Abstract: A laminate having improved resistance to separation failure when incorporated into a flexible circuit structure. The laminate comprising a highly bondable polyimide and is preferably formed from a polyamic acid comprising a tetracarboxylic acid component, a diamine component, and 0.1 to 5.0 mole % of a dicarboxylic acid component, with respect to the tetracarboxylic acid component, and wherein the adhesive strength of the laminate is greater than 10 N/cm, and more preferably greater than 19 N/cm.

Abstract: Biaxially oriented polyester films which have a polyester-containing base layer (B) and a matt overlayer (A), and are characterized by the following features: a) the transverse shrinkage of the film is between 1 and 2.3%, b) the transverse linear expansion of the film during thermo-mechanical analysis is smaller than or equal to 0.2%, c) the matt overlayer comprises particles, preferably SiO2, whose median diameter is from 2 to 10 ?m and whose SPAN98 is smaller than or equal to 2, and d) the matt overlayer (A) comprises a polyester which has from 4 to 30 mol % of isophthalic acid units are notable in particular for low opacity, high transparency and low gloss of the overlayer (A), and are therefore suitable as flexible packaging films and for the purposes of hot lamination.

Abstract: The present invention relates to a film structure and a method of manufacturing the same. More specifically, the film structure may include a barrier material made from EVOH, nylon or other thermally sensitive barrier material encapsulated by a first adhesive material. The barrier material and the first adhesive material form a barrier layer and a first set of adhesive layers when coextruded. The barrier layer and the first set of adhesive layers may be coextruded at the same or a similar temperature to form a first extrudate. The extrudate may be encapsulated by or otherwise coextruded with a second adhesive material to form a second extrudate at a higher temperature than the first extrudate that then may be formed into a flat sheet via a die. The first set of adhesive layers protects the barrier layer from high temperatures and long residence times related to the coextrusion/lamination process that may degrade the barrier layer.

Abstract: A polymeric film comprising a first layer which comprises (a) a mixture comprising 50-99.9% by weight polyethylene terephthalate (PET) and 0.1-50% by weight of polyethylene naphthalate (PEN) or (b) a copolymer comprising 50-99.9% by weight ethylene terephthalate units and 0.1-50% by weight ethylene naphthalate units, based on the total weight of the first layer, further comprising a second layer comprising PEN and a third layer comprising PEN, and further comprising a first intermediate layer and a second intermediate layer, wherein each of said intermediate layers comprises (a) a mixture comprising 50-99.9% by weight polyethylene terephthalate (PET) and 0.1-50% by weight polyethylene naphthalate (PEN) or (b) a copolymer comprising 50-99.9% by weight ethylene terephthalate units and 0.

Abstract: The present invention relates to oriented or hot-blown shrink films which may be manufactured from by a number of processes. The oriented films may be manufactured by double bubble, LISIM, tape bubble, trapped bubble or tenter framing processes. The films of the present invention are useful as a shrink film to package and label a variety of products. The films exhibit a high degree of MD shrinkage in a very controlled and consistent manner while providing a number of other positive characteristics such as optical clarity, puncture and abrasion resistance, controlled gauge, and superior web winding and handling characteristics. The shrink control layers of the films of the present invention contain a modifier component selected from plastomers and/or metallocene catalyzed ethylene-propylene copolymers and blends thereof.

Abstract: Biaxially-drawn polyester film for fabrication which is characterized in that it is a film comprising polyester in which ethylene terephthalate units and/or ethylene naphthalate units are the chief structural component, and the melting point of said film is 180-270° C., the angle of contact to water is 70°-120°, and the planar orientation coefficient is 0.08-0.15. This film shows outstanding release properties following repeated use, use after fabrication and use in an aqueous environment and, furthermore, it exhibits stable properties with little variation and, in particular, following lamination to metal sheet such as steel or aluminium, when used as the inner face of a fabricated metal can, it is outstanding in its non-stick properties to the contents, and provides a combination of heat resistance and processability.

