Abstract: The invention relates to multilayer composites having improved weathering properties without reducing flame retardation properties. The composites have a fluoropolymer layer over a thermoplastic layer. The multilayer composite may be a fluoropolymer layer directly over a relatively flammable substrate or non-flammable substrate (like PVC), or it may be a fluoropolymer layer over a relatively flammable cap layer, over a substrate (that is flammable or non-flammable). The composite is formed using coating, coextrusion and/or lamination techniques. The multilayer composite is especially useful in articles having surfaces that are used in a relatively horizontal position, including decking, railings, roofing and window profiles. The composites provide improved weathering for the substrate without a reduction in flame-resistance, when compared to the substrate without the outer fluoropolymer layer.

Abstract: The invention relates to multilayer composites having improved weathering properties without reducing flame retardation properties. The composites have a fluoropolymer layer over a thermoplastic layer. The multilayer composite may be a fluoropolymer layer directly over a relatively flammable substrate or non-flammable substrate (like PVC), or it may be a fluoropolymer layer over a relatively flammable cap layer, over a substrate (that is flammable or non-flammable). The composite is formed using coating, coextrusion and/or lamination techniques. The multilayer composite is especially useful in articles having surfaces that are used in a relatively horizontal position, including decking, railings, roofing and window profiles. The composites provide improved weathering for the substrate without a reduction in flame-resistance, when compared to the substrate without the outer fluoropolymer layer.

Abstract: A coextrusion feedblock is disclosed having a housing, a central extrusion channel, a coextrusion channel, a rotatable combining plane, a rotatable profile actuator, and a profiled bar mounted removably on the rotatable profile actuator. The central extrusion channel and the coextrusion channel pass through the housing. The rotatable combining plane and the rotatable profile actuator are positioned on opposite sides of the coextrusion channel so as to confront each other.

Abstract: An adjustable feedblock configured for adjusting the thicknesses of each layer of the juxtaposed extrudates forming a laminate. The feedblock includes at least one pair of opposing combining planes and at least one pair of opposing extrudate distribution blocks that are removably disposed within the housing of the feedblock. As such, the combining planes and the extrudate distribution blocks partially define portions of the flow paths for the extrudates that form the laminate within the housing of the feedblock. A method for forming a laminate having juxtaposed layers of extrudates of adjustable thicknesses is also disclosed.

Abstract: A polymer-based multilayer film including a combination of desirable properties, such as relatively high chemical resistance and relatively good gas barrier properties. Specifically, in various embodiments, a multilayer film may include at least one layer having relatively high chemical resistance and at least one other layer having relatively good gas barrier properties. In one particular embodiment, the present disclosure relates to a multilayer film structure having a core layer of a fluoropolymer containing chlorine and a fluoropolymer containing chlorine and oxygen and an outer layer operably bonded on one side of the core layer and comprising a perfluorinated fluoropolymer. The core layer may be a blended layer of the fluoropolymer containing chlorine and the fluoropolymer containing chlorine and oxygen, or the core layer may be a sandwiched structure having at least one layer of the fluoropolymer containing chlorine and at least one layer of the fluoropolymer containing chlorine and oxygen.

Abstract: A multi-layer sheet structure is provided. The multi-layer sheet structure comprises at least one structural layer comprising high impact polystyrene and at least one moisture barrier layer comprising greater than about 30 percent cyclic olefin copolymer by weight of the at least one moisture barrier layer.

Abstract: The present invention relates to films comprising a number of repeating microlayer units. The repeating units include one layer made from a barrier resin derived from one or more monomers having at least one oxygen atom, and one layer comprising a non-polar polyolefin. By ensuring that the micro layers are a micron or less it has been discovered that the microlayers adequately adhere to each other without the need for a tie layer between the polar and non-polar layers.

Abstract: The present invention provides multiple layer interlayers having a soft inner polymer layer and relatively stiff outer layers that can be laminated without unacceptable optical distortion and used in various multiple layer glass panel type applications. Multiple layer interlayers of the present invention have surface topography that is formed by controlling the melt fracture that occurs at the exposed surface of the interlayer, or individual layers of the multiple layer interlayer, during formation of the interlayer. By precisely controlling the surface topography of the interlayer, lamination of the interlayer with a rigid substrate does not lead to unacceptable optical distortion caused by the transfer of the surface topography through outer, stiffer layers into softer, internal layers of the interlayer.

