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hdpe double wall corrugated pipe and its production process

A technology of double-wall bellows and carbon nanotubes, which is applied in the field of bellows, can solve the problems of poor ring stiffness and creep resistance of pipes, poor ring stiffness and creep resistance, and affect the service life of products, so as to improve performance Inhomogeneity, enhanced ring stiffness and creep resistance, antistatic long-lasting effect

Active Publication Date: 2021-07-20
陕西飞天管业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] HDPE double-wall corrugated pipe has obvious advantages in low temperature toughness, but due to the characteristics of PE material, its rigidity is worse than that of cement pipe, and the ring stiffness and creep resistance of the pipe are worse than that of PVC pipe. During long-term use, it is easy to be affected by gravity. Deformation, affecting the service life of the product
[0004] Therefore, it is urgent to develop a bellows that can improve the ring stiffness and creep resistance of the PE material itself to meet broader needs.

Method used

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  • hdpe double wall corrugated pipe and its production process
  • hdpe double wall corrugated pipe and its production process

Examples

Experimental program
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Effect test

Embodiment 1

[0045] HDPE double-wall corrugated pipe, including the following components by weight, 120kg HDPE, 120kg polypropylene, 4kg talcum powder, 20kg antistatic masterbatch, 50kg impact-resistant modified masterbatch, 10kg coupling agent, 10kg EPDM Rubber, 4kg carbon nanotubes, 10kg color masterbatch.

[0046] The production process of HDPE double corrugated pipe includes the following preparation process:

[0047] Step 1: Weigh the raw materials according to the parts by weight, stir and mix them uniformly to obtain the raw material mixture;

[0048] Step 2: The raw material mixture is melted and extruded by a twin-screw extruder and molded to obtain the initial product. The temperature of the first stage of the twin-screw extrusion process is controlled at 80-100°C, and the temperature of the second stage to the sixth stage is controlled At 175-200°C;

[0049] Step 3: After the initial product is pulled up, it is cut according to the specification to obtain the intermediate prod...

Embodiment 2

[0056] The difference between Example 2 and Example 1 lies in the content of each component, see Table 1 for specific components.

Embodiment 3

[0058] The difference between Example 3 and Example 1 lies in the difference in the content of each component and the difference in preparation parameters, see Table 1 for specific components.

[0059] Choose 52% isopropanol aqueous solution in the antistatic masterbatch. The drying temperature was 44°C.

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Abstract

The invention relates to a HDPE double-wall corrugated pipe and its production process. The double-wall corrugated pipe includes the following components in parts by weight: HDPE, polypropylene, talcum powder, antistatic masterbatch, impact-resistant modified masterbatch, Coupling agent, EPDM rubber, carbon nanotubes, color masterbatch. The preparation steps include: Step 1: Weigh the raw materials according to the parts by weight, stir and mix them evenly to obtain a raw material mixture; Step 2: melt the raw material mixture, extrude it through a twin-screw extruder, and mold it to obtain a primary product; Step 3: Preliminary After the product is pulled up, it is cut according to the specifications to obtain an intermediate product; step 4: the intermediate product is flared to obtain a double-wall corrugated pipe. The present invention overcomes existing deficiencies by adding polypropylene, impact-resistant modified master batches, EPDM rubber and carbon nanotubes, and enhances the ring stiffness and creep resistance of the bellows.

Description

technical field [0001] The invention relates to the technical field of bellows, in particular to an HDPE double-wall bellows and a production process thereof. Background technique [0002] At present, municipal sewage pipelines include new types of pipelines such as cement culvert pipes, HDPE double-wall corrugated pipes, and vacuum wound pipes. Cement pipes have been gradually replaced by plastic pipes. HDPE double-wall corrugated pipes are widely used in the current market for related municipal sewage pipelines. [0003] HDPE double-wall corrugated pipe has obvious advantages in low temperature toughness, but due to the characteristics of PE material, its rigidity is worse than that of cement pipe, and the ring stiffness and creep resistance of the pipe are worse than that of PVC pipe. During long-term use, it is easy to be affected by gravity. Deformation will affect the service life of the product. [0004] Therefore, it is urgent to develop a bellows that can improve t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/12C08L23/16C08L23/08C08K3/34C08K3/04C08K3/26C08K5/10C08K13/02B29C48/10B29C48/00B29C57/02B29L23/00
Inventor 王颐其
Owner 陕西飞天管业科技有限公司