阅读说明：本技术 一种高反射高粘接的光伏背板涂层及其制备方法 (High-reflectivity and high-adhesion photovoltaic back plate coating and preparation method thereof ) 是由 任锴 周豪浩 于 2021-07-30 设计创作，主要内容包括：本发明提供一种高反射高粘接的光伏背板涂层,按重量份计,所述光伏背板涂层包括以下组分：乙烯-四氟乙烯共聚物5-15份,聚烯烃40-60份,硅烷偶联剂1-5份,固化剂10-20份,二氧化钛20-30份。本发明高反射高粘接的光伏背板涂层,以聚烯烃为主体材料提供胶黏作用,通过加入乙烯-四氟乙烯共聚物提高光伏背板耐紫外的效果,通过加入硅烷偶联剂提高与光伏组件中电池的粘接力,通过加入二氧化钛提高光伏组件的反射率,光伏背板涂层反射率达到91%,超过普通涂层的背板反射率20%以上,并且涂层具有优异的粘接性。(The invention provides a photovoltaic backboard coating with high reflectivity and high bonding, which comprises the following components in parts by weight: 5-15 parts of ethylene-tetrafluoroethylene copolymer, 40-60 parts of polyolefin, 1-5 parts of silane coupling agent, 10-20 parts of curing agent and 20-30 parts of titanium dioxide. According to the photovoltaic backboard coating with high reflectivity and high adhesion, polyolefin is used as a main material to provide an adhesion effect, the ethylene-tetrafluoroethylene copolymer is added to improve the ultraviolet resistance effect of the photovoltaic backboard, the silane coupling agent is added to improve the adhesion force with a battery in a photovoltaic module, the titanium dioxide is added to improve the reflectivity of the photovoltaic module, the reflectivity of the photovoltaic backboard coating reaches 91%, the reflectivity of the backboard coating exceeds that of a backboard of a common coating by more than 20%, and the coating has excellent adhesion.)

1. The photovoltaic back plate coating with high reflectivity and high adhesion is characterized by comprising the following components in parts by weight:

5-15 parts of ethylene-tetrafluoroethylene copolymer, 40-60 parts of polyolefin, 1-5 parts of silane coupling agent, 10-20 parts of curing agent and 20-30 parts of titanium dioxide.

2. The high reflection high adhesion photovoltaic backsheet coating of claim 1, wherein said polyolefin melt index is in the range of 18 to 22.

3. The high reflection, high adhesion photovoltaic backsheet coating of claim 1, wherein said silane coupling agent is an ethoxysiloxane or a methylsiloxane.

4. The high reflection, high adhesion photovoltaic backsheet coating of claim 1, wherein said curing agent is an epoxy resin.

5. A preparation method of a photovoltaic back plate coating with high reflectivity and high adhesion is characterized by comprising the following steps:

weighing ethylene-tetrafluoroethylene copolymer, polyolefin, silane coupling agent, curing agent and titanium dioxide according to the weight parts, sequentially adding the silane coupling agent, the curing agent, the ethylene-tetrafluoroethylene copolymer and the polyolefin into ethyl acetate solvent, stirring for 0.5-1 h, adding the titanium dioxide by 2-3 times, stirring for 1-2 h, and standing for 3h to obtain the product.

Technical Field

The invention relates to the technical field of solar photovoltaic modules, in particular to a photovoltaic back plate coating with high reflectivity and high adhesion and a preparation method thereof.

Background

At present, a back plate material used on the back surface of a photovoltaic module mainly plays a role in insulation and support, but the back plate material does not contain adhesive property, a layer of EVA (polyethylene-vinyl acetate, hereinafter referred to as EVA) for adhesion needs to be added, the reflectivity of the back plate is low, and the power of the photovoltaic module is limited.

The photovoltaic back plate in the prior art has the defects that the production process of a photovoltaic module is complex and the cost is high, the laying of EVA is required to be increased while the back plate is used, and the using amount of the EVA is increased; the back sheet has a lower reflectivity resulting in lower power of the photovoltaic module.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides a photovoltaic back plate coating with high reflectivity and high adhesion and a preparation method thereof, so that the photovoltaic back plate coating has the functions of high reflectivity and high adhesion. The technical scheme adopted by the invention is as follows:

a high-reflectivity high-adhesion photovoltaic back sheet coating comprises the following components in parts by weight:

5-15 parts of ethylene-tetrafluoroethylene copolymer, 40-60 parts of polyolefin, 1-5 parts of silane coupling agent, 10-20 parts of curing agent and 20-30 parts of titanium dioxide.

