A kind of high partial discharge voltage solar battery back plate base film and preparation method thereof

Abstract

The invention discloses a high partial discharge voltage solar battery back board base film and a preparation method of the high partial discharge voltage solar battery back board base film. The high partial discharge voltage solar battery back board base film is characterized by consisting of an A-layer polyester film which has a high partial discharge voltage function and a B-layer polyester film which has a hydrolysis resisting function in a compounding way. The preparation method is characterized in that the A-layer polyester film and the B-layer polyester film can be extruded in a layered co-extrusion way by a resin melt distributor after being respectively molten through an extruder under 260 to 290 DEG C according to (400 to 900) : 100 of a mass ratio of the A-layer polyester film and the B-layer polyester film, sheet casting can be carried out on a cold drum of which the temperature is 15 to 25 DEG C, then 2.9 to 3.5 times of longitudinal stretching and 3.0 to 3.5 times of transverse two-way stretching can be carried out, heat setting can be carried out under 190 to 230 DEG C, and then the high partial discharge voltage solar battery back board base film of which the thickness is 100 mum to 350 mum can be obtained. According to the high partial discharge voltage solar battery back board base film disclosed by the invention, the partial discharge voltage of the high partial discharge voltage solar battery back board base film is 800 to 1800 V; the good performance of the partial discharge voltage, the long-term UV (Ultra Violet) resistance and the like can be obtained; the high partial discharge voltage solar battery back board base film is applied to manufacturing of solar photovoltaic battery back board materials.

Description

technical field [0001] The invention belongs to a functional thin film made of polyester and its preparation, and relates to a high partial discharge voltage solar cell back plate base film and a preparation method thereof. The high partial discharge voltage solar battery backplane base film of the invention is suitable for the manufacture of solar photovoltaic battery backplane materials. Background technique [0002] In recent years, with the improvement of the voltage level of power equipment and the wide application of various organic insulating materials, the problem of partial discharge (referred to as PD) of power equipment has become more and more prominent. Partial discharge will gradually corrode and damage the insulating material, and the discharge area will continue to expand, eventually leading to the breakdown of the entire insulator. Therefore, it is very important to study the partial discharge of the solar battery backplane base film; in the prior art, the ...

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Problems solved by technology

[0003] Regardless of the blending or foaming technology of the third material, although the partial discharge performance of the solar backplane PET polyester base film is improved to a certain extent (the partial discharge voltage of the solar backplane PET backplane base film with a thickness of 250 μm reaches 1100V ), but it is far from enough to require a higher partial discharge voltage for the solar backplane PET polyester base film (the partial discharge voltage of the solar backplane PET backplane base film with a thickness of 250 μm reaches 1500V)

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