Environment-friendly, energy-saving and carbon-reducing TPU molding method and device thereof

Abstract

The invention relates to an environment-friendly, energy-saving and carbon-reducing molding method of TPU and a device thereof, comprising: a material preparation step, a primary mixing step, a kneading reaction step, a pressurized injection molding step, and a cooling and demoulding step. In the present invention, the isocyanate polymer containing isocyanate group, the hydroxyl compound containing hydroxyl group and the chain extender are first mixed to form a mixture, and then the mixture is kneaded to react to form a TPU, and then the mixture is kneaded to form the TPU. In the process of TPU, the characteristics of heating and melting, directly pressurize the TPU to form a TPU finished product, thereby, the present invention can complete the manufacture of TPU through a consistent production process, which is different from the known prior manufacturing. Compared with the process of pelletizing and injection molding, the energy consumption of granulating and heating and melting masterbatch can be omitted, so as to achieve environmental protection, energy saving, carbon reduction and other effects.

Description

technical field [0001] The present invention relates to a TPU molding method and its device, in particular to an environmental-friendly, energy-saving and carbon-reducing TPU molding method and its device. Background technique [0002] The existing TPU (thermoplastic polyurethane elastomer rubber) molding method is mostly to mix an isocyanate polymer containing NCO (isocyanate group) and a hydroxyl compound containing OH (hydroxyl) to form a TPU, and then send it into the manufacturing process. Granulate in the granulator to form a masterbatch, then send the masterbatch to the downstream injection molding factory, let the injection molding factory heat and melt the masterbatch, and then send it to an injection molding machine for pressurized injection molding, To complete a TPU finished product. [0003] The above-mentioned TPU molding method, granulation and heating and melting of the masterbatch all need to consume a lot of energy. According to actual experience, the ener...

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Problems solved by technology

[0003] The above-mentioned TPU molding method, granulation and heating and melting masterbatches all need to consume a lot of energy. According to actual experience, the energy consumed by granulation is about 600KW, and the energy consumed by heating and melting masterbatch is about 60 to 200KW. The energy is extremely large, which not only cannot meet the requirements of environmental protection, energy saving, and carbon reduction required by modern society, but also greatly increases the production cost in the era of rising oil and electricity. In addition, because the hardness requirements of each TPU product are different, the above TPU The molding method requires the use of masterbatches with different hardness for hardness allocation, resulting in the user having to keep a variety of masterbatches with different hardness, which will only increase the inconvenience for users to prepare materials

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