Hongyuan Envirotech manufactures a wide range of needle felt for dust filtration. Needle felt is a type of filter material composed of different chemical fibers such as Polyester, PP, Acrylic, PPS, Aramid, fiberglass, PTFE, and P84. Our needle felt is created using a special needle punching process and high strength filament scrim. We typically apply heat setting, singed and glazed finishes to the felt surface. Additionally, we offer PTFE and water and oil repellent finishes based on customer requirements and specific applications. Our advanced equipment and technology greatly enhance the cleaning capacity, stability, and filtering precision of our filter materials, resulting in extended service life. Our needle felt finds widespread usage in various industries including Metallurgy, Chemical industry, Cement, Power plant, Medicine, and Waste incineration plant.
PPS is an excellent material for filters due to its ability to withstand high temperatures, resist acids and alkalis, and resist hydrolysis. PPS filter bags are primarily used to remove dust from air that contains acid or alkali materials at high temperatures, such as in gas cleaning at thermal power plants or fume removal in waste incinerators.
At Hongyuan Envirotech, we use top-quality PPS fiber and employ advanced techniques like fine needle punching, surface treatment, and chemical treatment to make our filter bags durable and capable of meeting the diverse filtration needs of clients in various industries.
Fiber Characteristic
| Fiber | Tensile Strength | Abrasion Resistance | Chemical Acids | Alkali Resistance | Supports Combustion | Continuous Temp(℃) | Surge Temp (℃) |
| Polypropylene | Excellent | Excellent | Excellent | Excellent | Yes | 93 | 93 |
| Nylon | Excellent | Excellent | Poor | Excellent | Yes | 93 | 93 |
| Homopolymer Acrylic | Good | Good | Very Good | Fair | Yes | 127 | 140 |
| Copolymer Acrylic | Average | Fair | Good | Fair | Yes | 110 | 120 |
| Polyester | Excellent | Excellent | Fair | Fair | Yes | 135 | 149 |
| Aramid | Very Good | Excel | Fair | Poor | NO | 191 | 218 |
| PTFE | Average | Fair | Excellent | Excellent | NO | 232 | 260 |
| Fiberglass | Excellent | Fair | Good | Fair | NO | 260 | 288 |
| PPS | Very Good | Excel | Excellent | Very Good | NO | 191 | 218 |
| P-84 | Very Good | Excel | Very Good | Fair | NO | 260 | 288 |
Layer: PPS
Scrim: PPS
Available weight: 350g/m2, 400g/m2, 450g/m2, 500g/m2, 550g/m2, 600g/m2
Treatment: Heat-set, singed and glazed, Water & Oil repellent, PTEF finish, e-PTFE membrane laminated
Service temperature: 160℃ continue, 200℃ maximum
Regular width: 2m-2.2m
Application: Thermal power plant, Coal-fired boilers, Waste incineration, Aluminum, etc.
| Spec Item | Layer/Scrim | Weight（g/m2） | Air Permeability （cm3/cm2.s) | Thickness (mm) | Warp Tensile Strength (N/50mm) | Weft Tensile Strength (N/50mm) | Warp Elong（%） | Weft Elong（%） | Treatment | Continuous Temp (℃) |
| 301KA | PPS | 500±5% | 10±25% | 1.8±0.2 | ≥800 | ≥1300 | ≤25 | ≤50 | PTFE finished | ≤160 |
| 301KM | PPS | 500±5% | 4±25% | 1.8±0.2 | ≥800 | ≥1300 | ≤25 | ≤50 | with membrane | ≤160 |
| 303KA | PPS/PTFE | 580±5% | 10±25% | 1.8±0.2 | ≥700 | ≥1100 | ≤20 | ≤30 | PTFE finished | ≤160 |
| 303KM | PPS/PTFE | 530±5% | 4±25% | 1.8±0.2 | ≥700 | ≥1100 | ≤20 | ≤30 | with membrane | ≤160 |
| 311KA | PPS+PTFE/ PTFE | 650±5% | 10±25% | 2±0.2 | ≥800 | ≥1200 | ≤25 | ≤50 | PTFE finished | ≤160 |
Hongyuan Envirotech manufactures a wide range of needle felt for dust filtration. Needle felt is a type of filter material composed of different chemical fibers such as Polyester, PP, Acrylic, PPS, Aramid, fiberglass, PTFE, and P84. Our needle felt is created using a special needle punching process and high strength filament scrim. We typically apply heat setting, singed and glazed finishes to the felt surface. Additionally, we offer PTFE and water and oil repellent finishes based on customer requirements and specific applications. Our advanced equipment and technology greatly enhance the cleaning capacity, stability, and filtering precision of our filter materials, resulting in extended service life. Our needle felt finds widespread usage in various industries including Metallurgy, Chemical industry, Cement, Power plant, Medicine, and Waste incineration plant.
