Abstract: Described herein is a method of preparing a fluoropolymer composite tube comprising the steps of activating a formed fluoropolymer substrate by subjecting the substrate to a charged gaseous atmosphere formed by electrically ionizing a gas which contacts the substrate and thereafter applying a layer of a thermoplastic polymer to the activated fluoropolymer substrate. The ionizing step can be described as a corona discharge or an electrically formed plasma. In particular, described is a fuel pipe comprised of an inner fluorocarbon layer having electrostatic discharge resistance and hydrocarbon evaporative emission resistance and on top of and integral with, the fluorocarbon layer an outer layer of a thermoplastic polymer. Fluoropolymer layers have excellent chemical resistance.

Abstract: Disclosed is an ornament with a thin film formed on the ornament surface. The thin film includes a fluorocarbon-based adsorbed monomolecular film, and the thin film is covalently bonded to the ornament. By contacting the ornament with the non-aqueous solution containing a chlorosilane group at one end and a fluorocarbon chain at the other end, a reaction occurs between hydroxyl groups at the ornament surface and the chlorosilyl groups of the material having a plurality of chlorosilyl grounds. A monomolecular film which is covalently bonded to the ornament surface is thereby obtained. A thin, fluorine-containing, monomolecular film thus can be formed on the ornament such that it is, chemically bonded to the ornament. The film is anti-contaminating, water-and oil-repelling, durable and does not spoil the intrinsic luster of the ornament.

Abstract: N-(4-alkylphenyl)acrylamides, N-(4-alkylphenyl)methacrylamides and N-(4-alkylphenyl)maleimides, when co-polymerized into conventional polymer systems promote adhesion of such systems to low energy polyolefin surfaces. These compounds are effective in increasing the adhesive coating properties of both solution polymer and emulsion polymer systems.

Abstract: A method which includes enhancing effects upon treating the surface of a thermoplastic resin article by a surface-activating treatment such as corona discharge and the like or by a primer treatment and, thereby, improving coating performance, printability, adhesiveness and so forth of the thermoplastic resin article. The resin article is subjected to a surface-heating treatment which comprises heating only surface layer of the resin article up to a melting point of the thermoplastic resin or a higher temperature followed by cooling the surface layer, and then, subjected to the surface-activating treatment or primer coating.

Abstract: Method of coating cores of pharmaceutical tablets with a dry powder, wherein the cores are fed onto a conveyor, the dry powder is supplied to a region through which the cores are to be conveyed, and the cores are conveyed on the conveyor through the region with the cores maintained at a different electric potential from the dry powder. In this way, the dry powder is attracted to the exposed surfaces of the cores to form powder coatings thereon. The dry powder on the surface of the cores is then melted to convert the powder into fused film coatings secured to the cores.

Abstract: There is provided a method for treating a shaped article made of a polypropylene resin before coating, comprising the step of degreasing and deterging a surface of the shaped article with an aqueous alkaline solution composed of (a) 5-50 g/liter of a builder and (b) 1-10 g/liter of an ethylene oxide adduct of aryl- or aralkyl-substituted phenol at 50.degree.-70.degree. C., the ethylene oxide adduct of aryl- or aralkyl-substituted phenol having a hydrophilic-lipophilic balance (HLB) of 8 to less than 12.

Abstract: A surface treating method is described, which method comprising applying, between electrodes, a potential sufficient to cause corona discharge to occur in the presence of a gas which comprises molecules containing at least one atom selected from the group consisting of halogen atom, oxygen atom and nitrogen atom. The resultant corona discharge is applied to an object to be treated for the surface treatment of the object, said object being outside said electrodes. The excellent adhesive surface can be obtained when said object is separated from said electrodes at a distance in the range of 10 mm to 5 m.

Abstract: A process is disclosed for treating aramid fibers with a dispersion of particulate material in a swelling solvent to yield embodiment of the particles in the surface of the fibers.

Abstract: A lightweight warp knitted textile fabric suitable for use as the loop component of a hook-and-loop fastener is formed of a set of ground yarns knitted in a relatively stretchable construction with a set of loop-forming yarns formed in a stitch pattern producing elongated underlap loops extending outwardly from the technical back of the fabric which can be readily interengaged with the hook elements of a mating hook component without any necessity for brushing, napping or mechanically raising the loops. In one embodiment, a second set of loop-forming yarns is formed in a stitch pattern producing elongated loops extending outwardly from the technical face of the fabric which can be adhered to a backing material such as a carpet backing. In another embodiment, filling yarn is inserted weftwise in every fabric course.

