Ningmei MB6408 | Premium High-Calorific Steam Coal with 0.5% Low Sulfur Content

Product Overview

Ningmei MB6408 is premium homopolymer polypropylene resin produced via standardized olefin gas-phase polymerization lines, specially engineered for flat yarn extrusion and woven sack manufacturing. With narrow molecular weight distribution and consistent melt tension, it drastically cuts filament breakage rates during high-speed raffia production.The base formula only incorporates thermal stabilizers, with zero slip or anti-block additives blended in, fully complying with global food contact safety regulations for dry grain and food woven packaging.Every production batch undergoes complete industrial physical performance testing, with official factory COA issued for full quality traceability. Backed by large-scale continuous polymerization capacity, this resin delivers ultra-stable batch consistency and reliable year-round supply with balanced comprehensive raw material cost level for packaging manufacturers. It runs smoothly on all mainstream single-screw extruders for uninterrupted mass production; its wide processing window minimizes frequent equipment parameter adjustments and stabilizes yarn forming quality to reduce uneven thickness defects. Relevant extrusion trial data can be verified by batch COA and customer production records upon request.The resin meets GB 4806.6, US FDA and EU 10/2011 food contact standards, suitable for daily woven goods and rigid packaging requiring strict food safety certification.

Basic Product Specifications

All listed figures are typical performance values, tested on standard 4mm injection molded specimens under 23°C ambient temperature. The product is supplied in original 25kg woven bags, filled with uniform milky white pellets free of black specks, gels and foreign impurities.

Density: 0.905 g/cm³ (ISO 1183)

Melt Flow Rate: 3.0 g/10 min (ASTM D1238, test condition: 230°C / 2.16kg)

Tensile Yield Strength: 32 MPa (ISO 527, test speed 50mm/min)

Elongation at Break: 140% (ISO 527, test speed 50mm/min)

Flexural Modulus: 1360 MPa (ISO 178)

Notched Izod Impact (23℃): 2.2 kJ/m² (ISO 180)

Heat Deflection Temperature (0.45MPa): 89°C

Core Product Advantages

Balanced Rigidity & Stable Tensile Performance

High-crystallinity homopolymer PP delivers reliable structural rigidity and uniform stretching performance, perfectly matching high-speed flat yarn drawing equipment to lower broken filament reject rates. Woven sacks, binding ropes and civil geotextiles made from this resin maintain stable dimensional stability under static load, extending finished product service life.

Low Auxiliary Migration for Food Contact Safety

Only thermal stabilizer is added during polymerization; no slip agent or anti-block additives are compounded. This greatly reduces additive bloom and surface migration risks, preventing contamination of dry grain and cold food stored inside woven packaging, fully meeting stringent global food contact compliance standards.

Moderate Chemical Resistance

The resin retains stable mechanical performance when exposed to dilute acid, dilute alkali, clean water and alcohol-based daily chemicals, helping sustain service performance of woven storage sacks under regular storage scenarios. Corrosion resistance test reports following standard plastic testing norms are available to check.It cannot withstand long-term contact with strong aromatic or ester organic solvents, and is not recommended for packaging highly corrosive media.

Stable Extrusion Processability

Medium and controlled melt flow enables full homogeneous plasticization for long-cycle uninterrupted extrusion, minimizing defects such as uneven yarn thickness and air bubbles. Compatible with all mainstream raffia extruder models, it stabilizes continuous production yield and maintains steady long-cycle operation of extrusion lines. Actual on-site production performance records from cooperating manufacturers can be supplied upon request.

Main Application Fields

Food Contact Woven Packaging

Food-grade woven sacks, dry grain storage woven bags and rigid cold food packaging containers. Its low additive migration and cross-region food compliance certifications make it ideal for non-oily dry food packaging scenarios.

Industrial Woven Articles

Core raw material for industrial bulk woven sacks, binding ropes, fishing nets and civil geotextiles. Not suitable for mechanical parts like gears and bearings, chemical liquid storage tanks, or long-term outdoor structural products, due to inherent weak UV resistance and low-temperature impact toughness.

Processing & Storage Guidelines

Processing Parameters

• Extrusion temperature range: 190–225°C (feed zone 190–200℃, metering zone 210–225℃). Recommended blending ratio of base PP resin to color masterbatch/auxiliary antioxidant is 95:5; small-batch trial extrusion is mandatory before mass formula production.
• Drying requirement: Ultra-low moisture absorption rate below 0.01%, pre-drying is unnecessary under sealed dry storage conditions. If pellets absorb ambient moisture, dry at 60–70°C for 1–2 hours to avoid thermal degradation and yellow discoloration during extrusion.

Storage Requirements

• Storage environment: Cool, dry and fully ventilated warehouse, ambient temperature controlled between 5–30°C, relative humidity maintained below 60%.
• Stacking limit: Stack height shall not exceed 5 layers to prevent bag deformation and pellet compaction that will disrupt extruder feeding stability.
• Shelf life: Valid for 2 years under standard storage conditions; implement strict first-in first-out inventory management. Isolate raw material stock from direct sunlight, heat sources, open flame and strong organic solvents to prevent pellet aging and contamination.

Frequently Asked Questions 

Q1: What is the quality warranty period of MB6408?A: 1-year warranty starting from delivery. Factory defects under proper storage/processing qualify for free replacement; misuse damage is excluded.

Q2: Can customized formula modification be supported?A: Custom color masterbatch blending is available. Base PP molecular performance can’t be adjusted without custom polymerization; send production demands for technical assessment.

Q3: How to guarantee intact pellet quality during transportation?A: Pellets are packed in thick rainproof woven bags. Professional chemical logistics avoid moisture and impact; each shipment comes with full batch COA for inspection.

Q4: What is the minimum order quantity?A: Standard MOQ is a 25-ton full container; small-batch supply is negotiable for long-term partners.

Q5: How to obtain accurate flat yarn extrusion operation guidance?A: Raffia extrusion parameter manuals are supplied with orders. Our polymer team offers online extrusion parameter support; full TDS, SDS and food contact certificates are available on request.

Product Summary

Ningmei MB6408 is cost-effective homopolymer polypropylene resin exclusively developed for flat yarn extrusion and raffia production. It features balanced tensile rigidity, low additive migration and ultra-stable extrusion processability. Widely applied in food-contact woven sacks and general industrial woven products, it fully satisfies mass production demands of woven bag, binding rope and packaging manufacturers.Supported by standardized large-scale polypropylene polymerization production lines and year-round sufficient raw material inventory, we provide complete TDS, SDS, multi-region food contact compliance certificates and original batch COA documents, paired with dedicated extrusion technical guidance for raffia manufacturers.If you require detailed technical parameter sheets or bulk purchase quotations, please directly contact our sales team for one-stop polymer raw material supply support and after-sales technical service.