Abstract: The present invention provides a method for assembling a medical device using solvent bonding techniques. The method includes the steps of: (1) providing a first article of a polymer composition having (a) a first component of a homopolymer or copolymer obtained using monomers of cyclic olefin or a bridged polycyclic hydrocarbon, the first component being present in an amount from about 30% to about 100% by weight of the composition and (b) a second component from 0-70% by weight of the composition; (2) providing a second article of a material selected from the group of low crystallinity polymers; (3) applying a solvent to one of the first article or the second article to define an interface area; and (4) bonding the first article to the second article along the interface area.

Abstract: A method for producing a gas diffusion electrode in which a slurry of carbon black, alcohol, water and a tetrafluoroethylene emulsion is applied as a layer a non-Teflonized carbon cloth substrate, which is then heated to remove water. The dried coated carbon cloth is then rolled followed by heating to remove wetting agents present in the tetrafluoroethylene emulsion. The coated carbon cloth is then cooled and rolled again to produce the final end product.

Abstract: A nylon resin multi-layer pipe excellent in adhesivity to a nylon resin joint including at least (A) a layer containing a copolymerized nylon and (B) a layer containing a nylon resin other than the copolymerized nylon of the layer (A) wherein the surface in contact with the joint is the layer (A) containing a copolymerized nylon and an adhesion method for adhering a nylon resin joint to the aforementioned nylon resin multi-layer pipe using a solvent adhesive are described.

Abstract: A process for autogeneously bonding two cellulosic laminae to form a multi-lamina substrate by high pressure lamination. The attachment occurs at selective bond sites wetted with a functional fluid such as water prior to bonding. The process is applicable to multi-lamina substrates formed from laminae treated with chemical softening agents.

Abstract: Disclosed is a process for producing a laminate suited for use in producing disposable absorbent products comprising a nonwoven web formed from randomly dispersed fibers bonded with a crosslinked vinyl acetate/ethylene adhesive and a particulate polymeric absorbent entrapped within the laminate in fixed location by means of adhesively bonding the nonwoven web to itself or to another substrate, the improvement which comprises utilizing a nonwoven web incorporating an acrylic or vinyl acetate/ethylene adhesive having the following characteristics, and further, said nonwoven web adhesively bonded to itself or to another substrate through the crosslinked acrylic or crosslinked vinyl acetate/ethylene adhesive.

Abstract: Methods of bonding glass and silicon-containing articles are disclosed. Bonding is achieved without use of adhesives or high temperature fusion. A wide variety of glass and silicon-containing articles may be bonded by the methods of the invention.

Abstract: Methods of bonding glass and silicon-containing articles are disclosed. Bonding is achieved without use of adhesives or high temperature fusion. A wide variety of glass and silicon-containing articles may be bonded by the methods of the invention.

Abstract: The present invention is directed to a method for the lamination of fluoropolymers to the surfaces of metals, and especially to copper, gold, and platinum, and to printed circuit board (PCB) substrate at temperatures substantially below the sintering temperatures or melting temperatures of the fluoropolymers. More specifically, the invention is directed to a method for surface modification of fluoropolymers by thermal graft copolymerization with concurrent lamination of metals in the presence of a functional monomer and an adhesive such as an epoxy resin. The process can be carried out under atmospheric conditions and in the complete absence of an added polymerization initiator. The laminated fluoropolymer-metal or fluoropolymer-PCB substrate interfaces exhibit T-peel strengths of no less than 8 N/cm. This invention can also be applied to substantially improve the adhesion between PCB substrates and metals.

Abstract: The present invention is directed to a method for the lamination of metals, and especially copper, to the surface of polyimides and derivatives of polyimides at temperatures substantially below the curing temperature of the imide polymers. More specifically, the invention is directed to a method for surface modification of polyimides and derivatives of polyimides by thermal graft copolymerization and interfacial polymerization with concurrent lamination of the metal of interest in the presence of an appropriate functional monomer. The process can be carried out under atmospheric conditions and either in the presence or the complete absence of an added polymerization initiator. The so laminated polyimide-metal interfaces exhibit T-peel adhesion strengths in excess of 16 N/cm. The adhesion strength also exceeds the fracture strength of polyimide films with a thickness of 75 &mgr;m.

Abstract: The invention provides a labelling process comprising providing a container and a polymeric film label, applying water-based adhesive to one side of the label and applying the side of the label to which adhesive has been applied to the container, characterised in that the adhesive is applied to the label in a discontinuous pattern. The pattern is preferably formed from non-contiguous indicia, in particular dots.

