How to distinguish ABS fiber cable tray and PVC fiber cable tray?

Release time: 2022-10-26

There are too many advertisements about ABS fiber cable tray on the Internet. In fact, there are very few manufacturers of fiber cable tray in China. Most of the companies on the Internet are resale companies. Even fewer can produce ABS or PC/ABS fiber cable tray. Since the PVC fiber cable tray will age and become brittle after a few years, which will seriously affect the security of optical fiber communication in the equipment room.

fiber cable tray in date room

1. The scientific name of PVC is polyvinyl chloride, which contains chlorine element. It will slowly release chlorine gas at room temperature. When the temperature reaches about 60°C or above, a large amount of chlorine gas will be released, which is harmful to human body. The main disadvantage of PVC is that it ages and becomes brittle after a few years.

PVC cannot directly produce optical fiber cable tray, and PVC must be doped with calcium carbonate to produce optical fiber cable tray. The specific gravity of PVC is about 1.33 grams/cubic centimeter, and the specific gravity of PVC mixed with calcium carbonate is above 1.6 grams/cubic centimeter.

2. ABS is the acronym for acrylonitrile-butadiene-styrene copolymer, which is a terpolymer composed of acrylonitrile, butadiene and styrene. ABS has excellent comprehensive physical and mechanical properties, excellent low temperature impact resistance and good stability. The specific gravity of ABS is between 1.05 g/cm3 and 1.1 g/cm3.

The PC/ABS alloy overcomes the shortcomings of the two raw materials of PC and ABS, and promotes the advantages of each other. After the two are blended, the heat resistance, toughness, impact strength and flame retardancy of ABS are improved, and PC processing is improved. performance, reducing production costs. The specific gravity of PC/ABS alloy is between 1.1 g/cm3 and 1.2 g/cm3. Because of the toxicity of PVC and the characteristics of easy decomposition and aging, China has stipulated that PVC should not be used in water pipes and products related to people's livelihood in the 1990s.
Foreign countries are limited to the EU RoHS2.0 directive and low-smoke halogen-free requirements, and basically prohibit the use of PVC fiber cable tray. Domestic operators in China require manufacturers to provide optical fiber cable tray made of ABS.

application of fiber cable tray

According to the above introduction to ABS, PC/ABS, PVC fiber channel, we can easily distinguish:
1. Check the weight: the same 2.8-3.0mm thick 240 fiber channel weighs about 4 kg, which can be judged as ABS or PC/ABS fiber cable tray; the weight is more than 6 kg is the PVC fiber cable tray.
2. Burning: burn the optical fiber channel with a lighter, there is the smell of burning rubber, yellow flame, black smoke, and obvious melting and boiling phenomenon. After cooling, the colloid condenses on the cable tray body and is not easy to wipe off by hand, it is ABS Or PC/ABS optical fiber cable tray; it has a pungent odor of hydrochloric acid volatilization, a yellowish-green flame, no obvious melting and boiling phenomenon, and the agglomerated material after cooling is easy to be wiped off by hand.
3. The best method is to send it to a testing agency for testing. The cost is not high, and the material can be accurately determined.

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