Abstract: A multilayer flexible tube includes an inner layer including a melt processable fluoropolymer, wherein the melt processable fluoropolymer includes a terpolymer including a tetrafluoroethylene, a hexafluoropropylene, and a vinylidene fluoride (THV); a tie layer including a polymeric blend of a terpolymer including a tetrafluoroethylene, a hexafluoropropylene, and a vinylidene fluoride (THV) with a poly vinylidene fluoride (PVDF), a polyamide, a polyetheramide block copolymer, or combination thereof; and an outer layer including a melt processable polymer having a shore hardness less than a shore hardness of the inner layer.

Abstract: The present invention provides a thermally insulated shipping container comprising a thermally insulating layer defining a first void, a main layer containing phase change material (main PCM layer) within the first void and defining a second void within the first void, a barrier layer containing phase change material (barrier PCM layer) within the second void and distinct from the main PCM layer, the barrier PCM layer defining a third void within the second void, the container being arranged to receive a product for transportation inside of the third void, wherein the main PCM layer has an average thickness greater than the average thickness of the barrier PCM layer, the barrier PCM layer comprises of an envelope in which the phase change material of the barrier PCM layer is contained and the barrier PCM layer is configured to maintain the phase change material with a relatively even distribution within the envelope.

Abstract: A cylindrical shrink label is provided with a heat-shrinkable label base material; and a joint formed by cylindrically forming the label base material so that the edges thereof overlap, and then solvent welding the inner surface of the outside edge, which is positioned on the outside of the cylinder, and the outer surface of the inside edge, which is positioned on the inside of the cylinder. A resin layer, which is soluble in a hot alkaline aqueous solution, is formed on the abovementioned inner surface and/or the abovementioned outer surface, which form the joint.

Abstract: A resin composition which comprises 100 parts by weight of a resin having a carboxyl group in at least part of the end of the molecular chain, 5 to 80 parts by weight of an ethylene-?-olefin copolymer, 1 to 30 parts by weight of an epoxy group-containing silicon elastomer and 0.01 to 3 parts by weight of at least one antioxidant selected from the group consisting of hindered phenol compound, phosphite compound, phosphonite compound and thioether compound and has low-temperature impact resistance and suppresses delamination.

Abstract: A foreign matter detecting apparatus includes an oscillating unit, an optical system, a receiving unit, a scanning mechanism, and an operator. The oscillating unit generates a terahertz pulse wave and emits the terahertz pulse wave as irradiation light. The optical system guides the irradiation light to the first part of the container and condenses reflected light from the container. The receiving unit outputs a signal corresponding to the condensed reflected light and also measures an echo. The scanning mechanism scans a position of the irradiation light guided on the first part in a two-dimensional manner. The operator detects foreign matter in powder in a container based on at least one of a time waveform signal, a reflection image, a power spectrum, a tomographic image, and a frequency image. The time waveform signal is output from the receiving unit in chronological order.

Abstract: A protective barrier that will typically be installed beneath ceilings during construction work being performed on ceilings or roofs of buildings. The protective barrier can be comprised entirely of one material or of different materials connected by seams. Some or all of these materials can be designed to fail when contacted by water via dissolution, melting or through some other destructive process initiated by contact with water. Some or all of the materials comprising the protective barrier can be designed to fail at a certain temperature. This failure can create access points from the ceiling through the protective barrier to the area being protected by the barrier, which can allow water from a fire suppression system to reach a fire located below the protective barrier.

Abstract: A system is described for tracking a position of a receiver medium as it travels along a media path. A heat source provides heat to the receiver medium in a localized area sufficient to permanently deform the receiver medium to form a reference mark. A light source illuminates the receiver medium, and a sensor is used to sense light from the light source that is transmitted through the receiver medium or reflected from the receiver medium thereby providing a sensed light level signal. The sensed light level signal is analyzed to determine a position of the receiver medium by detecting a change in the sensed light level signal that is characteristic of the physical deformation associated with the reference mark.

Abstract: An apparatus and method are disclosed for protecting an outer layer of a flexible pipe. The apparatus includes a protective sleeve body comprising a first end region and a further end region. At least one connector element is also provided which is securable to the first end region of the sleeve body for securing the sleeve body with respect to a flexible pipe located proximate to a wear hazard. The sleeve body is securable uncovered over a portion of an outer sheath of the flexible pipe between the outer sheath and the wear hazard to provide a protected portion of flexible pipe having a bending stiffness substantially equal to a bending stiffness of a remaining portion of the flexible pipe which is uncovered by the sleeve body.

