The Development of The Development of “DELTA®”, A Well-“DELTA®”, A Well-

balanced Knit balanced Knit MaterialMaterial　

Teijin Fiber Co., Ltd. Process Engineering

1. Backgrounds to the Development

スポーツ衣料市場の環境変化↓

｢質感 ・｣ ｢物性 ・｣ ｢機能性 の全ての面において｣高いレベルの商品が要求されている

↓高バランスニット素材 デルタ の開発｢ ｣

School/Baseball Uniforms

Athletics

Casual Knit

0

Changes in the sports wear market↓

Demand for a material with a high level of“texture”, “physical property”, and “functionality”

↓Development of Well-balanced Knit Material “Delta®”

“Texture”

“Physical Property”

“Functionality”

Well-balanced Knit Material “DELTA®”

3. Outlines of DELTA® Technology

(1) Problems in current products --- ” ill-balanced knit ”

Surface

現状は、 仮撚糸を使ﾎﾟﾘｴｽﾃﾙ用している商品が多い

↓仮撚糸が持っている“ねじれ”特性によってループに

‘ひずみ’が生じる

Section

Distorted loops

Rough surface(not flat)

Loops lacking roundnessLarge gaps between loops

Many current products use polyester false-twist yarns↓

Loops become distorted because of “twisting” of false-twist yarns

Surface Section

DELTA®

Conventional materials

(2) Gaps between loops

Large

Small

(1) Surface

Flat

Rough

(3) Roundness of loops

Round

Flattened

(4) Loop distortion

Distorted

No distortion

Remove distortions in the loops　(Balancing the knit fabric)

DELTA® Conventional Products

Surface Appearance

Bulkiness

Weight ｇ /㎡ 138 135

Thickness mm

0.71 0.60

2. Product Features of DELTA®

1) Anti-snagging property

[1] What is snagging?

[2] How it happens?

<1st stage> <2nd stage> <3rd stage>

Typical snagging

(1) Physical Properties

A defect that is made when the material is caught by a sharp projection

[3] Comparisons between Conventional Technologies and DELTA®

ItemsConventional Technologies

DELTA®

(1) Minimizing the length of exposed yarn

(2) Reduction of gaps between loops

(3) Increasing the binding force of knit fabric

a a’

Twisted yarn, air twined yarn

Increase the density of knit fabric

Bond the surface with resin

The ultimate flatness of the surface maintains superior physical properties with low binding force.

Minimum length of exposition

Minimum gaps between loops

DELTA® Conventional Material

15 hours

30 hours

* Measurement Method: JIS L1076 Snagging D3 (Metal saw method)

Anti-snagging property improved while maintaining other properties of knit material

Anti-snagging property improved while maintaining other properties of knit material

[4] Comparisons by Measurement

Class 4-5

Class 4 Class 2-3

Class 3

2) Runproof

A loop is pulled out by a force applied to this part

0

10

20

30

40

50

DELTA® Conventional material

10

45

[1] The mechanism of running

To prevent this, increase the frictional coefficient between loops

　　　　　　　　　　　　↓

Yarns forming rounded loops are effective

[2] Data on actual running

Round loops

(Teijin test method)

(mm)

Len

gth

of

run

nin

g

0

１ 0

20

30

40

50

(2) Functionalities 1) Stretching

[1] Comparison of stretching mechanism

the stretching property of knit material is provided by deformation of loops

DELTA® Conventional Material

The image of loop deformation

Since DELTA® is free of distorted loops, loops deform smoothly.↓

Easily stretchable to offer better comfort

Since DELTA® is free of distorted loops, loops deform smoothly.↓

Easily stretchable to offer better comfort

Round loops Distorted loops

Stretching Stress

(lengthwise)

Expansion (%)

DELTA®Conventional

material

Lengthwise:

42%

Crosswise:

125%

Lengthwise:

25%

Crosswise:

110%

Low stretching stress (especially lengthwise)

↓

Superb stretching property for comfortable and soft clothing

Excellent stretching property in both directions

タテ

[2] A Comparison of Stretching Characteristics

DELTA®

Conventional material

Expansion (%)

Load

(kg)

θθ

◆Sample knit fabric: 28G mesh, 54 courses/44 wales

4. Summary4. Summary

Classifications Product Features Technological Summary

Tex-ture

Appear-ance

- Classy appearance without glossiness and with dense texture and flat surface

1. Development of a special false-twist yarn　　　　　　　　　↓　　　　　 Low contortion

2. Optimization of knitting conditions optimization of knitting structure, knitting conditions, and mixing other yarn

3. Development of special dyeing technique (1) Low tension processing

(2) Maximization of beating effect

Feel - Soft and bulky

Physical Properties

- Anti-snagging

- Runproof

- Excellent structural stability

Functionalities

- Smooth stretching

- UV cut

- Non-transparency

OthersIt is possible to make special structures (Aqua Dry, Wind Barrier, etc.) with special yarns (Waveron, Pasmo, Eco-circle fiber, etc.) to develop a product for any situation.

* One patent