Low smoke non-halogen one-stage process silane naturally crosslinked polyolefin cable material and preparation method thereof

Abstract

The invention relates to a low smoke non-halogen one-stage process silane naturally crosslinked polyolefin cable material and the cable material contains the raw materials of flame retardant masterbatch, catalyst masterbatch and crosslinking compounding agent. The preparation method comprises the following steps: mixing flame retardant masterbatch, catalyst masterbatch and crosslinking compounding agent in a sealed mixer for absorption, discharging after 3-5 hours, and packaging to obtain the low smoke non-halogen one-stage process silane naturally crosslinked polyolefin cable material finished product. Compared with the common low smoke non-halogen one-stage process silane naturally crosslinked polyolefin cable material, the temperature resistant grade and mechanical properties of the product of the invention can be increased and the problem that the common low smoke non-halogen polyolefin cable material is easy to crack can be eliminated.

Description

technical field [0001] The invention relates to a low-smoke, halogen-free one-step silane naturally crosslinked polyolefin cable material and a preparation method thereof, belonging to the technical field of wire and cable materials. Background technique [0002] Polyolefin materials are flammable materials. When there are external fire sources or internal faults in the operation of wires and cables, the wires and cables are easy to burn. In order to reduce fire losses, it is necessary to add flame retardants to the materials to achieve flame retardancy of wires and cables. , Traditional brominated flame retardants will cause harm to the environment. Once a fire breaks out, a large amount of smoke will easily be generated, which will suffocate people and pollute the surrounding environment. The current low-smoke halogen-free cable materials are generally filled with a large amount of inorganic fillers to achieve the purpose of flame retardancy. However, after adding a large ...

AI Technical Summary

Problems solved by technology

[0002] Polyolefin materials are flammable materials. When there are external fire sources or internal faults in the operation of wires and cables, the wires and cables are easy to burn. In order to reduce fire losses, it is necessary to add flame retardants to the materials to achieve flame retardancy of wires and cables. , the traditional brominated flame retardants will cause harm to the environment. Once a fire breaks out, it will easily produce a lot of smoke, which will suffocate people and pollute the surrounding environment.

The current low-smoke halogen-free cable materials are generally filled with a large amount of inorganic fillers to achieve the purpose of flame retardancy. However, after adding a large amount of inorganic flame retardants, the wires and cables have problems such as low temperature resistance, poor mechanical properties, and easy cracking. The cable factory caused great losses, and high-performance cross-linked low-smoke and halogen-free materials came into being. Now the cross-linked low-smoke and halogen-free materials on the market are mainly radiation cross-linked low-smoke and halogen-free materials. The investment in irradiation equipment is large, and the damage to the material is relatively large during the irradiation crosslinking process, and residual components are easily generated inside the material

Another type of cross-linked low-smoke halogen-free material is two-step silane cross-linked low-smoke halogen-free cable material. This material is divided into component A and component B. Since component A is a grafted silane coupling agent The final product, the process is more complicated, time-consuming, the product storage period is short, B component needs to be granulated separately, and the energy consumption is relatively large

Components A and B have to be mixed in the wire and cable factory. After cable formation, the cross-linking reaction can only occur through boiling or steaming. A large amount of moisture reduces the electrical properties of the material, and the product performance is unstable. cause a lot of trouble