The Journey of a Bag

A Technical Guide for Buyers & Students

At Mega Polybag in Morbi, we believe in transparency. Whether you are a Purchase Manager ensuring quality or an Engineering Student writing a project report, this guide explains exactly how raw granules turn into the strongest packaging on the market.

Step 1: Extrusion (The Tape Plant)

It all starts with mixing Polypropylene (PP) granules with Anti-Fibrillation agents and Calcium Carbonate. This mix is melted at high temperatures (approx 250°C) and stretched into thin, flat tapes.

🎓 For Students: In your report, mention that "Denier" is the unit of measure for the thickness of these tapes. Higher Denier = Thicker Tape.

Step 2: Weaving (Circular Looms)

These tapes are loaded onto Circular Looms. The machine weaves the tapes in a crisscross pattern (Warp and Weft) to create a cylindrical fabric tube. This is where the bag gets its strength.

Step 3: BOPP Lamination (The Branding Layer)

For our premium bags, we laminate a reverse-printed BOPP Film onto the woven fabric. This serves two purposes:

Protection: It makes the bag moisture-resistant.
Beauty: It allows for photographic printing quality (Glossy or Matt finish).

Step 4: Cutting & Stitching (Finishing)

The long rolls of fabric are cut into individual bags. The bottom is stitched with a strong fold (often double-stitched for heavy loads like cement or fertilizer).

🎓 For Buyers: Always check the "Stitch Count" per inch. Low stitch count can lead to leakage of fine powders like tile adhesive.

Industrial Visits & Internships

We welcome students from Gujarat's colleges to learn about plastic engineering. Practical knowledge is the future of India's manufacturing sector.

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