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Foamable composition for electric cable

A foaming composition, wire and cable technology, applied in the direction of insulating cables, cables, circuits, etc., to achieve the effects of reducing costs, uniform distribution of cells, and saving social resources

Inactive Publication Date: 2015-06-03
SHANGHAI KAIBO SPECIAL CABLE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, polyvinyl chloride foaming materials can be used for sound-insulating floors, warm wallpapers, etc., but they are rarely used in the field of wires and cables, and due to the particularity of the field of wires and cables, polyvinyl chloride foaming materials The insulating material and sheath material not only require good foaming effect and uniform foaming, but also require specific electrical and mechanical properties, and higher requirements for its safety performance.

Method used

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  • Foamable composition for electric cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Prepare materials according to the components and contents listed in Example 1 in Table 1;

[0036] 2) Put the above components into a high-speed mixer and mix at a high speed of 2000rpm for about 3 minutes;

[0037] 3) Discharge at a low speed of 500rpm;

[0038] 4) Add the uniformly mixed components into a screw machine to extrude and granulate. The rotating speed of the extruder is 80 rpm, and the extrusion temperature is 120-180°C, so as to obtain a foamable composition for electric wires and cables.

[0039] The temperature setting of the screw extruder in the above step 4) is: 120-140°C in the first zone of the barrel, 130-150°C in the second zone of the barrel, 140-160°C in the third zone of the barrel, 150-170°C in the fourth zone of the barrel , barrel five zone 160-180 ℃, head and mold 160-180 ℃.

[0040] The degree of polymerization of polyethylene described in Example 1 in Table 1 is 1000, the plasticizer is dioctyl terephthalate, the stabilizer is CZ20...

Embodiment 2

[0042] 1) Prepare materials according to the components and contents listed in Example 2 in Table 1;

[0043] 2) Put the above components into a high-speed mixer and mix at a high speed of 2000rpm for about 3 minutes;

[0044] 3) Discharge at a low speed of 500rpm;

[0045] 4) Add the uniformly mixed components into a screw machine to extrude and granulate. The rotating speed of the extruder is 20 rpm, and the extrusion temperature is 120-180°C, so as to prepare a foamable composition for wire and cable.

[0046] The temperature setting of the screw extruder in the above step 4) is: 120-140°C in the first zone of the barrel, 130-150°C in the second zone of the barrel, 140-160°C in the third zone of the barrel, 150-170°C in the fourth zone of the barrel , barrel five zone 160-180 ℃, head and mold 160-180 ℃.

[0047] The degree of polymerization of polyethylene described in Example 2 of Table 1 is 1000, the plasticizer is dioctyl terephthalate, the stabilizer is CZ200 calcium / ...

Embodiment 3

[0049] 1) Prepare materials according to the components and contents listed in Example 3 in Table 1;

[0050] 2) Put the above components into a high-speed mixer and mix at a high speed of 2000rpm for about 3 minutes;

[0051] 3) Discharge at a low speed of 500rpm;

[0052] 4) Put the uniformly mixed components into the screw machine to extrude and granulate. The speed of the extruder is 20-80 rpm, and the extrusion temperature is 120-180°C, so as to obtain a foamable combination for wire and cable. thing.

[0053] The temperature setting of the screw extruder in the above step 4) is: 120-140°C in the first zone of the barrel, 130-150°C in the second zone of the barrel, 140-160°C in the third zone of the barrel, 150-170°C in the fourth zone of the barrel , barrel five zone 160-180 ℃, head and mold 160-180 ℃.

[0054] The degree of polymerization of the polyethylene described in Example 3 in Table 1 is 1000, the plasticizer is dioctyl terephthalate, the stabilizer is CZ200 c...

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Abstract

The invention discloses a foamable composition for an electric cable. The foamable composition comprises the following components in parts by weight: polyvinyl chloride, a foaming agent, a stabilizer, a plasticizer, filler, an antioxidant and a lubricating agent, wherein the components are mixed by a high-speed mixer, discharged and then extruded by a screw extruder to obtain the foamable composition. The electric cable prepared from the foamable composition is uniform in foam hole distribution by adopting a foamed polymer material, satisfies the required specifications of the electric cable in electric performance and mechanical properties and can save more than 10% of used materials in comparison with an unfoamed material, so the cost is effectively lowered and social resources are saved.

Description

technical field [0001] The invention relates to a foamable composition for wires and cables, in particular to a foamable composition especially suitable for insulating materials and sheath materials in the field of wires and cables. technical background [0002] With the development of social economy and the needs of urban and rural construction, wires and cables are widely used in various fields such as communications, transportation, and automobiles. At present, wire and cable has become the second largest industry in China besides automobiles, and there are thousands of cable factories in China. However, although there are many domestic cable factories, the technical content is not high, the malicious price competition is extremely fierce, and there are even many unqualified cables. The main reason is the lack of insulating and sheathing materials for wires and cables that meet the requirements of national standards and are competitive in cost. [0003] Polyvinyl chlori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/02C08K3/26C08K3/34C08K5/12C08K5/11C08K5/13C08K5/524H01B3/44H01B7/17C08J9/10B29C47/92B29C48/92
CPCC08L27/06B29C48/92B29C2948/92704C08J9/103C08J2203/04C08J2327/06C08L2203/202H01B3/443H01B7/18C08L23/06C08K13/02C08K2003/265C08K5/12C08K5/09C08K5/098C08K5/13C08K5/11
Inventor 段春来沈长勇
Owner SHANGHAI KAIBO SPECIAL CABLE FACTORY
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