Abstract: A textile sleeve has wall of interlaced warp yarn and weft yarn. The warp yarn extends lengthwise along a longitudinal axis of the sleeve between opposite first and second ends of the sleeve. The warp yarn is non-metallic heat-shrinkable polymeric yarn. The sleeve has at least one electro-functional member interlaced with some of the weft yarn. The at least one electro-functional yarn extends along the longitudinal axis between the first and second ends. The non-metallic polymeric warp yarns have a greater heat-shrinkage ratio than the at least one electro-functional member. The non-metallic polymeric warp yarns are caused to be shortened in the lengthwise direction along the longitudinal axis relative to the at least one electro-functional member upon being heated.

Abstract: The present invention relates to a film and a method for the production thereof, wherein a starting film web comprising at least one layer having a polypropylene content of at least 45% by weight and a polyethylene content in the same layer or in a further layer is produced, the starting film web is heated to the molten state of the polyethylene, yet to below the molten state of the polypropylene and the heated starting film web is passed through a cooled roller nip.

Abstract: A textile sleeve for protecting elongate members and method of construction thereof is provided. The sleeve includes both monofilament and multifilament yarns woven in both warp and fill directions. The warp monofilaments provide the sleeve with increased abrasion resistance, while the warp multifilaments provide the sleeve with increased flexibility and coverage protection to protect elongate members within a cavity of the sleeve. The fill monofilaments provide the sleeve with increased abrasion resistance and the fill multifilaments provide the sleeve with increased flexibility and coverage protection. The method includes weaving the warp and fill yarns in one of an open or closed wall construction.

Abstract: Flexible indicia bearing labels are placed on armored electrical cable at spaced apart intervals while the cable is being moving continuously from an armoring station to a takeup reel or accumulator. A label dispenser places labels in a U shaped recess of a body which is moveable toward engagement with the cable. Opposed rollers fold one edge of the label over into engagement with the surface of the cable and the other edge of the label over onto itself in overlapping relationship. The cable is passed through a heat tunnel to shrink the labels into tight engagement with the cable. A controller monitors movement of the cable and controls actuators for applying and folding labels onto the cable at spaced apart intervals.

Abstract: A heat shrinkable tube and system including a heat-recovered heat shrinkable tube are disclosed. The heat shrinkable tube includes an extrusion and expansion of a blend, the blend including a first polyolefin terephthalate copolymer and a second polyolefin terephthalate copolymer, the second component having a different composition from the first component. The extrusion and expansion are arranged as the heat shrinkable tube. The blend can have a glass transition temperature at least 85° C. and/or the blend can be irradiated to a higher viscosity.

Abstract: Provided is a heat-shrinkable polyester-based film having: a slow shrinkage speed; a shrinkage rate that increases gently with the increase of temperature; a large shrinkage stress; and an excellent shrinkage finish. This heat-shrinkable polyester-based film is characterized in that: the ratio (A1/A2) between the absorbancy (A1) at 1340 cm?1 of the heat-shrinkable polyester-based film measured by the polarized ATR-FTIR method and the absorbancy (A2) at 1410 cm?1 is from 0.65 to 0.9 in the main shrinkage direction of the film and from 0.45 to 0.75 in the direction orthogonal to the main shrinkage direction; and the warm-water heat shrinkage rate for when the film is immersed in 90-degree warm water for 10 seconds is from 40% to 60% in the main shrinkage direction of the film and from 0% to 12% in the direction orthogonal to the main shrinkage direction.

Abstract: A composite material in the form of a continuous structure comprises an intrinsically conducting polymer (ICP) layer coated on a substrate, the composite material having a surface area of at least 0.1 m2/g, at least 1 m2/g, or at least 5 m2/g. Methods of manufacturing the composite material comprise coating the substrate with a layer of the intrinsically conducting polymer. Electrochemical or electrical devices comprise at least one component formed of the composite material.

Abstract: A woven sleeve, sleeve assembly and methods of construction thereof are provided. The sleeve has a flexible, abrasion resistant, circumferentially closed and continuous elongate wall extending lengthwise along a central axis between opposite ends. The wall is woven with warp yarns extending generally parallel to the central axis and at least one heat-shrinkable weft yarn extending generally transversely to the warp yarns. The warp yarns provide the sleeve with coverage, abrasion resistance and flexibility and the weft yarn provides the ability to shrink the wall about an elongate member being protected within a cavity of the sleeve, as well as providing enhanced crush strength and abrasion resistance. At least one of the warp yarns and/or weft yarn includes at least one low melt, heat-fusible yarn served therewith to enhance resistance to end-fray during a cutting operation.

