Abstract: The present invention is directed to a cling packaging film for use in wrapping food products, particularly fresh meat and produce. The film comprises a core layer containing a copolymer of ethylene and an ethylenically unsaturated polar comonomer together with an elastomeric polymer. The film further comprises a skin layer containing linear low density polyethylene. Both the core and skin layers may contain additional components. A film in accord with the present invention compares favorably with PVC food wrap film and is intended to provide a replacement therefor.

Abstract: A compatibilized polymer alloy has been developed which has excellent processability under thermoforming conditions and the molded articles produced from the alloy exhibit superior gloss, shrinkage, surface hardness, polarity, strength and high heat distortion. The alloy is, in general, comprised of a polyolefin composition, a polystyrene copolymer, or polymer blend, and a compatibilizing agent. This polymer composition or alloy is particularly useful in producing packaging materials and food containers.

Abstract: Products formed from crosslinked vinyl resins and a plasticizer exhibit a low degree of marring after contacting polymeric substrates or substrates coated with a polymeric layer.

Abstract: This invention relates to a composite molded article where a polymer film of superior weather resistance, adhesion and surface smoothness is made into an integral composite body on the surface of polynorbornene base material by utilizing reaction injection molding in combination with an in-mold coating process. By means of this invention, it is possible to manufacture three dimensional composite molded articles, composite molded articles of complex shapes and deep-drawn composite molded articles. The composite molded articles of this invention can be used for a variety of purposes, such as automobile parts, electrical parts, construction, etc.

Abstract: Provided are multilayered structures comprising at least 2 layers of a layer which comprises a resin composition comprising:(A) a thermoplastic resin,(B) a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 20 to 65 mol % and a saponification degree of vinyl acetate component of at least 96%, and(C) a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 68 to 98 mol % and a saponification degree of vinyl acetate component of at least 20%, anda layer which comprises a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 20 to 65 mol % and a saponification degree of vinyl acetate component of at least 96%.These multilayered structures have excellent gas barrier properties and resistance to intralayer delamination, and the resin composition layer thereof has neat appearance.

Abstract: A rubber-metal adhesive system which contains a primer component and an overcoat component. The primer component includes a polychloroprene compound, a phenolic resin, and a metal oxide while the overcoat component preferably contains a nitroso compound, a halogenated polyolefin, and a metal oxide or salt. When applied between a metal surface and a rubber substrate under heat and pressure, the adhesive system provides a flexible rubber-metal bond which will withstand high temperature fluid environments.

Abstract: Packaging sheet materials 10 and packages having improved impact/shock tolerance as measured in a slope drop test. The sheet materials comprise an impact layer 12 of a blend of polypropylene and a polymer providing elastomeric properties between a sealant substructure 14 and a substrate substructure 16.

Abstract: A product is disclosed which comprises a ring-opened base polymer of at least one norbornene-type monomer and a thin polymer film on at least a portion of said base polymer of a vinylidene chloride polymer or an unsaturated nitrile polymer whereby the product has improved weatherability and reduced odor. The method of making the product is characterized by applying the polymer film from an organic solution of a vinylidene chloride resin or an unsaturated nitrile resin and then drying the coating to remove the organic solvent.

Abstract: A machinable flexible packaging material capable of forming a seal that is reclosable at ambient temperature is made by applying a tacky adhesive and a thin skin layer onto a substrate, such as polyester film. Being thin, the skin layer fractures when the seal is opened, thereby allowing the adhesive to form a resealable interface at the seal area. However, since the adhesive is encapsulated in the material initially, the material may be used like other packaging materials in form, fill and seal machines.

Abstract: An enhancement of the cling property of stretch wrap is obtained by adding a linear styrenic elastomer having a melt index between about 5 and about 10 g/10 mins to the cling layer of a film in addition to the usually added tackifiers. The invention enhanced cling layer films can be produced as A/B, A/B/A OR A/B/C films.

