Silver Metallized Polyester Film
- Material: PET substrate with vacuum-deposited aluminum layer
- Appearance: Bright silver metallic finish
- Structure: One-side metallization with selectable opposite-side treatment
- Supply: Jumbo roll or slit-to-width roll
- Core: 3 inch or 6 inch
- Uses: Packaging, labels, tape backing, lamination, industrial converting
Clear Adhesive Film Company is a manufacturer of silver metallized polyester film supplied in rolls for printing, lamination, slitting, and industrial converting. A thin aluminum layer is vacuum-deposited onto a PET substrate, giving the film a bright silver finish, controlled optical density, and improved barrier performance. Roll width, slit size, length, winding direction, surface treatment, and laminate requirements can be matched to the processing line.
Product Overview
Silver metallized polyester film combines PET dimensional stability with the optical and barrier benefits of aluminum deposition. The metal layer is formed on one side of the polyester web. The opposite PET surface can remain untreated or receive corona treatment or a coating for printing and adhesive lamination.
Optical density, gloss, reflectivity, and metallization uniformity should be checked separately. A higher optical density may improve opacity or barrier performance, but the selected grade still needs to suit the final laminate structure. For repeat orders, retain the approved sample with the metal-side orientation, winding direction, slit-width record, and treatment-side specification.
Benefits
- PET substrate supports stable rewinding, precision slitting, and lamination.
- Vacuum-deposited aluminum creates a uniform silver appearance without reducing flexibility.
- Reference optical-density grades such as 2.2, 2.5, and 2.8 support different appearance and barrier needs.
- Untreated, corona-treated, or coated opposite-side options suit different ink and adhesive systems.
- Treated-side labeling and winding-direction control reduce loading errors.
- Barrier data are easier to compare when temperature, RH, PET grade, and test method are stated.
Which Surface Should Be Identified Before a Metallized PET Roll Is Slit or Laminated?
Before rewinding or slitting, identify the metallized side, opposite PET surface, and loading direction. A treated or coated side may be needed for ink adhesion or adhesive bonding, while the metal side may require a different laminate contact surface. Check slit width, core size, edge cleanliness, and roll flatness before production. A short line trial can reveal metal transfer, wrinkles, weak ink adhesion, or insufficient laminate bond strength.
TDS / Technical Data Sheet
Item | Typical Value |
Material | PET substrate with vacuum-deposited aluminum layer |
Appearance | Silver metallic finish; standard or high-gloss grade |
Structure | One-side metallization; opposite side untreated, corona treated, or coated |
PET Thickness | Common reference range: 12-50 um; select by grade |
Roll Width | Jumbo roll or slit width; common reference range: 100-2050 mm |
Roll Length | Common reference range: 3000-12000 m; match to thickness and roll diameter |
Core Size | 3 inch or 6 inch; select by roll format |
Optical Density | Reference grades: 2.2, 2.5, or 2.8; select by appearance and barrier target |
Surface Treatment | Check specified side by agreed dyne-level method |
Gloss | Evaluate by agreed test angle |
Reflectivity | Evaluate by wavelength, angle, instrument, and approved sample |
Metallization Uniformity | Check across usable width or approved sample area |
Heat Shrinkage MD / TD | Report with PET grade, temperature, and duration |
Coefficient of Friction | Record metal side / opposite side test combination |
Tensile Strength MD / TD | Report by PET grade and agreed test method |
Elongation at Break MD / TD | Report by PET grade and agreed test method |
WVTR / MVTR | State temperature and RH with reported result |
OTR | State temperature and RH with reported result |
Winding Direction | Metal side inward or outward; treated side identified |
Slitting Quality | Record slit-width tolerance, edge cleanliness, and roll flatness |
Batch Approval | Retain approved sample, treatment-side record, and line-trial result |
Applications
- Flexible packaging intermediate web for moisture, oxygen, and light-barrier structures
- Label facestock requiring a clean silver metallic appearance
- Tape backing for selected industrial converting projects
- Printing and adhesive lamination with the correct treated-side match
- Insulation layers where PET dimensional stability is required
- Board lamination and specialty composite processing
When Is a Higher Optical Density Needed Instead of a Standard Metallized Grade?
A higher optical density may suit laminates requiring stronger opacity, a more consistent silver finish, or a higher barrier target. It is not automatically the best option for every silver metallized polyester film roll. Gloss, reflectivity, optical density, metallization uniformity, and metal adhesion should be checked separately. WVTR and OTR comparisons are useful only when temperature, RH, PET thickness, and laminate structure are stated. For repeat orders, compare each batch with the retained approved sample and check metal transfer, wrinkles, roll flatness, and slit-edge quality.
FAQ
Is silver metallized polyester film the same as aluminum foil?
No. It is a flexible PET roll with a thin vacuum-deposited aluminum layer.
Can the opposite side be prepared for printing or lamination?
Yes. The opposite PET surface can be matched to the required ink or adhesive system.
Which roll details should be specified before slitting?
Specify PET thickness, width, slit width, roll length, core size, metal-side orientation, winding direction, and edge-quality requirement.
How should barrier performance be compared?
Compare WVTR or MVTR and OTR only when test temperature, RH, PET grade, and laminate structure are stated.
