What Advantages Does PA66 Offer Over Other Materials for Thermal Break Strips?

The Importance of Material Choice in Thermal Break Strip Quality

Material selection directly determines the performance and durability of thermal break strips, a key component in energy-efficient windows and doors. Our company has focused on research and development of special materials for thermal break strips since 2006, and through years of industry experience, we have identified PA66 as a standout option compared to alternatives like PVC, PA6, and ordinary plastics. Thermal break strips need to withstand mechanical stress, temperature fluctuations, and outdoor elements—requirements that PA66 meets more effectively than most materials. As we expanded from China’s domestic market to international business, we noticed that customers increasingly prioritize long-lasting, high-performance thermal break strips, making PA66’s advantages even more critical for meeting global demands.

Superior Mechanical Strength: PA66 vs. PVC and Ordinary Plastics

One of the biggest advantages of PA66 for thermal break strips is its exceptional mechanical strength, which far surpasses that of PVC and ordinary plastics. PVC thermal break strips often crack or deform under pressure, especially in window frames that bear weight or face wind loads. In contrast, PA66 thermal break strips maintain high tensile strength and impact resistance, even in daily use. Our team has tested PA66 alongside other materials in real-world scenarios, finding that PA66 can withstand up to 50% more pressure without damage. This strength ensures that polyamide thermal break strips made from PA66 have a longer service life, reducing the need for replacements. For customers using our one-stop service at Polywell, this advantage translates to more reliable production lines and products that meet strict international quality standards.

Exceptional Thermal Stability: Outperforming PA6 and Low-Melting Materials

PA66 also excels in thermal stability, a crucial factor for thermal break strips that operate in temperature extremes. Unlike PA6 (a similar polyamide) or low-melting plastics, PA66 has a high melting point (around 260°C) and retains its shape and insulation properties even in hot climates or near heat sources like radiators. PA6 thermal break strips, by comparison, may soften at temperatures above 220°C, leading to reduced insulation efficiency. Our research and development work since 2006 has further optimized PA66’s thermal stability, ensuring it resists thermal aging—another issue that plagues cheaper materials. When customers choose PA66 for their polyamide thermal break strips, they avoid the risk of product failure due to temperature changes, a benefit that has become a key selling point in international markets.

Strong Weather Resistance: PA66 Against UV Rays and Moisture

Thermal break strips installed in exterior windows and doors face constant exposure to UV rays, rain, and humidity—conditions that degrade many materials quickly. PA66 stands out here too, with inherent weather resistance that outperforms PVC and even some modified plastics. PVC thermal break strips often become brittle and discolored after 2-3 years of UV exposure, while PA66 thermal break strips retain their flexibility and appearance for over a decade. PA66 also resists moisture absorption, which prevents swelling or warping—common problems with materials like wood-plastic composites. As part of our Polywell one-stop service, we provide customers with PA66 materials that have undergone additional weather-resistant treatments, ensuring their thermal break strips perform well in diverse climates, from hot and humid Southeast Asia to cold European regions.

Excellent Processability: Matching Polyamide Thermal Break Strip Production Lines

Beyond performance, PA66 offers significant advantages in processability, making it ideal for integration into polyamide thermal break strip production lines. Our company partnered with an extruder and mold manufacturer to establish Polywell, and during this collaboration, we found that PA66 flows smoothly through extruders, with consistent melting and shaping properties. Unlike rigid materials that require high extrusion pressure (which wears down equipment), PA66 can be processed at moderate temperatures and speeds, reducing extruder maintenance costs. It also adheres well to metal frames (a key step in thermal break strip installation), eliminating gaps that cause energy loss. For customers using our full production line products and technology, PA66’s processability means faster production, fewer defects, and lower operational costs compared to using less compatible materials like PVC or glass fiber-reinforced plastics.

Environmental Sustainability: PA66’s Alignment with Green Trends

In today’s market, sustainability is a growing concern, and PA66 offers advantages here over non-recyclable or eco-harmful materials. PA66 is fully recyclable—scrap from polyamide thermal break strip production can be reprocessed into new materials without losing key properties. This contrasts with PVC, which releases toxic chemicals during recycling and is often sent to landfills. Our company prioritizes sustainable practices in our material supply, and PA66’s recyclability aligns with the environmental goals of many international customers. Additionally, PA66 thermal break strips contribute to energy efficiency in buildings, reducing carbon emissions by minimizing heat transfer. This dual benefit—sustainable production and energy-saving performance—has made PA66 a top choice for customers seeking to meet green building standards.

How Polywell Supports Customers in Leveraging PA66’s Advantages

At Polywell, we don’t just supply PA66 materials—we help customers fully leverage PA66’s advantages through our one-stop service for polyamide thermal break strips. This includes providing tailored PA66 formulations (optimized for strength, weather resistance, or processability), matching extruders and molds that work seamlessly with PA66, and sharing our decades of production technology. For example, if a customer is switching from PVC to PA66, our team offers guidance on adjusting extrusion temperatures and mold designs to maximize PA66’s performance. We also supply all other components of the production line, ensuring consistency from raw material to finished thermal break strip. This holistic support means customers don’t just get a better material—they get a more efficient, reliable production process that capitalizes on PA66’s strengths.

Conclusion: PA66 as the Optimal Choice for High-Quality Thermal Break Strips

When comparing materials for thermal break strips, PA66’s superior mechanical strength, thermal stability, weather resistance, processability, and sustainability make it stand out above PVC, PA6, and other alternatives. Our company’s 17+ years of research and development in thermal break strip materials, combined with Polywell’s one-stop service, ensures customers can easily adopt PA66 and deliver high-performance products to global markets. Whether you’re focused on durability, energy efficiency, or sustainability, PA66 provides the advantages needed to stay competitive in the thermal break strip industry. By choosing PA66 and partnering with Polywell, you’re not just selecting a material—you’re investing in a solution that drives quality, efficiency, and customer satisfaction.