Abstract: A wound golf ball includes a liquid center consisting of a center bag filled with a liquid, thread rubber wound on the liquid center, and a cover. The center bag is formed of a rubber composition comprising a base rubber, an inorganic filler, and a process oil having a pour point of up to 0.degree. C. The content of the process oil is limited to 5 to 18% by weight of the content of the inorganic filler. The ball is improved in flying distance at low temperature.

Abstract: A tire inner-liner, comprising a solid rubber and a complex, said complex comprising a reactive rubber and a layered silicate clay uniformly dispersed therein. The complex comprising the clays significantly improve the low air permeability of the tire inner-liner without adversely affecting the rubber composition.

Abstract: A reclaimed joint sheet used as a gasket or packing member for automobiles, ships and the like consists of a first layer of a joint sheet made from a given composition, a second layer of a joint sheet made by mixing finely pulverized pieces of the joint sheet after the punching out of the joint sheet having a given particle size with a composition for the formation of the joint sheet, and a third layer of a joint sheet containing the same components as the first layer.

Abstract: An explosion-proof porcelain housing for use in a gas-filled insulating apparatus, comprising a porcelain housing body, and a first and second films. The first film is made of a first insulating material having low hardness and high elasticity, and is bonded to an inner surface of the porcelain housing body. The second film is made of a second insulating material having high hardness and high mechanical strength, and is bonded to an inner surface of the first film. A process for producing such an explosion-proof porcelain housing is also disclosed.

Abstract: An improved method for achieving enhanced bond strength between components of unvulcanized and at least partially vulcanized rubber the improvement comprising the steps of selecting first and second initially unvulcanized rubber components (10, 12) for the manufacture of a vulcanized rubber article (21); applying an interphase layer (11) of rubber material, essentially devoid of crosslinking agents and containing from about 0.

Abstract: There are described an improved vacuum suction pad and a method for manufacturing such suction pads, in which, in addition to reductions of contaminant components, the material of vacuum suction pads is subjected to an improved surface treatment which prevents deposition of pad marks on work surfaces and reduces frictional resistance of suction pads on work surfaces to lessen their fatigue. Suction pads of synthetic rubber, to be connected to a vacuum source, are each formed with a thin halogenation-hardened layer at least on a sucking surfaces to be held in contact with a work surface.

Abstract: A rubber article has a rubber base body and a non-black areal member attached to the surface of the rubber base body. The rubber base body is made of a rubber compound containing at least one a basic, amino-group containing, aromatic anti-oxidant. The non-black areal member contains inorganic acidic components.

Abstract: An aqueous composition comprises a natural rubber modified with a graft-polymerised methylmethacrylate polymer such as a graft-polymerised methlmethacrylate, an acrylic polymer, an acrylonitrile synthetic rubber and optionally, minor ingredients. The minor ingredients may be a quaternary ammonium surfactant and a polysiloxane. The composition is applied to an article such as of natural and/or synthetic rubber to effect coating. The process is especially suited to coating of medical gloves.

Abstract: A multi-layer flexible article includes a first layer of natural rubber, a second layer of natural rubber, polyurethane, poly(acrylamide/acrylic acid) and polyethylene oxide and a third layer of acrylic copolymer and fluorocarbon telomer resin. The article is preferably a glove formed by the method of dipping a hand shaped mold into baths containing aqueous emulsions of the components used to form the layers. Gloves manufactured according to the method are substantially wet-hand and dry-hand donnable as compared to powdered latex gloves of similar size. The finished gloved is water washed and wet autoclaved to substantially reduce the protein content from the natural rubber and substantially remove other water extractable allergenic moieties. The washing and autoclaving renders the glove substantially hypoallergenic as compared to gloves not so treated.

