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High-performance high-density polyethylene (HDPE) pipe fitting

A high-performance, pipe technology, used in rigid pipes, hoses, pipes, etc., can solve the problems of untreated clean, insufficient weld strength, insufficient butt area requirements, etc.

Inactive Publication Date: 2013-10-23
李胜春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 5. When the hot-melt butt joint is connected, the voltage is required to be between 200 and 220V. If the voltage is too high, the temperature of the heating plate will be too high, and the voltage is too low, and the docking machine will not work normally; when docking, keep the docking interface aligned, otherwise It will cause insufficient butt joint area, insufficient welding joint strength, and misaligned curling; the pipe joints are not cleaned when the heating plate is heated, or there are oil, sediment and other impurities on the heating plate, which will cause the joint to be disengaged and leak; heating time It should be well controlled, the heating time is short, and the heat absorption time of the pipe is not enough, which will cause the welding seam to be too small, and the heating time is too long, which will cause the welding seam to be too large, and may form a virtual weld

Method used

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  • High-performance high-density polyethylene (HDPE) pipe fitting
  • High-performance high-density polyethylene (HDPE) pipe fitting
  • High-performance high-density polyethylene (HDPE) pipe fitting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] A high-performance HDPE pipe, the mass percentage of its raw material components is:

[0078] Functional masterbatch 0.1%

[0079] HDPE base material 99.9%

[0080] A high-performance HDPE pipe preparation method, characterized in that raw materials→mixing→vacuum feeding→raw material drying→inner layer extruder→outer layer extruder→sizing sleeve→spraying vacuum calibrating box→spraying Cooling water tank → inkjet printer → crawler tractor → finished product testing and packaging HDPE pipe specifications;

[0081] A functional masterbatch, the mass percentage of its raw material components is:

[0082]

[0083] The invention relates to a preparation method of a functional master batch, which comprises mixing and granulating raw materials to obtain the functional master batch.

Embodiment 2～5

[0085] Table 1 is the mass percentage of raw material components of high-performance HDPE pipes

[0086] Component Example 2 Example 3 Example 4 Example 5 Functional Masterbatch 0.3％ 0.5％ 0.7％ 1％ HDPE base material 99.7％ 99.5％ 99.3％ 99％

[0087] Table 2 is the mass percentage of raw material components of functional masterbatch

[0088] Component Example 2 Example 3 Example 4 Example 5 nano silver material 0.2％ 0.3％ 0.4 0.5 Nano Magnesium Hydroxide 0.2％ 0.3％ 0，4 0.5 Nano-selenium material 0.2％ 0.3％ 0.4 0.5 Modified functional particles 0.3％ 0.5％ 0.7％ 1％ HDPE base material 99.1％ 98.6％ 98.1％ 97.5％

[0089] All preparation methods of embodiment 2~5 are the same as embodiment 1.

Embodiment 6

[0091] A high-performance HDPE double-wall corrugated pipe, the mass percentage of its raw material components is:

[0092] Functional masterbatch 1%

[0093] HDPE base material 99%

[0094] A method for preparing a high-performance HDPE double-wall corrugated pipe, characterized in that the functional masterbatch and the HDPE base material are mixed, and the inner layer extruder and the outer layer extruder are respectively used for co-extrusion and compounding. Forming, cooling and setting, traction cutting and flaring to obtain high-performance HDPE double-wall corrugated pipes. The specific molding process conditions are: barrel temperature 170-190°C, head temperature 190-210°C, main engine speed 628r / min, auxiliary machine speed 520r / min; air pressure inside the flare 14kPa, module vacuum 0.050-0.075MPa; air pressure outside the flare 10kPa, jacket water pressure 0.25MPa, head vacuum 0.04~0.05kPa.

[0095] A functional masterbatch, the mass percentage of its raw materi...

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Abstract

The invention relates to a high-performance high-density polyethylene (HDPE) pipe fitting which consists of functional master batches and an HDPE base material. A preparation method is characterized by comprising the following steps of: selecting raw materials, mixing the raw materials, feeding the raw materials under vacuum, drying the raw materials, extruding the raw materials by an inner layer extruder, extruding the raw materials by an outer layer extruder, fixing the diameter by a diameter fixing sleeve, spraying a vacuum sizing box, spraying a cooling water tank, spraying codes by a code sprayer, conveying a product by a caterpillar-tractor, packaging finished products, and detecting the specifications of the HDPE pipe fittings. The HDPE pipe fitting can be produced by using existing equipment and a production technology; the additional value of the products can be increased; the HDPE pipe fitting can be widely applied.

Description

【Technical field】 [0001] The invention relates to the technical field of pipes, in particular to a high-performance HDPE pipe. 【Background technique】 [0002] HDPE is a highly crystalline, non-polar thermoplastic resin. The appearance of the original HDPE is milky white, and the thin section is translucent to a certain extent. PE has excellent resistance to most domestic and industrial chemicals. Certain classes of chemicals can cause chemical corrosion, such as corrosive oxidizers (concentrated nitric acid), aromatic hydrocarbons (xylene) and halogenated hydrocarbons (carbon tetrachloride). The polymer is non-hygroscopic and has good water vapor resistance for packaging purposes. HDPE has good electrical properties, especially the high dielectric strength of the insulation, making it very suitable for wires and cables. Medium to high molecular weight grades have excellent impact resistance at room temperature or even down to -40F. [0003] High-density polyethylene is ...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K13/02C08K3/08C08K3/04C08K3/22C08K3/02C08K5/523F16L9/12F16L11/00
Inventor 李胜春肖凯初
Owner 李胜春
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