Abstract: The invention relates to a method of producing a film comprising at least one layer of a thermoplastic fluoro-polymer and at least one layer of another polymer (A). The inventive method consists in using extrusion blow molding to coextrude a fluoro-polymer and polymer (A) which adhere to one another; with a layer of another thermoplastic polymer (B) such that it forms a layer which is adjacent to the fluoropolymer/polymer (A) layer According to the invention, the thermoplastic polymer (B) is incompatible with the fluoro-polymer and polymer (A) and has adequate extrudate behavior to support the layers of fluoro-polymer and/or polymer (A). Once the coextrudate has been cooled, by separating the layer(s) of (B), at least the film is recovered, said film comprising at least one layer of a polymer selected from among thermoplastic fluoro-polymers and polymers (A).

Abstract: A multilayer composite which has improved adhesion between the layers, with the following layers: I. an inner layer I selected from among a fluoropolymer molding composition and a polyolefin molding composition; II. a bonding layer II which has the following composition: a) from 2 to 80 parts by weight of a polyamine-polyamide graft copolymer, b) from 0 to 85 parts by weight of a polyester, c) from 0 to 85 parts by weight of a polymer selected from among polyamides, fluoropolymers and polyolefins, where the sum of the parts by weight of a), b) and c) is 100; d) not more than 50 parts by weight of additives; III. a layer III of a polyester molding composition.

Abstract: Microporous membranes having a relatively large average pore size, methods of making microporous membranes having a relatively large average pore size, and methods of using microporous membranes having a relatively large average pore size are disclosed.

Abstract: A hose for use in bio-pharmaceutical applications includes an innermost tubular layer made from a fluoropolymer material. The tubular layer has an inner, relatively smooth and pure surface that defines an opening for transfer of various media. A layer of silicone is disposed next to an outer surface of the innermost tubular layer through use of, for example, an extrusion method. The outer surface of the tubular layer may first be modified by various treatments or chemicals to facilitate the adhesion of the silicone layer thereto. The silicone material may be solid or foamed. A reinforcement layer may be disposed adjacent to an outer surface of the silicone layer. The reinforcement layer may be formed of a wire braid having gaps. An outer jacket of silicone may be attached to the reinforcement layer and to the inner silicone layer through the gaps in the reinforcement layer.

Abstract: Multilayer films are provided which include at least a core layer and a sealant skin layer, and optionally a first tie layer intermediate the core layer and the sealant skin layer. The sealant skin layer includes a first polymer component having a heat of fusion of less than 75 J/g and a second polymer component. The multilayer film preferably has a seal strength greater than about 200 g/2.54 cm for a seal formed on a crimp sealer at a temperature of at least 93.3° C. The core layer may include a nucleating agent and a hydrocarbon resin. The multilayer film may be biaxially oriented and may be useful in packaging applications.

Abstract: The backsheet comprises a coextruded multilayer sheet that comprises: i) an inner layer comprising a polyolefin resin; ii) a core layer comprising a polypropylene resin, a blend of a polypropylene resin and a maleic anhydride grafted polypropylene (MAH-g-PP), or a polypropylene resin/MAH-g-PP multilayer structure; iii) an outer layer comprising a maleic anhydride grafted polyvinylidene fluoride (MAH-g-PVDF), a blend of a polyvinylidene fluoride (PVDF) and a MAH-g-PVDF, or a PVDF/MAH-g-PVDF multilayer structure; iv) a first tie layer between the core layer and the outer layer; and v) an optional second tie layer between the core layer and the inner layer.

Abstract: A multilayer structure comprises at least one barrier layer comprising at least one vinylidene chloride polymer, at least one UV protecting layer, and at least one reflective layer wherein none of these layers also serve as a sealing layer. The multilayer structure is preferably a film, more preferably in the form of a pouch, preferably for packaging flowable product, especially milk. When used as a milk pouch, the structure is more effective at protecting milk from deterioration at ambient temperature and humidity than is a similar multilayer structure having an ethylene vinyl alcohol barrier layer. The multilayer structure preferably has more than one reflective layers and is preferably in the form of a pillow pouch.

