What are the application scenarios of solar double glass tape?

Solar double-glass adhesive tape is a special adhesive product for photovoltaic double-glass module packaging. Its core is glass-glass double-glass module structure, with high adhesion, weatherproof sealing, instant positioning and automatic production as its core advantages. It mainly replaces/complements traditional silica gel, and is applied to the core sealing/bonding scene of double-glass module production packaging, site installation of power station and post-maintenance. At the same time, it is suitable for the development trend of large size, light weight and high reliability in photovoltaic industry, and its core application scene is concentrated on double-glass.

First, the core main scene: the production and packaging of photovoltaic double glass components (accounting for more than 90%)

This kind of scene is the main application field of solar double glass adhesive tape. It is the mainstream choice for photovoltaic module manufacturers to fit the large-scale and automatic production process of the module factory, replace the traditional silica gel to complete the core sealing/bonding, and improve the production efficiency and packaging reliability.

Inner sealing of double glass component frame (the core scene)

Attached to the inner glass joint surface of the aluminum alloy frame of the double glass module, it cooperates with the frame to form a double sealing structure of "adhesive tape+metal frame" to replace the inner sealing function of silica gel. The closed-cell structure of the adhesive tape realizes high waterproof and gas insulation, and the elastic foam can offset the stress of thermal expansion and cold contraction of the assembly, avoiding glass cracking, and at the same time, there is no glue overflow problem and no pollution to the glass surface, which is suitable for the frame sealing requirements of large-size double-glass assemblies.

Bonding and sealing of junction box/junction box of double glass module

Used for the fixed bonding and waterproof sealing of junction box and confluence box on the back of double glass module, which has dual functions. Compared with silica gel, the adhesive tape has no curing time for instant positioning, and there is no risk of displacement of the junction box after bonding, and there is no gap in the sealing layer, which can effectively prevent water vapor from infiltrating into the assembly from the gap of the junction box, prevent the oxidation of battery chips and welding strips, and improve the IP protection level of the assembly (up to IP67+).

Local splicing/seam sealing of double-glass assembly glass

In view of the glass splicing process of some large-size double-glass components or the flat-seam sealing of glass edges in the production of components, the adhesive tape is attached to the flat-seam to realize rapid sealing, replace the local sealing function of silica gel, have no curing waiting, and are suitable for continuous production in the production line, and the sealing layer is uniform, without glue and overflow.

Bonding and Fixing of Auxiliary Parts of Double Glass Assembly and Glass

It is used to bond the small auxiliary parts such as the grounding plate, the label sticker and the fixing buckle on the back of the double glass module with the glass. The high initial adhesion of the adhesive tape is used to realize instant fixing, and the production process is simplified without curing of silica gel. The auxiliary parts after bonding have no risk of falling off, and are resistant to outdoor high and low temperatures and ultraviolet rays, and will not fail after long-term use.

Second, the secondary supplementary scenario: on-site installation and local sealing of photovoltaic power station

This kind of scene takes convenient construction and quick sealing as the core requirements, and it is suitable for the working conditions where there is no professional curing condition at the power distribution station site and sealing/fixing needs to be completed quickly, and most of them are attached by hand to replace the tedious process of on-site gluing.

Double-glass module power station installation flat-seam seal

In distributed photovoltaic and roof photovoltaic power stations, the installation seams between double glass modules are partially sealed with adhesive tape to prevent rainwater and dew from infiltrating into the roof/bracket below the modules from the seams, so as to avoid roof moisture regain and bracket corrosion. Compared with on-site gluing, there is no need to wait for curing, and the construction efficiency is improved several times.

Buffer seal at the contact between the frame of the assembly and the bracket

When the double-glass module is fixed to the photovoltaic bracket, a thin double-glass adhesive tape is attached to the contact position between the frame and the bracket, which has the functions of cushioning and shock absorption and local sealing, avoiding scratching and deformation caused by hard contact between the metal frame of the module and the bracket, and preventing water vapor from entering from the contact gap to prevent the frame from oxidation.