Abstract: Multilayered barrier film products providing gas and moisture barrier properties. The film products comprise at least a first polymer film having low permeability to moisture and a heterogeneous polymer blend film containing a gas barrier polymer and a second polymer distributed in the gas barrier polymer, so as to allow the heterogeneous polymer blend film to adhere to the first polymer film. A method for the preparation of multilayered barrier film products includes the steps of forming a gas barrier polymer film from a heterogeneous polymer blend containing a gas barrier polymer and a second polymer and, bonding a moisture barrier polymer film to at least one side of the gas barrier polymer film. The method can be practiced utilizing conventional coextrusion equipment.

Abstract: This invention relates to a composite of a thermoplastic resin (other than a polyolefin) and a polyolefin adhered together by a tie-layer system comprised of at least two co-reactive, functionalized polymers either in laminate contact or as a blend.

Abstract: Hot-melt adhesives based upon a mixture composed of poly(vinylmethylether), greater than about 10 weight percent of a thermoplastic resin and, optionally a tackifier resin and/or extender, are found to be superior for the binding of polyolefins such as polyethylene, polypropylene, and ethylene-propylene copolymers to themselves and to other substrates. In particular, the hot-melt adhesives are useful for bonding polyethylene-backed and latex-backed carpet to polyethylene, polypropylene, or ethylene-propylene copolymer.

Abstract: Laminated material sheets for packaging photographic materials, which comprise (a) a middle layer of a thermoplastic resin layer which contains any harmful substances adversely affecting photographic materials, (b) an outer layer having a higher gas-permeability and is photographically inactive comprising a thermoplastic resin and/or a porous flexible sheet layer and (c) an inner layer which is less gas-permeable than said outer layer (b) and is photographically inactive comprising a thermoplastic resin layer, a flexible sheet layer or a laminated layer thereof. Formed articles like containers for like use comprised of said laminated materials. Any harmful substances contained in the thermoplastic resin of the middle layer (a) may diffuse out through the outer layer (b), or they do not almost migrate into the packaged photographic materials through the inner layer (c).

Abstract: Permanently flexible and non-tacky coating mastic and caulking compositions contain one or more polymers having a T.sub.g of about -50.degree. C. to about -10.degree. C. and pendant functional groups attached to the polymer backbone of the formula: ##STR1## in which R.sub.1 is a divalent organic radical at least 3 atoms in length, and X is organoacyl or cyano. The mastics and caulks typically have total non-volatile matter concentrations of about 60 to about 90 weight percent of which about 15 to about 75 weight percent comprises the described polymers and about 25 to about 85 weight percent is non-volatile solid matter other than the polymer such as pigments, fillers, etc.

Abstract: Rubber and vinyl articles such as gloves with improved slip coatings and processes for their production are provided by coating the outer and/or inner surfaces with either (1) a copolymer of at least one copolymerizable vinyl halide, at least one copolymerizable ethylenically unsaturated hydrocarbon and at least one copolymerizable ethylenically unsaturated monomer containing a carboxyl or amido group, (ii) copolymer of at least one copolymerizable vinyl or vinylidene halide, acrylonitrile and at least one acryulic monomer, or mixtures of (i) and (ii).

Abstract: Opaque laminated and stretched products having a total light transmittance of 50% or less are obtained by laminating at least one side of a layer obtained from a composition in which a crystalline polypropylene is blended with a cyclopentadiene type petroleum resin having a softening point of 160.degree. C. or higher, as measured by the ring-and-ball method, in an amount of 3 to 30% by weight based on the total weight of both, with a layer obtained from a crystalline propylene copolymer having a crystalline melting point lower than that of said crystalline polypropylene by 10.degree. C. or more, and, then, stretching the resulting laminate at a temperature lower than the crystalline melting point of the crystalline polypropylene and the softening point of the cyclopentadiene type petroleum resin and at a stretching ratio of 2 or higher in at least a uniaxial direction.

Abstract: A thermoplastic film is provided which is especially suited for use in stretch/cling applications such as, for example, the bundling, packaging and unitizing of foods and other goods. The film comprises a cling layer comprising a polymer of at least ethylene and acrylate, preferably without a tackifying additive. The film further compriss a slip layer comprising a polyolefin preferably including an anticling (slip and/or antiblock) additive. Preferred polyolefins include linear low density polyethylene and polypropylene.

