How Poly Bags Are Made
Manufacturing Custom Poly Bags
Here at A-Pac manufacturing, we use a blown-film extrusion process to manufacture the plastic that makes poly bags. Once the plastic is formed and wound on a roll, our poly bag manufacturing machines seal and cut bags according to each client’s custom poly bag specifications. Here’s a closer look at how poly bags are made.
The Blown-Film Extrusion Process
The first step of making poly bags is the blown-film extrusion process. The following occurs when using this process:
- Small plastic pellets (called resin) are first melted down under controlled conditions, until they become molten and pliable.
- Once resin pellets reach the desired level of pliability, they are then pressed (extruded) through a circular die gap to form a continuous tube of plastic. In this molten state, the tube of plastic is pinched off at one end, and then inflated and stretched to the size and thickness of the desired finished product.
- The inflated bubble of plastic is drawn vertically up a tower so that it has a chance to cool before it is flattened out and wound onto a roll.
- Once the plastic is on a roll, it can be cut to form tubing, single-wound sheeting, or centerfold sheeting. Most often, we transform the plastic into poly bags.
Making Poly Bags from Plastic Rolls
After the blown-film extrusion process is complete, we take those rolls of plastic and transform them into poly bags by doing the following:
- Rolls of plastic tubing or sheeting are first fed through a machine that draws the material out to the proper length.
- The machine then places a seal on the material at the correct length and cuts it off to make an individual bag.
- This process is then repeated until we have the number of poly bags we need for an order.
How Many Poly Bags Can You Make in An Hour?
Like most manufacturing processes, it depends. We can make as many as 70,000 bags an hour, depending on the size of the poly bags we’re producing.
However, if we are manufacturing larger bags, we may only be able to produce 2,000 bags an hour.
Poly bag production speed does depend on the size and thickness of the bags you’re looking for, but in general, it’s a very fast process.
What's the Secret to Making Quality Poly Bags?
The secret to producing high-quality film for poly bags is having great equipment. The better a machine is able to maintain a consistent flow of material throughout the process, the more even and quality-controlled the final product.
Here at A-Pac Manufacturing, we employ modern poly bag manufacturing machines that use servo drive motors. This gives us optimal control and accuracy throughout the production process, which leads to the exceptional poly bag quality that makes a bag an A-Pac poly bag.
Your Trusted Poly Bag & Film Manufacturer
Not sure where to start? We're here to help!
There's a lot to consider when it comes to ordering poly bags, plastic liners, or rolls of film. The A-Pac team is here for you. Let us know what you're looking for, and we'll help you determine which poly bag and plastic product options are best for your application.
A-Pac Manufacturing is a trusted supplier of high-quality poly bag and plastic film products made in the USA.
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