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A high-strength, creep-resistant municipal inspection manhole cover and its preparation method

A creep-resistant, inspection well technology, applied in polymer-based municipal inspection manhole covers, creep-resistant municipal inspection manhole covers, and polyethylene waste plastic-based high-strength fields, can solve the problem that polymer-based municipal inspection manhole covers are not suitable for use, inspection manhole covers creep Change, check the sinking of the manhole cover and other problems, to achieve the effect of broadening the scope of use, inhibiting flow, and easy to open

Active Publication Date: 2020-02-14
FOSHAN LOKANG PLASTIC PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, during the use of polymer-based municipal inspection manhole covers, especially when the temperature is high, the vehicle is constantly rolling, and the inspection manhole cover will creep, causing the middle part of the manhole cover to sink continuously, or even fall off
This will create a huge safety hazard, so polymer-based municipal inspection manhole covers are not suitable for use on roads
[0005] At present, there are many reports on polymer-based municipal inspection manhole covers, but there are few studies on the defects of polymer-based municipal inspection manhole covers under high temperature conditions.

Method used

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  • A high-strength, creep-resistant municipal inspection manhole cover and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0038] Preparation of polyolefin grafted nanoporous inorganic filler: 1) nanoporous diatomite is placed in the plasma generating device, the power is turned on, and the discharge power is adjusted. The flow rate of the gas medium is 55mL / min, and the discharge time is 15min. 2) transfer the material obtained in step 1) to a vacuum reactor, add isobutylene and mix; 3) raise the temperature of the reactor to 150 ° C, under the protection of an inert gas, condense and reflux for 20 hours to obtain poly Isobutylene grafted nanoporous diatomaceous earth.

[0039] The mass parts of each raw material component of the high-strength, creep-resistant municipal inspection manhole cover are: 40 parts of polyethylene waste plastic, 90 parts of polyisobutylene grafted nanoporous diatomite, 5 parts of wear-resistant agent, 2.5 parts of anti-aging agent, flame retardant 3 parts of agent, 2 parts of pigment.

[0040] Preparation of municipal inspection manhole cover: 1) Stir and mix the polye...

Embodiment 2

[0044] Preparation of polyolefin-grafted nanoporous inorganic filler: 1) Nanoporous bentonite is placed in the plasma generator, the power is turned on, and the discharge power is adjusted. The flow rate of the gas medium is 45mL / min, and the discharge time is 10min. Surface treatment; 2) Transfer the substance obtained in step 1) to a vacuum reactor, add 1,3-pentadiene and mix; 3) Raise the temperature of the reactor to 150°C, and condense and reflux for 20 hours under the protection of an inert gas , that is, poly-1,3-pentadiene grafted nano-porous bentonite.

[0045] The mass parts of each raw material component of the high-strength and creep-resistant municipal inspection manhole cover are: 60 parts of polyethylene waste plastics, 80 parts of poly-1,3-pentadiene grafted nano-porous bentonite, 10 parts of wear-resistant agent, and 3 parts of anti-aging agent 1 part, 4 parts of flame retardant, 1 part of pigment.

[0046]The preparation of the municipal inspection manhole c...

Embodiment 3

[0048] Preparation of polyolefin grafted nanoporous inorganic filler: 1) nanoporous vermiculite is placed in the plasma generating device, the power is turned on, and the discharge power is adjusted. The flow rate of the gas medium is 70mL / min, and the discharge time is 10min. 2) transfer the substance obtained in step 1) to a vacuum reactor, add 4-ethylpentene and mix; 3) raise the temperature of the reactor to 300°C, and condense and reflux for 10 hours under the protection of an inert gas , That is, poly-4-ethylpentene grafted nanoporous vermiculite.

[0049] The mass parts of each raw material component of the high-strength and creep-resistant municipal inspection manhole cover are: 80 parts of polyethylene waste plastics, 60 parts of poly-4-ethylpentene grafted nanoporous vermiculite, 8 parts of wear-resistant agent, and 2 parts of anti-aging agent 5 parts, 5 parts of flame retardant, 3 parts of pigment.

[0050] The preparation of the municipal inspection manhole cover:...

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Abstract

The invention belongs to the technical field of road facilities, and particularly relates to a polyethylene waste plastic-based high-strength and creep-resistant municipal inspection manhole cover. The invention provides the high-strength and creep-resistant municipal inspection manhole cover and a preparation method thereof. The municipal inspection manhole cover comprises the following components: 40-80 parts of polyethylene waste plastic, 50-90 parts of a polyolefin-grafted nanoporous inorganic filler, 5-10 parts of a wear-resistant agent, 2-3 parts of an antiaging agent, 3-5 parts of a flame retardant and 1-3 parts of a pigment. The invention further provides the preparation method of the high-strength and creep-resistant municipal inspection manhole cover. Through modification on thenanoporous inorganic filler, polyolefin on the surface thereof and polyethylene molecules are intertwined, so that flowing of the polyethylene molecules is inhibited during high-temperature crushing,and thus the creep rate of the manhole cover is decreased or even creep is avoided; by the preparation method, the technical barrier that a polymer-based composite manhole cover in the prior art is poor in creep resistance is broken through.

Description

technical field [0001] The invention relates to a polymer-based municipal inspection manhole cover, in particular to a polyethylene waste plastic-based high-strength and creep-resistant municipal inspection manhole cover, which belongs to the technical field of road facilities. Background technique [0002] The inspection well is the entrance and exit leading to underground facilities such as tap water, drainage, telecommunications, electricity, gas, heat, fire protection, environmental sanitation and other facilities. The inspection well cover is an openable closure for the inspection well head. necessary facilities. [0003] The polymer-based municipal inspection manhole cover is an inspection manhole cover that uses polymer as the matrix material, adds reinforcing materials, etc., and is compounded by a certain process. This composite manhole cover does not have any steel or other recycled materials, so it is anti-theft. At the same time, it has excellent mechanical pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08K9/04C08K7/26
CPCC08K7/26C08K9/08C08K2201/011C08L2207/20C08L23/06
Inventor 余德辉
Owner FOSHAN LOKANG PLASTIC PROD CO LTD
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