Abstract: A screen printing process for providing long-lasting, visually-appealing images on PVC sheet material such PVC venetian blind slats, through use of a computer hardware and CAD/CAM and computer color-matching software.

Abstract: An enhanced acrylic for use in transparencies that provides an effective barrier to airborne environmental chemical agents that are known to craze standard stretched acrylics.

Abstract: Moldings based on polyamides are surface treated with mixtures of at least 20% strength by weight aqueous hydrochloric acid with mono- or diethers of an aliphatic polyfunctional hydroxy compound in a mixing ratio of from 90:10 to 10:90% by volume.

Abstract: A water- and oil-repelling adsorbing film formed on a material having active hydrogen such as hydroxyl group, imino group and amino group at the surface. This film is a chemically adsorbed film having surface irregularities exceeding 10 nanometers. It is directly or indirectly covalently bonded to the material surface and includes a monomolecular film or a polymer film with the molecules thereof containing a fluorocarbon group and a --Si-- bond. The surface irregularities which exceed the molecular level are at least either those formed on the material surface itself, those due to particles formed on the substrate surface or those due to particles present in the chemically adsorbed film.

Abstract: Coatings of hydrophilic organic polymers such as polyvinyl alcohol are grafted to substrates formed from hydrophobic organic polymers and polyorganosiloxanes by exposing the surface of the substrate to an aqueous solution of the hydrophilic poller in the presence of a solubilized compound of tetravalent cerium that preferably contains hydroxyl or amino groups as ligands.

Abstract: A process of preparing a substrate surface for a subsequent adhesive bond, coating or pouring operation, by applying to the substrate an adhesion promoting composition comprising either:(A), (B) and (C); or (A) and (C); or (B) and (C); or (B) of the following ingredients (A)-(C):(A) 0.01 to 90 wt. % of optionally silanized material with a particle size <5 .mu.m and a hardness greater than that of the substrate surface,(B) 20 to 100 wt. % of silanized, silicon-containing material with an average particle size of 2 to 2100 .mu.m,(C) an abrasion agent with a particle size 5 .mu.m as the remainder;wherein the quantities quoted are relative to the total weight of (A)-(C). In the process the composition is applied to the substrate surface using horizontal or predominantly horizontal forces of friction, so that an adhesion promoting layer is formed on the substrate surface.

Abstract: An electrically conducting material is produced by a process which includes a step of treating a polyester substrate with an aqueous alkali solution to dissolve a portion of the polyester substrate into the solution. The resulting substrate is then reacted with a compound containing a group which can capture copper ion to introduce the copper ion capturing groups in the substrate. The copper ion-capturing group-containing substrate is thereafter treated with a source of copper ion and a sulfidizing agent to form copper sulfide bound to the polyester substrate.

Abstract: The present invention provides an article, comprising: a fabric sheet which has been microcreped; and a curable resin coated onto the fabric sheet. The present invention involves microcreping or compacting a fabric sheet to impart stretchability and conformability to the fabric while minimizing undesirable recovery forces. Suitable fabrics for microcreping are fabrics which comprise fibers which are capable of first being mechanically compacted or "crimped" and then being set or annealed in the crimped, i.e., distorted, state. The article may be in the form of an orthopedic bandage and may optionally contain a plurality of microfiber fillers dispersed into the resin. The incorporation of microfiber fillers into the casting materials of the present invention adds substantially to the strength of the cured casting material, particularly when the fabric used therein is a non-fiberglass fabric, while not detracting from the handling properties of the uncured casting tape.

Abstract: Method for the glue spreading of expanded polystyrene pieces by means of spraying an aqueous solution of an adhesive, said method consisting of protecting the portions of the support on which the piece to be glued is placed by means of a film or layer of water, the water level not reaching that of the glue surface plane, so as to protect the surface from being soiled by a glue deposit.Installation including a support having an indentation for the picking up and prepositioning of the part to be glued and immersed into a water tank equipped with feed means, water drainage overfill evacuation means, means for controlling the level activating said overfill evacuation means, and glue spraying means.Application for assembling female molds for the production of foundry patterns for disposable patter type molding.

Abstract: The surface of a polymer such as polypropylene, may be treated by contact with an amine donor such as ethylene diamine followed by irradiation with ultraviolet light of wave length of about 1800.ANG.-2800.ANG. to improve surface wettability.

Abstract: When manufacturing a magnetic recording medium, depositing material in a crucible is heated to evaporate, and the vapor particles of the deposition material is continuously deposited on a continuous substrate material running along the peripheral surface of a cylindrical cooling can between a position where the vapor particles impinge upon the substrate material at a large angle and a position where the vapor particles impinge upon the substrate material at a small angle. The distance r(.theta.min) between the substrate material and the depositing material in the crucible when the vapor particles impinge upon the substrate material at a minimum incidence angle and the distance r(.theta.max) between the substrate material and the depositing material in the crucible when the vapor particles impinge upon the substrate material at a maximum incidence angle satisfy the formula 0.25.ltoreq.{r(.theta.min)/r(.theta.max)}.sup.2.

Abstract: Members with excellent water- and oil-repelling, and anti-contaminating properties are provided by exposing fillers partially protruding from the surfaces of fiber reinforced plastics or fiber reinforced metals and chemically adsorbing a chlorosilane-based chemical adsorbent to the rough surface of the fiber reinforced plastic or metal substrate. A siloxane-based chemically adsorbed monomolecular film or a polysiloxane chemically adsorbed film is formed on the substrate by chemically adsorbing a chemical adsorbent having numerous chlorosilane groups to the substrate surface. Following that, a chlorosilane-based chemical adsorbent having fluorocarbon groups is chemically adsorbed to the film, thus forming a chemically adsorbed monomolecular or polymer film with water- and oil-repelling properties.

Abstract: Primer systems foe silicone elastomers bonded to glass or plastic substrates, particularly those elastomers used as interlayer materials in a transparent lamination of such substrates, are described. The primer system consists of a thin layer of a silica-based adhesion promoter which is applied directly to at least one surface of the substrate. An organosilane primer containing (i) silanol or functional groups that can hydrolyzed to silanol, and (ii) polymerizable alkene or silicon hydride functional groups, or preferably both, is applied over the silica-based adhesion promoter layer. Alternatively, the silicone elastomer may also contain silanol groups or functional groups that can be hydrolyzed to silanol, and polymerizable alkene or silicon hydride functional groups, thereby making a separate primer layer unnecessary. Both components must be present for the primer system to provide a more durable adhesive bond.

Abstract: A method for modifying the surface of a material by:a. exposing the surface to a glow discharge plasma to activate the surface;b. exposing the surface to an ethylenically unsaturated monomer or mixture of monomers; andc. irradiating the activated surface with gamma radiation or electron beam radiation in the presence of the ethylenically unsaturated monomer to form a graft polymerized coating thereon.

Abstract: Methods and apparatus for applying a plastic coating to woven yarn tubing to provide conduit for protecting wiring harnesses and the like. The resulting plastic coating layer is very thin so as to generally follow the contours of the woven yarn tubing, without filling in the valleys, thus minimizing the amount of plastic used. Woven yarn tubing is waterproofed by impregnating with latex sealant, and is continuously pulled by a take-up mechanism along a horizontal axis through a heated die and two treating stations in tandem. Each of the treating stations includes a coating pot containing liquid plastisol material and having a resilient circular exit die through which the tubing exits the coating pot to form a layer of liquid plastisol, and an infrared curing oven which heats the plastisol-coated tubing sufficiently to cure the plastisol layer. The tubing, while coated with uncured plastisol material, is not contacted by any element which would tend to deform the tubing from a circular cross section.

Abstract: The present invention provides an article, comprising: a fabric sheet which has been compacted using a heat shrink yarn; and a curable or hardenable resin coated onto the fabric sheet. The present invention involves compacting a fabric sheet to impart stretchability and conformability to the fabric while minimizing undesirable recovery forces. Suitable fabrics for compacting are fabrics which comprise fiberglass fibers which are capable of first being compacted and then being set or annealed in the compacted state. The article may be in the form of an orthopedic bandage and may optionally contain a microfiber filler associated with the resin.

Abstract: Silicone hydride (Si--H) can be produced on the surface of silicone rubbers by plasma treatment of silicone rubber in the presence of hydrogen or an inert gas such as nitrogen, helium, neon or argon in a plasma chamber which is substantially free of oxygen and oxygen-producing compounds. The silicone hydride can then be used as a grafting site for the covalent attachment for many substances, including bioactive molecules.

Abstract: Method of preparing an adhesive sheet comprising (1) a backing, and (2) an adhesive layer having at least one topologically microstructured surface comprising a plurality of pegs, optionally containing one or more beads, substantially uniformly distributed and protruding outwardly from the adhesive layer, wherein the pegs have essentially flat tops that comprise less than 25% of the total surface contact area of the adhesive layer, and have a height of at least 15 .mu.m.

