Extruded Fluorosilicone Rubber

 

Extruded fluorosilicone rubber is a kind of high polymer whose main chain is formed by silicon-oxygen bonds, and the chain contains trifluoroalkyl groups. Its polymerization method is similar to that of dimethyl silicone rubber. Produced by alkane ring-opening polymerization. The heat resistance and chemical resistance of fluorosilicone rubber are not as good as other fluororubbers, but because its main chain contains silicon-oxygen bonds, and the side groups contain fluorine atoms, it has the advantages of both, so it can be used at -60°C It is used in a very wide temperature range of -230°C, and has excellent fuel oil resistance and small swelling to methanol, but the disadvantage is that its physical and mechanical properties are worse than other fluororubbers.

 

 

Aluda extruded fluorosilicone rubber is a translucent or milky white extruded fluorosilicone compound with good physical and processing properties, good resilience, fast vulcanization speed and good fluidity, and is more suitable for use in Fabricate and extrude sealing strips and fluorosilicone tubes.

 

Item/Grade	Test Method	Performance Index
Model		M1050	M1060	M1070	M1080
Appearance		Translucent or grayish white, smooth, without impurities
Hardness/shore A	ATSM D2240	50±5	60±5	70±5	80±5
Tensile Strength/MPa	ATSM D412	9.2	9.3	9.4	8.1
Elongation at break,%	ATSM D412	337	293	273	173
Tear strength,KN/m	ATSM D624	16	16	17	16
Compression at set,177℃,22h	ATSM D395	7	8	9	9
Heat Resistance Strength,225℃,72h,%	ATSM D573	-20	-20	-20	-20
Heat Resistance Elongation,225℃,72h,%	ATSM D573	-20	-20	-20	-20
Fuel C Volume Change,23℃,72h,%	ATSM D471	17	17	17	17
Fuel C Strength Change,23℃,72h,%	ATSM D471	-20	-20	-20	-20
Fuel C Elongation Change,23℃,72h,%	ATSM D471	-20	-20	-20	-20

Note:

1. Vulcanizing agent: DCBP. Dosage 1.5gDCBP/100g premixed glue

2. One stage vulcanization: 110℃*15Min. Two stage vulcanization: 200℃*4H

 

 

1. Mixing: Remix several times on the open mill, add vulcanizing agent, and then adjust back to 0.5mm-1mm thin pass 8-10 times after the material is finished, and then leave the tablet and park it.

2 .Vulcanization: After re-milling the fluorosilicone compounded rubber with the vulcanizing agent, it is sliced or cut into the desired shape, and then vulcanized on the extrusion equipment to form

 

 

The extrusion process is a molding method for manufacturing semi-finished products such as rubber hoses, rubber ropes, rubber strips, and wire and cable coatings. Extruded fluorosilicone rubber is soft and has good extrusion process performance, but the extruded semi-finished product is easy to deform and stick. After extrusion, it should be isolated with talc powder in time and vulcanized as soon as possible, and the parking time should not be too long. If it is found that the rubber material is too soft and the stiffness of the extruded semi-finished product is too poor before extrusion, 2~5 parts of fumed silica should be added in time. Before extrusion, the rubber compound should be fully re-milled on the open mill. The suitable operating temperature is room temperature, and cooling water must be passed through the fuselage and machine barrel. For the extrusion of composite products (such as wires and cables), a composite head or a "T" head should be configured on the extruder. Extruded rubber hoses and rubber strips can be designed and processed according to the product size, but the expansion rate of the rubber material should be taken into account when designing. The expansion rate of extruded fluorosilicone rubber is about 5%.

 

 

Fluorosilicone materials are mainly used to prepare heat-resistant, oil-resistant and acid-resistant rubber products. Such as seals, rubber hoses, rubber pads, tapes, tapes, films, fuel tanks and impregnated products, etc. can also be used as outer sheaths for wires and anti-corrosion linings for equipment, etc., widely used in aviation industry, petroleum industry, automobile industry, chemical industry and other fields. Fluorosilicone rubber has good high and low temperature resistance and chemical stability. It can be used for a long time under 230°C and short-term use under 250°C; the brittle point is -65°C; it has excellent medium resistance and is resistant to organic solvents and inorganic acids. 1. The stability of oxidant action is excellent, especially acid resistance; it has excellent weather resistance and ozone resistance. After being exposed to the atmosphere for several years, the physical and mechanical properties change little, and the effect on microorganisms is relatively stable.

 

Storage method: store in a dry environment at room temperature, valid for one year.

Packing: Packed in plastic bags, 10 kg per bag, two bags per carton.

Shipping: This product is shipped as a non-hazardous chemical.

 

 

1. This product should be kept neutral and avoid contact with acidic and alkaline substances.

2. This product will flow under its own weight. During transportation and use, pay attention to the packaging to avoid flowing around.

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