Composition of single-component silane natural cross-linking polyethylene materials and processing process thereof

A technology of natural cross-linking and silane cross-linking agent, applied in the direction of plastic/resin/wax insulators, organic insulators, etc., to achieve excellent performance, good fluidity, and convenient use

Active Publication Date: 2010-09-22
上海永进电缆(集团)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to prevent pre-crosslinking, these materials are generally divided into A component and B component materials, which are mixed during wire and cable extrusion, which increases the instability of the product.

Method used

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  • Composition of single-component silane natural cross-linking polyethylene materials and processing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1: Formulation Design

[0035] A: 100 kilograms of high-density polyethylene (commercially available 7042) resin;

[0036] B: 500 grams of silane A171 coupling agent;

[0037] C: 50 grams of 1010 antioxidant;

[0038] D: 50 grams of initiator;

[0039] E: 50 grams of catalyst mixture (condensation catalyst formed by mixing dibutyltin dilaurate and tin oxide at a weight ratio of 2:1).

[0040] Put A, C, D, and E into a high-speed mixing mixer and stir evenly at a temperature of 60-80°C, at a speed of 100-200rpm, and mix for 180 seconds.

[0041] Step 2: Processing

[0042] Control the temperature of each heating section of the twin-screw extruder at 140°C, 150°C, 170°C, and 190°C, add the mixed material in step 1, complete one-time processing, and pelletize after extrusion with water cooling. 3-5mm.

[0043] Step 3: Silane Grafting

[0044] Put B and the pellets processed in step 2 into a high-speed mixer and stir evenly at a temperature of 60-80°C and a rota...

Embodiment 2

[0051] Step 1: Formulation Design

[0052] A: 80 kg of high-density polyethylene, 20 kg of linear low-density polyethylene;

[0053] B: 1000 grams of silane A171 coupling agent;

[0054] C: 80 grams of 1010 antioxidant;

[0055] D: 80 grams of initiator;

[0056] E: 80 grams of catalyst mixture (a condensation catalyst formed by mixing dibutyltin dilaurate and tin oxide in a weight ratio of 3:1).

[0057] Put A, C, D, and E into a high-speed mixing mixer and stir evenly at a temperature of 60-80°C, at a speed of 100-200rpm, and mix for 180 seconds.

[0058] Step 2: Processing

[0059] Control the temperature of each heating section of the twin-screw extruder at 140°C, 150°C, 170°C, and 190°C, add the mixed material in step 1, complete one-time processing, and pelletize after extrusion with water cooling. 3-5mm.

[0060] Step 3: Silane Grafting

[0061] Put B and the pellets processed in step 2 into a high-speed mixer and stir evenly at a temperature of 60-80°C and a rot...

Embodiment 3

[0068] Step 1: Formulation Design

[0069] A: 50 kg of high-density polyethylene, 50 kg of linear low-density polyethylene;

[0070] B: 1500 grams of silane A151 coupling agent;

[0071] C: 100 grams of 1010 antioxidant;

[0072] D: 90 grams of initiator;

[0073] E: 120 grams of catalyst mixture (condensation catalyst formed by mixing dibutyltin dilaurate and zinc oxide in a weight ratio of 4:1).

[0074] Put A, C, D, and E into a high-speed mixing mixer and stir evenly at a temperature of 60-80°C, at a speed of 100-200rpm, and mix for 180 seconds.

[0075] Step 2: Processing

[0076] Control the temperature of each heating section of the twin-screw extruder at 140°C, 150°C, 170°C, and 190°C, add the mixed material in step 1, complete one-time processing, and pelletize after extrusion with water cooling. 3-5mm.

[0077] Step 3: Silane Grafting

[0078] Put B and the pellets processed in step 2 into a high-speed mixer and stir evenly at a temperature of 60-80°C and a ro...

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Abstract

The invention relates to the field of application of silane natural cross-linking polyethylene materials, in particular to a composition of single-component silane natural cross-linking polyethylene materials and a processing process thereof. The composition comprises polyethylene resin, silane cross-linking agents, antioxidizers, initiators and catalyst mixtures. The processing process comprises the following steps: using the polyethylene resin as base materials; adding the silane cross-linking agents, and adding proper antioxidizers, initiators and catalyst mixtures to be mixed and stirred; and adopting a double-screw extruding machine for fused plasticized mixed filtering granulation for preparing the silane natural cross-linking polyethylene materials. The invention adopts a one-step method granulation process, the polyethylene rein is made into products through the fused plasticized mixed filtering granulation via the screw extruding machine under the effect of the silane cross-linking agents, antioxidizers, initiators and catalyst mixtures, the products are single-component materials, and materials A and materials B are not needed to be distinguished. The materials have good flowability, high extrusion speed and long storage time, no pre-cross-linking phenomenon occurs in the technical processing process, the technical temperature range is wide, the use is convenient, and the invention is applicable to industries such as electric wires and cables, plastic products and the like.

Description

technical field [0001] The invention relates to the application field of silane cross-linked polyethylene materials, in particular to the composition and processing technology of a single-component silane natural cross-linked polyethylene material, which is used as an insulating material for wires and cables with good fluidity, fast extrusion speed, and easy storage. It has the characteristics of long time, no pre-crosslinking phenomenon in the process of processing, wide range of process temperature, and convenient use. It is suitable for wire and cable, plastic products and other industries. It can replace PVC insulating materials. It is a new type of environmentally friendly functional material. Background technique [0002] At present, most low-voltage cables (wires) in China are covered with polyvinyl chloride, which will emit suffocating gas and smoke in the event of a short circuit or fire, endangering human life. Some foreign polyvinyl chloride cables have been repla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K5/54C08J3/24H01B3/44
Inventor 张军衣庆晖丛卫军
Owner 上海永进电缆(集团)有限公司
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