I. Product Definition and Technical Background

Thyssen's nano pigment PETG masterbatch is a colored particle made by uniformly dispersing high-concentration organic pigments in a copolyester (PETG) base resin using high-shear melt blending technology, with preformed nano pigments as the colorant. Compared with traditional oil-soluble dye-based masterbatches, this product uses molecular-level stabilized organic pigments (such as phthalocyanine, quinacridone, perylene, azo condensation type, etc.) to achieve ultrafine dispersion (particle size ≤ 100nm) in the PETG system, offering excellent transparency that can approach the light transmittance of dyes while maintaining high weather resistance. It endows the final products with outstanding physical and chemical properties.

II. Core Performance Advantages: High-performance Organic Pigments vs Oil-soluble Dyes 

Advantage of solvent resistance 

Indicator 

Organic pigment masterbatch 

Oil-soluble dye masterbatch 

Mechanism of action 

The pigment is dispersed as solid particles with a particle size of 90 nanometers and is insoluble in solvents. 

Dye molecules dissolved in the resin are easily extracted by solvents. 

Alcohol resistance 

It shows no color fading after being soaked in ethanol and isopropanol (≥99%) for 96 hours, and the liquid shows no obvious color change. 

There was obvious color seepage after soaking in 30% ethanol for 24 hours. 

Ester-resistant solvents 

Resistant to erosion by plasticizers such as ethyl acetate and DOP 

Undergo molecular-level dissolution and migration in ester solvents 

Oil resistance 

Complies with FDA 21 CFR 177.1315 edible oil test 

Color bleeding occurs upon contact with grease. 

Test standards 

ASTM D543, ISO 2812-1

Engineering value: It is suitable for packaging that needs to come into contact with detergents, cosmetics, oily foods, and medical devices. 

2. Advantage of Migration Resistance 

Migration Type 

Organic pigment performance 

Defects of oil-soluble dyes 

Contact migration 

Grade 0 - No migration (ISO 105-A03) 

Level 3-4 (Significantly contaminated adjacent items) 

Precipitation migration 

No small molecule precipitation (Tg > 80℃ to lock the pigment) 

Dye molecules diffuse to the surface to form "blooming". 

Hot migration stability 

No migration at 200°C for 1000 hours (DIN 53775) 

Significant migration occurs at 80℃. 

Plasticizer-induced migration 

Resist DINP/DIDP and other phthalate plasticizers 

Rapid migration occurs due to mutual solubility with plasticizers. 

Engineering value: Ensuring the color reliability of multi-layer composite products, precision electronic components, and long-service-life products. 

3. Environmental protection and regulatory compliance advantages 

Dimension 

Organic pigment masterbatch 

Risk of oil-soluble dyes 

Heavy metal content 

Compliant with EN 71-3, RoHS 2.0 (Pb, Cd, Hg, Cr⁶⁺ ≤ 0 ppm) 

Azo dyes are prone to contain restricted heavy metals. 

Polycyclic Aromatic Hydrocarbons (PAHs) 

ND (Not Detected, verified by GC-MS) 

Coal tar dyes contain benzo[a]pyrene and other substances. 

Food contact safety 

Compliant with EU 10/2011 and FDA 21 CFR 178.3297 

Dyes are prone to migrate into food and cause contamination. 

Ecotoxicity 

Non-bioaccumulative (OECD 305 test) 

Some dyes are mutagenic (positive in the Ames test). 

Engineering value: Meeting the mandatory compliance requirements in fields such as medical care, food packaging, and children's products. 

III. Typical Application Fields and Terminal Products 

The high-end packaging field 

Food packaging: 

Transparent / semi-transparent salad boxes, baking containers (resistant to oil migration) 

Carbonated beverage bottle cap (with color change due to CO₂ permeability) 

Heat-formed dinner plates (microwave-safe up to 120℃) 

Cosmetics packaging: 

Perfume bottles, lotion pumps (resistant to alcohol and fragrance erosion) 

Lipstick tube (anti-lipstick oil migration) 

2. Medical Device and Pharmaceutical Packaging 

Three-way valve of disposable infusion set 

Inhaler housing (resistant to isopropyl alcohol disinfection) 

Blister packaging aluminum-plastic film (without drug component adsorption) 

Laboratory consumables (pipette tip racks, centrifuge tube racks) 

3. Consumer Electronics and Appliances 

Bluetooth earphone charging case (resistant to sweat corrosion) 

VR glasses frame (anti-cosmetics migration) 

Appliance control panel (resistant to cleaning agent wiping) 

Anti-hand-sweat migration discoloration keyboard keycaps 

4. Automobiles and Transportation Components 

Interior car parts (armrests, storage boxes, resistant to sunscreen migration) 

Charging pile shell (resistant to gasoline and antifreeze splash) 

Weather-resistant and UV-resistant lock column for shared bikes 

5. Sustainable Products 

Reusable coffee cup (alkali-resistant detergent) 

PETG fiber woven shopping bag (colorfast after 50 washes) 

3D printing filament (no nozzle carbonization, high color consistency) 

IV. Suggested Technical Parameters 

Project

Standard value 

Pigment content 

10 - 20% (90-nanometer pigment ultrafine formula) 

Particle size distribution (D50) 

≤ 0.1 μm (HAAKE Rheomix test) 

Melt Index (210℃/2.16kg) 

15-35 g/10min

Heat resistance 

240 degrees for 15 minutes 

Weather resistance (QUV340 500h) 

ΔE ≤ 1.0 (ISO 4892-3) 

Weather resistance (QUV 3000h) 

ΔE ≤ 3.0 (ISO 4892-3) 

V. Although the initial cost of organic pigment-based PETG masterbatch is 30-50% higher than that of dye-based products, it relies on: 

Eliminate customer returns caused by relocation (such as contaminated cosmetic packaging). 

✅ Extend the service life of products (improve the color retention of outdoor products by 3 times) 

✅ Zero risk of regulatory violations (avoid REACH SVHC penalties) 

In high-end application scenarios, higher requirements are an inevitable choice for catering to consumption upgrades and green manufacturing. 

Technical Consultation: Dongguan Thyssen New Materials Co., Ltd. 

Version Number: PETG-OCP-TDS Rev 3.0 

Release Date: June 30, 2025