BIPV PVB photovoltaic film production line

 Introduction of BIPV PVB photovoltaic film production line

The BIPV PVB photovoltaic film production line of GWELL intelligent equipment, the top three PVB manufacturers in China all use GWELL’s PVB dry (over-roll method) and PVB wet (over-water method) film equipment, India’s first PVB film The production line is also manufactured by GWELL. PVB film width: 3600mm (max), PVB film thickness: 0.38-1.52mm, output: 500-800kg/h, shrinkage rate: ≤2%, total production line length: 28m. It can be cut into the required width according to user requirements. This production line has the following characteristics:

• Adapt to different types of processing of many material systems.
• From feeding to winding, automatic compounding, and PLC full set integration, turnkey projects can be done.
•  Large output, low energy consumption, and a high degree of automation.

BIPV PVB photovoltaic film production line is divided into two methods

• The dry process, also known as the silver process, is cast and extruded, cooled in the air, shaped, and rolled.
• The wet process, also known as the water-passing process, the tape-extruded film is cooled and shaped by a water tank, and then dried and wound.

There is a big difference in equipment between the two processes, and the price is also very different. The main machine can also use a single-screw extruder or parallel twin-screw extruder according to different needs and raw material conditions.

The main purpose of  BIPV PVB photovoltaic film production line

• PVB automotive safety glass film production line: PVB film is mainly used for the middle layer of the front windshield of the car.
• PVB architectural glass interlayer film production line: PVB film is mainly used for the interlayer of high-rise building glass.
• PVB solar film production line: PVB film is used for the packaging of photovoltaic solar thin-film cells.

BIPV photovoltaic grade PVB film production line

• PVB has the advantages of strong adhesion, impact resistance, UV isolation, sound insulation, and environmental protection. It is currently mainly used in building and automotive safety glass.
• PVB is expected to gradually penetrate into the field of photovoltaic packaging film, and the application of the BIPV field may be the first to break through.
• PVB interlayer film is mainly used as a packaging material in the double-glass field (one side of the traditional single-sided module is the frame, and PVB packaging is mainly a double-sided lamination process). Currently, PVB has high production barriers and high packaging costs due to photovoltaic products. The proportion of high-level problems is still small, but with its good performance such as high adhesion, high water penetration resistance, and high weather resistance, it is expected to gradually attract attention with the increase in the application of double-sided modules.

Advantages of PVB encapsulation film

1. PVB film is mainly used for BIPV modules, the structure is steel glass (ultra-clear)-PVB_cell-PVB-tempered glass (ordinary).
2. Comparison of PVB packaging film and EVA packaging film EVA is a thermosetting resin with cross-linking reaction, while PVB is a thermoplastic resin with reproducibility and no cross-linking reaction.
3. The domestic glass curtain wall specification clearly puts forward the requirement of “application of PVB”. BIPV photovoltaic modules are made of PVB instead of EVA to achieve a longer service life.
4. PVB has strong adhesive performance, and its safety is higher than that of EVA film.
5. EVA POE Solar Film Extrusion Line has many formulas, and the packaging process is not easy to control; the formula of PVB film is simple, the quality control is stable, and the shelf life is long.
6. The fluidity of PVB film is poor, which can prevent the overflow of the film during processing.

The PVB photovoltaic film production line manufactured by GWELL adopts a unique design and advanced manufacturing technology. Improve the stability and automation of the machine. The feeding system is connected with the extruder to realize accurate proportioning of raw materials online so that the quality of PVB film is stable and labor is reduced. Use specially designed rollers to cool the PVB film evenly, reduce the stress caused by uneven heating and cooling, and ensure the correct shrinkage rate.

The PVB (polyvinyl butyral) film of the BIPV PVB photovoltaic film production line is a thermoplastic resin film produced from PVB resin plus plasticizer. Widely used in architectural laminated glass, automotive laminated glass, solar photovoltaic glass, bulletproof glass, soundproof glass, etc. It has good safety and prevents the glass from breaking due to external force and the fragments splash and hurt people; it has sound insulation, and anti-ultraviolet, and can be made into color or high transparency. It has been used in building curtain wall glass for 70 years: it has optical Application value, and solar photovoltaic can be applied. PVB film is currently produced by roller forming and water forming and can produce transparent color strips and full-color films with a thickness of 0.38-1.52mm and a width of 500-3400mm.