Frequently asked questions about OPP flat bags with sealed seam

What is an OPP flat bag with a sealed seam?

An OPP flat bag is a crystal-clear bag made from biaxially oriented polypropylene with a back sealed seam. OPP is considerably clearer and stiffer than PE – the “crystal-clear” premium look in which the product is shown off brilliantly. Standard for greeting cards, textiles, pralines and presentation goods.

What is the difference between OPP and PE flat bags?

OPP is crystal-clear, crisp, stiff and brilliant – ideal for presentation. PE (polyethylene) is softer, slightly milky and more flexible – cheaper and more tear-resistant. For maximum clarity at the point of sale choose OPP; for robust protection and shipping choose PE flat bags.

Are OPP flat bags food-grade?

Yes, the food-grade variant to EU 10/2011 is approved for direct food contact – common for pralines, pastries, biscuits and confectionery. Declaration of compliance available on request.

Are there OPP bags with a self-adhesive flap?

Yes – many OPP flat bags have a resealable or permanently adhesive closure flap on the lip. This lets them be sealed cleanly and ready for sale without a heat sealer.

How clear are OPP flat bags really?

OPP is the clearest common bag film – almost crystal-clear, with no clouding. The colours and printed designs of the contents show through unaltered, which is why OPP dominates in retail and gift packaging.

What sizes are available?

From small card formats (e.g. C6/C5/A6) up to A4 and larger. For folded cards with an envelope there are precisely fitting formats with a little overhang. Tell us the product dimensions and we will name the right bag.

Can OPP flat bags be printed?

Yes – printing with a logo, design or mandatory information is possible as a bespoke production. On the crystal-clear film, printed designs look particularly high quality.

Are OPP flat bags available with no minimum order quantity?

Yes, common formats are available from stock with no minimum order value and with tiered pricing. Shipping from our German warehouse in 1–3 working days; printed variants on request.