Abstract: A thermoplastic film is provided which is especially suited for use in stretch/cling applications such as, for example, the bundling, packaging and unitizing of foods and other goods. The film comprises a cling layer comprising a polymer of at least ethylene and acrylate, preferably without a tackifying additive. The film further comprises a slip layer comprising a polyolefin preferably including an anticling (slip and/or antiblock) additive. Preferred polyolefins include linear low density polyethylene and polypropylene.

Abstract: The present invention is directed to a hydrophilic transparent plastic slide for a microscope and a method for preparing the same. This slide is characterized in that at least one surface of the slide is rendered hydrophilic so that a staining solution which is generally used in microscopic examination may not be repelled thereon. Further, according to the present invention, the plastic slides can be manufactured by providing at least one surface of each slide with a hydrophilic layer of silicon oxide, a polysaccharide or the like.

Abstract: Disclosed is a material and a process for mkaing that material as well as containers made from the material, which material comprises a clear multilayer sheet of an olefinic polymer or copolymer, and SEBS rubber tie-layer, and a monovinyl aromatic polymer.

Abstract: A polymer laminate produced by crosshead extrusion suitable for wear resistant applications such as a vehile glass run channel comprises a layer of a weather resistant rubber such as an ethylene-propylenediene (EPDM) rubber and a layer of a wear resistant thermoplastic such as polypropylene. The laminate is passed through an oven at an elevated temperature sufficient to cure the EPDM rubber, for example, at about 375.degree. F., with ambient temperature cooling fluid being blown over the exposed surface of the polypropylene thermoplastic. The interior polypropylene surface or interface is heated by the EPDM rubber which is at a high temperature as a result of the heat of extrusion and heat generated by cure thereof. As a result, the polypropylene interior surface or interface melts and causes it to flow and form a mechanical bond with the EPDM rubber while the exposed surface as well as a substantial portion of the polypropylene is kept from melting by the cooling fluid.

Abstract: Multiple layer films, and novel polymer compositions, for use in packaging sterile medical products and shelf stable foods. The films include at least two layers of modified polypropylene-based compositions, and optionally a third layer of polypropylene-based composition. The two layers of the film comprise polypropylene polymers having melting point temperatures, differing by at least 3.degree. C., with corresponding ethylene contents disparate by at least 1 weight percent ethylene. In 2-layer films, the compositions include ethylene butene-1 copolymer in both layers, and optionally an elastomer in either or both layers. Three and four layer films are set forth wherein outer polypropylene based layers protect the inner layers, as of the two layer composition, from bonding to corresponding portions of adjacent like layers. The films can be fabricated into packages formed as by heat sealing.

Abstract: The lubricious hydrophilic coatings of the invention include a hydrophilic polyolefin such as polyvinyl-pyrrolidone and a water-insoluble stabilizing polymer such as a cellulose ester. The coatings may also include an adherent polymer and a plasticizing agent. The coatings are significantly more lubricious when wet than when dry, are adherent to a variety of substrates, and are resistant to removal by wet abrasion. The coating method of the invention involves preparing a solution of the stabilizing polymer and a solution of the hydrophilic polyolefin, and coating the substrate first in one then the other. Alternatively, both the insolubilizing and hydrophilic polymers may be dissolved in a single solvent system and applied to the substrate in a single step. The solutions of the invention are stable, non-reactive, and non-hazardous. The coatings of the invention may be applied to biomedical devices and implants such as catheters, condoms, and nasogastric and endotracheal tubes.

Abstract: A laminate, a method for making the laminate and articles formed from the laminate are disclosed. The laminate comprises an outer layer, an optional adhesive layer, an inner layer, an intermediate regrind layer formed of a blend of the materials from which the other layers are formed, and, interposed between the outer layer and the intermediate regrind layer, there is a buffer layer which is formed from a blend of the materials from which the outer layer and the intermediate regrind layer are formed and which comprises at least about 5% of the material of the intermediate regrind layer. The outer layer is preferably polypropylene and the inner layer is preferably an ethylene vinyl alcohol copolymer.

