| 摘要 |
PROBLEM TO BE SOLVED: To provide dental floss which shows excellent flossing effects and gives excellent use feeling. SOLUTION: A dental floss yarn includes split fiber which has single yarn fineness of 2 dtex or less and is formed by splitting composite fiber multi-filaments, made of at least two kinds of fiber forming polymers with different official moisture regains, by stress, and at least a part of a segment, constituting the split fiber, has an atypical shape of the fiber cross-section having edges. The dental floss yarn comprises the composite fiber multi-filaments having the shape of the fiber cross-section of a radial shape segment A and complementary segments B for complementing the radial shape segment. COPYRIGHT: (C)2007,JPO&INPIT
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