Common materials for plate-and-frame filter cloths include polyester, polypropylene, nylon, vinylon, and acrylic.
Polyester filter cloths are characterized by high strength, good elasticity, and good heat resistance; they can be used for extended periods at temperatures around 130°C. They also exhibit good chemical stability-being resistant to acids and weak alkalis-and are commonly used in general filtration applications.
Polypropylene filter cloths are lightweight, possess excellent chemical corrosion resistance, absorb almost no water, and offer good electrical insulation. However, they have poor light resistance and are prone to aging, making them suitable for filtration scenarios where weight is a factor and chemical conditions are not overly harsh.
Nylon filter cloths feature high strength and exceptional abrasion resistance-ranking highest among all fibers in this regard. However, their heat resistance is relatively poor (operating temperatures generally should not exceed 80°C), so they are typically used in filtration applications requiring high abrasion resistance.
Vinylon filter cloths have high hygroscopicity and good resistance to acids and alkalis, as well as decent light and aging resistance. However, their elasticity is relatively low, and they are often used in filtration fields where moisture absorption is a requirement.
Acrylic filter cloths offer excellent light resistance and strong weatherability, though they have lower strength and average abrasion resistance; they are suitable for filtration scenarios that demand high light resistance.