Flurine® L series is a low-middle Mooney bisphenol-vulcanized fluoroelastomer with a fluorine content of 66%. It is a copolymer of vinylidene fluoride (VF2), hexafluoropropylene (HFP) and perfluoroalkyl vinyl ether (PMVE). It is commonly used in automotive, hydraulic, electrical and chemical industries. It has excellent heat and chemical resistance.The outstanding performance is low-temperature elasticity, which are particularly suitable for O-ring seals for fuel injectors.

General

Features

Low temperature resistance

Uses

Shaft seal, O-ring, fuel pipe. Extrusion molding

Forms

White or light-yellow flake

Items

Typical Value

Test Method

L228

     L728

L228A

L728A

Physical Properties

Fluorine Content（mass%）

65

65

Density（g/cc）

1.78~1.82

1.78~1.82

ASTM D297

Mooney Viscosity

20~49

50~89

20~49

50~89

ASTM D1646 ML 1+10 at 121°C

Water content（%）

0.15

0.15

ASTM D 5668

Vulcanization Properties

T10（s）

<130

<160

ASTM D5289

T90（s）

<240

<300

ASTM D5289

Mechanical Properties

Tensile strength（MPa）

13

13

ASTM D412 Method A

100% Modulus

6

6

ASTM D412 Method A

Elongation at Break（%）

180

180

ASTM D412 Method A

Tearing Strength（KN/m）

15

15

ASTM D624

Hardness, Shore A

75

75

ASTM D2240, Type A

Compression Set

16

16

ASTM D395, Test B 70 hours at 200℃

Thermal Properties

Low temperature retraction, TR10（℃）

-19

-21

GB/T 7758

Brittleness Temperature（℃）

-27

-34

GB/T 15256

Chemical resistance Properties

Resistance to liquids

Methanol,23℃×70h

Tensile strength change rate（%）

-10

-10

ASTM D412 Method A

Elongation at Break change rate(%)

-9

-9

ASTM D412 Method A

100％Elongation change rate（%）

-12

-12

ASTM D412 Method A

Hardness change, Shore A

-1

-1

ASTM D2240, Type A

Volume change rate（%）

+2

+2

Formulation

Curing condition

Polymer            100      MT carbon black，N990   30

Calcium hydroxide    6        Magnesium oxide         3

Fluorocure-5#        2.5

Press

Oven

10min at 177°C,0.5°

24h at 230°C