| 摘要 |
A novel conjugate fiber with a fine and an optical interference color-generating function, suitable for application in product fields which require aesthetic qualities, the fiber being characterized by having a structure wherein an alkali-soluble polymer with a thickness of 2.0 mum or greater surrounds an alternating laminated section with a thickness of no greater than 10 mum, comprising alkali-insoluble polymer layers with different refractive indices alternately laminated parallel to the long axis direction of the flat cross-section, wherein the ratio (SP 1 /SP 2 ) between the solubility parameter value of the higher refractive index polymer (SP 1 ) and the solubility parameter value of the lower refractive index polymer (SP 2 ) is in the range of 0.8-1.1.
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