Abstract: This invention is an adhesive paste that consists essentially of a polymeric resin in particulate form and a carrier for the resin. The polymeric resin is present as particles with a particles size of 50 microns or smaller, is insoluble in the carrier at ambient temperature, and is soluble in the carrier at a temperature above ambient temperature. The carrier either reacts with the resin to form a covalent bond, or vaporizes from the adhesive paste, at a temperature above the temperature at which the resin is soluble in the carrier. The paste contains no inorganic fillers, holds its geometry on application, and fuses to a void-free bond.

Abstract: A flexible, high dielectric constant polyimide film composed of either a single layer of an adhesive thermoplastic polyimide film or a multilayer polyimide film having adhesive thermoplastic polyimide film layers bonded to one or both sides of the film and having dispersed in at least one of the polyimide layers from 4 to 85 weight % of a ferroelectric ceramic filler, such as barium titanate or polyimide coated barium titanate, and having a dielectric constant of from 4 to 60. The high dielectric constant polyimide film can be used in electronic circuitry and electronic components such as multilayer printed circuits, flexible circuits, semiconductor packaging and buried film capacitors.

Abstract: A layer of base material has a film layer and a barrier layer on the film layer, and also adhesive tape has the base material and an adhesive layer on the barrier layer. Thus, they do not have any fish-eye or foreign substance on their surfaces, so that accuracy in thickness are improved and contamination of a material to be adhered with the adhesive layer is also improved.

Abstract: A cohesive product that has one or more layers of a substrate and a synthetic water-based cohesive polymer that is applied to the substrate and defines an outer surface of the product. The synthetic water-based cohesive polymer is an inherently crystalline elastomer whose polycrystalline structure has been disrupted such that the elastomer possesses a cohesive property.

Abstract: Pressure-sensitive hotmelt adhesive composition based on non-thermoplastic elastomers, obtained bya) preparing, as the preliminary batch, a composition comprising the elastomers and one or more of the following additives such as fillers, anti-ageing agents, plasticizers and tackifier resins in an intensively shearing, intensively cooling mixer and without solvent, the composition having a final temperature of from 100.degree. C. to 160.degree. C.,b) mixing and homogenizing the preliminary batch in a second mixer with one or more of the following additives such as fillers, anti-ageing agents, plasticizers and tackifier resins, without solvent, the composition having a final temperature of from 100.degree. C. to 160.degree. C.,where the total residence time of the composition at temperatures over 100.degree. C. does not exceed a figure of 6 minutes, so that the resulting hotmelt adhesive composition has a viscosity of more than 900 Pa*s, in particular from 900 Pa*s to 1200 Pa*s, at 130.degree. C.

Abstract: Described is an adhesive containing a polycarbodiimide resin having repeating units represented by the following formula:.paren open-st.R--N.dbd.C.dbd.N.paren close-st..sub.nwherein R is a divalent hydrocarbon group and n is an integer of 5 to 250, and also described is a flexible printed circuit board and a coverlay film fabricated using the above-described polycarbodiimide resin-containing adhesive.

Abstract: The present invention relates to a white laminated polyester film comprising:a polyester base film having a transmission density of not less than 0.2 and hue b value of the surface thereof of not more than 2; andan adhesive layer laminated on at least one side of the polyester base film, which adhesive layer is formed by applying a coating solution comprising a polyvinyl alcohol resin and a water-soluble resin, a water-dispersible resin or a mixture thereof.

Abstract: An adhesive composition comprising a thermosetting powder adhesive adhered to a thermoplastic non-woven web adhesive, and processes for making the same. The thermosetting powder adhesive component is preferably a polyester, a polyester-polyurethane, an epoxy or an epoxy-polyester hybrid. The thermoplastic non-woven web adhesive component is preferably an ethylene-vinyl acetate copolymer, a polyester, a polyolefin, or a polyamide. The adhesive composition provides superior bonding between vinyl and/or cloth coverings and a variety of surfaces including metal, plastic, rubber and wood. There is also disclosed herein a composite article that comprises an adhesive layer made from the aforementioned adhesive composition and a substrate layer, and processes for making the same.

