The production process of thermal insoles mainly includes the following steps:
Material preparation: Select suitable thermal insulation materials, such as polyurethane (PU) foam or EVA material. These materials have good air permeability and resilience, and can provide good thermal insulation.
Cutting and baking: Cut the selected materials into sizes suitable for the size of the insole mold. For EVA materials, they need to be baked in an oven at a temperature of 150-190℃ until the material softens and matures.
Molding: Put the softened material into the mold and mold it by pressurizing and cooling. The molding mold is usually hollow, and the mold temperature is controlled between 15-20℃ by cooling water to ensure that the material shrinks and pressurizes in the mold to form the shape of the insole.
Trimming and cutting: Trim or cut the pressed insole to ensure that its edges are flat and meet the final shape and size of the insole.
Post-treatment: Perform necessary post-treatment on the molded insoles, such as antibacterial and deodorizing treatment, to improve their service life and comfort. For example, use antibacterial agents to treat the surface of the insoles to prevent bacteria from growing and keep the insoles clean and hygienic.
Through the above steps, insoles with good warmth retention, breathability and comfort can be produced.
