Flame-retardant waterproof ointment incompatible with flame-retardant sheath material and used for filling cable

Abstract

The invention relates to the technical field of chemical industry and particularly relates to a flame-retardant waterproof ointment incompatible with a flame-retardant sheath material and used for filling a cable. The waterproof ointment is characterized by comprising the following raw material components in percentage by weight: 65-75% of base oil, 4-8% of oil stabilizer, 1-2% of antioxidant, 3-8% of thickener, 3-8% of fire retardant, 3-15% of waterproofing agent and 5-10% of absorptive particles. Compared with the prior art, the flame-retardant waterproof ointment has the following advantages: the quality guarantee period of products is greatly prolonged, the initial water absorption speed is greatly quickened, the initial expansion speed is quicker; the dropping point of the products is higher, the cone penetration is greater, and the thixotropic property is better; and a photoelectric cable made from the flame-retardant waterproof ointment is longer in service life.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a flame-retardant water-blocking ointment used for filling flame-retardant cables. Background technique [0002] With the rapid development of the wire and cable industry, a large number of filling ointments are used. The domestic industry standard YD / T 837 stipulates a variety of filling ointments for cables. There are cold application types and hot application types, and they are also useful It is used to fill loose tubes of optical cables, and it is also used to fill wires and cables or optical fiber cables. [0003] With the rapid development of society, various types of flame-retardant cables are widely used, most of which are realized by filling some ointment in the cable core and covering the cable core with a flame-retardant sheath. The ointment in the flame retardant sheathing material has a better compatibility with the flame retardant sheathing material. The...

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of society, various types of flame-retardant cables are widely used, most of which are realized by filling some ointment in the cable core and covering the cable core with a flame-retardant sheath. The ointment and the flame retardant sheathing material have better compatibility, therefore, after a period of time, the flame retardant sheathing material will usually crack, causing product safety hazards

For this reason, people use materials with better compatibility with ointment, such as polyethylene to coat the cable core first, and then extrude the flame-retardant sheath material outside the polyethylene to achieve it. Although this method The problem is partially solved, but for the product, the flame retardant performance is obviously reduced; in addition, the bonding performance between the flame retardant sheath material and the polyethylene sheath is poor, so the product cannot pass the repeated bending and torsion test. , There will be delamination between the flame retardant sheath material and the polyethylene sheath, which greatly affects the performance of the product