TML Packaging Co., Ltd. is one of the most reliable manufacturers and suppliers of pearlized labels in China. If you're going to wholesale bulk pearlized labels made in China, welcome to get quotation and free sample from our factory. All customized products are with high quality and low price.

Product Overview

Pearlized Labels are co-extruded multi-layer biaxially oriented polypropylene film labels engineered for high-speed roll-fed wrap-around packaging lines. Built on a dense white opaque base with micro-voided light-scattering technology, Pearlized Labels deliver a smooth metallic-like sheen without foil stamping. The low-density structure offers high tensile strength and stiffness, ensuring precise cutting, clean hot-melt adhesive pickup, and high-contrast ink adhesion under high humidity and variable filling temperatures.

Technical Specifications

Specification	Technical Value / Standard Option
Material Base	Pearlized BOPP Film
Film Thickness	30 μm, 35 μm, 38 μm, 40 μm, 50 μm (Tolerance: ±5%)
Density	0.55 – 0.70 g/cm³
Tensile Strength (MD)	≥ 110 MPa
Tensile Strength (TD)	≥ 180 MPa
Elongation at Break (MD)	≤ 160%
Surface Tension (Dyne Level)	≥ 38 dynes/cm (Print Side)
Opacity	≥ 85%
Roll Width	100 mm – 1000 mm (Precision Slitting: ±0.5 mm)
Core Inner Diameter	76 mm (3 inches) / 152 mm (6 inches)
Printing Process	1–10 Color Rotogravure / Flexo Printing
Color Control	Delta E < 1.5 (Pantone / CMYK)
Application Speed	Compatible with lines up to 45,000 bottles/hour

Material Features

Micro-Voided Luster Structure
Incorporates internal microscopic voids to reflect light evenly, providing high opacity and visual metallic sheen while reducing overall package weight.

Machine-Direction Rigidity
High tensile modulus prevents film stretching, curling, or continuous tension drift during rotary cutting and high-speed web handling.

High-Dyne Surface Treatment
Surface energy above 38 dynes/cm ensures rapid ink anchoring and eliminates pinholes, flaking, or ink bleeding during high-speed printing.

Target Applications of Pearlized Labels

Beverage Containers

Wrap-around coverage for PET, HDPE, and glass bottles containing mineral water, juices, carbonated soft drinks, and sports beverages.

Personal Care Packaging

Moisture-proof labeling for body wash, shampoo, liquid soap, and lotion containers exposed to wet shower environments.

Food and Cooking Oils

Oil-resistant surface barrier preventing grease migration and label degradation on vegetable oil, sauce, and condiment bottles.

Printing and Surface Finishing

Rotogravure Printing
Delivers precise ink density and gradient transitions for high-volume orders requiring long-run color consistency across millions of units.

Flexographic Printing
Offers crisp line art, tight register control, and cost-efficient setup times for medium-to-large production runs.

Protective Surface Varnishes
• High-Gloss Varnish: Enhances color vibrancy and optical depth under retail lighting.
• Matte Finish: Creates a soft-touch, non-reflective surface appearance.
• Anti-Scuff Coating: Protects ink layers against friction during transportation and automated conveyer sorting.

Quality Control Procedures

Raw Material Testing

Every master roll undergoes dyne level verification, gauge consistency checks across 20 test points, and opacity measurements before release to print shop floors.

In-Line Optical Inspection

High-resolution web cameras continuously scan printing runs to detect registration misalignment, color shifts, ink spots, and surface pinholes instantly.

Converting and Roll Winding Verification

Slit rolls are tested for edge smoothness, uniform winding hardness, precise static control, and outer diameter accuracy to prevent jam-ups during customer application.

Customized Ordering Parameters

Dimensional Setup
Provide precise label length, label width, roll unwinding direction, and maximum roll outer diameter based on labeling machine limits.

Artwork and Color Profiles
Supply vector files in AI or PDF format with target Pantone color codes or physical target samples for pre-press color matching.

Processing Requirements
Specify required varnish type, container material type, line application speed, and filling conditions (hot fill, cold fill, or ambient).

Advantage of Pearlized Labels

Production Line Efficiency

Optimized film stiffness reduces downtime caused by misfeeds, static buildup, or improper hot-melt adhesive distribution.

Lower Material Mass

Low film density provides more square meters of label area per kilogram compared to solid white BOPP or paper materials.

Container Compatibility

Formulated to bond securely with hot-melt adhesives across PET, HDPE, PP, and glass bottle surfaces without edge flagging.

Quotation Checklist

To obtain an accurate technical proposal and pricing, submit the following specs:

Label width and cut length

Container shape, material, and neck diameter

Preferred film thickness

Total color count and surface finish

Target order volume

Roll unwinding direction and core size

FAQ

Q: How does pearlized BOPP perform under refrigerated or moist conditions?

A: The non-porous polypropylene structure resists water absorption, preventing label wrinkling, swelling, or ink degradation in cold and humid storage environments.

Q: What hot-melt adhesives work best with pearlized wrap-around labels?

A: Standard commercial hot-melt adhesives (EVA or synthetic rubber base) formulated for wrap-around labeling achieve fast initial tack and strong seam bonding on this substrate.

Q: What is the minimum line tension required during high-speed application?

A: The material maintains structural stability across a wide web tension range; specific machine tension settings can be calibrated using sample test rolls prior to full production.

Q: Can pearlized film be printed with metallic inks or foil elements?

A: Yes, the smooth dyne-treated surface accepts metallic inks, tactile varnishes, and spot matte/gloss combination effects without compromising ink adhesion strength.

Q: How are label rolls packaged to prevent damage during international transport?

A: Rolls are wrapped in moisture-proof plastic film, fitted with core edge protectors, suspended in sturdy wooden crates, and palletized to prevent deformation during maritime transport.

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