Medical Grade Silicone Sheeting | Trelleborg

Custom Medical Grade Silicone Sheeting

For the Ultimate in Compatibility

Custom sheeting, manufactured by Trelleborg Sealing Solutions to meet customer specifications, serves a variety of medical uses:

  • Discs punched from vulcanized elastomeric sheets are key components in various types of valve assemblies
  • Mesh-reinforced sheeting is integrated as sewing rings on artificial heart valves
  • Laminated sheeting containing both vulcanized and unvulcanized layers is used to seal tissue expanders and mammary devices
  • Our knifecoating technology is used to produce custom dermal adhesive gel products for wound management and scar reduction applications

Our silicone sheeting has the following characteristics:

  • Available in LSR and vulcanized and unvulcanized HCR materials
  • Reinforced and non-reinforced options are available
  • May be bonded to itself or synthetics (polyester tricot)
  • Easily cut to desired shape
  • Autoclavable without changes in consistency, softness, or other inherent properties
  • Biologically active fluids have little or no effect on the sheeting
  • Excellent biocompatibility as evidenced by its USP Class VI clearance

Silicone Sheeting Manufacturing Processes

We produce sheeting using two different methods:

HCR Calendaring

High consistency rubber (HCR) is formed into various types of sheeting using a calendaring process, in which the silicone is fed through multiple rollers to produce a film of uniform thickness. The film is then transferred onto a carrier sheet and may be cured or left uncured. The calendaring process is capable of producing a variety of sheeting including combinations of vulcanized, unvulvanized, reinforced or non-reinforced products. Calendared sheeting may be pigmented and a number of surface finishes are possible.

Our HCR calendared sheeting is available with the following properties:

Knifecoating

Our knifecoating equipment and processes produce sheeting and films from a number of different silicone materials including liquid silicone rubber (LSR), dispersions and gels. In this process, a vacuum-assist system secures a plastic film against a precisely levelled carrier belt. Silicone material is pumped at a precise rate behind a vertical blade. As the film advances, the blade spreads the silicone into a film of the desired thickness. The carrier plastic and silicone then advances through a hot air vulcanizing (HAV) chamber where the rubber is vulcanized. A protective top sheet, fed from a reel outside the HAV, is automatically and continuously applied to the upper surface of the cured film. The cured sheeting is then spooled as finished product.

Trelleborg Sealing Solutions knifecoating capabilities are unique and offer several advantages over the more widely used calendaring process.

  • Entirely closed-loop process; silicone is pumped from sealed containers into an evacuated chamber, cured, and spooled. The risk of particulate contamination due to environmental exposure is greatly reduced.
  • The process is continuous, producing larger batch sizes at lower cost.
  • Sheeting thickness is more precise, accurate, reproducible, and capable of producing silicone film as thin as .001 inches.

Our knifecoating technology is leveraged in our line of custom dermal adhesive gel products which are widely used in applications involving wound management and scar reduction.

Our LSR knifecoated sheeting is available with the following properties: