Polyimide Brief Introduction

Polyimide is a non-flammable fiber in atmospheric conditions. The LOl is above 38%. It is resistant to high and low temperatures and can be used for a long time below 300℃, with a thermal decomposition temperature of more than 567℃ and no brittle breakage in liquid nitrogen at -169℃.Polyimide fiber will carbonize without melt and drop in case of fire. The density of smoke is 1/200 of the airbus requirement. Products made of Polyimide fiber also have other excellent properties such as weather resistance,thermal insulation,chemical resistance, radiation resistance,UV resistance.


No

Item

Unit

Value

1

Fineness

dtex

0.8-6

2

Density

g/cm

1.41

3

Breaking strength

cN/dtex   

Nature clolor

>4.5   

Dope dyeing

>3.5   

4

Modulus

cN/dtex

36~43

5

Breaking elongation

%

10~30

6

Suggested long-term working temp    

260

7

Initialde composition temperature

(T5%(N2))

569

8

Limiting oxygen index(LOI)

%

38

9

Acid resistance

/

good

10

Radiation resistance

/

good


Polyimide Brief Introduction

Polyimide Brief Introduction

Polyimide Brief Introduction



Polyimide Fiber Products


Product

ProductID   

Specification

Colour

Staplefiber

Polyimide Fiber Products

 

BN0938

0.9dtex*38mm

goldenyellow

BN0951

0.9dtex*51mm

goldenyellow

BN1638

1.67dtex*38mm

goldenyellow,black

BN1651

1.67dtex*51mm

goldenyellow, orange,black,dark   

BN2238

2.2dtex*38mm

goldenyellow

BN2251

2.2dtex*51mm

goldenyellow

BN2265

2.2dtex*65mm

goldenyellow

BN2276

2.2dtex*76mm

goldenyellow

BN3351

3.3dtex*51mm

goldenyellow

BN3365

3.3dtex*65mm

goldenyellow

BN3376

3.3dtex*76mm

goldenyellow

BN6051

6.0dtex*51mm

goldenyellow

BN6062

6.0dtex*62mm

goldenyellow

BN6065

6.0dtex*65mm

goldenyellow

BN6076

6.0dtex*76mm

goldenyellow

BN1651

1.67dtex*51mm

faintyellow

BN2251

2.2dtex*51mm

faintyellow

Choopedfiber

Polyimide Fiber Products

 

BN0903

0.9dtex*3mm

goldenyellow

BN0912

0.9dtex*12mm

goldenyellow

BN1606

1.67dtex*6mm

goldenyellow

BN1612

1.67dtex*12mm

goldenyellow

BN2202

2.2dtex*2mm

goldenyellow

BN2203

2.2dtex*3mm

goldenyellow

BN2206

2.2dtex*6mm

goldenyellow

BN2250

2.2dtex*0.5mm

goldenyellow



Polyimide Performance Advantages


Flame retardant performance

The limiting oxygen index

The limiting oxygen index (LOI) refers to the minimum oxygen volume fraction required to maintain complete combustion in a mixture of oxygen and nitrogen. As a new generation of high performance fiber,Polyimide fiber has better flame retardant performance than traditional special fiber, with LOl up to 38%.

Common flame retardant fiber

Polyimide

PMIA

PPS

LOI (%)

>38

28~30

34


Low damaged length incombustion test

In vertical combustion test under Chinese fire protection criteria XF10-2014, the damaged length of Polyimide fabric is 1/5 of the aramid IIlA fabric (the mainstream FR fabric). The test result is far above the standard for protective fabric.

Damaged length(mm)

Polyimide

Aramid IIIA fabric

50%Polyimide

50%FR viscose

50% amaid

50%FR viscose

Standard

Flame retardant properties (25times Wash)

Warp

10

46

12

60

≤100

Weft

8

48

13

57


Smoke toxicity

Polyimide fiber will carbonize without melt and drop in case of fire.

FR fabric made of Polyimide fiber passed the combustion test based on BSS7238,7239. There is ultralow smoke and non-toxic after carbonization.

The density of smoke is1/200 ofABD0031 airbus requirement. According to the smoke density test method of building materials decomposition (GBT8627-2007),the smoke density grade(SDR) of pure Polyimide felt is only 0.12, far lower than the smoke density grade of current building insulation materials. 

Polyimide fiber is an wonderful material for confined space textiles, heat insulatin,home textile and protective products.

