CN1034701C

CN1034701C - High flame resistant cable

Info

Publication number: CN1034701C
Application number: CN93105547A
Authority: CN
Inventors: 张全义
Original assignee: 张明阳; 张明华
Priority date: 1993-05-13
Filing date: 1993-05-13
Publication date: 1997-04-23
Anticipated expiration: 2013-05-13
Also published as: CN1095181A

Abstract

The present invention discloses a high fire resistant cable with high fire resistance and high temperature resistance. Besides, the high fire resistant cable has low smoke and has no halogen when combusted. The high fire resistant cable is an insulation layer formed in such a manner that a wire core made from a copper conductor is lapped with a mica tape, and the mica tape is coated with one layer of non-inflammable paint and is extruded to form mixing plastics. The outer part of the insulation layer is provided with a sheath made from the mixing plastics. The non-inflammable paint is composed of 90 to 95 wt% of the non-inflammable paint of organic silicon, and 5 to 10 wt% of lanthanum oxide and cerium dioxide. The mixing plastics are made from 80 to 85 wt% of PVC without containing chlorine alkali, 5 to 10 wt% of lanthanum oxide, cerium dioxide, etc., wherein the weight ratio of the lanthanum oxide to the cerium dioxide is (3 to 1): (1 to 1).

Description

High flame resistant cable

The invention belongs to a kind of cable, particularly a kind of high flame resistant cable.

Existing cable is to be wound with mica tape to constitute insulating barrier outside copper conductor, outside insulating barrier, adopt PVC to make sheath, control cable that meets GB9330-88 and the power cable that meets GB12706-91 as present use, promptly adopt PVC to make composite insulation layer and sheath, because the fusing point of PVC is low, meet fire burns, and generation chlorine and high smog, therefore, existing cable does not possess high temperature resistant, high fire-resistant performance, its maximum operating temperature only is 70～110 ℃, and in high temperature or chance fire environment, the insulating barrier of this cable and sheath all can melt even burn, and make the cable cisco unity malfunction and lose use value, and environment and human body are damaged and injure.

Provide a kind of " Speical flame retardant cable " at publication number in the Chinese invention patent prospectus of " CN1052211A ", insulating barrier, restrictive coating that it is made by conductor wire core, organosilicon fire prevention mica tape, heatproof flame-retardant CABLE MATERIALS are formed, the fire-retardant heatproof prescription of said CABLE MATERIALS is made up of multiple fire-retardant and heatproof raw material, and direct and vistanex is an one, aggregate into new polyene polymer, so it has heat-resistant fireproof preferably, but it can't operate as normal at operational environment more than 400 ℃, does not more have fire resistance.

The objective of the invention is to overcome the deficiencies in the prior art part, a kind of high high flame resistant cable fire-resistant, high temperature resistant, low smoke and zero halogen when burning is provided.

The present invention is achieved in that it is by core, wrapped mica tape on core, the insulating barrier and the sheath that are squeezed on the mica tape constitute, its special character is to scribble not burning coating material of one deck on mica tape, said not burning coating material is that the lanthana and the cerium oxide of burning coating material and 5～10% (weight) constitute by the organosilicon of 90～95% (weights), wherein the weight ratio of lanthana and cerium oxide is 3: 1～1: 1, said insulating barrier and sheath are made by mixed plastic, said mixed plastic is made by lanthana and cerium oxide that 90～95% (weights) do not contain the PVC CABLE MATERIALS and 5～10% (weight) of chlor-alkali, and wherein the ratio of lanthana and cerium oxide weight is 3: 1～1: 1.

According to above-mentioned high flame resistant cable, between insulating barrier that scribbles burning coating material not and sheath, also have a sheath and screen, said sheath is identical with the component of sheath.

Owing in insulating barrier and sheath (sheath), contain fusing point high and active good rare earth material cerium oxide and lanthana, and on mica tape, scribble the not burning coating material that contains cerium oxide and lanthana, therefore can improve the resistance to elevated temperatures and the high fire resistance of this cable; In addition, mixed plastic adopts the PVC fire-resistant cable material that does not contain chlor-alkali owing to make insulating barrier and sheath (sheath) with mixed plastic, do not produce chlorine and low cigarette in the time of can making this cable fire again, and lanthana can increase the pliability and the stability of cable, the performance of low smoke and zero halogen when therefore this cable also has burning, actual test shows, but this cable is 400～500 ℃ of operate as normal, but and under 750～800 ℃ fiery temperature environment operate as normal more than three hours, its performance meets and exceeds the 1EC331-2 standard, can be used on subway, petrochemical industry, height is built, ancient architecture, aircraft, steamer and all fire prevention high temperature places.

