CN104992761A - Material for fire-resistant cable and preparing process thereof - Google Patents

Abstract

The invention discloses a material for a fire-resistant cable and a preparing process thereof. The material is composed of the following raw materials according to proportions of weight parts: 60-100 parts of high temperature vulcanized silicone rubber, 20-100 parts of silicon dioxide, 20-30 parts of white carbon black, 80-120 parts of porcelainized powder, 2-8 parts of a foaming assistant agent, 50-80 parts of glass fibers and 4-10 parts of a coupling agent. The material is nontoxic and odorless at normal temperature, has good flexibility and elasticity and has excellent moisture resistance and water absorption resistance, and a ceramic-like substance after combustion is in the shape of a hard and uniform honeycomb shell, so the object has the excellent insulating property, the excellent heat insulation property and excellent fire insulation resistance and fire resistance, can also bear a shock and a vibration and can prevent infiltration of water.

Description

A kind of fire-resisting cable material and preparation technology thereof

Technical field

The present invention relates to technical field of cable production, specifically belong to a kind of fire-resisting cable material and preparation technology thereof.

Background technology

Existing domestic and international fire-resisting cable mainly contains the fire-resisting cable of magnesium oxide mineral insulated fireproof cable and Mica tape inorganic insulation.Though mineral insulated cable has good fire resistance, its manufacturing process is complicated, production cost is high, factory length is limited, and cable is stone cannot bend, and joint is complicated, and difficulty of construction is very high, is difficult to extensive use.Although Mica tape fire-resisting cable work technique is simple, factory length is unrestricted, mica tape ubiquity shortcoming, after high-temp combustion, the mechanical strength of mica tape significantly reduces, become fragile, after being subject to strenuous vibration, easy powder of detached, causes fire-resistant poor effect.And because of dry linting easy when mica tape rubs, cause a large amount of dust in wrapped scene to bring threat to the health of operating personnel.There is scientific research personnel's exploratory development ceramic silicon rubber insulating flame-resistant cable in recent years, but because of need in cable making process special mixing, extrude and vulcanizing equipment, complex process, and be difficult to average out between isolation layer intensity and fire resistance, ceramic degree is difficult to the resistance to extreme misery test by fire-resisting cable.

Summary of the invention

For the problems referred to above, the object of this invention is to provide a kind of fire-resisting cable material, nontoxic under normal temperature, tasteless, there is good flexibility and elasticity, and the moisture resistance of excellence and water absorption resistance, the material of the ceramic-like after burning is hard, uniform cellular housing, and such object has excellent insulating properties, thermal insulation, fire insulation fire resistance, also can withstand shocks and shake simultaneously, and the infiltration of anti-sealing.

The technical solution used in the present invention is as follows:

A kind of fire-resisting cable material, described material is made up of following raw materials by weight portion proportioning, heat vulcanized silicone rubber 60 ~ 100 parts, silicon dioxide 20 ~ 100 parts, white carbon 20 ~ 30 parts, Vitrified powder 80 ~ 120 parts, blowing promotor 2 ~ 8 parts, 50 ~ 80 parts, glass fibre, coupling agent 4 ~ 10 parts.

Described coupling agent is made up of the raw material of following parts by weight: vinyltriacetylsilane 1 ~ 2 part, butadienyl triethoxysilane 6 ~ 8 parts, vinyl silicone oil 0.3 ~ 0.4 part, diluent 28 ~ 32 parts, activating agent 0.05 ~ 0.08 part.

Material is used for cable and produces expressing technique, S1, by above-mentioned material heat vulcanized silicone rubber 60 ~ 100 parts, silicon dioxide 20 ~ 100 parts, white carbon 20 ~ 30 parts, blowing promotor 2 ~ 8 parts, 50 ~ 80 parts, glass fibre, coupling agent 4 ~ 10 parts, mixing in kneader, temperature is not higher than 100 DEG C;

S2 vacuumizes kneader, vacuumizes 60 minutes, and temperature remains on 150 ~ 170 DEG C;

Vitrified powder 80 ~ 120 parts is added kneader by S3, makes Vitrified powder and mixing heat vulcanized silicone rubber, silicon dioxide, white carbon, blowing promotor, glass fibre, coupling agent evenly mixing, forms the ceramic rubber of bulk;

The ceramic rubber of bulk is shifted out kneader by S4, and after cooling, and puts into extruder and adopts and will take cold-extruded, the temperature of the screw rod of extruder, head, fuselage with lower than 40 DEG C, the highest must not more than 50 DEG C.

Compared with the prior art, beneficial effect of the present invention is as follows:

Nontoxic under normal temperature of the present invention, tasteless, there is good flexibility and elasticity, and the moisture resistance of excellence and water absorption resistance, possesses the speciality of silicon rubber, fire-resisting ceramic silicone rubber is under the ablation of flame, namely start to sinter hard ceramic-like armouring housing into after burning 2-4min, the isolation layer of this hard ceramic-like armouring housing can the burning away of very effective stop flame; And being given up smoking completely by burning about 2min, in ensuing ablation process, itself no longer including smog and producing; The smog that produces in the 2min in early stage is also Halogen, nontoxic, harmless; Smog is the rear solid flue dust produced of organosilicon burning mainly, the material of the ceramic-like after burning is hard, uniform cellular housing, such object has excellent insulating properties, thermal insulation, fire insulation fire resistance, also can withstand shocks and shake simultaneously, and the infiltration of anti-sealing.

