SMS (Spunbond-Meltblown-Spunbond) nonwovens are widely used in medical, hygiene, and industrial applications due to their balance of strength, filtration, and comfort. Choosing the wrong color masterbatch can compromise fiber integrity, filtration efficiency, or regulatory compliance, leading to costly rejects. Here’s a step-by-step guide to make informed decisions.
1. Compatibility with PP Resin
Why it matters: SMS non-wovens typically use polypropylene (PP) resin. The carrier resin of the masterbatch must be compatible with your PP base material to avoid delamination or strength loss.
Action Tip: Request PP-based masterbatch from suppliers and ask for melt flow index (MFI) matching data.
2. Temperature Resistance
Why it matters:In SMS production, the meltblown (M layer) process reaches temperatures of 250–300°C. Heat-resistant pigments prevent decomposition or discoloration.
Test Method: Request TGA (Thermogravimetric Analysis) reports from suppliers to verify pigment stability at high temperatures.
3. Filtration Efficiency (Critical for M Layer)
Why it matters: The meltblown layer is the core for filtering particles, bacteria, and viruses. Pigment particles can clog microfiber pores, reducing filtration performance (e.g., in N
4. Regulatory Certifications
Mandatory for Specific Applications :
Medical/Hygiene : FDA 21 CFR, ISO 10993 (biocompatibility), EU 10/2011 (food contact).
EU Market : REACH, RoHS (heavy metal-free).
Red Flag : Avoid masterbatches containing azo dyes or phthalates.
5. Color Consistency & Customization
Branding Needs:Custom Pantone/RAL colors to ensure consistency across batches.
Technology:Choose masterbatch with nano-dispersion technology to avoid fiber streaking or nozzle clogging.
Samples: Request free color chips and small trial batches.95 masks).
Solution:
Prioritize coloring the spunbond (S) layers to minimize impact on the M layer.
If coloring the M layer is necessary, choose masterbatch with sub-micron dispersion technology and test filtration efficiency (comply with ASTM F2100 )
6. Cost vs. Performance Balance
Dosage Optimization:High-quality masterbatch requires only 1-3% dosage, while inferior products may need 5% or more, increasing costs.
Hidden Costs: Evaluate indirect costs from reduced filtration efficiency or production downtime.
1.Define Requirements:Clarify application (medical, industrial), color needs, and certification standards.
2. Lab Testing: Collaborate with suppliers to test melt stability, filtration efficiency, and color fastness .
3. Pilot Production: Conduct small trial runs to validate performance on your production line
Q: Can I use the same masterbatch for S and M layers?
A: Yes, but confirm it doesn’t affect the M layer’s filtration performance. Test separate formulations for S and M layers.
Q: How to fix color migration in SMS nonwovens?
A:Choose migration-resistant masterbatch and control dosage (≤3%). Avoid low-molecular-weight dyes.
Q: Which is better: organic or inorganic pigments?
A: Inorganic pigments (e.g., titanium dioxide) offer better heat resistance for meltblown layers; organic pigments provide vibrant colors for spunbond layers.
Why Partner with OOPS COLOR
20+ Years Expertise:Specializing in nonwoven masterbatch, serving global medical and industrial clients.
Precision Formulation:Offering FDA/ISO pre-certified formulations to accelerate your time-to-market.
Global Support : End-to-end technical support, from color matching to mass production.
Contact us today for a free sample