Below in conjunction with drawings and Examples the present invention is elaborated:

Fig. 1 is the structural representation of the present invention's (unshielded layer);

Fig. 2 is the structural representation of the present invention's (screen is arranged);

Embodiment 1:

As shown in Figure 1, the present invention is surrounded with mica tape 2a on core 1, said mica tape 2a scribbles one deck by the organosilicon of 90% (weight) burning coating material not, the not burning coating material that the cerium oxide of 7.5% (weight) lanthana and 2.5% (weight) constitutes, said mica tape 2a also can be made by the glass fiber that is coated with full mica powder, on mica tape 2a, be extruded with the insulating barrier 2b that constitutes by mixed plastic, constitute composite insulation layer 2 with mica tape 2a, outside insulating barrier 2, be wound with the sheath of making by mixed plastic 3, said mixed plastic is not contain the PVC fire-resistant cable material of chlor-alkali [by polyvinyl chloride resin-P2500 by 90% (weight ratio), oxidant, filler (potter's clay, calcium carbonate), fire retardant is (as antimonous oxide, phosphite), colouring agent and insect-proof agent are formed, be available 1 on market, the lanthana of the cerium oxide of 7.5% (weight ratio) and 2.5% (weight), in actual production, elder generation's batch mixing, after the stirring, on refining glue roller, mould and close, the roller Controllable Temperature is between 150～200 ℃, mould fashionable and be half an hour～1 hour, compressing tablet again, pelletizing, by plastic extruding machine be squeezed in that mica tape 2a goes up or pelletizing after make sheet again and make sheath 3, calcium carbonate is slightly some more on sheath 3, to strengthen its toughness.

Embodiment 2:

As shown in Figure 1, the present invention is surrounded with mica tape 2a on core 1, promptly on mica tape 2a, scribble one deck by the organosilicon of 95% (weight) the not lanthana of burning coating material and 5% (weight) and the not burning coating material that cerium oxide constitutes, wherein lanthana is 1: 1 with the ratio of cerium oxide weight, said mica tape 2a also can be made by the glass fiber that is coated with full mica powder, on mica tape 2a, be extruded with the insulating barrier 2b that constitutes by mixed plastic, constitute composite insulation layer 2 with mica tape 2a, outside insulating barrier 2, be wound with the sheath of making by mixed plastic 3, said mixed plastic is the PVC fire-resistant cable material that does not contain chlor-alkali by 95% (weight ratio), the lanthana of 5% (weight ratio) and cerium oxide, wherein lanthana is 1: 1 with the ratio of cerium oxide weight, and said fire-resistant cable material component is with embodiment 1.

Embodiment 3:

As shown in Figure 2, the present invention has one deck mica tape 2a on the core of being made by copper conductor 1, on mica tape 2a, scribble one deck by the organosilicon of 90% (weight) the not lanthana of burning coating material and 10% (weight) and the not burning coating material that cerium oxide constitutes, wherein lanthana and cerium oxide weight ratio are 1: 1, be extruded with the insulating barrier 2b that constitutes by mixed plastic scribbling on the mica tape 2a of burning coating material not again, constitute composite insulation layer 2 with mica tape 2a, one sheath 4 is arranged outside composite insulation layer 2, one screen 5 is arranged outside sheath 4, a sheath 3 is arranged outside screen 5, said sheath 4 and sheath 3 also are to be made by mixed plastic, said mixed plastic is the PVC fire-resistant cable material that is not contained chlor-alkali by 90% (weight ratio), the lanthana of 10% (weight ratio) and cerium oxide, wherein cerium oxide is 1: 1 with the ratio of lanthana weight.

Embodiment 4:

As shown in Figure 2, the present invention has one deck mica tape 2a on the core of being made by copper conductor 1, on mica tape 2a, scribble one deck by the organosilicon of 95% (weight) the not lanthana of burning coating material and 5% (weight) and the not burning coating material that cerium oxide constitutes, wherein lanthana and cerium oxide weight ratio are 3: 1, be extruded with the insulating barrier 2b that constitutes by mixed plastic scribbling on the mica tape 2a of burning coating material not, constitute composite insulation layer 2 with mica tape 2a, one sheath 4 is arranged outside composite insulation layer 2, one screen 5 is arranged outside sheath 4, one sheath 3 is arranged outside screen 5, said sheath 4 and sheath 3 also are to be made by mixed plastic, said mixed plastic is the PVC fire-resistant cable material that is not contained chlor-alkali by 95% (weight ratio), the lanthana of 5% (weight ratio) and cerium oxide are formed, and wherein lanthana is 3: 1 with the ratio of cerium oxide weight.

The PVC fire-resistant cable material component that does not contain chlor-alkali among the embodiment 3,4 is with embodiment 1.

In the above-described embodiments, described organosilicon not burning coating material can adopt the product of Lvshun organic silicon chemical factory, its standard is Q/L, GH, J, 03-92 fills a prescription and does not fire resin 35.5%, graphite powder 6.8%, talcum powder 3.5%, stibium trioxide powder 6.5%, PA powder 8.7%, DP liquid 6.3%, siccative 1.8%, dimethylbenzene 30.9% for organosilicon.

Claims

1. high flame resistant cable, by core, wrapped mica tape on core, the insulating barrier and the sheath that are squeezed on the mica tape are formed, it is characterized in that, on said mica tape, scribble not burning coating material of one deck, do not form by the lanthana and the cerium oxide of burning coating material and 5～10% (weight) by the organosilicon of 90～95% (weights) for said not burning coating material, wherein the weight ratio of lanthana and cerium oxide is 3: 1～1: 1, said insulating barrier and sheath are made by mixed plastic, said mixed plastic is the PVC that does not contain chlor-alkali (polyvinyl chloride) fire-resistant cable material by 90～95% (weight ratios), the cerium oxide of 5～100% (weight ratios) and lanthana, wherein the weight ratio of lanthana and cerium oxide is 3: 1～1: 1

2. according to the said high flame resistant cable of claim 1, it is characterized in that also having a sheath and screen between described insulating barrier and sheath, said sheath is identical with the component of sheath.