Abstract: Provided is a polypropylene-based multilayer wrap film comprising (A) a surface layer containing a first composition comprising 50 to 80 wt. % of (S1) a crystalline polypropylene-based resin and 20 to 50 wt. % of (S2) at least one softener selected from amorphous or low-crystalline propylene-?-olefin copolymers and butene-1 polymers, and based on 100 parts by weight of the first composition, 5 to 15 parts by weight of (S3) a hydrogenated terpene resin and 10 to 20 parts by weight of (S4) an aliphatic hydrocarbon which is liquid at normal temperature, and (B) a core layer which is adjacent to the surface layer and contains 80 to 98 wt. % of (C1) a crystalline polypropylene-based resin and 2 to 20 wt. % of (C2) an aliphatic hydrocarbon which is liquid at normal temperature.

Abstract: The biaxially oriented polyester film of the present invention useful for twist wrapping is prepared by biaxially drawing a polyester sheet which has a glass transition temperature (Tg) of at least 60° C., in the longitudinal and transverse directions, wherein the biaxially oriented film has a specific gravity of 1.38 or less.

Abstract: The invention relates to a white, biaxially-oriented and coextruded polyester film which is matt on at least one side with at least one base layer B, which contains a cycloolefin copolymer (COC) in amounts of 4 to 60 wt. %, based on the weight of the base layer, in addition to polyester starting material. The glass transition temperature Tg of the COC lies in the range from 70 to 270° C. Said film has at least one matt outer layer (A), made from polyester and is particularly suitable for use in fast running machines such as winding, metallising, printing or laminating machines.

Abstract: Methods for using biaxially stretched polyester as a photo-receptive layer for dye sublimation printing are disclosed. Two-sided sublimation printing on polyester is achieved.

Abstract: The present invention disclose a method for the orientation of a high density polyethylene (“HDPE”) film. The process of the invention comprises forming a HDPE-wax mixture by adding to a HDPE batch a normally solid hydrocarbon wax. The HDPE-wax mixture is subsequently stretched into a film at an orientation temperature below the film's melt temperature. The hydrocarbon wax is characterized by having a drop point equal to or lower than the melting point of the HDPE film. The present invention also provides a film made by the process of the invention and a master batch thereof.

Abstract: The present invention relates to a high-whiteness, biaxially oriented polyester film with at least a base layer made from polyester. The base layer of the polyester film of the invention also comprises from 2 to 60% by weight of a cycloolefin copolymer (COC), from 0.1 to 25% by weight of a white pigment, and, if desired, from 0 to 5% by weight of an optical brightener, based on the weight of the base layer. The glass transition temperature of the COC here is to be within the range from 70 to 270° C. The film is particularly suitable for packing foods or other consumable items which are sensitive to light and/or to air, or for use in industry, e.g. for producing hot-stamping foils or as a label film, or for image-recording papers, printed sheets, or magnetic recording cards, or for processing on high-speed machinery for winding, metallizing, printing or laminating.

Abstract: Biaxially oriented, co-extruded polyester films comprising a base layer consisting of at least 90 wt. % thermoplastic polyester, preferably polyethylene terephthalate (PET), at least one sealable outer layer and a second non-sealable outer layer and, optionally, other intermediate layers, in addition to at least one flame-retardant agent, preferably organic phosphorous compounds. The inventive films are characterized by low inflammability, no embrittlement when subjected to thermal stress and a surface which is devoid of troublesome opacity, and are suitable for a multiplicity of uses both indoors and outside. The outer layers contain anti-blocking agents such as silicic acid having a particle diameter of preferably less than 50 nm and/or more than 2 ?m. Preferably, the sealable outer layer consists of a copolyester which is made of ethylene terephthalate and ethylene isophthalate units.

