Emulsion Polyvinyl Chloride (E-PVC): Properties and Supply

Emulsion Polyvinyl Chloride as an Industrial Raw Material Category

Emulsion polyvinyl chloride (E-PVC) is a thermoplastic vinyl chloride polymer produced by emulsion polymerisation. Unlike suspension PVC (S-PVC), the emulsion method yields ultra-fine spherical particles with a size of 0.1 to 2 microns, which form stable dispersions in plasticisers. This ability to form pastes and organosols makes E-PVC indispensable for the production of artificial leather, stretch ceilings, linoleum, automotive coatings and various protective materials. The specificity of the category is determined by the fact that E-PVC is processed not through a melt but through an intermediate paste (plastisol) stage, which is applied to a substrate or mould and then cured by heating. This technology allows producing thin, flexible and simultaneously strong coatings of complex configuration. The emulsion method accounts for about 10 to 15 percent of global PVC production, but in the paste-grade resin segment it remains dominant.

Chemical Identification and Classification of Grades

E-PVC is identified by CAS number 9002-86-2. In international trade, HS code 3904.10 is used for polyvinyl chloride in primary forms. True density of the polymer is 1.35 to 1.43 g/cm3. Bulk density of emulsion grades is lower than that of suspension grades and is usually in the range of 0.25 to 0.55 g/cm3, which is due to the high porosity of particles and their ability to absorb plasticiser. In Russian practice, E-PVC grades are regulated by GOST 14039-78. Depending on the purpose and properties, several groups are distinguished. Paste-forming grades such as PVC-E-6602-S and PVC-E-7002-S are intended for the production of plastisols and organosols. Grades for artificial leather, such as PVC-E-6250-Zh and PVC-E-6650-M, possess special properties for coating application. Chinese producers often use designations where the number corresponds to the K-value, such as SG-3, SG-5 or SG-8. The largest global suppliers of paste-grade E-PVC are companies from China, Europe and South Korea.

Regulatory Framework and Quality Standards

Circulation of E-PVC and articles made from it in Russia and the EAEU is regulated by Customs Union technical regulations, in particular TR CU 005/2011 for packaging, TR CU 007/2011 and TR CU 017/2011 for products in contact with children and skin, TR CU 021/2011 for food contact. For emulsion polyvinyl chloride itself, GOST 14039-78 applies, establishing technical requirements, acceptance rules and test methods. Residual vinyl chloride monomer (VCM) content in E-PVC, as in S-PVC, is strictly regulated: for food and medical grades it must not exceed 1 ppm. International standards used for identification and control include ISO 1628-2 for K-value determination, ISO 60 for bulk density, ISO 4610 for particle size distribution, ASTM D1243 for viscosity, ASTM D1895 for bulk density, ASTM D1921 for particle size.

Physico-Chemical Properties and Paste-Forming Ability

Key physico-chemical parameters of E-PVC determine its behaviour in paste preparation and coating operation. The K-value characterises molecular weight: for paste-forming grades the optimum is K 65 to 72. The higher the K-value, the higher the paste viscosity, strength and crack resistance, but the lower the flowability and the ability to gel quickly. Paste viscosity is a critical parameter. For E-PVC it is usually in the range of 3.6 to 7.5 Pa·s at a shear rate of 50 s-1 depending on the grade and plasticiser content. The swelling index is 1 to 4, reflecting the ability of the resin to absorb plasticiser and affect paste shelf life. Thermal stability at 180 degrees Celsius must be at least 10 minutes, which is important for the gelation process. Moisture and volatile content must not exceed 0.3 percent, and extractable matter content is 3 to 4 percent. Chemical resistance of E-PVC is similar to other PVC types: it is resistant to water, acids and alkalis, but has limited resistance to organic solvents.

Mechanism of Action and Functional Role

In processing, E-PVC acts as a dispersed phase that forms a paste (plastisol) when mixed with plasticisers. On heating to 160 to 200 degrees Celsius, the resin particles swell, the plasticiser penetrates the polymer matrix, and gelation occurs — the paste turns into a monolithic elastic material. This process is called gelation or plastisol fusion. The functional role of E-PVC is determined by its ability to create coatings with specified properties: softness, elasticity, cold resistance, wear resistance and appearance. In compounds, E-PVC acts as a carrier for additives: plasticisers (DOP, DBP) impart elasticity, heat stabilisers prevent dehydrochlorination, fillers (chalk, kaolin) reduce cost and regulate viscosity, pigments provide colour. For foamed coatings, blowing agents are introduced that decompose on heating and create a cellular structure.

Processing Technology and Resin Requirements

E-PVC processing includes plastisol preparation, application to a substrate or mould, gelation and cooling. Plastisol is prepared by mixing the resin with plasticisers, stabilisers, fillers and pigments at a temperature not exceeding 40 degrees Celsius to avoid premature swelling. The paste is then applied by casting, dipping, screen printing or spraying and cured in an oven at 160 to 200 degrees Celsius. E-PVC is subject to high requirements for particle size distribution (uniformity of particles), porosity, residual monomer content and moisture. Moisture content must not exceed 0.3 percent, since moisture causes bubbles and coating defects. Stability of paste viscosity over time is also important: plastisols based on emulsion PVC have a shelf life of no more than 6 to 8 weeks, after which viscosity may increase due to particle swelling.

Applications by Industry

Artificial leather and automotive coatings remain the largest consumer of E-PVC. The material is used for interior upholstery, instrument panels, armrests and decorative elements, where elasticity, wear resistance and a pleasant tactile texture are important. In construction, E-PVC is used for stretch ceilings, linoleum, wall coverings and vinyl wallpaper, providing durability and wide design possibilities. Packaging uses E-PVC for caps, seals and protective coatings. Medicine uses special grades for gloves, tubing and containers, where low VCM content and biocompatibility are required. The footwear industry uses plastisols for coating soles and shoe parts. Consumer goods include toys, sports mats, rugs and various protective coatings. In electrical engineering, E-PVC is used for cable insulation and sheaths, where dielectric properties are important.

