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February 22, 2018 - Automotive

Automotive Headliner Assembly Considerations

According to PR Newswire, the global automotive headliner market is forecast to grow at a CAGR of 3.27% now through 2022. As car interior technologies continue to advance, the headliner is no exception.

Initially, headliners simply covered a vehicle’s roof structure for aesthetic purposes. Now, they enhance both passenger safety and comfort offering many innovative features, such as:

  • Safety crush panels
  • Interactive multimedia
  • Overhead consoles
  • Expansive sun roofs

However, in order to accommodate these innovations, the headliner assembly process has had to change.

Take a look at headliner assembly changes and what they mean for adhesives.

  1. Temperature Resistance

With increasingly larger sun roofs, more UV light enters car interiors than in the past. This creates a greenhouse effect, causing car interior temperatures to rise.

This aspect, combined with new headliner substrate materials, are why products must offer higher temperature resistance.

What This Means for Adhesives

Given the exposure to higher temperatures, it’s a good idea to ensure that the chosen adhesive can maintain performance even in temperatures up to 100°C. If the chosen adhesive is unable to resist high temperatures, adhesive failure is likely to occur.

  1. Load Strength

Headliners are now comprised of more parts, making it important to understand the amount of weight each component contributes to the overall headliner.

What This Means for Adhesives

Not all adhesives offer the same amount of load strength. For example, a certain adhesive may not be sufficient for a heavier component if it cannot withstand its weight. Therefore, it’s important to understand:

  • The required load strength
  • Your headliner assembly processes, i.e., if you’re aiming to simplify your process with one adhesive or looking for the most cost-effective process, which may require the use of more than one adhesive

automotive headliner

  1. Substrate Chemistries

Additionally, there are now many substrate chemistries in manufacturing headliners, including:

  • Steel
  • ABS reinforcement brackets
  • ABS trim rings
  • PP safety plastic
  • Clips
  • Wire harnesses

What This Means for Adhesives

As a result, these substrate chemistries may require a different chemistry of adhesive, especially under high heat/load situations.

It’s also important to understand the needed adhesive performance criteria and how the new substrate chemistries can impact it. Typically, a headliner adhesive should:

  • “Machine” well, offering clean cut-off and no-stringers
  • Be easy to process and has a good melt rate
  • Offer extended pot life to reduce char
  • Be easy on the dispensing equipment

Bostik understands these changes and their impact on adhesives. In addition to smart products, Bostik offers the experience and technical expertise needed to provide customers with the right headliner adhesive for their needs. For more information on these solutions, visit www.bostik.com.

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