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Cable fillers

A cable filling and plastic technology, used in insulated cables, cable/conductor manufacturing, cables, etc., can solve problems such as the inability to ensure the roundness of the cable, the inability to fully fill the cable gap, and the inability to fit the cable cores. The effect of ensuring roundness, saving process and raw materials, and shortening production cycle

Active Publication Date: 2010-08-18
四川新蓉电缆有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (A) The surface is rough and the size and specification are uneven, which cannot fully fill the cable gap and ensure the roundness of the appearance of the cable when it is cabled;
[0009] (B) The tensile strength is small, and it is easy to break when cabled and filled, which affects the production speed;
[0010] (C) heavy and inconvenient to operate;
[0011] (D) It is easy to absorb moisture during storage, which brings hidden dangers to the quality of the product
[0012] 2. Polypropylene (PP) mesh filling rope: the filling strip is made of polypropylene (PP) mesh multi-strand polymerization. Since the filling gap of the medium-voltage cable is large, it needs to be composed of multiple strands of PP filling rope. Change the line It is troublesome and extremely inconvenient to operate; secondly, a large amount of calcium carbonate is added to the PP filling rope as a filler, which is heavy and costly
[0013] 3. Polyvinyl chloride or rubber tube filling strip: Since the filling strip is made of a plastic round tube, it cannot fit the cable core well, and the molding stability is poor, which brings inconvenience to the production of the cable; at the same time, it cannot Fully fill the cable gap, can not guarantee the roundness of the cable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A cable filler, characterized in that: by weight, it comprises the following components:

[0044] A) Low-density polyethylene plastic 20%;

[0045] B) High-density polyethylene plastic 50%;

[0046] C) polypropylene plastic 28.76%;

[0047] D) graphite 0.2%;

[0048] E) whipping agent 0.04%;

[0049] F) Flame retardant 1%.

[0050] The blowing agent is azodicarbonamide.

[0051] The flame retardant is a nitrogen-phosphorus intumescent flame retardant.

[0052] The method for preparing the above-mentioned cable filling strip adopts the following steps:

[0053] A) each component of raw material is mixed evenly according to proportioning, puts into extruder hopper;

[0054] B) The raw material generates a molten mixture through an extruder;

[0055] C) filling gas into the molten mixture;

[0056] D) the mixture obtained in step C) is shaped through the outer mold provided at the outlet of the extruder to obtain a cable filling strip;

[0057] E) Pass the cable ...

Embodiment 2

[0063] A cable filler, characterized in that: by weight, it comprises the following components:

[0064] A) Low-density polyethylene plastic 40%;

[0065] B) High-density polyethylene plastic 30%;

[0066] C) polypropylene plastic 27.76%;

[0067] D) graphite 0.2%;

[0068] E) whipping agent 0.04%;

[0069] F) Flame retardant 2%.

[0070] The blowing agent is azodicarbonamide.

[0071] The flame retardant is a nitrogen-phosphorus intumescent flame retardant.

[0072] The method for preparing the above-mentioned cable filling strip adopts the following steps:

[0073] A) each component of raw material is mixed evenly according to proportioning, puts into extruder hopper;

[0074] B) The raw material generates a molten mixture through an extruder;

[0075] C) filling gas into the molten mixture;

[0076] D) the mixture obtained in step C) is shaped through the outer mold provided at the outlet of the extruder to obtain a cable filling strip;

[0077]E) Pass the cable f...

Embodiment 3

[0083] A cable filler, characterized in that: by weight, it comprises the following components:

[0084] A) Low-density polyethylene plastic 30%;

[0085] B) High-density polyethylene plastic 40%;

[0086] C) polypropylene plastic 27.76%;

[0087] D) graphite 0.2%;

[0088] E) whipping agent 0.04%;

[0089] F) Flame retardant 2%.

[0090] The blowing agent is azodicarbonamide.

[0091] The flame retardant is a nitrogen-phosphorus intumescent flame retardant.

[0092] The method for preparing the above-mentioned cable filling strip adopts the following steps:

[0093] A) each component of raw material is mixed evenly according to proportioning, puts into extruder hopper;

[0094] B) The raw material generates a molten mixture through an extruder;

[0095] C) filling gas into the molten mixture;

[0096] D) the mixture obtained in step C) is shaped through the outer mold provided at the outlet of the extruder to obtain a cable filling strip;

[0097] E) Pass the cable ...

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PUM

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Abstract

The invention relates to cable fillers, belonging to fillers in a cable. The cable fillers comprise the components of low density polyethylene plastics, high density polyethylene plastics, polypropylene plastics, graphite, foaming agent and fire retardant. The cable filler strip prepared by the cable filter in the invention has stable molding, fills cable gaps fully, ensures round appearance of the cable when the cable is formed, and has the advantages of high mechanical strength, good surface tightness, watertightness, moisture resistance, difficult fracture, small density, good flame retardant property, economy and practicability and the like.

Description

technical field [0001] The invention relates to the field of cables, in particular to a filler in cables. Background technique [0002] There are three main types of traditional medium voltage cable filler strips currently on the market: [0003] 1) Fan-shaped filler strips extruded from cross-linked polyethylene waste; [0004] 2) Polypropylene (PP) mesh filled rope; [0005] 3) PVC or rubber tube filler strips. [0006] Due to their material, formula or shape, the performance of these filling strips is not satisfactory, and there are always more or less defects, which are described below: [0007] 1. Fan-shaped filling strip extruded from cross-linked polyethylene waste: the filling strip is made of crushed cross-linked polyethylene waste pellets as the base material, and is extruded by adding adhesives, fillers, and coloring materials. Since cross-linked polyethylene is a thermosetting plastic, its recycled waste has poor meltability during secondary processing, and a...

Claims

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Application Information

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IPC IPC(8): H01B7/295H01B7/285H01B3/44H01B13/00C08L23/06C08L23/08C08L23/12C08K13/02C08K3/04C08J9/12
Inventor 陈尔金赵保森孙正兵姚鸣李晓红霍帅营周胜
Owner 四川新蓉电缆有限责任公司
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