Polypropylene needle punched felt is widely used in the liquid filtration industry, based on the excellent acid resistance, alkali resistance, and hydrolysis stability of polypropylene fibers. It is the best choice for pharmaceuticals, chemicals, and other fields. The shortcomings lie in the low softening point of polypropylene and its photosensitivity, so we can only use it under conditions where the temperature requirements are not high and the working environment is relatively closed without direct sunlight exposure.

Choose different needle punched felt according to the mining industry. Our company’s products mainly include regular polypropylene needle punched felt and high-strength needle punched felt. Different from the base fabric used in the needle punched felt composite layer, it affects the overall strength of the filter material.

For different customer groups, our equipment can produce products with a weight of 300g/㎡ to 750g/㎡ and a thickness ranging from 1.2cm to 4.5cm. The width is also selective, with a maximum width of 2.8m

Material		Ordinary base fabric		High strength base fabric
Gram weight (g/m2)		500	600	650
Thickness (mm)		2.1	2.3	2.5
Air permeability (L/m2/S)		200	150	110
Fracture strength (N/5 × 20cm)		≥1050	≥1200	≥1650
	Latitude	≥1500	≥1800	≥2150
Fracture elongation (%)		< 35	< 35	< 35
	Latitude	< 55	< 55	< 55
Tensile strength at break (Mpa/min)		2.32	2.57	2.86
Operating temperature (℃)		≤90	≤90	≤90
Instantaneous operating temperature (℃)		110	110	110
Acid resistance		Excellent	Excellent	Excellent
Alkali resistance		Excellent	Excellent	Excellent
Abrasion		Excellent	Excellent	Excellent
Hydrolytic stability		Excellent	Excellent	Excellent
Post processing method		Burnt and calendered		Burnt and calendered