Hair holder, method for manufacturing hair holder, and hair treatment method using hair holder

Abstract

A hair holder (1) includes a tubular body (2) constructed in such a manner that a hair bundle (H) is insertable from an opening (1a) at one end toward an opening (1b) at the other end. The hair holder (1) has a longitudinal direction (X) and a width direction (Y). The hair holder (1) is constructed in such a manner that the hair holder can be rolled up along the longitudinal direction (X). The hair holder (1) includes a first sheet (21) to be located on an inner side in the rolled-up state, and a second sheet (22) to be located on an outer side. One or both of the two sheets (21, 22) satisfies at least one of condition (1) or (2) below: (1) the sheet includes a polyester-based nonwoven fabric, and the sheet’s storage modulus E′ in dynamic viscoelasticity measured at 100° C. at a frequency of 1 Hz is 50 MPa or greater; or (2) the sheet includes a polyester-based nonwoven fabric, and the sheet’s storage modulus E′ in dynamic viscoelasticity measured at 150° C. at a frequency of 1 Hz is 19.2 MPa or greater.

1 . A hair holder comprising a tubular body wherein:
 the tubular body has a first opening located at one end and a second opening located at the other end;   the tubular body is constructed in such a manner that a hair bundle is insertable from the first opening toward the second opening;   the hair holder has a longitudinal direction and a width direction orthogonal to the longitudinal direction;   the hair holder is constructed in such a manner that the hair holder can be rolled up along the longitudinal direction;   the hair holder comprises
 a first sheet to be located on an inner side in a state where the hair holder is rolled up, and 
 a second sheet to be located on an outer side in a state where the hair holder is rolled up; and 
 one or both of the first sheet and the second sheet satisfies at least one of condition (1) or (2) below: 
   (1) the sheet includes a polyester-based nonwoven fabric, and the sheet’s storage modulus E′ in dynamic viscoelasticity measured at 100° C. at a frequency of 1 Hz is 50 MPa or greater;   (2) the sheet includes a polyester-based nonwoven fabric, and the sheet’s storage modulus E′ in dynamic viscoelasticity measured at 150° C. at a frequency of 1 Hz is 20 MPa or greater.   
     
     
         2 . The hair holder according to  claim 1 , wherein one or both of the first sheet and the second sheet satisfies the condition (1) and the condition (2). 
     
     
         3 . The hair holder according to  claim 1  , wherein the storage modulus E′ in dynamic viscoelasticity measured at 100° C. at a frequency of 1 Hz is 64.9 MPa or greater. 
     
     
         4 . The hair holder according to  claim 1 , wherein the storage modulus E′ in dynamic viscoelasticity measured at 100° C. at a frequency of 1 Hz is 200 MPa or less. 
     
     
         5 . The hair holder according to  claim 1 , wherein the storage modulus E′ in dynamic viscoelasticity measured at 150° C. at a frequency of 1 Hz is 20.3 MPa or greater. 
     
     
         6 . The hair holder according to  claim 1 , wherein the storage modulus E′ in dynamic viscoelasticity measured at 150° C. at a frequency of 1 Hz is 80 MPa or less. 
     
     
         7 . The hair holder according to  claim 1 , wherein, in the one or both of the first sheet and the second sheet, no exothermic peak in differential scanning calorimetry is observed within a range from 125° C. to 170° C. 
     
     
         8 . The hair holder according to  claim 1 , wherein, in the one or both of the first sheet and the second sheet, an endothermic peak in differential scanning calorimetry is observed within a range from 100° C. to 220° C. 
     
     
         9 .  The hair holder according to  claim 1 , wherein the polyester-based nonwoven fabric includes a fiber containing polyethylene terephthalate. 
     
     
         10 . The hair holder according to  claim 9 , wherein the fiber containing polyethylene terephthalate includes an amorphous portion. 
     
     
         11 . The hair holder according to  claim 1 , wherein the polyester-based nonwoven fabric is a spunbonded nonwoven fabric. 
     
     
         12 . The hair holder according to  claim 1 , wherein the polyester-based nonwoven fabric has a basis weight of from 50 to 300 g/m 2 . 
     
     
         13 . The hair holder according to  claim 1 , wherein a ratio of change in outer diameter is 26.9% or smaller, and 
 the ratio of change in outer diameter is measured by rolling the hair holder up so that its outer diameter is 26 mm and applying heat of 140° C. for 15 minutes to the hair holder in the rolled-up state.   
     
     
         14 . A method for manufacturing a hair holder including a tubular body wherein:
 the tubular body is constructed in such a manner that a hair bundle is insertable from an opening located at one end toward an opening located at the other end and which is in a rolled-up state;   the hair holder includes a first sheet located on an inner side in the rolled-up state and a second sheet located on an outer side;   one or both of the first sheet and the second sheet is made from a polyester-based nonwoven fabric; and   the method comprises
 a roll-up step of rolling up the hair holders and 
 a heating step of applying heat of 120° C. or higher while retaining the rolled-up state of the hair holder. 
   
     
     
         15 . A method for manufacturing the hair holder according to  claim 1 , comprising:
 a roll-up step of rolling up the hair holder; and   a heating step of applying heat of 120° C. or higher while retaining the rolled-up state of the hair holder.   
     
     
         16 . The method for manufacturing a hair holder according to  claim 14 , wherein, in the heating step, heat of 140° C. or higher is applied. 
     
     
         17 . The method for manufacturing a hair holder according to  claim  14 , wherein, in the heating step, heat of 300° C. or lower is applied. 
     
     
         18 . The method for manufacturing a hair holder according to  claim 14 , wherein the polyester-based nonwoven fabric includes a fiber containing polyethylene terephthalate. 
     
     
         19 . A method for treating hair employing the hair holder according to  claim 1 , comprising:
 inserting a hair bundle into the hair holder;   rolling up the hair holder; and   heating the hair bundle to 80° C. or higher while retaining the rolled-up state of the hair holder.   
     
     
         20 . The method for treating hair according to  claim 19 , wherein the heating is performed in a state where a permanent waving agent is applied to the hair bundle. 
     
     
         21 - 30 . (canceled)