PVB/SGP Glass Interlayer Film Extrusion Line
Its primary function is the precise production of two key products: PVB interlayer film and SGP interlayer film (ionoplast interlayer). Built on a mature and reliable extrusion process, the line allows flexible adjustment of production parameters to meet varying laminated glass standards across different applications. With stable and efficient processing performance, it ensures critical quality indicators-such as thickness uniformity and adhesion-are consistently met, laying a solid foundation for high-quality laminated glass. This enables safe and widespread use of laminated glass in industries such as automotive, construction, security, and new energy.
PVB Interlayer Film: Properties and Typical Applications
PVB (polyvinyl butyral) interlayer film is the most widely used bonding material in laminated glass, with its core advantage rooted in outstanding safety performance.
In real-world applications, laminated glass made with PVB interlayers can rapidly absorb impact energy when subjected to external forces such as shocks or collisions. This prevents the glass from shattering into sharp, hazardous fragments, effectively eliminating the risk of injury caused by flying shards. This inherent safety feature is the primary reason PVB has become the industry-standard material for safety glass.
Beyond its core safety performance, PVB interlayer film also offers a range of practical and high-value additional properties, including excellent UV resistance, effective sound insulation, flexible light control, as well as strong thermal insulation and vibration-damping capabilities. With its well-balanced overall performance, it remains the most widely used and one of the most ideal composite materials for laminated safety glass on the market today.
Leveraging these comprehensive performance advantages, PVB interlayer film is used across a wide range of applications. It is commonly found in automotive laminated glass (windshields, side windows, and rear windows), bullet-resistant and security glass (for security facilities and financial institutions), acoustic glass (for residential buildings, office spaces, and concert halls), photovoltaic glass (for solar power modules), and decorative colored laminated glass (for architectural and landscape applications).
These applications span key industries such as automotive manufacturing, security and protection, renewable energy, and architectural design, meeting both safety and functional requirements across diverse use scenarios.
SGP Film (Ionoplastic Interlayer) – Characteristics & Typical Applications
SGP film, also known as an ionoplastic interlayer, is a high-performance laminated material that significantly outperforms traditional PVB film.
Its core advantages come from a unique ionic polymerization process, which delivers a major leap in mechanical properties compared to PVB. Specifically, the shear modulus of SGP is more than 50 times that of PVB, and its tear strength is five times greater. Laminated glass made with SGP achieves twice the load-bearing capacity of PVB-based laminated glass.
Under the same load and with the same glass thickness, SGP laminated glass bends only one-fourth as much as its PVB counterpart, offering far superior resistance to deformation and structural stability. Compared to standard laminated glass made with PVB film, SGP-based laminated glass provides enhanced safety and mechanical performance, making it suitable for much more demanding applications.
Thanks to its superior mechanical strength and protective qualities, SGP film is typically used in specialized applications where high load-bearing capacity, impact resistance, and structural stability are critical.
Typical applications include
Ceiling glass in large-scale buildings (designed to withstand wind, rain, snow, and other loads)
Structural glass architecture (where glass serves as a key load-bearing element)
Elevated glass walkways (requiring impact resistance and minimal deflection to ensure pedestrian safety)
Exterior glass walls in high-rise buildings
Large glass curtain walls (on high-rise and super-tall buildings, built to resist strong winds and impact forces)
These applications demand performance far beyond what standard laminated glass can offer, and SGP film's exceptional properties make it an ideal solution-providing reliable safety and stability for premium architectural and specialty projects.
Key Technical Specifications of the PVB/SGP Glass Interlayer Film Extrusion Line
The PVB/SGP interlayer production line is designed to accommodate the distinct material properties and processing requirements of PVB and SGP films. A range of models is available, each optimized for key parameters such as finished product width, thickness, and production efficiency. This allows for precise alignment with diverse customer needs-whether for small-batch production, large-scale manufacturing, or custom sizes (width and thickness). With the right model, customers can achieve efficient, high-quality production tailored to their specific requirements.
