Poly (vinylidene fluoride), abbreviated as PVDF, mainly refers to homopolymer of vinylidene fluoride or copolymer of vinylidene fluoride and other small amount of fluorinated vinyl monomers. In addition to good chemical resistance, high temperature resistance, oxidation resistance, weather resistance and radiation resistance, it also has the characteristics of fluororesin and general resin, as well as special properties such as piezoelectricity, dielectric property and weather resistance.

Making use of the lightness of the membrane structure and the special shape to make all kinds of semi closed and fully closed impossible spaces, so that they can form a whole day construction space, provide a weather proof, sun proof and other artificial environment, and have a good role in advertising signs, so it is a good choice for the reconstruction and new construction of pedestrian streets.

Bridge guardrail "refers to the guardrail set on the bridge. The longitudinal load-bearing components in the bridge guardrail can effectively prevent the out of control vehicle from crossing the bridge. According to the size of the collision load it bears, it can be divided into the primary longitudinal effective components (such as the primary beam) and the unnecessary longitudinal effective components (such as the unnecessary beam). The longitudinal non load-bearing components bearing the collision load of vehicles are not considered in the bridge guardrail.

Roadside guardrail: guardrail set outside the boundary of highway roadside construction to avoid runaway vehicles crossing the road or bumping roadside structures and other equipment.

Median barrier: a barrier set in the median of a highway to prevent runaway vehicles from crossing the median and running into the opposite lane, and to maintain the structures in the median. Membrane structure landscape

Rigid guardrail: a kind of guardrail structure that basically does not deform. Concrete guardrail is its primary representative type. It is a wall structure composed of concrete blocks of certain shape connected with each other. It absorbs collision energy by climbing up and turning after collision of runaway vehicles.

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