Abstract: One side of a sheet- or plate-like bank of metallic, plastic and/or other material is provided with at least one set of parallel grooves prior to being provided with an array of pyramidal and/or conical depressions. The grooves can be formed by brushes or by grinding, and the depressions can be formed by a rotary debossing tool having a peripheral surface provided with crossing transversely extending rows and circumferentially extending columns of protuberances. The treatment enhances the ability of the one side of the thus obtained sheet- or plate-like body to accept and retain a layer of lacquer, to be provided with an adherent layer of oxide or to accept a layer of adhesive prior to being bonded to a similarly treated or to an untreated second plate- or sheet-like body. The depth of the depressions can match or approximate the average depth of the grooves. The grooves can form two sets of parallel grooves, and the grooves of one set can cross the grooves of each other set at an angle of 90.+-.45.

Abstract: The present invention discloses preadhered, melt-spun, spin-drawn polyester filaments having improved adhesive properties towards rubber and processes for making the same. The process for making these filaments include the following steps:(a) spin-drawing polyester filaments at an up-take speed ranging between about 2,000 and about 6,000 meters per minute by using an integrated spin-drawing process; and(b) immediately after spin-drawing, applying to the polyester filament a composition which has simultaneously about 0.05 to about 0.5% by weight of a polyepoxide and about 5 to about 140 ppm of a tertiary amine with linear functional groups.The resulting polyester filament has a minimum adherence towards rubber in the Strip-test of about 16.0 to about 21.5 daN.

Abstract: The invention concerns the preparation of an optical structure. On a polymeric substrate there is first provided a surface activation, and the deposit of a layer of SiO.sub.2, 2000 .ANG. thick after which there is a deposit of a plurality of functional layers and finally a deposit of SiO.sub.2, 3 microns thick followed by a deposit of Si.sub.3 N.sub.4 /SiO.sub.x N.sub.y 3 microns thick, the latter being produced under radio-frequency polarization. The thus obtained optical structure has properties of adhesiveness, resistance to abrasion and to thermal impacts.

Abstract: The deposition of a copper-containing layer on a substrate by decomposing, particularly by a CVD process, a compound corresponding to the formula (I)RO--Cu--L (I)in whichR represents a 1-aryl lower alkyl group, a branched, optionally substituted alkyl group with 3 to 6 carbon atoms, or an aryl group, andL represents (C1 to C6-alkyl)isonitrile, aryl isonitrile, carbon monoxide, dialkylaminodifluorophosphane, organyl difluorophosphane, triaryl phosphane, trialkyl phosphane, trifluorophosphane, or trichlorophosphane,is described, together with previously unknown compounds of formula (I) which may be used in the process.

Abstract: The invention relates to the chemical bonding of a polymer or polymers onto a non-metallic substrate such as cellophane by contacting the substrate with a grafting solution that contains monomers, prepolymers, catalysts and possibly other ingredients, to obtain graft polymerization onto the substrate with intimate bonding of the polymer onto the substrate surface, and curing the polymer on the substrate by microwave, laser or ultrasonic energy. The invention provides a method where the bonding of the polymer is effected solely by physical rather than chemical means by eliminating the use of silver nitrate in the pretreatment step and using microwave, laser or ultrasonic energy to polymerize the monomers and binding the resulting polymer to the substrate, with the resulting grafted polymer having the same characteristics as if the bonding was effected chemically with silver ions or colloidal silver.

Abstract: The production of high purity oxygen and hydrogen gases can be accomplished utilizing an electrolysis assembly comprising an anode, a cathode, an ion exchange membrane disposed therebetween, an anode chamber, and a cathode chamber. This ion exchange membrane has been multiply impregnated with catalyst and therefore contains internal catalyst sites where hydrogen gas, which diffuses through the ion exchange membrane from the cathode chamber, and oxygen gas, which diffuses through the ion exchange membrane from the anode chamber, react to form water. Reacting the hydrogen and oxygen gases within the ion exchange membrane prevents these gases from contaminating the oxygen stream in the anode chamber and the hydrogen stream in the cathode chamber, respectively.

