Abstract: A packaging material which is capable of packaging an article(s) in a closely fitted and tightly sealed state and consists essentially of a composite film stretched at least in one direction,said composite film comprising a base film and a surface film provided on at least one surface of the base film and having certain specific shrinkage characteristics,said base film being made of a resin composition comprising a propylene polymer, andsaid surface film being made of a polymer composition comprising at least two of (A) a copolymer of propylene and ethylene in a weight proportion of 99.5:0.5 to 90:10, (B) a copolymer of propylene and an .alpha.-olefin having 4 to 10 carbon atoms in a weight proportion of 70:30 to 95:5 and (C) a copolymer of butene and any other .alpha.-olefin having 2 to 10 carbon atoms in a weight proportion of 70:30 to 99:1, each of the copolymers being in an amount of 10 to 90% by weight on the total weight of the copolymers.

Abstract: Multi-ply laminae are provided which are suitable for use as tell-tale indicators for identification cards, credentials and the like. The laminae are post-laminated to a core layer bearing a photograph or similar information or indicia. Thereafter attempts to delaminate the card result in fibers being torn from a uniaxially oriented polyethylene or polypropylene layer of the laminae. Attempts to readhere the layers with adhesives result in tell-tale indicia in the form of the torn fibers which cannot be adequately realigned or adhered so as to be unnoticeable. Moreover, attempts to heat seal the card after tampering causes the oriented polymer to shrink and opacify resulting in additional tell-tale indicia of tampering. In addition, the core comprises heat seal surfaces upon which printing and other indicia is placed whereby any attempt to alter the printing or other indicia results in destruction of the card.

Abstract: A plastic composite construction and process for its preparation are disclosed in which the composite comprises a plastic core or center of extended surface area. The composite includes a metallic layer on at least one face of the core and an elastomeric layer, such as of a butyl rubber, adhered to an opposite face of the core. The addition of an elastomeric layer converts the composite to an energy-absorbing construction of substantially improved impact resistance which avoids the normal cracking or spalling of the metallic layer upon impact. The present plastic composite may have an impact resistance of at least seven foot pounds at minus 30.degree. F. The plastic composite can be used as an exterior mirror housing and the like for vehicles.

Abstract: This invention relates to a blend of a vinyl aromatic-diene block copolymer rubber and a nitrile barrier resin, and to the use of this mixture as a tie-layer to adhere a nitrile barrier resin to a thermoplastic resin.

Abstract: Biaxially oriented polypropylene films are extrusion coated with an ethylene-vinyl acetate copolymer coating to yield a coated film product exhibiting heat-seals which are peelable and which exhibit good heat-seal strengths.

Abstract: A multi-layer laminate comprising at least one A-B double layer structure, characterized in that said layer A is a layer comprising at least one material selected from the group consisting of olefin polymers, polyamide polymers, acrylate polymers, polyether polymers, polycarbonate polymers, polyurethane polymers, vinylidene chloride polymers, thermosetting resins, vulcanized rubbers, glass and papers and said layer B is a layer comprising mainly a modified block copolymer in which an unsaturated carboxylic acid or its derivative is grafted on a styrene-butadiene block copolymer. Said laminate is excellent in interlaminar adhesion, i.e. peeling strength.

Abstract: A heat-shrinkable multilayer film suitable for use in the packaging of a frozen poultry, includes a first outer layer comprising a blend of a propylene-ethylene copolymer having a high isotactic molecular structure with less than about 6% by weight ethylene and having a melt flow of from about 1.5 to about 18 decigrams per minute; a (butene-1)-ethylene copolymer having a high isotactic molecular structure with less than about 10% by weight being ethylene and having a melt flow of from about 0.1 to about 5.

Abstract: A non-invasive birth control device in the form of a custom-formed, valved cervical cap is disclosed. The cervical cap comprises a cup-shaped elastomeric shell substantially complementary with contiguous surface of portio vaginalis cervicis when in contact therewith and having an aperture at the apex of the shell. The aperture is covered by an elastomeric web secured to the shell and defines, together with the shell, a one-way valve means having a discharge port offset from the aperture. The cervical cap can be fabricated from a specially designed blank of a thermoplastic elastomeric material using a replica of cervix uteri as a mold.

