What a Release Liner on a Poly Mailer Is?

First, let's see a professional explanation for Release Liner on WikiPedia first.

A release liner or release paper is a paper or plastic-based film sheet (usually applied during the manufacturing process) used to prevent a sticky surface from prematurely adhering. It is coated on one or both sides with a release agent, which provides a release effect against any type of a sticky material such as an adhesive or a mastic. Release liners are available in different colors, with or without printing under the lows surface energy coating or on the backside of the liner. Release is separation of the liner from a sticky material; liner is the carrier for the release agent.(Quoted from Wikipedia)

It is on the flap(adhesive closure) of a mailing bag.

Generally, there are three different types of release liners, clear one, white one and anti-static metallic one.

Clear one is regular one we use for mailing satchels while white one and anti-static metallic one are special options. Thus, white one and anti-static metallice one are more expensive. Anti-static one is the most expensive of these three options.

Below is a picture showing you what a release liner is and different release liners' comparisons:

So, all of you must have a better understanding of release liners in courier satchels now.

Next time, when you need a quote from a supplier for courier flyers, don’t forget to let them know what kind of release liners you prefer to use.

Author's Remarks:
Hello, this is Patricia, the author of this article.

I have been in e-commerce and retail packaging industry for around 10 years. So I would like to share
what I know to you from a supplier's perspective.

Should you any questions or need this article in PDF file, pls donot hesitate to email us at hello@zkkpackaging.com.