High-Clarity Packaging Film
Description
Technical Parameters
High-Clarity Packaging Film is a flexible packaging substrate engineered with optical properties designed to maintain maximum light transmission and low haze values. Formulated from refined polyolefin resins through specialized extrusion processes, it serves as a transparent outer print web or an unprinted product window layer in laminated structures. This film allows clear inspection of packaged contents, such as bakery items, fresh produce, and dry snacks, on retail displays. It integrates smoothly across vertical form-fill-seal and horizontal form-fill-seal packaging equipment.
Key Features
Optical Clarity: Maintains haze values below 2.0%, ensuring accurate color and product visibility for retail display.
Surface Energy: Treated to a minimum of 38 dynes/cm, providing uniform ink wet-out and lamination bond strength during converting.
Tensile Performance: Exhibits balanced tensile properties to withstand web tension during high-speed printing and packaging.
Seal Performance: Forms consistent heat seals across standard temperature windows without optical distortion in the sealed zone.
Applications
Window Pouches: Laminated into multi-layer stand-up or block-bottom pouches as a transparent display panel.
Fresh Produce Overwraps: Converted into clear perforated or non-perforated film for retail agricultural packaging.
Snack & Bakery Packaging: Applied as an unprinted or reverse-printed outer web to showcase food textures.
Bundle Overwrapping: Utilized on automatic wrapping machinery for secondary group packaging while retaining visual transparency.
Materials & Specifications
|
Parameter |
Specification Range |
Test Standard |
|
Material Base |
BOPP / Cast PP / High-Clarity PE |
- |
|
Thickness |
15 – 80 µm |
ASTM D374 |
|
Haze |
≤ 2.0% |
ASTM D1003 |
|
Gloss (45°) |
≥ 85 GU |
ASTM D2457 |
|
Tensile Strength (MD/TD) |
120–220 / 180–280 MPa |
ASTM D882 |
|
Surface Dyne Level |
≥ 38 dynes/cm |
ASTM D2578 |
|
Heat Seal Strength |
≥ 1.5 N/15mm |
ASTM F88 |
|
Core Diameter |
76 mm / 152 mm |
Industry Standard |
How to Choose
To determine the correct film specification, provide the following parameters during inquiry:
Packaged Item:
Type of product, weight, and shelf life requirements.
Structure:
Monolayer application or specific lamination layer sequence.
Equipment:
Converting method, printing type, and packaging machine speed.
Dimensions:
Required thickness, roll width, outer diameter, and core size.
Regulatory Needs:
Specific food-contact compliance or anti-fog requirements.
FAQ
Q: How does heat sealing affect the visual clarity of the film?
A: The resin formulation prevents optical blurring during thermal processing. Operating within recommended sealing temperature ranges produces strong, clear seams without localized haze buildup.
Q: What corona treatment level is maintained for printing and lamination?
A: Films are treated to a minimum surface energy of 38 dynes/cm. This level supports proper ink anchorage for flexographic and rotogravure printing as well as adhesive lamination bonding.
Q: Does the film comply with food-contact safety regulations?
A: Yes. The raw materials comply with international regulatory frameworks, including US FDA 21 CFR and EU No 10/2011 standards for direct food contact safety.
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