Comparison with Alternative Materials

Compared to suspension PVC (S-PVC), emulsion PVC has finer particles and is capable of forming stable pastes, making it indispensable for coatings and artificial leather. S-PVC is used for rigid articles where paste formation is not required. Compared to polyurethane coatings, E-PVC is cheaper and easier to process but inferior in wear resistance and elasticity at low temperatures. Polyurethane is preferred for critical applications, E-PVC for mass solutions. Compared to rubber coatings, E-PVC has better chemical resistance and broader decorating possibilities, but inferior cold resistance. Rubber is used for special conditions, E-PVC for everyday tasks.

Common Processing Challenges

The most frequent problems in E-PVC processing are:

• Insufficient dispersion. Uneven distribution of additives leads to uneven gelation and coating defects.
• Incorrect temperature regime. Insufficient temperature causes under-gel (tackiness, low strength); excessive temperature causes thermal degradation and darkening.
• Excess moisture in the resin. Moisture causes bubbles and pores in the coating. The resin must be stored in dry conditions and checked for moisture.
• Unstable paste viscosity. Changes in viscosity over time can lead to uneven application and defects.
• Incompatibility of plasticisers. Incorrect selection of plasticiser can cause migration, exudation and deterioration of properties.

Quality Control and Laboratory Methods

Quality control of E-PVC includes incoming resin analysis, document verification and laboratory testing. Key parameters: K-value (ISO 1628-2), bulk density (ISO 60), particle size distribution (ISO 4610), paste viscosity (GOST 25276-82), swelling index, thermal stability (GOST 14041-68), moisture and volatile content, residual VCM content, ash content. For finished coatings, tensile strength, elongation at break, wear resistance, cold resistance, adhesion to the substrate and appearance are controlled. For food and medical grades, sanitary-chemical and toxicological tests are carried out. Laboratory confirmation is especially important for E-PVC, since paste or gelation defects appear only after application and heat treatment.

Storage and Transportation Conditions

E-PVC is stored in dry rooms protected from direct sunlight at temperatures not exceeding 30 degrees Celsius. The resin is moderately hygroscopic, so long-term storage requires protection from moisture. Bags and big bags must be sealed and protected from contamination. Shelf life in original packaging is usually 12 months. Transportation is carried out in 25 kg bags, 500 to 1000 kg big bags and octabins. For export supplies, sea and rail routes are used with protection from moisture and contamination.

Analogue Selection and Interchangeability

E-PVC analogue selection is one of the key services of the portal. We help replace imported grades with comparable alternatives based on K-value, paste viscosity, granulometry and swelling index. The algorithm includes analysis of the current grade and its technological parameters, determination of permissible deviations in key parameters, selection of options from available sources (Russia, China, other regions), verification of certificates and laboratory data, and organisation of trial batches for testing on the customer equipment. When selecting an analogue, not only K-value and paste viscosity but also swelling index, thermal stability, VCM content and food-contact compliance are considered. Replacement may require adjustment of the plastisol formulation and gelation temperature profile.

Supply Scheme: Worldwide

The portal organises E-PVC supplies worldwide. In the Russian market, emulsion PVC is represented by a limited number of producers, but China remains the main supplier of paste-grade resins. Russian producers such as Rusvinyl and BSK are increasing output, but a significant part of demand is covered by imports. Each supply is treated as a separate project with an individual scheme covering grade selection, quality verification, logistics and customs clearance.

Logistics and Customs Clearance

E-PVC logistics includes sea, rail and road routes. For large batches of powder, container transport is optimal. Customs clearance is supported by the portal broker: document preparation, HS code 3904.10 classification, certification and interaction with control authorities. The logistics scheme is built for the specific route and customer requirements, taking into account timing, cost and cargo safety.

FAQ

How does E-PVC differ from S-PVC?

E-PVC is produced by the emulsion method and has finer particles (0.1-2 microns), which allows forming stable pastes and plastisols. S-PVC has larger particles (100-200 microns) and is used for rigid articles. E-PVC is used for coatings and artificial leather, S-PVC for pipes and profiles.

Which E-PVC grade is suitable for plastisol?

For plastisol, paste-forming grades with K 65-72 are usually used, such as PVC-E-6602-S or PVC-E-7002-S. They provide stable paste viscosity and good gelation.

Why does E-PVC require plasticisers?

E-PVC is rigid and brittle by itself. Plasticisers penetrate the polymer matrix on heating and impart elasticity, cold resistance and mouldability to the material.

What documents accompany a supply?

Conformity certificates, quality certificates, sanitary documents for food contact, test reports, origin documents. For export batches, documents confirming compliance with the importing country requirements.

Are small batches available for testing?

Yes, trial batches from 25 kg are available for most grades. Terms are agreed individually.

Conclusion

Emulsion polyvinyl chloride remains a key polymer for the production of plastisols, artificial leather and protective coatings due to its ability to form stable pastes and create elastic, wear-resistant materials. A processor success depends on the correct choice of grade considering K-value, paste viscosity and swelling index, confirmed quality and stable supply. The portal helps select analogues, organise logistics and customs clearance, ensuring supply chain transparency worldwide.

Contact Us

If you are looking for E-PVC resin or need advice on grade selection, analogue search and worldwide supply organisation, please contact our team at info@apptrade.ru. We will help you find the right product, verify documentation and organise supply.