Abstract: A structure and related method for forming a surface on which sports activities occur. The disclosed structure uses three basic layers to form the surface on top of a prepared substrate. The first layer is comprised of a plurality of sublayers bound together by adhesive coatings, the first of which requires deposition of resilient particles in the 3 to 6 millimeter size range. Several subsequent sublayers include smaller-sized particles which, after deposition and spreading, result in a relatively smooth and resilient latex-bound base mat. The second layer provides a cushion coating, while a slightly textured decorative finish coating results from application of the third and final top layer. A method for forming these three layers is also disclosed which method specifies both the sizes of particles and the spread rate for particles and adhesive material for each of the sublayers in the first layer.

Abstract: An unvulcanized tread material for a pneumatic tire, including two layer members of a cap layer and a base layer and having a structure in which one or more portions of the base layer member project into the cap layer. The one or more portions of the base layer member project into the cap layer so as to respectively oppose one or more circumferential direction grooves to be formed in a manufactured tire. An interior of a mold is pressurized so that one or more convex portions, for forming a tire groove, of the mold and one or more projecting portions of the base layer member respectively contact. A manufactured tire in which the base layer member is exposed at bottoms of one or more grooves is formed.

Abstract: An article and method for marking elastomeric articles, such as tires, floor mats, and the like, includes an elastomeric sheet which is marked with indicia using a solvent based ink which contrasts with the elastomeric sheet. The indicia is cured with a clear thermoset layer such as a polyurethane. This is then applied to an uncured elastomeric article and the elastomeric article is cured. The heat and the pressure of curing causes the elastomeric sheet to bond to the elastomeric article. The indicia remains discernible and is not easily marred or dulled. After curing, the transfer can be further marked by heat transferring indicia in the form of a sublimation dye through the clear polyurethane layer.

Abstract: The invention is a multilayer tire sidewall having an outer layer prepared from a blend of isomonoolefin/para-alkylstyrene copolymer and general purpose rubbers. The inner layer comprises general purpose rubber. The resulting sidewall exhibit good ozone resistance and fatigue crack resistance as well as a reduction in staining and discloration.

Abstract: A heat activated transfer which is particularly suitable for marking elastomeric articles comprises a lower elastomeric layer bonded to an upper polyester layer. The upper polyester layer in turn carries indicia which is a sublimation dye heat transferred into the polyester layer. The polyester is preferably a high temperature saturated polyester resin, preferably polyethylene terephthalate. The lower layer is preferably a thermoplastic elastomeric layer. The two layers are bonded together by a thermoplastic adhesive, preferably a polyester.

Abstract: In order to stabilize stacks of cartons of consumer products which have ultra-low friction, glossy, point of sales graphics surfaces, on a pallet, without having to package the cartons in an outer container such as a corrugated cardboard box or the like, high-friction tie sheets are used between each superimposed layer of the carton. Each tie sheet has opposed ultra-high friction surfaces with a coefficient of friction of at least 0.8, up to 0.9 or even higher to itself.

Abstract: A laminate formed by heat fusing a heat sealable polyolefin sheet to two cured polyolefin sheets to produce a water impermeable seal between the cured polyolefin sheets. The heat sealable polyolefin sheet is preferably bonded to a porous heat resistant backing on one surface and the other surface is heat fused to the cured polyolefin sheets. The cured polyolefin sheets may typically be in juxtaposed or overlapping arrangement. The porous backing may be in the form of a fibrous sheet. The heat sealable polyolefin sheet is preferably low density polyethylene and the cured polyolefin sheets are typically cured EPDM rubber.

Abstract: A weather strip fixed in place by pressure against an adhesive tape attachment where the adhesive ability of the tape is increased, especially at points of high stress. The fixing portion of the weather strip includes hardened portions. The hardened portions are harder than the remaining body of the fixing portion material and are positioned so as to extend along the edge of the adhesive tape or where needed to properly assist in the transfer of sealing pressure from the fixing portion onto the adhesive tape. When the fixing portion is pressed in place, the pressure is more effectively transmitted to the desired area of the adhesive tape so that the fixing portion is more firmly adhered.

