Method for preparing silane crosslinked polyethylene insulation material for electric wires and cables by two-step way

Abstract

The invention relates to the field of insulation materials, in particular to a silane crosslinked polyethylene insulation material for electric wires and cables. A method for preparing the silane crosslinked polyethylene insulation material for electric wires and cables by a two-step way mainly comprises two steps of 1, preparation of a catalyst master batch; 2, preparation of a finished product. The insulation material is prepared from the following components of LLDPE (linear low density polyethylene)-7042, LDPE (low density polyethylene), a silane coupling agent, a crosslinking agent DCP, an antioxidant 300 and the catalyst master batch; the catalyst master batch comprises the following components of LLDPE-7042, LLDPE-8320, PP (polypropylene), an antioxidant DLTP, an antioxidant 1024, organic tin and a fluororubber master batch. The insulation material has the advantages that the insulation material is mainly used for insulation layers of cables, and is mainly used for replacing the existing PVC (polyvinyl chloride) material; the insulation property is better than the insulation property of PVC, and the poisonous and harmful gas will be released by the PVC when the electric wire is aged and catches a fire, but the silane insulation material has no poison and harm.

Description

technical field

[0001] The invention relates to the field of insulating materials, in particular to silane cross-linked polyethylene insulating materials for wires and cables. Background technique

[0002] The types of polyolefins used in the cable industry mainly include PE, PP, EVA and EEA, etc. Among them, the relatively large amount and long application history are mainly PE, which include HDPE, MDPE, LDPE, LLDPE and cross-linked XLPE. Their application Needless to say. The current application and development trends of polyolefins in the industry mainly focus on the following aspects:

[0003] (1) Serialization and perfection of halogen-free and low-smoke materials

[0004] Halogen-free, low-smoke, flame-retardant cable materials have been developing rapidly in recent years, and thermoplastic materials that meet the requirements of the IEC92-359 standard have been more and more widely used. With the requirements of cables for oil platforms, nuclear power plants, ships...

Examples

Embodiment 1

[0043] The silane cross-linked polyethylene insulating material for wire and cable is prepared from the following components by weight percentage:

[0044]

[0045] Described catalyst masterbatch is made of following component:

[0046]

[0047] The two-step method for preparing silane cross-linked polyethylene insulating materials for wires and cables mainly consists of two parts, one is the preparation of catalyst masterbatch, and the other is the preparation of finished products.

[0048] 1. Catalyst masterbatch preparation:

[0049] Stir the above materials in the mixer, first stir at low speed for 1 minute and then at high speed for 3 minutes, then release and pour into the hopper of the extruder (extruder temperature: 140-180°C), extrude through the twin-screw, and then pass through the cooling water tank for cooling , and then blown dry by a fan before cutting into pellets. The pellets are dried in a drying tower (set at 80°C) for more than 2 hours and then packe...

Embodiment 2

[0060] The silane cross-linked polyethylene insulating material for wire and cable is prepared from the following components by weight percentage:

[0061]

[0062] Described catalyst masterbatch is made of following component:

[0063]

[0064]

[0065] The insulating material mentioned above was prepared by the two-step method of Example 1.

Embodiment 3

[0067] The silane cross-linked polyethylene insulating material for wire and cable is prepared from the following components by weight percentage:

[0068]

[0069] Described catalyst masterbatch is made of following component:

[0070]

[0071] The method for preparing the silane cross-linked polyethylene insulating material for electric wires and cables by one-step method mainly consists of two parts, one is the preparation of the catalyst masterbatch, and the other is the preparation of the finished product.

[0072] 1) Catalyst masterbatch preparation: Stir the above catalyst masterbatch materials in a mixer, first stir at a low speed for 1 minute, then stir at a high speed for 3 minutes, then pour them into the hopper of the extruder, the temperature of the extruder: 140-180°C, After the screw is extruded, it is cooled in a cooling water tank, and then dried by a fan before being pelletized. The pellets are dried in a drying tower at 80°C for more than 2 hours, and ...

technical field

[0001] The invention relates to the field of insulating materials, in particular to silane cross-linked polyethylene insulating materials for wires and cables. Background technique

[0002] The types of polyolefins used in the cable industry mainly include PE, PP, EVA and EEA, etc. Among them, the relatively large amount and long application history are mainly PE, which include HDPE, MDPE, LDPE, LLDPE and cross-linked XLPE. Their application Needless to say. The current application and development trends of polyolefins in the industry mainly focus on the following aspects:

[0003] (1) Serialization and perfection of halogen-free and low-smoke materials

[0004] Halogen-free, low-smoke, flame-retardant cable materials have been developing rapidly in recent years, and thermoplastic materials that meet the requirements of the IEC92-359 standard have been more and more widely used. With the requirements of cables for oil platforms, nuclear power plants, ships...

Examples

Embodiment 1

[0043] The silane cross-linked polyethylene insulating material for wire and cable is prepared from the following components by weight percentage:

[0044]

[0045] Described catalyst masterbatch is made of following component:

[0046]

[0047] The two-step method for preparing silane cross-linked polyethylene insulating materials for wires and cables mainly consists of two parts, one is the preparation of catalyst masterbatch, and the other is the preparation of finished products.

[0048] 1. Catalyst masterbatch preparation:

[0049] Stir the above materials in the mixer, first stir at low speed for 1 minute and then at high speed for 3 minutes, then release and pour into the hopper of the extruder (extruder temperature: 140-180°C), extrude through the twin-screw, and then pass through the cooling water tank for cooling , and then blown dry by a fan before cutting into pellets. The pellets are dried in a drying tower (set at 80°C) for more than 2 hours and then packe...

Embodiment 2

[0060] The silane cross-linked polyethylene insulating material for wire and cable is prepared from the following components by weight percentage:

[0061]

[0062] Described catalyst masterbatch is made of following component:

[0063]

[0064]

[0065] The insulating material mentioned above was prepared by the two-step method of Example 1.

Embodiment 3

[0067] The silane cross-linked polyethylene insulating material for wire and cable is prepared from the following components by weight percentage:

[0068]

[0069] Described catalyst masterbatch is made of following component:

[0070]

[0071] The method for preparing the silane cross-linked polyethylene insulating material for electric wires and cables by one-step method mainly consists of two parts, one is the preparation of the catalyst masterbatch, and the other is the preparation of the finished product.

[0072] 1) Catalyst masterbatch preparation: Stir the above catalyst masterbatch materials in a mixer, first stir at a low speed for 1 minute, then stir at a high speed for 3 minutes, then pour them into the hopper of the extruder, the temperature of the extruder: 140-180°C, After the screw is extruded, it is cooled in a cooling water tank, and then dried by a fan before being pelletized. The pellets are dried in a drying tower at 80°C for more than 2 hours, and ...

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