Abstract: This invention is directed to polyethylene bags or film. More particularly, this invention is directed to a sealable transparent film structure for hot-fill having one or more layers, at least one layer comprising a blend of(a) from about 20 to 50 parts by weight of a terpolymer of ethylene, propylene, and butene or hexene, or from about 20 to 50 parts by weight of a propylene modified rubber and 3% maleic anhydride,(b) from about 20 to 75 parts by weight of polypropylene, and(c) from about 20 to 75 parts by weight of Hmw-HDPE resin.

Abstract: A metallizable, sealable, biaxially stretch-oriented multi-ply film comprises a base layer essentially of polypropylene, a first polyolefinic facing layer and a second polyolefinic facing layer. All of the layers contain a neutralizing agent and a stabilizer against thermal degradation. The neutralizing agent is a calcium carbonate having an absolute particle size of less than 10.0 .mu.m, a mean particle size of less than 0.1 .mu.m, a specific surface area of more than 40 m.sup.2 /g and a whiteness of more than 90% and, the stabilizer comprises a phenolic stabilizer having a molecular weight of more than 1,000 g/mol. One polyolefinic facing layer contains an anti-blocking agent. In addition, a process for producing the metallizable multi-ply film is described, and its use as a packaging material is indicated.

Abstract: A resilient pad for keyboards, such as computer keyboards, is disclosed. The pad is composed of EPDM blended with a copolymer of propylene oxide and allyl glycidyl ether. Each of the polymers is present in the amount of 10-90 parts. An accelerator system for the polymer blend is also disclosed. The pad has substantially improved resilience as measured by the hysteresis of the pad.

Abstract: Free flowing coated pellets are prepared by blending a first polymer with a second polymer wherein the second polymer is a polymer which has a crystalline or semicrystalline melting point which is at least 10.degree. C. above the melting or softening point of the polymer, the two polymers being insoluble in one another in the melt state; (2) intimately blending the two polymers; and (3) extruding the blend through a die having an outlet die face which is maintained at a substantially lower temperature than the extruder melt temperature.In its preferred embodiment the first polymer is an elastomer and the second polymer comprises at least one crystalline or semicrystalline plastic polymer. A typical composition comprises an EPM or EPDM rubber and a mixture of polyethylene and a crystalline copolymer of ethylene and propylene.

Abstract: A multilayer film is provided in the form of an extruded sheet for food wrapping and cooking procedures. The film is made up of alternating layers of a first generally ductile material and a second generally brittle material. Upon wrapping a food item or container, the film exhibits dead fold and/or twistability characteristics. In one embodiment, the materials of the film are chosen to have softening points above about 450 degrees F. so that the film can be used in conventional ovens.

Abstract: A laminated material is prepared in which a resin composition layer (A) containing a thermoplastic resin and an inorganic filler in a scaly or non-scaly form in an amount from 20% to 80% by weight of the total weight of the thermoplastic resin and the filler interposes a resin composition layer (B) containing a thermoplastic resin and an inorganic filler in an amount from 30% to 70% by weight of the weight of the inorganic filler contained in the resin composition layer (A), the filler being in a scally form when the filler in the layer (A) is in a scaly form or being in a non-scaly form when the filler in the layer (A) is in a non-scaly form with a thermoplastic resin layer.

Abstract: Laminated material sheets for packaging photographic materials, which comprise (a) a middle layer of a thermoplastic resin layer which contains any harmful substances adversely affecting photographic materials, (b) and outer layer having a higher gas-permeability and is photographically inactive comprising a thermoplastic resin and/or a porous flexible sheet layer and (c) an inner layer which is less gas-permeable than said outer layer (b) and is photographically inactive comprising a thermoplastic resin layer, a flexible sheet layer or a laminated layer thereof. Formed articles like containers for like use comprised of said laminated materials. Any harmful substances contained in the thermoplastic resin of the middle layer (a) may diffuse out through the outer layer (b), or they do not almost migrate into the packaged photographic materials through the inner layer (c).

Abstract: Hot melt adhesive compositions suitable for disposable constructions are prepared from tackifying resins, oil diluent and a substantially radial styrene-butadiene block copolymer, the copolymer having a styrene content greater than about 35% by weight, a molulus at 300% elongation of at least 4.5 MPa and a solution viscosity less than about 1000 cps.