Abstract: Disclosed is a retort-sterilizable laminated pouch having an excellent loading pressure resistance, which comprises two laminated sheets, each comprising a flexible gas-barrier substrate and a heat-sealable crystalline olefin resin layer formed on one surface of said substrate, said laminated sheets being piled in the form of a pouch where the olefin resin layers confront each other and the periphery of the pouch of the piled sheets being heat-sealed, wherein the crystalline olefin resin layer is composed of polyethylene having a flow ratio (Kp), defined by the following formula, of at least 165: ##EQU1## wherein MI.sub.2 stands for the melt index (g/10 min) as determined according to the condition E of ASTM D-1238 and MI.sub.20 stands for the melt index (g/10 min) as determined according to the condition E of ASTM D-1238 except that the load is changed to 20.0 Kg and the sample collecting time is changed to 30 seconds, and a density of at least 0.935 g/cc.

Abstract: A magnetic recording element comprising a magnetic recording layer on a surface of a synthetic resin support and an antistatic layer on the opposite surface of said synthetic resin support, wherein said antistatic layer comprises a powder of a white or light-colored pigment and a powder of a carbon type electrically conductive substance in a binder, said pigment powder being substantially all in the outer surface portion of said antistatic layer and said electrically conductive powder being substantially all in the portion of said antistatic layer adjacent said support is disclosed.

Abstract: Laminar thermoplastic film constructions comprising a layer of low density polyethylene bonded to a layer of a dissimilar polymer blend comprising high density polyethylene and polyethylene copolymers. In particular such copolymers comprise polyethylene copolymerized with another alpha olefin containing from about 3 up to about 15 carbon atoms. Such copolymers are also characterized by being linear, low density polymers having densities which are below about 0.94 grams/cc.

Abstract: Multiple-layer, heat-sealable films comprising a substrate layer of polypropylene homopolymer or polypropylene copolymer, or blends thereof with compatible polyolefins; and at least one heat-sealable surface layer of a blend comprising a copolymer of ethylene and a higher olefin, and a different copolymer of higher olefins. The films are prepared by extrusion coating or coextrusion and can be oriented.

Abstract: A biaxially-stretched polypropylene composite film comprises a biaxially-stretched substrate film of a crystalline polypropylene and a monoaxially- or biaxially-stretched film of a resin composition bonded in laminated state to at least one surface of the substrate film, the resin composition comprising 96 to 50 percent (by weight) of a propylene copolymer (a), 3 to 30 percent of a polybutene-1 (b), and 1 to 20 percent of an ethylene-propylene-butene-1 random copolymer (c). The propylene copolymer (a) is an ethylene-propylene random copolymer (a.sub.1), an ethylene-propylene-butene-1 random copolymer (a.sub.2), or a mixture (a.sub.3) of at least two kinds of copolymers each of at least two monomers selected from ethylene, propylene, and butene-1. The resin composition comprising the components (a), (b) and (c) is also provided and is characterized by its capability of being heat sealed at low temperatures.

Abstract: A heat sealable packaging material comprising (A) a stretched base layer formed of a propylene polymer and (B) a stretched surface layer formed of a blend of a propylene-ethylene copolymer and a C.sub.4 -C.sub.10 .alpha.-olefin-propylene copolymer in a weight proportion of 20:80 to 94:6 by weight on at least one surface of said base layer.

Abstract: A moisture-impervious plastic container thermally formed from a coextruded sheet including a layer of polypropylene directly adhered to a layer of butadiene-styrene polymer.

Abstract: A document feeding belt for the use of an automatic document feeding apparatus in that at least two layers one of which is an internal layer composed of flexible material and the other is an external layer composed of flexible material that is hard to be stained, are used.

