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Scratch-resistant high viscosity flexible photovoltaic reflective film and preparation method thereof

A scratch-resistant, reflective sticker technology, used in optics, optical components, reflective reflectors, etc., can solve the problems of low adhesion between adhesives and welding tapes, inability to make full use of sunlight, and rising production costs for reflective films. Achieve excellent scratch resistance, good reflectivity and good adhesion

Pending Publication Date: 2017-11-07
常州斯威克新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems with this type of reflective film: First, the angle between the prism ridgeline in the reflective structure and the direction of the ribbon is zero, and the direction is single. A single-oriented structure cannot take full advantage of the sun's rays
Secondly, because the surface of the reflective film adopts a single metal coating process, the structural strength and reflectance of the coating are low, and it is easy to oxidize. The price of silver and nickel metals with high reflectivity is relatively high, and the preparation cost of the reflective film will also increase.
In addition, the bonding method of the reflective film and the welding tape is EVA, PO, PP hot-melt bonding. The adhesive force of this adhesive and the welding tape is low. During the lamination stage, the reflective film is prone to fall off and displacement.

Method used

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  • Scratch-resistant high viscosity flexible photovoltaic reflective film and preparation method thereof
  • Scratch-resistant high viscosity flexible photovoltaic reflective film and preparation method thereof
  • Scratch-resistant high viscosity flexible photovoltaic reflective film and preparation method thereof

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Effect test

preparation example Construction

[0035] above as figure 1 The preparation method of the scratch-resistant high-viscosity flexible photovoltaic reflective film includes the following steps:

[0036]Step 1. Prepare the prism structure on the surface of the pressure roller through high-precision engraving equipment, and apply UV glue on the surface of the substrate layer 1 (metal sheets and inorganic particles can be added to the UV glue), and pass through the rubber roller at the same time UV curing is carried out to obtain a prism layer 3 with excellent strength;

[0037] Step 2. Metal and inorganic materials are plated on the surface of the prism by vacuum evaporation, magnetron sputtering or electroplating. The metal and inorganic materials are selected from aluminum, nickel, silicon dioxide and hafnium oxide, and the content of the latter three is controlled at 1 Within %, the surface of the prism is coated to form a coating 4;

[0038] Step 3. Pre-blend and granulate EVA, SIS and EAA resins, and then coa...

Embodiment 1

[0044] Such as figure 1 , figure 2 As shown, the scratch-resistant high-viscosity flexible photovoltaic reflective film has a four-layer structure, from top to bottom are coating layer 4, prism layer 3, substrate layer 1, hot-melt adhesive layer 2, substrate layer 1 thickness t 1 75μm, hot melt adhesive layer 2 thickness t 2 is 25 μm, and the thickness of the coating layer 4 is 50 nm. The ridge line of the prism forms an included angle of 0° with the direction of the ribbon, the distance between the ridge lines D is 50 μm, and the top angle of the prism ∠ 1 is 120°, and the section is an isosceles triangle.

[0045] The production method of the scratch-resistant high-viscosity flexible photovoltaic reflective film is as follows: firstly, the prism structure is pre-prepared on the surface of the pressure roller, the surface of the base film is coated with UV resin and passed through the pressure roller, and UV curing is carried out at the same time, and the micro-prism stru...

Embodiment 2

[0048] Such as figure 1 , figure 2 As shown, the scratch-resistant high-viscosity flexible photovoltaic reflective film has a four-layer structure, from top to bottom are coating layer 4, prism layer 3, substrate layer 1, hot-melt adhesive layer 2, substrate layer 1 thickness t 1 80μm, hot melt adhesive layer 2 thickness t 2 is 30 μm, and the thickness of the coating layer 4 is 70 nm. The ridge line of the prism forms an included angle of 0° with the direction of the ribbon, the distance between the ridge lines D is 30 μm, and the top angle of the prism ∠ 1 is 120°, and the section is an isosceles triangle.

[0049] The production method of the scratch-resistant high-viscosity flexible photovoltaic reflective film is as follows: firstly, the prism structure is pre-prepared on the surface of the pressure roller, the surface of the base film is coated with UV resin and passed through the pressure roller, and UV curing is carried out at the same time, and the micro-prism stru...

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Abstract

The invention provides a scratch-resistant high viscosity flexible photovoltaic reflective film which comprises a prism layer, a base material layer and a hot melt adhesive layer. The hot melt adhesive layer is arranged below the base material layer. The prism layer is arranged on the base material layer. The prism layer is composed of a number of triangular prism structures arranged in parallel. The invention further provides a preparation method of the scratch-resistant high viscosity flexible photovoltaic reflective film. The method comprises the steps that the triangular prism structure is prepared on the surface of a pressing roller in advance; mixed glue is applied on the upper surface of the base material layer; rubber covered roller passing and ultraviolet curing are carried out at the same time to acquire the prism layer of excellent strength; blend granulation is carried out on EVA, SIS and EAA resin in advance; and curtain coating is melt-extruded and coated on the lower surface of the base material layer to form the hot melt adhesive layer to acquire the scratch-resistant high viscosity flexible photovoltaic reflective film. The prepared scratch-resistant high viscosity flexible photovoltaic reflective film has the advantages of good strength, high reflectance and good oxidation resistance.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic industry, and in particular relates to a scratch-resistant high-viscosity flexible photovoltaic reflective film and a preparation method thereof. Background technique [0002] At present, it is more and more difficult for photovoltaic modules to improve power generation efficiency by improving the efficiency of cells, and huge investment often brings small improvements. Therefore, other ways of improving efficiency have received widespread attention. In photovoltaic modules, the front of the cell is covered by electrodes and ribbons. The area can reach 4%, that is to say, the module will lose 4% of the output power. In the Chinese patent (publication number: CN103413861A), a photovoltaic module reflective film and its fixing method with the welding ribbon are disclosed. The film refracts the light on the surface of the welding ribbon to the surface of the battery sheet through the surface re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/04G02B5/12
CPCG02B5/045G02B5/12
Inventor 黄宝玉朱笔峰
Owner 常州斯威克新材料科技有限公司
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