Development of biaxially stretched microporous expanded PTFE membrane in continuous roll form
Feasibility cum RFI response for DRDO’s TDF projects
DRDO has successfully developed a structural firefighting suit (SFFS) and transferred the technology to industries for mass production. A key component of the SFFS is the moisture barrier layer, which must meet both national and international standards for flame retardancy, waterproofing, and breathability.
To achieve this, the moisture barrier layer is created by laminating Biaxially Stretched Microporous Expanded PTFE with a durable base fabric. This innovation stems from advanced fire protective textile and polymer engineering technology.
The project focuses on developing a scalable process for producing Biaxially Stretched Microporous Expanded PTFE membranes in continuous rolls, ensuring large-scale manufacturing efficiency.
Functional and Operational Requirements
Development of a process to prepare Biaxially Stretched Microporous Expanded PTFE membrane in continuous role form at a large scale to be developed and produced as per the following specifications:
A.) Weight (g/m2): 20-30
B.) Pore size of the expanded PTFE membrane should be less than 1 um.
D.) Hydrostatic head pressure: 400 mbar
E.) Tensile strength (N/cm), minimum 4.00 (N/cm) in length and 8.00 (N/cm) in width.
F.) Vertical Bum test: No drip or afterglow.
G.) Water Vapour transmission rate (WVTR) invert (g/m2/24hr): 15000-20000 (ASTM E-96 inverted cup method)
H.) WVTR upright (g/m2/24hr): 700 or more
Testing and Certification Requirements
The testing and certification for the development of biaxially stretched microporous expanded PTFE membrane in continuous roll will include flame resistance, waterproofing, breathability, and durability tests.
Certification is required from NABL, CEMILAC and BIS.
Link to know more and apply: https://drdo.gov.in/drdo/feasibility-cum-rfi-repsonse-tdf-projects