Sealing adhesive tape for double-glass photovoltaic modules and preparation method thereof

Abstract

The invention discloses a sealing adhesive tape for double-glass photovoltaic modules, which is composed of the following components in percentage by weight: 1-30% of butyl polymer, 5-25% of tackifying agent, 1-20% of polyester resin, 1-20% of polypropylene random copolymer, 0.5-3% of antioxidant, 20-79% of filler and 1-10% of ultraviolet absorbent and colorant. The sealing adhesive tape can be immediately used without curing; the sealing adhesive tape avoids the problem of high tendency to defects in the colloidal liquid inside the laminate due to moisture curing; the sealing adhesive tape has higher moisture permeation barrier capacity and higher sealing property, and the water vapor permeability is less than 0.85 g/m<2> 24h; the sealing adhesive tape is suitable for packaging both frame-bearing and frame-free assemblies; and the volume resistivity is greater than 10<10> ohm.cm.

Description

technical field [0001] The invention relates to a sealing tape used for a double-glass photovoltaic module and a preparation method thereof, belonging to the technical field of sealants. Background technique [0002] The solar double-glass photovoltaic module is a composite layer composed of two pieces of glass with solar cells in the middle. The cells are composed of wire strings and parallel lead terminals. It is a kind of solar photovoltaic module. It is characterized by replacing the backsheet material of traditional photovoltaic modules with glass. [0003] The backsheet materials of traditional photovoltaic modules include TPT, PVF, PVDF, PET and other materials or other composite materials, but there are many disadvantages. Glass has great advantages as a backsheet material: [0004] 1. The water permeability of glass is 0, while traditional backplane materials have high water permeability. The water vapor passing through the backplane can cause the internal EVA resi...

AI Technical Summary

Problems solved by technology

[0012] 1. The curing speed of silica gel is relatively slow, generally more than one day, which greatly affects the efficiency of assembly line operations, and occupies a large area of ​​space and inventory;

[0013] 2. Silicone relies on moisture to cure, and the glue inside the laminate is prone to defects;

[0014] 3. The ability to prevent moisture from penetrating is poor, and the sealing performance is weak;

[0015] 4. The amount of glue used for silica gel is large, and the excess glue will cause waste, and the cleaning will take time and effort, and the cost will be high;

[0016] 5. Silicone and double-sided tape seals are only suitable for packages with frames

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