Abstract: A method of making a multilayer film is provided, including the steps of forming a core layer of a polypropylene film, monoaxially orienting the core layer in a first direction, and providing at least one multilayer cap layer to at least one side of the core layer to provide a multilayer film. The cap layer includes a non-crystallizable, amorphous polyester layer having a sufficient proportion of a non-crystallizable, amorphous polyester to render the amorphous polyester layer non-crystallizable and a first tie layer interposed between the polyester layer and the core layer, the first tie layer including an adhesive. The multilayer film is then oriented in a second direction transverse to the first direction.

Abstract: The invention relates to a co-extruded, biaxially oriented polyester films containing a flame-retardant agent which can be dissolved in the polyester. The film has a matt outer layer which contains a mixture and/or a blend of two components (I) and (II), whereby component (I) is a polyethylene terephthalate homopolymer, or a polyethylene terephthalate copolymer, or a mixture of polyethylene terephthalate homopolymers or copolymers and component (II) is a polymer containing at least one sulphonate group.

Abstract: The invention relates to biaxially oriented, co-extruded polyester films. Said films comprise a base layer which consists of at least 70% by weight of a thermoplastic polyester, preferably polyethylene terephthalate (PET) with a diethylene glycol and/or polyethylene glycol content greater than 1.3% by weight and have at least one matt outer layer and optionally additional intermediate layers. The films also contain at least one UV-absorber, preferably hydroxy benzotriazoles and triazines. The films are characterized by high UV-stability, no embrittlement after exposure to temperature, a matt surface devoid of unwanted clouding and excellent thermoforming properties and are, together with the molded bodies produced therefrom, suitable for numerous interior and exterior applications.

Abstract: The invention relates to a white, biaxially oriented film made from a crystallizable thermoplastic with high whiteness, the thickness of the film being in the range from 10 to 500 ?m. The film comprises at least one rutile-type titanium dioxide as pigment and an optical brightener, with or without other additives, and has at least one additional functionality. The expression “additional functionality” includes UV resistance, yellowing resistance, photooxidative stability, flame retardancy, and sealability. This film may have one or more of the functional properties. All of these films are capable of cost-effective thermoforming, have good orientability, and have very good optical and mechanical properties. The invention further relates to a process for its production.

Abstract: A multi-layer packaging film is provided having at least four layers arranged in sequence comprising: (1) a heat-sealing first layer comprising at least 50% by weight of a copolymer of propene, and at least one ?-olefin selected from the group consisting of ethylene, butene-1, methylpentene-1, hexene-1, octene-1, decene-1 and mixtures thereof, said copolymer having a propene content of at least 60 wt. %, a Tm between about 100° C. and about 145° C., a Mw/Mn of between 1 and 5, and n-hexane extractables of less than 4 wt. %; (2) second and fourth layers each comprising (a) at least 10 wt. % of a first copolymer of ethylene and at least one C4-C8 ?-olefin, said copolymer having a density of from 0.900 to 0.915 g/cm3 and a melt index of less than 2 dg/min., (b) at least 10 wt. % of a second copolymer of ethylene with from 4 to 18 wt. % of a vinyl ester, alkyl acrylate, acrylic or methacrylic acid, and (c) from 0 to 60 wt.

Abstract: The invention relates to a transparent, biaxially oriented polyester film with a base layer B which is composed of at least 80% by weight of a thermoplastic polyester, and with at least one outer layer A. Another polymeric layer made from a copolymer crosslinked using an acrylic and/or methacrylic compound, has been applied to that side of the film opposite to the outer layer A. The film has low oxygen transmission and exhibits very good adhesion between the respective layers. The coated film moveover has low coefficient of friction, excellent windability, and excellent antistatic performance. It is particularly suitable for packaging purposes, specifically for packaging foodstuffs or other consumable items. The invention further relates to a process for the production of the film.

