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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、 仮撚糸を使ポ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
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