SOFT CHEM Modified PTFE Gasket — Expanded PTFE Sealing Sheet
Modified PTFE Gasket — SOFT CHEM — multi-directional expanded PTFE sealing sheet engineered for ultra-high chemical resistance, exceptional creep-resistance, and reliable sealing at low bolt loads for industrial, food & pharm, and glass-lined systems.
Description
SOFT CHEM modified PTFE gaskets combine the chemical inertness of PTFE with improved creep resistance and superior conformability. Designed for aggressive chemical environments, glass-lined systems and low-bolt-load applications where reliable, contamination-free sealing is essential.
Key benefits
- Ultra-high chemical resistance — compatible across a wide range of acids, alkalis and solvents.
- Multi-directional expanded PTFE structure for excellent compressibility and recovery at low bolt loads (Soft-Chem style).
- Modified/filled options (glass microspheres, carbon, bronze, graphite, etc.) to reduce creep and improve pressure/temperature performance.
- Low particle shedding & cleanroom packaging options for food, pharma and semiconductor use.
- Easy to cut/shape on site — supplied as sheets or pre-cut gaskets for standard flange forms (FF, SR, TG).
Typical applications
Sealing gaskets for chemical plants, glass-lined reactors, plastic/FRP flanges, food & beverage processing, pharmaceutical equipment, filtration housings, and where low bolt load, reusable, and chemically resistant gaskets are required. Also used as die-cut gaskets, washers, and custom shapes for retrofit work.
Why choose SOFT CHEM modified PTFE
Compared with virgin PTFE, modified ePTFE sheets like SOFT CHEM keep the chemical inertness while offering better sealing at low compressive loads, improved resistance to cold flow and superior adaptability to uneven flange faces — reducing leak risk and re-tightening cycles in corrosive service.
Typical technical specifications
| Basis composition | Multi-directional expanded PTFE | Sheet size | 1500×1500 mm | |||
| Color | White | Thickness | 1.5 mm,2.0 mm,3.0 mm | |||
| Certificates | Conforms to the regulation(EU), No.1935/2004(incl.10/2011), FDA conformity(components of KLINGER®soft-chem complies with the FDA requirements) |
Tolerances Thickness:±10% Length:±50mm Width:±50mm |
||||
| Industry | ||||||
| General industry/Chemical/Oil&Gas/Energy/Infrastructure/Pulp&Paper/ Marine/Automotive/Food&Beverage/Pharma |
||||||
| TECHNICAL DATA-Typical values for a thickness of 2.0 mm | ||||||
| Compressibility | ASTM F36M | % | 55 |
|---|---|---|---|
| Recovery | ASTM F36M | % | 15 |
| Stress relaxation (DIN 52913) | 30 MPa, 16h / 150℃ | MPa | 15 |
| KLINGER cold/hot compression (25 MPa) | thickness decrease at 23℃ | % | 35 |
| KLINGER cold/hot compression (25 MPa) | thickness decrease at 150℃ | % | 30 |
| Tightness | DIN 28090-2 | mg/(s × m) | 0.01 |
| Density | g/cm³ | 0.9 |
Applications & industries
- Chemical processing & corrosive service lines (acid/alkali tanks).
- Glass-lined reactors and vessels (sealing against fragile linings).
- Pharmaceutical & food (FDA/EU-compliant grades available).
- Semiconductor & wet-process equipment (low particle, clean packaging).
Download Datasheet：
Lumiglas-soft-chem-ePTFE-Datasheet
