Abstract: By taking three kinds of natural fiber fabrics as the research object, this paper conducted the conclusion that the material with a thickness of 70 μm has the best fusible performance. Compared with traditional seam joints, fusible process has better assist in seam strength and construction, and is resistant to acid and alkali washing. In order to optimize related process, the paper carried out a L9（34）orthogonal test on the factors that affect the seam strength, including fabric type, pressing pressure, pressing time, pressing temperature. Results showed that the process factors affecting seam strength are fabric type, pressing time, pressing pressure, and pressing temperature in order. When the pressing pressure is 5 kg, the pressing time is 7 s, and the pressing temperature is 140 ℃, fabric a is obtained the best fusible effect. The optimized parameters and process obtained from the experiment are stable and have good application prospects.

Key words: seamless shirt; natural fiber; fusion material; peel strength; breaking strength; fusible process