Thermo PU leather (also known as heat-reactive or thermo reactive polyurethane synthetic leather, heat-stamping color-change PU, or color change PU leather) is a premium synthetic leather material featuring heat-induced color change. It is widely used in high-end packaging, notebook covers, menu covers, bookbinding, gift boxes, and related applications.

I. Key Features

· Heat-Stamping Color Change:​ When heat-pressed at 160–180°C, the pressed areas undergo a permanent darkening effect (e.g., red to deep red, green to dark green), creating a high-contrast, embossed look similar to genuine leather branding.

· Soft Touch:​ Combines the hand-feel of natural leather with the consistency and stability of synthetic materials. Offers excellent fold resistance, abrasion resistance, and anti-mildew properties.

· Eco-Compliance:​ Mainstream products comply with international environmental standards including REACH, RoHS, and CA Prop 65 etc. Some carry Vegan certification and contain no animal-derived ingredients.

II.  Applications

III. Processing Guidelines

· Heat-Pressing Temperature:​ Typically 160–180°C. Lighter-colored materials may require higher temperatures. Black and white variants show minimal color-change effect.

· Pressure Control:​ Insufficient pressure results in poor contrast and lack of depth; excessive pressure may cause edge scorching or base texture bleed-through.

· Stamping Die Material:​ Copper dies are recommended for more stable heat conduction; zinc dies are also usable but yield slightly inferior results.

IV. Technical Specifications

The core value of Thermo PU lies in its ability to display brand logos or patterns through heat pressing without the need for printing, delivering a superior visual finish. It is ideal for products that demand high-level aesthetic customization.