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  2. Heat sealer - Wikipedia

    en.wikipedia.org/wiki/Heat_sealer

    Heat sealing is the process of sealing one thermoplastic to another similar thermoplastic using heat and pressure. [1] The direct contact method of heat sealing utilizes a constantly heated die or sealing bar to apply heat to a specific contact area or path to seal or weld the thermoplastics together.

  3. Plastic welding - Wikipedia

    en.wikipedia.org/wiki/Plastic_welding

    The direct contact method of heat sealing utilizes a constantly heated die or sealing bar to apply heat to a specific contact area or path to seal or weld the thermoplastics together. A variety of heat sealers is available to join thermoplastic materials such as plastic films: Hot bar sealer, Impulse sealer, etc. Heat sealing is used for many ...

  4. Induction sealing - Wikipedia

    en.wikipedia.org/wiki/Induction_sealing

    Induction sealing is the process of bonding thermoplastic materials by induction heating. This involves controlled heating an electrically conducting object (usually aluminum foil) by electromagnetic induction, through heat generated in the object by eddy currents. Induction sealing is used in many types of manufacturing.

  5. Packaging machinery - Wikipedia

    en.wikipedia.org/wiki/Packaging_machinery

    For example many packages include heat seals to prepare or seal a package. Heat sealers are needed, even in slow labor-intensive operations. With many industries, the effectiveness of the heat seal is critical to product safety so the heat sealing operation must closely controlled with documented Verification and validation protocols. Food ...

  6. Vacuum packing - Wikipedia

    en.wikipedia.org/wiki/Vacuum_packing

    The machine will remove the air and seal the bag, which is all done outside the machine. A heat sealer is often used to seal the pack. Typically these units use a dry piston vacuum pump which is often considered a "maintenance-free" pump. For sealing dry goods only, this is the preferred method.

  7. Ultrasonic welding - Wikipedia

    en.wikipedia.org/wiki/Ultrasonic_welding

    Sealing containers, tubes and blister packs are common applications. Ultrasonic welding is also applied in the packaging of dangerous materials, such as explosives, fireworks and other reactive chemicals. These items tend to require hermetic sealing, but cannot be subjected to high temperatures. [9] One example is a butane lighter.

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