Chemically Treated PET Film
- Material:Biaxially oriented PET / BOPET
- Thickness:12–50 μm common range
- Width:500–2200 mm available
- Color:Clear transparent, metallizing grade
- Treatment:One-side or two-side primer coating
- Use:Printing, metallizing, coating, lamination
Chemically Treated PET Film is a primer-coated polyester film for printing, lamination, coating, and vacuum metallizing where ink, aluminum, coating resin, or adhesive must bond securely to PET. As a Chemically Treated PET Film manufacturer, PET Film Supply Company makes one-side and two-side treated film for converting lines that need more than short-term corona activation. The chemical treatment layer helps reduce ink rub-off, weak metal hold, aluminum transfer loss, and laminate delamination.
Product Overview
Chemically Treated PET Film is made for converting work where untreated or only corona-treated PET may not give enough bonding stability. PET is strong, clear, heat resistant, and dimensionally stable, but its surface is difficult for ink, aluminum vapor, coating resin, and laminating adhesive to grip. The primer-coated surface gives the film a receptive layer while keeping the polyester base stable.
Surface tension matters, but it is not the only selection point. Treated side, ink system, adhesive type, storage time, roll direction, metal bond strength, and peel strength all affect performance. PET Film Supply Company checks treated-side consistency by dyne pen testing, visual inspection, roll cleanliness review, side confirmation, and sample tape-pull checks. Internal tests commonly control the treated surface around 48–54 dynes/cm, with thickness tolerance around ±3%.
One-side treatment is used when one surface needs printing, coating, or metallizing. Two-side treatment is better when both sides must keep adhesion after curing, aging, rewinding pressure, or secondary coating.
Benefits
- Stronger print adhesion:Helps solvent-based, water-based, and selected UV inks hold after drying, rewinding, and tape-pull checking.
- Better aluminum bonding:Supports metal layer hold and helps reduce aluminum transfer loss during lamination or slitting.
- Reliable lamination strength:Works with PU, acrylic, solvent-based, and solvent-free adhesives after peel and aging checks.
- More stable than simple corona treatment:Better for stored rolls or warm, humid workshop conditions.
- Cleaner converting surface:Controlled winding and inspection help reduce coating skips, fisheyes, weak spots, and uneven wetting.
- Flexible treated-side options:One-side or two-side treated PET film can match printing face, metallizing face, and roll direction.
How Does Chemical Treatment Improve PET Film Adhesion?
Chemical treatment improves PET film adhesion by placing a thin primer coating on the polyester surface. This layer acts as a bonding bridge between PET and ink, aluminum vapor, coating resin, or laminating adhesive. In production, it helps avoid poor wetting, ink rub-off, weak metal hold, aluminum transfer loss, and laminate delamination.
TDS
Item | Typical Data / Reference |
Product Type | Chemically Treated PET Film |
Base Material | Biaxially oriented polyester film |
Treatment Type | Primer coating / chemical treatment |
Treated Side | One side or two sides |
Thickness Range | 12, 15, 19, 23, 36, 50 μm |
Thickness Tolerance | ±3% typical reference |
Width Range | 500–2200 mm |
Appearance | Clear, smooth, low visible defect surface |
Surface Tension | 48–54 dynes/cm typical treated side |
Tensile Strength | MD ≥180 MPa, TD ≥200 MPa reference |
Heat Shrinkage | ≤2.0% at 150°C / 30 min reference |
Haze | ≤3.0% for clear grade reference |
COF | 0.35–0.55 typical, adjustable by grade |
Print Adhesion | Gravure, flexo, selected UV inks after tape test |
Aluminum Bonding | Aluminum vacuum metallizing and metal bond check |
Lamination Bonding | PU, acrylic, solvent-based, solvent-free adhesive after peel test |
Storage Condition | Dry, clean, away from heat and high humidity |
Suggested Testing | Dyne test, ink tape test, metal bond test, peel strength test |
Applications
- Metallized flexible packaging:For snack packs, dry food, coffee packaging, and barrier laminates requiring stable aluminum bonding.
- Printed laminates:For gravure and flexographic printing where ink must resist rubbing, rewinding, and adhesive lamination.
- Adhesive lamination:For multi-layer packaging or industrial laminates where peel strength after curing matters.
- Coating base film:For acrylic, PU, release, protective, or functional coatings after formula review.
- Label and graphic films:Helps improve ink or coating hold on clear polyester surfaces with low haze.
- Industrial converting:For production needing controlled treated side, stable roll quality, treated-side marking, and predictable behavior.
What Is the Difference Between Chemically Treated PET Film and Corona Treated PET Film?
Corona treated PET film raises surface energy through electrical discharge and helps initial wetting for printing or coating. The effect can reduce after storage, especially in humid or warm conditions. Chemically Treated PET Film uses a primer coating layer for a more stable bonding interface. In metallizing, printing, or adhesive lamination, failures often come from weak interlayer bonding, wrong treated-side selection, storage decay, uneven wetting, or adhesive incompatibility.
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FAQ
Is Chemically Treated PET Film the same as corona treated PET film?
No. Corona is surface activation; chemically treated PET film uses primer coating for stronger bonding stability.
Which side should be used for printing or metallizing?
The treated side should face the ink, aluminum vapor, coating, or adhesive.
Can this film be used with solvent-free adhesive?
Yes. Confirm curing temperature, coating weight, aging time, and peel-strength target.
What should be confirmed before production?
Confirm thickness, width, treated side, ink system, adhesive type, metallizing need, storage time, roll direction, target bond strength, and test method.
