Thermoplastic polyurethane elastomer production device and method

Abstract

The invention discloses a thermoplastic polyurethane elastomer production device which comprises a twin-screw extruder, an in-water pelletizer, a dehydrator, a vibration screen, a packing machine and a material cabin, wherein the in-water pelletizer is connected to the rear end of the twin-screw extruder; the dehydrator is connected with the in-water pelletizer; the vibration screen is connected with the dehydrator; a discharging port is arranged at the lower part of the vibration screen; the packing machine is connected with the vibration screen; and the material cabin is connected with the packing machine. The thermoplastic polyurethane elastomer production device is characterized in that three liquid material tanks are directly connected to the front end of the twin-screw extruder; raw material measuring members are arranged at the upper parts of the liquid material tanks; and at least twelve raw material continuous reaction stations on which the liquid materials are sufficiently reacted are arranged at the front part of the twin-screw extruder. The ratio of raw materials of the device is controllable, the raw materials are sufficiently reacted, the working efficiency is high, the occupied space is small, and the environmental pollution is greatly reduced.

Description

technical field [0001] The invention relates to a polymer production device, in particular to a thermoplastic polyurethane elastomer (TPU) production device and method. Background technique [0002] TPU is a linear block copolymer composed of oligomer polyol soft segment and diisocyanate and chain extender hard segment. TPU is made of diphenylmethane diisocyanate (MDI) or toluene diisocyanate (TDI) and other diisocyanate molecules, macromolecular polyol (POLYOL), low molecular polyol (chain extender) in the filling machine and twin-screw extrusion It is a polymer material that is continuously and completely reacted and polymerized in the machine and granulated in water. It is characterized by repeated carbamate groups in its molecular composition, and it also contains other groups such as urea carbamate, biuret, and ester bonds and ether bonds. From the perspective of molecular structure, it is composed of rigid segments and flexible segments alternately, wherein the rigid...

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Problems solved by technology

Therefore, in the TPU production process, the ratio of raw material components, the uniformity of mixing, and the control of reaction temperature are all extremely important parts. However, the current TPU one-step granulation system has inaccurate manual ratio measurement of raw materials, There are problems such as uneven mixing and uncontrollable reaction temperature. On the one hand, the traditional two-step granulation system has the problems of long processing and high energy consumption due to the need for two-step manufacturing. On the other hand, high energy consumption has caused environmental pollution. Serious, high-cost problems. Therefore, in order to produce TPU products that meet market demand, it is urgent to develop a kind of raw material ratio accurate, uniform mixing, controllable reaction temperature and simple preparation process, low cost, low energy consumption, and reduce environmental pollution. Contaminated TPU one-step granulation system

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