Abstract: A hydrophilic, pressure-sensitive adhesive composition prepared by irradiating solid poly(N-vinyl lactam) with ionizing radiation to crosslink the poly(N-vinyl lactam) and thereafter mixing the radiation-crosslinked poly(N-vinyl lactam) with essentially unirradiated plasticizer in an amount sufficient to form a cohesive, pressure-sensitive adhesive composition. The composition is useful as a biomedical adhesive for transmitting or receiving electrical signals as a component (14) of a biomedical electrode (10).

Abstract: An oriented polyester film coated on at least one surface with a coating that improves its adhesion to gelatin is disclosed. The dry coating contains one or more sulfopolyesters; one or more tetrablock copolymer resins; and one or more non-volatile polyamines. Other ingredients, such as particulate materials and surfactants, may be present in the coating. The coating is preferably applied at the interdraw stage.

Abstract: An adhesive-applied tape prepared by coating a support film with a solution obtained by dissolving in an organic solvent a mixture of an epoxy resin and an amorphous polyimidosiloxane produced from an aromatic tetracarboxylic dianhydride or its derivative and a diamine comprising an aromatic diamine which comprises an aromatic diamine having a functional group which can react with an epoxy group and a diaminopolysiloxane, and then drying it at a temperature at which the epoxy resin is not cured to provide a tack-free adhesive layer with no surface tackiness. The tape is both flexible and heat resistant, and does not require high-temperature, high-pressure contact bonding conditions upon contact bonding.

Abstract: A saturated polyester obtained by a reaction of a polycarboxylic acid component comprising a polycarboxylic acid having 2 to 6 carbon atoms in the main chain (e.g. maleic anhydride), and a polyol component comprising a polyhydric alcohol having 2 to 4 carbon atoms or its condensate is used as a cement retarder. A retardative sheet can be formed by applying or impregnating a composition comprising the retarder and a tacky adhesive to a base sheet. By forming a predetermined pattern with the use of the retarder or sheet in a form, depositing a mortar composition, washing a surface of the hardened concrete, and washing out uncured mortar, a figure or a washing finished surface is formed on a surface of a concrete product.

Abstract: A heat-transfer label that may be used, for example, to decorate clear glass articles in such a way as to give such articles the appearance of having been frosted. In a preferred embodiment, the label includes (a) a support portion in the form of a sheet of paper overcoated with a release layer of polyethylene, (b) a skim coat of wax overcoated onto the polyethylene release layer and (c) a transfer portion, the transfer portion including a protective lacquer layer printed onto the skim coat, an ink layer printed onto the protective lacquer layer, and an adhesive layer printed onto the ink layer, as well as onto any exposed portions of the underlying protective lacquer layer and onto a surrounding area of the skim coat. The protective lacquer layer comprises a solvent-soluble phenoxy resin that has been cross-linked by a melamine resin. The ink layer comprises a design printed with a frosted ink, the frosted ink preferably comprising a solvent-soluble phenoxy resin, a silica and a colorant.

Abstract: An adhesive composition or structure is proposed for use in skin application, e.g. drug delivery wound care, or for attaching devices to collect body waste to the wearer. The composition comprises (a) a polymer or mixture of polymers which act as a pressure-sensitive adhesive present in an amount 20-60 parts by weight of the adhesive composition; and (b) a water-swellable polymer present in an amount 20-80 parts by weight of the adhesive composition. The polymer is one which will absorb from 50 to 500 grams of pure water per 100 grams of water-swellable polymer.Additionally there may be present up to 30 parts by weight (of the adhesive composition) of a water-soluble polymer.The water-swellable polymer may be provided as a coating on non-water-soluble and non-water-swellable fibers which limit swelling of the coating to be radial of the fibers. By arranging or aligning the fibers, the direction of swelling of the composition or structure can be controlled.

