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News and Insight

Our blog keeps you in touch with the latest innovations and trends.



Klebelösungen aller Arten, darunter auch thermoplastische Klebstoffe, sind heute aus der Automobilindustrie nicht mehr wegzudenken. Gerade im Bereich des Fahrzeuginnenraums oder der Innenverkleidung kommen sogenannte Hotmelt Adhesives in Form von Klebefolien, Klebewebs oder verschiedenen Netzstrukturen häufig zum Einsatz und helfen, die Verklebung von einzelnen Materialien und die Verarbeitungsschritte zu vereinfachen.

Thermoplastic-adhesive-Automotive-door-panel-molding-processFür die automobile Anwendung müssen Hotmelt Klebstoffe verschiedenste technische, mechanische und physikalische Anforderungen erfüllen, darunter beispielsweise Beständigkeit gegen Verschleiß, Chemikalien oder Temperaturschwankungen. Darüber hinaus werden intelligente Klebelösungen auch für die Kaschierung von Textilien, Schäumen, Leder, Kunstleder oder anderen Materialien für die Fahrzeuginnenausstattung verwendet. Diese Verbundteile werden dann in Autositzen, Kopfstützen, Armlehnen, Türverkleidungen oder dem Dachhimmel eingesetzt. Klebevliese und Klebebänder werden zusätzlich auch bei der thermischen Dämmung, Schalldämmung oder der Isolation als Klebemittel zwischen den verschiedenen Dämmmaterialien verwendet.



Web adhesive?

A hotmelt adhesive web is a nonwoven fabric with bonding capabilities. It is produced on a roll with a certain width and roll length. It can be applied through a lamination machine with a continuous process. Web rolls could also be cut into a specific form for piece-to-piece lamination. It exists different weight options depending on bonding requirements.

Polyamide hot-melt material and melting point options?

Polyamide adhesive is sometimes referred to as PA adhesive. Depending on polymer structure, it can either be thermoplastic or thermoset. In the case of hot melt adhesive, it belongs to the thermoplastic family. PA hot-melt web is made from Polyamide material. When the material gets heated, it could be activated starting to have an adhesion characteristic. When the temperature goes down, the material will become solid again. From low melt to high melt product range, it varies from 90 to 200 degrees.


In our daily lives, we see textiles everywhere. In various industries, textiles are the foundation for many applications. The textile industry is also likely to innovate more quickly than other industries due to its strong compatibility. Joining materials, such as adhesive, allows combining of various substrates together, adding extra value and functionality.

Apart from that, lamination technology provides a wide range of possibilities. Innovative adhesive web even takes laminating process to the next level due to its clean and made-on roll feature compared to traditional liquid or water-based glue. It allows a continuous lamination process with higher efficiency.


What is a thermoplastic adhesive web?

A thermoplastic adhesive web is a solid material with a nonwoven structure, it’s also called a hot melt adhesive web. When we put it on hand, it feels like fabric. Depending on the machine setting, it exists in different weights and structures.

How is hotmelt adhesive web made?

A perfect adhesive web is formed from a fine fiber that is cooled down into a continuous nonwoven structure. Due to its special structure, it makes the final material very soft, flexible, and breathable.

Protechnic pro’bond hotmelt adhesive web

What are some of the specificities of thermoplastic adhesive web ?

The plastic adhesive web is available in rolls for continuous coating or lamination. Additionally, it can also be made with a paper carrier or a PE carrier to transfer adhesive to a substrate or to avoid tacky problems. For roll length, they are available in 300ml, 500ml, and 1000ml sizes at 76mm inner diameter


It’s really easy to bond it, in 2 steps only!


Why you should use hotmelt adhesive tape for hemming ?

  • To replace the sewing process
  • To make the process easier
  • To reinforce the finishing, and upgrade the quality


Step 1 : Preparation


  • Make sure your fabric / garment is pre-washed to avoid the narrowing of the hem.
  • Cut the length of hotmelt adhesive tape you need.


Working on more sustainable hotmelt adhesives.

We are living in a world where people are more aware of our planet and our future. We are proud to say, Protechnic, we are part of it. Our R&D department keeps searching for more sustainable and Eco-friendly adhesive materials. We have already succeeded to use some bio-based material. Today, we are even more driven to work in this direction.


Definition of hotmelt adhesive in roll

Hotmelt adhesive is also called thermoplastic adhesive. With different technology and process, it can be manufactured in a roll with different forms, such as Web, Film, Net, and Hybrid.


What is trimmed hotmelt adhesive product, and how to measure it?

A trimmed product means that the edge has been cut. There are two systems that can be applied: circular blade cutting or unwinding cutting. Circular blade cutting can make the edge very straight. However unwinding cutting, the material border is straight, when it get re-winded, the edge is not exactly neat.


How to measure trimmed products?


What is a headliner?

Headliners are made of composite fabrics, a combination of different materials with different functionalities. The composite parts are adhered to the roof of the car and help to improve the interior appeal as well as provide an element of insulation against heat and noise.

A typical headliner consists of multiple layers: a face side, a rigid core in the center, and a backing. The different layers consist of a multitude of materials such as knit or non-woven fabric, rigid foam, reinforcement material, etc. Liquid and dry adhesives (film, web, net) are then used to bond the different layers together in order to enhance the headliner’s unique shape and contours.

Functions of headliners

The multi-layered headliners bring together various functionalities:

  • better look and comfort through soft touch
  • stiffness of the roof
  • absorption of excess noise from the outside
  • insulation against heat and cold, regulation of internal temperature
  • improved acoustics for audio systems

Special requirements for headliner lamination

Compared to other interior parts of the car, headliners are much more likely to deviate from their original position due to their weight. The headliner can delaminate and eventually fall off after a period of poor handling or lack of care. This not only leads to a degradation of aesthetic value and comfort but also to declined safety and insulation of the car.

To ensure the headliner’s durability, the right choice of adhesive is very important. Heat, humidity, and time can significantly degrade the bonding strength of the adhesive and the different layers become less resistant and brittle.

Notably hot melt adhesives for dry lamination offer a good and clean alternative compared to liquid adhesives. Between the different layers, the Thermo adhesive can serve as barrier film and bonding, especially in the wet process, and they can be directly applied in the dry process for both the face and core sides.

Hot melt adhesives not only provide an efficient bonding and backing, but also an eco-friendly, sustainable and low VOC solution for headlining.

Do you want to know more about hot melt adhesives for automotive applications? Then have a look at our Protechnic adhesive products Linkhttps://www.protechnic.fr/probond-hotmelt-adhesive-bonding-in-a-sustainable-way/ or contact our expert team for more information.

41 Avenue Montaigne
68700 CERNAY – France
+33(0)389 356 000commercial@protechnic.fr


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