Abstract: This invention is a process for the production of a continuous running length of a thermosetting polymer by a continuously extruding a continuous running length of a sheath of a film forming fiber from a die to form a hollow object; b) continuously injecting the monomer of the thermosetting polymer into the hollow of the sheath at or immediately below the plane of the die opening; c) stretching the sheath containing the monomer; and d) polymerizing the monomer to make the continuous running length of fiber of thermosetting polymer.

Abstract: A method of producing a multiphase polymer is disclosed whereby the phases have the same chemical structure but have different morphological states and thus different properties. This is achieved by forming a mixture of precursors of the polymer, at least one of the precursors having a reaction rate higher than the other precursor or precursors in the mixture. The precursor having the highest reaction rate is then converted to obtain a composite of a polymer and the precursors that are not polymerized. This mixture might also be formed by mixing a soluble polymer with its precursor.

Abstract: The present invention relates to a method for molding an agglomerated preform of a fiber-reinforced composite material comprising a resin material as a matrix and reinforcing fibers dispersed therein, into a desired shape. In the molding method, the preform is heated from the interior thereof, whereby the temperature of the entire preform can be raised efficiently and uniformly. If an optional number of holes are formed in the agglomerated preform, rod-like heaters for heating or gas nozzles for the release of heated gas can be inserted into the preform easily through such holes, whereby uniform heating can be effected. Further, by incorporating an appropriate amount of a dielectric loss improver into the preform and thereafter subjecting the preform to high-frequency heating or microwave heating, the preform can be heated efficiently and uniformly in a short time.

Abstract: A method for making a rubbery weatherstrip having a suede appearance and a suede feel includes a step for coextruding a welt portion of a weatherstrip and an outer rubber layer containing fibrillated fibers, namely bast fibrillated fibers, leaf fibrillated fibers and mixture thereof, or a welt portion of a weatherstrip, a sealing portion and an outer rubber layer containing fibrillated bast or leaf fibers to adhere these sheets, a step for vulcanizing the entire portions thereof, and a step for subjecting the outer rubber layer to buff processing.

Abstract: Method for forming a composite elastomer tire tread by applying a heat curable liquid elastomer mixture to a thin rubber sheet and curing the liquid mixture to form the composite tire tread. A tire retreaded with such a composite tire elastomer tread is also described.

Abstract: Hoses are often reinforced with fabric to improve their performance characteristics, such as burst strength. By utilizing the technique of this invention, hose which has a high level of burst strength can be manufactured without including continuous yarn reinforcement. This invention specifically reveals a process for manufacturing a hose which involves the steps of (1) extruding a rubber composition into the form of a tube, wherein the rubber composition contains (a) an EPDM alloy comprised of (i) standard EPDM rubber, (ii) an EPDM rubber having thermoplastic side chains grafted thereto, and (iii) dispersed thermoplastic wherein the thermoplastic is selected from the group consisting of nylons, polyesters, and polyphenylene oxides, (b) an EPDM rubber, (c) carbon black, (d) at least one curative, (e) zinc oxide, (f) a processing oil, and (g) stearic acid; (2) shaping the tube into the geometric form desired for the hose; and (3) curing the rubber composition at a temperature within the range of 130.degree. C.

Abstract: A three-dimensional printed circuit assembly is formed by first making a substrate (20). A substrate (20) is first formed from a photoactive polymer (14) that is capable of altering its physical state when exposed to a radiant beam (30). At this point, the substrate is only partially cured. A conductive circuit pattern (50) is then formed on the partially cured substrate. The substrate is then molded to create a three-dimensional structure, and then further cured to cause the photoactive polymer to harden.

Abstract: Langmuir-Blodgett films having photo-electronic properties and methods of making the same. The instant films may be made, for example, by spreading a mixture of one or more types of biotinylated lipids and one or more types of electrically-conductive lipids over a water-miscible liquid subphase. Conjugated molecules comprising a biotin-binding component made up of an avidin or streptavidin molecule or a fragment or derivative thereof having biotin-binding activity and a photodynamic proteinaceous component are then injected into the subphase. Because of the affinity between biotin and the biotin-binding component, the conjugated molecules bind to the biotinylated lipids. The air-subphase interface is then compressed, causing the biotinylated lipids and electrically-conductive lipids to form a monolayer thereat.

