Perforated material should be easy to tear, but it should also hold up until you need to tear it. Consider perforated notebook paper. You want the paper to tear with minimal effort, but not so easily that the paper falls out of the notebook.
A perforated edge consists of a series of cuts and ties (the areas between cuts). The ratio of cuts to ties determines perforation strength. When there's a lot of space between cuts, a material requires more force to tear. Longer cuts with short ties between result in material that’s easier to tear.
Industrial perforation blades are designed with a specific tooth-to-gap ratio depending on the desired size of cuts and ties. Blades with more teeth per inch (TPI) make small cuts and ties that are easy to tear, such as with paper towels or notebook paper. TPI also influences how easily a material will flow through your machine.
It’s important to choose a blade with the right TPI for your materials. Incorrect tooth-to-gap ratios can make materials tear prematurely or perform inconsistently. Torn material could also get stuck in your machine, causing a costly breakdown. High-speed converting lines must balance tear strength with efficient material flow.
Excessive friction and heat can cause your blades to dull prematurely and impact operations. Blades with more teeth make smoother cuts but generate more heat.
Choose a blade with customized edge angles and bevels to reduce the force required to perforate your materials. Sharper blades reduce the friction needed to make a clean cut, but they are more prone to chipping and breakage.
Custom perforation blades let you control the blade geometry to exacting specifications. You can get a blade sharp enough to cut through plastics and other abrasive materials cleanly without chipping.
Perforating blades that make clean cuts also generate less dust, which enhances operational efficiency. Perforation waste can contaminate your material if it falls into a package before it’s sealed. When you’re working with sticky materials, such as self-adhesive labels, some of the material can also stick to your blade.
A blade’s metallurgy impacts its durability. The right alloys allow for a steeper edge angle while limiting the risk of breakage. Common materials for perforation blades include:
Choosing the optimal alloy for your application is critical. For instance, using a D2 perforation blade in a high-heat, high-speed manufacturing environment could lead to warped blades or the need for excessive resharpening.
Materials react differently to cutting force, friction, and heat. A thin plastic laminate will feed through your machine or cut differently than a hard acrylic sheet. Before sending custom specs for your equipment, understand which configurations work best, whether you need perforating blades for packaging supplies or other applications.
Cut through plastic film and other soft materials with packaging machine blades that have small teeth and a high TPI. This will keep the blade from pulling or snagging the material as you make a cut.
Heavy laminates are more abrasive and wear blades out faster. Choose a rotary perforator blade with a lower TPI to keep the edges from chipping on the material. M2 and tungsten carbide blades work well with these materials because they generate a lot of friction, so the blades need to withstand abrasives.
When working with multi-layer packaging, use a blade with medium TPI to keep the sheets together during production.
Whether you’re using rotary perforator blades or straight blades, you need to match blade thickness, tooth profile, and clearances to your machine’s OEM specifications. Straying too far from recommended measurements affects your machine's calibration.
This can cause your blades to drift or shift. Your machine won’t cut consistently, and your team will have to adjust pressure, gaps, and other settings to improve product quality. Using blades that are too far from OEM specifics can also make a machine vibrate.
Hyde has 150 years of experience crafting custom industrial blades that match OEM specifications, with the reliability of US-based manufacturing capabilities.
Matching blades to your converting technology capabilities and requirements can cut down on production interruptions, but they still happen. Watch for these common issues:
Make your production line more efficient with custom perforation blades from Hyde. Our US-based operations cut our turnaround times to three to four weeks. Contact our team today to get a custom quote or learn more about our converting industry solutions.