Abstract: A collapsible dispensing container having a laminated tubular body, the laminated tubular body including a metal foil layer, and a layer of a copolymer resulting from the polymerization of 100 parts by weight of (a) at least 50 percent by weight of at least one nitrile having the structure ##STR1## wherein R is hydrogen, a lower alkyl group having from 1 to 4 carbon atoms, or a halogen, and (b) up to 50 percent by weight based on the combined weight of (a) and (b) of an ester having the structure ##STR2## wherein R.sub.1 is hydrogen, an alkyl group having from 1 to 4 carbon atoms or a halogen, and R.sub.

Abstract: A waterproofing sheet material useful for example as a free floating membrane or flashing material in roofing applications, a pond liner, or a gasketing material, composed of from about 15 wt. % to about 80 wt. % of an ingredient selected from the group consisting of:(a) homopolymers of alkaldienes and substituted alkadienes(b) addition copolymers of alkadienes with unsaturated monomers(c) homopolymers of alkenes and substituted alkenes selected from the group consisting of polyethylene, chlorosulfonated polyethylene and polyisobutylene(d) resin acids and resin acid derivatives(e) highly aromatic bituminous materials, and(f) pine oiland from about 85 wt. % to about 20 wt. % of a plasticized polyvinyl butyral resin. Minor amounts of fatty acids and paraffin wax may be added to improve low temperature properties and to facilitate processing a hot melt admixture of the ingredients into a sheet.

Abstract: A molded container having a wall composed of a thermoplastic resin oriented in at least one direction on the wall face, wherein the container wall has a layer of a blend composed mainly of a plurality of melt-extrudable thermoplastic resins, each of which has a solubility parameter (Sp) of at least 9.5, at least one of said thermoplastic resins has an oxygen permeability lower than 5.times.10.sup.-11 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg, said thermoplastic resins are chosen so that the difference (.DELTA.Sp) of the solubility parameter in said thermoplastic resins is not greater than 4.5, the elongation of said resin blend is higher than the arithmetic mean (.epsilon.) of elongations of the respective thermoplastic resins, and wherein the container has a thermal shrinkability (.delta.) of at least 5% in the orientation direction of said container wall.

Abstract: A non-tacky powder composition useful for coating applications is disclosed. A method of preparing the non-tacky powder composition is also disclosed. This powder composition comprises tacky powder particles and, adhering to the tacky surface of these tacky powder particles in a non-continuous layer, smaller solid particles which are hard and non-tacky. The tacky powder particles comprise a melt blend mixture of a thermoplastic elastomer and a specifically defined melt flow modifier. The smaller solid particles which are hard and non-tacky comprise a specifically defined melt flow modifier which has a glass transition temperature greater than about 20.degree. C. The final powder composition is non-tacky and is particularly useful in coating glass containers. A process for coating substrates such as a glass container with this composition, as well as the coated glass container, is also disclosed.

Abstract: A blend of a styrene-butadiene block copolymer rubber, a nitrile barrier resin, and a high impact polystyrene is used as a tie layer to adhere together co-extruded nitrile barrier resin and high impact polystyrene.

Abstract: A polyolefin-paper laminate comprising (a) a base paper, (b) a copolymer of (1) at least one diene monomer and (2) at least one monovinyl substituted aromatic compound incorporated into or coated on the base paper, and (c) an extrusion coated polyolefin layer thereon. The base paper (a) impregnated with or coated with the copolymer (b) can be optionally subjected to a corona discharge treatment prior to extrusion coating of the polyolefin layer (c).

Abstract: A thermoplastic multi-layer foil structure comprises a styrenic polymer layer and an olefinic polymer layer bonded by an intermediary polymer layer comprising at least one layer constituted by a bonding agent. In this multi-layer structure, at least one layer containing scrap produced from said multi-layer foil structure is included in the latter, said scrap-containing layer including a mixture of said scrap with a convenient proportion of a graft copolymer of a styrenic monomer on a polyolefinic substrate.

Abstract: A composite or laminate comprised of a high nitrile copolymer, preferably 55 to 95 percent of acrylonitrile, with alkyl acrylate or methacrylate and styrene or butadiene adhered to an olefin based polymer with a two-phase block polymer adhesive, said adhesive comprising an elastomeric based block having at least two terminal nonelastomeric blocks.