Third, emergency repair scenario: photovoltaic module/power station later maintenance and sealing repair

During the operation of photovoltaic power station, it is suitable for the quick repair of problems such as sealing failure of double glass module, opening of frame and leakage of junction box, and the sealing can be completed by manual attachment on site without disassembling the module, which greatly reduces the maintenance cost. It is the preferred gluing scheme for the later maintenance of power station.

Failure repair of frame seal of double glass module

If the silica gel inside the frame is pulverized, cracked and degummed, which leads to the sealing failure of the double-glass module used outdoors for many years, the double-glass tape can be attached for secondary sealing after cleaning the glass surface of the frame, so as to quickly restore the waterproof and gas-proof performance of the module and prevent water vapor from entering the module to damage the battery cell.

Repair of leakage of junction box/junction box

If there is water leakage at the junction between the junction box and the junction box of the double-glass module and the glass, after cleaning the surface, tape is attached around the edge of the junction box/junction box to form an annular sealing layer, which can quickly block the infiltration of water vapor and replace the complicated process of re-gluing, and there is no waiting for curing after repair, and the module can be immediately restored to use.

Temporary seal for partial damage of glass surface of assembly

When the glass surface of the double-glass module is slightly damaged or cracked, use special special-shaped die-cut double-glass adhesive tape to attach it to the damaged part for temporary sealing, so as to prevent water vapor and dust from entering the module, gain time for subsequent professional maintenance and avoid the failure of the module due to the expansion of the damage.

Fourth, extended adaptation scenario: special type of photovoltaic double glass module packaging

In line with the product upgrading trend of photovoltaic industry, it is suitable for thin, lightweight and special-shaped double-glass components, which require higher weight, thickness and adaptability of packaging materials, and the advantages of lightweight and die-cutting customization of double-glass tape are particularly prominent.

Thin/Lightweight Double Glass Package

The thin double-glass module for distributed photovoltaic and building photovoltaic integration (BIPV) requires light weight and thin thickness of packaging materials. Compared with silica gel, the double-glass adhesive tape has no thickening problem of solidified layer, and its own weight can be ignored. After being attached, it does not increase the overall weight and thickness of the module, and it is suitable for scenes with strict requirements on the weight/size of the module, such as roofs and curtain walls.

Double-glass package with special-shaped structure

BIPV photovoltaic curtain wall, photovoltaic tile and other special-shaped double-glass components, the frame and stitching are non-standard sizes/shapes. Double-glass adhesive tape can be accurately die-cut and customized according to the special-shaped structure (ring, strip and special-shaped parts), and can be sealed by direct attachment, without field cutting and gluing, so as to meet the personalized packaging requirements of special-shaped components.

Key application supporting points (common to all scenarios)

All gluing scenes need to ensure that the glass surface is free of oil, dust and water stains, otherwise the adhesion will be greatly reduced. Plasma cleaning is used in production and dust-free wiping cloth is used in the field.

After the adhesive tape is attached, it needs to be evenly pressed (automatic pressure roller for production and manual pressure roller for site) to ensure that there is no air bubble and edge warping between the adhesive tape and the glass, and air bubble will lead to seal failure;

Select the thickness of adhesive tape according to the scene: 1.0~3.0mm thick for frame sealing (which needs moderate compression) and 0.5~1.0mm thin for local bonding/repair.

Core application summary

The application scene of solar double-glass adhesive tape always revolves around the sealing and bonding of photovoltaic double-glass modules, with the packaging link of the module factory as the core, supplemented by site installation and post-maintenance of the power station. The core replaces the pain point of "low efficiency, easy to overflow and need to be cured" of traditional silica gel, and at the same time, with the advantages of weatherability, cushioning and light weight, it adapts to the development trend of large size, BIPV and distributed photovoltaic in photovoltaic industry, and is a special preferred adhesive material for double-glass module packaging.