Applications

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heat seal packaging
Bag & Pouch   Learn More
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heat seal packaging
Bowl & Cup   Learn More
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tray blister for packaging
Trays & Blisters   Learn More
Bag & Pouch Sealing

United Silicone provides silicone seal bars (also referred to as “jaws”) for heat sealing bag and pouch applications. Our silicone formulations are thermally conductive and heat tolerant. Thermal conductivity helps transfer heat to the jaw surface for a secure seal. Temperature tolerance allows our silicone to maintain its structure- not becoming “sticky” or “gummy” when exposed to sealing heat. The temperature tolerance of our formulations eliminates the need for wrapping silicone seal bars in Teflon cloth and tape, resulting in significant cost and time savings.

Typical applications include:

  • Food — side, top, bottom and fin seals
  • Medical – IV bag seals, wound care, liquid medication dispensing capsules
heat seal packaging
Bowl & Cup Sealing

United Silicone’s high-performance silicone seal heads and silicone support fixtures provide efficient, superior seals on a number of tray and rigid packaging applications. Our thermally conductive seal heads are available with magnetic mounting systems, enabling up to 90x faster changeovers and up to 50% improvement in mounting accuracy.

Typical applications include:

  • Yogurt
  • Single serve microwaveable foods
  • Convenience foods
  • Creamers
  • Single serve soups
  • Fruit cups
  • Single serve drinks – shots and wine
Trays & Blisters

Generally speaking, the thermoforming process used to create trays and blisters is less precise than the injection molding process used to make cups and bowls. United Silicone’s high-performance silicone heads and silicone support fixtures are well-suited to handle the resulting variability in packages. Our unbonded silicone fixture/gaskets are continuous and eliminate the voids or leaks caused by extruded lengths.

 

Typical applications include:

  • Medical – surgical instruments in thermoformed trays
  • Food – single serve and family-size convenience meals
  • Consumer – blister packs (batteries, cosmetics, etc)

 

support fixture for heat seal
Dedicated Features & Services

Silicone Seal Heads (rigid packaging)

  • Magnetic Quick Change Head
    -Changes in 30 seconds vs. 30 minutes
    Specialty Silicone Formulations
    -Specially designed for optimal performance in high speed rigid packaging applications
  • Crowned, Contoured, Dual Durometer & Dual Level Seal Heads
    -Ensure highly repeatable, precision seals without leakers
  • Silicone Seal Bar Assemblies (flexible packaging)
  • Compression Molded Silicone
    -4x superior thickness tolerance,  7x longer lifespan compared to extruded silicone
  • Industry Leading Size Range
    -1 to 110 inches, flat and textured surfaces
  • Market-Leading Bond Strength
    -Proprietary process  chemically bonds Silicone-to-metal or Teflon-to-metal eliminating need for adhesives
  • Eliminate Teflon Tape
    -High heat tolerance (550°F), Silicone won´t become sticky/gummy
  • Eliminate Leakers
    -Crowned designs eliminate air holes / leakers. Ideal for long seal bars.

Silicone Seal Bar Assemblies (flexible packaging)

  • Compression Molded Silicone
    -4x superior thickness tolerance
    -7x longer lifespan compared to extruded silicone
  • Industry Leading Size Range
    -1 to 110 inches
    -Both flat and textured surfaces
  • Market-Leading Bond Strength
    -Proprietary process
    -Chemically bonds Silicone-to-metal or Teflon-to-metal
    -No need for messy adhesives
  • Eliminate Teflon Tape
    -High heat tolerance (550°F)
    -Silicone won´t become sticky/gummy
  • Eliminate Leakers
    -Crowned designs eliminate air holes / leakers. Ideal for long seal bars.

Considerations

Rigid & Flexible Packaging-Sealing Challenges

We understand the challenges commonly associated with rigid and flexible packaging applications. United Silicone’s customer and technical support staff can provide insight on the following areas:

Repeatable Quality Seals

  • How to ensure maintenance of temperatures on high-speed lines for optimal sealing part after part
  • Identification of the best silicone formulation and ideal durometer for each application

Enhance Efficiency

  • Simple Seal Head and Seal Bar changeovers
  • Alternatives to time consuming Teflon tape
We would love to learn more about your package sealing challenge