Infrared Heating Activates The Glue, Enabling Fast Adhesion.

In the leather covering production of automotive interior parts and high-end door panel armrests, infrared heating lamps can rapidly activate the adhesive layer. They require no preheating and deliver instant temperature rise, enabling the adhesive to be reactivated and bonded firmly within an extremely short time. The radiative heating method of infrared precisely penetrates the surface layers, activating the adhesive molecules in just 3–10 seconds to restore tackiness. This process does not rely on slow heat conduction but instead uses infrared radiation to act directly on the adhesive layer, achieving high thermal efficiency with minimal energy waste. Subsequently, the leather is pressed onto the armrest substrate, and the entire lamination cycle is completed in mere tens of seconds, significantly shortening production lead times. Compared to traditional contact heating methods such as hot air or rollers, infrared heating eliminates waiting time and removes thermal lag effects, greatly boosting line throughput. At the same time, since radiation heating does not contact the leather surface, it avoids risks of indentations or scorching, ensuring excellent surface quality. This characteristic of "second-level activation and immediate bonding" not only simplifies process control but also markedly increases output per unit time, making it an ideal technical choice for achieving efficient, clean production of high-value-added interior components.

Genuine leather is more temperature-sensitive, requiring lower temperatures and slower heating rates, while synthetic leather can withstand higher temperatures but must avoid melting. Therefore, during the wrinkle-removal process, infrared heating parameters (e.g., wavelength, temperature, duration) must be adjusted based on the material type.

Technical Principles

1. Wavelength Matching

Genuine Leather (Natural Fibers):
Use medium-wave infrared (2–4 μm) for gradual heating to avoid protein denaturation and shrinkage caused by high temperatures.

Synthetic Leather (Polymer Materials):
Apply fast medium-wave infrared (1.4–2 μm) for rapid penetration, softening the PVC/PU layer while preventing surface melting.

2. Temperature Control

Genuine Leather: Maintain temperatures at 60–80°C.

Synthetic Leather: Operate at 80–120°C.

A PID temperature control system dynamically adjusts heating to prevent thermal damage.

3. Uniformity Design

Utilize a multi-zone independently controlled infrared tube matrix combined with gold-reflective-coated heating tubes to enhance radiation uniformity, ensuring temperature variations ≤5°C across the material.

4. Heating Time Optimization

Genuine Leather: Slow heating over 1–3 minutes to prevent localized overheating.

Synthetic Leather: Short, efficient cycles of 30–60 seconds to avoid insufficient softening.

Medium wave quartz infrared heater lamp are particularly suitable for the fast heating of surface or thin materials, and the range of IR radiation wave is 2.2-4.0μm. Plastic, water and other solvents absorb well this medium wave radiation. Because of its long working life and economical efficiency, medium wave infrared quartz heater lamps are popular used in continuous heating processes and long heating machine or drying oven.

Twin tube fast response medium wave infrared heating lamp can be controlled and adjusted the output power by PLC or SCR regulator automatically, so we can have accurate（±1 ℃）IR heating temperature in industry process. The heating filaments can be desinged and work in 1200～1800℃ with 1~2 seconds fast response time, so the FMW IR lamp are widely used for fast heating application which needs heating temperature from 50～500℃.

Because of needing small installation space and flexible working position, our infrared quartz heating lamps are popular for industrial customers to repalce air heating and other high energy consumption electric heating elements, or customers prefer a combination heating solutions which includes circle hot air heating with fast efficient IR heatings.