product detail

20210809153337_795

Material:

Polypropylene needle punched filter felt is generally made of 3D or 6D polypropylene short fibers, woven with high-strength silk to enhance the base of the fabric . Afterwards, it is goes through post treatment processes such as needle reinforcement, calendaring, and heat setting.

Advantage:

In addition to some advantages of ordinary needle punched filter felt, Polypropylene needle punched felt is generally used in situations with flue gas temperature below 100 ℃ and in environments with high acidity or alkalinity . It another main application is in liquid-solid separation fields with high acidity or alkalinity, due to its superior acid alkali resistance and lower softening point compared to polyester fiber.

In terms of liquid filtration, polypropylene needle punched felt filter bags are usually equipped with liquid-solid separation equipment such as plate and frame filter presses, vacuum suction filters, bag filters and centrifugal filters. It has the following characteristics; good dimensional stability, high strength and long service life. It also has an advantages of low resistance and easy cleaning process.

Application:

Polypropylene needle punched filter felt is mainly used in liquid-solid separation fields in industries such as metallurgy, mining, petroleum, chemical industry, chemical fiber, pharmaceutical, food etc.

Specifications

Product	PP felt
Fiber	100%PP
Base fabric	100%PP
Square gram weight	450g/m2
Thickness	1.7mm
Density	0.26g/cm3
Air permeability	140L/dm2.min
Breaking strength - longitudinal	≥1200 N/5cm
Breaking strength - transverse	≥1200 N/5cm
Elongation @ 200N/5cm - Longitudinal	＜5%
Elongation @ 200N/5cm - Lateral	＜5%
Heat shrinkage	1%
Blasting strength	＞300 N/cm2
Continuous working temperature	90℃
Instantaneous working temperature	100℃
Post treatment	heat setting, sintering and pressing

FAQ

Q
What is the grammage (GSM) range for this polypropylene (PP) needle-punched felt filter material? What are the common specifications?
A
Our PP needle-punched felt filter material is available in multiple specifications ranging from 350 GSM to 600 GSM, such as 450 GSM, 500 GSM, 550 GSM, and 600 GSM. You can select based on your specific requirements for filtration precision, abrasion resistance, and durability.
Q
What are the primary characteristics and advantages of PP needle-punched felt filter media?
A
PP needle-punched felt filter media offers excellent acid and alkali resistance, good abrasion resistance, and minimal hydrolysis in humid environments. Additionally, it is relatively cost-effective, making it an ideal choice for handling non-corrosive dust at ambient temperatures.
Q
What are the normal continuous operating temperature and maximum instantaneous temperature for this filter material?
A
PP filter bags typically have a continuous operating temperature ≤90°C and can withstand instantaneous temperatures up to approximately 100°C. Note that exceeding these temperatures may cause the filter bags to soften and deform.
Q
How does PP needle-punched felt fare against chemical corrosion?
A
PP exhibits excellent resistance to most acids, alkalis, and chemical solvents (e.g., hydrochloric acid, sulfuric acid, hydrofluoric acid), making it highly suitable for environments with corrosive dust or fumes, such as chemical processing and electroplating.
Q
In which industries or applications is this filter material typically used?
A
It is widely applied in acid/alkali dust control and material recovery across industries like chemical production, electroplating, battery manufacturing, non-ferrous metal recycling, and wastewater treatment. It performs exceptionally well under ambient temperatures, humid conditions, and chemically corrosive environments.