Abstract: The invention relates to a multi-layered semi-finished product with at least one first and one second film layer. The semi-finished product has a velour-type structure on the outer surface of the first film layer facing away from the second film layer and the second layer has a filler material. The first and second film layers are permeable. A first proportion of a filler material in the first film layer is smaller than a second proportion of a filler in the second film layer.

Abstract: Biaxially oriented, coextruded polyester films with a base layer at least 90% by weight of which is composed of a thermoplastic polyester, preferably polyethylene terephthalate (PET), and with at least one sealable outer layer and a second nonsealable outer layer and, if desired, with other intermediate layers, and comprising at least one UV absorber, preferably hydroxybenzotriazoles and triazines, have high UV resistance, do not embrittle when exposed to high temperatures, have a surface without undesirable haze and are suitable for numerous indoor and outdoor applications. The outer layers comprise antiblocking agents, such as silica with an average particle diameter preferably below 50 nm and/or above 2 ?m, and the sealable outer layer is preferably composed of a copolyester which has been built up from ethylene terephthalate units and ethylene isophthalate units.

Abstract: A metallized, multilayer film suitable for packaging applications is provided which comprises a first skin layer comprising a thermoplastic selected from the group consisting of high density polyethylene, ethylene vinyl alcohol copolymer, medium density polyethylene, linear low density polyethylene, ethylene-propylene-butylene terpolymer, propylene-butylene copolymer, and amorphous polyamide, a metallized layer adjacent to the first skin layer, and a core layer comprising high crystallinity polypropylene homopolymer with an intermolecular stereoregularity greater than 93%. Additionally, low density polyethylene, EMA, EVA, or EAA may be extrusion laminated to the metallized side of the metallized, multilayer film at a web tension sufficient to prevent metal crazing of the vacuum deposited aluminum layer. A method for making the film is also provided.

Abstract: The invention is a formable, bright metallized laminate that has superior optical and deformation properties. The metallized laminate is made from a plurality of discontinuous metal island layers deposited on a formable clear coat film. The invention is also a method that includes depositing a first discontinuous layer of metal islands upon a formable clear coat film and then depositing a second discontinuous layer of metal islands onto the first discontinuous layer of metal islands.

Abstract: A wrap film comprising a thermoplastic resin composition and having a longitudinal direction elongation at break of less than 100% and a longitudinal direction strength at 5% elongation of 150 cN/10 mm or less is disclosed. The thermoplastic resin composition comprises a polypropylene resin and at least one resin having a flexural modulus of 100 MPa or less selected from an ethylene-propylene rubber and an ethylene-?-olefin copolymer having 4 or more carbon atoms in the ?-olefin unit.

Abstract: A transparent film whose thickness is in the range from 1 to 500 ?m and which comprises, as principal constituent, a crystallizable thermoplastic, wherein the film comprises at least one UV stabilizer as light stabilizer and at least one optical brightener, and to the use of the film, and also to a process for its production.

Abstract: The invention relates to a biaxially oriented, sealable polyester film with at least one base layer (B), with a sealable outer layer (A) and with another, non-sealable outer layer (C). The sealable outer layer (A) has a minimum sealing temperature (fin) of not more than 110° C. and a seal seam strength (fin) of at least 1.3 N/15 mm of film width. The two outer layers (A) and (C) are characterized by particular features. The film of the invention is particularly suitable for use in flexible packaging, and particularly and specifically for use on systems which operate in a vacuum.

Abstract: A polyolefin resin composition comprises (A) 10 to 100 wt % of a propylene/?-olefin random copolymer obtained by random copolymerization of propylene and a C2 to C20 ?-olefin, and having a melting point as measured by DSC of 40 to 115° C. and an ?-olefin content of 5 to 70 mol %, (B) 0 to 90 wt % of a random propylene resin having a melting point as measured by DSC of 120 to 150° C., and (C) an alicyclic saturated hydrocarbon resin having a glass transition point of 20 to 100° C. and a number average molecular weight of 1200 or less, the component (C) being used in an amount of 5 to 100 weight parts per 100 weight parts of the total amount of the components (A) and (B). A single-layer or multilayer film obtained from the polyolefin resin composition can be stretched at a lower temperature than in the conventional one, and a shrink film obtained by such a low-temperature stretching has a higher shrinkage factor than one stretched at a high temperature, and also has a small natural shrinkage factor.

