During the material selection and manufacturing of pleated invisible screen doors and windows, the physical properties of the mesh directly dictate the durability of the final product and the user experience. According to recent technical feedback and rigorous evaluations from leading domestic screen window manufacturers, a systematic analysis has been conducted to address the industry inquiry: why PET material is rarely selected for pleated screen meshes.

1. Physical Bottlenecks of PET Material in Pleated Applications

Research and testing data demonstrate that PET material suffers from two major, irreversible performance deficiencies when integrated into folding structures:

• Susceptibility to Permanent Creasing: After undergoing prolonged, repeated mechanical folding, PET material is highly prone to developing sharp, irreversible creases. This not only severely compromises the flatness and aesthetics of the screen but also increases friction during extension and retraction.

• High Risk of Low-Temperature Brittleness: In cold environments, the molecular flexibility of PET material drops significantly. When subjected to bending or compression under low temperatures, it becomes highly brittle and prone to fracturing, which drastically shortens the lifespan of screen windows in cold regions.

2. Material Advantages and Superiority of PP (Polypropylene)

In contrast, industry experts and professional customers generally recognize that PP material offers far superior adaptability for pleated screen meshes. Its core strengths are manifest in the following dimensions:

• Exceptional Softness and Fatigue Resistance: PP material inherently possesses excellent toughness and high mechanical fatigue strength. Its exceptional flexibility allows it to withstand thousands of folds without snapping, perfectly matching the high-frequency operational demands of pleated screens.

• Shallow Creasing and Outstanding Resilience: Even after long cycles of alternating folding and unfolding, PP mesh retains only minimal, shallow crease marks. Combined with excellent shape-memory and spring-back resilience, it ensures the screen surface remains neat and structured over time.

Conclusion

In summary, due to fundamental differences in fatigue life, environmental adaptability, and deformation recovery, PP material exhibits comprehensive performance that is vastly superior to PET for professional pleated invisible screen window manufacturing, making it the preferred choice for discerning market clients.