Abstract: A method and apparatus for continuous casting of polymerizable thermosetting materials comprises mixing the materials with controlled amounts of two or more catalyst groups and passing said mixture through two or more series of heating stages. The initially gelled mixture which has not yet undergone excessive shrinkage is mechanically isolated from the ungelled mixture.

Abstract: A method of forming a body comprising resin material which can be crosslinked to form a thermally stable resin is carried out by the sequential steps of:(A) providing a body of resin which can be crosslinked to form a thermally stable resin;(B) selectively crosslinking said body to provide a first zone of substantially uncrosslinked resin; a zone of substantially crosslinked resin and a transition zone therebetween;(C) forming said first zone and transition zone; and(D) substantially crosslinking said first zone and transition zone.Step (C) can be carried out by introducing a first zone and associated transition zone into a mold cavity in effective contacting relationship with second zone of substantially uncrosslinked resin and associated transition zone and then step (D) can be carried out to thereby bond said first and second zone together. The present invention also relates to the products made by the method of this invention.

Abstract: A process for producing ultra-high molecular weight polyamide fibers by thermal post condensation in the solid phase in the presence of catalysts of normally viscous polyamide fibers below their melting point in the absence of oxygen wherein the fibers have extremely high relative solution viscosities.

Abstract: Methods of coating stereolithographic parts and smoothing over characteristic surface discontinuities having alternating recesses and peaks. A stereolithographic part is first substantially covered with a substance capable of becoming less viscous when heated at a temperature which does not substantially thermally degrade the part, wherein the heated substance has an appropriate surface tension. Then, the substance is heated to that temperature until the substance flows preferentially into the recesses of the surface discontinuities and away from the peaked surface discontinuities. The substance will thereafter form a short surface connection over the recesses of the discontinuities through the surface tension of the heated substance. The substance is then polymerized or hardened either by cooling, thermally setting or by UV curing.

Abstract: Methods for preparing highly conductive, oriented polymers are disclosed. In the preferred embodiment, solution of conductive polymer is cast onto the surface of a stretchable support material, and oriented polymer is produced by removing solvent from the solution and stretching the support material. The invention is particularly useful for preparing oriented films of polyaniline which films have been shown to exhibit conductivities in the range of 300-2,500 S/cm.

Abstract: A process for producing a rubber product by vulcanizing a molded article composed of a rubber composition containing a peroxide as a crosslinking agent in the presence of oxygen, wherein said molded article is irradiated with electron beams, is disclosed. The rubber article produced by the invention is not sticky on the surface and exhibits excellent tensile properties.

Abstract: The present invention comprises a method for controlling the curing process of a composite material part in a curing vessel such as an autoclave. The method relies on the comparison of actual part parameter values to predicted part parameter values wherein the predicted values are obtained from computer simulations of the cure cycles using thermo-chemical, cure kinetics, resin flow and viscosity analytic models. The invention provides a methodology for the continuous selection and updating during the cure process of new optimal cure cycles from sets of cure cycles in response to actual material behavior during the curing process.

Abstract: A process of producing a cleaning blade including a silicon rubber base and a resin layer which acts as a lubricant on the surface of the rubber is produced by molding a rubber material having resin powder dispersed therein at a temperature less than the softening or melting point of the resin, cutting an end of the rubber, and vulcanizing the molded rubber at a temperature higher than the softening or melting point of the resin. The resin layer is selected from polypropylene, polyvinylidene fluoride, polyethylene, or polyester.

