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

1 . 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 (d 1 ) and releasing the strand 5 seconds later,

a specific volume ratio (SVD 0 ) of the strand before the rapid tension application, represented by Equation (2), i.e., a ratio of a real density (RD) to bulk density (BD 0 ), is in a range of 2 to 30:

SVD 0 =RD/BD 0 =BV 0 /RV  (2)

wherein, in Equation (2), a real density (RD) of the strand is a density of the individual filaments, the bulk density (BD 0 ) of the strand is a density according to a bulk volume (BV 0 ) 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 (d 0 ), wherein a converted diameter of the strand is R 0 , and a bulk volume of the strand is BV 0 ,

wherein the strand is characterized in that:

when the strand undergoes the rapid tension application, the strand has an increase ratio of SVD (SVD ratio ) in a range of 1.5 to 8 as represented by Equation (3):

SVD ratio =SVD 2 /SVD 0 =BV 2 /BV 0   (3)

where:

(i) the tensile length (d 1 ) 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) SVD 2 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 BV 2 is a bulk volume of the strand at an extended length (d 2 ) after the rapid tension application.

2 . The compression-type strand of claim 1 , wherein

after performing the rapid tension application (PO) to the strand, an increase ratio of area (S ratio ) of a vertical cross-section of the strand, represented by Equation (4), is 1.5 times to 7 times:

S ratio =S 2 /S 0   (4)

wherein, in Equation (4), S 0 and S 2 respectively represent cross-sectional areas of the strand before and after the rapid tension application (PO).

3 . The compression-type strand of claim 1 , wherein after the rapid tension application (PO), the cross-section of the strand is extended while maintaining a shape before the rapid tension application (PO).

4 . The compression-type strand of claim 1 , wherein

the strand comprises macro-wave textures, and

after the rapid tension application (PO), the macro-wave textures of the strand are extended while maintaining a shape before the rapid tension application (PO).

5 . The compression-type strand of claim 1 , wherein

a shape strain rate of the strand after the rapid tension application (PO), which is represented by Equation (8), is less than 10%:

Shape strain rate=( L 2 −L 1 )/ L 2 ×100  (8)

wherein, in Equation (8), after the rapid tension application (PO), L 1 represents a length of the strand immediately after the strand is vertically hung under a condition of 40° C. and an RH of 60% and is 24 inches, and after the rapid tension application (PO), L 2 represents a length of the strand after vertically hanging the strand of a length (L 1 ) of 24 inches under a condition of 40° C. and an RH of 60% for 24 hours.

6 . The compression-type strand of claim 5 , wherein

the filaments of the strand each have a thickness in a range of 30 denier to 150 denier,

a flexural strength of the polymer constituting the filaments is in a range of 300 kgf/cm 2 to 1,300 kgf/cm 2 , and a flexural modulus of the polymer constituting the filaments (based on ASTM D790) is in a range of 13,000 kgf/cm 2 to 36,000 kgf/cm 2 .

7 . The compression-type strand of claim 5 , wherein

the filaments of the strand each have a thickness in a range of 30 denier to 150 denier,

a flexural strength of the polymer constituting the filaments is in a range of 600 kgf/cm 2 to 1,200 kgf/cm 2 , and a flexural modulus of the polymer constituting the filaments (based on ASTM D790) is in a range of 20,000 kgf/cm 2 to 35,000 kgf/cm 2 .

8 . The compression-type strand of claim 1 , wherein

the strand is a LOC braid type,

SVD before the rapid tension application (PO) is in a range of 3 to 15, and

an increase ratio of SVD (SVD ratio ) due to the rapid tension application (PO) is in a range of 1.5 to 6.

9 . The compression-type strand of claim 1 , wherein

the strand is a LOC braid type,

a change to a Marley braid type may occur due to the rapid tension application (PO), wherein macro-wave textures and micro-flexural textures are simultaneously expressed in the Marley braid type,

SVD before the rapid tension application (PO) is in a range of 5 to 20, and

an increase ratio of SVD (SVD ratio ) due to the rapid tension application (PO) is in a range of 2 to 8.

10 . The compression-type strand of claim 1 , wherein

the strand is a curly braid type,

SVD before the rapid tension application (PO) is in a range of 10 to 30, and

an increase ratio of SVD (SVD ratio ) due to the rapid tension application (PO) is in a range of 2 to 8.

11 . The compression-type strand of claim 1 , wherein

the strand is a twist braid (cross twisted filament-bundle) type,

SVD before the rapid tension application (PO) is in a range of 2 to 10, and

an increase ratio of SVD (SVD ratio ) due to the rapid tension application (PO) is in a range of 1.5 to 4.

12 . The compression-type strand of claim 1 , wherein

the strand is a box braid (braided filament-bundle) type,

SVD before the rapid tension application (PO) is in a range of 2 to 10, and

an increase ratio of SVD (SVD ratio ) due to the rapid tension application (PO) is in a range of 1.5 to 4.

13 . The compression-type strand of claim 1 , wherein

the strand comprises one or more of a rotational-twisted or spiral-twisted filament-bundle, the strand is a textured compressed high-density (closely contacted) compression-type strand of TM braid type by grouping a plurality of TM bundles, the strand is separated into as many as a number of rotiational-twisted or spiral-twisted bundles, and SVD of each separated bundle before the rapid tension application (PO) is in a range of 3 to 10, and

an increase ratio of SVD (SVDratio) of each of the rotational-twisted or spiral-twisted bundles after the rapid tension application (PO) is extended to 1.5 to 6, and each of the rotational-twisted or spiral-twisted bundles is converted into a lightweight distorted LOC braid in which irregular waves are expressed.

14 . The compression-type strand of claim 1 , wherein

the strand exhibits outward curls, and

the outward curls are formed in one of an S direction (right) and a Z direction (left).

15 . The compression-type strand of claim 1 , wherein

the strand exhibits outward curls, and

an S direction (right) and a Z direction (left) alternately appear in the outward curls.

16 . The compression-type strand of claim 1 , wherein the length of the strand is 2 meters (m) or longer.

17 . A method of preparing a compression-type strand of textured filament for wigs according to claim 1 , the method comprising:

supplying a plurality of wig filaments for use in wigs;

texturing the filaments;

compressing and accumulating the textured filaments; and

cooling the compressed and accumulated filaments.

18 . A method of converting a compression-type strand of textured filament for wigs, wherein the compression-type strand prepared according to claim 17 has an increase ratio of SVD (SVD ratio ) of the strand in a range of 1.5 to 8 by applying rapid tension (PO).