Abstract: The invention relates to transparent, biaxially oriented and heat-set films having one or more layers and compris, as main constituent, at least one crystallizable thermoplastic, in particular a polyester, and also comprise at least one hydrolysis stabilizer. The hydrolysis stabilizer is preferably a phenolic compound, an oxazoline, and/or a monomeric or polymeric carbodiimide, where appropriate combined with an organic phosphite. It is preferably added in the form of a masterbatch. The film exhibits low longitudinal and transverse shrinkage. On exposure to moisture and heat it shows practically no embrittlement and retains its ultimate tensile strength. The additional functionality is preferably that the film has been made UV-resistant, or flame-retardant, or on one side or on both sides has been coated, or is sealable, and/or has been corona- or flame-treated.

Abstract: A biaxially oriented polyolefin multilayer film having a skin layer having oil-absorbing voids is disclosed. The film has substantially a small amount of void-initiating particles in the skin layer and typically no fillers in the core layer. Yet the film shows no visible distortion after exposure to food products such as potato chips.

Abstract: The invention relates to a one-sided mat, sealable, biaxially oriented polyester film with at least a base layer (B), a sealable cover layer (A) and an additional mat cover layer (C), where the sealable cover layer (A) has a minimum sealing temperature of 120° C. maximum and a seal-seam strength of at least 1.3 N/15 mm film width and where the topographies of the sealable cover layer (A) and the mat shimmering cover layer (C) have certain characteristics. The film according to this invention is suitable for the use as flexible packaging material, especially when used in connection with fast-running packaging machines.

Abstract: A multilayer film structure having at least two layers wherein the first layer comprises poly(ethylene) having a density range from about 0.93 g/cc to 0.97 g/cc; and a second layer comprising poly(ethylene) having a density range from 0.89 g/cc to 0.93 g/cc wherein the second layer is capable of forming a heat seal. The multilayer film structure is capable of being laminated to another film structure or a packaging film component. The packages of the present invention are useful for the packaging of flowable materials.

Abstract: A metallized, multi-layer film is disclosed that comprises at least a polyolefin layer, a tie layer, and a metallized lactic acid polymer layer to yield a final film having improved moisture and gas barrier, optical, and mechanical properties.

Abstract: A multilayer biaxially oriented, polyolefin film consisting of a base layer, at least one first intermediate layer and a first cover layer that is applied to said intermediate layer. The first intermediate layer is made of a terpolymer consisting of three different monomers (a), (b) and (c): whereby (a) is an olefin, (b) is an unsaturated carboxylic acid or esters thereof, and (c) is an unsaturated carboxylic acid or carboxylic acid ester, which is different from (b), or is a carboxylic acid anhydride. In addition, the first cover layer contains a copolymer, and a top layer comprising a copolymer of an olefin, and an unsaturated carboxylic acid or esters thereof, and the first cover layer additionally contains an additive.

Abstract: It is to provide a block copolymer and its copolymer composition which provides a heat shrinkable (multilayer) film with less spontaneous shrinkage while maintaining favorable low temperature shrinkability, and a heat shrinkable (multilayer) film containing the block copolymer. By using a block copolymer comprising a vinyl aromatic hydrocarbon and a conjugated diene characterized in that the relation of the loss tangent value obtained by dynamic viscoelasticity measurement with the temperature satisfies specific conditions, or a composition containing the copolymer composition as an essential component, a heat shrinkable (multilayer) film with less spontaneous shrinkability and less odor while maintaining favorable low temperature shrinkability can be obtained.

