PVC Paste Resin

1. What is PVC paste resin?

PVC paste resin, with another name of PVC emulsion resin, is fine powder and immobility. Its preparing method is emulsion and micro-suspension method. Mix polyvinyl chloride paste resin with the plasticizer and then stir to form a stable suspension. And then the suspension will be made into PVC paste, or PVC plastisol, PVC sol. Paste PVC is named after its highly dispersible powder used for paste processing. Because of its excellent paste-forming properties and good dispersion properties, it is mainly used in the field of soft materials of PVC resin.

2. What are the core differences between PVC paste resin and PVC suspension resin?

The biggest differences between PVC paste resin and PVC suspension resin lie in their particle morphology, processing methods, and application scenarios.

PVC paste resin is an ultrafine powder that can be mixed with plasticizers to form a paste-like slurry, suitable for flexible low-temperature molding processes such as coating, impregnation, and slush molding. It is mainly used to produce soft products.

PVC suspension resin has coarse particles and no gelatinization ability, requiring extrusion, injection molding, and calendering processing. It is mostly used for rigid plastic products such as pipes, profiles, and rigid sheets.

3. How does the viscosity of PVC paste resin affect product production?

Paste viscosity is a core processing indicator.

Low-viscosity paste resin has a high plasticizer tolerance and good flowability, suitable for impregnation and slush molding processes. The PVC paste resin with low viscosity can produce thin products with uniform thickness, such as medical gloves and slush toys.

High-viscosity paste resin slurry has strong stability and is not prone to sagging, suitable for thick coating and scraping processes. It is mostly used for artificial leather, waterproof membranes, and thick-coated products.

4. How To Use PVC Paste Resin?

Polyvinyl chloride paste resin has fine particle size and immobility. So it is usually mixed with the plasticizer, such as DOP plasticizer, to form a stable suspension after stirring. Then the PVC plastisol or PVC sol produced can be directly used to process into final products. In the process of paste making, add various fillers, diluents, heat stabilizers, foaming agents and light stabilizers according to the needs of different products.

5. Can PVC paste resin be used to make foamed products?

Yes. PVC paste resin is the core raw material for PVC foamed floor mats, cushioning materials, and the foam layer of artificial leather. The production of foamed products requires the use of foaming agents, foaming regulators, and foam stabilizers. Simultaneously, optimizing the plasticizer ratio and controlling the gel temperature and curing speed allows for precise control of the foaming ratio, resulting in lightweight foamed products with excellent cushioning and sound insulation.

6. Are PVC paste resin products environmentally friendly?

Currently, PVC paste resin formulations have achieved phthalate-free and low-VOC results. However, the safety of the products mainly depends on the additives (inferior, low-end additives) may contain phthalate plasticizers and toxic stabilizers, posing safety hazards. Medical-grade and food-grade products use environmentally friendly additives that are non-toxic and harmless, meeting public and medical safety standards and suitable for close-fitting, human-contact applications.

7. What are the temperature and acid/alkali resistance properties of PVC paste resin products?

The temperature resistance range of conventional PVC paste resin products is -20℃ to 60℃. They are prone to softening and deformation at high temperatures, hardening and brittleness at low temperatures. It possesses excellent resistance to weak acids and alkalis at room temperature and is not easily corroded. But it is not resistant to strong acids, strong alkalis, or immersion in organic solvents. Therefore, it is not suitable for high-temperature working conditions or highly corrosive chemical environments, and is only suitable for decoration, labor protection, civil, and general industrial applications in normal temperature and typical dry or wet environments.

8. What are the main factors affecting the of PVC paste resin price?

Upstream prices of vinyl chloride monomer (VCM), electricity, and chemical auxiliaries directly determine production costs.

Downstream demand fluctuations in the artificial leather, medical consumables, building materials, and automotive industries.

Industry operating rates, environmental protection production restrictions, and changes in import and export supply and demand.