Fine Denier Polyolefin Chopped Fiber－Introduction to AIRYMOTM－

20170907

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Development of Fine Denier Polyolefin
Chopped Fiber （AIRYMOTM）
Since it is difficult to reduce the yarn size of the conjugate fiber, it was known
that 0.4 dtex is the lower limit of the yarn size of currently commerciallyavailable polyolefin conjugate fibers having the sheath and core structure.
As a result of developing original proprietary spinning and stretching technology,
UEXC succeeded in exceeding the limit and realized to produce fine polyolefin
conjugate fiber “AIRYMOTM " with yarn size of 0.3 dtex or less.
"AIRYMOTM" is attracting attention as chopped fiber that can contribute to anincrease in added value of fibers by imparting excellent functionality tononwoven fabrics.
Currently it is a development item, but UEXC assume the following applications;・Industrial materials: battery materials, various filters, base materials for tapes,etc.
・Medical / sanitary materials: pads, substrates, etc.
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【Contents】¾ ①Introduction to fine denier polyolefin
chopped fiber（AIRYMOTM ）¾ ② Introduction to nonwoven fabricmade of AIRYMOTM

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①Characteristics of Fine Denier Polyolefin Chopped
Unit of yarn size：dtex（decitex）
Fiber（AIRYMOTM）
Ｔ：Short name of dtex
（Weight per 10,000 m（ｇ））••••

Produced by proprietary manufacturing method suitable for achieving fine denier
Fine yarn size is possible up to 0.2 T (0.1 T is under development).
Excellent Uniformity of the fiber（having less cross-sectional plaques andunevenness of size)
Extremely small fluctuation in yarn size (eg 0.2 ± 0.02 T).

※ Small size-range standard of 0.2 ± 0.02 T is possible, compared to conventionalsize-range standard of 2.2 ± 0.2 T

Photograph of fiber cross section

SEM photograph of nonwoven
fabric surface

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①Definition of Fine Denier Polyolefin chopped Fiber（AIRYMOTM）

Unit of yarn size：dtex（decitex）
Ｔ：Short name of dtex
（Weight per 10,000 m（ｇ））

Material composition PE/PP Single（Grade name）
PPCoPP/PP

Yarn size（Product）

RC（Conventional chops）

RCERCP

RCC

More than 1.7T
（1.7、2.2、3.3）

SC（SIMTEXTM chops）

SCESCP

SCC

More than 0.4T（0.4、0.8、1.3、1.7）

QCE

QCP

QCC

Less than 0.3T
（0.1、0.2、0.3）

High strength fiber

QC（Fine denier chops）

AIRYMOTM

RCSC（Underdevelopment）（Underdevelopment）

QC

Yarn size
Diameter
Schematic diagram

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①Variety of Fine Denier Polyolefin Chopped Fiber（AIRYMO ）TMBrand【Variety】

Resin【Composition】

QCE

Yarn size
range【dTex】

Filament
DiameterCut length【ｍｍ】

PE/PP(50/50) conjugated fiber

0.2〜0.3

5.2〜6.5

2、3、5QCESPE/PP(＜PE40%) conjugated fiber

0.2〜0.3

5.2〜6.5

2、3、5QCELPE/PP(＞PE60%) conjugated fiber

0.2〜0.3

5.2〜6.5

2、3、5QCP

PP(100％) single fiber

0.2〜0.3

5.2〜6.5

2、3、5QCC

CoPP/PP conjugated fiber【μm】

Under development※ 0.1 dtex is under development. Cut lengths of 2, 3, 4, 5, 6, 8, 9, 10 mm are possible
Sheath core ratio
Name of variety
Imagediagram

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①Characteristics Use of Varieties of Fine Denier Polyolefin

Chopped Fiber（AIRYMOTM）
Sheath core ratio
Name of variety
Imagediagram・QCEL：Easy reduction of fabric thickness which is suitable for film formation
・QCES：Resistance to decrease fabric thickness which ensure void formation
Schematic diagram of intersection bonding

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②Characteristics of Nonwoven Fabric Made of AIRYMO

TM①Since AIRYMOTM uses an oil agent according to the prescription of nonwoven
fabric manufacturers, it has excellent dispersibility and enables the productionof uniform nonwoven fabrics.
②Desired void size and porosity are obtained by mixing various chopped fibers,
e.g. QCE and QCES, as shown in the following SEM photograph.
③The nonwoven fabric having a high weight per unit area exhibits extremely
high strength by using fine denier chopped fiber,④It is possible to produce a nonwoven fabric having a low weight per unit area
suitable for a thin film by using fine denier chopped fiber,⑤AIRYMOTM is not water absorbent and has excellent chemical resistance
QCE=100% Nonwoven fabric

QCE/QCES=50/50 Nonwoven fabric

Very easy to film formation

Increase of opening ratio
by little coarse-to-fine

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②Specification of AIRYMOTM Nonwoven FabricWeight perunit area
【g/㎡】

Thickness【μm】

Bulk Density【g/cm3】Stress at
maximum point【MPa】
MD / CDElongation at
maximum point【％】
MD / CD

3〜60

9〜200

0.2〜0.4

More than 25 / 15

Less than 20 / 25

It is possible to produce nonwoven fabric with excellent mechanical properties,
i.e. high strength and high elongation.
※ It is also possible to perform press-forming as secondary processing.

◆SEM photograph of nonwoven fabric surface＜e.g.：Item with high weight per unit area＞＜e.g.：Item with low weight per unit area＞
Weight per unit area of 3g/m2 thickness of 9 μm Weight per unit area of 45 g/m2 thickness of 150 μm

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② Example of Physical Properties Table of AIRYMOTM Nonwoven Fabrics
Elongation atmaximumpoint 【%】MD CDThickne
ss【μm】

Bulkdensity

A3

100.31411218

B

1350

0.26

22112124C

23

70

0.33

34

23

1821D

30

900.335235

202129.3

110

0.27

30

172525

SampleMaterial
underdevelopment

Strength【N / 15mm】

Weight perunit area
【g/ｍ2】

Conventionalmaterial【g/cm3】MDCD※ Data are not guaranteed value but measured value.

It is possible to produce nonwoven fabric with micron level thickness.
¾ The developed product has a maximum strength of 1.5 times or more, whencomparing the sample having a weight per unit area / thickness close toconventional products.

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