Permanently strong adhesion with PT-Bond
PT-Bond is a special bonding agent layer created with our PlasmaPlus® technology to achieve functionalized surfaces. When using PT-Bond, a liquid precursor is injected into the plasma, which is generated under atmospheric pressure (i.e. under normal conditions). The substrate is coated with an ultra-thin, transparent plasma polymer layer in the nanometer range.
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FEATURES &
ADVANTAGES
PT-Bond for plastics, glass & metal
- Flexible application
- Targeted application
- Long-term stable bonding
- Sustainable use
- Lean production processes
- Full process control
- Complete automation capability
Resistant adhesion of plastics with PT-Bond
The VOC-free plasma technology PT-Bond can replace almost all water- and solvent-based primers for surface preparation in industrial production. In order for the adhesion to the plastic to be higher than the cohesion in the adhesive, it must meet certain requirements: The durability of the bond must be guaranteed and the strict process requirements (DIN 2304) must be met.
- After PT-Bond treatment, the adhesive cracks and splits on both sides of the substrates, see left image.
- Without PT-Bond treatment, the adhesive fails. In this case, the adhesive remains on one side of the two substrates, see right image.
From problem to solution
Depending on the plastic used, the surface energy varies and pretreatment alone is not sufficient to achieve high adhesion. In addition, some additives can have negative effects in combination with the adhesive. Insufficient wetting of the plastic surface with the adhesive can also lead to adhesion problems. Plasmatreat solves this adhesion problem by using the PlasmaPlus® technology, which applies the PT-Bond plasmapolymer layer on difficult-to-bond plastics. The bifunctional PT-Bond layer provides an adhesion promoting to both the plastic and the adhesive.
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Resources
Discover how our Openair-Plasma® technology can enhance your processes. From the initial concept to successful implementation, we offer personalized, innovative, and sustainable support every step of the way.
Gluing glass safely with PT-Bond
When aesthetics and robustness are the priority, glass is the preferred material; however, the chemical resistance of glass makes it very hard to glue without using a special primer.
This is why, when applying a primer as a bonding agent, it is important to avoid contamination caused by overspraying in the visible area by masking.
Over the years, glass bonds must withstand forces caused by uneven thermal expansion coefficients. Force-transmitting adhesives such as STPU, PU, or SM polymers do not stick without a bonding agent or do so poorly. The PT-Bond coating maximizes the durability of adhesives on glass. The fracture pattern is always cohesive: The bond is stronger than the adhesive itself – even when subject to extreme loads.
The introduction of the PlasmaPlus® polymerization system in automotive windshield bonding replaces the entire wet chemi-cal pretreatment. The first step is microfine cleaning and high activation of the ceramic screen print by plasma rotary nozzles. Immediately afterwards the nanofine PlasmaPlus® coating is applied and, as the final step, the adhesive is applied. This process optimization not only reduces costs, since a signifi-cantly lower amount of material is required for the nano-thin adhesive layer, but also because the process can be fully automated.
Consulting&
Resources
Discover how our Openair-Plasma® technology can enhance your processes. From the initial concept to successful implementation, we offer personalized, innovative, and sustainable support every step of the way.
Durable metal bonding with PT-Bond
Hybrid bonds with metals may prove to be challenging, since many adhesives are adequate for one of the materials but unsuitable for the other. Pretreating the surface with PT-Bond improves the strength of the adhesive and ensures a durable and stable bond. Unlike conventional primer application, the application of PT-Bond also allows seamless integration into production processes, which is characterized, for example, by complete automation and eliminated drying times.
Criteria such as resistance in comparison with mechanical loads at different temperatures, changing weather conditions or even contact with solvents and other chemicals, are decisive for the adhesive bond. Due to the constantly advancing development of material combinations, e.g. in lightweight construction, there are always new requirements being placed on force-transmitting adhesives that do not bond or bond poorly without adhesion promoters.
Plasmatreat solves these adhesion problems by applying a plasma polymer layer of PT-Bond to metal using PlasmaPlus® technology. The result is durable and strong metal hybrid bonds without primer, preventing corrosion even in difficult joints. The PT-Bond layer acts as a bonding agent with both the substrate and the adhesive.
Consulting&
Resources
Discover how our Openair-Plasma® technology can enhance your processes. From the initial concept to successful implementation, we offer personalized, innovative, and sustainable support every step of the way.
AEC Illuminazione Srl -
Pre-treatment of glass and stainless steel for street lamps
This video shows the following benefits of the PlasmaPlus® treatment:
- Automation of the complete bonding process
- Replacing primers
- High process speed, no drying time, no solvents
- Cost reduction: Enables replacement of several preformed gasket types with one PUR-FIPG (polyurethane formed-in-place gasket)