Abstract: Porous polymeric membranes including HALAR® (poly(ethylene chlorotrifluoroethylene)) and related compounds and the methods of production thereof which avoid the use of toxic solvents. Preferred solvents, coating agents and pore forming agents are citric acid ethyl ester or glycerol triacetate. The membranes may be in the form of a hollow fiber or flat sheet, and may include other agents to modify the properties of the membranes, such as the hydrophilic/hydrophilic balance. Leachable agents may also be incorporated into the membranes.

Abstract: The invention relates to a biaxially oriented polyester film having a base layer (B) which comprises at least 80% by weight of a polyester comprised of from 55 to 90 mol % of units deriving from at least two aromatic dicarboxylic acids and of from 5 to 45 mol % of units deriving from at least one aliphatic dicarboxylic acid, where the total of the dicarboxylic-acid-derived molar percentages is 100. The film features ultimate tensile strength of ?100 N/mm2 and modulus of elasticity of ?3000 N/mm2.

Abstract: A radiation-curable composite layered sheet or film comprising at least one substrate layer and one outer layer, said outer layer being composed of a radiation-curable composition having a glass transition temperature of more than 40° C.

Abstract: In a method for producing hollow fiber membranes which comprises melt kneading a mixture comprising polyvinylidene fluoride and an organic liquid or a mixture comprising polyvinylidene fluoride, an organic liquid and an inorganic fine powder, extruding the kneaded mixture to form hollow fibers, and extracting the organic liquid or the organic liquid and the inorganic fine powder from the hollow fibers, which includes the steps of drawing the hollow fibers before or after termination of the extraction and then shrinking the fibers. According to this method, it is possible to stably produce hollow fiber membranes having dense pores and having a high water permeation performance, excellent endurance and stain resistance, and which are suitable for filtration uses such as removal of turbidity of water.

Abstract: A colored coating for an article is provided including a first layer polymeric coating material with a transparent base which has been pigmented to a desired color and extruded, a second layer of transparent polymeric coating material which has been co-extruded with the first layer and a third layer of polymeric coating material co-extruded with the first layer opposite the second layer, the third layer being more opaque than the first layer. The invention, while having widespread application, is particularly suitable for use as a coating for an exterior surface of an automotive vehicle body panel.

Abstract: A tray-type package is disclosed which includes a polyester support member, a product contained on the support member, and a lidding film containing the product and sealed to the periphery of the support member, the lidding film including a sealant layer of a polyester copolymer having greater than about 50% by mole of glycol polymerization units. Preferably, the support member is a foamed or nonfoamed polyethylene terephthalate (PET) tray and the lidding film is a multilayer film which includes a glycol-modified PET sealant layer. Also disclosed is a lidding film having a sealant layer of a blend of a glycol-modified PET and at least one further polymeric component.

Abstract: A method for producing an improved coextruded polymeric film is disclosed. First, a base layer containing a polymeric matrix and at least one additional layer on at least one side of the base layer are coextruded. If the coextruded polymeric film is to be opaque, the base layer also contains at least one cavitating agent. Next, the coextruded multi-layer film is cooled. Finally, the coextruded multi-layer film is oriented in at least the machine direction (MD). At least the base layer of the coextruded polymeric film contains a fluoropolymer. The inclusion of the fluoropolymer in at least the base layer of the coextruded polymeric film provides a more even distribution of polymer flow through a die, which in turns leads to improved film gauge uniformity.

Abstract: A tray-type package is disclosed which includes a polyester support member, a product contained on the support member, and a lidding film containing the product and sealed to the periphery of the support member, the lidding film including a sealant layer of a polyester copolymer having greater than about 50% by mole of glycol polymerization units. Preferably, the support member is a foamed or nonfoamed polyethylene terephthalate (PET) tray and the lidding film is a multilayer film which includes a glycol-modified PET sealant layer. Also disclosed is a lidding film having a sealant layer of a blend of a glycol-modified PET and at least one further polymeric component.

Abstract: A heat shrinkable film suitable for use in cook-in applications is provided which exhibits a transverse direction free shrink at 50° C. of less than about 2% and a transverse direction free shrink at 57° C. of at least about 3%. The food contact layer includes a polymer having a surface energy of at least about 0.034 J/m2 and a second layer includes at least one member selected from the group consisting of polyester, polyvinylidene chloride, polyamide and polyalkylene carbonate. Preferably, the desired shrink properties are attained by annealing the film under controlled conditions.

