Packaging Knowledge
Flexible packaging knowledge is essential for choosing the right materials.Flexible packaging bags are mainly made of plastic films and composite materials. After printing, laminating and bag making, they are widely used in food, daily chemicals, apparel and many other industries. They are lightweight, well-sealed and cost-effective.
Common Bag Types
1.3-side Seal Bag
Sealed on three sides with simple structure and low cost. It is widely used for snacks, samples and small accessories.
2.Stand-up Pouch
With a special bottom design to stand steadily on shelves. It has excellent display effect and is commonly used for food and daily chemical products.
3.Zipper Bag
Equipped with a reusable zipper for easy opening and closing. It keeps contents dust-proof and moisture-proof, perfect for dry goods, snacks, apparel and storage items.
4.Special-shaped Bag
Featured with unique and irregular shapes. It helps create distinctive packaging and enhance brand influence.
5.Oil Pouch
Specially designed for cooking oil, seasoning oil and sauces. It is oil-resistant, leak-proof and tightly sealed.
6.Daily Chemical Bag
Applied for laundry detergent, body wash, facial masks and other products. It resists acid and alkali, suitable for liquid and cream goods.
7.Apparel & Storage Bag
Most of them are highly transparent, dust-proof and moisture-proof, ideal for clothing and daily necessities storage.
8.Printed Roll Film
Supports automatic filling and bag making on production lines. It is the best choice for mass production.
Common Raw Materials
We adopt food-grade raw materials, including PE, PET, CPP, PA, AL, VMPET, VMCPP and BOPP. Different materials have different features in toughness, transparency, barrier property and heat resistance.
Multi-layer composite structures can be customized to achieve functions like moisture proof, anti-oxidation, light shielding and puncture resistance, to make the packaging safe and durable.
Main Performance Features
1.Barrier Property: Blocks oxygen, moisture and light to prolong shelf life, which is essential for food packaging.
2.Temperature Resistance: Suitable for normal temperature, cold storage or high temperature conditions.
3.Puncture Resistance: Prevent bags from being broken by hard or granular contents.
4.Sealing Performance: Strong heat seal to avoid liquid and air leakage.
Surface Processing
1.Printing: Custom patterns, logos and texts with standard color printing.
2.Matte Finish: Creates elegant matte texture for high-end packaging.
3.Hot Stamping: Adds metallic luster to upgrade product grade.
4.UV Coating: Forms bright and layered visual effects on the bag surface.
Simple Ways to Distinguish PackagingBags
1.Soft texture usually means PE material; stiff and crisp surface refers to PET or BOPP; thick and tough bags generally contain Nylon.
2.Fully transparent bags are made of pure plastic films, while silver opaque ones adopt metallized film or aluminum foil.
3.Qualified products have flat and firm sealing edges.
4.Formal food-grade materials have no strange smell.