Abstract: A seal layer for use in heat sealed containers, especially retortable polymer containers. A semirigid or rigid packaging container with a multilayer laminate heat sealed to a tray flange, the laminate having a barrier layer and the lidding being easily opened by cohesive failure of a layer containing as elastomer. The elastomer is preferably PIB in a heat seal film layer on a polypropylene tray.

Abstract: A composite material, suitable for use in a power transmission belt, having a rubber matrix and a plurality of short staple reinforcing fibers therein of methaphenyleneiso-phthalamide coated with one of a rubber latex and a rubber paste. The invention is also directed to a method of forming the composite material.

Abstract: A plurality of viscoelastic layers in the form of rubber films are sandwiched between two constraint plates in the form of iron plates via polyamide adhesive films to form an alternatingly laminated structure. Materials of the respective elements are selected so that their degrees of elasticity satisfy the relationship: constraint plate>adhesive layer>viscoelastic layer. The thickness of each rubber film is limited below a predetermined value to maintain its thermal and pressure resistance, and the rubber films are laminated up to a total thickness required for obtain a desired vibration damping property. The vibration damper, thus obtained, is excellent in vibration property, thermal and pressure resistance, and resistance against oils and solvents, and effective even under a severe environment.

Abstract: A rubber article formed from a rubber composition having a rubber component is provided wherein the article has a texture coating thereon. A texture coating mixture is formed from a mixture of a rubber composition having a rubber component substantially the same as employed to form the rubber article, and rubber particles also having a rubber component substantially the same as that of the rubber article. A method of forming a rubber article is also provided which includes coating a rubber article with such a texture coating mixture.

Abstract: A method of molding articles having layers or sections of varying hardness in which the interface between the diverse hardness consists of a permanent homogeneous intermaterial crosslink and therefore continuous chemical bond. The invention contemplates using combinations of selected peroxide catalyzed reactions to crosslink very high molecular weight, heat curable, high consistency polymers of diverse cured hardness across composition boundaries. The technique involves combining selected heat-curable materials of various hardnesses and combining each with selected peroxide crosslinking catalysts having various half-lifes with respect to free radical decay.

Abstract: Two vulcanizates are adhered to each other by (I) applying a particular rubber cement composition to surfaces of the vulcanizates to be adhered and drying it; and (II) sandwiching an unvulcanized rubber sheet of a particular cushion rubber composition between the applied surfaces of the vulcanizates and fulcanizing them at a temperature of 0.degree.-100.degree. C. under pressure.

Abstract: An outdoor floor covering comprised of two laminated sheets of flexible water-resistant materials. A top one of the sheets has a low-profile ribbed outer surface and is comprised of a material capable of retaining flexible properties at low temperatures well below freezing. The other sheet is a backing sheet formed of a closed cell material having a density which is much weaker than that of the top sheet so that the backing sheet is impermeable and deforms under the force of a small load exerted on the top sheet whereby any ice formed on the top sheet can be easily broken by the deformation of the top sheet caused by a person standing on the floor covering. The backing sheet also has a thickness which is at least three times that of the top sheet.

Abstract: Rubber and vinyl articles such as gloves with improved slip coatings and processes for their production are provided by coating the outer and/or inner surfaces with either (1) a copolymer of at least one copolymerizable vinyl halide, at least one copolymerizable ethylenically unsaturated hydrocarbon and at least one copolymerizable ethylenically unsaturated monomer containing a carboxyl or amido group, (ii) copolymer of at least one copolymerizable vinyl or vinylidene halide, acrylonitrile and at least one acryulic monomer, or mixtures of (i) and (ii).

Abstract: A thin, multilayered rubber article and method of making it, having greater resistance to the leakage of fluids therethrough, despite repeated stretching and relaxing of the article within a wide range of movement. The article exhibits a "self-healing" property to impede fluid leakage despite preexisting, or later formed, pinholes or other small openings through the layers. In the method, the base layer is initially stretched before applying an intimately adhered, thinner overlayer of elastomeric material, thereby to provide a stressed interface between the two adhered layers. Additional overlayers can be applied.