Abstract: A reinforcing tape for a slide fastener is disclosed. The reinforcing tape to be bonded to the end portion of a fastener tape comprises a reinforcing layer formed of a polyester elastomer film manifesting a modulus of elasticity in bending in the range of 3,000 to 5,000 kg/cm.sup.2 and an adhesive layer. Preferably a polyester-based hot-melt adhesive is used for the adhesive layer.

Abstract: A silicone adhesive film comprising (A) a biaxially oriented aromatic polyester film, and (B) a crosslinked primer layer which is present on at least one surface of the aromatic polyester film and is formed of a crosslinked polymer of (a) alkoxysilane having a functional group selected from the group consisting of an epoxy group, vinyl group and mercaptoalkyl group and (b) alkoxysilane having an amino group; a production method thereof; and a release film.

Abstract: A heat-transfer label well-suited for use in decorating silane-treated glass articles. In a preferred embodiment, the label exhibits good scuff resistance, is capable of withstanding pasteurization conditions on a silane-treated glass article and includes (a) a support portion in the form of a sheet of paper overcoated with a release layer of polyethylene, (b) a skim coat of wax overcoated onto the polyethylene release layer and (c) a transfer portion, the transfer portion including a cross-linked phenoxy protective lacquer layer printed onto the skim coat, a polyester ink layer printed onto the protective lacquer layer, and an adhesive layer printed onto the ink layer, as well as onto any exposed portions of the underlying protective lacquer layer and onto a surrounding area of the skim coat. The cross-linked phenoxy resin comprises a solvent-soluble phenoxy resin of the formula ##STR1## wherein the solvent-soluble phenoxy resin is cross-linked by a melamine formaldehyde resin.

Abstract: A delayed-tack adhesive composition exhibiting a high tack strength even for adherends made of non-polar materials such as polyethylene and polypropylene, which comprises a (co)polymer prepared by the use of a radical-polymerizable monomer having a straight-chain or branched alkyl group having 9 to 18 carbon atoms and a plasticizer being solid at ordinary temperatures.

Abstract: A coated abrasive article comprises a backing, a first binder on the backing, and a plurality of abrasive particles in the first binder. The first binder precursor is an energy-curable preferably, melt-processable resin containing an epoxy resin, an ethylene-vinyl acetate copolymer, and a curing agent for crosslinking the epoxy resin that is cured to provide a crosslinked make coating. The above binder precursors of the invention are preferably free of homopolymers and copolymers of olefinic monomers. In another aspect, the invention also describes an energy curable first binder precursor containing an epoxy resin, an ethylene-vinyl acetate copolymer, a polyfunctional acrylate component and a curing agent for crosslinking the epoxy resin that is cured to provide a crosslinked make coating. The invention also relates to a method of producing such coated abrasive articles and a surface-treated backing material.

Abstract: A multi-layer article comprises a fluoropolymer layer comprising interpolymerized units derived from vinylidene fluoride, and a melt-processable, substantially non-fluorinated polymer layer comprising a polyamide, polyimide, polyurethane, or a carboxyl, anhydride, or imide functionalized polyolefin. The non-fluorinated polymer layer further contains an aliphatic di-, or polyamine which provides increased adhesion between the fluoropolymer layer and the non-fluorinated polymer layer.

Abstract: A patch for repair or finishing of surfaces, such as drywall or plaster walls and ceilings, wherein the patch includes a liquid-hardenable material (such as a water-hardenable material) coated on and/or impregnated in a substrate or carrier. The patch is wetted and then applied to the surface of the wall or ceiling and pressed against the surface. The liquid-hardenable material becomes gel-like and adheres the patch to the surface. Upon drying, it sets to a hard coating overlying a hole, crack, recess or joint in the wall or ceiling. If necessary, joint compound or the like can be applied to the edges of the patch to provide a smooth taper to the surrounding surface. The liquid-hardenable material can be a cement, plaster, resin or glass composition. The carrier can be paper, or a fabric comprised of natural or synthetic fibers.

