Hair weft and preparation process thereof

Abstract

A hair weft includes a first hair weft unit and a second weft unit, the first hair weft unit includes a first hair strand a hair transplantation base, wherein the first hair strand is fixed to the hair transplantation base, the second weft unit includes a second hair strand and an attaching base, wherein the second hair strand is fixed to the attaching base, wherein the attaching base is attached to the hair transplantation base.

What is claimed is: 
     
         1 . A first hair weft unit, comprising:
 a first hair strand, and   a hair transplantation base, wherein said first hair strand is fixed to said hair transplantation base.   
     
     
         2 . The first hair weft unit, as recited in  claim 1 , wherein said first hair strand comprises a first hair strand body and a first root portion integrally extended from said first hair strand body, wherein said first root portion is penetrating through said hair transplantation base and adhered to said hair transplantation base, wherein said first hair strand body and said first root portion are provided at two opposite sides of said hair transplantation base. 
     
     
         3 . The first hair weft unit, as recited in  claim 1 , wherein said hair transplantation base comprises a silk mesh and a glue layer applied on said silk mesh. 
     
     
         4 . The first hair weft unit, as recited in  claim 2 , wherein said hair transplantation base comprises a silk mesh and a glue layer applied on said silk mesh. 
     
     
         5 . The first hair weft unit, as recited in  claim 2 , wherein said first hair strand body of said first hair strand is extended from a front surface of said hair transplantation base, wherein said first root portion is adhered to a rear surface of said hair transplantation base. 
     
     
         6 . The first hair weft unit, as recited in  claim 4 , wherein said first hair strand body of said first hair strand is extended from a front surface of said hair transplantation base, wherein said first root portion is adhered to a rear surface of said hair transplantation base. 
     
     
         7 . The first hair weft unit, as recited in  claim 4 , wherein the first hair weft unit is prepared by allowing said first root portion of said first hair strand to penetrate through said silk mesh and then affixing said first root portion of said first hair strand to said silk mesh. 
     
     
         8 . The first hair weft unit, as recited in  claim 4 , wherein the first hair weft unit is prepared by placing said silk mesh and a spacer above said first hair strand, guiding an end of said first hair strand to pass through said silk mesh and the spacer, cutting a portion of said first hair strand between said silk mesh and the spacer to leave said first root portion of said first hair strand on said silk mesh, and affixing said first root portion of said first hair strand on said silk mesh. 
     
     
         9 . The first hair weft unit, as recited in  claim 4 , wherein the first root portion of the first hair strand on a rear side of the silk mesh base is 0.1 to 2 cm. 
     
     
         10 . The first hair weft unit, as recited in  claim 8 , wherein the root of the first hair strand on a back side of the mesh base is trimmed to 0.1 to 2 cm. 
     
     
         11 . The first hair weft unit, as recited in  claim 3 , wherein said glue layer comprise one or more of acrylic resin, epoxy resin and polyurethane. 
     
     
         12 . The first hair weft unit, as recited in  claim 4 , wherein said glue layer comprise one or more of acrylic resin, epoxy resin and polyurethane. 
     
     
         13 . The first hair weft unit, as recited in  claim 11 , wherein said glue layer further comprises phthalate and calcium carbonate. 
     
     
         14 . The first hair weft unit, as recited in  claim 12 , wherein said glue layer further comprises phthalate and calcium carbonate. 
     
     
         15 . The first hair weft unit, as recited in  claim 1 , wherein said first hair strand comprises a plurality of first hair element, wherein a top row of said first hair elements is extended from a top edge of said hair transplantation base and is naturally draping over said hair transplantation base in a curved manner. 
     
     
         16 . The first hair weft unit, as recited in  claim 2 , wherein said first hair strand comprises a plurality of first hair element, wherein a top row of said first hair elements is extended from a top edge of said hair transplantation base and is naturally draping over said hair transplantation base in a curved manner. 
     
     
         17 . The first hair weft unit, as recited in  claim 4 , wherein said first hair strand comprises a plurality of first hair element, wherein a top row of said first hair elements is extended from a top edge of said hair transplantation base and is naturally draping over said hair transplantation base in a curved manner. 
     
     
         18 . The first hair weft unit, as recited in  claim 1 , wherein said first hair weft unit is coupled to a second weft unit to form a hair weft, wherein said first hair strand comprises a plurality of first hair elements each having a first root portion fixing at a rear surface of said hair transplantation base and a first strand body extending out of said hair transplantation base at a front surface thereof, wherein the second weft unit comprises a second hair strand and an attaching base, wherein the second hair strand is fixed to the attaching base, wherein the attaching base is attached to said rear surface of said hair transplantation base so as to affix said first root portions of said first hair elements between said hair transplantation base and the attaching base, wherein the second hair strand comprises a plurality of second hair elements each having a second root portion affixing to the attaching base. 
     
     
         19 . The first hair weft unit, as recited in  claim 2 , wherein said first hair weft unit is coupled to a second weft unit to form a hair weft, wherein said first hair strand comprises a plurality of first hair elements each having said first root portion fixing at a rear surface of said hair transplantation base and said first strand body extending out of said hair transplantation base at a front surface thereof; wherein the second weft unit comprises a second hair strand and an attaching base, wherein the second hair strand is fixed to the attaching base, wherein the attaching base is attached to said rear surface of said hair transplantation base so as to affix said first root portions of said first hair elements between said hair transplantation base and the attaching base, wherein the second hair strand comprises a plurality of second hair elements each having a second root portion affixing to the attaching base. 
     
     
         20 . The first hair weft unit, as recited in  claim 4 , wherein said first hair weft unit is coupled to a second weft unit to form a hair weft, wherein said first hair strand comprises a plurality of first hair elements each having said first root portion fixing at a rear surface of said hair transplantation base and said first strand body extending out of said hair transplantation base at a front surface thereof; wherein the second weft unit comprises a second hair strand and an attaching base, wherein the second hair strand is fixed to the attaching base, wherein the attaching base is attached to said rear surface of said hair transplantation base so as to affix said first root portions of said first hair elements between said hair transplantation base and the attaching base, wherein the second hair strand comprises a plurality of second hair elements each having a second root portion affixing to the attaching base.