Abstract: The invention relates to a white, sealable, flame-retardant coextruded, biaxially oriented polyester film composed of at least one base layer B and of outer layers A and B applied to the two sides of this base layer. The film also comprises at least one flame retardant and one white pigment. The invention also includes the use of the film and a process for its production.

Abstract: An anti-fogging thermoplastic resin sheet is provided which has a remarkably improved strength in an anti-fogging coating film thereof, inhibiting coating film breakage during the forming, and which exerts excellent anti-fogging effects even in the case of a deep drawn formed articles and can prevent transfer of the anti-fogging coating film to the opposite surface when the anti-fogging thermoplastic resin sheet is wound in a roll. A formed article having excellent anti-fogging effects is also provided. A thermoplastic resin sheet comprising polystyrene, a polymer alloy of polystyrene and a rubber, a high-impact styrene resin, a copolymer of styrene and an acrylic monomer, polyolefin, polyethylene terephthalate, polyvinyl chloride or polyvinylidene chloride comprises on the surface thereof an anti-fogging coating film comprising a surfactant (A) and cyclodextrin or a water-soluble compound (B) in which hydroxyl groups of cyclodextrin are modified.

Abstract: Antimicrobial and antifogging polymeric films with preferable A/C/E structure useful for the food, medicine and agriculture applications as well as for other general packaging and non-traditional special applications. More preferably, antimicrobial and antifogging films having a A/B/C/E structure. Most preferably, antimicrobial and antifogging films having a A/B/C/D/E structure. A multilayer structure (having at least an skin layer (A) having antifogging and antimicrobial properties/a core layer (C)/an outer layer (E) structure) for semi and biaxially oriented polyolefin based antifogging films having advantageous properties as compared with known and commercial films such as low values of haze, high values of sheen, lower longitudinal and transverse shrinkage, which provides high dimensional stability, and excellent antifogging and antimicrobial properties. Preferably the skin layer (A), having antifogging and antimicrobial properties, is electrical corona or flame treated.

Abstract: An acrylic derived adhesive that is used for attachment of a polarizing plate having a difference of no more than 5% between an initial gel ratio and a gel ratio after the adhesive is heated at 80° C. for 500 hours is efficiently used as adhesive for polarizing plate excellent in long-term preservation quality and for optical member.

Abstract: The object of this invention is to provide a biaxially oriented polyester film suitable as a base film for high density magnetic recording media, small in track deviation and excellent in traveling durability and preservability, and to provide a production method thereof. The object of this invention can be achieved by a biaxially oriented polyester film, characterized in that the dimensional change rate (A) in the transverse direction of the film is in a range of −0.3 to 0% when the film is allowed to stand at 49° C. and 90% RH for 72 hours, while being loaded with 32 MPa in the machine direction.

Abstract: In order to disclose a structure, which performs the functions of a structured, organic, electrically conductive, transparent electrode and an orientation layer, a cost-reducing and time-saving method for producing such a structure, and uses of this structure, the invention proposes a layer on a substrate, which layer contains an organic, transparent, electrically conductive material and which has a preferred orientation, a method for producing such a layer, in which a transparent, electrically conductive layer is produced and oriented on a substrate, and a use of such a layer as a combined electrode-and orientation layer in LC displays.

Abstract: The present invention relates to a biaxially oriented film having a water wettable surface, the film containing a water wettable porous high density polyethylene (HDPE) surface layer. The water wettable surface layer contains porous HDPE and a silicone glycol coating impregnated in the pore of the HDPE surface layer. The biaxially oriented water wettable film is useful for ink jet printing.

Abstract: A thermoplastic film containing a core layer and an enhanced printing skin layer. The core layer comprises an orientation enhancing polymer, a polypropylene homopolymer, and a beta-crystal nucleators of polypropylene. The thermoplastic film may be used to enhance printing and where breathable films with good water vapor transmission are desired.