Abstract: Acrylate copolymer pressure sensitive adhesives (PSAs) which incorporate relatively small amounts of a plasticizer are disclosed. The resulting PSAs exhibit improved low temperature performance and minimal effect on other properties, when used as adhesives for graphic marking films. The adhesive system has been found to allow the graphic marking film to be applied at temperatures as low as 20.degree. F. (-7.degree. C.) and to improve the ability of the film to be applied to a substrate without trapping air between the marking film and the substrate. The adhesive system of the marking film also demonstrates resistance to tenting around the compound curved surfaces of rivet heads and corrugations typical of truck trailer sides.

Abstract: An article for enhancing an athletic implement grip where the article comprises a carrier material which is impregnated with a mixture utilizing a tacky adhesive and a thickener. The mixture is applied in sufficient quantities to the grip so as to permit retention of a portion of the mixture to the carrier and removal of a portion of the mixture when the impregnated carrier material contacts an athletic implement grip.

Abstract: A solid adhesive having adhesive resins, benzylidene sorbitol, isothyazoline preservatives, organic solvents, and about 25-60% water, the components being balanced such that the solid adhesive has good formability or shapability. A stick-shaped solid adhesive product made from the solid adhesive has a unique combination of shape-maintainability, bending strength, and crush strength.

Abstract: A multilayer film useful for making plastic adhesive labels for glass substrates such as glass bottles. The multilayer films contain a base layer, an adhesive layer, and optionally an intermediate layer to improve interlayer bonding between the base layer and the adhesive layer. The adhesive layer comprises a heat-activated thermoplastic adhesive that is not tacky at room temperature. Films of the present invention are sufficiently non blocking at room temperature so as to not require the use of a separate release liner. The film can be utilized in conventional graphics printing operations and made into labels. Labels made from films of the present invention can be thermally adhered to glass substrates and exhibit sufficient adhesion to glass substrates to withstand washing/rinsing, filling, and pasteurization processes utilized in the bottling industry.

Abstract: An energy beam curable hydrophilic pressure sensitive adhesive composition comprising a hydrophilic pressure sensitive adhesive (A) and an energy beam polymerizable compound (B), optionally together with a photopolymerization initiator (C) added according to necessity. Thus, a pressure sensitive adhesive composition suitable for use in a wafer surface protective sheet is provided, which enables easy removal of any residual pressure sensitive adhesive by washing with water, even if the pressure sensitive adhesive remains on the wafer surface after peeling of the pressure sensitive adhesive sheet.

Abstract: A composite film for forming a resinous coating film on a surface of a to-be-coated material. The composite film has at least one water-soluble resinous coating film, at least one of which is formed on a surface of the composite film which is brought into contact with the surface of the to-be-coated material closely, and a base sheet to which the water-soluble resinous coating film adheres and transmits light therethrough. The water-soluble resinous coating film formed on the surface of the composite film which is brought into contact with the surface of the to-be-coated material closely is hardened in close contact with the to-be-coated material, with water interposed between the water-soluble resinous coating film and the to-be-coated material and adheres to the to-be-coated material to form a water-insoluble coating film. It is preferable that the application amount of the water is in a range of 1.5 g/m.sup.2 -10 g/m.sup.2.

Abstract: A sheet for protecting paint film comprising a support having formed thereon a rubber adhesive layer comprising an isobutylene polymer having a degree of dispersion of from 1 to 2.3 and a weight average molecular weight of 300,000 to 600,000 (the domain A in the FIGURE) as the base polymer.The paint film protecting sheet has the compatibility of the prevention of the occurrence of a microdeformation and a good peelability. That is, when an article such as automobiles having a paint film applied with the protecting sheet is placed outdoors for a long period of time at high temperature, the paint film is hard to deform and the sheet can be easily peeled even after adhering for a long period of time.

