Environmentally-friendly energy-saving carbon reduction type TPU (thermoplastic polyurethane elastomer rubber) forming method and device

Abstract

The invention relates to an environmentally-friendly energy-saving carbon reduction type TPU (thermoplastic polyurethane elastomer rubber) forming method and a device, and the method includes a preparation step, a first mixing step, a kneading reaction step , a pressurized mould injection step and a cooling and demoulding step. According to the method, an isocyanate-group-containing isocyanate polymer, a hydroxyl-containing hydroxyl compound and a chain extender are firstly mixed together to form a mixture, then the mixture is kneaded for reaction to form TPU, according to the characteristics that the mixture may produce heat and melts in the process of the kneading reaction to form the TPU, the TPU is directly pressurized for mould injection to form a TPU finished product, thereby, through a consistent production process, the TPU manufacturing can be completed, and compared with a manufacture procedure of first granulation then injection molding, energy consumption of granulation and master batch heating and melting can be omitted, and the environmentally-friendly energy-saving carbon reduction effects can be achieved.

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 ene...

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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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