Abstract: An extrusion method for obtaining a long phenolic resin pipe having excellent heat resistance by using an extruder having a screw, a cylinder, a die and a mandrel, the mandrel being inserted into a through-hole formed in the screw along the screw axis and protruding into the die along the screw axis, the die satisfying the following formulasR.sub.1 /R.sub.2 =0.25.about.1.0S.sub.1 /S.sub.2 =0.1.about.2.5where R.sub.1 is an outside diameter of the die flow path at the die outlet, S.sub.1 is a cross-sectional area of the die flow path at the die outlet, R.sub.2 is an outside diameter of the die flow path at the die inlet, and S.sub.2 is a cross-sectional area of the die flow path at the die inlet, and the inclination of the outer periphery of the die flow path portion from the die inlet to a starting point of the uniform flow path portion having the same cross section as the die outlet is not larger than 35.degree.

Abstract: A method for producing polymer profiles, having a varying thickness over their width and at least one longitudinal side tapering off to form a thin edge, includes of the following steps: Extruding simultaneously a plurality of the polymer profiles through a common die such that the thin edge of each one of the polymer profiles is connected to the thin edge of at least the neighboring one of the polymer profiles to form an interconnected extrudate; in a cross-section of the interconnected extrudate, providing an angle of between 45.degree. and 135.degree. between angle bisectors of neighboring ones of the polymer profiles; and separating the polymer profiles from one another after the step of extrusion.

Abstract: The invention is a process for making a cyanate ester resin cured product by (1) adding organic metal compound (a) and triethanol amine(b) to a cyanate resin composition which is flowable at a temperature of not more than 50.degree. C. comprising as its main component polyfunctional cyanate ester compound having at least two cyanate groups, thereby forming a cyanate resin composition having 0.1-5% by weight of (a) and 0.1-5% by weight of (b), which is flowable at a temperature of not more than 50.degree. C.; (2) molding the composition at a temperature of not more than 50.degree. C. (3) primary curing at a temperature of not more than 50.degree. C.; and (4) post-curing at a temperature of not less than 170.degree. C.

Abstract: A method and apparatus for continuous casting of polymerizable materials that shrink during polymerization includes rapidly heating a moving matrix substantially uniformly throughout its cross section by radio frequency energy to initiate polymerization and maintaining the matrix thereafter in substantial thermal isolation such that substantially adiabatic polymerization occurs.

Abstract: A method is disclosed for determining the distribution according to size of particles which make up a noncontinuous phase dispersed within a matrix which is not completely soluble in an aqueous solution. The method involves dissolving the matrix containing the particles in an essentially nonaqueous liquid causing the particles to be suspended. The suspension is then eluted through a separating medium which sorts the particles according to size. A detector monitors the effluent from the separating medium and creates a record of the data. This record is then compared to data obtained from known standards in order to estimate the size distribution in the sample.

Abstract: A method of making window glass with a gasket, which includes closing a mold having window glass placed therein to form an inner cavity for forming a resin gasket along the periphery of the window glass, injecting a thermoplastic resin material melted at a relatively low temperature, having a low viscosity and containing a crosslinking agent, into the inner cavity, solidifying it to form a resin gasket, and crosslinking and curing the resin gasket after removal from the mold.

Abstract: Gasket formed in place on a surface of an article by producing an initial elongated bead of a selected cross-sectional area and bringing a mold cavity having the same cross-sectional area into contact with the surface to produce the final shape of the bead on the surface.

Abstract: A method for the manufacture of silicone rubber moldings comprises the preparation of a silicone rubber composition by blending an organoperoxide having an activation energy of 25 to 41 kcal/mol into a semicurable organopolysiloxane composition whose main component is organopolysiloxane having organoperoxide-crosslinkable functional groups. The silicone rubber composition is made into a particulate form and heated at a temperature below 100 degrees Centigrade to produce a semicured, particulate molding material which retains the activity of the organoperoxide and which contains residual crosslinkable functional group on the organopolysiloxane. Subsequently a mold is filled with the molding material and the mold material is completely cured at a temperature of at least 100 degrees Centigrade under the application of pressure. The method is particularly useful for automatic molding methods.

