The Automotive Industry Uses PUR Adhesives

Since hot melt adhesive and moisture-reactive polyurethane (PUR) hot melt glue have strong bonding, flexibility, weather resistance, and permanent qualities, they are frequently used in automotive applications, including automobile bodywork. Applications include lights, automobile carpets, electronics, car filters, seats, and interior parts are among them.

Automotive Adhesives Sealants Market

In 2020, the value of the worldwide automotive adhesives and sealants market was valued to be USD 6,414.1 million. Adhesives have supplanted welding and fasteners as an essential technology in the automobile sector. A typical family vehicle uses more than 15 kg of glue. Adhesives are used to join composite materials, which take the place of metal parts to lighten vehicles and increase their fuel economy. In addition to helping vehicles save weight, adhesives are used by automakers to improve vehicle durability, dampen road and engine noise, and improve passenger safety and comfort.

Why Moisture-Reactive Polyurethane (PUR) Hot Melt Adhesive?

Components used in the automobile manufacturing sector must be developed and manufactured with adherence to strict specifications for quality, safety, repeatability, precision, and reliability. For this reason, when choosing an adhesive to attach parts together, automakers frequently choose reactive polyurethane hot melts (PUR). PUR has advantages such as impact resistance, excellent adhesive performance, high/low temperature resistance, superior solvent and chemical resistance, and thermoset polymer production. It is widely used in the bonding of seat and interior trim pieces, vehicle electronic components, and other materials and is excellent for bonding a variety of materials. Automobiles use a lot of hot melt adhesives because of their high adherence to leather, cloth, glass, and polymer-based surfaces.

Glues And Coatings Commonly Used In The Automotive Industry

1. Automotive Lamp Sealant

Because headlights work in harsh environments, their internal temperatures can rise to as high as 170°C when used for extended periods of time. In order to minimize fogging, headlamp adhesive must be stable at high temperatures and refrain from releasing organic gases. The adhesive should continue to function consistently against erosion and impacts even under unfavorable weather conditions, such as wind and rain. Additionally, it must withstand UV rays in order to avoid aging and cracking when exposed to sunlight for a lengthy amount of time.

PUR hot melt adhesive system or butyl rubber can be used to glue the automobile lamp. Fast curing and strong initial strength are two benefits of PUR hot melt glue that enable speedy bonding and sealing. This lowers expenses and facilitates automated production. Strong initial adhesion and quick curing are provided, enabling instant assembly without the need for long-term storage. When it interacts with the moisture in the air during storage and transit, it gains additional curing strength. In addition, it has strong resistance to aging, chemicals, and temperature changes.

2. UV Primer

Since headlights are such an important part of your automobile, protect them to extend their longevity. Usually, PC/ABS and BMC are used to make lamp holders. Plastic surfaces may have minute imperfections that cause sporadic reflections when vacuum coated, reducing their brightness. Apply UV primer to these flaws to create a smooth, light-reflective covering.

3. Hard Coat

PMMA or PC are the materials used in the manufacturing of car lampshades. Extended exposure to the elements might result in a white fog, cracking, powdering, and yellowing. In addition, the lights are readily damaged by impacts from sand and gravel, dust, oil residue, and insect remnants when traveling at high speeds. Adding a Hard Coat protective layer can help shield the lights from the weather and prolong their lifespan.

4. Automotive Interior

Base: PUR hot melt adhesive, hot melt adhesive

These days, car interiors composed of different materials including leather, synthetic leather, foam plastics, and sponges frequently employ hot melt adhesives like PUR. These adhesives aid in the bonding of various layers of automobile roofs, sun visors, trunk tire covers, dashboards, seats, pedals, and compartment walls in order to improve driving comfort.

PUR hot melt adhesive is a solid that does not release volatile chemicals, cures quickly through a moisture reaction, and has excellent adherence to a variety of surfaces. In addition to providing advantages over conventional hot melt adhesives, it complies with environmental regulations. By offering structural bonding and durability to both high and low temperatures, it improves the interiors of cars.

5. Bonding of Automotive Brand-Name and Logos

Base: PUR hot melt adhesive

Automaker used riveting methods for bonding in the past, which led to a lack of accuracy and good looks. PUR hot melt adhesives, which have a resilience to age and temperature, are increasingly used to fuse brand names and logos.

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