Abstract: Rubber compositions are disclosed which are capable of exhibiting superior adhesion and high water resistance in bonding rubbers to brass and to organic fiber cords and also to different rubbers. Such bonding characteristics can be obtained by the use of specified amounts of a selected class of organic sulfur-containing compounds combined with sulfur-curable rubbers, silica, resorcin donors and methylene donors. Hoses are also disclosed which have these compositions applied as adhesive layers.

Abstract: A resilient pad for keyboards, such as computer keyboards, is disclosed. The pad is composed of EPDM blended with a copolymer of propylene oxide and allyl glycidyl ether. Each of the polymers is present in the amount of 10-90 parts. An accelerator system for the polymer blend is also disclosed. The pad has substantially improved resilience as measured by the hysteresis of the pad.

Abstract: A self-molding part in a self-molding hose formed by vulcanizing an elastomer applied as a topping layer to one surface of a heat-shrinkable woven fabric is used as a hose molding part. With the use of this self-molding part, a self-molding hose is formed without using any external pressure devices such as molding using restricting fabric and a mold, etc. Further disclosed is a continuous vulcanization method in which a continuously formed hose is heated from the inside surface of a hose, and a continuous vulcanization method in which a continuously formed hose is heated from the outside surface of a hose.

Abstract: A thermal transfer recording medium is disclosed which is improved not only in the print quality on a transferee medium of poor smoothness, but also in character quality in a high speed printing operation. The recording medium comprises a support and at least two heat softening layers provided on the support in the order of a first heat softening layer and a second heat softening layer. At least one of said first and second heat softening layers contain a colorant, and said second heat softening layer contains a heat fusible substance in an amount of from 15% to 50% by weight; a thermo-plastic resin in an amount of from 20% to 80% by weight; and a tackifier in an amount of from 5% to 35% by weight.

Abstract: Patches are provided for repairing damaged articles made of rubber or plastic. Each patch has a main element and a connecting layer applied to the underside of the main element and also extending over part of the top of the main element. For repairs, several patches can be placed over each other and next to each other partly overlapping without the necessity of prior cleaning and roughening of the sites where the connecting layers overlap.

Abstract: In an optical recording medium, an under layer is formed between an even pattern of a substrate and a recording layer, and said under layer is made of a high polymeric material which can be melted, sublimated, or decomposed at a lower temperature than the melting point, the sublimating point, or the decomposing temperature of said recording layer. Accordingly, said under layer can relax the thermal shock transferred from said substrate into said recording layer, and the deformation of said substrate can be prevented, even through a laser beam for playback is repeatedly radiated onto said recording layer, and said optical recording medium has a larger recording sensitivity than the recording sensitivity of an optical recording disc of a prior art.

Abstract: A refrigerant transporting hose having an inner tube including an inner and an outer rubber layer and an intermediate resin layer interposed between the inner and outer rubber layers; an outer tube formed of a rubber material located radially outwardly of the inner tube; and a reinforcing fiber layer interposed between the inner and outer tubes, such that the reinforcing fiber layer and the inner and outer tubes constitute an integral tubular body. The inner tube further includes a first adhesive layer for bonding the inner rubber layer and the intermediate resin layer to each other, and a second adhesive layer for bonding the intermediate resin layer and the outer rubber layer to each other. The first and second adhesive layers consist essentially of at least one elastomer, and at least one resin selected from the group consisting of phenolic resin and epoxy resin.

Abstract: In that a vulcanized rubber article (8), preferably of sheet or plate form and preferably having a relief pattern, in at least part of its surface, integrated in any surface area, inserted or settled into same, has been provided and vulcanized together with a rubber material (6) in the form of letters, signs, and digits in at least one color deviating from the rubber article (8) color composition, and that the rubber material (6) has a vulcanizing temperature range matching that of the rubber article (8), a hardwearing and washproof as well as distinct marking of the rubber article is obtained. A label to be used for the marking of the rubber article consists of a foil material (10) of a thickness of 10-100 micron upon which using a printing ink (11) of rubber material inverted text, figures and/or pictures have been printed.