The number of specific key technologies for each machine type is shown below
|
(Model) |
(Products width, mm) |
(Products thickness, mm) |
(Design max capacity, kg/h) |
|
JWP85 (SGP) |
1400–2300 |
0.76–2.28 |
400–500 |
|
JWP95 (SGP) |
2400–3800 |
0.76–2.28 |
500–600 |
|
JWS150 (PVB) |
2000–2600 |
0.38–1.52 |
400–500 |
|
JWP95 (PVB) |
2400–3800 |
0.38–1.52 |
500–600 |
|
JWP120 (PVB) |
2400–3600 |
0.38–1.52 |
1000–1200 |
|
JWP130 (PVB) |
2400–3800 |
0.38–1.52 |
1200–1500 |
|
JWP65+JWP95 (PVB) |
2000–3200 |
0.38–1.52 |
600–700 |
PVB/SGP Glass Interlayer Film Extrusion Line Production Process Features
The production line utilizes an advanced continuous extrusion process, integrating precision temperature control, in-line inspection, and automated winding technology. A closed-loop control system is maintained throughout the process to ensure stable, efficient production and consistent product quality. Key process highlights include:
Plasticizing System: Built around a high-efficiency screw and barrel design, paired with a precision temperature control module (accuracy of ±1°C). This ensures uniform plasticization of the resin, preventing localized overheating or incomplete plasticization, resulting in stable internal material properties and minimizing defects.
Forming System: Equipped with a high-precision die and calendering unit. The die gap can be accurately adjusted, and an in-line thickness measurement system (accuracy of ±0.01 mm) provides real-time feedback to correct thickness variations. This ensures uniform sheet thickness and a smooth, scratch-free surface.
Winding System: Utilizes a fully automatic tension control system that adjusts winding tension based on sheet thickness and width. This prevents issues such as wrinkling or stretching deformation during winding, delivering neatly wound rolls that are easy for downstream customers to handle in subsequent processing.
Energy Efficiency & Environmental Protection: Features low-energy motors and a waste heat recovery system, reducing energy consumption by 15–20% compared to conventional production lines. The process generates no emissions of waste gas, wastewater, or solid waste, meeting national environmental standards and supporting green, low-carbon manufacturing.
With its specialized machine designs and stable process performance, the PVB/SGP Glass Interlayer Film Extrusion Line enables professional, high-volume, and customized manufacturing of both PVB film and SGP film-fully meeting the needs of laminated glass production across a wide range of industries and applications.
Industry Application Outlook
As the construction, automotive, and new energy sectors continue to grow rapidly, demand for high-performance laminated glass is steadily rising. This is driving expansion in the PVB/SGP interlayer market and creating significant opportunities for the production line.
Construction: With accelerating urbanization and the growing number of high-end buildings, applications such as glass curtain walls, glass walkways, and large-span skylights are becoming more widespread. SGP interlayer, known for its excellent structural performance, is seeing increasing market demand year by year.
Automotive: The rise of new energy vehicles and higher automotive safety standards are driving greater requirements for the safety and acoustic performance of automotive laminated glass. Demand for PVB interlayer remains stable, while high-performance SGP interlayer is gradually being adopted in premium vehicle models.
New Energy: The rapidly expanding photovoltaic industry demands interlayers with strong durability and reliable adhesion. PVB and SGP interlayers help extend the service life and enhance the safety of PV modules, representing significant market potential.
Security & Safety: Growing demand in high-end security and blast-resistant applications is driving adoption of SGP interlayer. With its superior impact and blast resistance, SGP is gradually replacing traditional protective materials and expanding into new application areas.
After-Sales Support
Technical Support
We provide complimentary equipment installation and commissioning services, backed by a dedicated technical team offering remote assistance and operational training to ensure a smooth production ramp-up.
Maintenance Services
A 24-hour after-sales response system is in place. When service is needed, our team first provides remote diagnostics and technical guidance to resolve issues quickly, minimizing downtime and ensuring reliable operation.
Spare Parts Supply
Genuine, high-quality replacement parts are available through a long-term supply channel. Timely availability helps prevent production disruptions due to parts shortages.
Upgrade Services
As technology evolves and customer needs change, we offer equipment upgrade solutions to help clients improve production efficiency and product quality, enabling them to adapt to market shifts effectively.
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