Learn Flexible Packaging!
1st Layer – 12µ Pet Density 1.4
2nd Layer – 50µ LDPE/Poly (Natural) Density 0.93
How much 2nd Layer required for 250 kg Pet ?
2nd Layer gsm x printed Quantity ÷ 1st Layer gsm
(50 * 0.93 * 250) ÷ (12 * 1.4) = 691.96 kg
1st Layer Pet 12µ – 250 kg
2nd Layer Poly 50µ – 691.96
Final Laminated Material required 1000 kg
Job Structure 12µ Pet + 50µ LDPE
Pet Density 1.4
Poly Density 0.93
12µ Pet gsm = 12 x 1.4 = 16.8
50µ Poly gsm = 50 x 0.93 = 46.5
Composite gsm = Pet Film gsm + Poly gsm = 16.8 + 46.5 = 63.3
Pet required for 1000 kg Laminate = Pet Film gsm x Total Output ÷ Composite gsm
= 16.8 * 1000 ÷ 63.3 = 265.40 (kg)
LDPE required for 1000 kg Laminate = LD Film gsm x Total Output ÷ Composite gsm
= 46.5 * 1000 ÷ 63.3 = 734.60
Total Laminate (Pet + LDPE) = 265.40 + 734.60
RAW MATERIAL CALCULATION FOR 3 PLY POUCH JOB (CYLINDER, FILM, INK & ADHESIVE)
How to calculate NCO & OH required in kg?
Someone asked me if they have Adhesive ratio of 100:55 (Dow 2 component Adhesive).
Adhesive total Quantity required 100 kg for a particular job.
It’s a Very simple and basic Calculation.
NCO : OH
100 : 55
NCO = FINAL QUANTITY X NCO RATIO ÷ ( NCO RATIO + OH RATIO)
100 X 100 ÷ (100+55) = 64.52 kg
OH = QUANTITY X OH RATIO ÷ (NCO RATIO + OH RATIO)
100 X 55 ÷ (100+55) = 35.48 kg
Convert Roll kg to Meter to Meter Square Flexible Packaging using Excel Sheet.
In any Flexible Packaging job, we have to convert Running Meter or Linear Meter to Square Meter (m²). In this video you can learn and use Excel Sheet to Convert Linear Meter of Film (BoPP, Pet, LDPE etc.) to Square Meter. First we convert roll kg to meter using subjected Roll Width or Coil Size.
Download Excel Sheet for doing 4 Ply Job Calculation.
Liquid Ink = 4 times of dry ink. Assuming 25% solid content in liquid ink.
Printing Layer – Pet
Film Density – 1.4
Film Micron – 12
Film gsm – 16.8
Job Sample Ink gsm – 1.2
Printing Layer Quantity – 300 kg
Dry ink required = (ink gsm x printing Quantity)/printing Layer gsm
= (1.2 x 300) / 16.8
= 21.42 (dry ink)
Liquid Ink = 4 times x dry ink (solid content of liquid Ink 25%)
= 4 x 21.42 = 85.68 kg (Liquid ink)