Abstract: A method is disclosed for preparing a heterogeneous silicone rubber molding wherein a portion of the molding is formed from a semicured silicone rubber particulate and a portion from a thermosetting silicone rubber composition. The mold is filled with the particulate and the thermosetting silicone rubber composition, then closed and pressurized and heated, forming the portions into a single body or element by curing the thermosetting silicone rubber composition at the same time that curing of the semicured silicone rubber particulate is brought to completion.

Abstract: Method of tempering workpieces of duroplastic plastic, in particular a piston for a motor vheicle brake, provides that the workpiece is heated after the pressing or molding according to a predetermined time-dependent temperature rise for several hours and after an initial heating phase a difference from the respective glass transition temperature of 5.degree. to 40.degree. C. is observed.

Abstract: An elevated temperature induced reduction of insulation resistance of a metal-polyethylene terephthalate film capacitor is eliminated by controlled cooling through a glass transition temperature of the polyethylene terephthalate film or by elevated temperature storing below the glass transition temperature.

Abstract: A method for the production of fiber reinforced palstic composites, in which a continuously moving array of fibers is impregnated with resin and fast cured as it passes through a shadow boundary created by a source of radiant energy such as ultraviolet light. The method is useful for the production of axial composites such as tubes, pipes, conduits, ducts and the like, which may be created without mandrels by passing the array of fibers through closed dies. The method is also useful with open or rolling dies to create nonaxial composites such as wall panels, guard rails, vehicle body parts, and the like.

Abstract: A method of producing a hose having low permeability includes the steps of preparing a rubber mandrel having an outer releasing layer made of fluoride rubber, applying a silicon-based releasing agent having a viscosity of 300-1000 cs to the releasing layer in a state where the mandrel is being moved, and extruding a molten resin and coating it onto the releasing agent-applied mandrel while the mandrel is being moved, thereby forming a resin layer. By virtue of the provision of the releasing layer and also the application of the releasing agent to the releasing layer, the releasability of the mandrel is enhanced, thereby preventing the resin layer of the resultant hose from being injured when the mandrel removed therefrom. Hence, if the hose is used for transferring a refrigerant gas such as freon refrigerant, it is free from gas leakage, and shows high durability.

Abstract: A railroad brake shoe friction composition is prepared in the absence of a volatile solvent by first preparing a fluid paste bonding matrix containing an uncured rubber compound, a blend of highly polymerized cashew nut shell liquid resin with a reactive diluent and high surface area inorganic fillers, and thereafter adding other fillers and reinforcing fibers.

Abstract: A sheath of an articulated tube for an endoscope is formed of material produced by adding polymer of fluorine-contained rubber material of triple copolymer of vinylidene fluoride-hexafluoropropylene-tetrafloroethylene as a main component, heat-proof plasticizer of binary copolymer of vinylidene fluoride-hexafluoropropyelne for reducing hardness, MT carbon filler, Perhexa 25B of peroxide vulcanizing agent and triallyl isocyanurate (TAIC) as peroxide vulcanizing assistant, resulting in reduced hardness, good operability while bending, good drug-, heat-, and sterilization-proof and long durability.

Abstract: A method for manufacturing plastic package for semiconductor according to the present invention comprises the steps of: forming a mold product of plastic package for semiconductor, which contains therein a semiconductor chip, by molding resin by means of a transfer press; heating the mold product to postcure it during transportation from the transfer press to a heating chamber while the mold product is kept by heaters at a temperature higher than a glass transition temperature of the resin for a predetermined period of time; and further heating the mold product in the heating chamber while the mold product is kept at a temperature substantially equal to the glass transition temperature of the resin for another predetermined period of time.

Abstract: The present invention provides a method for forming a cured-resin layer having a surface with antistatic properties. An ultraviolet-curable resin having antistatic properties is laminated on an ultraviolet-curable resin for forming an electrostatic cured surface by curing and the two layers then being simultaneously cured by ultraviolet irradiation thereon. A cured-resin layer is thereby obtained where the surface layer of the cured resin is provided with antistatic properties, and is strongly held by chemical bonding.

