기술사양

테스트방법

Test Item	Test Methods
Erichsen	Cross cutting by 5mm interval and then pushing by 6mm in depth with Erichsen tester
Impact	Drop 500g & 1/2 inch diameter steel ball(Dupont Type) from a height of 500mm
Bending	180。 1T Bending at 20℃(CR, EGI, GI)
Pencil Hardness	Check the trace mark when draw a line with Mitsubishi UNI pencil @ 45O direction & 500g pressure
Salt spray(Flat surface)	Spray with 5% salt water with 35℃
Salt spray(Cross cutting)	Cross cutting with razor blade till it slightly touches on substrate metal and then test as same as above
Resistance to Alkali	20±5℃× 5% NaOH × 24 Hrs
Resistance to Acid	20±5℃× 5% HCl × 24 Hrs
Boiling water	98℃ water × 1Hrs and leave it for 1hr
Pollution resistance	Leave coffee, olive oil for 24Hrs, and then erase with methyl alcohol

*Test with is to be done through sealing deges with hot melt resin.

테스트결과

Test Item	PET/PVC Laminated Steel	PET Laminated Steel
Erichsen	No Peeling	No Peeling
Impact	No Peeling & Crack	No Peeling & Crack
Bending	No Peeling & Crack	No Peeling & Crack
Pencil Hardness	Over B grade	Over HB grade
Salt spray (Flat surface)	No change of surface CR:240Hrs EGI:360Hrs GI:360Hrs	No change of surface CR:240Hrs EGI:360Hrs GI:360Hrs
Salt spray (Cross cutting) (1 Cycle=8Hrs Spray + 16Hrs Pause) (10 Cycle => 240Hrs)	Rust& decoloration spread within 4mm from the cross cutting Edge CR:90Hrs EGI:240Hrs GI:240Hrs	Rust& decoloration spread within 4mm from the cross cutting Edge CR:90Hrs EGI:240Hrs GI:240Hrs
Resistance to Alkali	No change of Color&surface	No change of Color&surface
Resistance to Acid	No change of Color&surface	No change of Color&surface
Boilling water	No peeling, Crack&Blister	No peeling, Crack&Blister
Pollution resistance	No change of surface	No change of surface

Test Item	PVC Laminated Steel	PVF Laminated Steel
Erichsen	No Peeling	No Peeling
Impact	No Peeling & Crack	No Peeling & Crack
Bending	No Peeling & Crack	No Peeling & Crack
Pencil Hardness	Over B grade	Over HB grade
Salt spray (Flat surface)	No change of surface CR:240Hrs EGI:360Hrs GI:360Hrs	No change of surface GI:1000Hrs Rust& decoloration
Salt spray (Cross cutting) (1 Cycle=8Hrs Spray + 16Hrs Pause) (10 Cycle => 240Hrs)	Rust& decoloration spread within 4mm from the cross cutting Edge CR:90Hrs EGI:240Hrs GI:240Hrs	sprea within 4mm from the cross cutting Edge GI:360Hrs
Resistance to Alkali	No change of Color&surface	No change of Color&surface
Resistance to Acid	No change of Color&surface	No change of Color&surface
Boilling water	No peeling, Crack&Blister	No peeling, Crack&Blister
Pollution resistance	No change of surface	No change of surface

Test Item	PP Laminated Steel	Related Standard
Erichsen	No Peeling	KS B 0812 KS M 3343
Impact	No Peeling & Crack	KS D 3520
Bending	No Peeling & Crack	KS D 3520 KS M 3343
Pencil Hardness	Over HB grade	KS D 3520
Salt spray (Flat surface)	No change of surface CR:240Hrs EGI:360Hrs GI:360Hrs	KS D 9502
Salt spray (Cross cutting) (1 Cycle=8Hrs Spray + 16Hrs Pause) (10 Cycle => 240Hrs)	Rust& decoloration spread within 4mm from the cross cutting Edge CR:90Hrs EGI:240Hrs GI:240Hrs	KS D 9502
Resistance to Alkali	No change of Color&surface	JS M 3343 JIS K 6744
Resistance to Acid	No change of Color&surface	JS M 3343 JIS K 6744
Boilling water	No peeling, Crack&Blister	JS M 3343 JIS K 6744
Pollution resistance	No change of surface