Preferably, the photovoltaic back sheet coating with high reflectivity and high adhesion is used, wherein the polyolefin melt index is in a range of 18-22.

Preferably, the photovoltaic back sheet coating with high reflectivity and high adhesion is prepared by using an ethoxy siloxane or a methyl siloxane as the silane coupling agent.

Preferably, the photovoltaic back sheet coating with high reflectivity and high adhesion is prepared by a method of coating a photovoltaic back sheet on a substrate, wherein the curing agent is epoxy resin.

A preparation method of a photovoltaic back plate coating with high reflectivity and high adhesion comprises the following steps:

weighing ethylene-tetrafluoroethylene copolymer, polyolefin, silane coupling agent, curing agent and titanium dioxide according to the weight parts, sequentially adding the silane coupling agent, the curing agent, the ethylene-tetrafluoroethylene copolymer and the polyolefin into ethyl acetate solvent, stirring for 0.5-1 h, adding the titanium dioxide by 2-3 times, stirring for 1-2 h, and standing for 3h to obtain the product.

The invention has the advantages that:

according to the photovoltaic backboard coating with high reflectivity and high adhesion, polyolefin is used as a main material to provide an adhesion effect, the ethylene-tetrafluoroethylene copolymer is added to improve the ultraviolet resistance effect of the photovoltaic backboard, the silane coupling agent is added to improve the adhesion force with a battery in a photovoltaic module, the titanium dioxide is added to improve the reflectivity of the photovoltaic module, the reflectivity of the photovoltaic backboard coating reaches 91%, the reflectivity of the backboard coating exceeds that of a backboard of a common coating by more than 20%, and the coating has excellent adhesion.

Detailed Description

The present invention will be further described with reference to the following specific examples.

Example 1

The high-reflectivity and high-adhesion photovoltaic back plate coating comprises, by weight, 5 parts of an ethylene-tetrafluoroethylene copolymer, 60 parts of polyolefin, 1 part of ethoxysiloxane, 14 parts of epoxy resin and 20 parts of titanium dioxide.

A preparation method of a photovoltaic back plate coating with high reflectivity and high adhesion comprises the following steps: sequentially adding the silane coupling agent, the curing agent, the ethylene-tetrafluoroethylene copolymer and the polyolefin into a solvent ethyl acetate, stirring for 1h, adding the titanium dioxide complex by 2 times, stirring for 2h, and standing for 3h to obtain the product.

Example 2

The high-reflectivity and high-adhesion photovoltaic back plate coating comprises, by weight, 10 parts of an ethylene-tetrafluoroethylene copolymer, 50 parts of polyolefin, 3 parts of ethoxysiloxane, 12 parts of epoxy resin and 25 parts of titanium dioxide.

A preparation method of a photovoltaic back plate coating with high reflectivity and high adhesion comprises the following steps: sequentially adding the silane coupling agent, the curing agent, the ethylene-tetrafluoroethylene copolymer and the polyolefin into a solvent ethyl acetate, stirring for 1h, adding the titanium dioxide complex by 3 times, stirring for 2h, and standing for 3h to obtain the product.

Example 3

The high-reflectivity and high-adhesion photovoltaic back plate coating comprises 15 parts by weight of ethylene-tetrafluoroethylene copolymer, 40 parts by weight of polyolefin, 5 parts by weight of ethoxy siloxane, 10 parts by weight of epoxy resin and 30 parts by weight of titanium dioxide.

A preparation method of a photovoltaic back plate coating with high reflectivity and high adhesion comprises the following steps: sequentially adding the silane coupling agent, the curing agent, the ethylene-tetrafluoroethylene copolymer and the polyolefin into a solvent ethyl acetate, stirring for 1h, adding the titanium dioxide complex by 2 times, stirring for 2h, and standing for 3h to obtain the product.

The photovoltaic backsheet coatings obtained in examples 1 to 3 were subjected to the detection test, and the results are shown in table 1:

table 1:

and (4) analyzing results: from the experimental data in table 1, it can be seen that the photovoltaic back sheet coating with high reflectivity and high adhesion of the present invention completely meets the required performance of a photovoltaic back sheet, the reflectivity reaches 91%, which exceeds the back sheet reflectivity of a common coating by more than 20%, and the coating has adhesion.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.