Abstract: A pneumatic tire having a low air permeability, an improved fatigue resistance and a low fuel consumption is disclosed, which comprises an inner liner made of a vulcanizate of a rubber composition comprising 3-30 parts by weight of micro organic short fibers and 10-100 parts by weight of carbon black on a basis of 100 parts by weight of a rubber blend consisting mainly of butyl rubber and/or halogenated butyl rubber; said micro organic short fiber consisting of an amorphous portion having a glass transition temperature of less than 30.degree. C. or more than 120.degree. C. and a crystal portion having a melting point of not less than 160.degree. C., and having an average length of 0.8-30 .mu.m, an average diameter of 0.02-0.8 .mu.m and a ratio of average length to average diameter of 8-400.

Abstract: A process for producing urethane-modified polyisocyanurate foams in which a poly(oxyalkylene-oxyethylene)polyether polyol is used as a modifying agent having the number of functional groups and the molecular weight in specific ranges with the equivalent ratio of NCO/OH being in a specific range and containing a specific quantity of ethylene oxide. The use of this modifying agent provides urethane-modified polyisocyanurate foams exhibiting excellent fire resistance and adhesion to an object surface.

Abstract: There is disclosed a rubber composition having excellent vibration-insulating properties. The rubber composition comprises 45 to 75 parts by weight of at least one rubber selected from the group consisting of natural rubber, isoprene rubber, butadiene rubber and styrene-butadiene rubber; 40 to 20 parts by weight of halogenated butyl rubber; 5 to 15 parts by weight of copolymer having a styrene content of not less than 50%; 20 to 80 parts by weight of carbon black based on 100 parts by weight of the total of the above rubbers and copolymer; and 3 to 25 parts by weight of aromatic process oil based on 100 parts by weight of the total of the above rubbers and copolymer.

Abstract: An apparatus for loading unvulcanized tires on a tire vulcanizing machine of the sort which has a vertically movable loader arm with a contractibly expansible paddle at the fore end thereof, an oscillating cylinder cooperative with a movable arm for oscillating the loader arm in a horizontal plane, and a stand-by station for temporarily holding unvulcanized tires to be loaded on the vulcanizing machine, the loader arm being adapted to load the unvulcanized tires one after another in a mold on the machine by lifting, oscillating and paddle-expanding operations. The loading apparatus is characterized by the provision of a plural number of stand-by stations on a locus of oscillatory movement of one loader arm, and a plural number of oscillating cylinders cooperative with a corresponding number of movable arms for oscillating the loader arm between the center of the mold and a selected one of the stand-by stations.

Abstract: A rubber composition for tire having low rolling resistance and high wet skid resistance, breakage strength and wear resistance consists mainly of a rubber component containing at least 20 parts by weight of a high vinyl butadiene-styrene copolymer rubber obtained by copolymerizing randomly styrene with 1,3-butadiene, and containing 3-30% by weight of bonded styrene and 60-95% by weight of 1,2-bond in butadiene unit, and further containing metal-butadienyl bonds in its main chain in a weight fraction of at least 20% by weight.

Abstract: A pneumatic bias tire for off-road vehicles is disclosed. This tire comprises a bias-structured carcass composed of plural plies each containing organic fiber cords embedded in rubber. In the carcass, the inner plies located near the inner surface of the tire have a rubberized cord arrangement of a more slackened state as compared with the outer plies and further medium plies existent between the inner and outer plies.

Abstract: An adhesive consisting comprising an alkoxyphenol derivative/resorcin derivative/formaldehyde cocondensate has a high adhesive strength and can bond firmly polyester fibrous material with rubber.

Abstract: A pneumatic radial tire having a reduced rolling resistance and particularly suitable for a passenger car, comprising a toroidal carcass, a belt layer, a bead core, a side rubber, a tread rubber, a relatively thin base rubber, and a rubber filler, wherein provision is made of a stress relieving groove composed of a depression facing toward the bead rubber at a position near the joint portion between the side rubber and the tread rubber, the base rubber having a resilience which is higher than those of the tread rubber and the bead rubber.

Abstract: A pneumatic radial tire for heavy load vehicles comprising a body reinforcement and a bead portion reinforcement, in which the bead portion reinforcement substantially continuously covers the carcass ply wound around a bead core up to the inside of the tire, the upper end of the turn-up portion of the carcass ply and the outside upper end of the bead portion reinforcement covering the upper end of the carcass ply are arranged at an area other than a bead portion flexible region defined by two segments BC and AD as shown in attached FIG. 3, the bead portion reinforcement makes use of a cord having a modulus which corresponds to 15 to 60% of that of the ply cord of the carcass, and a tension at 100% elongation of a soft stiffener corresponds to 5 to 30% of that of a hard stiffener, the soft and hard stiffeners being disposed on the bead core one upon the other.

Abstract: A heavy duty pneumatic radial tire having a high resistance against separation of belt end portion and separation of turn-up end of carcass ply in the beak portion is disclosed. This tire has a particularly limited carcass line defined by (1) the height of the intersecting point of a radial line, which contacts with the carcass in the inside of the bead core, with the carcass from a base line, which passes through the center of the bead core in a direction parallel to the rotation axis of the tire, (2) the maximum width of the carcass, (3) the vertical distance of the maximum width point of the carcass from the base line, and (4) the distance of the maximum width point of the carcass from the radial line.

