Introduction of PVC Color Change Film

In the realm of automotive personalization and decoration, color change film has emerged as a popular product in recent years, winning the hearts of car owners with its unique color expression, aesthetics, and trendy appeal. Below, we will delve into the structural composition and manufacturing processes of color change film, with a particular focus on PVC materials.

I. Structural Analysis of PVC Color Change Film

The core structure of PVC color change film is a multi-layer composite, primarily consisting of:

• PVC Base Film Layer: Serving as the main body of the film, it supports the color layer and other functional layers, with its physical properties directly influencing the durability and aging resistance of the film.

• Color Layer: Utilizing high-precision printing or blending techniques, pigments are uniformly distributed on the surface or within the PVC base film, creating a rich and varied color palette.

• Adhesive Layer: Employing high-performance pressure-sensitive adhesive, it ensures a tight bond to the vehicle's surface while maintaining excellent removability and leaving no adhesive residue.

• PET Protective Film/Backing Paper: Protects the film during manufacturing, transportation, and installation, ensuring cleanliness and flatness before removal for application.

II. Manufacturing Processes of PVC Color Change Film

PVC color change film manufacturing processes are primarily classified into two categories: cast and calendered, each with distinct raw material handling, molding methods, and resulting product properties.

1. Cast PVC Color Change Film

• Raw Material Preparation: Mixes liquid PVC resin, plasticizers, thermal stabilizers, and other additives to form a homogeneous, flowable liquid mixture.

• Molding Process: Injects the liquid mixture into a mold, where it undergoes heating to evaporate solvents and cure the resin, forming a solid film with uniform texture and consistent color. This process demands rigorous control over raw material purity and molding environment to ensure superior film performance and color stability.

2. Calendered PVC Color Change Film

• Raw Material Mixing: Blends PVC resin, additives, and other raw materials, heating them to a pliable state.

• Calendering: Uses multiple rollers to continuously press and stretch the softened resin, gradually reducing its thickness to the desired specification. This process, akin to rolling out dough in traditional pastry making, physically distributes and shapes the material.

• Trends in Optimization：Recently, to enhance the protective properties and overall quality of color change film, some manufacturers have begun using TPU (Thermoplastic Polyurethane) as the base film material. This combines the aesthetic benefits of color change film with TPU's weather resistance and scratch resistance, yielding a novel product that is both visually appealing and protective.

Conclusion

PVC color change film, with its diverse color options and relatively economical cost, holds a significant position in the automotive personalization market. The cast and calendered manufacturing processes each offer unique characteristics, catering to different car owners' needs for color accuracy, protective performance, and cost-effectiveness. Furthermore, the introduction of TPU-based materials signals a shift towards more premium, comprehensive performance in the color change film market.

We cordially invite partners interested in PVC and TPU automotive films to contact us, exploring new possibilities together.