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This method of sealing is principally used with polythene film in either bag, tubing or sheet form.
Co-extruded and most plastic laminated materials can also be sealed by this process.
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Should you have any concern to the suitability of a particular film:
CONSULT ASTRAPAC
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Astrapac offers a comprehensive range of standard and special purpose machines to suit
a wide variety of applications, ranging from manually operated models to semi automatic
high volume versions.
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Impulse sealers produced the seal by passing a low voltage through a resistance wire
(heating element) whilst the film is held under pressure.
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An electronic timer regulates the amount of heat passed into the film.
A secondary cooling cycle (fitted to many of our models) provides a suitable time
period necessary to ensure solidification of the seal.
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The sketch shows a typical sealing jaw assembly taken from an Astrapac impulse sealer.
The heating element is held under spring tension to allow for heat expansion and is separated from the film by a high temperature protective tape.
All Astrapac Impulse sealers are silent in operation and only draw power during the sealing cycle.
Individual models dictate if heaters are fitted to one or both of the sealing jaws relevant
to the application. For twin seal models consult Astrapac.
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These machines are found in all types of industry e.g. Manufacturing, food processing, warehousing, aggregate, engineering, medical, retail shops, etc.
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All standard Astrapac Impulse sealing machines are manufactured in hard wearing powder coat finish, colour white. Stainless steel versions available on certain models.
For non-standard models/hazardous area units, IP54/65 or custom made machines refer to our special purpose pages, or:
CONTACT US.
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