Abstract: A cover tape adapted to seal individual components in respective recesses of a carrier tape or a two dimensional carrier tray, including a randomly embossed layer, an adhesive layer covered over one side of the randomly embossed layer, and a non-adhesive layer adhered to the adhesive layer to prevent the components from adhering to the adhesive layer, the randomly embossed layer including an adhesion portion adapted for fastening to the carrier tape through the adhesive layer, a torn strip portion adapted to enhance the cohesive strength of the randomly embossed layer through the non-adhesive layer, and a stress concentration zone disposed between the contact border line of the adhesion portion and the contact border line of the non-adhesive layer, the torn strip portion being peeled off from the adhesion portion along the stress concentration zone before the removal of the encased components from the carrier tape, the applied tearing force to peel off the torn strip portion from the adhesion portion along th

Abstract: Disclosed is a high voltage electric appliance comprising electric coils whose conductors are wrapped by an insulating tape with subsequent impregnation of thermosetting resin for the electrical insulation. The insulating tape is a laminated body consisting of a built-up mica of fine mica particles and synthetic pulp or a paraffin powder and a reinforcing member. The bonding among the fine mica particles and between the fine mica particles and the reinforcing material is effected by the synthetic pulp as melted and solidified.

Abstract: A polymeric imaging medium comprising a receptor layer and a polyvinyl chloride backing layer particularly useful in electrophotographic printing processes with liquid toners comprising thermoplastic toner particles in a liquid carrier that is not a solvent for the particles at a first temperature and that is a solvent for the particles at a second temperature or with dry toner, methods of imaging such a medium, and such an imaged medium.

Abstract: Disclosed is an essentially odorless water dissipatable or dispersible adhesive composition that is useful in forming paper articles and other products that can be recycled through repulping in both neutral and alkaline media. The water dispersible adhesive composition is preferably a hot melt adhesive that is a low molecular weight, branched copolyester containing a sulfomonomer. The copolyester adhesive composition can be used neat or formulated and exhibits broad compatibility with a variety of adhesive additives, including non polar tackifiers.

Abstract: A method for protecting a substrate sheet such as a conductive foil suitable for use in the manufacture of printed circuit boards involving applying a lamination mold-release layer to one side of a protective film, and applying a preferably electron beam curable adhesive pressure-sensitive coating to the other side of the film, curing the adhesive coating, and laminating the protective film to the foil or other substrate sheet, which, in turn, may be laminated to other substrates such as dielectric sheets.

Abstract: A sandblast mask laminate useful in sandblasting operations is disclosed. The laminate comprises a photoresist mask layer, a pressure sensitive adhesive composition comprising a non-elastomeric resin and a tackifier in combination to produce a composition having a T.sub.g of less than about -40.degree. C., a carrier film layer and a release liner.

Abstract: The present invention is directed to a printable release composition used for pressure sensitive labels and the like. The invention is also directed to an article, such as a label, that comprises a substrate such as paper, optionally a thermal transfer primer coating coated onto the substrate and a release layer coated onto the transfer primer coating or onto the substrate. The printable release composition of the present invention may be used with labels having permanent, repositionable or removable adhesives. The particular composition of the release layer depends on the type of adhesive that is appropriate for the desired end use.

Abstract: A joint sealing tape preferably has the following composition in mass %: 35 to 36% of a premix comprising 73 to 75% of a soft grade of bitumen, 18 to 19% rubber and 7 to 8% of comminuted tire rubber; 31 to 32% of a soft ge of bitumen; 19 to 20% ground slate; 11 to 12% cellulose powder; and 2% silicon dioxide.