Abstract: An outer heat insulating structure on a building roof comprises a plurality of covering layer panels provided with a heat insulating layer and female screw members secured at corner portions in the covering layer panel in alignment with through-apertures provided therein with threaded rods capable of being threadedly engaged with the female screw members. Rubbery elastic members are arranged on a waterproof layer provided on the building roof and members which are secured to the rubbery elastic members and support rotatably lower ends of the threaded rods. A heat insulating layer is defined between the covering layer panel and the waterproof layer.

Abstract: A heavy duty pneumatic tire having a tread provided on its outer surface with a plurality of circumferential grooves is disclosed. At least one of the circumferential grooves is opened on the tread surface at an open groove width corresponding to 2-8% of tread transverse width, has a groove bottom width substantially equal to the open groove width, and is provided on its groove bottom with plural protrusions separated from the opposed groove walls and at an interval between the adjoining protrusions in the circumferential direction of the groove.

Abstract: A giant radial tire for off-road vehicles which is obliged to be used under heavy load and which is provided with a highly durable bead portion construction in which that end of the wire cords of the turn-up portion or reinforcing layer which is located below the maximum width position of the tire and disposed outside the bead core is arranged at the position which is higher than the height h of the rim flange of a bead portion mounting rim but lower than the height which is three times higher than the above height h, and the outer coating rubber of the bead portion has a thickness distribution satisfying the following condition given by0.30.ltoreq.(B.multidot.C/A.sup.2).times.(RW/SW).ltoreq.0.55whereRW is a width between bead legs of the tire mounted on the rim,SW is a maximum width between side portions of the tire mounted on the rim,A is a bead portion reference width,B is a minimum thickness of the rubber at the bead portion, andC is a maximum thickness of the rubber at the bead portion.

Abstract: A pneumatic tire for a high speed under a heavy load is disclosed. In order to effectively refrain a crown radius of curvature of the tire from decreasing due to a centrifugal force, the tire is constructed as follows. The tire comprises a case reinforcing layer composed of a plurality of carcass plies mainly formed of organic textile cords inclined at an angle of at most 45.degree. to the circumferential direction of the tire and a plurality of reinforcing fabrics whose material and inclined angle to the circumferential direction of the tire are substantially the same as those of the cords of the carcass ply and interposed between the carcass plies. The plurality of reinforcing fabrics extend from those positions which are distant apart from one of bead portions through a tire crown portion and terminating at those positions which are distant apart from the other bead portion. The number of the reinforcing fabrics is at least 20% of the total number of both the carcass plies and the reinforcing fabrics.

Abstract: An improved golf ball having a thread-wound central core and an outer cover is provided. The outer cover is composed of a composition comprising (a) at least one ionomer which is a copolymer of at least one .alpha.-olefin and at least one .alpha.,.beta.-unsaturated carboxylic acid to which copolymer at least one metal ion selected from the group consisting of monovalent, divalent and trivalent metal ions is added and (b) at least one polyester elastomer, the content, in said composition, of said polyester elastomer being 50% by weight or less. This golf ball has excellent cutting resistance, "click" characteristics and impact resilience.

Abstract: A method of preparing a nitrile rubber composition having modulus and excellent physical properties and abrasion resistance is disclosed. This composition is prepared by kneading at 120.degree.-160.degree. C. (a) a nitrile rubber, (b) an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, (c) a divalent metal compound, (d) a secondary aryl amine, cooling the kneaded mass below 100.degree. C., adding to the kneaded mass (e) an organic peroxide, and heating and curing the resulting mixture at 110.degree.-180.degree. C. The addition of the secondary aryl amine considerably improves the physical properties of the composition. These compositions have not a tendency of scorching and are superior in the workability as compared with conventional carboxylated nitrile rubber compositions produced by emulsion polymerization.

Abstract: A shock absorbing device for a tugboat is disclosed. This device comprises a main cushion member having a close-fitting contact end opposed to a broadside of a vessel and an auxiliary cushion member having a close-fitting contact end projected over the contact end of the main cushion member toward the broadside, which are secured to a face plate disposed on a deck end of the tugboat.

Abstract: Vulcanized rubber is decomposed by treating 100 parts by weight of vulcanized rubber with a solution containing 1-30 parts by weight of a diacyl peroxide having decomposition temperature of 90.degree. C. or below and at least one member capable of swelling vulcanized rubber selected from the group consisting of solvents and radical-polymerizable monomers.

Abstract: A safety fuel tank for automobiles and the vehicles, wherein substantially skeletal reticulated flexible polyurethane foam is integrally foamed, is produced by reacting a mixture of (a) poly(oxypropylene-oxyethylene)polyetherpolyol having 51-98% by weight of ethylene oxide component and (b) poly(oxypropylene-oxyethylene)polyetherpolyol having not less than 51% by weight of propylene oxide component as the polyhydroxyl compound with an organic polyisocyanate in the presence of a catalyst, a foaming agent, a surfactant and an additive in a fuel tank.