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Product Overview

Description

 

SGP Film for laminated glass

 

ntroduction of SGP laminated glass:

SGP film is an ionic film specially developed by our company. It is a copolymer of ethylene and methacrylate and contains about 1% metal sodium ion. The adhesion force between the film and glass is mainly the result of ionic bond. PVB The bonding between the film and the glass stems from the hydrogen bond formation between the COH group in the polyvinyl butyral film and the SiOH group in the glass. Therefore, the bonding strength of SGP film and glass is much higher than that of PVB film and glass, and the shear modulus and tear strength are increased by 50 times and 5 times respectively. According to the data provided by our company, the physical properties of SGP film are as follows:

Young's modulus (300Mpa) Shear strength (50MJ/M2) Tensile strength (34.5Mpa)

Elongation at break (400%) Density (0.95g/cm³) Flexural modulus (345Mpa) 23℃/h

Hot winding temperature (43℃) Melting point (94℃) Thermal expansion coefficient (10~15-3cm/cm℃)

Storage of SGP film:

Although the water absorption rate of SGP film is small, once the water content of the absorbed water exceeds the standard, the absorbed water is difficult to be used as PVB film. Store it in a suitable temperature environment for a period of time to release it and regain the water content balance. Claim. Therefore, the remaining film after opening and use must take measures to re-seal and ensure the sealing effect of the package and the humidity in the package to avoid excessive moisture content caused by long-term storage.

 

SGP laminated glass with point support structure:

In view of the good safety performance of SGP film laminated glass, it is widely used in the laminated glass of the point support structure, that is, the laminated glass of the hole structure. Whether the laminated glass with a porous structure adopts roll pre-compression or vacuum pre-compression, it needs to be considered according to factors such as glass size, thickness, film thickness, glass and film layers, and glass shape.

The common defect encountered in the production of point-supported laminated glass is the problem of bubbles or air bag interlayer near the periphery of the hole. Such bubble defects are often caused by air blowing in the autoclave stage due to poor pre-pressing and sealing; The defect is usually that the pre-pressing temperature is too low to melt the SGP film. If the film is foggy and the lines are clearly visible before entering the autoclave, it is necessary to reduce the pre-pressing line speed and increase the time of the laminated glass in the roller pressing heating section To improve.

 

What is the interlayer film for laminated glass?

[Basic description] Laminated glass is also called laminated glass, and its English name is Laminated Glass. Laminated glass is two or more pieces of float glass sandwiched with an ionic interlayer film (SGP film), which is pressed and combined as much as possible The intermediate air is discharged from the ground, and then put into the high-pressure steam autoclave to dissolve the remaining small amount of air into the intermediate film at high temperature and pressure.

Currently, the interlayer film widely used in laminated glass for glass curtain walls is polyvinyl butyral, or PVB for short. PVB has been used for many years, and it is also familiar to the curtain wall industry. However, this laminated film was originally developed for automotive glass, so its performance is mainly to meet the requirements of automotive glass. Because PVB film is not mainly developed for building curtain walls, it is elastic, relatively soft, and has a small shear modulus. After two pieces of glass are stressed, there will be significant relative slippage, small bearing capacity, and large bending deformation. PVB laminated glass can be used for general glass curtain walls, but not suitable for glass curtain walls with high performance requirements. At the same time, the exposed edges of PVB laminated glass are easily exposed to moisture, and PVB laminated glass is prone to yellowing and discoloration after long use.

 

[Product Features] The ideal laminated glass interlayer film for building curtain walls should meet the following requirements:
1. It has high adhesion to glass and strong tear resistance, which can prevent the glass from scattering when it is broken.
2. It has a strong protective ability, which can prevent the destruction of natural forces and manpower. It has sufficient resistance to strong winds, earthquakes, violence, theft, etc.
3. It can withstand the sudden impact of indoor personnel, prevent the glass from flying out or coming out as a whole, and prevent indoor personnel from flying out and falling.
4. There is enough residual bearing capacity, and the whole piece will not fall off when the glass is broken and deformed.
5. The intermediate film has a large shear modulus, so that the two pieces of glass can be bent as much as possible across the entire section, thereby improving the bearing capacity and bending rigidity of the glass, reducing the thickness of the glass, and reducing the weight of the glass.
6. It is colorless and transparent, can withstand the influence of ultraviolet rays, water vapor and external climate change, and will not yellow or change color after long-term use.

The PVB film currently used cannot fully meet the above requirements. However, SGP film is a high-performance interlayer film developed in recent years for curtain wall laminated glass. SGP film is suitable for higher-rise building curtain walls, large-span daylighting roofs, large sizes and thicker interlayers. Glass, all-glass structure, etc. have high standards for laminated glass.

 

 

STADARD SPE
Thickness(mm)	Width(mm)	Length(mm)
0.76	1220/1530/1830/2140/2440	200
0.89		200
1.14		150
1.30		120
1.52		120