Abstract: A method is provided for forming a fullerene layer on a substrate by chemically treating a surface of the substrate to provide a bond-forming species at the surface effective to covalently bond with fullerenes in solution and contacting the treated substrate surface with a solution of fullerenes to form a fullerene layer covalently bonded to the treated substrate surface. Alternately or in addition, a fullerene layer is formed on a substrate by chemically modifying fullerenes to provide a bond-forming species thereon, chemically treating a surface of the substrate to provide a bond-forming species effective to covalently bond with the bond-forming species of the fullerenes in solution, and contacting a solution of treated fullerenes with the treated substrate surface to form a fullerene layer covalently bonded to the treated substrate surface.

Abstract: The invention relates to a process for depositing a latex coating on an article made of elastomer,wherein a continuous layer of a hydrophilic inorganic pulverulent material is deposited at the surface of the elastomer and the said article is immersed in an aqueous latex suspension.The invention also relates to a composite article based on silicone elastomer comprising a latex coating, said composite article including a film made up of a hydrophilic inorganic pulverulent material at the interface between the silicone elastomer and the latex.

Abstract: Pretreatment of elastomer substrate surfaces with aqueous solutions of monopersulfate compound (MPS) and the improved adhesive bonds obtained between such pretreated substrate surfaces and other substrates.

Abstract: A method for roughening the surface of a resin molded article to make it susceptible to metallizing is disclosed, including contacting a resin molded article at least the surface portion of which to be roughened mainly includes a block copolymer including 100 parts by weight of a polyarylene sulfide component block and from 100 to 200 parts by weight of a polyarylene sulfide ketone component block with a solvent capable of dissolving a polyarylene sulfide ketone more than a polyarylene sulfide.

Abstract: An improved method of laminating a metal foil or sheet to a polyimide material is provided. A solution of a precursor of an intractable (i.e. thermosetting) polyimide is applied to a substrate and the solvent is removed to form a dry tack-free film. Thereafter, a solution of a precursor of a thermoplastic polyimide is applied onto the first film of polyimide and the solvent is removed to form a dry tack-free second film. Both films are then cured concomitantly at a sufficiently rapid rate and low temperature to effect substantial imidization of the polyimide precursors of both films without substantial crosslinking or densification of the polyimides in either of the films. Thereafter, a metal sheet or foil is laminated onto the thermoplastic polyimide film according to the following process. The thermoplastic film is contacted with the sheet or foil of metal to be laminated thereto.

Abstract: A coating method and apparatus which enables high-speed coating with a minimum of defects such as streaks including cases where the surface tension of the coating solution is relatively high. The method includes the following steps: applying an excess amount of a cleaning fluid to the substrate; scraping off the cleaning fluid at a first scraping section; applying an excess amount of the coating solution to the substrate while a remaining portion of the cleaning fluid remaining on the substrate is in an undried state; and scraping off a surface-side portion of the coating solution at a second scraping section, thereby metering the amount of the coating solution to be applied. In addition, a similar object is attained by a coating method wherein, in the aforementioned coating method, the organic solvent has a viscosity of not more than 10 cp, and in a case where the surface tension of the cleaning fluid is .sigma.c (dyne/cm) and the surface tension of the coating solution is .sigma.

Abstract: A process for producing and an image receiving material for dye diffusion thermal transfer processes comprises a carrier material, an intermediate layer of a crosslinked material, and an image receiving layer of an uncrosslinked material, and the two layers are produced without using organic solvents.

Abstract: The present invention provides a process for painting a polyolefinic resin component comprising washing the surface of the polyolefinic resin component, directly coating at least one time the surface with the following paint, and forming topcoat on the surface, the paint being a mixture of a main component containing principally a polymer resin having a hydroxyl number of 20-150, which is obtained by polymerizing (A) Chlorinated polyolefin, (B) Acrylic monomer and (C) Polyester prepolymer and a curing agent of (D) polyfunctional isocyanate compound.

Abstract: A surface treatment method of a polyamide resin composition molded article is disclosed, comprising bringing the surface of a polyamide resin composition molded article into contact with water, said polyamide resin composition molded article comprising (C) 100 parts by weight of a resin composition comprising (A) from 10 to 80% by weight of a polyamide resin and (B) from 20 to 90% by weight of other thermoplastic resin; and (D) from 0 to 20 parts by weight of at least one modifier selected from a carboxylic acid having at least 2 carboxyl groups in the molecule or a derivative thereof, an amine containing at least 2 nitrogen atom in the molecular, urea or a derivative thereof, and a low-molecular weight polyamide. A coating method of a polyamide resin composition molded article is also disclosed, comprising, after bringing the surface of a resin composition molded article into contact with water, coating the surface with a coating composition.

