Perforations are minor details on everyday products that most consumers don't even notice. Perforations are the small holes or rows of holes that are punched into paper goods make the paper easier to tear and bend.
Without perforations, paper goods would be difficult to use and store.
Manufacturers use specialized machines fitted with perforation blades to produce perforated paper goods. There are three types of perforation blades that manufacturers can choose from. The type of blade that works best will depend on the intended use of the paper goods after production.
1. Straight Perforation Blades
Straight perforation blades feature a linear design and a beveled edge. These design elements allow straight blades to withstand repeated use in a manufacturing setting.
Manufacturers can choose from straight blades made out of a wide range of materials. Some of the common materials used to produce straight perforation blades include high carbon, stainless steel, solid carbide, and ceramics.
Blade material choice is determined by the specific cutting action of the blades. Different blade compositions work best with different paper materials to prevent degradation and blade damage during production.
2. Cutoff Perforation Blades
Cutoff perforation blades feature a custom cutting edge with teeth. The configuration and geometry of these teeth play a critical role in determining how well the blade processes certain paper goods.
Tooth profile is one of the most important geometric elements in a cutoff perforation blade.
Manufacturers can choose from blades equipped with a scalloped tooth profile, a peg tooth profile, or a slant tooth profile. V-shaped teeth of varying depths are also found on cutoff perforation blades.
The distance between teeth and the shape of each tooth will determine the perforation pattern that is achieved when processing paper goods.
3. Circular Perforation Blades
Circular perforation blades are also referred to as rotary blades by manufacturers. These blades rotate continually when a perforation machine is in operation. Circular blades can feature a number of different edge patterns.
A smooth edge will simply slice through paper goods completely. Manufacturers who only want to perforate a paper material will need to select circular blades that have a specialized edge geometry.
Just as with cutoff blades, the spacing and shape of the teeth around the edge of a circular blade will determine the perforation pattern made when processing paper products.
A thorough understanding of the types of perforating blades allows you to better appreciate the complex process used to perforate paper towels and toilet paper.
For more information about tissue perforation blades or other perforation blades, contact a company like Kopess Manufacturing Inc.