Abstract: An object of the present invention is to provide a tube which can be easily torn and has a large heat-shrinkability at a low temperature. The tube of the present invention is a heat-shrinkable tube having tearability, including a mixture of a fluorine resin and a different kind of resin from the fluorine resin, in which an amount of change in loss energy, ?E loss, with change in temperature from 175° C. to 185° C. is a positive value.

Abstract: The properties of melt blends of specific aliphatic-aromatic copolyesters and starch are improved by addition of a combination of polylactic acid, graft copolymers such maleic anhydride grafted polyethylene and maleic anhydride grafted polystyrene, and a hindered phenolic antioxidant. The blends exhibit increased melt strength and maximum draw down ratio versus blends of only aliphatic-aromatic copolyesters and starch. Films made from the blend are compostable and exhibit an attractive combination of mechanical and rheological properties for packaging materials.

Abstract: A heat-shrinkable white polyester film is provided which has extremely satisfactory cuttability along a perforation and has light-shielding properties. Also provided are: a label; and a process for producing the film with high productivity. The heat-shrinkable white polyester film comprises a polyester resin constituted of ethylene terephthalate as a main constituent component and containing at least 13 mol % one or more monomer ingredients capable of serving as an amorphous component among all components of the polyester resin. This film has specific heat shrinkability, specific light-shielding properties, and specific mechanical properties. The process is excellent in the productivity of the film. The label is obtained from the heat-shrinkable white polyester film.

Abstract: Disclosed is a heat shrinkable polyester film formed from a polyester resin that is mainly composed of ethylene terephthalate and contains 3-12% by mole (inclusive) of one or more monomer components, which can be amorphous components, relative to all the polyester resin components, in which the heat shrinkable polyester film has a main shrinkage direction which is the width direction. The heat shrinkable polyester film is characterized in that the shrinkage in 80° C. glycerin, the shrinkage in 130° C. glycerin and the tensile breaking strength in the longitudinal direction are controlled within specific ranges.

Abstract: The inventive heat-shrinkable polyolefin film is high in shrinkability in the longitudinal direction that is its main shrinkage direction and excellent in finish properties after shrinkage, perforated line openability, and thermal blocking resistance. The heat-shrinkable polyolefin film is characterized by particular values with respect to hot-water heat shrinkage ratio in the longitudinal and width directions, right angle tear strength in the width direction, and heat-resistant peel strength.

Abstract: A heat-shrinkable polyester film having a heat-shrinkage change per degree Celsius (%/° C.) along the main shrinkage direction of 1.5 to 3.0 in the range of 60° C. to 70° C., 2.5 to 3.5 in the range of 70° C. to 80° C., 1.0 to 2.0 in the range of 80° C. to 90° C., and 0.1 to 1.0 in the range of 90° C. to 100° C., has a good appearance quality after shrinkage and thus suitable for a wrapping material, particularly a label for a bottle.

Abstract: Provided are a non-halogen flame-retardant resin composition that contains a base polymer mainly containing a polyolefin-based resin, that passes a flame test, and that has good heat resistance and good heat-aging resistance which can satisfy a 150° C. rating, and an insulated electric wire and a tube using the non-halogen flame-retardant resin composition. The non-halogen flame-retardant resin composition contains (A) a base polymer containing 90% by mass or more of a mixture of a polyolefin-based resin and a styrene-based elastomer; (B) a metal phosphinate; and (C) a nitrogen-based flame retardant, and is used as an insulating coating layer. The insulating coating layer and the tube are preferably cross-linked by irradiation with ionizing radiation.

Abstract: Disclosed is a thermo-shrinkable polyester film having superior thermal shrinkage properties. The thermo-shrinkable polyester film has a strength of 3.5˜6.5 kg/mm2 in a direction perpendicular to a main shrinking direction at an initial elongation less than 10%, an elongation at rupture of 50˜700% in a direction perpendicular to a main shrinking direction, a thickness uniformity (?R) of 4 or less and a shrinkage ratio of 5% or less in a direction perpendicular to a main shrinking direction, thus preventing the rupture thereof in a rolling process and so on and ensuring process stability and productivity.