PPS is an excellent material for filters due to its ability to withstand high temperatures, resist acids and alkalis, and resist hydrolysis. PPS filter bags are primarily used to remove dust from air that contains acid or alkali materials at high temperatures, such as in gas cleaning at thermal power plants or fume removal in waste incinerators.
At Hongyuan Envirotech, we use top-quality PPS fiber and employ advanced techniques like fine needle punching, surface treatment, and chemical treatment to make our filter bags durable and capable of meeting the diverse filtration needs of clients in various industries.
Fiber Characteristic
| Fiber | Tensile Strength | Abrasion Resistance | Chemical Acids | Alkali Resistance | Supports Combustion | Continuous Temp(℃) | Surge Temp (℃) |
| Polypropylene | Excellent | Excellent | Excellent | Excellent | Yes | 93 | 93 |
| Nylon | Excellent | Excellent | Poor | Excellent | Yes | 93 | 93 |
| Homopolymer Acrylic | Good | Good | Very Good | Fair | Yes | 127 | 140 |
| Copolymer Acrylic | Average | Fair | Good | Fair | Yes | 110 | 120 |
| Polyester | Excellent | Excellent | Fair | Fair | Yes | 135 | 149 |
| Aramid | Very Good | Excel | Fair | Poor | NO | 191 | 218 |
| PTFE | Average | Fair | Excellent | Excellent | NO | 232 | 260 |
| Fiberglass | Excellent | Fair | Good | Fair | NO | 260 | 288 |
| PPS | Very Good | Excel | Excellent | Very Good | NO | 191 | 218 |
| P-84 | Very Good | Excel | Very Good | Fair | NO | 260 | 288 |
Layer: PPS
Scrim: PPS
Available weight: 350g/m2, 400g/m2, 450g/m2, 500g/m2, 550g/m2, 600g/m2
Treatment: Heat-set, singed and glazed, Water & Oil repellent, PTEF finish, e-PTFE membrane laminated
Service temperature: 160℃ continue, 200℃ maximum
Regular width: 2m-2.2m
Application: Thermal power plant, Coal-fired boilers, Waste incineration, Aluminum, etc.
| Spec Item | Layer/Scrim | Weight（g/m2） | Air Permeability （cm3/cm2.s) | Thickness (mm) | Warp Tensile Strength (N/50mm) | Weft Tensile Strength (N/50mm) | Warp Elong（%） | Weft Elong（%） | Treatment | Continuous Temp (℃) |
| 301KA | PPS | 500±5% | 10±25% | 1.8±0.2 | ≥800 | ≥1300 | ≤25 | ≤50 | PTFE finished | ≤160 |
| 301KM | PPS | 500±5% | 4±25% | 1.8±0.2 | ≥800 | ≥1300 | ≤25 | ≤50 | with membrane | ≤160 |
| 303KA | PPS/PTFE | 580±5% | 10±25% | 1.8±0.2 | ≥700 | ≥1100 | ≤20 | ≤30 | PTFE finished | ≤160 |
| 303KM | PPS/PTFE | 530±5% | 4±25% | 1.8±0.2 | ≥700 | ≥1100 | ≤20 | ≤30 | with membrane | ≤160 |
| 311KA | PPS+PTFE/ PTFE | 650±5% | 10±25% | 2±0.2 | ≥800 | ≥1200 | ≤25 | ≤50 | PTFE finished | ≤160 |
