Single Component Systems Adhesive

Handling :
* Need to heat containers
* Heated delivery system and application rollers
* Moisturization at the nip

Precautions :
* Viscosity will build if the adhesiveis overheated
* Misting good tension control
* Corona treatment of some films
* Careful, immediate clean up of hot rollers
* possible loss of metallization

Polyether- and Polyester based Adhesives

This leads to a different polarity of the backbone. The Polyether-structure is unpolar, the polyesther-structure is polar. This has some basic consequences:
The polar Polyesther - structure adheres better to metal surfaces (aluminiumfoil and metallized films).
The unpolar Polyether-structure is more able to absorb slip additives. This means that there may be better bonds and a" slip drop"

Principle of Phase-Doppler Anemometry

The principle of phase-Doppler anemometry (PDA) relies on the Doppler difference method used for conventional laser-Dopler anemometry and was first introduced by Durst and Zare (1975). By using an extended receiving optical System with two or more photo detectors it is possible to measure simultaneously size and velocity of spherical particles. For obtaining the particle size the phase shift of the light scattered by reflection or refraction from the two intersecting laser beams is used.

Electronic Engraving

The advantages of Electronic engraving
* Use of whole offset tonal scale from 1 to 100 %
* Constant repetition
* Little ink used
* Quicker start-up on printing machines due to optimized cylinders physical chracteristics
* Nowadays technology allows to work directly from digital information received, to the Helioklischograph with an electronic managing system, by-passing photographic phases and obtaining better engraving quality

Application Structures in Flexible Packaging

* Liquid, Chemicals, Hot Filled Liquid, Retorted Meals, Pasteurized, Oily Products
PET/Ink/Adh/Nylon/Adh/LLDPE
PET/Ink/Adh/ALU-F/Adh/LLDPE
PET/Ink/Adh/MET-OPP/Adh/LLDPE
Nylon/Ink/Adh/LLDPE
PET/Ink/Adh/MET-OPP/Adh/LLDPE
* Dry Foods
PET/Ink/Adh/VMCPP
OPP/Ink/Adh/VMCPP
PET/Ink/Adh/ MET-PET/Adh/CPP

Lamination Problem

During the Laminating process normally we face with a lot kind of problem e.g.
* Bubbles in Lamination
* Low Bonds
* Tunneling
* Telescoping
* Haze in Laminations
* Poor Heat and Chemical Resistance
* Fish eyes

Printing Proof

To let the customer assess directly the quality level of the manufacturing process, together with the finished cylinder, also a complete printing proof should be delivered. To quarantee the final result maximum fidelity, the colour sample is the Cromalin proof approved by the customer. The colour sample on the printing proof are read with a spectrometer interfaced with a computer containing "formulation ink" software. Therefore it is possible to have automatically the formulation to mix colour recipe with a computer-aided mixing station that prints the colour recipe. This recipe is supplied to the customer attached to the cylinder's printing proof, so that in printing start-up a better speed in control and correct valuation and preparation of colours is made sure.

How the Helioklischograph works

The direct electronic engraving is a fully digitalized process. The 'engraving originals' are download from a directory (released) shared in line with the digital page-up department, where sigle images (digital files) are processed to obtain, with Step & Repeat, the final page-up with all the register marks(cross, autotron,slitting line,buttons,etc) following the customer's specifications. This is to obtain a complete digital printing(cromalin) for final control before engraving. In this part of the process a set of Job Tickets( files containing all the engraving parameters necessaryfor the Helioklischograph) will be coupled with the job single colours.
After the acquisition of the file, the machine will execute automatically a set of Test Cut, then (when the requested engraving parameters are obtained) will proceed directly with the definitive engraving of bthe images.