Preparation method of polyvinylidene fluoride film for super-weather-proof photovoltaic module

Abstract

The invention relates to a preparation method of a polyvinylidene fluoride film for a super-weather-proof photovoltaic module, and belongs to the technical field of PVDF film preparation processes. The method comprises the following steps that the pelleted raw materials are fed to a drying hopper device, a stainless steel material is used in the hopper lining; the raw materials enter the extrudingmachine through a feeding port, the extruding machine adopts a special screw rod structure, and the PVDF material is plasticized and extruded to form a thin-film with few crystal points; a special flow channel design and pressure distribution are made on the mold for the PVDF material, discharging gaps of the mold are automatically adjusted according to the feedback of a computer, so that the thickness of the thin film is uniform, the forming quality of the PVDF thin film is ensured; the forming process route comprises the steps of plastifying, melting, homogenizing, flat-mold extruding and stretching; an X-ray thickness gauge is adopted to detect; on-line detecting is adopted; the performance of the thin films are homogenized by adopting a plurality of aluminum guide roller; full-automatic winding is carried out. According to the method, the process is stable, the yield of finished products is high, the productivity is improved, and the cost is saved; the weather resistance and the ultraviolet aging resistance are greatly improved, and the thickness consistency is high.

Description

technical field

[0001] The invention relates to a preparation method of a polyvinylidene fluoride film for a super weather-resistant photovoltaic module, and belongs to the technical field of PVDF film preparation technology. Background technique

[0002] PVDF membrane (polyvinylidene fluoride) is a solid support commonly used in Western blotting. PVDF membrane is hydrophobic, and the membrane pore size varies. As the membrane pore size decreases, the membrane binds to low-molecular-weight proteins more firmly. For proteins larger than 20,000, use a 0.45um membrane, and for proteins less than 20,000, use a 0.2um membrane. The PVDF membrane needs to be pretreated before use. The purpose of methanol treatment is to activate the positively charged groups on the membrane, making it easier to combine with negatively charged proteins. PVDF membrane has high mechanical strength and is an ideal solid support material in blotting.

[0003] The production process of domestic PVDF f...

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