APOLAN screen printing squeegees are made from the toughest polyurethane formulation; very abrasion resistant and solvent resistant. Listed below are some tips to help to provide longest possible performance life.
Before any sharpening is to take place, the squeegee material may require 12-48 hours to allow any solvents to evaporate. This depends on the aggressiveness of the inks and solvents used.
Following these helpful hints will result in extending the printing life of our already long lasting APOLAN squeegee.
APOLAN - Screen Printing Squeegees Recommended Storage
TESTING OF SQUEEGEES
APOLAN - Polyurethane Screen Printing Squeegees were developed and improved over many years in actual printing environment, utilizing the most important principles of polymer chemistry. IT IS IMPORTANT TO COMPARE PRODUCT FROM DIFFERENT MANUFACTURERS ON ACTUAL PRINTING PRESSES, NOT IN A GLASS JAR.
The three major requirements, abrasion resistance, solvent resistance, and flex fatigue place contradicting requirements on the polymermatrix. It is easy to formulate a squeegee for extreme low solvent-swell by increasing the crosslink in the polymer backbone. This will fail on the press due to a rapid, severe loss of mechanical properties under solvent attack, EVEN THOUGH THE VOLUME SWELL IS LOW! Abrasion resistance and good flex-fatigue demand a low crosslink; therefore some swell has to be tolerated.
Ultimately, the best polymer-back bone is achieved by controlled low crosslink and very high-linear-molecular-weight polymer in order to reduce swelling. While this is well-known in the better literature and has been subject of many discussions with polymer chemists of Bayer, Dupont, etc., the problem is to translate this concept into practice. Every squeegee made has to undergo the chemical reaction to cure to a polyurethane.
To achieve the above requires manufacturing technology, manufacturing discipline and strict machine processing. It is here where APOLAN excels, resulting in a worldwide reputation for superior quality and consistency. THE PROOF IS IN PRINTING RESULTS USING MULTIPLE SAMPLES TO CONFIRM CONSISTENCY.