Abstract: The invention relates to a process for the processing of a thermoplastic polycondensation polymer by supplying the polymer in finely distributed form to a first vented extruder in which the polymer is devolatilized at a temperature below its melting temperature. The polymer is then placed in a second extruder where the polymer is transported below the melting temperature of the polymer over a first length of the screw from the inlet of the extruder, with constant evacuation of volatile components by means of a vacuum exhausting device at a vacuum of less than 10 mbar and the polymer is compressed and melted over a second length of the screw and then leaves the extruder as an end product of a semimanufacture.

Abstract: Direct adhesion between a body of a thermoplastic material and a rubber mass by covulcanization is achieved by bringing a rubber body constituted of the components:100 parts by weight of an EP(D)M rubber functionalized with carboxyl groups;100-300 parts by weight filler(s);1-10 parts by weight peroxide-type vulcanizing agent;0-4 parts by weight vulcanization activators; and optionally plasticizers, in contact with a body of a thermoplastic material constituted of 30-100 wt. % of a reaction product of a thermoplastic polyester and a polyisocyanate;1-50 wt. % of a reinforcing material; and0-20 wt. % of additives.

Abstract: A process for preparing a postformable composite article of a heat curable thermosetting polymer having a substantial length and a non-trivial uniform cross-sectional shape. The process includes controlling the pull rate and the temperature of the heating and cooling sections of the die in response to the viscosity and the cure kinetics of the thermosetting polymer composition and (2) the non-trivial shape of the article.

Abstract: Foam rubber articles may be prepared by shaping foamed latex into the desired configuration and gelling it. The gelled latex may then be cut to the required thickness to provide articles such as cosmetic puffs. The shaping process may use a disposable mold such as a circular polymeric casting or the mold may be permanent, such as glass, passing through a gelling chamber. The process reduces waste for products which has previously been cut from slab foam.

Abstract: A process and device for producing a rubber tube having a smooth outside surface in which a molten synthetic resin is heated from the inner circumferential side immediately before it flows from a die along the periphery of a rubber material layer and the rubber mentioned is cooled within the die.

Abstract: A process for the solid phase deformation of orientable, semi-crystalline, thermoplastic, polymeric material, in particular polyethylene, is provided in which an improvement of the mechanical properties of the polyethylene is achieved. The process for producing a product from linear polyethylene includes forming a workpiece which is to be extruded in the solid phase by consolidating a mass of solid particulate linear polyethylene under heat and pressure. The resulting workpiece is subjected to heat treatment under pressure to cause the polyethylene to crystallize in an extended chain morphology and to have a melting point of at least 139.5.degree. C. and a density of at least 0.98 g/cm.sup.3. Thereafter the workpiece of polyethylene is deformed in the solid phase to provide a polyethylene product by, for example, passage through a die, the workpiece being subjected to a deformation extrusion ratio of at least 3 and preferably 3 to 25.

Abstract: A method of reinforcing a panel of sheet metal, a shaped plastic body or the like is performed by a one- or multi-layer stiffening member of essentially flat shape which comprises a layer at least partially consisting of a thermosetting resin. Thereby, the stiffening member is subjected to a first heat treatment until at least one of the surfaces of the stiffening member is sticky. Thereafter, the stiffening member is applied to the surface of an element to be reinforced. Finally, the stiffening member is subjected to a second, final heat treatment until all layers comprising a thermosetting resin material are cured. Thus, it is not necessary to manually prepare the stiffening member by removing a protection foil from its sticky surface prior to applying it to the element to be reinforced and fully automated handling is possible.

Abstract: A method for continuously vulcanizing a self-molding hose by external heating including the steps of first forming continuous strip of self-molding material which includes a heat-shrinkable woven fabric, a first vulcanized elastomer topping layer provided on a top surface of the heat-shrinkable woven fabric, a second vulcanized elastomer topping layer provided on an undersurface of the fabric with the second vulcanized elastomer topping layer being thinner than the first vulcanized elastomer topping layer and an unvulcanized elastomer topping layer provided on the undersurface of the second vulcanized elastomer topping layer. Then the continuous strip is overlappingly wound on a former to create a circular hose and the circular hose is continuously introduced into a gap between rotary drums of vulcanization apparatus at the same rate as the rate of the circular hose formation so that the circular hose is pressed flat, heated and vulcanized and converted into a flat hose.