Polyimidefabrictoxiccomparison
ItemSmokedensity (Dm)Toxicgascontent (unit:ppm)
CO  HCNHFHCLSO2NOX
Polyimide1320.7<0.5<1<0.5<2
Airbusstandard2003500150100150100100


High Temperature Resistance


Polyimide Fibers High Temperature Resistance
The long-term service temperature of Polyimide fiber is up to 260~300℃. Initial decomposition starts from 567℃, As raw material of filter bag, the good dimensional stability and strength retention under high temperature provide higher filtration efficiency and service life.


Weather Resistance and Chemical Resistance

Polyimide fiber has excellent resistance to radiation, acid, alkali and thermal oxidation. It can keep outstanding mechanical property and chemical stability in the extreme environment such as space, sea, ice and desert.

Acid resistance

Radiation resistance

Polyimide Fibers Acid resistance

Polyimide Fibers Radiation resistance


Salt spray test

Using 100% polyimide yarn in accordance with GJB150A-2009 standard for neutral salt spray test.

Item

Unit

Initial State

After testing

Breaking strength

CN

21*10²

19*10²

Breaking elongation

%

16

15


Antibacterial Property


Antibacterial function

Polyimide fiber has natural antibacterial function. The antibacterial effect outperforms bamboo fiber.

Test Item

Strain

Standard

Result

Rate of Antibacteria

Staphylococcus Aureus

≥70

98%

Colibacillus

≥70

99%

Candida albicans

≥60

99%

 

Fungus test

According to GJB150.10A-2009 laboratory environmental test method of fungus test showed that the Polyimide fabric without fungus growth.

Item

Test conditions

Amount of growth

Rating

Polyimide yam

28days, humidity>90%RH

temperature 30℃

None

0


Far IR Property

Far-infrared healthcare textile can promote blood circulation and metabolism,enhance immunity. 

Polyimide fabrics meet the national standard for the far-infrared healthcare product with a far infrared ray of 4~16μm and normal emittance of 88%.

Number

Test Item

Standard

Result

1

Normal emission

≥0.80

0.88

2

Wavelength

4~16

4~16

 

Thermal Insulation Property

As an effcient thermal insulation material, Polyimide fiber has a very low heat conductivity coefficient, and its thermal performance is higher than that of cotton, wool, silk and other traditional materials. 

The 210g/m’Polyimidefiber thermal insulation has a CLO value of 4.13 and a thermal resistance of0.64 m’·k/w, which is higher than that of 3M's Thinsulate™ with the same weight. It has been used in cold-proof clothing and quilts.

Category

Weight(g/m)

Thickness(mm)

CLO

Thermal resistance   (m*.k/w)

Polyimide

210

15.5

4.13

0.64

Thinsulate™G200

200

20

3.3

0.51

Thinsulate™ KL200

200

27

4

0.62

Thinsulate™KL250

250

33

4.6

0.71

Thinsulate™HZ250

250

33

4.3

0.67

Thinsulate™ KZ200

200

25

3.7

/

Thinsulate™Z250

250

27

4.0

0.62

 

Electrical Insulation Performance

The dielectric constant of polyimide is 3.4, and the corona resistance is good(parameter from the publically reported data of polyimide materials).


Color fastness

Polyimide solution dyed woven fabric has passed the colorfastness test and the results outperform the aramid one.

Item

Results

Testing Method

Color fastness to light

Grade 7

ISO105-B02

Color fastness to dry rubbing

Grade 4~5

ISO105-X12

Color fastness to wet rubbing

Grade 4~5

ISO105-X12

Color fastness to water

Grade 4~5

ISO105-E01

Color fastness to Acid perspiration

Grade 4~5

ISO105-E04

Color fastness to alkali perspiration

Grade 4~5

ISO105-E04

Color fastness to dry cleaning

Grade 4~5

ISO105-D01

Color fastness to washing

Grade 4~5

ISO105-C10


Healthy environment protection

Polyimide fiber is environmentally friendly from manufactur

ring to end use, and has passed Oeko-Tex® Standard 100, meeting EU textile import requiren ments.

 


Polyimide Fiber Application 


High performance flame retardant protective clothing

  • Fire fighting clothing

  • Special combat headgear

  • Flight suit, ship damage control sui

Polyimide Fiber ApplicationPolyimide Fiber Application




Polyimide Fiber ApplicationPolyimide Fiber Application

High performance insulation

  • High-performance lightweight thermal filling material          

  • High thermal textiles

  • High performance insulation felt



High performance environmental protection filter material

  • High temperature dust filter material

  • High-end automotive paint room filter material

Polyimide Fiber ApplicationPolyimide Fiber Application




Polyimide Fiber ApplicationPolyimide Fiber Application


Composite material
  • High performance insulating paper

  • High performance honeycomb core material

  • Rubber reinforced material

  • High performance ablative material for solid rocket motors  




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