Abstract: A coating composition for polyolefinic films, especially poly-propylene films, which consists essentially of a solution of a dry three-component polymeric system comprising:(a) a first component consisting of acrylic homopolymers, copolymers or mixtures thereof;(b) a second component consisting of a polyester resin obtained by condensation; and(c) a third component consisting of medium or low viscosity nitrocellulose or mixtures thereof.The coated products and the coating process are also covered.

Abstract: The present invention relates to a laminate comprising a polymethyl methacrylate layer having adheringly coated on at least one surface thereof a layer of polyvinylidene fluoride having a maximum thickness one-tenth the thickness of the polymethyl methacrylate layer; the total thickness of the polyvinylidene fluoride being no greater than about 400 microns. The invention also comprises the method of making such laminates.

Abstract: There is disclosed a bonded sheet for packaging, having a thickness ranging from 20 to 200 microns, a low transmittance, a low permeability to gases and vapors, a high resistance to perforation, and high anti-static characteristics, said bonded sheet consisting essentially of two films prepared from substantially crystalline polyolefin polymers or mixtures thereof and, optionally, from an interposed adhesive layer, wherein at least one of the two films is a film oriented by the stretching of polypropylene essentially constituted by isotactic macromolecules and having a melt index between 0.5 and 5, and wherein at least one of the two films is coated, on the surface thereof which is in contact with the other film, with a metallized layer (preferably aluminum) having a resistivity between 1 and 5 Ohms. One of the two films may be a film, optionally oriented by stretching, prepared from a polymer selected from the class consisting of a polyethylene having a melt index of from 0.

Abstract: A heat-shrinkable multilayer film suitable for use in the packaging of primal meat cut, includes a first outer layer comprising a blend of a propylene-ethylene copolymer, a (butene-1)-ethylene copolymer, and a thermoplastic elastomer selected from the group consisting of ethylene-propylene copolymers and ethylene-propylene diene terpolymers; a first core layer connected to the first outer layer and being capable of being stretched during the biaxial orientation of the multilayer film and comprising an extrudable adhesive; a second core layer connected to the first core layer and serving as an oxygen barrier to protect the meat cut from spoilage and being compatible to the biaxial orienting and heat shrinking of the film; and a second outer layer comprising an ethylene vinyl acetate copolymer; the multilayer film being biaxially oriented.

Abstract: Disclosed are (1) coated paper comprising a paper substrate having adhered to at least one surface thereof a coating composition comprised of a binder material and an organic pigment, and (2) a paper product comprised of cellulosic fibers and an organic pigment, the organic pigment being essentially uniformly dispersed throughout the paper product. The organic pigments employed are finely divided particles obtained by graft copolymerizing an ethylenically unsaturated monomer, such as styrene, and a water-soluble nonionic or anionic prepolymer in aqueous media and in the presence of a free-radical polymerization initiator.

Abstract: A resin blend for producing a peelable heat seal, which does not produce "angel hair" upon separation, includes polybutylene and a copolymer of ethylene with, for example, vinylacetate or methyl acrylate. Typical substrates are high density polyethylene and nylon.

Abstract: Shaped articles which are resistant to attack by fatty substances and chemicals and which have impact resistance comparable to high impact polystyrene are produced by extrusion or injection molding of a composition consisting essentially of high impact styrene-butadiene graft copolymer or a mixture thereof with no more than about 55% styrene homopolymer and small proportions of polyethylene or polypropylene and of a block copolymer X-Y-X in which each X is a polystyrene block of about 5,000 to 10,000 molecular weight and Y is a hydrogenated polybutadiene block of 25,000 to 50,000 molecular weight. The articles are characterized by having a skin which is substantially enriched in polyolefin.

Abstract: A heat-shrinkable multilayer film suitable for use in the packaging of a frozen poultry, includes a first outer layer comprising a blend of a propylene-ethylene copolymer having a high isotactic molecular structure with less than about 6% by weight ethylene and having a melt flow of from about 1.5 to about 18 decigrams per minute; a (butene-1)-ethylene copolymer having a high isotactic molecular structure with less than about 10% by weight being ethylene and having a melt flow of from about 0.1 to about 5.

