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How Does A Roll Laminator Work?

January 31 2010, 10:13 PM

The most widely used roll laminators are thermal laminators that utilize two rolls of laminating film (clear plastic base with adhesive on one side) to encapsulate a document. The laminator is heated to a temperature that will melt the adhesive; then the rollers are turned on. The rolls of laminating film (adhesive side out) pass over heated elements called heat shoes and come together at a point called the nip, where documents are fed into the laminator. A second set of rollers pulls the laminated product out the back of the laminator.

 

Which Laminating Film is Right for a Thermal Roll Laminator?

 

     

  • Laminating films have numerous characteristics to consider in determining which film is the right choice. Film construction, size, gauge, finish, and core size all need to be considered with a specific laminator and application in mind. For example, if you are planning to laminate laser-printed copy paper for sheet protection, and you have a 27″ school laminator, then you would use a clear polyester-based 1.5 mil film 27″ x 500′ on 1″ core.

     

  • Film construction will always have two components: the plastic and the adhesive. The most commonly used film base is polyester, which produces a high quality, clear laminate with the highest rigidity. Polypropylene is a clear, softer base, and is mainly used for one-side lamination (book covers, for example). The adhesive component of film may be a low density resin which melts at a high temperature and generally produces the most economical product. Also available are premium grade co-polymers, which require a lower temperature for bonding, and blended co-polymer adhesives, which have the lowest melt temperature. Lower melt films are important for documents that are more sensitive to high temperatures, and for the best adhesion to inks with a high moisture content.

     

  • Film size (width and length) will be determined by the type of hot laminator you are using and by the dimensions of the product you are laminating. In general, you can use film narrower than the size of your laminator but no wider. (For example, you can use 25″ film on a 27″ laminator, but nothing wider than 27″.) The length of a roll is constrained by the diameter of the roll, which must not be too big to fit on your laminator. Film gauge and type of laminator are the primary determinants of roll length.

     

  • Film gauge is the thickness of the film, measured in mils (1/1000th of an inch). Film gauge is commonly expressed as the ratio of polyester to adhesive. For example, 3/2 film has 3 mils of polyester and 2 mils of adhesive and a total thickness of 5 mils. The higher the ratio of polyester, the more rigid the laminated product will be. If you laminate two identical pieces of a product using 3/2 film on one piece and 2/3 film on the other, both laminated products will be 5 mils thick. However, the product laminated with 3/2 film will be more rigid.

     

  • Film finish is one of the most important laminate attributes for commercial applications. While the widest application is for an economical clear (glossy) finish, films are also available with matte, satin, and crystal or textured finishes. Factors such as glare reduction, scratch resistance, and visual appeal are all important in print finishing, signmaking, and diplay production.
  • Roll core size is the last variable in film selection. This is determined by your laminator’s mandrel size, which can be found in the laminator’s specifications. In general, most school and light commercial laminators use film with a 1″ core. Older models and a few of the mid-size laminators may use 2-1/4″ core. Most of the industrial laminators use film with a 3″ core.

 

Laminating Film Temperatures

 

     

  • Film Adhesive Type : High-Temperature Polyethylene (PE)
    For 1.5 mil – 1.8 mil film thickness, temperature range is 310 (F) – 320 (F)
    For 3.0 mil film thickness, temperature range is 280 (F) – 290 (F)
    For 5.0 mil – 10.0 mil film thickness, temperature range is 270 (F) – 280 (F)

     

  • Film Adhesive Type : Low-Temperature PE Co-polymers (PE)
    For 1.5 mil – 1.8 mil film thickness, temperature range is 290 (F) – 310 (F)
    For 3.0 mil film thickness, temperature range is 220 (F) – 270 (F)
    For 5.0 mil – 10.0 mil film thickness, temperature range is 220 (F) – 260 (F)

     

  • Film Adhesive Type : Ultra Low-Temperature Special PE Co-polymers
    For 1.5 mil – 1.8 mil film thickness, temperature range is 230 (F) – 280 (F)
    For 3.0 mil film thickness, temperature range is 180 (F) – 260 (F)
    For 5.0 mil – 10.0 mil film thickness, temperature range is 180 (F) – 250 (F)

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Banner American EasyLam II Hot Laminator

January 19 2010, 3:43 AM

the banner american easylam ii 27 hot laminator includes the new features hot laminator users have been requesting. it can use either 1.5 or 3 mil laminating film. the easylam ii also comes with an optional switch for the use of 5 mil laminating film.

other features on the banner american easy-lam ii hot laminator include:

molded side housing made from heavy-duty composite material that directly holds the rollers, heaters, mandrels, etc. this eliminates the need for support brackets and reduces assembly time, which saves you money.

new silicone laminating rollers last longer.

new heavy-duty dc motor.

an easy-to-use tension adjustment knob for both the top and bottom mandrels.

see through safety shield.

built-in thermometer.

optional features include: footage counter to measure film usage. keyswitch to prevent unauthorized use. footswitch to allow postioning of items before starting. 5 mil switch to slow motor down for 5 mil lamination. if the banner american easylam ii sounds like the laminating machine you need, please give us a call. we ll be happy to answer any questions you have and send additional information about this hot film laminating machine.

the easylam ii is excellent for businesses, schools, government agencies, nonprofits and any organization that needs large format, high quality laminating capabilities.

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wide format laminating machine,roll laminator Buye

May 31 2009, 2:17 AM

 

Cold & hot laminators are the first choice of after printing and also perfect equipment for all kinds of post production of inkjet printing, including rolling materials and board materials.

The cold & hot laminators can be used in lamination or mounting of printed matter, important document, books cover, photographic, color pages, documents, charts, drawings, indoor advertising products, wedding dress photograph, and etc, adding a protective layer on these materials, making image brighter and keeping it for longer time .

They are available for AD. shop, photographic and copy shop, inkjet printing industry, exhibit industry to do lamination work.

Generally speaking, cold laminator uses glue and mechanical press to laminate the laminating film onto the picture, the hot laminator use high temperature and press to laminate. In comparison, cold laminator with low cost, but hot laminator’s laminating effect is better than cold laminators, and the picture preservation time is longer

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