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Quality defect & treating methods of dry lamination products

Categories: Industry NewsRelease time: 2013-05-15 15:32:00 RSS subscription Font size:【 Large Middle Small

Hickie

   

lPhenomenon:

There are many scattered spots on the surface of lamination film,especially on the metallized products or light ink printed products.It appears dusky color when serious.

2Reasons and strategies 

1)Lack of coating—— Adding coating

2)Levelling property of cementing compound is poor.——Using better levelling property cementing compound,which contains high solid and low viscosity.

3)The surface tension force of basic film is too small——redealing with basic film and improving the surface tension force.

4)Too much solvent residue——adjusting dull and dry workmanship

5) Changing the coating method is also a way to deal with hickie.

 

二、Bubble

1Phenomenon: It seems like hickie,while it is different from hickie.It is characterized by the separation between the two layers,also with the presentation of “ bubble”.

2Reasons and strategies:

1)Too much solvent residue——Adjusting dull and dry workmanship to ensure the qualified residue

2)Relative humidity in the air is too high——Choosing dehumidification method while keeping RH (60%)

 

三、Ruffle tunnel

1Phenomenon:There are unsmooth ruffle for lamination products.Two layer films isolating on the ruffle place will form of tunnel,which usually appears on the both ends.It will traverse when serious.

2Reasons and strategies: 

1)Tension force is out of control——Adjusting the toll tension of basic film.

2)The initial adhesion of cementing compound is too small——Choosing cementing compound of large initial adhesion

3)Rolling tension force is too small——Enlarging the rolling tension force.

4)Halfway drying ——Strengthen drying ability.

四、Indentation

Phenomenon:The lamination product was cured,there are some unsmooth small indentations,which is close to the hundreds of maters of centered part.It usually appears each one on each roll,but not the ruffle and tunnel.