Abstract: A metal coated plastic and method of preparation thereof use a poly-diamine-quinone polymer as a binder, whereby a metal coating adheres to and is immobilized on a plastic surface. The poly-diamine-quinone includes the formula: ##STR1## wherein R is alkyl, monocyclic, cycloalkyl, monocyclic heterocyclic, aromatic, siloxyl, silyl and the alkyl, alkoxy, carboxyl and amino derivatives thereof, and n is about 70-700. The method of preparation includes coating a plastic substrate with a poly-diamine-quinone polymer, applying a metal coating to the poly-diamine-quinone polymer coated plastic, and curing the metal coated plastic. A further method is disclosed for imparting an electrical conductance to the metal coated plastic of the invention.

Abstract: Polymer material is surface modified with the intention of increasing the hydrophilicity of the polymer surface, by producing carboxyl groups, carbonyl groups and hydroxyl groups on the polymer surface in a first stage, by oxidizing with, e.g., oxidizing acid solutions or in some other manner, and by reacting the groups on the polymer surface in a second step with heterocyclic compounds having three or four ring atoms or with isocyanate compounds or carbodiimide compounds.

Abstract: Thermoplastic substrates, particularly those comprising polycarbonate, ABS or polycarbonate-ABS blends, are coated with an adherent aluminum coating having a thickness of at least about 1.5 microns by a process which includes fluorination of the surface followed by physical vapor deposition of aluminum. Fluorination is preferably effected by treatment with a plasma of a fluorine compound, especially a fluorocarbon such as carbon tetrafluoride.

Abstract: The present invention provides a method which enables the surface of a molded article of a polypropylene resin to be modified to a surface suitable for coating, bonding, printing, etc. A molded article of a polypropylene resin comprising polypropylene, an ethylene-propylene copolymer rubber and an ethylene-acrylic acid or ethylene-methacrylic acid copolymer and optionally a filler is irradiated in the air with a light from a synthetic quartz low pressure mercury lamp having an output of 200 W for 60 sec with the distance between the surface of the molded article and the lamp being kept at about 10 cm.

Abstract: High-temperature electrically conducting polymers. The in situ reactions: AgNO.sub.3 +RCHO.fwdarw.Ag.degree.+RCOOH and R.sub.3 M.fwdarw.M.degree.+3R, where M=Au or Pt have been found to introduce either substantial bulk or surface conductivity in high-temperature polymers. The reactions involving the R.sub.3 M were caused to proceed thermally suggesting the possibility of using laser means for initiating such reactions in selected areas or volumes of the polymeric materials. The polymers successfully investigated to date are polyphenylquinoxaline, polytolylquinoxaline, polyquinoline, polythiazole, and pyrrone.

Abstract: In a process for manufacturing a rigid magnetic recording disk, the disk's rigid substrate member is subjected to a force that produces plastic deformation in a manner so as not to remove material therefrom. In this way, the disk is provided with a surface topography that contains a controlled texture, for example in the area of the disk's start/stop track. In an embodiment of the invention, an ultrasonic probe and a disk shaped substrate member are placed in close proximity within a container that holds a fluid abrasive slurry, i.e. a suspension of hard particles in a liquid. Operation of the ultrasonic probe, as the substrate member rotates, causes the slurry to texture an adjacent portion of the substrate member by means of plastic deformation and in the absence of material removal from the substrate member. Operation of the probe thus provides texturing of the disk at an inner diameter track area thereof, for example in the disk's start/stop area.

Abstract: The processes of the invention enable depositable PFSA to be provided over he entire inner surface of hollow fibers. Additionally, the processes of this invention provide a fiber which is coated by a thin coating of PFSA which is approximately 5-40 .mu.m thick. The fiber can advantageously withstand pressure gradients between 20-75 psig throughout its wall before leakage.

Abstract: A room temperature curing polyurethane composition is bonded to the surface f cables having jackets of an olefin/ester interpolymer to provide a water resistant seal thereabout by first exposing the surface of a length of cable to an alkali metal hydroxide solution to hydrolyze the functional ester groups and thereby substitute hydroxyl groups for the organic acid of the ester in the interpolymer at the surface of the jacket. A diisocyanate primer is applied to the treated surface and it interacts with the hydroxyl groups to produce pendant reactive groups. A room temperature curing urethane prepolymer composition is then molded about the primed surface at ambient temperatures and the unreacted hydroxyl groups along the urethane prepolymer chain react with the pendant reactive groups of the jacket to produce a firmly bonded overmolding on the jacket.