Polyurethane foam composition containing TPU powder and manufacturing method of shoe insole using the same
AssigneesHeedae Park, Sam Bu Fine Chemicalco., Ltd.
InventorHeedae Park
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Abstract
The present invention relates to a polyurethane foam composition containing polyurethane powder and a method for manufacturing shoe insoles using the same. The polyurethane foam composition with Thermoplastic polyurethane (TPU) powder has an average particle size of 50 to 300 μm for an eco-friendly polyurethane (PU) foam composition made of water foam, and thus the polyurethane foam sheet formed therefrom is put into a mold and a Heat Press to form shoe insoles. The polyurethane foam composition containing TPU powder and a manufacturing method of footwear insole using the same are provided, which can reduce the overhead energy cost.
Claims6
A method of manufacturing a shoe insole, comprising:
- preparing a polyurethane block foam by reacting a polyurethane foam composition composed of polyol, isocyanate, chain extender, and water as a foaming agent as raw materials;
- adding 5-30 wt % of the thermoplastic polyurethane (TPU) powder with an average particle size of 50-300 micrometers based on the total weight of the polyurethane foam composition to the polyurethane block foam;
- forming a polyurethane foam sheet by cutting the polyurethane block foam to a predetermined thickness;
- bonding the polyurethane foam sheet cut to a predetermined thickness with a fabric;
- putting the polyurethane foam sheet bonded with the fabric into a mold and molding it for 40-60 seconds by a heat press at a temperature of 150 to 200° C. and a pressure of 40 to 60 kgf/cm 2 to process it into a shoe insole shape;
- and
- cutting the shoe insole shape.
The method of manufacturing a shoe insole, the TPU powder is used alone or in combination with any one selected from virgin TPU and recycled TPU.
Dependencies are inferred from the claim text.