The present disclosure is directed to a film formulation that resulted in a substantially non-migratory cold seal release film with improved blocking resistance. Specifically, the multilayered biaxially oriented polypropylene film can include a core layer of polypropylene homopolymer; a first outer layer on one side of the core layer that can be suitable for sealing, printing, or coating; and a second outer layer on the opposite side of the core layer that is a blocking resistant layer comprising thermoplastic polymers which reduce blocking tendency.

A device and method for blowing and stretching a plastic film are provided. A first blow-expanding mechanism subjects a primitive plastic film made of PVC, PLA, or PET to extrusion at a temperature of 140° C.-180° C. and primary blow-expansion to form a volume in which the primitive plastic film has a lateral opening ratio of 1:1. Front-stage press rollers and middle-stage press rollers then subject the primitive plastic film to primary longitudinal press-flattening and pull-stretching, followed by heating and blow-expanding by the second blow-expansion mechanism at a temperature of 160° C.-220° C. and a pressure of 1.1-1.6 atm to achieve a volume in which the primitive plastic film has lateral opening ratio of at least 2:1, further followed by reduction of temperature to a temperature of 10° C.-20° C. for shape fixing to form a shaped plastic film. Finally, rear-stage press rollers subject the shaped plastic film to secondary longitudinal press-flattening and pull-stretching.

The present disclosure is directed to a film formulation that resulted in a substantially non-migratory cold seal release film with improved blocking resistance. Specifically, the multilayered biaxially oriented polypropylene film can include a core layer of polypropylene homopolymer; a first outer layer on one side of the core layer that can be suitable for sealing, printing, or coating; and a second outer layer on the opposite side of the core layer that is a blocking resistant layer comprising thermoplastic polymers which reduce blocking tendency.

Provided is a method of manufacturing an adaptable pre-cast resin-infused carbon-fiber beam, which method includes the steps of arranging a plurality of elongate carbon-fiber blocks side by side; arranging sheets to enclose the blocks and to extend over opposing faces of adjacent blocks; arranging the sheets to converge as an outwardly projecting elongate bead at a junction between adjacent blocks; and pulling on the elongate bead to inhibit resin flow between blocks during a resin infusion step. Also provided is a pre-cast adaptable carbon-fiber beam manufactured using that method; a method of manufacturing a wind turbine rotor blade; and a wind turbine rotor blade.

A biaxially oriented polyester film having the following physical property is provided: when cooled from the molten state at a cooling rate of 20° C/min, an observed recrystallization temperature is 175° C-200° C. The biaxially oriented polyester film is formed by a thick sheet before bidirectional stretching that is melted and extruded by an extruder and then cooled and formed on a casting roll. The thick sheet before stretching having the following physical property as analyzed by differential scanning calorimetry: a crystallization rate is less than 10%.

The present invention relates to a polymer comprising moieties derived from ethylene and moieties derived from 1-hexene, wherein the polymer has: (a) a density of ≥910 and ≤930 kg/m.sup.3 as determined in accordance with ASTM D1505 (2010); (b) a melt mass-flow rate of ≥0.5 and ≤5.0 g/10 min, as determined in accordance with ASTM D1238 (2013) at a temperature of 190° C. under a load of 2.16 kg; (c) a fraction that is not eluted in analytical temperature rising elution fractionation (a-TREF) at a temperature >30.0° C. of ≥8.0 wt %, with regard to the total weight of the polymer; and (d) a fraction eluted in a-TREF at a temperature >94.0° C. of ≥20.0 wt %, with regard to the total weight of the polymer. Such polymer allows for the production of bi-directionally oriented films having a particularly desirable ability to be stretched at a high stretching ratio, in both the machine direction and in the transverse direction, and particularly to be stretched to a high stretching ratio in the machine direction and the transverse direction combined. Further this polymer allows for production of bi-directionally oriented films within a particularly and desirably broad temperature range in which the stretching can be performed without imparting any deficiencies of hampering the film production processes in continuous film production.

The present invention relates to a biaxially oriented polyester reflective film capable of retaining excellent reflection characteristics even after vacuum compression molding and hot press molding by suppressing deformation of an internal porous layer of the reflective film during molding, and a process of producing the same.

An improved control apparatus for producing plastic films and an associated improved method are distinguished, inter alia, by the following features: —the control apparatus has two stages or at least two stages, —the control apparatus comprises, for this purpose, a sensor module and/or a sensor model and a process module and/or a process model, —the machine-dependent sensor module and/or sensor model and the production-dependent process module and/or process model are linked or can be linked to one another via production variables, —adjustable machine variables are connected or linked to plant production variables via the sensor module and/or the sensor model.

The present disclosure is directed to a film formulation that resulted in a substantially non-migratory cold seal release film with improved blocking resistance. Specifically, the multilayered biaxially oriented polypropylene film can include a core layer of polypropylene homopolymer; a first outer layer on one side of the core layer that can be suitable for sealing, printing, or coating; and a second outer layer on the opposite side of the core layer that is a blocking resistant layer comprising thermoplastic polymers which reduce blocking tendency.

The present disclosure relates to a process for producing bi-axially oriented polyester (BOPET) film from the recycled polyethylene terephthalate (RPET) granules. The process involves preparing recycled PET (RPET) granules form post-consumer recycled PET (PCR PET) by depolymerization and polycondensation followed by preparing the biaxially oriented polyethylene terephthalate (BOPET) film having recycled polyethylene terephthalate (RPET) up to 100%. The bi-axially oriented polyester film has good elongation, mechanical and/or thermal properties and are similar in quality to virgin PET films useful in high end food and pharma packaging and industrial applications.