Abstract: A method for forming and applying a roadside display system is disclosed. Character-shaped are formed in a thermoplastic polymer resin material with a highly reflective face. A readily available sheet cutting die press allows the characters, numerals or letters, to be cut on site with a minimum of effort. Typically, a matching set of character-shaped inserts are cut from a second sheet of thermoplastic polymer resin material with a different color, contrast and reflectance. The inserts are placed in the corresponding character-shaped apertures cut in the first sheet and then a reactant, in the form of contact cement, is used to adhere the sign to a roadside curb. An exothermic reaction occurs between the reactant and thermoplastic polymer resin material which adheres the thermoplastic polymer resin material to the curbside.

Abstract: The present invention relates to a solvent-welding process for water-soluble films, characterised in that the solvent has a viscosity of from 1.5 to 15,000 mPa.s.

Abstract: It is known to thermally weld bodies made of plastic without or with use of an auxiliary substance (adhesive), where the welding temperature is above the glass transition temperature of the plastic.

Abstract: To present printed wiring boards and other electronic components having excellent cockroach repelling performance even after solder reflow or solder flow.

Abstract: The solvent-free two-component adhesive composition of the present invention is prepared by a polyol component (A) and a polyisocyanate component (B), wherein the composition comprises at least one polyol component having crystallinity and selected from the group consisting of a polyester polyol, a polyether polyol, a polycarbonate polyol and a polyurethane polyol in an amount of 3 to 50% by weight relative to the total weight of the components (A) and (B). The adhesive composition has the initial viscosity of about 100 to 1,500 mPa·s (in particular, 100 to 1,000 mPa·s) at 70° C. immediately after the components (A) and (B) are mixed together, and the increasing ratio of viscosity after the composition is stood at 70° C. for 10 minutes to the initial viscosity of 120% or less. According to the present invention, a composite laminated film having the good external appearance can be produced simply and effectively.

Abstract: An antireflection coating includes one or more inorganic antireflection layers (typically metal oxide or silica layers) and a polymer layer cured in situ, the polymer layer having a refractive index not greater than about 1.53 over the wavelength range of 400 to 700 nm and a thickness of from about 20 to about 200 nm. The polymer layer provides good scratch and fingerprint protection, and also enables the thicknesses of the inorganic antireflection layers to be reduced, thereby reducing the cost of the coating.

Abstract: The present invention includes a method of reducing slippage between a mat having a flexible polymer back surface and a second surface contiguous to the back surface, the method comprising applying a liquid comprising an aqueous solution of poly(vinyl acetate) to the back surface and contacting the back surface with the liquid thereon to the second surface while the aqueous solution is still wet. The method is especially effective where the mat comprises a flexible polymeric back surface comprising a flexible polymer selected from the group consisting of natural rubber, synthetic rubber, natural elastomers and synthetic elastomers. The contacting may be performed before the aqueous solution is completely dried. The aqueous solution may be applied directly to the back surface or directly to the back surface by spraying said aqueous solution onto said the surface. The aqueous solution may applied directly to the second surface, also possibly by spraying.

Abstract: This invention pertains to apparatus and methods for creating ultrasonic bonds in sequentially advancing absorbent article workpiece segments, in a bonding nip. The ultrasonic bonding apparatus comprises a frame, anvil support apparatus, horn support apparatus, closure apparatus, a load cell support member, and a load cell. The ultrasonic horn and the anvil roll collectively are mounted and configured such that the ultrasonic horn and the anvil roll can be brought together, via the closure apparatus, to define the nip therebetween. The load cell is mounted to the load cell support member such that force representative of force exerted on the anvil roll at the nip is detected by the load cell. In preferred embodiments, the invention includes outputting information from the load cell and adjusting force in the nip in response to the information received from the load cell.

Abstract: Disclosed is a PVC pipe cement composition that comprises a polymeric material of a methyl methacrylate homopolymer or copolymer, a styrene-acrylonitrile polymer, and a rubber grafted with at least a methacrylic acid ester of a C1 to C8 alkanol; and at least about 10% by weight solvent.

Abstract: A polyolefin article is provided which exhibits excellent levels of mechanical strength and dimensional stability to temperature while not incorporating a dissimilar reinforcing material, such as a glass fiber, and which can be readily manufactured. Methods for manufacture of the polyolefin article are also provided.

