Polyester +PVC fusion and PFA welding layer: In-depth Analysis of the Heat Sealing Process for Creating excellent windproof Door Curtains

1. Characteristics of polyester + PVC fusion and its application advantages in windproof door curtains

1. Characteristics of polyester fiber

High strength and high modulus: The tensile strength of polyester fiber is usually around 5-8g/d (grams/denier), and the modulus can reach 100-150g/d, which makes it have excellent tensile resistance. In windproof door curtains, it can effectively resist strong wind pulling and prevent the door curtain from deforming or tearing.

Good elastic recovery: After being deformed by force, polyester fiber can quickly return to its original shape, and the elastic recovery rate can reach more than 90%. This ensures that the door curtain always remains flat during use, and will not wrinkle due to long-term pressure or wind, affecting the windproof effect.

Abrasion resistance: Polyester fiber has excellent wear resistance, and its wear resistance can reach tens of thousands of times. In the scenario of frequent opening and closing of door curtains, it can reduce the wear on the surface of the door curtain and extend its service life.

2. Characteristics of PVC

Waterproof and moisture-proof: PVC is a non-absorbent material with extremely low water absorption, which can effectively prevent moisture penetration. In a humid environment, it can prevent moisture from entering the door curtain, avoid problems such as mold and rot of materials caused by moisture, and ensure the normal use of the door curtain.
Corrosion resistance: PVC has good tolerance to chemicals such as acids, alkalis, and salts. In an industrial environment, it can resist the erosion of various chemicals and maintain the appearance and performance of the door curtain.
Easy to process: PVC material has good plasticity and can be made into door curtain parts of different shapes and sizes through various processing processes such as injection molding, extrusion, and calendering to meet diverse design needs.

3. Advantages of polyester + PVC fusion

Complementary performance: The high strength of polyester fiber and the waterproof, moisture-proof and corrosion-resistant properties of PVC combine to make the windproof door curtain have sufficient strength to resist wind and adapt to various harsh environments. For example, at the warehouse door of a chemical company, the door curtain made of this fusion material can withstand the erosion of chemicals and strong winds for a long time.
Cost-effectiveness: Polyester and PVC are relatively common materials with low costs. After the fusion of the two, while ensuring the performance of the door curtain, the production cost is reduced, and it has a high cost-effectiveness.

2. The role and advantages of PFA welding layer in the heat-sealing process of windproof door curtains

1. PFA material characteristics

High temperature resistance: The continuous use temperature of PFA can reach 260℃, and the short-term use temperature is even higher. During the heat-sealing process of windproof door curtains, it can withstand high welding temperatures without deformation or decomposition, ensuring the welding quality.

Chemical corrosion resistance: Similar to PTFE, PFA has excellent tolerance to various chemical substances and can be used stably for a long time in harsh environments such as acids, alkalis, and organic solvents. This makes the welded door curtains more adaptable in places such as the chemical industry.

Low friction coefficient: PFA has an extremely low friction coefficient and a smooth surface. This helps to reduce the friction resistance of the door curtain during the opening and closing process, making the door curtain operation smoother and also reducing the wear of the door curtain.

2. The role of PFA welding layer in the heat-sealing process

Realize material connection: During the heat-sealing process, the PFA welding layer acts as an intermediate medium, which is heated to melt it and tightly connect the polyester + PVC composite material together. Its good fluidity and adhesion can fill the tiny gaps between materials and form a strong welded joint.
Ensure sealing: After cooling and solidification, the PFA welding layer can form a dense sealing layer to effectively prevent the penetration of air, moisture and dust. This is crucial for windproof door curtains, which can ensure that the door curtains have good windproof, dustproof and heat-insulating properties when closed.

3. Advantages of PFA welding layer

High welding strength: The PFA welding layer has a strong bonding force with the polyester + PVC material, and the welding strength can reach more than 80% of the strength of the material itself. This ensures that the door curtain will not crack or fall off at the welding part during long-term use.
Beautiful appearance: The surface of the PFA welding layer is flat and smooth after welding, and is consistent with the color of the main material of the door curtain, which will not affect the overall appearance of the door curtain. At the same time, its low friction coefficient also makes the surface of the door curtain not easy to be stained with dirt and easy to clean.