Requirement for High-Quality Sewing Threads
We are seeking reliable suppliers for 165-200 yard spools in 100% polyster 34/2 and 40/2 counts. We have strict quality standards that must be met. Below are the detailed requirements for suppliers. Only those who can provide lab reports and certifications need to respond.
Thread Specifications
• Counts: 34/2 and 40/2.
• Spool Length: 165-200 yards.
• Spool Type: Plastic spools (2 inches long, 1 inch diameter), no labels or printing, with end slots for thread locking.
Quality Metrics and Standards
1. Tenacity (Strength):
• 34/2: 1200-1500 grams (Target: 1300 grams).
• 40/2: 1000-1200 grams (Target: 1100 grams).
2. Elongation:
• 34/2: 12-18% (Target: 15%).
• 40/2: 15-20% (Target: 18%).
3. Color Fastness (ISO 105 Standard):
• Washing Fastness: Grade 4.
• Light Fastness: Grade 4-5.
• Rubbing Fastness: Grade 4 (dry), Grade 3-4 (wet).
4. Shrinkage:
• 34/2: 1-1.5% (Target: 1%).
• 40/2: 1-2% (Target: 1.5%).
5. Lint: Less than 0.5% (Target: 0.3%).
6. Abrasion Resistance:
• 34/2: 15,000+ stitches (Target: 16,000 stitches).
• 40/2: 10,000+ stitches (Target: 12,000 stitches).
7. Twist Per Inch (TPI):
• 34/2: 18-22 TPI (Target: 20 TPI).
• 40/2: 20-25 TPI (Target: 22-23 TPI).
8. Moisture Content: 3-5% (Target: 4%).
9. Knot-Free: 99.9% (Target: 99.95%).
10. Sewability: 98-100% success rate (Target: 99%).
Additional Requirements
• Raw Material: High-tenacity polyester, lint-free.
• Finishing: Silicone-based finish for smooth performance on high-speed machines.
• Certification: Threads must be eligible for OEKO-TEX certification.
Supplier Expectations
• Provide your rates for producing threads meeting these standards.
• Submit a sample lot (10-20 spools) for testing.
• Share lab reports verifying the above quality metrics.
• Provide production capacity (spools per month).
How to Respond
Only suppliers who can meet these standards with documented proof should contact us. Send your rates, sample availability, and lab reports to my email
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