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Para aramid fiber 

Para aramid paper 

Para aramid fiber

Para aramid paper

Para aramid paper

Detail

 

Since the specific strength and specific modulus of para-aramid are 6 times and 3 times that of steel wire, and 2 times and 10 times that of high strength nylon, they can maintain normal levels in the temperature range of -200 ℃-200℃. Under the premise of the same tensile strength, the para-aramid skeleton material can greatly reduce the quality of rubber products and can be used in extreme weather conditions. The para-aramid has excellent low creep, fatigue resistance, low heat shrinkage and chemical corrosion resistance, which can significantly improve the dimensional stability and service life of rubber products.

Table 2 Comparison of Properties of Commonly Used Fiber Reinforced Materials:

 
Item
 
Para-aramid
Steel wire
Rayon
Nylon 66
Polyester industrial yarn

Density/g cm'³

1.44

7.85

1.53

1.14

1.38

Decomposition temperature(N₂)/℃

>500

1600

200

255

260

Tensile strength/MPa

2830

2550
780
960
1150

Specific strength

 
 
 
 
 

mNtex'¹

1970

300

510

840

830

g·d

22.3

3.7

5.8

9.5

9.4

Initial modulus/GPa

80

160
18
6
14

Specific modulus

 

 
 
 
 

Ntex-¹

55

20

12
50
10

g·di-¹

600

220

140
60
110

Thermal expansion coefficient/10-.6°F

-2.2

3.7

-
-
-

Elongation at break%

3.6

1.9

13
20
13.5

Heat resistance(200°Cx48h)/%

90

100

20
45
55
Air dry heat shrinkage(160°C×4mins)%
<0.1
0
1.0
3.8
5.0

[Ma Qianli, Liu Zhen, Lin Weihong, Huang Xiaoting “Development Status of Para-aramid Reinforced Rubber Composites Industry” www.iooroo.cpm]

Para-aramid is widely used in the reinforcement and protection of rubber products such as tires, conveyor belts, driving belts and hoses. Aramid filaments (original filaments) are usually not directly used for rubber reinforcement. They are twisted to improve the mechanical properties such as breaking strength and elongation of the fibers, and soaked in glue to improve the interfacial bonding properties between the fibers and the rubber. The aramid twisted yarn can be directly used for belt reinforcement after being soaked in glue. If used for the reinforcement of tires, conveyor belts or hoses, it also needs to be processed into cord fabric, canvas or mesh.

In addition, if para-aramid is processed into diffuse gum staple fiber or masterbatch and uniformly dispersed in the rubber matrix, it can reduce the endogenous heat of the rubber product, improve the wear resistance, and further prolong the service life.

Table 3 Commercialized para-aramid reinforced tire applications:

Tire dealer Aramid mark Tire brand

Enhanced parts

Auto brands

Goodyear

Kevlar

Fortera、 Wrangler

Silent Armor

Jeep

Michelin

Twaron

Eagle F1

Response Edge

Porsche, BMW, Ferrari

Dunlop

KevlarEE

Pilot Super Sport

Ceinture/ Belt

/

Pirelli

Twaron Kevlar

SP Sport MaxxTT

Sidewall

Aston Martin Ferrari Maserati

Continental

Twaron

P-Zero

Sidewall Cap Ply

Audi R8 Porsche 911 Tesla ModelS

Cooper

Twaron

-

Aralon350M Hybrid Cap Ply

/

Nokian

Twaron

ZLineSUV

Belt/Bead

Audi RS6

Bridgestone

Kevlar

Potenza

Aramid/Nylon Belts

Aston Martin Rapide FerrariF458

Technical standard for JF910A para-polyarylamide:

Scale
Unit

Index value

Nominal thickness

mm

0.05

0.08

0.13

Thickness

mm

0.055±0.007

0.08±0.01

0.13±0.015

Quantitative

g/m²

41±3

63±5

116±8

Longitudinal tensile strength

KN/m

≥2.7

≥3.3

≥4.1

Horizontal tensile properties

KN/m

≥2.1

≥2.7

≥3.3

Longitudinal elongation

%

≥1

≥1

≥1

Lateral elongation

%

≥1

≥1

≥1

Longitudinal tearing resistance

N

≥0.6

≥1.3

≥1.8

Lateral tearing resistance

N

≥1.0

≥1.8

≥2.4

Dielectric strength

kv/mm

≥15

≥15

≥15

Relative dielectric constant

/

≤1.5

≤1.8

≤2.1

Dielectric loss factor

x10-³

≤10

≤10

≤12

Longitudinal heat shrinkage@300℃,40min

%

≤2

≤2

≤2

Lateral heat shrinkage@300°C40min
%
≤2
≤2
≤2

 

Technical standard for JF912B para-polyarylamide:

Scale
Unit

Index value

Nominal thickness

mm

0.05

0.08

0.13

Thickness

mm

0.055±0.008

0.08±0.01

0.13±0.015

Quantitative

g/m²

41±3

63±5

116±8

Longitudinal tensile strength

KN/m

≥2.4

≥3.0

≥3.7

Horizontal tensile properties

KN/m

≥2.0

≥2.4

≥3.0

Longitudinal elongation

%

≥1

≥1

≥1

Lateral elongation

%

≥1

≥1

≥1

Longitudinal tearing resistance

N

≥0.5

≥1.1

≥1.5

Lateral tearing resistance

N

≥0.8

≥1.5

≥2.0

Dielectric strength

kv/mm

≥20

≥20

≥20

Relative dielectric constant

/

≤1.5

≤1.8

≤2.1

Dielectric loss factor

x10-³

≤10

≤10

≤12

Longitudinal heat shrinkage@300℃,40min

%

≤2

≤2

≤2

Lateral heat shrinkage@300°C40min
%
≤2
≤2
≤2

Technical standard for JF912B para-polyarylamide:

Scale
Unit

Index value

Nominal thickness

mm

0.13

0.18

0.25

Thickness

mm

0.13±0.03

0.018±0.04

0.25±0.05

Quantitative

g/m²

40±3

64±5

75±6

Longitudinal tensile strength

KN/m

≥2.1

≥2.6

≥3.0

Horizontal tensile properties

KN/m

≥1.6

≥2.0

≥2.4

Longitudinal elongation

%

≥1

≥1

≥1

Lateral elongation

%

≥1

≥1

≥1

Longitudinal tearing resistance

N

≥0.4

≥1.0

≥1.2

Lateral tearing resistance

N

≥0.6

≥1.4

≥1.6

Dielectric strength

kv/mm

≥12

≥12

≥12

Relative dielectric constant

/

≤1.5

≤1.8

≤2.1

Dielectric loss factor

x10-³

≤10

≤10

≤12

Longitudinal heat shrinkage@300℃,40min

%

≤2

≤2

≤2

Lateral heat shrinkage@300°C40min
%
≤2
≤2
≤2

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Corresponding parameter set not found, please add it in property template of background
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