Abstract: A stress-relieving material for the surface of an insulated electrical conductor consists essentially of a cold-flowable, low viscosity, corona-resistant elastomer containing from about 350 to about 600 parts by weight per hundred of elastomer of a semiconductor material and up to about 10 parts per hundred of elastomer of processing aids.

Abstract: A thermoplastic olefin resin composition composed of a blend of(i) 5 to 95% by weight, based on the weight of the blend, of a random copolymer consisting essentially of 55 to 85 mole% of propylene and 45 to 15 mole% of 1-butene and having a heat of fusion of 10 to 80 joules/g determined by differential thermal analysis using a differential scanning calorimeter, and(ii) 5 to 95% by weight, based on the weight of the blend, of an isotactic propylene resin containing 0 to 10 mole% of another .alpha.-olefin and having a melting point of 135.degree. to 165.degree. C. and a melt index, measured at 230.degree. C., of 0.1 to 20; and a laminated olefin resin film or sheet thereof.

Abstract: This invention is a self-welding packaging film made by blending at least two ethylene polymers, one of the polymers having a melt flow substantially greater than any of the other polymers in the blend, and thereafter extruding a film from the blend. The film may be self-supporting or it may be an inner layer in a multi-ply film. Preferred ethylene polymers for the blend are the ethylene-vinyl acetate copolymers wherein one copolymer has a melt flow of less than 5.0 and the other has a melt flow greater than 28.0.

Abstract: Laminates of two or more low density polyethylene films are prepared by blocking together superimposed films at a temperature below the fusion temperature, whereby the films can be pealed apart without distortion. The laminates are adapted for the manufacture of heavy duty bags and sacks having increased impact and tear resistance, as compared with single films or fused together laminates having the same gauge.

Abstract: The use of a minor amount by weight of a polycarbodiimide in an active Br or Cl containing polymer serves to lessen the adverse effects caused by formation of Br or Cl decomposition products on aging. In particular, the use of polycarbodiimides in bromo butyl or chloro butyl rubber tire inner liners, especially those also accelerated by polyimino compounds during curing, adjacent hydrocarbon rubber layers (carcass or ply stocks) reinforced with polyester cords serves to reduce the degradations or heat aging of the polyester cord caused by Br and/or Cl and/or amine compounds or fragments which may tend to migrate from the inner liner through the ply stock to the polyester cords.

Abstract: A weather-resistant covering is made of three superimposed sheets of vulcanizable material such as ethylene-propylene copolymers, e.g. ethylene-propylene-diene terpolymer. The inner layer contains a vulcanization accelerator and advantageously the outer layers do not. An additional inner layer such as a non-woven textile fabric can be provided to increase strength and dimensional stability. A roof can be covered by placing a plurality of strips of such covering side-by-side with slight overlap, welding them together into impervious seams by application of a volatile solvent or swelling agent for the outer layers.

Abstract: Vulcanizable semi-conducting compositions that can be used to provide strippable insulation shielding compositions for electrical conductors, and articles of manufacture wherein the crosslinked product of said vulcanizable compositions are directly bonded to a crosslinked polyolefin substrate.

Abstract: A coating which can be easily applied as an aqueous emulsion or dispersion to woven polypropylene and which provides dimensional stability and soft hand, while avoiding excessive tackiness and blocking comprises: about 100 parts by weight of styrene-butadiene rubber (SBR), wherein a styrene to butadiene ratio comprises 100 parts by weight of styrene to between about 66-180 parts by weight of butadiene, to between both about 10-100 parts by weight of wood rosin and about 1-18 parts by weight of an alkylaryl polyether alcohol having the formula: ##STR1## where: x is 12-20 and y is 8-10.

Abstract: Laminar thermoplastic films are provided which exhibit improved heat seal strengths as well as heat seal temperature ranges. The laminates comprise a predominantly propylene-based polymer substrate or core, the propylene core layer being coated with continuous skins, the skins being fabricated from ethylene based resin with a density of less than 0.939.

