9075D 2 Components Polyurethane Laminating Adhesive （For General Lamination)

PU-9075D is often used lamination for dry food package film such as BOPP,CPP,PET,NY,LDPE.

Properties:

1.Good coating ability,basically no white dot and bubble.

2.When laminating aluminum coated film,please do test first,avoid aluminum layer transfer.

3.It not fits boiling packaging film.

Parameters:

Safety

SGS test: this product is not containing plasticizer.

Usage guides:

1、 in solvent, the water content should be less than 700ppm 、the alcohol content should be less than 500ppm. When solvent quantity is uncertain or the air humidity is high（above 80%）, this product should be tested to make sure the hardener proportion within 20KG︰4KG~5KG.

2、dilution：

At first, weigh out the ethyl acetate according to working concentration. Then put the ethyl acetate into main agent, and then stir steadily and fully. They are better to be mixed in drums to make sure mix ratio accuracy. When counting working concentration, solution viscosity should be considered, because viscosity could effect coating situation. The working concentration and viscosity as below:

1. coating amount：

here is formula from experience for bumian coating roller and laser coating roller：

Dry base coating amount (g/m²) = 0.2 × working concentration% × hole deepness μ

Electric carving roller and pyramid type embossing roller are not suitable for the formula.

4、Coating amount (dry base) can be between 2.5~3.5 g/m². For full area light color printing, coating amount should be bigger, but too much coating increases risk of aluminum layer transfer.

5、Drying：

To make sure solvent remains figure, drying efficiency is very important. Drying efficiency is depend on hot wind temperature、wind speed and wind volume. 

Higher speed lamination requires higher drying efficiency. On the contrary, when drying efficiency is low, laminating speed should be lowered. Hot wind temperature should be increased by three steps for complete evaporation. For example, if wind speed is 30m/s, laminating speed is 80m, the wind temperature could be set 50-60℃、60-70℃、70-80℃ three sections.

6、pressure：It is recommended to raise the pressure and temperature as possible, but do it without damaging the film. The laminating rollers temperature shall be choose from 50-80℃ . Note：Cylinder temperature not means hot roller’s temperature, the temperature at the edge of hot roller not means the temperature at roller-film contact point. The laminating roller press also effects lamination strength. The press is depend on cylinder diameter、air pressure、silicon roller’s hardness and length. What can be often adjusted is air pressure. The hot roller pressure can not be read from pressure meter on lamination machine.

7、curing：The laminated films should be sent to curing room as soon as possible. At 45-55℃, the unhardened glue will melt and flow flat, which removes bubble and white dot. 24 hours curing can make good bonding strength. Should higher bonding strength required, the curing time could be extended. The air circulation in curing room should be good to make sure the temperature is at same level. Constantly replacing high solvent content air can decrease solvent remains.

Notification:

1、Composite base material must be surface treated. For BOPP、CPP、PE, the surface tension should be above 38 dyne. For BOPET、BOPA, the surface tension should be above 50 dyne.；If BOPET、BOPA is not double surface treated, double surface lamination is not recommended principally because peeling strength can’t be guaranteed.  

2、film addictives has effects to viscosity. Especially slipper OL and ER should be strictly controlled, test is recommended before using.

3、the adhesive glue is better be used within a day. If there is too much rest, it can be diluted with solvent and keep in dry dark place closed, taken as solvent to put in new glue by times when next day working. If there is unclearness or excessive viscosity, it can not be used.

4、This product is easily wetted, should be stored in dry dark place. Storage time is one year.

5、This product is hazardous chemical category Four, petroleum first (dangerous class 2). Please pay attention when using.