Production process of high-performance fire-resistant optical cable

1. The structure is made of ceramic fiber high-performance flame-retardant material to wrap the micro-bundle tube vertically, and the flame-retardant inner sheath embedded with two non-metallic materials is extruded outside the wrapping tape. Sheath: While improving the high-density capacity of the optical fiber of the optical cable, multiple measures such as double-layer flame-retardant sheathing material, ceramic fiber tape, mica tape and so on are used to ensure the excellent flame-retardant performance of the optical cable.

2. The outermost layer of the protective layer. The high-performance flame-retardant and fire-resistant optical cable is characterized in that the protective layer further comprises an inner sheath and a mica tape, and the inner sheath and the mica tape are sequentially arranged between the ceramic fiber tape and the outer sheath from the inside to the outside, so The cable core is a freely twisted micro-bundle tube, and there are two reinforcing members, which are embedded in parallel in the inner sheath. The inner cable core is a loose tube structure, and the optical fiber is placed inside the loose tube and filled with fiber paste. There are two pieces, which are embedded in the outer sheath in parallel.

The protective layer also includes an inner sheath and a mica tape, and the inner sheath and the mica tape are sequentially arranged on the water blocking belt and the mica tape from the inside to the outside.

3. Between the outer sheaths, the cable core is a loose tube structure, consisting of at least 3 loose tubes, the optical fiber is placed inside the loose tube and filled with fiber paste, and the loose tube is covered with a ceramic fiber tape , the water blocking tape is wrapped on the outside of the loose tube, the loose tube is filled with cable paste, and the reinforcing member is placed in the middle of the cable core.

The main application of flame retardant and fire-resistant optical cable, generally by selecting excellent flame retardant sheath material to improve the flame retardant performance of the optical cable, but the non-flame retardant materials such as sleeve, fiber paste, grease in the optical cable will also affect the resistance of the entire optical cable. burning level.

When a fire occurs, the traditional optical fiber cable will be brittle and broken due to the damage of the external environmental performance or mechanical stress, which will lead to the interruption of the transmission signal.

4. The effectiveness of the safety protection system is greatly affected; on the other hand, even if the core of the optical cable is not damaged by external flame burns, in the process of subsequent flame extinction and gradual cooling, the surface material of the optical cable is due to the temperature after combustion. Cooling shrinkage leads to adhesion stress on the surface of the optical fiber, which affects the distortion or interruption of the transmission signal, which will inevitably lead to the failure of the use of telephones, CCTVs, automatic doors, alarm bells, etc., and will greatly affect the rescue measures after a fire occurs.

With the continuous popularization of broadband networks, optical cables have been widely used in public places such as hospitals, cinemas, theaters, subways, petroleum and other industrial places, and these key places are extremely demanding on flame retardant safety levels.

High-performance flame-retardant and fire-resistant optical cable, on the basis of ensuring that it does not become a tool for delaying combustion in a fire, to ensure that the transmission of optical signals is not affected during the occurrence of a fire and a period of time after it occurs, ensuring smooth communication. The traditional flame retardant optical cable has a general performance.

5. It is composed of central reinforcement, cable core of loose tube structure, moisture barrier layer, inner sheath, armor layer and outer sheath. For traditional optical cables, the common measure to improve the combustion performance is to enhance the flame retardant properties of the optical cable jacket material.

However, since there are still non-flame retardant substances such as sleeves, fiber pastes, and ointments in the optical cable, even if more expensive flame retardant materials are used, the high performance flame retardant of the optical cable cannot be guaranteed, which affects the performance of the optical cable in some safety levels. Use in high occasions.

6. An optical cable, wherein the reinforcing member is a non-metallic reinforcing member. The protective layer also includes an inner sheath and a mica tape. The inner sheath and the mica tape are sequentially arranged between the ceramic fiber tape and the outer sheath from the inside to the outside. The cable core is a freely twisted micro-bundle tube, which is embedded in the inner sheath inside the set.

The cable core is a loose tube structure, the optical fiber is placed inside the loose tube and filled with fiber paste, and there are two reinforcing members, which are embedded in the outer sheath in parallel. The protective layer also includes an inner sheath and a mica tape. The inner sheath and the mica tape are sequentially arranged between the water blocking tape and the outer sheath from the inside to the outside. The cable core is a loose tube structure, which consists of at least three loose tubes The tube is formed, the optical fiber is placed inside the loose tube and filled with fiber paste, the loose tube is covered with ceramic fiber tape, and the water blocking tape is covered.

7. The reinforcement is placed in the middle of the cable core. Mainly through the improvement of the optical cable structure and novel raw materials, the flame retardant performance of the optical cable is improved, which provides a higher guarantee for the safety level of public places and flammable areas. The design and development process is as follows. In the structural design process, we Focusing on the characteristics of high flame retardant and fire resistance, that is, considering that public places such as hospitals, cinemas and some flammable areas are extremely demanding on flame retardant safety levels, the present invention ensures high flame retardant fire resistance from structural design and special material selection. ;

Considering that the main application scene of the optical cable that generally pursues high performance, flame retardant and fire resistance is indoors, in order to avoid damage to people and property caused by the introduction of lightning, the present invention specifically excludes metals in the selection of materials.

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