Abstract: A collapsible dispensing container having a laminated tubular body, the laminated tubular body including a metal foil lamination, a layer of a polyolefin on the outside of the metal foil lamination, and, on the inside of the metal foil lamination and on the outside of the polyolefin layer, a layer of a copolymer resulting from the polymerization of 100 parts by weight of (a) at least 50 percent by weight of at least one nitrile having the structure ##STR1## wherein R is hydrogen, a lower alkyl group having from 1 to 4 carbon atoms, or a halogen, and (b) up to 50 percent by weight based on the combined weight of (a) and (b) of an ester having the structure ##STR2## wherein R.sub.1 is hydrogen, an alkyl group having from 1 to 4 carbon atoms or a halogen, and R.sub.

Abstract: Recording paper for use in, for example, an electrostatic recording system, comprising an electrically conductive base layer, a photoconductive or dielectric recording layer disposed on one surface of the base layer, and a heat-sensitive bonding layer disposed on the other surface of the base layer. The bonding layer is non-tacky at normal temperature, and it develops tackiness when heated after a recording has been made on the recording paper.

Abstract: A two-layer adhesive coating having a dry, non-tacky surface convertible to a permanently adhesive surface by application of heat. A first co-reactant in an adhesive-containing base layer combines with a second co-reactant applied to the base layer to form a dry, non-tacky barrier layer comprising a molecular complex which dissociates upon heating to form a permanently adhesive surface.

Abstract: A precast concrete structural unit is provided including a concrete sub-unit and a plastic resinous sheet. The sheet is adhered to the sub-unit at the time of pouring the concrete utilizing contact adhesive, preferably polychloroprene cement. The structural unit may further include adhesive coated reinforcement.

Abstract: Sheet metal having a partially cured organic thermosetting coating thereon and method of forming drawn and ironed seamless containers therefrom.

Abstract: A color developer sheet sensitized in a color developing property on contact with a chromogenic material and improved in the light-resistance of the developed color, which comprises a support sheet and a coating composition comprising an organic color developer and, as a binder, a latex of a copolymer prepared by polymerization of a mixture essentially consisting of about 20 to 70% by weight of one or more aliphatic conjugated diolefin monomers, about 0.5 to 15% by weight of one or more unsaturated carboxylic acid monomers and about 15 to 79.5% by weight of one or more other olefin monomers copolymerizable with them and having a gel content of about 95 to 100% by weight applied onto a surface of the said support sheet to make a color developer layer.

Abstract: A synthetic-resin laminated structure is fabricated by bonding together in a molten state a layer of a nitrile-containing polymer (I), an interposed layer of a polymer mixture (II) comprising a nitrile-containing polymer (A) and an olefin-containing polymer (B) blended together, and a layer of an olefin-containing polymer (III). The laminated structure may have more than three layers, but the layer of the polymer mixture (II) is always interposed between the layers of the polymers (I) and (III). The laminated structure may be in the form of a sheet, a tube, or a hollow article such as a bottle.

Abstract: A building form and method of preparing molded articles thereon which comprises molding an article on the casting surface of a building form comprising a casting surface adhered to a water destructible support layer, the said casting surface comprising a water permeable polymeric film, water destructing the said support layer, water penetrating the said casting surface, and removing the molded article.

Abstract: A duo bonding layer for adhering a chlorinated polyethylene layer or coating to a rubber-lined article. The first bonding layer contains a blend of material having from 75 to 25 percent of chlorinated polyethylene by weight and from 25 to 75 percent by weight of an elastomer of natural rubber, a rubber homopolymer, or a rubber copolymer. The second bonding layer contains a blend of the same material but with the amount of chlorinated polyethylene by weight ranging from 90 to 55 percent and the amount of the elastomer ranging from 10 to 45 percent by weight. The first bonding layer is generally attached to a rubber layer such as natural rubber, which in turn is bonded directly to an article. The second bonding layer is attached to the chlorinated polyethylene layer.