Calendering Machine: Essential Facts You Need to Know

If you’re in the business of making paper products and aren’t familiar with calendering, you may be setting yourself up for failure. Calendering machines are a big part of everyday business operations for many companies, but there has been a lot of misinformation about this manufacturing process. So today we’re going to break down some facts about the calendering machine that can help get you on your way to success.

List of Crucial Facts of Calendering Machine

1. Originally, It Was Done By Hand

The term “calendar” refers to a device that consists of a complicated arrangement of pressure rollers and is used nearly entirely in the calendering process nowadays. However, this process was carried out manually into the 1700s.

During that period, textile manufacturers used workers to press and roll textiles by hand, and it is not a coincidence that these employees were named “calendars.”

2. On Average, 500 to 5,000 PSI are Employed

When materials are calendared, they are subjected to extremely high pressure, often ranging from 500 to 5,000 pounds per square inch (PSI). Less pressure is required to work with softer materials because they are not as strong as harder ones. Paper, for example, can be calendared at a pressure as low as 500 PSI, whereas plastic and rubber must be subjected to a higher pressure to compress properly.

When doing calendaring, businesses must apply sufficient pressure to the material to distort it. If this does not occur, the material will not be able to move through the calendar rollers.

3. It Can Produce Various Finishes
The process known as calendaring can be employed to give textiles a wide range of different finishes, examples of which include the following:

● Beetled — The beetled process, which is almost always carried out on cotton, results in a texture that is similar in appearance to satin.

● Watered — Watered, also called moire, is a finish in which some threads are rounded, and others are flattened.

● Embossed — Embossed is a form of finish defined by an engraved pattern or design and achieved using specialised rollers.

● Sheriner — The final type of surface treatment is called shreiner, which involves using hard rollers to produce a ribbed pattern.

4. There Exist Super Calendars

The process of calendering is normally carried out with a single calendar, while other businesses use a collection of calendars stacked one on top of the other. It is sometimes referred to as a super calendar and features rollers made of a malleable material such as cast iron. The use of soft rollers in super calendars makes it possible to achieve a smooth finish on paper-based textiles and materials. This is the calendar’s primary function.

Final Thoughts

We can see a growing utilisation of calendar machines in the modern industry due to the widespread usage of these machines in finishing textile materials. The calendering process significantly contributes to the finished cloth’s overall quality. Fabrics can only be sold on the market if this step is completed since, if it is done, the fabric will retain its charm. Because of this, it is essential to have a solid understanding of the calendering machine.