Abstract: A case or cover for a hard bound book is formed by bonding the formed by bonding the cover boards to the book cover stock using a hot melt pressure sensitive adhesive composition comprising:(a) 10 to 40% by weight of a substantially radial styrene-butadiene block copolymer, the copolymer having a styrene content greater than about 35% by weight, a modulus at 300% elongation of at least 4.5 MPa and a solution viscosity less than about 1000 cps;(b) 20 to 65% by weight of a compatible tackifying resin;(c) 0.1 to 4% by weight stabilizer; and(d) the remainder (to 100%) comprising a plasticizing oil.

Abstract: A coextruded multiple layer film is oriented in primarily the longitudinal direction, and comprises a core layer comprising butadiene styrene copolymer or copolyester, outer layers comprising ethylene propylene copolymer, polypropylene, or blends thereof, and intermediate layers which bond the outer layers to the core layer and comprise an ethylene copolymer.

Abstract: This heat-superstabilized semi-finished product containing thermoplastic resin is constituted of at least two layers: at least one surface layer S designed to be exposed to a source of heat and at least one other layer C which is not directly exposed to said source of heat, said layer S having an overall content by weight of stabilizer which is between 3 and 30 times greater than that of layer C, and said layer S having a surface density between 50 and 600 g.m..sup.-2.

Abstract: The present invention relates to a tension wound roll of tape. The tape does not contain a separate adhesive layer but will bond to itself after being elongated by at least 50 percent and wrapped in overlapping layers. The tape of the invention will not self fuse when in roll form. The present tape is prepared from a minor proportion of a thermoplastic polymer and a major proportion of elastomeric polymer, and further contains a minor amount of an anti-blocking agent. The tape may be used in a wide variety of applications, for example, to repair leaks in hoses or pipes.

Abstract: The invention describes a weatherable, plasticizer-free, uncrosslinked, and deep-drawable sheet, especially for the internal outfitting and external outfitting of automotive vehicles, as well as a process for its production, containing 65-25% by weight of a partially crystalline ethylene-propylene-diene terpolymer and 35-75% by weight of a homo- and/or copolymer of propylene, 0-10% by weight of fillers, as well as stabilizers and lubricants, the extruded or calendered sheet exhibiting a tensile strength at break in the longitudinal direction of at least 20 N/mm.sup.2. An advantageous further development of the invention comprises a composite sheet of EPDM/PP sheet with a crosslinked polyolefin foam layer.

Abstract: A polymer laminate produced by crosshead extrusion suitable for wear resistant applications such as a vehicle glass run channel comprises a layer of a weather resistant rubber such as an ethylene-propylenediene (EPDM) rubber and a layer of a wear resistant thermoplastic such as polypropylene. The laminate is passed through an oven at an elevated temperature sufficient to cure the EPDM rubber, for example, at about 375.degree. F., with ambient temperature cooling fluid being blown over the exposed surface of the polypropylene thermoplastic. The interior polypropylene surface or interface is heated by the EPDM rubber which is at a high temperature as a result of the heat of extrusion and heat generated by cure thereof. As a result, the polypropylene interior surface or interface melts and causes it to flow and form a mechanical bond with the EPDM rubber while the exposed surface as well as a substantial portion of the polypropylene is kept from melting by the cooling fluid.

Abstract: A multi-layer highly moisture and gas permeable packaging film comprising a core layer of a butadiene-styrene copolymer with a styrene content of 60 to 80% by weight and at least two outer layers having heat sealable and gas permeability properties.

Abstract: Disclosed is a fiber-reinforced polymer molded body which comprises a matrix of a polymer having a processing temperature lower than 220.degree. C. and at least one reinforcing layer of a molecularly oriented and silane-crosslinked ultra-high-molecular-weight polyethylene fiber, which is laminated with or embedded in the matrix, wherein the reinforcing layer substantially retains the orientation crystal structure of the ultra-high-molecular-weight polyethylene fiber.

