| 摘要 |
PROBLEM TO BE SOLVED: To drastically improve productivity by sewing a covered electric heating wire with a sewing machine on a composite sheet, formed by stacking a high heat conductive metal foil and a soft plastic film on a soft plastic woven fabric. SOLUTION: This sheet heater 1 has a composite sheet 1, on which a covered electric heating wire 2 is arranged and the covered electric heating wire 2 sewn on the composite sheet 1 in a specified pattern with a sewing machine. The composite sheet 1 is constituted with a soft plastic woven fabric, a high thermal conductivity metal foil, and a soft plastic film. The high heat conductive metal foil and the soft plastic film are stacked on the soft plastic woven fabric in the composite sheet 1. The covered electric heating wire 2 is sewn on the metal foil side in the composite sheet 1. By applying an automatic sewing machine capable of controlling a stitch in various patterns with a control circuit, the covered electric heating wire 2 can be wired in a specified pattern and with necessary fixing strength.
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