Abstract: A heat-shrinkable polylactic acid (PLA) film and a method of its manufacture are provided. In an exemplary embodiment, the PLA films exhibit heat-induced shrinkage in the transverse direction with little to no concomitant shrinkage in the machine direction. The films may comprise any grade of PLA polymer, optionally including additives, such as antiblock, slip, plasticizers, viscosity enhancers and combinations thereof. A method of cast and tenner manufacture is disclosed, which includes a temperature conditioning step.

Abstract: A blow molding having capacity of at least 250 ml, having a shell which is composed of impact-resistant polystyrene and which is produced via injection stretch blow molding where an average aspect ratio of rubber particles derived from longitudinal section and an average aspect ratio of rubber particles derived from cross section measured in transmission electron micrographs is greater than 4 respectively, and a biaxial orientation of the rubber particles, given by the ratio of the aspect ratio derived from cross section to the aspect ratio derived from longitudinal section is smaller than 3.

Abstract: The present invention relates to a heat-shrinkable polyester film, which has a heat-shrinkage of 20% or more in both the longitudinal and transverse directions when treated with 80° C. water for 30 seconds and a bidirectional balance parameter in the range of 0.25 to 2.5 and exhibits an excellent properties in die-cutting and removing from a container such as a glass bottle for recycling by washing with hot water.

Abstract: Biodegradable aliphatic/aromatic copolyester comprising: A) an acid component comprising repeating units of: 1) 53 to 54 mol % of an aromatic carboxylic acid; 2) 47 to 36 mol % of an aliphatic acid at least 50% of which is azelaic acid; B) a diol component selected from the group consisting of C3, C4 and C6 diols said AAPE being disintegrated according to the Standard ISO 20200 in 90 days.

Abstract: The properties of melt blends of specific aliphatic-aromatic copolyesters and starch are improved by addition of a combination of polylactic acid, graft copolymers such maleic anhydride grafted polyethylene and maleic anhydride grafted polystyrene, and a hindered phenolic antioxidant. The blends exhibit increased melt strength and maximum draw down ratio versus blends of only aliphatic-aromatic copolyesters and starch. Films made from the blend are compostable and exhibit an attractive combination of mechanical and rheological properties for packaging materials.

Abstract: Biodegradable aliphatic/aromatic copolyester comprising 50 to 60 mol % of an aromatic dicarboxylic acid and 40 to 50 mol % of an aliphatic acid, at least 90% of which is a long-chain dicarboxylic acid (LCDA) of natural origin selected from azelaic acid, sebacic acid, brassylic acid or mixtures thereof; and a diol component.

Abstract: A heat-shrinkable film having a layer made of a mixed resin containing a polylactic acid resin and a polyolefin resin as the main components, wherein the mass ratio of the polylactic acid resin and the polyolefin resin is 95/5 to 50/50, the polylactic acid resin is a copolymer of D-lactic acid and L-lactic acid or a mixed resin of the copolymer, the D/L ratio of D-lactic acid and L-lactic acid is 3/97 to 15/85 or 85/15 to 97/3, the storage elastic modulus of the polyolefin resin or the soft acrylic resin at 20° C. is ?100 MPa as measured at an oscillation frequency of 10 Hz and a strain of 0.1%, the film is stretched in at least one direction, and the heat shrinkage ratio of the film in the main shrinking direction is ?20% as measured after the film is immersed in 80° C. water for 10 seconds.

Abstract: Biodegradable aliphatic/aromatic copolyester comprising: A) an acid component comprising repeating units of: 1) 49 to 63 mol % of an aromatic carboxylic acid; 2) 51 to 37 mol % of an carboxylic acid, at least 50% of which is brassylic acid; B) a diol component; said copolyester being disintegrated according to the Standard ISO 20200 in 90 days.

Abstract: Biodegradable aliphatic/aromatic copolyester comprising 49 to 66 mol % of an aromatic polyfunctional acid; 51 to 34 mol % of an aliphatic acid, at least 70% of which is sebacic acid; and butandiol; and blends containing such copolyester.

Abstract: Disclosed are hot-melt adhesives prepared from aromatic-aliphatic polyesters containing terephthalic acid in combination with adipic acid, glutaric acid, or a mixture thereof, as diacid components and a diol component containing 1,4-butanediol, 1,6-hexanediol, or a combination thereof. These adhesives set up rapidly within a well-defined temperature window. The hot-melt adhesives can be used in a variety of applications, but are especially suited as seaming adhesives for roll-applied labels. These adhesives have melting temperatures and crystallization properties that allow their application at temperatures cool enough to prevent curling and premature shrinkage of the shrink label during seaming, and yet produce strong label seams that can withstand the elevated temperatures of a shrink tunnel without sacrificing line speed. Also disclosed are labeled containers and a process for applying a roll-on, shrink label to a container using the hot-melt adhesives of the invention.

