Our entire range of stand up pouches, whether they’re plain stock bags or custom printed pouches are manufactured using multiple layers of barrier film which are laminated together.  The layers serve two purposes: providing a barrier against external elements such as air and moisture to keep the contents fresh for longer; and to make the pouch strong and puncture-resistant.

We do not deal in cheap produce bags and trash bags that are generally seen at stores.  We use film that’s has a minimum thickness of 4.5 to 5 mil and needs to be sealed.  What users see is actually the innermost layer of the pouch.  Polyethylene is used for manufacturing this inner layer because it heats and melts quickly.  The open end of the pouch needs to be positioned between the jaws or clamps for sealing.  These clamps are hot and the plastic melts when they are closed.  

Heat sealing can be a tricky concept. The right temperature is not very easy to find. There’s a fine line between too cold (not hot enough to seal) and too hot (hot enough to melt the plastic instead of sealing it).  The right temperature depends on the thickness of the material being used. So if you have requested extra thick pouches to store a special kind of product, we need to determine the right sealing temperature for it.

There are probably many kinds of advanced heat sealers which are automated and fast. But when speaking about our sealing process, we mention the process of clamps/jaws that we just discussed.  We recommend Sealer Sales products.  They really know their business and have a large array of heat sealers. We do not gain anything from endorsing them, but the fact remains that they’re very good.

Regarding filling up standup pouches, this is done via the top or open end.  Remember, stand up pouches are made by sealing together multiple film layers. To make them stand, bottom gussets are created by sealing the bottoms completely. They should be strong enough to stand erect on the store shelf.

Our flexible pouches allow some of our customers to only use an auger dispenser. Their product is loaded into the auger. Then they manually hold the standup pouch for dispensing a certain amount. Other customers actually use their hands to fill the pouches with their products. They open the pouch, put their product into it, then weigh it and finally seal it.