Abstract: Provided are a thermoplastic elastomer (TPE) physically-foamed roll and a semi-continuous preparation method thereof. In the preparation method, the desorption of a high-pressure fluid is inhibited by controlling a solubility of the high-pressure fluid in a TPE roll and then subjecting the material to a quick freezing and gas-locking treatment at a specific temperature, and an impregnated roll can be stored at a low temperature for a long time or subjected to long-distance transportation, and can be stably subjected to continuous heating and foaming, which allows large-scale continuous production and is safe and environmentally-friendly. The present disclosure also provides a TPE physically-foamed roll prepared by the preparation method, and the TPE physically-foamed roll has a thickness of 0.1 mm to 3 mm, a density of 0.1 g/cm3 to 0.6 g/cm3, a foam cell size of 1 ?m to 200 ?m, and a Shore hardness of 20 C to 60 C.

Abstract: Disclosed is a low-temperature supercritical foaming process, comprising the following steps: (1) bringing a polyolefin material or a thermoplastic elastomer material into contact with at least one inert gas in a reactor at a pressure higher than atmospheric pressure to drive the gas into the material, the pressure holding temperature of the polyolefin material or thermoplastic elastomer material being lower than the melting temperature of the material by 5-40° C.; (2) reducing the pressure to expand the material so as to produce a primary foamed material, and taking out the primary foamed material; and (3) taking out the primary foamed material and putting same into a tunnel furnace for secondary foaming, the temperature of the tunnel furnace being higher than the melting temperature of the material. Compared with the prior art, the present invention features high production efficiency, energy saving, and improvement of the reactor utilization rate.

Abstract: Disclosed are a colored TPU foam material, a preparation method and a use thereof, as we as a method for preparing a shaped body, a sheet and a shoe material by using same. The colored TPU foam material is composed of colored foam particles or colored foam sheets; the concentration of a pigment in the colored foam particles or the colored foam sheets is 0.01-5 wt %; the pigment has the same concentration inside and outside the colored TPU foam material, and the colored TPU foam material has a hardness of shore A 5-65, a density of 0.05-0.5 g/cm3, and an average cell size of less than 100 ?m. The present invention has features such as a good internal and external color uniformity, no wrinkles being present on the surface, etc.

Abstract: Disclosed are a coloured TPU foam material, a preparation method and a use thereof, as we as a method for preparing a shaped body, a sheet and a shoe material by using same. The coloured TPU foam material is composed of coloured foam particles or coloured foam sheets; the concentration of a pigment in the coloured foam particles or the coloured foam sheets is 0.01-5 wt %; the pigment has the same concentration inside and outside the coloured TPU foam material, and the coloured TPU foam material has a hardness of shore A 5-65, a density of 0.05-0.5 g/cm3, and an average cell size of less than 100 ?m. The present invention has features such as a good internal and external colour uniformity, no wrinkles being present on the surface, etc.