Abstract: Multilayer polymeric coextruded slabs and structural shapes obtained by contemporaneous extrusion of different polymers in a single extrusion head wherein at least one of the different layers consists of a lamina of a vinyl-aromatic polymer containing up to 20% by weight of an ethylenically unsaturated nitrile.The present invention relates to multilayer polymeric coextruded slabs and structural shapes and to the process for obtaining them.More particularly, the present invention relates to multilayer polymeric coextruded slabs and structural shapes wherein the adhesion is performed by coupling to the polymeric layers a sheet of a vinyl-aromatic polymer containing an ethylenically unsaturated nitrile.

Abstract: An anti-seismic bearing made up of a plurality of rigid plates and viscoelastic flexible plates laminated alternately, said flexible plates being made of a material characterized by that the hysteresis ratio at 100% deformation at 25.degree. C. is 0.15 to 0.60, the loss tangent (tan .delta.) at 0.01% deformation, 5 Hz, at 25.degree. C. is 0.010 to 0.194, and the ratio E(-10)/E(30) is 1.0 to 3.0, where E(-10) is a storage modulus at 0.01% deformation 5 Hz, at -10.degree. C. and E(30) is a storage modulus at 0.01% deformation, 5 Hz, at 30.degree. C.An assembly composed of low-damping anti-seismic bearings and high-damping anti-seismic bearings arranged in parallel such that the anti-seismic bearings support the vertical load and undergo elastic deformation in the horizontal direction.

Abstract: A process is provided herein for coating a preformed, porous base material comprising a mineral fibrous or particle material or an organic fibrous or particle material or mixtures thereof to provide a novel preformed base material. The process comprises applying at atmospheric pressure a coating of a vulcanizable elastomeric material in unvulcanized form to a surface of such preformed, porous base material. The elastomeric material is permanently adhered to the preformed porous base material by a hot press, hot vulcanization step. In this way the elastomeric material is substantially simultaneously both adhered securely to one outer surface of the base material and is penetrated and impregnated below and into the same surface of the base material to be within the porous structure of the base material, and is vulcanized therein in situ by the joint action of a pressure of about 50 to about 500 Newton/cm.sup.2 at a temperature of about 120.degree. C. to about 300.degree. C.

Abstract: A waterproofing laminate suitable for use in roofs, floors or other surfaces where waterproofing is desired contains a reinforcing sheet, first and second bitumen layers secured to opposite surfaces of the reinforcing sheet, first and second compound bitumen layers secured to the bitumen layers, an elastomeric sheet secured to the first compound bitumen layer and a release sheet secured to the second compound bitumen layer. Certain preferred materials for use in the laminate are recited.

Abstract: A rubber lining component is composed of an upper part which has a different degree of hardness to a lower part. The upper part may have a Shore hardness of 70 while the lower part has a Shore hardness of 35.

Abstract: An unvulcanized tread strip for a pneumatic vehicle tire. The tread strip includes two or more superimposed layers. In order to improve the adhesion of these layers, adjacent layers of the tread strip are provided with a plurality of projections and corresponding recesses which positively intermesh with one another.

Abstract: In a magnetic recording medium having a magnetic recording coat formed on one side of a base and a back coat on the other side, the back coat consists of a dispersion in a binder of an inorgainc pigment powder having an average particle diameter of 0.2 to 0.5 .mu.m and a Mohs hardness of not greater than 6. The binder consists of a specific copolymer, a rubber-like binder, and a polyisocyanate ingredient. The copolymer consists of vinyl chloride, a vinyl alkyl carboxylate, a monomer copolymerizable with vinyl chloride, and a saponified vinyl alkyl carboxylate and has an OH/CH absorption ratio as determined from its infrared absorption spectrum in the range of 0.2 to 0.7.

