EVA stands for Ethylene Vinyl Acetate. It is a copolymer resin. The resin, together with a number of ingredients, is heated and mixed thoroughly and is then extruded through a flat die. EVA film is then formed.

EVA film is available with clear, white and many different colours. It contains no plasticizer. It is always packed in roll form. The outstanding adhesive EVA film is non-sticky and its surface is smooth.

EVA film is always used as an interlayer sandwiched in between two pieces of glass or plastic sheet.

The advantages of EVA film are,

- high tensile strength
- excellent transparency
- outstanding adhesion
- UV protection
- sound barrier
- good temperature withstanding
- water proof
- high wind resistance
- humidity durable
- long-term reliable

As architectural design becomes more and more sophisticated, glass is playing significant role in building construction and decoration. It leads to a diversified demand in laminated glass, not only in safety and security purposes, but also aesthetics, design, art and view control etc.

One of the most popular bonding interlayer films, nowadays, used for glass lamination is PVB. Despite PVB is expansive, PVB is delicate to handle. It requires a clean room with humidity and temperature controlled for the assembly of PVB film in between two pieces of glass. If the assembly is done under improper environmental condition, the result of the PVB laminated glass is not satisfactory. In addition, the production line is long and occupies large space. Meanwhile, an autoclave is required for final bonding. The investment in PVB laminated glass manufacturing facilities is high and the production cost is high. Only those large sizes of glass fabricator could afford.

However, there is an alternative with lower investment and lower operating cost. It is EVA laminated glass. Like PVB, EVA film is used to be an interlayer film sandwiched in between two pieces of glass. It is distinctive in giving versatile design and meanwhile, safety properties to match today’s architectural and decorative needs.

Unlike PVB, no autoclave, roller press, air bag or vacuum rubber ring is required for the manufacturing of EVA laminated glass. Unlike PVB, no clean room with climatic controlled is required because EVA film could be handled under normal climatic condition. Unlike PVB, no production line is required.

The only machine required is just a heating oven with vacuum utilities. Please see EVA laminating machine to find out more information.

If sophisticated design pattern for decorative purpose is mostly concerned, a piece of design film could be put together with the EVA films in between two pieces of glass or plastic sheet. There are numerous selection of design pattern film, for example, PET, silk, metal mesh, paper, fiberglass, fabric, and cloth etc. EVA film bonds very well with many different types of materials at outstanding compatibility.

PDLC stands for polymer dispersed liquid crystal. It consists of thin layer of liquid crystal sealed between two pieces of PET film. It is connected to a power. When there is no electricity, it is opaque. When there is, it becomes transparent. The PDLC film is always sandwiched in between two pieces of glass or plastic sheet with EVA film as the encapsulation material.

Sometimes, it is know as smart glass, intelligent glass, magic glass, privacy glass, switchable glass, electronic conductive glass, color changeable glass, etc.

It could be used for window and door, conference room, hospital, school, hotel and function room etc. Another area of widely applied is advertising and promotional activities. The video or picture is projected onto the glass or plastic sheet with interior PDLC film.

Please see PDLC film for more information.

Due to enormous increasing demand of green energy in recent years, photovoltaic becomes one of the most important technology substituting traditional fossil fuel energy. The most popular photovoltaic technology is to use two pieces of ultra clear roll glass laminated with silicon wafer-based to form photovoltaic panel or solar cell. After numerous experiments, EVA film is selected to be the most optimum material for the encapsulation and it is almost monopoly in the solar cell market as the most operating-friendly and cost effective material for solar battery glass encapsulation.

By compounding with anti-UV additives, EVA film does not become yellowish after years of long exposure to sunlight. Meanwhile, it can prevent the building interior from aging or color fading, for example, carpet, wall painting, wall paper, furniture and any kinds of stuff close to the window and door.

The application could be infinite. The abundance supplies of a great many choices of design interlayer such as silk, fabric, paper and metal mesh etc with combination of a wide variety of different colors, transparent, translucent or opaque of EVA film could lead to numerous aesthetics and visual effects.

Some of the major advantages of EVA film are summarized as below,

EVA film contains no plasticizer.
Investment of manufacturing facility is low.
No autoclave, roller press, vacuum bag and vacuum rubber ring is required.
EVA laminating machine occupies little space.
EVA film costs less.
Low operating cost.
Storage, handling and assembly of EVA film do not require to be done in a clean, moisture and temperature controlled room.
When the rest roll of EVA film is not used, just keep it inside the packing. It is not required to use it up within a day.
Lamination with plastic sheet is easy.
EVA film is available in clear, different kinds of white and a large selection of color, transparent, translucent and opaque.
EVA film is compatible to a variety of material such as fabric, cloth, paper, metal mesh, fibre glass and silk to form aesthetics effect to meet architect’s request.