The present invention relates to a biaxially oriented formable polyester film having A/B/A layer structure and the process of preparing the same. The biaxially oriented formable polyester films exhibit improved Dart impact, elongation and formability comparable to nylon film which are used for thermoforming and cold forming applications.

Methods of forming composite materials, which may include filament winding two or more carbon nanotube yarns to form one or more material layers, contacting the yarns with a resin, and applying one or more stretching forces to the material layers. Composite materials also are provided.

The present invention relates to the use of an anisotropic fluoropolymer having a different intrinsic thermal conductivity in at least two directions as a heat conducting material in a thermally conductive article, to a thermally conductive article comprising said anisotropic fluoropolymer and to a process for the production of said anisotropic fluoropolymer.

A polymeric material having a multimodal pore size distribution is provided. The material is formed by applying a stress to a thermoplastic composition that contains first and second inclusion additives dispersed within a continuous phase that includes a matrix polymer. Through the use of particular types of inclusion additives and careful control over the manner in which such additives are dispersed within the polymer matrix, the present inventors have discovered that a unique, multimodal porous structure can be achieved.

A polymeric material having a multimodal pore size distribution is provided. The material is formed by applying a stress to a thermoplastic composition that contains first and second inclusion additives dispersed within a continuous phase that includes a matrix polymer. Through the use of particular types of inclusion additives and careful control over the manner in which such additives are dispersed within the polymer matrix, the present inventors have discovered that a unique, multimodal porous structure can be achieved.

A method for making low shrink polyester films wherein the films are arranged in stacks, tentered, heat treated, and relaxed in unison. Also, polyester films produced by such method.

A method for preparing a lithium-ion battery separator is disclosed. The method comprises: cooling and shaping a liquid-phase stabilization system containing polyethylene, stretching to enlarge pores, extracting with a solvent, and heat-setting to obtain a lithium-ion battery separator, wherein the stretching includes pre-stretching and synchronous bidirectional stretching, and the pre-stretching is completed before the synchronous bidirectional stretching.

The present teaching relates to a recyclable, easily tearable packaging laminate having a good barrier effect, including a first laminate layer and a second laminate layer. The first laminate layer is a co-extruded and bidirectionally stretched composite consisting of a substrate layer having an HDPE content of at least 60 vol. %, a connecting layer and a barrier layer consisting of a barrier polymer, preferably polyamide or ethylene vinyl alcohol copolymer, having a thickness of maximum 20% of the total thickness of the first laminate layer. The connecting layer is arranged between the substrate layer and the barrier layer, and the first laminate layer is connected, at its barrier layer, to the second laminate layer.

A heat shrinkable film shows a heat shrinkage rate in the direction perpendicular to the main shrinkage direction that is not high even at high temperature and is printable thereon. The heat shrinkable film includes a polyester resin, wherein the heat shrinkage characteristics in the direction perpendicular to the main shrinkage direction satisfy the following Relationships 1 and 2:

−15≤ΔT.sub.70-65≤0  Relationship 1

0≤ΔT.sub.100-95≤5  Relationship 2 wherein ΔT.sub.X-Y is a value obtained by subtracting heat shrinkage rate of the heat shrinkable film in the direction perpendicular to the main shrinkage direction after the heat shrinkable film is immersed in water bath for 10 seconds at Y° C. from heat shrinkage rate of the heat shrinkable film in the direction perpendicular to the main shrinkage direction after the heat shrinkable film is immersed in water bath for 10 seconds at X° C.

The tube is stretchable. The tube is stretched by applying tension in a longitudinal direction. The tube returns to its short state by releasing the above-described tension applied in the longitudinal direction. A plurality of protrusions are formed on an inner surface of the tube. Each of the plurality of protrusions extends in a circumferential direction. The plurality of protrusions are arranged side by side in the longitudinal direction of the tube. A pitch of the protrusions is less than or equal to 1.5 μm.