Wound body and method for manufacturing wound body

Patent metadata

Field	Value
Publication number	US-11834294-B2
Application number	US-201917272889-A
Country	US
Kind code	B2
Filing date	Aug 30, 2019
Priority date	Sep 3, 2018
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

Provided is a wound body of a commingled yarn, the wound body being capable of effectively suppressing fraying and sagging, disorder of a lower layer, or breakage of the commingled yarn during winding or use. Also provided is a method for manufacturing the wound body. The wound body contains a core member and a commingled yarn traversely wound onto the core member; wherein the commingled yarn is traversely wound onto the core member in two or more directions; and when the wound body is placed on a white substrate in a light-shielded space such that a cylindrical direction of the core member is upright, and light is irradiated toward a plane that includes a center axis of the cylinder, from a point that is moved a distance of a radius of the core member plus 180 cm in a direction perpendicular to the center axis from an intersection point between the center axis of the core member and the white substrate on a surface of the white substrate, and is further moved 210 cm in a direction perpendicular to the substrate face of the white substrate, linear reflection lines of a quantity equivalent to the number of directions of the traverse winding are formed on a surface of the traversely wound commingled yarn.

First claim

The invention claimed is:

1. A wound body comprising a core member and a commingled yarn traversely wound onto the core member; wherein
the commingled yarn is traversely wound such that a gap is present between the commingled yarn and a closest commingled yarn traversely wound in the same direction;
the commingled yarn is constituted from continuous reinforcing fibers and continuous thermoplastic resin fibers;
a dispersion degree of the continuous reinforcing fibers in the continuous thermoplastic resin fibers is 90% or more;
an impregnation rate of the continuous thermoplastic resin fibers in the continuous reinforcing fibers is 5% or less;
the commingled yarn is traversely wound in two to four directions;
the commingled yarn is traversely wound in at least a direction from 3 to 25° and a direction from −3 to −25°, with respect to a straight line orthogonal to a center axis of the core member;
a ratio of a moved distance/width of commingled yarn, which is a ratio of a distance at which the commingled yarn is moved with regard to a central portion in the center axis direction of the core member when the commingled yarn has been traversely wound one turn around the core member, to a width of the commingled yarn, is from 2.0 to 12.0;
the commingled yarn is non-twisted and in a tape shape with a width from 7 to 20 mm;
a ratio of a width of traverse winding/width of commingled yarn, which is a ratio of a width at which the commingled yarn is wound onto the core member to a width of the commingled yarn, is from 15 to 40; and
a diameter of the core member is from 5 to 20 cm;
where the dispersion degree is defined as a value that is obtained by embedding the commingled yarn in an epoxy resin, grinding a cross section perpendicular to a longitudinal direction of the embedded commingled yarn, photographing a cross-sectional view using an ultra-deep color 3D shape measuring microscope, drawing six equidistantly spaced auxiliary lines in a radial shape in the captured image, measuring lengths of continuous reinforcing fiber regions on each of the auxiliary lines as a1, a2, a3, . . . ai (i=n), measuring lengths of continuous thermoplastic resin fiber regions on each of auxiliary lines as b1, b2, b3, . . . bi (i=m), and then calculating the dispersion degree from the following equation:

[

1
-

(

1

n
⁢

⁢
or
⁢

⁢
m

×

∑

i
=
1

n
⁢

⁢
or
⁢

⁢
m

⁢

(

a
i

⁢

⁢
or
⁢

⁢

b
i

)

∑

i
=
1

n
⁢

⁢
or
⁢

⁢
m

⁢

(

a
i

)

+

∑

i
=
1

n
⁢

⁢
or
⁢

⁢
m

⁢

(

b
i

)

)

]

×
100
⁢

⁢

(
%
)

;

and the impregnation rate is defined as a ratio a

Assignees

• Mitsubishi Gas Chemical Co

Inventors

• Nakai Asami
• Kaji Masataka
• Takagi Mitsuro
• Motochika Toshihiro
• Matsumoto Nobuhiko

Classifications

• B65H55/04 Primary

  characterised by method of winding · CPC title

• B65H2701/313

  Synthetic polymer threads · CPC title

• B65H2701/37

  Tapes · CPC title

• B65H2701/31

  Textiles threads or artificial strands of filaments · CPC title