In today’s home décor and building materials industry—where quality and performance are equally valued—brands seeking to stand out in a competitive market must rely not only on design, but also on the reliability and long-term stability of the materials themselves. With rapidly evolving visual trends, growing consumer demand for durability and environmental responsibility, and manufacturers’ needs for higher production efficiency, the industry is asking a critical question:
Where does the adhesion strength of PVC Decorative Film truly come from?
Why do some films remain secure and intact for ten years, while others begin peeling within one year?
With this industry-wide concern in mind, we enter the HANTAI technical laboratory to explore—what problems do Corona Treatment and Back Primer technology actually solve in PVC Decorative Film? And how do they influence stability, durability, and final performance?
Can Adhesion Be Improved Through Surface Structure?｜Why Corona Treatment Matters
In PVC Decorative Film manufacturing, enhancing surface bondability is a fundamental and essential process. Many manufacturers still rely on Corona Treatment as the primary method because it modifies the material’s surface structure.
Corona Treatment is essentially a physical surface modification technique that:
Applies high-voltage discharge to the surface of PVC Decorative Film
Creates micro-roughness on the smooth surface
Increases surface tension to improve bonding with adhesives
Its advantages are clear: fast, low cost, and suitable for mass production.
However, the industry is also fully aware of its limitations:
👉 Corona Treatment deteriorates over time.
This means that if PVC film is stored too long or exposed to unstable environments, the enhanced adhesion will gradually diminish. Therefore, for high-end customers, overseas engineering projects, or long-term storage needs, Corona Treatment is no longer considered the only reliable method—only an auxiliary one.
Why Must High-Quality PVC Decorative Film Include Back Primer?｜What Does Primer Actually Change?
To ensure consistently strong adhesion under any condition, the industry has shifted toward a more stable and professional solution:
Back Primer Technology.
Unlike Corona Treatment, Back Primer is a chemical-level modification.
The primer layer is a specialized resin applied to the back of PVC Decorative Film. When combined with adhesive, it forms a chemical bond, not just physical adhesion. This allows the film to firmly attach to various substrates—from MDF and plywood to metal panels and PVC foam boards.
Key advantages of Back Primer include:
Long-term stability — unaffected by storage time
Strong bonding — reliable even in heat, humidity, or temperature cycling
Wide compatibility — works with various adhesives and base materials
Engineering-grade performance — suitable for high-end furniture, luxury panels, and vehicle interiors
At HANTAI, standards are even stricter:
While many companies consider 36 dyne acceptable, HANTAI requires ≥38 dyne.
In testing, our PVC Decorative Film often reaches up to 60 dyne, far exceeding industry norms.
How Is Adhesion Tested?｜Inside HANTAI’s Laboratory
To scientifically verify adhesion strength, HANTAI strictly follows National Standard GB/T 14216-2008, using dyne test pens of different levels.
Testing steps include:
Applying a specific dyne-level test fluid to the primer surface
Observing whether the fluid forms a uniform film
If the fluid spreads evenly without shrinking, cracking, or beading, the film meets the corresponding dyne value
For example, if 38 dynes spreads evenly, the primer reaches at least 38 dynes. Higher-level pens (40, 42, 50, 60) further determine the actual upper limit.
Our films consistently reach values far above industry standards, ensuring:
Stability during long-term use
Reliability under complex construction conditions
Resistance to storage, transport, and environmental changes
What Real Value Does High Adhesion Provide?｜A Full Upgrade from Stability to Appearance
Strong, stable adhesion in PVC Decorative Film greatly enhances real-world performance:
Easier installation
Primer bonding reduces bubbles and shifting, improving efficiency.No peeling over time
Stable even in high heat, humidity, or temperature fluctuations.Higher product competitiveness
Lower after-sales issues, improved user satisfaction and brand reputation.More professional and premium appearance
Strong adhesion ensures long-lasting beauty and clean surface effects.
This is why more international clients choose HANTAI PVC Decorative Film—
not only for texture and visual appearance, but for technical reliability and long-term stability.
How Does HANTAI Ensure PVC Decorative Film Quality Remains Consistently High?
As a National High-Tech Enterprise in the decorative materials industry, HANTAI maintains rigorous standards at every stage—R&D, production, and quality control:
Independent R&D team improving primer formulas and corona technology
Laboratory tests exceeding national standards
Advanced international coating equipment and precision testing tools
Batch-by-batch inspection of dyne values, adhesion strength, and corona levels
Our PVC Decorative Films are widely used in furniture, doors, cabinets, wall panels, and decorative boards, and exported to Europe, Southeast Asia, and the Middle East—earning long-term trust worldwide.
Where Is PVC Decorative Film Heading?｜Primer Technology & Structural Innovation Lead the Future
As customer expectations rise, a clear industry shift is taking place:
Corona Treatment alone is no longer sufficient
Back Primer will become the standard for high-end PVC Decorative Film
Demand for eco-friendly alternatives and durable materials will grow
More innovative resins, modifiers, and composite structures will emerge
Visual effects (metallic, matte, soft-touch, micro-glitter) will integrate with structural performance
HANTAI is accelerating innovation in Back Primer technology, improving dyne levels, and developing films for more industries—promoting the evolution of the entire decorative materials sector.
Choosing Reliable PVC Decorative Film Begins with Choosing a Professional Manufacturer
A truly high-quality PVC Decorative Film is not just about appearance—
it determines whether the final product is durable and long-lasting.
Through this article, HANTAI hopes to help more industry clients understand the importance of Corona Treatment and Back Primer, enabling more professional material selection.
We will continue sharing knowledge on:
Surface treatment technologies
Material structure innovation
Adhesive compatibility research
Engineering application cases
New decorative trends
Want to Learn More About PVC Decorative Film? Explore Our Products and Technical Services
If you are looking for:
More stable adhesion
More reliable primer technology
Higher standards in PVC Decorative Film
Engineering-grade and high-end furniture-grade materials
HANTAI can provide:
✨ Free Samples
✨ Technical Support
✨ Material Selection Guidance
✨ Product Data & Test Reports
We look forward to working with you to create better decorative material solutions.