Abstract: A coextruded biaxially oriented polyolefin packaging film has a cold seal release layer, a core layer, and a cold seal receptive skin layer. The release layer is made of (A) about 10% to about 60% by weight ethylene-butylene random copolymer containing between 0% and about 6.0% by weight ethylene and between about 94% and 100% by weight butylene; (B) a blend of two polymers selected from the group consisting of polyethylene ionomers, syndiotactic homopolymer polypropylene, conventional polyethylenes having densities of between 0.91 and 0.965 gm/cm.sup.3, and metallocene-catalyzed polyethylene plastomers; and optionally (C) a non-migratory slip agent present in an amount sufficient to decrease the coefficient of friction of the release layer. Alternatively, the release layer may be made of a two-component blend of the ethylene-butylene random copolymer and high density polyethylene.

Abstract: A process for making an adhesive comprising allowing a carrier web coated with a thermal free-radically polymerizable mixture to remain in a heat exchange medium for a time sufficient to subdue the reaction exotherm and maintain a reaction temperature by thermal contact of the polymerizable mixture with the heat exchange medium and to affect conversion of the coating to an adhesive layer, preferably to a pressure sensitive adhesive layer, wherein the coating is a substantially solvent-free thermally initiated polymerizable mixture comprised of at least one free radical monomer, at least one thermal initiator, optionally, at least one cross-linker and optionally, at least one co-monomer.

Abstract: Two-component curable adhesive for blocking automotive wiring bundles, the respective components preferably amine-terminated polyamide Part A, and acrylate, anhydride or epoxy Part B, being contained in separate sheets which are inter-leaved with one another. The concentration of the reactive components in the sheets is chosen to cause the adhesive to flow on initial heating and then to cure to resist further flow at elevated temperatures in service. Apparatus, kits and method for blocking cables or wire bundles using the adhesive are also claimed.

Abstract: A heat-transfer label that is particularly well-suited for decorating treated low-density polyethylene (LDPE) containers and that exhibits strong resistance to degradation from animal fats and the like, even when subjected to flexing. In a preferred embodiment, the label includes a support, a wax release layer over the support and a transfer portion over the wax release layer. The transfer portion includes a protective lacquer layer, the protective lacquer layer comprising a pair of cross-linked polyester resins and a cross-linked vinyl resin, each of said cross-linked resins being cross-linked by a hexamethoxymethylmelamine resin. The transfer portion also includes an ink layer over the protective lacquer layer, the ink layer comprising a polyamide ink. The transfer portion further includes an adhesive layer over the ink layer, the adhesive layer comprising nitrocellulose and a soft polyamide resin.

Abstract: Self-adhesive protective film, in particular for cars, characterized in that a self-adhesive composition is applied to a film as support, the film consisting of a mixture of40 parts by weight to 70 parts by weight of polyethylene,20 parts by weight to 40 parts by weight of polypropylene,8 parts by weight to 15 parts by weight of titanium dioxide,0.3 part by weight to 0.7 part by weight of light stabilizers, andthe self-adhesive composition consisting of polyethylene vinyl acetatehaving a vinyl acetate content of from 40 mol-% to 80 mol-%, especially 70 mol-%, andhaving a loss angle tan .delta. of from 0.6 to 1.0, measured at a temperature of 60.degree. C. and a frequency of 10.sup.-2 Hz, and from 0.4 to 0.7, measured at a temperature of 60.degree. C. in a frequency of 10 Hz.

Abstract: A reusable display holder, easel, copyboard or work board utilizes a tacky pressure sensitive adhesive for temporarily holding display materials, photographic prints and like products securely in position; or for capturing and retaining residue and debris falling from work pieces; or for other similar applications. When used with photographic exposure apparatus, for example, the board comprises an easel which allows exposure of multiple sizes of photographic prints or enlargements without changing the easel in any way and without using devices to position or secure the prints. The board or easel includes one or more trays of various dimensions depending on the particular application. A tacky pressure sensitive adhesive composition is poured into each tray to hold various products. The composition has readhesion properties which enable products to be removed, without damage, and then readhered to the composition.

