How to Prevent Thermal Bridging in Window Frames Using Polyamide Thermal Break Strips?

Window frames are a common spot for thermal bridging in buildings, as metal components like aluminum easily conduct heat. This not only wastes energy but also reduces indoor comfort. As a professional thermal break strip manufacturer with R&D experience since 2006, we know that high-quality polyamide thermal break strips are the key to solving this problem. By integrating production, equipment and technology, we provide one-stop services to help customers effectively block thermal bridging.

Understand Thermal Bridging Risks and the Role of Thermal Break Strips

Why Thermal Bridging Hurts Window Performance

Thermal bridging in window frames causes two major issues. First, it increases energy consumption—heated or cooled air escapes through the metal frame, forcing HVAC systems to work harder. Studies show that windows without effective thermal break solutions can raise a building’s energy bills by 20-30%. Second, it creates comfort problems: cold spots form around frames in winter, leading to condensation or even mold growth. For builders and homeowners, solving thermal bridging starts with choosing the right thermal break materials.

How Polyamide Thermal Break Strips Block Heat

Polyamide (nylon) has low thermal conductivity, making it ideal for thermal break applications. When installed between the inner and outer aluminum profiles of window frames, polyamide thermal break strips act as a barrier, stopping heat from transferring through the metal. Unlike other materials, polyamide retains its shape and performance in extreme temperatures—from -40°C to 80°C—ensuring long-term thermal break effects. Our company has optimized polyamide formulas over 17 years, making our thermal break strips more durable than standard products.

Key Factors in Producing Effective Polyamide Thermal Break Strips

Twin Screw Extruders for High-Quality Granules

The foundation of a good thermal break strip is high-performance polyamide granules. We use twin screw extruders for granulation, a process that sets our products apart. Twin screws work together to evenly disperse glass fibers into the polyamide matrix, creating a network structure. This uniform dispersion boosts the granules’ strength—our glass fiber-reinforced granules have a tensile strength of over 80MPa—and ensures consistent thermal break performance. Unlike single screw extruders, twin screws cannot produce thermal break strips directly, but they are essential for making the high-quality granules needed for production.

Single Screw Extruders for Thermal Break Strip Production

When it comes to making the final thermal break strips, only single screw extruders work. Single screw extruders provide stable pressure and precise temperature control, which is critical for shaping polyamide into uniform strips. Our single screw extruders are customized for thermal break production: they heat polyamide granules to 230-250°C (the optimal range for polyamide) and maintain steady extrusion speed, ensuring each strip has the same thickness and smooth surface. This precision prevents gaps between the strip and aluminum profiles, a common cause of failed thermal break effects.

One-Stop Services from Our Thermal Break Strip Manufacturer

Full Production Line Supply

As a one-stop service provider, we offer everything needed for polyamide thermal break strip production. This includes our twin screw-made polyamide granules, custom single screw extruders, and matching molds (developed with our partner, a leading mold manufacturer). By sourcing all components from one supplier, customers avoid compatibility issues—for example, our granules are pre-tested with our extruders to ensure perfect processing. This saves time and reduces procurement risks.

Technical Support for Thermal Break Applications

We don’t just sell products—we provide end-to-end technical support. Our team helps customers set up production lines: we advise on twin screw granulation parameters (like screw speed and temperature) and train workers to operate single screw extruders. We also offer on-site guidance for window frame assembly, ensuring thermal break strips are installed correctly. For example, we teach customers to use the right adhesive to bond strips to aluminum profiles, maximizing thermal break efficiency.

Quality Assurance for Long-Term Thermal Break Performance

We conduct strict quality checks at every stage. Our granules are tested for thermal conductivity and strength; our thermal break strips undergo 1000-hour aging tests to confirm durability. We also provide certification documents for our products, meeting international standards like ISO 10077. This quality assurance means customers can trust our thermal break strips to prevent thermal bridging for over 20 years, a promise backed by our 17 years of industry experience.

Preventing thermal bridging in window frames is not just about choosing the right thermal break strips—it’s about partnering with a manufacturer that offers reliable products and full support. Our twin screw granulation technology, single screw extrusion expertise, and one-stop services make us the ideal partner for customers looking to solve thermal bridging problems effectively.