How does seam welding create nearly jointless vinyl sheet flooring?

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floor covering Axminster carpet, late 18th or early 19th century.

Seam welding is a technique used with vinyl sheet flooring to create a nearly jointless surface. By fusing the edges of adjacent sheets together, the process eliminates the visible gaps typically found between individual pieces of flooring. This method ensures a continuous, hygienic, and aesthetically seamless finish across the floor, which is particularly beneficial in environments where moisture resistance and ease of cleaning are essential.1