A method for preparing a thermoplastic polyurethane film having a large thickness and excellent durability, and a thermoplastic polyurethane film prepared thereby are provided.

A method for preparing a thermoplastic polyurethane film having a large thickness and excellent durability, and a thermoplastic polyurethane film prepared thereby are provided.

A method of identifying a defect in a wet film comprises conveying said wet film (20), in a wet state, on a conveyor (10), providing a laser projection (1511) onto the wet film, acquiring a series of images, each depicting an area of the wet film, wherein at least a portion of the laser projection is visible, and using at least some of said images to identify said defect. There is also disclosed a method and device for producing a film.

A process for producing a unitary graphene matrix composite, the process comprising: (a) preparing a graphene oxide gel having graphene oxide molecules dispersed in a fluid medium, wherein the graphene oxide gel is optically transparent or translucent; (b) mixing a carbon or graphite filler phase in said graphene oxide gel to form a slurry; (c) dispensing said slurry onto a surface of a supporting substrate or a cavity of a molding tool; (d) partially or completely removing the fluid medium from the slurry to form a composite precursor; and (e) heat-treating the composite precursor to form the unitary graphene composite at a temperature higher than 100° C. This composite exhibits a combination of exceptional thermal conductivity, electrical conductivity, mechanical strength, surface hardness, and scratch resistance.

A process for producing a unitary graphene matrix composite, the process comprising: (a) preparing a graphene oxide gel having graphene oxide molecules dispersed in a fluid medium, wherein the graphene oxide gel is optically transparent or translucent; (b) mixing a carbon or graphite filler phase in said graphene oxide gel to form a slurry; (c) dispensing said slurry onto a surface of a supporting substrate or a cavity of a molding tool; (d) partially or completely removing the fluid medium from the slurry to form a composite precursor; and (e) heat-treating the composite precursor to form the unitary graphene composite at a temperature higher than 100° C. This composite exhibits a combination of exceptional thermal conductivity, electrical conductivity, mechanical strength, surface hardness, and scratch resistance.

The present document discloses a method of determining thickness of a wet film, in particular of microfibrillated cellulose. The method comprises conveying said film (20) in a wet state on a conveyor (10) having a conveyor width, the wet film having a film width which is less than the conveyor width, providing a laser projection (1511) across a film edge, acquiring a series of images, each depicting an area of the conveyor, wherein the laser projection, a portion of the film and a portion of an exposed conveyor surface are visible, and using at least some of said images to determine at least one of a film thickness and a film thickness distribution across the film width. The document also discloses a method of forming a film, in particular a microfibrillated cellulose film, and a device for producing such film.

A heat insulation pad and method of making the same, battery assembly and device are provided. In some embodiments, the heat insulation pad includes silicon rubber and aerogel dispersed in the silicon rubber, wherein the heat insulation pad satisfies that: a temperature difference between a surface on one side of the heat insulation pad and a surface on the other side opposite to the one side is ≥150° C., when the surface on one side of the heat insulation pad is contacted with hot surface having a temperature of 600° C. for 5 minutes under a pressure of 0.9 MPa followed by pressure relief and then is contacted with hot surface having a temperature of 600° C. for another 20 minutes. By using the heat insulation pad of the present disclosure, the safety performance of the battery assembly and of the device can be improved.

The present invention relates to an MDO heat-shrinkable film of a copolymer polyester having excellent thermal resistance. In particular, the present invention provides a copolymer polyester MDO (machine direction orientation) thermoresistant heat-shrinkable film that consists of a copolymer polyester resin including isosorbide and 1,4-cyclohexanedimethanol at an optimized content ratio as a diol component copolymerized with an acid component including terephthalic acid, and having a number average molecular weight of 18,000 g/mol or more, and can be used for labels, cap seals, direct packaging, etc. of various containers due to the high shrink initiation temperature.

The present invention relates to an MDO heat-shrinkable film of a copolymer polyester having excellent thermal resistance. In particular, the present invention provides a copolymer polyester MDO (machine direction orientation) thermoresistant heat-shrinkable film that consists of a copolymer polyester resin including isosorbide and 1,4-cyclohexanedimethanol at an optimized content ratio as a diol component copolymerized with an acid component including terephthalic acid, and having a number average molecular weight of 18,000 g/mol or more, and can be used for labels, cap seals, direct packaging, etc. of various containers due to the high shrink initiation temperature.

One embodiment relates to a method for preparing a polyamide-imide film which is colorless and transparent and has good mechanical properties, easily and efficiently in terms of yield. Particularly, the embodiment relates to a preparation method capable of obtaining a polyamide-imide film of which the optical characteristics, mechanical properties and flexibility are harmoniously improved without complicated processes, by controlling the amount of imide repeating units and amide repeating units constituting the polyamide-imide film.