Artificial hair fiber and hairpiece product
AssigneeDenki Kagaku Kogyo Kabushiki Kaisha
InventorAtsushi Horihata
Life of this patent
Estimating the term…
Abstract
An artificial hair fiber is provided that is easy to curl or set. An artificial hair fiber is usually formed and processed within a temperature range from 90 to 150° C. The artificial hair fiber has a storage elastic modulus E′ in the formation temperature range. A ratio (E′90/E′150) of a storage elastic modulus E′ at a temperature of 90° C. to a storage elastic modulus E′ at a temperature of 150° C. is 3 to 20. By this means, the artificial hair fiber can be well curled or transformed, maintaining a desired dynamic characteristic without being melted. The artificial hair fiber can be formed and processed into such a curled hair, so that it is possible to provide a hairpiece product that meets the fashion needs of users.
Claims12
An artificial hair fiber having a storage elastic modulus E′, wherein a ratio (E′90/E′150) of a storage elastic modulus E′ at a temperature of 90° C. to a storage elastic modulus E′ at a temperature of 150° C. is 3 to 20.
Dependencies are inferred from the claim text.