Sure-2-Vent® is a high-performance venting liner manufactured by DeWAL Industries using its own Poro-Tex® (expanded Teflon®) membrane. This allows positive or negative pressure of closed containers to equalize without leaking their aqueous liquid. This product works on all conventional containers, and even multi-chambered bottles.

Our unique design uses a polyfoam liner, which is either perforated or porolated and laminated to a fully faced expanded PTFE porous membrane. This allows the gas to be vented through the liner while keeping the liquid contained. The number of venting ports can be varied to meet customer expectations on volumes of gas to be vented. The Poro-Tex® membrane is specifically designed to allow high volumes of gas through while retaining the liquid in the container.

Covering the entire face of the liner with a membrane made with Teflon® and utilizing multiple venting ports per closure ensures the highest reliability of product available. There is no worrying about each closure having a venting port, or if the membrane is sealed. There are no issues with the surface smoothness or the lining up of the vents in multi-chamber bottles.

Our liners allow you to use them in your current process. There is no indexing of the liner and you can run your equipment at standard speeds. Because our liner is not indexed, the amount of closures lined per linear yard of material used is greater than with indexed products.

Teflon® is a registered trademark of DuPont.

Skived / PTFE

• Highest Reliable Product Available
• High Performance Standards (ISO 9001-2000 Certified)
• Child-Resistant Applications
• Multiple Chamber Containers
• Economical
• Engineered Products
• Other Products
  

  The following are standard Sure-2-Vent® liners currently available:

  D/W 952 Series – For sealing holes in Caps. Poro-Tex membrane with either a polypropylene or polyethylene porous backer. The backing material allows for sealing to the cap of the same type of material. This enables pressure to equalize, yet keeps liquids contained.

  D/W 953 Series – For Child-Proof Closures. Employs a flat backed polyfoam liner with perforated holes and a fully faced Poro-Tex ePTFE membrane. Used for standard closures with a hole. For medium volume removal of pressure for liquid-filled containers.

  D/W 954 Series – For Conventional Closures. Uses a flat backed polyfoam liner with porolated holes and a fully faced Poro-Tex ePTFE membrane. Used for Child-Proof closures and closures with a hole, for high volume removal of pressure for liquid-filled containers. Patent Pending.

  D/W 956 Series – For any style closure, including childproof, hole in the top of closure, or standard cap closure. Uses trilayer material with full face ePTFE liner to vent high volume pressure in container. Patented Product.

  D/W 957 Series – For Horizontal Venting. Uses a flat polyfoam liner with a fully faced Poro-Tex membrane on both sides. For horizontal venting of gas in spray bottles. Patented Product.