What are the key properties of laminated glass
Information summary：The key performance of laminated glass revolves around the core of "safety protection", while also possessing multiple advantages such as sound insulation, heat insulation, and durability. Specifically, it can be broken down into the following five core dimensions:
The key performance of laminated glass revolves around the core of "safety protection", while also possessing multiple advantages such as sound insulation, heat insulation, and durability. Specifically, it can be broken down into the following five core dimensions:
1. Safety: Broken without splashing, preventing secondary injury
This is the core performance of laminated glass - its composite structure of "glass+organic intermediate film (such as PVB, SGP)". When the glass is shattered by external forces (such as stone impact, accidental collision), the fragments will be firmly stuck by the intermediate film, and will not form sharp scattered fragments, only presenting the overall shape of "spider like cracks", which can avoid scratching, injuring people or falling and injuring people. Therefore, it is forcibly used in scenarios with high safety requirements such as car windshields and high-rise building glass guardrails.
2. Strong impact resistance and anti-theft: resistant to manufacturing and intrusion
The intermediate membrane (especially SGP ionic intermediate membrane) has high toughness and tensile strength, which can greatly enhance the impact resistance of glass: it can not only withstand large loads (such as typhoon and hail impact), but also maintain the overall structural integrity even if the glass is partially broken, delaying further external force intrusion (such as continuous damage to break through the intermediate membrane barrier when thieves damage glass). Therefore, it is commonly used in scenes such as bank windows, jewelry display cabinets, and typhoon resistant building curtain walls, which have both impact resistance and basic anti-theft effects.
3. Efficient sound insulation: Weakens noise and optimizes the environment
The organic polymer material of the intermediate film (especially PVB film) has a good "damping effect", which can effectively weaken the propagation path of sound waves - compared to ordinary single-layer glass, it can reduce 3-5 decibels of noise, and has a more prominent isolation effect on medium and low-frequency noise (the most difficult type of noise to isolate) such as traffic and machinery. For example, when used for the exterior windows of buildings facing the street and the glass of high-speed railway cars, it can significantly reduce the interference of outdoor noise on indoor environments.
4. Insulation and filtering: energy-saving and customizable
Thermal insulation and energy saving: Some customized laminated glass (such as laminated Low-E film and colored intermediate film) can block more than 50% of solar infrared rays, reducing the entry of solar radiation heat into the room. It can reduce air conditioning load in summer and indoor heat loss in winter, with a certain degree of energy saving;
Filtering and Privacy: Customization of functions can be achieved by selecting different intermediate films. For example, the "UV resistant intermediate film" can block more than 99% of ultraviolet rays (avoiding furniture and fabric fading), and the "frosted/colored intermediate film" can block the line of sight and protect privacy (such as bathroom partitions and office glass walls).
5. Excellent durability: Long term use without failure
Excellent intermediate membranes (such as PVB) have good anti-aging and water vapor permeability resistance: when exposed outdoors for a long time (such as building curtain wall and daylighting roof), they are not prone to delamination, yellowing, mildew and other problems, and can resist the aging corrosion of ultraviolet rays on glass and intermediate membranes. Under normal use, the service life can reach 15-20 years, without frequent replacement and maintenance.
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