Abstract: Polypropylene articles are provided. The polypropylene articles include non-crystalline mesomorphous polypropylene having olefinic unsaturation-containing monomers graft-polymerized thereon by ionizing radiation in a dosage sufficient to degrade crystalline polypropylene. The irradiated polypropylene articles retain useful tensile properties after storage periods of as long as at least about four months.

Abstract: A process for extrusion, which requires:(i) Blending low density polyethylene having a density equal to or less than about 0.915 gram per cubic centimeter with a liquid hydrocarbon oil in an amount of about 5 to about 30 parts by weight of oil per 100 parts by weight of low density polyethylene; and(ii) extruding the blend.

Abstract: An improved stereolithography system and method for curing a stereolithographically-produced part, including at least some material that is no more than partially transformed, by exposing the part to off-peak-absorptive wavelengths of synergistic stimulation to achieve a more uniform cure.

Abstract: Polymeric material is plastified in an extruder and is then divided into a major part and a minor part. Either the major part or (more often) the minor part is modified by a chemical reaction, such as grafting (any necessary ingredients being added, if not already present). The major and minor parts are then recombined in an extrusion head so that the modified and unmodified materials form distinct parts of the product. In this way, a single extruder can be used to make, for instance, a product with surface characteristics modified by grafting, wire-covering with only a surface layer crosslinked, or heat-sealable crosslinked packaging film.

Abstract: A process for the preparation of crosslinked shapes from a polymer which consists of reacting a starting polyamide with a particular silane. The polyamide should have at least 30% by weight of branched polymer chains, but these may be furnished by adding branching agents to the monomers before or during polymerization. After the reaction with silane has taken place, the polymer is molded or otherwise formed into desired shapes and brought into contact with water. This causes three dimensional crosslinking of the polymer and provides improved mechanical and fire resistant properties to the finished product. Moreover, the finished product may be formed by the usual methods of shaping without any particular treatment being required.

Abstract: An extruded web of synthetic resin having a scratch resistant coating thereon is made by depositing a material adapted to form a scratch resistant coating onto the return run of at least one of the endless belts of a dual belt continuous casting machine, the coating being transferred to the surface of the web as the extruded web is polished and cooled in the casting machine.

Abstract: A method for curing fiber-reinforced resin matrix composite materials (22) includes the steps of providing a form (14) and positioning uncured composite material (22) on the form (14) substantially into a desired shape. The composite material (22) is then cured by providing a fluid bath (10) heated to a predetermined temperature, and heating the composite material (22) by immersing the positioned composite material (22) on the form (14) into the fluid bath (10) for a predetermined time. The predetermined time is sufficient to allow the composite material (22) to become cured and to heat the composite material (22) at a rate sufficient to provide resin flow prior to hardening. Compressive pressure is provided on the composite material (22) while it is immersed in the fluid bath (10).

Abstract: A method of producing a thread-reinforced, extruded rubber body by a shear head wherein the threads are continuously supplied, embedded in a rubber mixture which is in a continuous forward motion and fixed in the rubber body by vulcanizing the rubber mixture. The method is such that the reinforcing threads are helically twisted in the finished rubber body. The rubber body is thus reinforced not only in longitudinal direction but also additionally in circumferential direction.

Abstract: A photosensitive composition wherein setting is retarded in the presence of air is subjected to partial setting by directing radiating light through the side in contact with air, thus setting the opposite side which is not in contact with air, with setting then completed by directing radiating light to the unset part of the composition in the absence of air. The composition is extended on a metal surface, with the surface in contact with the metal being subjected to setting, thus providing excellent smoothness. After the unset part of the composition is stuck by pressure to another unset composition or another film, the films can be adhered with radiating light. When metal rolls are utilized for the metal surfaces, continuous manufacturing can be easily achieved.