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UV3531-34 Dual-cure Hardcoat for sale

UV3531-34 Dual-cure Hardcoat

  • Product Details

1. Characteristics

* Dual-cure process: semi-cured (thermosetting) by heat for further thermoforming processing; complete cure afterwards by UV will produce a coating layer with high abrasion resistance and hardness level on substrates such as PET, PC, PMMA sheet & film products.

2. Main composition and typical use

* UV3531-34 is a proprietary resin solution which pre-cures by heat and post-cures by UV. It is a blend of acrylic based polymer, monomer and thinner as coating sol, which cures by combination of heat and UV.

* anti-scratch and anti-abrasion protective hardcoating on PET, PC and PMMA sheet & film products.

3. Application Conditions

* Coating Process: applied by microgravure coating, slot die coating, flow coating or dip coating etc. RH below 60%; working temp. @ 20±2℃; cleanliness @ class 1000.

*Coating roller has to be free of dust or any other contaminants (cleanliness @ class 100); use the dust-removing roller before performing the coating job.

* Hardcoating sol preheating: up the sol temp. to 50-60 for lower viscosity and better leveling.  

* Coating Line Speed @ 6-plus m/min for optimal coating leveling.

* Curing: pre-curing by infrared flash-off @ 120 for at least 2 min; post-curing under UV afterwards so as to achieve optimal coating hardness level and abrasion resistance.

* Coating liquid should be continuously recycled through filter (use 2 micron pore size or under).

4. General Properties

Coating Sol

Method

Value

Physical Appearance

Visual

Yellowish Clear Liquid

Viscosity

Rotational Viscometer

20-30cps

Solids Level

180℃*30 min

34±2%

Thinner

-

BAc, PM, IPA (MEK)

GTT

-

60-75

Functionality

-

150 (theoretical value)

Substrates Applicable

PC, PET, PMMA, PVC, etc.

Pre-curing by Heat (Semi-curing)

70-80℃*5 min or 120℃*2 min

Post-curing by UV (full curing)

UV radiation dose: 800-1000 mj/cm2

 

Cured Coating

Method

Value

Elongation

JISK 5600

150% after baking

Pencil Hardness

750g load (after UV curing)

PC≥1H; PET≥2H

Adhesion

Crosshatch

5B

Chemical Resistance

MEK, 500g, 50 times/min

≥500 times

Steel wool Test

0000#steel wool, 1000g load

No damage (40 cycles)

Taber Abrasion

ASTM D 1044

250g load on each wheel

60r/min @ 100 cycles

Negligible Haze

Weatherability

JISK 5600

OK

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