Abstract: Provided is a laminated polyester film, in which a laminated layer comprising two types of polyester resins having different glass transition points from each other is formed on at least one side of a base polyester film wherein the two types of polyester resins are composed of a polyester resin (A) having a glass transition point of from 60° C. to 100° C., and a polyester resin (B) having a glass transition point of from 0° C. to 60° C. and the polyester resin (B) contains a specified component, and a dicarboxylic acid component having a sulfonic acid metal base is set as a specified ratio of the entire dicarboxylic acid components in the polyester resins (A) and (B), satisfies adhesiveness to various types of coating materials which has conventionally been incompatible and, further, satisfies anti-blocking properties, transparency, scratch resistance and the other properties.

Abstract: The present invention relates to bioriented polyethylene films having high water vapor transmission rates (WVTR) and methods for preparing the same. The film comprises a base layer and skin layers. The base layer comprises highly cavitated polyethylene, such as medium density polyethylene (MDPE) or high density polyethylene (HDPE). The cavitating agent in the base layer may be calcium carbonate. At least one skin layer comprises (i) a copolymer of ethylene and at least one other monomer and (ii) a hydrocarbon resin, such as a cyclopentadiene resin. This copolymer (i) may be an ethylene-propylene copolymer or an ethylene-propylene-butene-1 terpolymer. The film may have unidirectional tear properties in the machine direction. This film is particularly useful for packaging food products, such as pieces of candy.

Abstract: A thermoplastic film comprising a core layer comprising a polyolefin wherein the core layer comprises the interior of the film; a first transition layer comprising a polyolefin and a silicone additive, wherein the first transition layer is exterior to the core layer; and a first skin layer comprising a polyolefin wherein the first skin layer is exterior to the first transition layer and the core layer.

Abstract: Recycleable releasing polyethylene terephthalate film coated with a coating of polyethylene emulsion, polyurethane dispersion, or a mixture of the two, with an acrylic or polyester cobinder, which film is uniaxially oriented and thereafter coated with the coating and oriented in a direction transverse to the direction of the film's uniaxial orientation to generate a biaxially oriented film having a uniaxially oriented coating and a method of making the film.

Abstract: Disclosed in this invention is a heat-shrinkable polyester film comprising a polyester film support and a coat layer formed on one or both sides of the polyester film support, said coat layer comprising a quaternary ammonium sulfate and a polysiloxane resin.

Abstract: The invention relates to an opaque biaxially oriented film made of at least one layer that contains COC. This layer contains a cycloolefin copolymer (COC) in a concentration of 0.5 to 30 wt. % with regard to this layer and contains a polymer made from aliphatic hydroxycarboxylic acid units.

Abstract: A polymer blend and mono-and multilayer films made therefrom suitable for processing or packaging articles which have an improved combination of properties e.g. such as lower tear strength and higher puncture resistance, or higher puncture resistance at both room temperature in air and at elevated temperatures in contact with water wherein the blend preferably has a first copolymer of ethylene and hexene-1 having a copolymer melting point of 80 to 98° C., preferably of 80 to 92° C.; a second copolymer of ethylene and at least one &agr;-olefin having a copolymer melting point of 115 to 128° C.; and a third copolymer of ethylene and a vinyl ester or alkyl acrylate and having a melting point of 60 to 110° C., and a process for making such films, especially shrink films having at least 40% shrink at 90° C. in at least one direction.

Abstract: The multilayer shrink film of the present invention provides very low shrink tension approximating some PVC films, while providing relatively high free shrink characteristics and relatively low shrink temperatures. The preferred film has three layers including a relatively thick core layer comprising a polymeric material or blend of polymeric materials having a relatively low melting point, typically less than about 100° C., two outer layers comprising a polymeric material or blend of polymeric materials having a relatively high melting point, typically greater than about 100° C., the material of the outer layers having a melting point at least about 10° C. higher than the melting point of the material of the core layer.