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You don't have to rely on a "one -size fits all" mentality when working with poly bags.
A huge benefit of working with poly resin is that it can be custom manufactured to fit almost any application. You don't have to rely on a "one -size fits all" mentality with this packaging - instead you can evaluate the places in your workflow that are causing delays, maybe isn't holding up like it should, and possibly just flat out doesn't seem to be working. Listed below are just a few options you have to consider in your question for the best fit packaging.
Common poly bag additives
  • Poly Bags with EVA

Have you everwondered how plastic bags can withstand extreme temperature changes? Plastic bags used in freezer applications are generally made with poly bag additives called EVA, or ethyl-vinyl acetate, a 2-3% additive that increases the strength of the poly bag. The EVA additive helps to prevent the poly film from cracking.

  • Anti-Block Additive
Another type of poly bag additive available is an anti-block. An anti-block additive cures flaws found in film(often referred to as "dots,") and unnecessary adhesion between two layers of film (also known as the blocking effect). Anti-block poly bag additives give the plastic sheeting a roughness, that decreases blocking and flaws in the film.
  • Non-Scratch Poly Bags
If you're looking for a plastic bag with a non-scratch additive, what you're essentially receiving is a plastic bag that is made with very little of the anti-block additive mentioned above. One thing to note with a non-scratch additive - the anti-block additive makes the inside of the poly bag slippery, so it is easy to open. A poly bag made with a non-scratch additive conversely, will be more difficult to open.
  • Slip Characteristic
Poly bags with a slip additive works by increasing the amount of slip, or "glide," of the poly bag. The amount of slip increases the ease of handling of the plastic bag or film, and helps to prevent the film layersfrom sticking to each other. A poly bag labeled as a "high slip poly bag" is manufactured with extra slip additive, which increases the amount of glide of the poly bag. Conversely, if you're looking at low slip poly bags, the low slip additive will inhibit movement and promote grip.
Additional Types of Poly Bags You Should Be Famiiar With
  • Standard Low Density Poly Bags
You may not be familiar with the term low density polyethylene, or LDPE, but it is actually one of the most commonly used resins in the poly market. It is used for your general poly bags, poly tubing, pallet covers, and plastic films. Low density film has excellent clarity and strength, and provides excellent protection.
  • Plastic Bag Resin Clarity
The clarity of a poly bag is the degree that you are able to see through the film (or the transparency of the poly film). Poly resins can be manufactured to match a profile, so thatprofilewill predict its extrusion performance across a range of applications.
  • Linear Low Density Poly Bags
Another term that you may have questions about are linear low densitypolyethylenefilms, otherwise known as LLDPE film. LLDPE films, and lldpe poly bags, are known for their strength and puncture resistance, more so than their clarity. Linear low densitypolyethylenebags are more stretchable and lighter, making them an ideal packing solution for food products. Not to worry; LLDPE bags meet FDA standards.
  • Transparent Plastic Bags and Poly Films
Transparent poly bags are those that regardless if they are colored poly bags or clear poly bags, they can be seen through. Light can pass through the film, allowing your customer to still see the product within the bag. Transparent bags are often used in the food industry, and manufacturing operations where the consumer would be interested in seeing the product before they purchase it.
  • Opaque Poly Bags and Poly Films
Opaque poly bags cannot be seen through, but light can still pass through the plastic film. You findopaque colored poly bags used in applications where customers do not necessarily need to see the product, but like the additional protection that the opaque quality presents. An example of the an opaque poly bag to consider isa black conductive poly bag. Black conductive poly bags are made so that they block electronic shock from electronics.
Have additional questions for us or an application you'd like to discuss in further detail? Give us a call at 888.335.5598 or contact contact our Sales is a leading provider of poly packaging supplies, poly bag supplies, bagging equipment, packaging equipment and packaging solutions.

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