How to Solve the Problem of Greasy Surfaces on PVC Coated Fabrics?

Causes of Greasy Surfaces on PVC Coated Fabrics

PVC (polyvinyl chloride) coated fabrics require the addition of a large amount of plasticizers (such as phthalates) during the manufacturing process to enhance flexibility. However, after high-temperature processing or prolonged use, plasticizers easily migrate to the coating surface, forming an oily film.

Methods to Solve the Greasy Surface Problem of PVC Coated Fabrics

1. Optimizing Surface Treatment Agent Formulation

By adding functional additives, the migration of plasticizers can be blocked and surface performance improved:

Cellulose and wax emulsion compounding: Adding 1.5%-2.5% cellulose (to enhance leveling) and wax emulsion hand feel agent (to improve slipperiness) to the treatment agent can significantly reduce the greasy feeling.

Antioxidant application: Such as BASF UV absorber (0.4%-0.6%), which inhibits material aging and extends the anti-fouling cycle.

2. Using Water-Based Environmentally Friendly Treatment Agents Instead of Oil-Based Formulas

Traditional solvent-based treatment agents (containing toluene and methyl ethyl ketone) not only pollute the environment but also exacerbate the greasy problem. Water-based treatment agents can solve this problem:

3. Composite Oil-Resistant Coating Technology

Improving oil resistance through multi-layer structure design:

Substrate pretreatment: Plasma activation of polyester filaments (surface energy > 45 mN/m) to enhance coating adhesion.

Reinforcement of stitching holes: Embedding micropores with a diameter of 0.3-0.8 mm in the coating, using the mechanical interlocking effect to increase the peel strength to 2.3 times that of traditional processes.

4. Regular Cleaning and Maintenance

For fabrics that have already become greasy, the use of a special cleaning agent is recommended:

Emulsifying cleaning agent: Such as JC-020 plastic oil stain emulsifier, which can decompose stubborn oil stains without damaging the PVC substrate.

Operation suggestions: Dilute 10-25 times and soak for 3-8 minutes; ultrasonic cleaning provides better results. 

Conclusion

The oily surface problem of PVC-coated fabrics can be solved through a three-pronged approach: formula optimization, process improvement, and structural innovation. With increasingly stringent environmental regulations, water-based treatment agents and oil-resistant composite technologies will become mainstream.