In the realm of fiber spinning, PP/PET white masterbatch plays a pivotal role. It imparts exceptional performance and aesthetic appeal to various fiber products. Today, let’s delve into this remarkable white masterbatch designed specifically for textiles.
Features and Physical Properties
| TDS of PP/PET White Masterbatch for Fiber Spinning | ||
| Property | Typical Value | Test Method/Notes |
| TiO₂ Content | 70% (rutile, micronized <0.3 μm) | High opacity (L* >95, CIE scale); fine particles prevent spinneret clogging. |
| Carrier Resin | Polypropylene (PP) or Polyethylene Terephthalate (PET) | Matches base polymer for fiber spinning; high-viscosity PET for staple fibers. |
| Melt Flow Index (MFI) | 20-50 g/10 min (230°C/2.16 kg for PP; 280°C/2.16 kg for PET) | Ensures smooth extrusion and fiber draw-down; minimizes melt fracture. |
| Density | 1.8-2.2 g/cm³ | ASTM D1505; reflects high TiO₂ loading. |
| Ash Content | 70-75% | Indicates TiO₂ and minimal fillers; tested via combustion analysis. |
| Dispersion Quality | Excellent (filter pressure <1.1x base resin; no specks >5 μm) | Hegman gauge or filter test; critical for defect-free fibers. |
| Moisture Content | <0.05% | Prevents hydrolysis in PET; pre-dry at 100-120°C for 4 hours if needed. |
| Processing Temperature | 220-290°C | Optimized for melt spinning; avoid >300°C to prevent degradation. |
| Let-Down Ratio | 2-5% (1:20 to 1:50) | Adjust for desired opacity; lower ratios due to high TiO₂ content. |
| Applications | ASTM D1505 reflects high TiO₂ loading. | Ideal for textiles requiring high whiteness and UV stability. |
| Storage/Shelf Life | Cool, dry conditions; 12-18 months | Polyester staple fibers, non-woven fabrics, filament yarns, and recycled fiber spinning |
High Concentration and High Opacity
One of the standout features of PP/PET textile-specific white masterbatch is its high content of up to 70% rutile titanium dioxide (TiO₂), micronized to a particle size of less than 0.3 microns. This provides exceptional opacity (L* > 95 on the CIE color scale), delivering outstanding whiteness and opacity to fibers. This high opacity not only enhances the visual effect of the fibers but also reduces the usage of base resin, lowering costs.
Carrier Resin Compatibility
The carrier resin is polypropylene (PP) or polyethylene terephthalate (PET), which perfectly matches the base polymer used in fiber spinning. In particular, the high-viscosity PET carrier resin is ideal for staple fiber production. This compatibility ensures seamless integration with the base resin during the spinning process, guaranteeing fiber quality and performance.
Excellent Processing Performance
This white masterbatch exhibits superior melt flow index (MFI) under specific conditions (PP: 20-50 g/10 min at 230°C/2.16 kg; PET: 20-50 g/10 min at 280°C/2.16 kg), facilitating smooth extrusion and fiber draw-down while minimizing melt fracture. Additionally, its density ranges from 1.8-2.2 g/cm³, with an ash content of 70-75%, reflecting its high TiO₂ loading and minimal filler content.
Outstanding Dispersion Quality
Dispersion quality is crucial for fiber integrity. The PP/PET white masterbatch offers excellent dispersion, with filter pressure less than 1.1 times that of the base resin and no specks larger than 5 microns. This can be verified through Hegman gauge or filter tests, making it essential for producing defect-free fibers.
Low Moisture Content
Moisture content is controlled below 0.05%, which is particularly critical for PET materials, as excess moisture can lead to hydrolysis. If necessary, pre-dry at 100-120°C for 4 hours to ensure stability during spinning.
Application Areas
PP/PET white masterbatch is widely used in the production of various fiber products. It is suitable for polyester staple fibers, non-woven fabrics, filament yarns, and recycled fiber spinning. In non-woven products like medical textiles and diapers, it provides high whiteness and UV stability; in polyester staple fibers for apparel and upholstery, it offers beauty and durability; and in filament yarns for technical textiles, it plays a key role.
Potential Issues in Application and Solutions
Fiber Tensile Strength Reduction
Due to the high TiO₂ loading, additions exceeding 5% may slightly reduce fiber tensile strength. To address this, conduct spinning trials beforehand to determine the optimal addition ratio, balancing whiteness and fiber performance.
Flow Inconsistencies
Compatibility between different base resins and the masterbatch may cause flow inconsistencies. Before use, perform compatibility tests to ensure smooth spinning. If issues arise, adjust processing temperatures or add appropriate additives to improve flow.
Moisture Impact
If exposed to humid environments, the masterbatch may absorb moisture, affecting spinning quality. Store it in sealed packaging in a cool, dry environment (temperature < 30°C, relative humidity < 60% RH). If moisture is suspected, follow the recommended pre-drying procedure.
How to Choose the Right PP/PET White Masterbatch for Fiber Spinning
Consider the Base Resin
First, select a masterbatch that matches the base resin used in fiber production to ensure good compatibility and processing performance. For example, for PET fiber production, opt for a white masterbatch with a PET carrier resin.
Define Performance Requirements
Based on the end-use and performance needs of the product—such as whiteness, opacity, and UV stability—choose a masterbatch with the corresponding features. For products requiring high whiteness and outdoor durability, select one with high TiO₂ content and excellent UV resistance.
Focus on Processing Performance Indicators
Key indicators like melt flow index and dispersion quality are vital for smooth spinning. Choose a masterbatch that aligns with your production equipment and processes to ensure efficiency and product quality.
Refer to Supplier Experience
Selecting a supplier with extensive experience and a strong reputation is key to obtaining high-quality masterbatch. They can provide professional technical support and customized services to meet diverse production needs.
If you’re looking for high-quality PP/PET white masterbatch for fiber spinning, feel free to consult DOME Materials. We offer customized solutions to safeguard your fiber production.
