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A trenchless, pipe technology, used in rigid pipes, pipes, pipes/pipe joints/fittings, etc., can solve the problems of not being able to meet the harsh applications of trenchless buried, pipe breaking, low notch impact strength, etc.
Active Publication Date: 2012-08-29
公元管道(上海)有限公司
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Abstract
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Problems solved by technology
However, the HDPE pipes of the current technology also have the disadvantage of poor toughness (especially low notched impact strength), which cannot well meet the harsh application of non-excavation buried
[0004] Especially in ultra-long-distance non-excavation traction construction, and when the underg
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0042] PE100 pipe special material 75%,
[0043] HDPE pipe recycling 10%,
[0044] mLLDPE 5%,
[0045] Petroleum resin 2%,
[0046] black female 5%,
[0047] Processing aid 1.5%,
[0048] Modification additive 1.5%.
Embodiment 2
[0050] PE100 pipe special material 60%,
[0051] HDPE pipe recycling 15%,
[0052] mLLDPE 15%,
[0053] Petroleum resin 5%,
[0054] Black mother 0.5%,
[0055] Processing aid 2%,
[0056] Modification additive 2.5%.
Embodiment 3
[0058] PE100 pipe special material 80%,
[0059] HDPE pipe recycling 5%,
[0060] mLLDPE 10%,
[0061] Petroleum resin 1%,
[0062]Black female 1%,
[0063] Processing aid 2%,
[0064] Modification additive 1%.
[0065] Accurately weigh each component according to the formula requirements of the above-mentioned Examples 1-3, and add the weighed components into the mixer. Dehumidification, plasticizing extrusion, molding, vacuum sizing, spray cooling, and cutting to length to obtain pipes.
[0066] The following table is the detection data of embodiment 1-3 gained pipe:
[0067] project
[0068] Elongation at break, %
[0069] It can be seen from the above table that the tensile strength of the improved pipe has only a small decrease, but the impact strength of the pipe has increased significantly, and the toughness has been improved. And the non-excavation traction construction when the underground environment is complex and the pipes need to bypass...
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Abstract
The invention aims to disclose a toughness-improved HDPE (High-Density Polyethylene) trenchless tubular product, which comprises the following components in percentage by weight: 60-80 percent of PE100 pipeline special material, 5-15 percent of recovered HDPE tubular product, 5-15 percent of mLLDPE (metallocene Linear Low Density Polyethylene), 1-5 percent of petroleum resin, 0-5 percent of black color master batch, 1-3 percent of processing aid and 1-3 percent of modifying aid. The tubular product is obtained by accurately weighing the components, mixing uniformly, drying, dehumidifying, plasticizing, extruding, performing compression molding, sizing in vacuum, spraying, cooling and cutting at a fixed length. The tubular product has very high flexibility, and is particularly suitable for super long-distance trenchless traction construction and trenchless traction construction in which an underground environment is complex and the tubular product is required to be wound on a barrier; and the aims of the tubular products are fulfilled.
Description
technical field [0001] The invention relates to a plastic pipe, in particular to a HDPE non-excavation pipe with improved toughness. Background technique [0002] Trenchless underground pipeline construction refers to the construction method of laying, replacing and repairing various underground pipelines without trenching (trough) on the surface by using various clay drilling techniques. Compared with trenchless construction, it has the advantages of no impact on traffic, no damage to the environment, short construction period, low comprehensive construction cost and obvious social benefits. [0003] In trenchless buried applications, trenchless buried pipes are required to have high toughness and strength. Currently, HDPE pipe is used in trenchless buried applications. However, the HDPE pipes of the current technology also have the disadvantage of poor toughness (especially low notched impact strength), which cannot well meet the harsh application of non-excavation burie...
Claims
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Application Information
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