next, the heated original web is stretched at a rate of 1.2 to 3 in its transverse direction to stretch the filaments of the original web with almost no molecular orientation involved. Then, the original web stretched transversely at a rate of 1.2 to 3 is heated to the stretch suitable temperature and the original web is further stretched transversely at the stretch suitable temperature. With these steps, a transversely stretched nonwoven fabric in which the original web is stretched transversely at a rate of 7 times or more in total as compared with the state of the stretch thereof is manufactured with a high tensile strength of 132.5 mN/tex (1.5 g/d) in the transverse direction.

Abstract: Diarylalkanes are prepared by alkylating an aromatic compound with a styrene derivative in the presence of a catalyst of specific synthetic porous crystalline material. The aromatic compound can be, for example, benzene, toluene, xylene, ethylbenzene, cumene, etc. The styrene derivative can be, for example, styrene, methylstyrene or the like.

Abstract: To provide a hydrocarbon resin for improving rubber compositions, wherein the hydrocarbon resin has improved durability, abrasion resistance, stretch, and productivity, while retaining puncturing strength and tear strength of vulcanized rubber products such as tires and the like; and to also provide a rubber composition comprising the hydrocarbon resin, or vehicle tire obtained from the rubber composition,

Abstract: An apparatus for manufacturing a nonwoven fabric has a spinning mechanism having a plurality of nozzles for extruding filaments, and a conveyor for collecting and delivering the extruded filaments. Between the spinning mechanism and the conveyor, there are disposed a high-speed air stream generating mechanism for generating a high-speed air stream to carry the filaments extruded from the nozzles to attenuate the filaments, and an air stream vibrating mechanism for periodically changing the direction of the high-speed air stream in the machine direction of the conveyor.

Abstract: A transversely stretched nonwoven fabric is manufactured by transversely stretching a nonwoven fabric. First, an original web comprising a plurality of un-oriented filaments is heated to a temperature higher than its stretch suitable temperature by 5° C. or more. Next, the heated original web is stretched at a rate of 1.2 to 3 in its transverse direction to stretch the filaments of the original web with almost no molecular orientation involved. Then, the original web stretched transversely at a rate of 1.2 to 3 is heated to the stretch suitable temperature and the original web is further stretched transversely at the stretch suitable temperature. With these steps, a transversely stretched nonwoven fabric in which the original web is stretched transversely at a rate of 7 times or more in total as compared with the state of the stretch thereof is manufactured with a high tensile strength of 132.5 mN/tex (1.5 g/d) in the transverse direction.

Abstract: The method for producing diarylmethane and its derivatives by condensation of an aromatic hydrocarbon and a methylenating agent is proposed, in which the aromatic hydrocarbon having at least one hydrogen atom that is directly connected to its benzene ring and a methylenating agent such as formalin are reacted in a specific temperature range in the presence of a heteropoly-acid of the condensation product of at least one oxide selected from the group of Mo, W, Nb and V with an oxyacid of P, Si, As or Ge.

Abstract: The present invention relates to a method of producing a transversely aligned web comprising the steps of extruding melted resin from a spinning nozzle to direct the metal resin downward, blowing off a primary airflow at a high temperature and at high velocity from an annular primary airflow nozzle, blowing off a pair of secondary airflows at a high temperature from a pair of secondary airflow nozzles, colliding with the pair of airflow blown off from the pair of secondary airflow nozzles each other below the spinning nozzle, spreading the colliding secondary airflow at least partly in the width direction of the conveyor, and piling on the conveyor the spun filaments so that transversely aligned web is formed of the filaments which are aligned in the width direction of the conveyor.

Abstract: An apparatus for manufacturing a transversely aligned web has a spinning device provided with a plurality of nozzles for extruding molten polymer as filaments, and a conveyor on which the filaments spun by the spinning device are piled and traveling in a direction cross to the direction of array of the nozzles. The spinning device is provided with a high-speed fluid blowing unit for blowing a high-speed fluid in a direction parallel with a direction in which the filaments are extruded from the nozzles so as to attenuate the filaments. Further, the apparatus for manufacturing the transversely aligned web has at least one air stream vibrating mechanism for cyclically changing the flowing direction of the high-speed fluid blown from the high-speed fluid blowing unit in a direction cross to the machine direction of the conveyor. The filaments are vibrated in a direction cross to the machine direction of the conveyor, owing to the high-speed fluid by the air stream vibrating unit.

Abstract: The present invention relates to a process for the preparation of tetracyclododecenes, which can be a raw material of cycloolefin (co)polymers possessing excellent characters concerning their optical property, high transparency, heat resistance, and oil absorbency, from an inexpensive raw material of crude DCPD in a stable, continuous, and longstanding process. In the continuous preparation of tetracyclododecenes described in the present invention, it is possible to produce the targeted product in high efficiencies in the effective utilization of the raw materials exemplified by the separation and recovery of 2-norbornenes after the reaction. It is also possible to maintain a stable, continuous, and longstanding operation based on the suppression of ill effects deriving from the accumulation of byproducts such as 2-methyl-2-norbornenes, which easily creep into the circulating 2-norbornenes, by removing at least a part of said products from the reaction system.

Abstract: A vapor-permeable and water-resistant sheet is provided with a film layer having vapor permeability and water-resistance, a spun bonded nonwoven fabric laminated onto one surface of the film layer and a reinforcement layer laminated onto the other surface of the film layer. The basis weight of the spun bonded nonwoven fabric is 20 g/m2 through 70 g/m2. The reinforcement layer has a reticular construction, and thus does not deteriorate vapor permeability and water-resistance of the film layer.

Abstract: The present invention relates to a process for the preparation of highly purified tetracyclododecenes, which can be a raw material of cycloolefin (co)polymers possessing excellent characters concerning their optical property, high transparency, heat resistance, and oil absorbency, from an inexpensive raw material of crude DCPD in a stable, continuous, and longstanding process. In the continuous preparation of tetracyclododecenes described in the present invention, it is possible to employ crude dicyclopentadiene, that is, dicyclopentadiene having low purity, as a raw material. It is also possible to produce highly purified tetracyclododecenes by maintaining the ratios of one, two, or three compounds selected from the group comprising isoprene, piperylene, and 1-methyl-2-norbornenes shown by the general formula (4) against the sum of dicyclopentadiene and cyclopentadiene within the specified ranges, wherein all these substances are contained in the raw material that are fed into a reactor.