MP-130L PVC Paste Resin with 1342 Polymerization Degree 2258 mPa.s Viscosity and 6% Thickening Rate

BOHUA MP-130L PVC Paste Resin - Batch Quality & Technical Report

1. Executive Summary

The supplied Product Inspection Report identifies the sample as PVC Paste Resin, Grade MP-130L (Application I), manufactured by Tianjin Bohua Chemical Development Co., Ltd. The batch number is 2645070, the sampling date is 20 February 2026, and the inspection date is 22 February 2026. The stated inspection basis is Q/12HG 7009-2025.

The batch is concluded as qualified. Reported results include average degree of polymerization 1342, standard paste viscosity (B type) 2258 mPa.s, impurity particles 4, volatile matter including water 0.31%, 24-hour paste thickening rate 6%, thermal whiteness 83%, scraper fineness 35 μm, residual vinyl chloride monomer 4 μg/g, and water-extract pH 5.6.

This report reorganizes the batch certificate into an English technical format and adds interpretation, quality-control guidance and application-evaluation considerations. Source-derived limits and measured results remain clearly separated from general technical guidance.

2. Product & Batch Identification

3. Batch Inspection Results

4. Test Condition Note

The source report states the following condition in the remarks section: DINP 60 parts; No. 4 spindle; 50 rpm; 30°C. This condition is particularly important when interpreting the reported standard paste viscosity. Direct comparison with other paste-resin grades should use harmonized plasticizer loading, spindle, rotational speed and temperature.

5. Compliance Margin Analysis

6. Technical Performance Interpretation

Polymerization degree: The measured average degree of polymerization of 1342 sits within the 1200-1400 requirement and provides a batch-specific resin identity/consistency reference.

Paste viscosity: The B-type paste viscosity of 2258 mPa.s is well below the 4000 mPa.s upper limit under the stated DINP 60 parts, No. 4 spindle, 50 rpm and 30°C condition. Finished-plastisol viscosity will still depend on the full formulation and mixing history.

Paste thickening stability: A 24-hour thickening rate of 6% is far below the maximum 100% limit, providing a favorable batch-specific indicator of viscosity stability under the supplier's test basis.

Particle cleanliness: Only 4 impurity particles are reported, while both sieve-residue results are below their maximum limits. Together with scraper fineness of 35 μm, these data support good batch cleanliness and coarse-particle control.

Volatile matter: The measured 0.31% is below the 0.40% maximum, providing a useful incoming-control indicator for moisture and volatile content.

Thermal whiteness: The batch achieved 83% after 160°C for 10 minutes, exceeding the 80% minimum. This is a defined thermal-color indicator rather than a complete long-term thermal-stability test.

Residual VCM: Residual vinyl chloride monomer is 4 μg/g against a maximum of 5 μg/g. Regulatory suitability of finished articles must still be evaluated for the intended market and end use.

Water-extract pH: The measured pH is 5.6 against the stated maximum of 9.0. Formulation compatibility should be confirmed in the actual plastisol system.

7. Potential Application Relevance

The source identifies MP-130L as PVC paste resin and marks it as 'Application I' but does not define the corresponding finished-product application in the supplied report. The following table therefore presents general paste-PVC evaluation contexts and is not a manufacturer-certified application list.

8. Formulation & Processing Considerations

Reproduce the supplier's viscosity test condition when comparing lots: DINP 60 parts, No. 4 spindle, 50 rpm and 30°C.

Establish initial, 24-hour and longer-term viscosity behavior in the customer's actual plasticizer and additive package.

Optimize mixing sequence, shear and deaeration to obtain reproducible plastisol behavior.

Determine gelation and fusion conditions experimentally because the inspection report does not provide gelation temperature, fusion time or rheological curves.

For appearance-critical products, combine impurity, sieve-residue, fineness and thermal-whiteness checks with final-surface inspection.

Use the current supplier SDS and application-specific technical documentation for safety and processing details not contained in this inspection report.

9. Quality Control & Incoming Inspection

10. Commercial & Technical Evaluation Summary

11. Storage, Handling & Safety

The supplied Product Inspection Report 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.

As general powder-resin practice, maintain clean and dry storage, keep packaging closed, prevent contamination, minimize unnecessary dust generation and preserve lot traceability. These are general technical considerations rather than source-stated MP-130L requirements.

12. Limitations of the Supplied Data

The source is a batch Product Inspection Report rather than a comprehensive application TDS. It does not define 'Application I', nor does it provide particle-size distribution, plasticizer absorption, gelation/fusion curves, mechanical properties, detailed processing recipes, packaging or shelf life.

No unsupported manufacturer specifications have been added. Final commercial approval should use the current supplier TDS, COA, SDS and application-specific technical documentation in addition to this batch report.

13. Conclusion

Batch 2645070 of MP-130L PVC Paste Resin is reported as qualified under Q/12HG 7009-2025. The batch shows an average degree of polymerization of 1342, B-type paste viscosity of 2258 mPa.s, 24-hour thickening rate of 6%, thermal whiteness of 83%, scraper fineness of 35 μm and residual VCM of 4 μg/g, with all listed results meeting the stated requirements.

For customer qualification, the resin should be evaluated in the actual plastisol formulation and production process, with emphasis on viscosity and aging, dispersion, gelation/fusion, surface appearance, thermal color stability and final-product performance.

Notes:
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