Heat resistance and heat insulation markets

For filter bags

Nittobo's glass filter bags excel in heat resistance, corrosion resistance, and chemical stability compared to other synthetic fiber bags.

Filter bags are used to prevent pollution, improve labor environment, and collect valuable powder discharged from cement, chemicals, and other factories. The filter cloth, the heart of the filter bag, is required to be less costly and collect dust efficiently.
In particular, glass filter bags excel in heat resistance, corrosion resistance, and chemical stability compared to other synthetic fiber bags.
Various methods of weaving and treatment are used for Text Glass™ filter bag cloth to meet diverse customer requests.

Typical treatment methods

Treatment name Characteristics of treatment
TRITEMP™2 This is the most widely used treatment method. Even in a high-temperature gas environment,
1. It is flexible and can be used continuously.
2. It improves dust detachability.
ST-4A This treatment increases resistance to acids and chemicals.

Characteristics of various types of filter cloth

Item
Materials		 Characteristics of fibers Characteristics of filter cloth
Tensile
strength
(g/d)		 Elongation
percentage
(%)		 Specific
gravity
(-)		 Acid
resistance		 Alkali
resistance		 Maximum
temperature
for use
E glass 4.0 ~ 5.5 3 ~ 4 2.54 ○ ○ 280℃
Teflon 1.0 ~ 2.5 25 ~ 50 2.1 ◎ ◎ 250℃
Aramid 4.5 ~ 5.5 35 ~ 50 1.38 △ ○ 200℃
Polyester 4.3 ~ 6.0 20 ~ 32 1.38 ○ △ 140℃
Acryl 3.2 ~ 5.0 12 ~ 20 1.14 △ ○ 140℃
Nylon 6.6 5.3 ~ 6.4 28 ~ 38 1.14 × ○ 140℃
  • * The values listed above indicate reference ones at standard times, and are not guaranteed ones.

Specifications (standard)

Product code Manner of weaving Thickness
mm		 Width
mm		 Weight
g/m²		 Density
(/25mm)		 Tensile strength
(N/25mm)		 Length
m		 Ventilation rate
cm³/cm²
/sec
Warp Weft Warp Weft
KS4155/
TRITEMP™2		 Twill 0.42 965 485 41 30 >2400 >2400 100 32.0
KS4325/
ST-4A		 Double 0.85 1170 880 48 48 >2200 >1700 61.5 10.0
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