Microcellular-foaming high-strength anti-aging PA/PETG composite plastic well lid and preparation method thereof

Abstract

The invention discloses a microcellular-foaming high-strength anti-aging PA / PETG composite plastic well lid and a preparation method thereof. According to the invention, a PPA / PETG composite materialis used as matrix resin, an anti-aging composite foaming agent, namely an embedded halloysite nanotube surface loaded with TiO2 and a reinforcing material, namely a dendritic calcium carbonate whiskermaterial are added, the special tubular structure of halloysite is utilized, a p-toluenesulfonylaminourea foaming agent is embedded into the inner wall of the nanotube, and TiO2 with an excellent ultraviolet shielding function is loaded on the surface of the nanotube, so uniform foaming in the well lid can be realized, the weight of the well lid is effectively reduced, and the ageing resistance of the well lid can also be improved; and crystalline flake graphite is used as a matrix template, calcium carbonate whiskers are synthesized through a liquid phase reaction method and attached to thesurface of crystalline flake graphite to form the dendritic structure reinforcing material, reinforcing effect on the well lid is achieved by means of anisotropy of the calcium carbonate whiskers on the surface of the crystalline flake graphite, interlayer slippage of the crystalline flake graphite and other characteristics, and the defect that the strength of the well lid is reduced due to foaming is overcome.

Description

technical field [0001] The invention relates to a composite plastic manhole cover and a preparation method thereof, in particular to a microporous foamed high-strength anti-aging PPA / PETG composite plastic manhole cover and a preparation method thereof. Background technique [0002] In recent years, with the development of urbanization and the increase of national infrastructure investment and construction, no matter it is a big city, a small city or a village, as long as there are public facilities such as water supply system, drainage system, power supply system and communication system, It is necessary to install inspection wells. According to statistics, the number of newly added and replaced manhole covers in the country is at least 10 million per year. [0003] Traditional manhole covers mainly include cast iron manhole covers, cement manhole covers, fiberglass manhole covers, and resin composite manhole covers. Although cast iron manhole covers have high strength and ...

AI Technical Summary

Problems solved by technology

[0003] Traditional manhole covers mainly include cast iron manhole covers, cement manhole covers, fiberglass manhole covers, and resin composite manhole covers. Although cast iron manhole covers have high strength and long-lasting use, they are relatively brittle and easy to be crushed or even broken. The production cycle is long, and the beating noise is large when used, and it is easy to be stolen. After the theft, traffic and personal insurance accidents are very likely to occur; the cement manhole cover must be made very thick to achieve strength, and it is difficult to open, so the manhole cover is often stuck. It is brittle and easy to break; FRP manhole cover has good anti-theft performance and is more beautiful, but its anti-ultraviolet radiation ability is poor, it is easy to decompose, and the coefficient of thermal expansion and contraction is not synchronized with the road, the durability is short, the compression resistance is poor, and the material is brittle Very large and easy to break; the resin manhole cover has low strength and insufficient bearing capacity, which can only meet the minimum level requirements of the manhole cover standard, and is prone to aging and creep;

[0004] Polyphthalamide (PPA for short) is a semi-aromatic polyamide made of terephthalic acid or phthalic acid. It is a semi-crystalline thermoplastic aromatic polyamide with high rigidity and high heat resistance. , high strength and excellent electrical properties, etc., but because of its high temperature resistance, its fluidity is poor, making processing more difficult

Images