The filtering bag is the key part of polishing bag filter. Our company provides high-quality filter bags to ensure identical filtration. The filter bag is made of fiber material such as polypropylene, polyester, tetrafluoroethylene, nylon, wool, with filtering accuracy 1-1000μm. Selection of the filters depends on different medium, chemical resistance and temperature –resistance demands as detailed in the following table:

Bag material	Bag material							heat-resistance℃
Bag material	water	aliphat	aromatic	basicity	thick base	acidity	strong acid	heat-resistance℃
PP	△	△	-	△	△	△	△	110
Wool	△	△	△	-	-	-	-	135
Binding fiber	△	△	△	△	-	△	-	160
Polyester	△	△	△	△	△	-	△	190
Polyamine	△	△	△	△	△	-	-	190
PTFE	△	△	△	△	△	△	△	260

Note: Δ good performance
According to the differences of filters, our company can provide three kinds of optional filters with different material, filtering accuracy and filtering efficiency.
1、Single and multiple filament filter bag
The bag is a surface filtration textile structure formed by high temperature to prevent pore expansion during filtration, to ensure absolute filtering accuracy grade, capturing dust on the surface. The bag can be cleaned for application in many times.
2、Needle punched filter bag
Based on deep filtering principle, such needle punched filter bag can be used for filter large quantity of solids or soft spawn.100% purified fibers are needle punched to 3-D filtering layer. Big grain particle are captured on the surface and small grain particle are captured in the deep structure. The filtering accuracy is from1~220μm. The needle punched filter bag features low cost, big filtering area and small pressure difference. It is an economical filtration mode. The surface of needle punched filter bag is particularly to ensure no fiber dropping. But such bag cannot be washed for further use.
3、Fused non-woven fabric filter bag
The fused filter bag is a kind of non-woven fabric filter element composed of multiple layers of Polypropylene. The inner layer is needle punched Polypropylene fabrics for primary filtration, the middle layer is composed of Polypropylene micro-fabrics fused non-woven fabrics with filtering accuracy for 1~100μm, filtering efficiency for 98%. The external layer is composed of polypropylene adhesion fabrics with functions of high strength without fiber dropping. Filtration reaches 1,3,5,25,50 and 100μm respectively.
■Denotation of bag filters

■Bag dimension:

Size	Diameter mm	Length mm	Surface m2
P1X	ф101.8	215	0.08
P2X	ф101.8	430	0.16
P1S	ф177.8	430	0.24
P2S	ф177.8	860	0.48

■Press ring

Code	Material	Max working temperature℃
L	Polytene	150
P	Polypropylene	110
E	polyester	180
Z	Santodrene	100

Example: P0-5-p2p denotes standard 5μm Polypropylene needle punched bag, double with filament length with Polypropylene press ring.
Parameters of filter bags

Material	Type	Code	suitable filter μm
Material	Type	Code	1	3	5	10	15	25	50	75	80	100	125	150	200	250	300	400	600	800	1000
PP	Needle punched	PO	△	△	△	△	-	△	△	-	-	△	-	△	-	-	-	-	-	-	-
	Single filament	PMO	-	-	-	-	-	-	-	△	-	△	△	△	△	△	△	△	△	△	△
	Fused non-woven fabric	MBP	-	-	-	△	-	△	-	-	-	-	-	-	-	-	-	-	-	-	-
	Fused non-woven fabric	ABP	△	△	△	△	-	△	△	-	-	-	-	-	-	-	-	-	-	-	-
	Needle punched	POXL	△	△	△	△	-	△	△	-	△	-	-	-	-	-	-	-	-	-	-
Wool	Needle punched	W	△	△	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Gel fabrics	Needle punched	VA	-	-	△	△	-	△	△	△	-	△	-	△	-	-	-	-	-	-	-
Polyester	Needle punched	PE	△	-	△	△	△	△	△	△	-	△	-	△	△	-	-	-	-	-	-
	Single filament	PEMO	-	-	-	-	-	-	△	△	-	△	△	△	△	△	△	△	△	△	△
	Needle punched	PEXL	△	-	△	△	-	△	△	-	-	△	-	-	-	-	-	-	-	-	-
	Needle punched	PEA	△	-	△	△	-	△	△	-	△	△	-	-	-	-	-	-	-	-	-
	multiple filament	PEMU	-	-	-	-	-	-	-	-	-	△	-	△	-	△	-	△	△	△	-
Nylon	Needle punched	N	-	-	△	△	-	△	△	-	-	△	-	-	-	-	-	-	-	-	-
Nylon	Single filament	MNO	-	△	△	△	△	△	△	-	△	△	△	△	△	△	△	△	△	△	△
PTFE	Needle punched	PT	△	-	△	△	-	△	△	-	-	-	-	-	-	-	-	-	-	-	-
PTFE	Single filament	TMO	-	-	-	-	-	-	-	△	-	△	△	△	△	△	△	△	△	△	-

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