Photovoltaic System

The China Photovoltaic Industry Association predicts that my country's newly installed photovoltaic capacity will reach 85 million kilowatts to 100 million kilowatts in 2022. In terms of installed capacity structure, household, commercial and industrial distributed, and centralized systems will share the market. Distributed photovoltaic installations, in particular, have seen rapid growth, rising from approximately 12% in 2016 to 53.4% in 2021, and reaching 67.2% in the first three quarters of 2022.

Driven by national policy support and improved industry technology, my country has gradually developed into one of the world's most important solar photovoltaic application markets and holds a dominant position in the global solar panel supply chain, with a share exceeding 75% in all key links of the solar photovoltaic industry. This includes polysilicon (79.4%), silicon wafers (96.8%), cells (85.1%), and modules (74.7%).

A solar photovoltaic module generally consists of tempered glass, EVA film, cells, backsheet, aluminum alloy frame, junction box, and adhesive for the module. As one of the key auxiliary materials in the photovoltaic industry, the continued healthy development of the photovoltaic industry has brought a broader market space for the adhesive industry.

Since solar photovoltaic modules are mainly used outdoors and are exposed to natural conditions such as high temperature and humidity, high and low temperatures, strong ultraviolet rays, ozone, wind and rain, photovoltaic adhesives are used to protect the outer frames around the photovoltaic panels and the interface positions of the junction boxes to extend the service life of the photovoltaic modules.

The application of photovoltaic adhesives in photovoltaic modules can be roughly divided into three categories: bonding, sealing, and potting, which are summarized as follows:

(1) Bonding and sealing of laminated modules and aluminum alloy frames;

(2) Bonding of junction boxes and backsheets;

(3) Potting of junction boxes.

Photovoltaic modules have relatively high requirements for adhesives, which must have properties such as waterproof sealing, UV resistance, weather aging resistance, acid and alkali resistance, etc. For the adhesive used for bonding and sealing frames, backsheets, and junction boxes, the main considerations are their curing speed and the adhesion, mechanical properties, and electrical properties after wet heat aging; for the adhesive used for potting junction boxes, the main considerations are their applicability period and the adhesion, heat dissipation, and electrical properties before and after wet heat aging.

Jiadi New Materials' organic silicone adhesives are well used in the production of solar photovoltaic module packaging due to their excellent high and low temperature resistance, excellent bonding, outstanding aging resistance, excellent insulation performance, good elasticity, hydrophobicity, simple application process, and high production efficiency.

Jiadi New Materials - Recommended Adhesives for Solar Photovoltaic Modules:

01 Solar Photovoltaic Module Sealant

I. Product Introduction:

Single-component silicone sealant, suitable for sealing photovoltaic module frames, junction box bonding, busbar sealing, and module rail sealing.

II. Product Features:

① Single-component deoximized

② Black/white, thixotropic paste

③ Yellowing resistance, high temperature and humidity resistance

④ TUV and SGS certified

⑤ Excellent sealing properties, with good adhesion to metal, glass, PPO, PA, and other materials

02 Junction Box Potting Adhesive

I. Product Introduction:

Two-component potting adhesive for solar photovoltaic module junction boxes.

II. Product Features:

① Two-component, 10:1/5:1 ratio

② Condensation type, fast room-temperature curing

③ Yellowing resistance, high temperature and humidity resistance

④ Excellent water resistance, good adhesion to materials such as PPO and PA

⑤ UL certified

About Jiadi New Materials

Founded in 2005, Jiadi New Materials is a national high-tech enterprise specializing in the research, development, production, and sales of new silicone and fine chemical materials. We are committed to becoming a provider of high-quality adhesive solutions for new energy, electronics, automotive, power equipment, communications equipment, optical, aerospace, and military industries.

Our main products include thermally conductive potting compounds, thermally conductive adhesives, thermal greases, thermal gels, thermally conductive gaskets, silicone peripheral products, and fine chemical products such as epoxies, polyurethanes, and acrylics.