Polyvinyl chloride single-wall corrugated pipe used for buildings and preparation method of polyvinyl chloride single-wall corrugated pipe

A technology of single-wall corrugated pipe and polyvinyl chloride, which is applied in the field of chemical building materials, can solve the problems of increasing the cost of polyethylene single-wall corrugated pipe, and achieve the effect of improving flame retardant and smoke suppression performance, and good flame retardant and smoke suppression

Active Publication Date: 2015-11-25
湖南联塑科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Commercially available single-wall corrugated pipes for construction are mostly made of polyethylene (PE). The unit price of PE plastic is more than 50% higher than that of PVC plastic. In addition, PE plastic is easy to burn, so a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example

[0035] Examples 1~4

[0036] Weigh the raw materials according to the ratio in Table 1, and then put them into the hot mixing tank of the high-speed mixing unit in batches. After the high-speed mixing is started, the hot mixing tank will be discharged into the cold mixing tank when the temperature reaches 120~130℃. Cool, stop stirring when the temperature of the cold mixing tank drops to 45°C. The material cooled to 45°C is added to the extruder for plasticization, and the DN20 single-wall corrugated tube is molded into a DN20 single-wall corrugated pipe; among them, the extruder is a conical twin-screw extruder, and the temperature of the barrel is set at 155~185°C. The molding temperature is set at 155~200℃.

[0037] Table 1:

[0038] 。

Example

[0039] Comparative examples 1-11

[0040] Weigh the raw materials according to the ratio shown in Table 2 and put them into the hot mixing tank of the high-speed mixing unit in batches. After starting high-speed mixing, they will be discharged into the cold mixing tank when the temperature of the hot mixing tank reaches 120~130℃. Cool, stop stirring when the temperature of the cold mixing tank drops to 45°C. The material cooled to 45°C is added to the extruder for plasticization, and the DN20 single-wall corrugated tube is molded into a DN20 single-wall corrugated pipe; among them, the extruder is a conical twin-screw extruder, and the temperature of the barrel is set at 155~185°C. The molding temperature is set at 155~200℃.

[0041] Table 2:

[0042] .

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PUM

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Abstract

The invention aims at providing a polyvinyl chloride single-wall corrugated pipe used for buildings. The polyvinyl chloride single-wall corrugated pipe is composed of, by weight, 100 parts of polyvinyl chloride resin, 2-20 parts of light calcium carbonate, 2-6 parts of heat stabilizer, 1-8 parts of impact modifier, 0.3-3 parts of processing agents, 0-3 parts of lubricant, 2-12 parts of additive flame retardant and 0.1-3 parts of pigment. The additive flame retardant is composed of two types of fire retardant including zinc borate and ammonium octamolybdate according to the mass ratio of 1-7 to 1-5. The average particle size of zinc borate is smaller than or equal to 5 micrometers. The average particle size of ammonium octamolybdate is smaller than or equal to 2 micrometers. The excellent flame retardant and smoke suppression performance can be achieved by only adding a small amount of fire retardant, and the influences on mechanical performance such as impact resistance of the polyvinyl chloride single-wall corrugated pipe are small.

Description

technical field [0001] The invention relates to the technical field of chemical building materials, in particular to a polyvinyl chloride single-wall corrugated pipe for construction and a preparation method thereof. Background technique [0002] Commercially available single-wall corrugated pipes for construction are mostly made of polyethylene (PE). The unit price of PE plastic is more than 50% higher than that of PVC plastic. In addition, PE plastic is easy to burn, so a large amount of flame retardant needs to be added. This further pushes up the cost of PVC single-wall corrugated pipes, so the use of PVC single-wall corrugated pipes in the construction field has significant economic significance. [0003] When polyvinyl chloride single-wall corrugated pipes are used for wire sheathing pipes inside buildings, the advantages of polyvinyl chloride (PVC) plastics such as insulation, flame retardancy, corrosion resistance, and low price make the performance of such pipes com...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08K13/02C08K3/26C08K3/38C08K3/28
Inventor 李支松宋科明
Owner 湖南联塑科技实业有限公司
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