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Step 1: Look at the Packing Machine
The first step in choosing food packaging roll film is understanding your packing machine. Different machines have different requirements for film coefficient of friction (COF), heat sealing window, roll width, film tension and eye mark registration. VFFS and HFFS machines need film that runs smoothly through forming tubes and sealing jaws without stretching or wrinkling.
Before selecting a material structure, confirm your machine type, maximum roll width, core size, unwinding direction, eye mark spacing and heat sealing temperature range.
- VFFS machines need film with controlled COF for smooth tube forming
- HFFS machines may require different heat seal layer thickness and dwell time
- Eye mark registration accuracy depends on print repeat length and sensor type
Step 2: Look at the Product Condition
The product being packed directly affects the material structure. Dry snacks need moisture barrier. Powder products need strong seals. Frozen food needs cold-temperature toughness. Oily products need grease-resistant inner layers.
These factors determine whether you need PET/PE for basic protection, PET/VMPET/PE for improved barrier, or PET/AL/PE for high-barrier applications.
- Dry snacks: moisture barrier and crispness retention
- Powder: seal integrity and anti-static if needed
- Frozen food: low-temperature flexibility
- Oily products: grease-resistant inner sealant layer
Step 3: Look at Display and Shelf-Life Requirements
The retail environment and expected shelf life determine the final material and printing choices. Transparent display needs film with good clarity. Light-sensitive products may use metallized or aluminum foil. High-end brands may choose matte finish.
Short shelf-life products may only need basic moisture protection. Medium shelf-life snacks typically use PET/VMPET/PE. Long shelf-life products may need PET/AL/PE. If unsure, send product details to Huasheng Packaging for a material recommendation.
- Transparent display: high-clarity film structures
- Metallized barrier: VMPET layer for moderate to high barrier
- Aluminum foil: highest barrier for oxygen and light-sensitive products
Danh sách mua hàng thực tế
- Packing machine type
- Roll width and core size
- Film winding direction and eye mark spacing
- Product type and sensitivity
- Filling temperature
- Target shelf life
- Display requirements
- Printing colors and artwork
- Order quantity
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Câu Hỏi Thường Gặp
What information is needed before choosing food packaging roll film?
Packing machine type, roll width, product type and condition, filling weight, target shelf life, barrier requirements, printing colors and artwork file.
What causes roll film to run unstably on packing machines?
Common causes include incorrect COF, poor film tension control, eye mark misalignment, film thickness variation, static buildup and heat seal layer not matching machine settings.
Which material structure is suitable for snack roll film?
Typical snack packaging uses PET/PE for basic moisture protection or PET/VMPET/PE for better barrier and crispness retention.