Abstract: A colored coating for an article is provided including a first layer polymeric coating material with a transparent base which has been pigmented to a desired color and extruded, a second layer of transparent polymeric coating material which has been co-extruded with the first layer and a third layer of polymeric coating material co-extruded with the first layer opposite the second layer, the third layer being more opaque than the first layer. The invention, while having widespread application, is particularly suitable for use as a coating for an exterior surface of an automotive vehicle body panel.

Abstract: The present invention is a system and process for drying and extruding a cellulosic compound. The compound materials are provided to a mixer in a desired ratio. The compound materials are then mixed together. Thereafter, the compound materials can be stored in a non-controlled environment until needed. When it is time to extrude the compound materials, the compound materials are transferred to a dryer at a location remote from the mixer. The dryer has a surface area enabling the compound materials to be sufficiently spread out for drying. The compound materials are substantially uniformly dried to a desired level in the dryer. The compound materials are then transferred to an extruder to be formed into a final net shape.

Abstract: A tubular, multilayer film comprises a central barrier layer and a pair of adhesive layers on opposite sides of the central barrier layer. The adhesive layers completely cover the central barrier layer. Opposing edges of the central barrier layer overlap longitudinally along the tubular, multilayer film. The total thickness of the central barrier layers in the overlapping portion is substantially the same as the thickness of the central barrier layer in the non-overlapping portion. The tubular, multilayer film also includes inner and outer surface layers. The inner surface layer extends completely around the interior of the tubular, multilayer film, and the outer surface layer extends completely around the exterior of the tubular, multilayer film.

Abstract: The present invention is directed to a biaxially oriented multi-layer film which comprises: (a) a core layer comprising a syndiotactic propylene homopolymer; and (b) at least one additional layer adjacent to the core layer comprising a polymer which is an ethylene or a propylene homopolymer, ethylene copolymer or terpolymer containing comonomers of propylene and/or butene-1. Optionally, there can be a skin layer applied to the exposed surface of the outer layer. The skin layer and/or the at least one additional layer is a polyolefin selected from the group consisting of isotactic polypropylene, polyethylene, ethylene-propylene random copolymer, ethylene-propylene block copolymer or ethylene-propylene-butene-1 terpolymer.

Abstract: The present invention provides highly oriented multilayer films. They are produced by coextruding or laminating films having at least one layer of a fluoropolymer, at least one layer of a polyolefin homopolymer or copolymer and an intermediate adhesive layer of a polyolefin having at least one functional moiety of an unsaturated carboxylic acid or anhydride thereof. With this structure the polyolefin layer allows the fluoropolymer layer to be stretched up to ten times its original length. Such a high orientation ratio for the fluoropolymer film increases the mechanical strength, toughness, and water vapor barrier properties of the film while using a thinner gauge fluoropolymer film. Coextrusion processing can be done at higher temperatures, i.e. in the range of from at about 280° C. to about 400° C. These temperatures allow films to be produced in the absence of polymer degradation and film melt fracture.

Abstract: A method of producing highly oriented multilayer films comprising laminating films having at least one layer of a fluoropolymer, at least one layer of a polyolefin homopolymer or copolymer and an intermediate adhesive layer of a polyolefin having at least one functional moiety of an unsaturated carboxylic acid or anhydride thereof. With this structure the polyolefin layer allows the fluoropolymer layer to be stretched up to ten times its original length. Such a high orientation ratio for the fluoropolymer film increases the mechanical strength, toughness, and water vapor barrier properties of the film while using a thinner gauge fluoropolymer film.

Abstract: A process for producing a fluoroplastic drawn molded article is disclosed in which a fluoroplastic molded article is brought into contact with a heating medium set at a temperature exceeding the static melting point of the molded article and drawn at a temperature at which the molded article does not substantially melt. The fluoroplastic drawn molded article produced in accordance with the present invention is significantlly improved in physical properties such as tensile strength and tensile modulus.

Abstract: A process of making a biaxially-oriented multilayer film, comprises extruding a tubular multilayer tape and inflating the tape so that the tape is biaxially oriented by stretching in the transverse direction and machine direction at the same time, so that a tubular multilayer film is formed.