ZHONGTAI SG-3 PVC Resin with Viscosity Number 128 ml/g, Residual Vinyl Chloride 1 mg/kg, and Apparent Density 0.47 g/ml

ZHONGTAI SG-3 PVC Resin - Batch Quality & Technical Report

1. Executive Summary

The supplied Certificate of Analysis identifies the material as Polyvinyl Chloride Resin (PVC), Type SG-3, from Xinjiang Zhongtai Import & Export Co., Ltd. The production date and inspection date are both stated as October 2021. The execution standards shown are GB/T 5761-2006 and GB/T 4803-94.

All listed quality items are marked PASS. Where numerical test results are provided, the batch records viscosity number 128 ml/g, impurity particles 4 per 900 cm², apparent density 0.47 g/ml, 0.250 mm sieve residue 0.4%, grain count 5 per 400 cm², volatile matter and moisture 0.10%, and residual vinyl chloride content 1 mg/kg.

Several rows - including K value, the 0.063 mm sieve criterion, thermal whiteness and plasticizer absorbency - show no numerical batch result in the source but are nevertheless marked PASS. This report preserves that distinction and does not invent missing test values.

2. Product & Batch Identification

3. Certificate of Analysis Results

Source-transcription note: the viscosity-number range is printed as 135-127 ml/g. This report reproduces the source presentation rather than silently reversing it.

4. Compliance Margin Analysis

5. Technical Performance Interpretation

Grade characterization: The COA lists K value 70-72 and viscosity number 135-127 ml/g as grade-control criteria. A viscosity number of 128 ml/g is reported and accepted as PASS.

Cleanliness: Only 4 impurity particles per 900 cm² and 5 grains per 400 cm² are reported, both well below their stated maxima. These are batch-specific cleanliness indicators.

Apparent density: The measured 0.47 g/ml exceeds the minimum 0.45 g/ml. Apparent density is useful for powder handling and volumetric feeding calculations, although the COA provides no processing guidance.

Particle / sieve control: The 0.250 mm sieve residue is 0.4% against a maximum of 2%. The 0.063 mm criterion is minimum 90%, but the batch result is not numerically reported in the source.

Volatile matter and moisture: The batch result of 0.10% is below the 0.4% maximum and provides a favorable batch-specific moisture/volatile control result.

Residual VCM: The measured residual vinyl chloride content is 1 mg/kg against a maximum of 10 mg/kg. Finished-product regulatory suitability must still be assessed for the intended market and use.

Thermal whiteness: The source requires at least 75% whiteness after 160°C for 10 minutes and marks the item PASS, but does not provide the measured batch value.

Plasticizer absorbency: The source requires a minimum 17% plasticizer absorbency and marks PASS, but does not provide a numerical batch result.

6. Potential Application Relevance

The supplied COA does not list specific end-use applications. The following table therefore presents general technical evaluation contexts for SG-3 PVC resin and should not be read as manufacturer-certified application recommendations.

7. Quality Control & Incoming Inspection Recommendations

8. Commercial & Technical Evaluation Summary

9. Source Conclusion

The original certificate states that the inspection result proves the production quality is in conformity with the superior-class request of the stated standards. Every listed row carries a PASS judgement.

10. Storage, Handling & Safety

The supplied one-page COA does not provide packaging, shelf life, storage or detailed safety instructions. Users should obtain the current supplier Safety Data Sheet and commercial product documentation before handling or purchasing the resin.

General powder-resin practice includes clean and dry storage, contamination prevention, control of unnecessary dust generation and maintenance of lot traceability. These are general technical considerations and are not source-stated SG-3 requirements.

11. Limitations of the Supplied Data

This source is a batch Certificate of Analysis rather than a comprehensive application TDS. It does not provide manufacturing-process details, polymerization method, complete particle-size distribution, fusion behavior, mechanical properties, processing recipes, packaging, shelf life or specific end-use recommendations.

The COA also omits numerical batch results for several items despite recording PASS. No values have been inferred for those rows. Final commercial qualification should use current supplier documentation and application-specific trials.

12. Conclusion

The supplied SG-3 certificate shows PASS status for every listed inspection item. Numerically reported results include viscosity number 128 ml/g, impurity particles 4/900 cm², apparent density 0.47 g/ml, 0.250 mm sieve residue 0.4%, grain count 5/400 cm², volatile matter/moisture 0.10% and residual vinyl chloride 1 mg/kg.

From an incoming-quality perspective, the reported batch results meet the source-listed criteria. For customer approval, the certificate should be supplemented with the current SG-3 TDS/SDS and trials in the intended PVC formulation and process, particularly for fusion, processability, thermal color, plasticizer interaction and finished-product properties.

Notes:
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