Why can Polyethylene or Polypropylene bags hold vacuum for long term storage?
These materials are both porous, and allow oxygen and moisture to slowly re-enter the bag. • Do all Accu-Seal Heat Sealers require an external air supply? No. Our model 540, carries an internal compressor! Also our model 20 is a manual sealer. Further, if you do not have a compressor it is possible to purchase one through Accu-Seal. • Do you calibrate Heat Sealing machines? Accu-Seal can arrange for the Initial calibration and Annual calibration of Medical Heat Sealing machine models: 8000, 830, 730, 630, 530/540, 635, 630CH. Accu-Seal uses an independent metrology company that is ISO certified for all calibrations. • How would I know the appropriate heat and cool times to set my Accu-Seal Heat Sealer for the best quality seals? To help ensure the best quality seals, Accu-Seal requests that you send sample pouch or bag materials so that we can provide the heat seal settings for you. Most manufacturers will provide temperatures for sealing each film, this will provide a good starting po
