| 摘要 |
A hair winder spool containing a lossy dielectric material and a heat sink material is rapidly heated in a microwave oven to hair curling and drying temperatures which are maintained for a sufficient length of time to dry and curl hair wound around the spool. The spool is a hollow molded low loss dielectric plastics material spindle with hair retaining protruberances and radially projecting end flanges. The interior of the spindle is filled with a heat sink material having a melting point temperature within the range desired for drying and curling the hair wound around the spindle and also having a high heat of fusion. The lossy dielectric material may be in the form of a core in the cylinder surrounded by the heat sink material, a lining or coating on the cylinder wall surrounding the heat sink material or a matrix embedded in the plastics material. The lossy dielectric material absorbs microwave energy converting it into thermal energy and heats the spool to hair drying and curling temperatures when placed in a microwave field for a very short time. The hair winders are conveniently packaged in a casing which is relatively insensitive to microwaves to be comfortably handled when removed from a microwave oven after the winders are heated to operating temperatures.
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