Thermal Transfer Canvas vs UV Flexible Film: Waterproof and Stain Retention Comprehensive Comparison + Lightbox Fabric Selection Guide

In outdoor advertising, light box display and large-scale event layout, waterproof and stain resistance are the core considerations in choosing advertising materials. As two commonly used materials, heat transfer canvas and VSUV soft film have their own advantages and limitations. In this article, we will compare the performance of the two materials through experimental data and actual cases, and recommend the applicable scenarios to help you choose the material accurately!

I. Waterproof comparison: who is more resistant to rain and humidity?

1. Waterproof performance of thermal transfer canvas

Material Characteristics:

Thermal transfer canvas is made of high-density polyester fiber, and the surface is covered with waterproof coating (commonly PVC or PU) through thermal transfer technology.

Waterproof test results:

Short-term waterproof: it can withstand moderate to light rain for 2-3 hours, water droplets form roll off on the surface without penetration.

Long-term immersion: after more than 6 hours, seams are prone to seepage due to aging of glue.

Weakness: Repeated folding or rubbing may cause the coating to fall off and reduce the waterproofness.

2. Waterproof performance of UV soft film

Material properties:

UV soft film adopts multi-layer composite structure (polyester fiber + UV curing coating + nano waterproof membrane), designed for outdoor high humidity environment.

Waterproof test results:

Extreme waterproof: can withstand heavy rainfall for more than 48 hours, the seams use high-frequency welding technology, no risk of leakage.

Weather resistance: -30°C to 80°C temperature difference, the stability of the waterproof layer remains unchanged.

Advantage: UV resistant, not easy to yellow and brittle for long-term outdoor use.

Conclusion:

✅ For short-term waterproofing needs (e.g. temporary events) go for heat transfer canvas (low cost);

✅ Long-term outdoor use (such as building hoardings, light box advertising) must choose UV soft film.

Second, stain retention comparison: who is easier to clean?

1. Stain resistance of heat transfer canvas

Surface characteristics: matte texture, easy to adsorb dust and oil stains.

Cleaning test:

Ordinary stains (e.g. mud): water can be removed by wiping, but repeated scrubbing may lead to abrasion of the coating.

Oily stains (e.g. motor oil): special cleaner is required, may leave light marks.

Disadvantages: pigment permeability is strong, dark stains are easy to penetrate into the fiber.

2. Anti-fouling design of UV soft film

Surface characteristics: smooth high gloss surface with added stain resistant coating (e.g. Teflon).

Cleaning test:

Ink/pigment: one wipe with a damp cloth, no residue.

Stubborn stains (e.g. adhesive prints): alcohol or neutral cleaner removes easily without leaving scratches.

Advantage: anti-graffiti design, suitable for high-traffic areas (e.g. subway advertising).

Conclusion:

✅ Low-pollution environments (e.g. indoor display boards) can be used with heat transfer canvas;

✅ High-pollution scenarios (e.g. restaurant light box, transportation hub advertising) preferred UV soft film.

Third, the comprehensive selection of material recommendations

V. Industry Trend: Combination of environmental protection and high performance

With the implementation of the EU REACH regulation, environmentally friendly UV flexible film (no plasticizers, recyclable) is becoming mainstream. It is recommended to prioritize the selection of products certified by Oeko-Tex or Greenguard, taking into account the performance and sustainability.