Embodiment

A kind of fire-resisting cable material, described material is made up of following raw materials by weight portion proportioning, heat vulcanized silicone rubber 60 ~ 100 parts, silicon dioxide 20 ~ 100 parts, white carbon 20 ~ 30 parts, Vitrified powder 80 ~ 120 parts, blowing promotor 2 ~ 8 parts, 50 ~ 80 parts, glass fibre, coupling agent 4 ~ 10 parts; Described coupling agent is made up of the raw material of following parts by weight: vinyltriacetylsilane 1 ~ 2 part, butadienyl triethoxysilane 6 ~ 8 parts, vinyl silicone oil 0.3 ~ 0.4 part, diluent 28 ~ 32 parts, activating agent 0.05 ~ 0.08 part.

Material is used for cable and produces expressing technique, S1, by above-mentioned material heat vulcanized silicone rubber 60 ~ 100 parts, silicon dioxide 20 ~ 100 parts, white carbon 20 ~ 30 parts, blowing promotor 2 ~ 8 parts, 50 ~ 80 parts, glass fibre, coupling agent 4 ~ 10 parts, mixing in kneader, temperature is not higher than 100 DEG C;

S2 vacuumizes kneader, vacuumizes 60 minutes, and temperature remains on 150 ~ 170 DEG C;

Vitrified powder 80 ~ 120 parts is added kneader by S3, makes Vitrified powder and mixing heat vulcanized silicone rubber, silicon dioxide, white carbon, blowing promotor, glass fibre, coupling agent evenly mixing, forms the ceramic rubber of bulk;

The ceramic rubber of bulk is shifted out kneader by S4, and after cooling, and puts into extruder and adopts and will take cold-extruded, the temperature of the screw rod of extruder, head, fuselage with lower than 40 DEG C, the highest must not more than 50 DEG C.

The physical property of 1.5mm2 India-rubber wire of the present invention

The ablation result cable of India-rubber wire of the present invention in propane flame

Nominal cross/mm2	After 700 ~ 950 DEG C × 90min ablation
		1.5	Pass through
4.0	Pass through
		6/10KV 3×70	Pass through
35KV 3×120	Pass through

Nontoxic, tasteless under material normal temperature of the present invention, there is good flexibility and elasticity, and the moisture resistance of excellence and water absorption resistance, possesses the speciality of silicon rubber, fire-resisting ceramic silicone rubber is under the ablation of flame, namely start to sinter hard ceramic-like armouring housing into after burning 2-4min, the isolation layer of this hard ceramic-like armouring housing can the burning away of very effective stop flame; And being given up smoking completely by burning about 2min, in ensuing ablation process, itself no longer including smog and producing; The smog that produces in the 2min in early stage is also Halogen, nontoxic, harmless; Smog is the rear solid flue dust produced of organosilicon burning mainly, the material of the ceramic-like after burning is hard, uniform cellular housing, such object has excellent insulating properties, thermal insulation, fire insulation fire resistance, also can withstand shocks and shake simultaneously, and the infiltration of anti-sealing.

More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.

Claims (3)

1. a fire-resisting cable material, it is characterized in that: described material is made up of following raw materials by weight portion proportioning, heat vulcanized silicone rubber 60 ~ 100 parts, silicon dioxide 20 ~ 100 parts, white carbon 20 ~ 30 parts, Vitrified powder 80 ~ 120 parts, blowing promotor 2 ~ 8 parts, 50 ~ 80 parts, glass fibre, coupling agent 4 ~ 10 parts.

2. fire-resisting cable material according to claim 1, is characterized in that: described coupling agent is made up of the raw material of following parts by weight: vinyltriacetylsilane 1 ~ 2 part, butadienyl triethoxysilane 6 ~ 8 parts, vinyl silicone oil 0.3 ~ 0.4 part, diluent 28 ~ 32 parts, activating agent 0.05 ~ 0.08 part.

3. material according to claim 1 and 2 is used for cable production expressing technique, it is characterized in that: S1, by above-mentioned material heat vulcanized silicone rubber 60 ~ 100 parts, silicon dioxide 20 ~ 100 parts, white carbon 20 ~ 30 parts, blowing promotor 2 ~ 8 parts, 50 ~ 80 parts, glass fibre, coupling agent 4 ~ 10 parts, mixing in kneader, temperature is not higher than 100 DEG C;

S2 vacuumizes kneader, vacuumizes 60 minutes, and temperature remains on 150 ~ 170 DEG C;

Vitrified powder 80 ~ 120 parts is added kneader by S3, makes Vitrified powder and mixing heat vulcanized silicone rubber, silicon dioxide, white carbon, blowing promotor, glass fibre, coupling agent evenly mixing, forms the ceramic rubber of bulk;

The ceramic rubber of bulk is shifted out kneader by S4, and after cooling, and puts into extruder and adopts and will take cold-extruded, the temperature of the screw rod of extruder, head, fuselage with lower than 40 DEG C, the highest must not more than 50 DEG C.