Compression-type textured strand for wig and method for manufacturing same

A compression-type strand of textured filament for wigs,

• wherein the strand comprises at least one of macro-curl textures, macro-wave textures, and micro-flexural textures,
• in a cross-section of the strand comprising a sheath and a core, there are in a range of 30 to 4,000 filaments from the core to the sheath of the strand,
• the filaments comprise at least one of an amorphous organic polymer, a semicrystalline organic polymer, or an alloy thereof,
• the filaments each have a thickness in a range of 20 denier to 180 denier,
• the cross-section of the strand has a circular shape, an elliptical shape, a polygonal shape, or a combined shape thereof, and when a cross-sectional area is converted into an area of a circular shape, a converted diameter (R), i.e., a diameter of the circular shape, is in a range of 0.2 centimeters (cm) to 3.0 cm,
• a specific volume ratio (SVD) of the strand is represented by Equation (1):
• SVD=RD/BD=BV/RV (1)
• wherein, in Equation (1), a real density (RD) of the strand is a density of one of the individual filaments, the bulk density (BD) of the strand is a density according to a bulk volume (BV) of the strand, and RV is a volume occupied by the filaments,
• a rapid tension application of the strand being defined as a pulling of the strand at a speed of 150 mm/sec to a tensile length (d1) and releasing the strand 5 seconds later,
• a specific volume ratio (SVD0) of the strand before the rapid tension application, represented by Equation (2), i.e., a ratio of a real density (RD) to bulk density (BD0), is in a range of 2 to 30:
• SVD0=RD/BD0=BV0/RV (2)
• wherein, in Equation (2), a real density (RD) of the strand is a density of the individual filaments, the bulk density (BD0) of the strand is a density according to a bulk volume (BV0) of the strand before rapid tension application, and RV is a volume occupied by the filaments,
• a length of the strand before rapid tension application is defined as an initial length (d0), wherein a converted diameter of the strand is R0, and a bulk volume of the strand is BV0,
• wherein the strand is characterized in that:
• when the strand undergoes the rapid tension application, the strand has an increase ratio of SVD (SVDratio) in a range of 1.5 to 8 as represented by Equation (3):
• SVDratio=SVD2/SVD0=BV2/BV0 (3)
• where:
• (i) the tensile length (d1) is a length of the strand when a load weight equivalent to 500 times a weight of the strand is hung at an end of the strand in a length direction;
• (ii) an initial length (do) of the strand before the rapid tension application is 100 mm;
• and
• (iii) SVD2 is a specific volume ratio of the strand measured after the rapid tension application and after being left for one day under conditions of 40° C. and a relative humidity (RH) of 60%, and BV2 is a bulk volume of the strand at an extended length (d2) after the rapid tension application.