Abstract: A method and apparatus for solid bonding without using a bonding agent are provided. A surface of metal, glass, or other bond members 16a and 16b is fluorinated by exposure to a mixture of HF gas from a HF gas supply unit 24 and water vapor from a vapor generator 26 in a fluorination process section 12. The bond members 16a and 16b are then placed in contact at the fluorinated surface on table 36 in bonding process section 14. Argon is then introduced to bonding chamber 34. Pressure is then applied to the first bond member 16a and second bond member 16b by a cylinder 46, and heated to below the melting point by a heater 48, to bond the first and second bond members together.

Abstract: An aerosol solvent weld cement composition for joining ends of plastic pipe. The composition contains at least one polymer capable of welding the plastic pipes to each other, at least one solvent for the polymer, and at least one propellant for the polymer/solvent solution. The composition is maintained under pressure greater than atmospheric pressure in an aerosol container. A female omnidirectional valve is disclosed for use in the aerosol container. This valve comprises a valve body having an omnidirectional attachment which contains a check valve container made up of a constricted lower end, a top surface, a lateral opening, and a check ball for opening and closing passageways. This valve allows the solvent weld cement composition to be applied to pipes from any angle.

Abstract: A method of producing a vibration isolation mount assembly comprising at least one metal bracket member bonded to a volume of a resilient elastomeric material. The bonding of the elastomeric material to the metal bracket is improved by electrostatically spraying the metal brackets with an epoxy coating prior to adhering the rubber to the metal bracket members, but after vulcanization of the rubber material.

Abstract: A thrust chamber assembly for liquid fueled rocket engines and the method of making it wherein a two-piece mandrel having the configuration of an assembly having a combustion chamber portion connected to a nozzle portion through a throat portion is wrapped with a silica tape saturated with a phenolic resin, the tape extending along the mandrel and covering the combustion chamber portion of the mandrel to the throat portion. The width of the tape is positioned at an angle of 30 to 50° to the axis of the mandrel such that one edge of the tape contacts the mandrel while the other edge is spaced from the mandrel. The phenolic in the tape is cured and the end of the wrap is machined to provide a frustoconical surface extending at an angle of 15 to 30° with respect to the axis of the mandrel for starting a second wrap on the mandrel to cover the throat portion.

Abstract: Medical tubing having a wall formed of multiple strands bonded together. One method for making the tubing utilizes multiple spools containing polymeric strands disposed about a central mandrel, with the strands aligned with and disposed evenly about the mandrel, with both mandrel and strands entering a die or other bonding device. Adjacent strands are bonded together to form a tube wall, the tube preferably having at least one lumen therethrough. Adjacent strands are lightly bonded in some embodiments and highly bonded in others. Bonding can be accomplished using heat, solvent welding, or adhesive. The strands making up the tube wall can be formed of materials differing between strands. One use of the tubing is for constructing angioplasty catheters.

Abstract: A method for making an improved radar absorbing structure which includes forming a stack of layers of elastomeric sheet material, at least one of which supports conductive material, with a layer of dielectric material, shaping the stack, and curing the shaped stack. The stack of layers has a thickness of no more than 0.1″, and may be wrapped about a mandrel or fitted to another forming body to impart a final, complex, shape to the stack, and then cured.

Abstract: A method and apparatus for solid bonding without using a bonding agent are provided. A surface of metal, glass, or other bond members 16a and 16b is fluorinated by exposure to a mixture of HF gas from a HF gas supply unit 24 and water vapor from a vapor generator 26 in a fluorination process section 12. The bond members 16a and 16b are then placed in contact at the fluorinated surface on table 36 in bonding process section 14. Argon is then introduced to bonding chamber 34. Pressure is then applied to the first bond member 16a and second bond member 16b by a cylinder 46, and heated to below the melting point by a heater 48, to bond the first and second bond members together.

Abstract: A method of attaching a flexible plastic film having electronic circuit traces to a rigid plastic substrate. The film and substrate are made from different incompatible plastic materials that do not bond to one another and have different CTE. The use of different or incompatible materials is useful where the properties of the backing structure and film are selected to achieve different results. For example, the flexible film may be selected from a material that provides a high melting point to withstand soldering while the backing material is selected from a low-cost and light weight plastic material that has a lower melting point. The film has conductive traces on at least one surface thereof and a backing surface. A heat activated adhesive is applied to the backing surface. The film is placed within an open injection mold and the mold is closed. A hot plastic resin is injected into the mold adjacent the adhesive.