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PA66GF25 Insulation Profiles are the flagship product of Shuangming Plastic, engineered as high-performance Glass-Filled Polyamide Strips with 25% glass fiber reinforcement in nylon 66 base material. Manufactured via advanced extrusion technology, these profiles strictly comply with the national standard GB/T 23615.1-2009, with our self-developed SM-Technical specification exceeding industry benchmarks in all core parameters. As professional PA66GF25 Thermal Break Strips, they are designed to block heat transfer pathways, eliminate thermal bridges and provide structural reinforcement for metal profile systems. Our Nylon 66 GF25 Insulation Strips feature one-piece molding, stable dimensionality and long-term performance in extreme environments, making them the first choice for energy-saving construction and industrial thermal management projects. All raw materials adopt 100% in-house polymer compounding, ensuring consistent quality from production source to finished products.
Model NO. | SM-C120-A | Material Properties | High Temp Resistance (≥220 °C) |
Material | PA66GF25 | Customized | Customized |
Application | for Thermal Break Aluminum Profile | Color | Single Color(Black) |
Markets Served | Windows & Doors | Technical Performance | GB/T 23615.1-2009 |
Customized Laser Printing | Transport Package | Roll or Linear | |
Forming Way | Extrusion | Trademark | Shuangming |
PA66GF25 Glass-Fiber Reinforced Nylon Strips with a cavity can provide better thermal insulation.

The base material of PA66GF25 Insulation Profiles is high-purity nylon 66, reinforced with 25% high-quality glass fiber for enhanced structural toughness. It boasts high temperature resistance (≥220 °C) and a melting point of ≥255 °C (0.45MPa), far exceeding ordinary polyamide strips. The Vicat softening temperature reaches ≥240 °C, maintaining stability under long-term high-temperature working conditions.
With a thermal conductivity of only 0.25 W/m·K, our PA66GF25 Thermal Break Strips are 500 times lower than aluminum, effectively cutting off heat conduction in metal profile systems and greatly improving the energy efficiency of buildings and industrial equipment.
The density of the profiles is controlled at 1.28-1.35g/cm³, with longitudinal tensile strength ≥84MPa and transverse low-temperature tensile strength ≥85MPa. They remain flexible at -40°C and pass 50 freeze-thaw cycle tests without cracks, ensuring reliable performance in cold regions.
Durable Weather & UV Resistance: The profiles withstand long-term exposure to rain, snow and humidity, maintaining optimal thermal insulation and structural performance for decades, and realize noise reduction while insulating.
Galvanic Corrosion Prevention: Isolating direct metal-to-metal contact, PA66GF25 Insulation Profiles have a volume resistivity >10⊃1;⁵ Ω·cm, eliminating galvanic corrosion risks and extending the service life of fenestration systems.
Customizable Design: Support custom laser printing, single/multi-color matching and personalized profile sizes, seamlessly integrating with various architectural and industrial designs.
Inherent Flame Retardancy: The fire-retardant properties inhibit combustion and flame spread, enhancing the fire safety of supporting systems.
Full-process Quality Control: A comprehensive inspection system covers raw material testing to finished product delivery, ensuring each batch meets strict quality standards.
Shuangming Company has a comprehensive quality inspection system covering the entire production process from raw materials to finished Glass-Filled Polyamide Insulation Strips.

NO. | Item | Unit | GB/T 23615.1-2009 | SM-Technical specification |
1 | Density | g/cm³ | 1.3±0.05 | 1.28-1.35 |
2 | Linear expansion coefficient | K⁻⊃1; | (2.3-3.5)×10⁻⁵ | (2.3-3.5)×10⁻⁵ |
3 | Vicat softening temperature | °C | ≥230 | ≥240 |
4 | Melting point(0.45MPa) | °C | ≥240 | ≥255 |
5 | Testing for tensile cracks | - | No cracks | No cracks |
6 | Shore hardness | - | 80±5 | 80-85 |
7 | Impact strength(Unnotched) | KJ/m² | ≥35 | ≥40 |
8 | Tensile strength(longitudinal) | MPa | ≥80 | ≥84 |
9 | Elasticity modulus | MPa | ≥4500 | ≥4600 |
10 | Elongation at break | % | ≥2.5 | ≥4 |
11 | Tensile strength(transverse) | MPa | ≥70 | ≥80 |
12 | High temperature tensile strength(transverse) | MPa | ≥45 | ≥50 |
13 | Low temperature tensile strength(transverse) | MPa | ≥80 | ≥85 |
14 | Water resistance tensile strength(transverse) | MPa | ≥35 | ≥45 |
15 | Aging resistance tensile strength(transverse) | MPa | ≥50 | ≥60 |
Polyamide nylon 66 thermal insulation strips can be supplied in coil (reel) packaging or straight-length packaging.

PA66GF25 Insulation Profiles are widely used in core fields requiring thermal insulation and structural strength:
Architectural Industry: Thermal break for aluminium windows, curtain walls and door frame systems, the core material for energy-saving green buildings;
Automotive Industry: Thermal management and lightweighting components, providing precise insulation for automotive metal structural parts;
Home Appliances & Electronics: Precision thermal insulation parts for electrical equipment, avoiding heat transfer affecting equipment operation.
A: They maintain flexibility at -40°C and pass 50 freeze-thaw cycle tests without any cracks.
A: With a thermal conductivity of 0.25 W/m·K, it is 500 times lower than aluminum.
A: They isolate direct metal contact and have a volume resistivity >10¹⁵ Ω·cm, forming an effective insulating barrier.
A: Yes, we adopt 100% in-house polymer compounding to ensure raw material quality and stability.
If you are looking for high-quality PA66GF25 Insulation Profiles and customized Thermal Break Strips solutions, Shuangming Plastic provides one-stop technical support and after-sales service.