Polypropylene filter bag (PP filter bag)

Polypropylene filter bag (PP filter bag) is a bag-shaped filtering element made of polypropylene material. The filtering material forms a three-dimensional, highly fluffy structure with intricate and convoluted filtering layers. Its characteristics include loose fiber structure, significantly increasing the capacity to hold impurities. This fiber material operates on a complex interception mode effectively removing solid and soft particles. Larger particles are trapped on the surface of the fibers, while finer particles are captured deep within the filtering material, ensuring high filtration efficiency without risking damage due to increased pressure. Additionally, surface heat treatment, using instantaneous sintering technology, effectively prevents fiber loss due to high-speed liquid impact during filtration. This not only ensures no fiber detachment causing liquid contamination but also avoids premature clogging of filter pores due to traditional roll pressing, thereby extending the life of the filter bag while maintaining low pressure drop without affecting flow rate.

Polypropylene filter bag  has the following advantages:

1.Stitching Method: Ultrasonic welding or sewing.

2.Sealing Ring: Polypropylene and polyester SDS, STS, galvanized steel ring, or stainless steel ring.

3.Sealing Ring Connection Method: Ultrasonic welding or sewing.

4.Filtration Accuracy Range: 1, 3, 5, 10, 25, 50, 75, 100, 150, 200 microns.

5.Efficiency: Relative accuracy, single-pass filtration efficiency of 85%.

6.Surface Treatment: Smooth surface treatment to prevent fiber and leaching material detachment.

7.Material Grade: Fully compliant with FDA grade requirements, free from silicon and other types of contaminants.

8.Replace when pressure drop reaches 0.10MPa, replacement pressure drop should not exceed 0.18MPa.

9.Also has extensive chemical compatibility.

Since polypropylene filter bags are typically used in conjunction with filters, they need to be replaced after a period of use. The replacement cycle for polypropylene filter bags can be determined by the following methods:

1.Roughly determine the replacement time based on experience.

2.Install pressure gauges on the inlet and outlet pipes of the bag filter and determine the replacement time based on the pressure difference displayed by the gauges. Generally, the pressure difference that filter bags can withstand is around 0.5~1kg/cm². When the pressure difference reaches this range, the filter bag should be replaced promptly to avoid rupture and ensure filtration effectiveness. Do not overlook minor issues that could lead to major problems.

Polypropylene filter bags are widely used in the food industry, wastewater treatment, fine chemicals, dyeing, ceramics, pharmaceuticals, smelting, and other industrial filtration processes. Shanghai Sffiltech  Co.,Ltd is a professional manufacturer of polypropylene filter bags, offering a wide range of product models, high filtration accuracy, competitive prices, and superior quality. Welcome to contact us for purchase.