Abstract: Waterproofing sheets or membranes comprising a support constituted by or comprising a vulcanized polyolefinic rubber enclosed in a structure of sandwich type between two layers of bituminous composition selected from:(1) compositions comprising, by weight(A) 60-90% of bitumen(B) 3.5-20% of EPM or EPDM rubber(C) 3-20% of HD polyethylene(D) 1.5-10% EVA copolymer(E) 0-10% of isotactic polypropylene(F) 0-20% of inorganic filler(2) compositions comprising, by weight(A) 60-90% of bitumen(B) 40-10% of styrene-butadiene elastomeric copolymer(C) 0-20% of amorphous polypropylene(D) 0-20% of inorganic filler.

Abstract: A multiple-layer polyolefin film comprises a primary layer of an adhesive resin, such as an ethylene-vinyl acetate copolymer, and two secondary layers of an oriented propylene polymer, the thickness of the primary layer being less than 10% of the total film thickness.

Abstract: A multilayer film comprises a elastomeric core layer and at least one thermoplastic skin layer having a microundulating surface configuration providing the film with a low gloss.

Abstract: A packaging material which comprises a simultaneously coextruded film comprising a conductive ethylene-ethyl acrylate copolymer resin layer containing more than 50 wt.% of ethylene-ethyl acrylate copolymer resin of which content of ethyl acrylate is more than 6 wt.%, 7 to 20 wt.% of carbon black and 0.01 to 1 wt.% of a lubricant, and a polyolefin resin layer.The packaging material of the invention is superior in antistatic property, moistureproofness, light-shielding, tear strength, impact puncture strength, slipping character and heat sealing properties. Its production is easy because of superior moldability, and generations of blocking, fish eye and pin hole are rare. The packaging material of the invention can be made thinner than the conventional packaging material, and expensive metal foil is not necessary. Accordingly, this packaging material is inexpensive.

Abstract: A multilayer composite which comprises a layer of an ethylene vinylalcohol polymer tied to a thermoplastic polymer with a hydrogenated alkadiene vinyl aromatic block copolymer which is graft modified with an unsaturated acid anhydride or unsaturated dicarboxylic acid thereof.

Abstract: An article having a surface comprising an olefin polymer is marked with indicia using an ink comprising a binder capable of substantially complete cure at a temperature of about 100.degree. to 300.degree. C. for less than about 10 minutes and then heated to cure the binder. The indicia are permanent, e.g. are resistant to being rubbed off and are solvent resistant. Heat-recoverable marker sleeves having such permanent indicia are particularly useful for marking wires, e.g. in aircraft harnessing.

Abstract: An aqueous conductivising composition for conductivising paper or other sheet material, for example for producing a conductive base for use in dielectric paper or other electrostatic imaging material, is produced by (a) removing sodium magnesium trifluoride impurity (neighborite) from a synthetic hectorite clay conductivising agent, and (b) adding a binder. These measures reduce dust formation experienced in production or use of electrostatic imaging material incorporating a base which has been conductivised with a synthetic hectorite clay conductivising agent.

Abstract: A transparency comprised of a supporting substrate and thereover a blend comprised of poly(ethylene oxide), and carboxy methyl cellulose together with a component selected from the group consisting of (1) hydroxypropyl cellulose; (2) vinylmethyl ether/maleic acid copolymer; (3) carboxymethyl hydroxyethyl cellulose; (4) hydroxyethyl celluose; (5) acrylamide/acrylic acid copolymer; (6) cellulose sulfate; (7) poly(2-acrylamido-2-methyl propane sulfonic acid); (8) poly(vinyl alcohol); (9) poly(vinyl pyrrolidone); and (10) hydroxypropyl methyl cellulose. In addition, papers with the aforementioned coatings are disclosed herein.

Abstract: A heat shrinkable cylindrical laminated film having a polyvinylidene chloride type resin (I) as an oxygen gas barrier core layer, on the both surface side of which 1 or 2 resin layers are arranged respectively and consisting of 3-5 layers with total, characterized in that the cylindrical exterior surface resin layer on said layer (I) comprises a crosslinked polyolefin type resin layer (II) having a gel fraction [x] at the outermost layer of 25-70% by weight, a geld fraction [y] at the surface layer in the side of the layer (I) of 40% by weight or less and a gradient of gel fraction represented by [y/x] of 0.6 or less and the joint of said layers (I) and (II) comprises a laminate of a joint in a state denaturated by electron rays.