Method for Making Foamed Shoe Material
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United States of America Patent
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Issued Date -
Nov 2, 2023
app pub date -
Jul 11, 2023
filing date -
Aug 6, 2020
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Abstract
A method for making foamed shoe materials includes mixing r-PET and EVA with a compatibilizer for melt modification, a new polymer alloy is formed. The polymer alloy is then extruded into strips with an screw extruder under a temperature of 160° C. to 245° C. and an average shear rate of 100/sec to 300/sec, and at an extrusion rate of 100 kg/hr to 250 kg/hr. Simultaneously, the temperature of the screw in the extrusion process is controlled to rise from 160° C. to 245° C., then decrease to less than 240° C., so as to produce composite material masterbatches with good compatibility between recycled PET and EVA, which are used to produce foamed shoe materials, thus achieving the purpose of reusing recycled PET, reducing carbon emissions, and protecting the environment. Furthermore, it reduces the demand for fresh PET materials, thereby reducing the demand for petrochemical raw materials.
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