Abstract: Described is an adhesive containing a polycarbodiimide resin having repeating units represented by the following formula:.paren open-st.R--N.dbd.C.dbd.N.paren close-st..sub.nwherein R is a divalent hydrocarbon group and n is an integer of 5 to 250, and also described is a flexible printed circuit board and a coverlay film fabricated using the above-described polycarbodiimide resin-containing adhesive.

Abstract: A heat-resistant anti-static pressure-sensitive adhesive tape comprising a substrate having coated thereon an acrylic microparticulate adhesive having an average diameter of at least about 1 micrometer, wherein the microparticles have a surface bearing thereon a conductive material formed from a polymer electrolyte base polymer, and at least one ionic salt selected from the group consisting of salts of alkali metals and salts of alkaline earth metals, and at least one thermal stabilizer selected from the group consisting of hindered amines, salts of substituted toluimidazoles, and mixtures thereof, said substituted toluimidazoles having the formula: ##STR1## wherein R.sub.1 is selected from the group consisting of hydrogen, a methyl group, an ethyl group and a propyl group, R.sub.

Abstract: A multi-layer film substrate comprising at least two laminated insulating layers composed of a polyimide having a low thermal expansion, wherein an adhesion layer composed of an Si-containing or SiO.sub.2 -dispersed polyimide is interposed between the low thermal expansion polyimide layers. The substrate is produced by laminating at least two insulating layers composed of a polyimide having a low thermal expansion, wherein the low thermal expansion polyimide layers are laminated through an adhesion layer composed of an Si-containing or SiO.sub.2 -dispersed polyimide.

Abstract: A multi-cycle refastenable contact responsive non-tacky fastener system and method of use with a field of a contact responsive fastening layer having essentially no surface tack. The fastening layer is multiply releasable and refastenable against a non-tacky target surface, and has substantially constant 90.degree. peel strength of less than about 5 kN/m when in contact with the target surface. A mounting layer comprises a field of a pressure sensitive adhesive onto which the field of the contact responsive layer is directly attached.

Abstract: An adhesive tape for electronic parts, comprising(a) a heat resistant base film, and(b) an adhesive layer laminated on at least one surface of said base film, said adhesive layer comprising(i) a resol type phenol resin, and(ii) an acrylonitrile/butadiene copolymer,in a proportion of from 100 to 500 parts by weight of said resol type phenol resin per 100 parts by weight of said acrylonitrile/butadiene copolymer,said resol type phenol resin being selected from the group consisting of bisphenol A type resins, alkylphenol type resins, phenol type resins and their co-condensed type phenol resins which contain as the phenol component at least one member selected from the group consisting of bisphenol A, alkylphenols and phenol.

Abstract: The present invention relates generally to a multi-layer lidding film and a package with the lidding film heat-sealed thereto as a cover. The multi-layer film comprises: 1) a support layer, such as polyester, 2) a non-crosslinked amorphous acrylic interface layer, and 3) an outer copolyester heat seal layer. The acrylic interface layer advantageously limits the peel strength of the heat seal, making it easy for consumers to open the lidded package while still provides heat seal reliability and allowing the film to be heat-sealed to the package.

Abstract: Disclosed is a tape which comprises a non-tacky, free-standing, 90 to 100% imidized polyimide film containing 0.1 to 30 wt % of a solvent having a releasable film adhering to at least one side. The film is used to form coatings on substrate or as an adhesive to bond substrates together.

Abstract: This invention provide an adhesive tape and a liquid adhesive for electronic parts having sufficient thermal resistance and reliability. The adhesive tape comprises an adhesive layer composed of at least a polyimide comprising the repeating units represented by the formulas (1) and (2), provided on surface of a heat resistance film or a release film: ##STR1## wherein X is --SO.sub.2 -- and/or --C(.dbd.O)--OCH.sub.2 CH.sub.2 O--C(.dbd.O)--, Ar is a divalent group containing aromatic rings, and R is an alkylene group having 1 to 10 carbon atoms or --CH.sub.2 OC.sub.6 H.sub.4 --, and n means an integer of 1 to 20.