Abstract: A heat-shrinkable film having a layer made of a mixed resin containing a polylactic acid resin and a polyolefin resin as the main components, wherein the mass ratio of the polylactic acid resin and the polyolefin resin is 95/5 to 50/50, the polylactic acid resin is a copolymer of D-lactic acid and L-lactic acid or a mixed resin of the copolymer, the D/L ratio of D-lactic acid and L-lactic acid is 3/97 to 15/85 or 85/15 to 97/3, the storage elastic modulus of the polyolefin resin or the soft acrylic resin at 20° C. is ?100 MPa as measured at an oscillation frequency of 10 Hz and a strain of 0.1%, the film is stretched in at least one direction, and the heat shrinkage ratio of the film in the main shrinking direction is ?20% as measured after the film is immersed in 80° C. water for 10 seconds.

Abstract: The present invention provides a heat-shrinkable polyphenylene sulfide-based tube containing a resin composition (A) including a thermoplastic polyphenylene sulfide-based resin (a) as a main constituent, having a difference of 35° C. or more between the cold crystallization temperature Tc as measured by a differential scanning calorimetry in accordance with JIS-K7121 and the glass transition temperature Tg measured in the same manner, and having the glass transition temperature Tg between 65° C. and 85° C.; and the invention provides a component covered with the tube. The heat-shrinkable polyphenylene sulfide-based tube fulfills the characteristics required for a heat-shrinkable tube, such as heat resistance, low-temperature shrinkage characteristics, electrical characteristics, chemical resistance, and electrolytic solution resistance.

Abstract: A heat-shrinkable sleeve (3) made of a self-releasing material and having a linear seam is disclosed along with methods of employing a heat-shrinkable sleeve (3) in a process of manufacturing composite parts, either as a release layer between the composite part (9) and tool (7), or on a composite material to provide a consolidation force to the composite part (9).

Abstract: A heat-shrinkable polylactic acid (PLA) film and a method of its manufacture are provided. In an exemplary embodiment, the PLA films exhibit heat-induced shrinkage in the transverse direction with little to no concomitant shrinkage in the machine direction. The films may comprise any grade of PLA polymer, optionally including additives, such as antiblock, slip, plasticizers, viscosity enhancers and combinations thereof. A method of cast and tenner manufacture is disclosed, which includes a temperature conditioning step.

Abstract: The present invention is directed to a method of producing a thermoformable composite by crosslinking PHA and PLA together in the presence of an additive to produce PHA and PLA blend and resins having: (a) a Ts value of up to about 180° C.; and (b) a heat distortion index of up to about 160° C. The thermoformable composite is used to make a food or beverage cup, lid, cutlery item, foodservice item, molded tray, or food storage container. The thermoformable composite comprises from about 5% to about 95% by weight of polylactic acid (PLA), from about 5% to about 95% by weight polyhydroxyalkanoate (PHA) polymer, and from about 0.01% to about 60% additives wherein the PLA and PHAs being crosslink together by intermolecular means to enhance performance and processability.

Abstract: A heat-shrinkable polyester film is obtained which is extremely satisfactory in openability along a perforation, has exceedingly high productivity, and is less apt to split in the lengthwise direction in processing, e.g., printing. Provided is a label which is formed from the heat-shrinkable film and is satisfactorily tearable. The label is one formed from a tubular material which comprises as a base a heat-shrinkable film thermally shrinking mainly in the film width direction and which has been cut according to an object to be packaged, both edges in the film width direction having been bonded to each other. The tubular material has been thermally shrunk to constitute the label, with which at least part of the periphery of the object to be packaged is covered. The label has an angle tear strength in the direction perpendicular to the main shrinkage direction (i.e., in the film length direction) of 100-310 N/mm and a tensile break strength in the direction perpendicular to the main shrinkage direction (i.e.

Abstract: Biodegradable aliphatic/aromatic copolyester comprising: A) an acid component comprising repeating units of: 1) 53 to 54 mol % of an aromatic carboxylic acid; 2) 47 to 36 mol % of an aliphatic acid at least 50% of which is azelaic acid; B) a diol component selected from the group consisting of C3, C4 and C6 diols; said AAPE being disintegrated according to the Standard ISO 20200 in 90 days.

