- Hui-Liang Industrial Co., Ltd. (Industrial Material Department)
Hui-Liang Industrial Co., Ltd. (Head Office 2)司

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ESF® is extruded mixture of special plasticizer, additives and also called Polyvinyl Butyral.

ESF® has excellent adhesion, light transmission and safety.  It is broadly apply to architectural laminated glass.





Laminated Process

1. Placing

Placed the ESF® in the middle of two PVB film, then put it between washed and re-dried glass.  As below, are some points for attention during placing process:

◎The process should be done with constant temperature and humidity.(suggested condition: 25℃ and RH20%)

◎The temperature of ESF®, PVB film, and glass should be the same in order to avoid the air exhaust and lead to bad adhesion.

◎Avoid any mechanical stretch.

2. Pre-Pressing

As below are the purpose of pre-pressing:

◎Discharge the air between ESF®, PVB film, and glass

◎Enhancing the adhesion between ESF®, PVB film, and glass.

◎To seal the edge of laminated glass to avoid the air invalid into laminated glass.


There are two methods for pre-pressing:


→Nip roll system: Broadly apply to flat laminated glass.  As below are some suggested conditions:

→Vacuum system: This process is mainly for bent glass.  The suggested conditions are as below:


3. Autoclave Process

In this process, an air type or oil type autoclave is generally used.  As following is suggested conditions of autoclave process:

◎The speed of temperature and pressure rising should be closed.

◎It takes more time to equilibrate pressure and temperature for multi-layer.

◎The pressure should be released when  the temperature is under 50℃.


The laminated glass with ESF Film can achieve various standards for safety glass such as, CNS-1183, Taiwan patent right, and the People's Republic of China utility model patent.