Emseal Pty Ltd

Laminating Machinery and Supplies Worldwide

This section contains definitions for most of the terms used on this site. Click on the term you wish to know more about to see further information:

EPDM rubber
Heat assisted laminating
Interactive roller guard
Pressure sensitive film
Rewind / backing paper rewind
Silicone Rubber
Thermal laminating
Encapsulation refers to the process of coating both sides of an item, such as a poster, with a layer of plastic to protect the item from damage due to handling, moisture, weather etc. This process is most commonly used with thermal laminators, but can also be used with some pressure sensitive machines.

EPDM or Ethylene Propylene Diamine Monomer is a high density rubber, capable of being ground to a very smooth, even finish. It also has a high durability and resistance to tearing, solvents and high temperatures which makes it easy to clean, and perfect for laminator rollers. EPDM rollers are available in hard and flow form styles.

Heat Assisted Laminating
Heat assisted laminating is the use of low levels of heat to soften the adhesive on a pressure sensitive film. Some films require this, and this may also be necessary in cold climates where the adhesives become less `sticky'.

Roller Guard
A roller guard covers the front rollers of a laminator, and is wired to make the machine stop when the guard is removed.

Mandrels are the bars onto which rolls of film are loaded. They include a tensioning brake which allows accurate adjustment of back pressure to film, and mandrel adaptors. Mandrel adaptors allow film with various core sizes to be loaded onto the same mandrel, by simply exchanging the adapters, available for 58mm (2.25") and 75mm (3") cores.

Pressure Sensitive Films
There are a large variety of pressure sensitive films on the market, different thicknesses, different grades of material and different adhesive types, but they mostly work on the same basic principle. A layer of plastic, frequently a vinyl, is coated with an adhesive substance, which in turn is covered with a layer of silicone backed release paper. When being used, this release paper is stripped from the film, exposing the adhesive, and is pressed firmly against the item being laminated by rollers.
It is possible to purchase films with UV protection, anti graffiti properties, patterns, colours and many other properties.

Backing Paper Rewind
The backing paper rewind strips the silicone backed release paper from the pressure sensitive film as it enters the machine. The release paper is then either disposed of or used as an underlay. Upper and lower rewinds enable the machine to perform total encapsulation of an item in a single pass on a pressure sensitive laminator.
The rewind can also be used to wind up items being laminated, preventing them from falling to the floor during lamination, and resulting in laminated items being tightly wound onto a core, ready for trimming.

Silicone Rubber
Silicone rubber is believed by many in the print and lamination industries to be the best grade of rubber for laminator rollers. It is considerably more expensive than EPDM due to high material and machining costs. Silicone rubber is also more susceptible to damage from solvents such as kerosone, as well as tearing or splitting. Silicone rollers are an option on most EMSEAL laminators.

Thermal Laminating
Thermal laminating film is a thin layer of plastic (normally polyester) which is coated in a thin layer of heat activated adhesive. Upon heating, this adhesive becomes extremely sticky, and will adhere strongly to most items.

Thermal films may not stick to some surfaces, particularly images created with silicone based inks, waxes or using certain grades of print medium. For these items, special films or pressure sensitive films are the best option. Thermal laminating films are generally much cheaper than pressure sensitive films, and are almost always used for full encapsulation of an item.

An Underlay is used when laminating single sided items on a pressure sensitive laminator. It consists of any grade of material, such as rolls of newsprint or used backing paper from Pressure sensitive adhesives, and is simply fed through the machine below the item being laminated to prevent adhesive from sticking to the rollers.


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Emseal Pty Ltd.

Machine Sales, Film Sales, Repairs:
7 Elsum Ave, Bayswater North, Vic, 3153 AUSTRALIA
Phone: (+61-3) 9720 5477
Fax: (+61-3) 9720 5977

Email : sales@emseal.com.au