ASTM F2029 Heatsealability
Standard Practices for Making Heatseals for Determination of Heatsealability of Flexible Webs as Measured by Seal Strength
Laboratory Heat Sealers are specialised test machines primarily designed for making controlled heat seals with flexible heat sealable materials e.g. plastic films, laminates, foils, and coated paper, in preparation for seal strength testing. RDM Models HS-2, HSG-3 & HSG-5 are appropriate.
The HS-2 was one of the first machines to be introduced to the market in the 1980’s, originally by British Cellophane Limited (BCL), and later by RDM Test Equipment. The machine has undergone many updates, but the principle of operation remains the same.
Depending on the model selected, the machine will be fitted with a heated upper sealing jaw, and either an unheated lower sealing bed (HS-2 Single) or a heated lower sealing bed (HS-2 Dual) with optional interchangeable sealing jaws.
The HS-2 comprises a set of sealing jaws, PID temperature controlled heating block(s) and controller(s), a pneumatic piston drive system to deliver the sealing pressure, a pressure transducer calibrated to display the sealing pressure, a precision pressure regulator for adjustment of sealing pressure, a digital dwell time controller, and a cycle time controller.
Optional sets of sealing jaws can be provided for a variety of different surface profiles (e.g. matched crimp, castle), and surface materials (e.g. brass, stainless steel, silicon rubber).
Sealing jaws are manufactured in aluminium as standard, and optionally can have a permanent Teflon coating or PTFE tape applied to reduce build-up of print/sealing material debris. The machine can be manually loaded with heat sealable film, and will produce temperature, pressure, dwell time controlled heat seals.
For precise measurement of heat sealability of flexible packaging. Produces seals up to 50mm long x 5 to 25mm wide.
For production of high quality heat seals in flexible packaging. Produces seals up to 650mm long x 5 to 25mm wide.
For production of heat seals and/or measurement of heat sealability of flexible packaging. Produces seals up to 300mm long x 5 to 25mm wide.
For production of high quality heat seals and/or precise measurement of heat sealability of flexible packaging. Produces seals up to 300mm long x 5 to 25mm wide.
For rapid determination of heat sealability of flexible packaging. Produces 3 or 5 independently temperature controlled seals, up to 15mm wide x 30mm long.
For standard determination of heat sealability. Produces seals up to 50mm long x 5 to 25mm wide.