The present invention relates to a method and apparatus for cooling. An exemplary apparatus includes an annular cooling ring operable for receiving a flow of a molten film bubble and expelling a flow of cooling gas, the annular cooling ring comprising a middle lip and an adjacent radially spaced apart outer lip, the middle lip having an extended length longer than the outer lip, a radially inner surface of the outer lip and a radially outer surface of the middle lip define a channel operable to allow the flow of cooling gas along the radially outer surface of the middle lip, wherein the middle lip is located radially intermediate the channel and the molten film bubble, and wherein the middle lip isolates the molten film bubble from the flow of cooling gas until the flow of cooling gas passes beyond the extended length of the middle lip.

The present invention relates to a multilayer, coextruded polyester film including at least one outer layer (A) and a base layer (B), in which the at least one outer layer (A) includes, to an extent of at least 60 wt %, a polyester or a copolyester formed from units derived from aliphatic dicarboxylic acids and diols, wherein the units derived from dicarboxylic acids are selected from one or more dicarboxylic acids from the group of succinic acid, adipic acid, suberic acid, azelaic acid and sebacic acid, and the units derived from diols are selected from one or more diols from the group of ethylene glycol, 1,3-propanediol, 1,4-butanediol and neopentyl glycol.

The present invention further relates to a process for producing the film according to the invention, to the use thereof and to a process for recycling the polyester film according to the invention.

Disclosed are a variable-temperature yarn with a continuous sense of cold and a manufacturing method thereof. A fiber of the variable-temperature yarn with a continuous sense of cold comprises a skin part and a core part, wherein the core part is wrapped in the skin part and is made of a PCM or phase-change energy-storage wax, and a cross-sectional area of the PCM or phase-change energy-storage wax accounts for 5%-70% of a cross-sectional area of the fiber. More PCMs can be directly injected into a fiber core, so that a textile product has a stronger sense of cold, the sense of continuous cold of the product is greatly improved, the requirement of users for cold experience is better met, and the market blank is filled.

An ultra-high-molecular-weight fiber manufacturing method is provided. The method includes: removing moisture in a mixed liquid to form a to-be-processed raw material, and supplying the to-be-processed raw material to a spinning device, where the spinning device heats the to-be-processed raw material in different stages, to make the to-be-processed raw material form a semi-molten state and be extruded toward a discharge outlet, to spin at least one fibril; cooling the at least one fibril, to form a first wire; if hardness of the first wire is not in a hardness range, selecting at least two discontinuous heating zones located in the spinning device to perform temperature adjustment; stretching, heating, and re-stretching the first wire, to form a second wire; winding the second wire around a drum; and stretching, drying, and re-stretching the second wire, to form a final wire product.

A mechanically and piezoelectrically anisotropic polymer thin film may be formed by gel casting a solution that includes a crystallizable polymer and a liquid solvent. The solvent may be configured to interact with the polymer to facilitate chain alignment and, in some examples, create a higher crystalline content within the cast thin film. The thin film may also include up to approximately 90 wt. % of an additive and may be characterized by a bimodal molecular weight distribution of a crystallizable polymer where the molecular weight of the additive may be less than the molecular weight of the crystallizable polymer. In some examples, the polymer(s) and the additive(s) may be independently selected from vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, hexafluoropropene, vinyl fluoride, etc. The anisotropic polymer thin film may be characterized by an electromechanical coupling factor (k.sub.31) of at least 0.1.

A biaxially stretched polyester film and a method for producing the same are provided. The biaxially stretched polyester film includes a polyester resin base layer and a matte layer. The polyester resin base layer includes: (1) 50 to 95 wt % of a polyester resin base material, and an intrinsic viscosity of the polyester resin base material being between 0.5 and 0.8 dL/g; and (2) 0.01 to 5 wt % of a high viscosity polyester resin material, and an intrinsic viscosity of the high viscosity polyester resin material being between 0.9 and 1.1 dL/g. The matte layer includes: (1) 50 to 95 wt % of a polyester resin matrix material, and an intrinsic viscosity of the polyester resin matrix material being between 0.5 and 0.8 dL/g; and (2) 0.3 to 40 wt % of a plurality of filler particles, and the filler particles having an average particle size of between 0.15 μm and 10 μm.

The present patent application relates to a method of manufacturing a multilayered composite film comprising a step of co-extruding at least three layers (a), (b) and (c), of which the layer (a) forms an outward surface of the composite film; the layer (c) forms a surface of the composite film facing or coming in contact with a good to be packaged; and the layer (b) is disposed between the layer (a) and the layer (c). Further, the method includes a step of biaxial orientation of the composite film thus co-extruded. Therein, the layer (a) contains or consists of a thermoplastic resin. The layer (b) contains or consists of a polyvinylidene chloride (PVdC) resin. The layer (c) contains or consists of a resin, preferably sealable, in particular heat-sealable resin. Therein, any crosslinking of the composite film by means of radioactive radiation, in particular by means of beta, gamma, X-ray and/or electron irradiation, is omitted during the manufacturing of the composite film and/or thereafter.

A coextruded, multi-layered, water vapor-impermeable, tubular, and seamless food casing having at least three layers is provided. The layers include at least one porous layer having a porous food contact side suitable for transferring food additives having a porous food contact side, at least one carrier layer based on at least one aliphatic and/or partially aromatic (co-)polyamide, and at least one water vapor-impermeable layer. At least one adhesive layer including an adhesion-promoting component is arranged between the adjoining layers or an adhesion-promoting component is contained in one or more of the water vapor-impermeable layer(s). At least one porous layer includes an aliphatic (co-)polyamide and a hydrophilic (co-)polymer having a mean molar mass M.sub.w of at least 8000 Da. A method for producing the food casing is provided. The food casing is used as an artificial sausage casing, especially, for cooked or boiled sausage.

The present invention relates to an adhesive sheet laminate which comprises a substrate layer composed of a thermoplastic resin composition (A) containing a polypropylene-based resin as a main component, an adhesive layer composed of a thermoplastic resin composition (B) containing a specific thermoplastic resin (b) as a main component and having a melt flow rate of 0.1 to 30 g/10 min, and a release layer composed of a thermoplastic resin composition (C) containing a specific thermoplastic resin (c) as a main component and having a melt flow rate of 0.1 to 30 g/10 min, and which has a tensile elastic modulus of 2000 MPa or more.

There is provided a multilayer structure comprising at least a barrier resin layer (X) and an inorganic barrier layer (Y) with a thickness of 500 nm or less which is adjacent to the barrier resin layer (X), wherein the layer (X) is made of a resin composition (x) comprising an ethylene-vinyl alcohol copolymer (A) and a polyamide (B) in a mass ratio (A/B) of 55/45 to 98/2, and the ethylene-vinyl alcohol copolymer (A) has an ethylene content of 20 to 46 mol % and a saponification degree of 90 mol % or more. Thus, there can be provided a multilayer structure having excellent gas barrier properties and appearance even after being subjected to stretching process or retorting process followed by bending process, and a packaging material for retort therewith.