Abstract: A magnetic recording medium comprising a resinous component in which magnetic particles are dispersed and a base to which the dispersion is solidly applied, the resinous component consisting of a copolymer having an OH/CH absorption ratio according to the infrared absorption spectrum of 0.2 or more and made from (A) vinyl chloride, (B) vinylidene chloride, (C) a vinyl alkylcarboxylate, (D) an other monomer copolymerizable with vinyl chloride, and (E) a saponified vinyl alkylcarboxylate, and a rubbery binder. Alternatively, a polyisocyanate is added to the above copolymer.

Abstract: The present invention relates to an elastic floor covering based on granules inserted in a binding agent. According to the invention, this covering is applied in two layers, the second being obtained by mixing, in given proportions, the binding agent, a powder of the same composition as the said granules, a solvent and a plasticizer. The invention finds advantageous application in the domain of building and construction, particularly for school rooms, sports stadiums, workshops, nurseries, etc.

Abstract: A flooring to be used for vehicles, vessels, etc. The flooring comprises a lowermost rubber layer which makes direct contact with a floor board of a vehicle, a surface layer which constitutes a surface layer portion of the flooring and an intermediate layer interposed between the lowermost layer and the surface layer. The lowermost rubber layer contains a hydrate which discharges water of crystallization at the temperature of 150.degree.-300.degree. C. and accordingly prevents rise of surface temperature by discharging water of crystallization in case of fire in a vehicle and the intermediate layer checks heat conduction from the lowermost layer and thus rise of surface temperature of flooring can be controlled for many hours.

Abstract: A self-priming pressure-sensitive adhesive bonding tape is provided having a layer of a primary pressure-sensitive adhesive material coated onto one or more surfaces with a film of a secondary pressure-sensitive adhesive material. Both the primary and secondary pressure-sensitive adhesives are modified by the addition of adhesion promoters to enhance the wetting characteristics of the tape. The film thickness of the secondary pressure-sensitive adhesive is such that the film has discontinuities which enable at least a portion of the primary pressure-sensitive adhesive layer to be directly exposed to the substrate. Bonding is accomplished with the participation of both the primary and secondary pressure-sensitive adhesives.

Abstract: An anti-corrosive sealing tape comprising a first layer which exhibits conductivity and is prepared by adding fine zinc powder, magnesium oxide and graphite powder to a rubber base; e.g., a butyl rubber containing curing agents and a second layer which plays a role of reinforcing the first layer with imparting waterproofing or thermal insulating properties thereto. This tape will protect metal pipes or structural members against corrosion when wrapped around them.

Abstract: The covering has a lower or cushioning layer (1) and an upper or wear-resisting coating (2), between which there is a reinforcing iron netting (3). Both the layers contain rubber chips (4), which are produced from old vehicle tires. The lower layer used for cushioning impact effects on the covering, is additionally provided with spherical expanded clay (5), which gives said layer a particular elasticity and also makes it independent of atmospheric humidity during production.

Abstract: Coating composition for protecting bodies immersed in sea water, comprising(a): a sub-layer of chlorinated natural rubber, and(b): an external layer comprising a polymer with amide groups.An intermediate layer can be provided, said layer consisting of a modified chlorinated natural rubber.

Abstract: A shaped article of a polymeric material has a shaped structure containing at least one polymeric component which is weldable, e.g. by heat, and at least one polymeric component which can be crosslinked by high-energy radiation. The crosslinkable polymeric component is homogeneously distributed within the shaped structure and is crosslinked at least partially in a part of the shaped structure, including at least a portion of the shaped structure.

Abstract: A wear-resistant rubber product adapted to be used as, for example, a lifter in grinding mills, comprises at least two prefabricated parts (11, 12) interconnected with one another by means of a binder layer having a thickness of at least 2 mm and consisting of in situ cast and cured polyurethane. The wear-resistant rubber product is manufactured by placing the prefabricated cured rubber parts (11, 12) at a distance of at least 2 mm from one another and by introducing, preferably injecting a reacting urethane rubber composition with excess isocyanate groups into the gap (13) to cause said prefabricated parts on either side of said gap to be contacted subtantially simultaneously by the said urethane rubber composition.