Milky White PET Film
Product Description： Item name: 30um BOPP single sided silicone release film Structure: Product parameters： Application FAQ 1/Can you make our design for the package? Yes, please send us the design you need ,we will value the price and make the exact same package basing on your design....
- Fast Delievery
- Quality Assurance
- 24/7 Customer Service
Product Introduction
Milky White PET Film is a biaxially oriented polyester (BOPET) film that achieves its distinctive soft-white, semi-transparent appearance through controlled crystallization and precisely dosed light-diffusing fillers - not surface pigmentation. The result is a film with uniform opacity, excellent mechanical strength, and consistent thermal stability that outperforms standard white-tinted films in demanding industrial applications.
Unlike calendered PVC or cast PP alternatives, BOPET film offers superior tensile strength (150–220 MPa), dimensional stability at elevated temperatures, and a surface that accepts corona treatment, chemical priming, and adhesive coating for downstream converting processes.
Available in thicknesses from 25 μm to 250 μm, with adjustable opacity levels and a full range of surface treatments, our milky white PET film is supplied in jumbo rolls, precision slit rolls, cut sheets, or custom die-cut components - ready for your production line.
Customization Options
Thickness
25 μm to 250 μm - specify your requirement. Thinner grades (25–50 μm) for label facestocks and lightweight packaging; mid-range (75–125 μm) for electrical insulation; heavy grades (150–250 μm) for structural and dielectric applications.
Opacity Level
Soft white (60–70% transmittance) for premium translucent packaging; high-opacity white (20–40% transmittance) for applications requiring maximum light blocking and print contrast.
Surface Treatment
Corona treatment - for improved ink adhesion in printing applications
Chemical primer coating - enhances bond strength with adhesives and laminates
Adhesive-ready coating - pressure-sensitive adhesive compatible for label stock
Quality Control
Incoming resin certification and melt-flow testing
In-line gauge monitoring during biaxial orientation
Batch testing: tensile strength, elongation, thermal shrinkage, transmittance, surface energy (dyne level)
Visual inspection for optical defects before slitting and packing
Technical Specifications
| Parameter | Standard Range | Description |
|---|---|---|
| Material | BOPET (Biaxially Oriented Polyester) | Virgin resin |
| Thickness | 25–250 μm | Customizable to application |
| Width | 1000–1600 mm | Special widths on request |
| Color / Appearance | Milky White (matte) | Soft diffused white tone |
| Transmittance | 20–70% | Adjustable via filler formulation |
| Tensile Strength (MD/TD) | 150–220 MPa | High durability for converting |
| Elongation at Break (MD) | 80–150% | Grade-dependent |
| Heat Resistance (Continuous) | 120–150°C | Short-term peak: 180°C |
| Thermal Shrinkage (MD) | ≤1.5% | At 150°C / 30 min |
| Surface Treatment | Corona / Chemical Primer / Adhesive Coating | Application-specific |
| Certifications | RoHS, REACH | Additional testing on request |
| Standard Packing | Wooden crate + pallet | Export-grade |
| MOQ | 100 rolls | Samples available |
Product Feature
Controlled Milky White Appearance
Opacity is engineered at the filler level, not through surface coating. Transmittance is adjustable from 20% to 70%, allowing you to specify the exact degree of translucency required - from soft, diffused white for luxury packaging to higher-clarity grades for label facestocks.
High Tensile Strength and Dimensional Stability
150–220 MPa tensile strength ensures reliable performance through high-speed printing, laminating, and die-cutting. Low shrinkage (<1.5% at 150°C / 30 min) maintains registration accuracy in multi-pass converting processes.
Broad Thermal Tolerance
Stable performance from ambient to 150°C continuous operation, with short-term resistance up to 180°C. Suitable for applications involving heat-sealing, hot-foil stamping, and thermal lamination without deformation or discoloration.
Surface Treatment Versatility
Factory-applied corona treatment, chemical primer coating, or adhesive-ready surfaces - tailored to your downstream process requirements. All treatments are applied in-line for consistency batch to batch.
Customizable Physical Format
Supplied as jumbo rolls (1000–1600 mm width), precision slit rolls to your specified width, flat sheets, or OEM die-cut parts. Standard packing: wooden pallet with protective wrapping for export-grade transit protection.
Application
Graphic Printing & Label Facestock
The matte white surface with controlled opacity provides an excellent substrate for screen printing, UV offset, and flexographic printing. Die-cut labels, stickers, and decals benefit from the film's dimensional stability - maintaining registration through multi-color print passes and kiss-cutting.
Use case: premium product labels, durable equipment decals, outdoor-rated stickers.
Luxury Packaging
The soft, diffused white appearance - achieved through internal light-scattering rather than surface pigmentation - delivers a tactile, high-end look that resists scratching and fingerprint marking better than glossy films. Compatible with foil stamping, embossing, and lamination for premium gift boxes, cosmetics packaging, and brand presentation materials.
Electrical Insulation
BOPET's inherent dielectric properties combined with excellent thermal stability make milky white PET film a reliable insulation layer in transformers, motors, flexible printed circuits, and cable wrapping. Available in thicknesses up to 250 μm where higher dielectric strength is required.
Industrial Lamination & Protective Layers
Used as a carrier film, protective overlay, or laminating substrate in composite manufacturing, membrane switch construction, and surface protection applications. The matte finish reduces glare in end-use products while maintaining mechanical integrity during lamination.
Release Liner Base Film
When coated with silicone (available as an optional surface treatment), milky white PET film serves as a release liner for pressure-sensitive adhesives, medical dressings, and industrial tapes. The controlled opacity aids in visual detection during automated application.
certificate
FAQ
Q: What is the difference between milky white PET film and standard white PET film?
A: Milky white PET film achieves its opacity through internal light-diffusing fillers embedded during extrusion, producing a soft, matte appearance with depth. Standard white PET film typically relies on surface pigmentation or TiO2 loading, which can affect surface properties and print adhesion. Milky white film offers better scratch resistance and a more premium visual texture.
Q: Can you supply this film with a silicone release coating?
A: Yes. While the standard product is supplied as a base PET film with corona or primer treatment, silicone coating is available as an optional surface treatment for release liner applications. Please specify your release force requirements (easy, medium, tight) when inquiring.
Q: What printing methods are compatible with this film?
A: With corona treatment, the film is compatible with UV offset, flexographic, screen, and gravure printing. For demanding applications, chemical primer coating further enhances ink adhesion. We recommend specifying your printing method during consultation so we can apply the optimal surface treatment.
Q: What is your minimum order quantity?
A: Standard MOQ is 100 rolls. Free samples are available for evaluation. For new customer trials or specialty grades, smaller quantities can be discussed.
Q: Can you match a specific opacity or color target?
A: Yes. We can adjust filler loading to match a target transmittance range. For custom color matching (e.g., specific white tones or tinted variants), minimum order quantities may apply depending on the formulation complexity.
Hot Tags: milky white pet film, China, suppliers, wholesale, buy, price, Silicone Release Film Liner