Abstract: Biodegradable aliphatic/aromatic copolyester comprising 50 to 60 mol % of an aromatic dicarboxylic acid and 40 to 50 mol % of an aliphatic acid, at least 90% of which is a long-chain dicarboxylic acid (LCDA) of natural origin selected from azelaic acid, sebacic acid, brassylic acid or mixtures thereof; and a diol component.

Abstract: Biodegradable aliphatic/aromatic copolyester comprising 49 to 66 mol % of an aromatic polyfunctional acid; 51 to 34 mol % of an aliphatic acid, at least 70% of which is sebacic acid; and butandiol; and blends containing such copolyester.

Abstract: A chlorinated polyolefin composition suitable for use in the manufacture of crosslinked, thermoset, flame-retardant articles such as jackets for electrical or fiber optic cables, insulating coatings or layers for electrical conductors, and heat-shrinkable tubing, sheets or other shapes for protection of cable connectors and splices. The composition is thermosetting and moisture curable and comprises a chlorinated polyolefin such as chlorinated polyethylene or chlorosulfonated polyethylene and a non-chlorinated polyolefin which contains moisture crosslinkable silane groups. The non-chlorinated polyolefin preferably comprises polyethylene or a copolymer thereof. Exposure of the composition to moisture causes the formation of intermolecular crosslinks between molecules of the non-chlorinated polyolefin.

Abstract: Shaped articles made with a partially crystalline, cycloolefin elastomer of norbornene and ethylene typically having at least one glass transition temperature (Tg) in the range of from ?10° C. to 15° C. and a crystalline melting temperature in the range of from 60° C. to 125° C. and a % crystallinity by weight in the range of from 5% to 40%. The shaped articles may be in the form of medical tubing; a contact lens mold or component thereof; a container such as a bottle, a squeeze bottle or a squeeze tube; an eyedropper or eyedropper component; an elastomeric closure, optionally a pierceable elastomeric closure or the shaped article is selected from shrink film and/or shrink tubing.

Abstract: A stretch mold container of the present invention is obtained by draw-forming a resin composition containing a poly-L-lactic acid (A) and a poly-D-lactic acid (B) at a molar ratio A:B in a range of 95:5 to 60:40, and has an amount of heat shrinkage of 5.0% or less under heat treatment conditions of 65° C.×24 hours. Despite of being made from the polylactic acids, the stretch mold container exhibits excellent heat resistance.

Abstract: The invention relates to a container (1) comprising a transparent cylindrical container wall (2) and an envelope (8) covering the entire container wall. Such containers are used in the form of a vial, an ampulla or a syringe, for example, in clinical tests of medicaments or remedies. According to the invention, the envelope is embodied in an opaque manner such that it can be determined whether undissolved particles are still present in the liquid, but the actual color of the content cannot be determined.

Abstract: A heat-shrinkable polylactic acid (PLA) film and a method of its manufacture are provided. In an exemplary embodiment, the PLA films exhibit heat-induced shrinkage in the transverse direction with little to no concomitant shrinkage in the machine direction. The films may comprise any grade of PLA polymer, optionally including additives, such as antiblock, slip, plasticizers, viscosity enhancers and combinations thereof. A method of cast and tenner manufacture is disclosed, which includes a temperature conditioning step.

Abstract: A film roll of a heat-shrinkable polyester film characterized in that the heat-shrinkable polyester film meets the following requirements (1) and (2). (1) When samples are cut off therefrom at an almost equal interval along the longitudinal direction, and immersed in hot water at 85° C. for 10 seconds, subsequently in water at 25° C. and withdrawn, heat-shrinkage percentages in the maximum shrinkage direction of all the samples are 20% or more. (2) When raw polymers used for production of the film above comprises of a major constitutional unit and one or more sub constitutional units different therefrom; and the content of the primary sub constitutional unit is determined, the content of the primary sub constitutional unit in each sample is more than 7 mole % in 100% of all constitutional units, and when an average of the contents of the primary sub constitutional unit is calculated, the contents thereof of all the samples fall within a range of ±2 mole % relative to the average.

Abstract: A heat-shrinkable polylactic acid (PLA) film and a method of its manufacture are provided. In an exemplary embodiment, the PLA films exhibit heat-induced growth in the cross direction with concomitant shrinkage in the machine direction. The films may comprise any grade of PLA polymer, optionally including additives, such as antiblock, slip, viscosity enhancers and combinations thereof. A method of manufacture is disclosed which includes a post-extrusion temperature conditioning step.