Road markings are essential for providing clear guidance and safety on roadways, from small rural roads to large urban highways. The United States has the most extensive road infrastructure in the world, with more than 4.1 million miles of public roads (of which about 2.8 million miles are paved). These roadways are heavily traveled, with about 3 trillion miles covered by vehicles annually. Traffic safety professionals employ a variety of traffic control devices to make our roads as safe as possible, including signs, signals, and road markings. Paint and coating technology plays a significant role in the manufacture of road markings.
Key information such as lane demarcation, indication of passing zones, and the highlighting of safety awareness zones (e.g., schools, crosswalks, and bicycle lanes) is communicated to drivers via road markings. To remain functional, lines and other markings must be visible to drivers. Film properties like adhesion and resistance to wear and abrasion (e.g., from tires or snowplows) are required to guarantee the line remains on the road surface.
Traffic paints and road markings are dominated by two technologies - waterborne paints and hot melt thermoplastics. The market is large and growing, and raw material manufacturers and coatings suppliers are constantly innovating to meet the performance demands of the industry. This article will discuss some of the science behind road markings, focusing on MMA cold plastic road marking paint.
What is MMA Cold Plastic Road Marking Paint?
Another high-solids solution for road markings are methyl methacrylate (MMA) coatings, also referred to as cold plastic. If you were to ask anyone if they knew what is ‘Methyl Methacrylate’, the answer you would get is a clueless face. As a civilian, you see these types of road markings daily, like pedestrian crossings, double yellow lines, and the dotted lines that make up the lanes of the motorways. Methyl Methacrylate or MMA markings are just one type of road marking that we see daily.
Cold plastic road marking is a two- or three-component material consisting of methyl methacrylate (MMA) resin, curing agents, and pigments. Cold plastic road marking is rapidly becoming the preferred choice for durable, high-performance road markings due to its long lifespan, wear resistance, and eco-friendly formulation. These 100% solids liquid coatings consist of acrylic monomers and oligomers which are mixed with a peroxide initiator just prior to application. After application to the road, a polymerization reaction rapidly occurs, resulting in a fully cured coating.
Read also: Arnis Sticks: A Comprehensive Guide
Properties of MMA Road Markings
MMA-based road marking paints are known for their rapid curing and high durability. One of the main benefits of working with MMA markings is their excellent and hard-wearing properties that stand the test of time. Methyl Methacrylate (MMA) road markings are some of the hardest wearing highways markings available for road marking contractors to use. They have been used to great success within the UK and throughout Europe in high traffic areas and high-stress locations such as junction markings, stop bars, hatching and other transverse markings.
Here's a breakdown of the key properties:
- Durability: MMA paint in Dallas can last up to a decade. Unlike other Texas road marking paint formulas, MMA doesn’t require frequent reapplications. Texas MMA can serve roads and properties for a decade. Many factors impact longevity and resilience. But even in the most high-stress applications, Texas road marking projects completed with MMA last several times longer than the alternatives.
- Retroreflectivity: Methyl Methacrylate (MMA) markings offer much a higher retro-reflectivity than traditional markings.
- Application: Texas methyl methacrylate marking paint is also easier to apply. It also cures in 15 to 30 minutes, minimizing the downtime required to apply road markings or stripes. Unlike thermoplastic paint, Texas MMA doesn’t need heating. Furthermore, the weather conditions needed for successful application are much more lax.
- Versatility: The paint is versatile, too. Contractors can pigment it in virtually any color or use additives to improve traction, increase reflectivity, etc.
Traditional line marking materials are prone to have a much shorter lifespan, and as such, they are often in need of regular maintenance. With the increased life of the marking and less requirement for refreshing, this means less site visits and less need for trucks and transport for materials and workforce to and from site.
Application Methods
Road marking contractors use this product for specific types of jobs, where thermoplastic markings may not be suitable. The most common way for small projects, junctions and logos/letters is usually hand-applying through a process called screeding using standard hand moulds. Spraying the lines across a highway or road can considerably speed up the MMA application process whilst still maintaining the high durability finish that it is known for. This can be applied by a few machines from are Graco Pavement marking range.
Recommended use Recommended to use for exterior and interior applications on asphalt, concrete, and epoxy floors as a line marking/sign markings in the public or private roads, runways, parking lots, buildings, factories, hospitals, etc. Surface Type Asphalt, concrete, and epoxy floors as line marking/sign markings in the public or private roads, vehicle parking area, buildings, factories, hospitals etc...
Read also: Texas Rattlesnake: A Wrestling Icon
Application Methods:
- Drop box
- Hand pushed machine
- Special machine (Extrusion type)
Cyclist safety is paramount, especially in partially sharing the road with my types of motorists. With the UK’s motorways and A-roads being the main travel routes across the country, these tend to have specific high traffic and high friction areas. It is crucial that the level of slip resistance remains consistently high, with all markings remaining clear and readable.
Resins Used in Road Marking Paints
Resin is commonly used as a binder in road marking paints to improve adhesion, durability, and visibility. Different types of resins are used based on the specific requirements of the application.
Here's a summary of common resins:
- Thermoplastic Resin: Thermoplastic road marking paints are widely used due to their excellent durability and visibility. The most common resin used in thermoplastic paints is a combination of synthetic resins, such as hydrocarbon resins（C5 resin）, EVA (ethylene-vinyl acetate) copolymers, and plasticizers.
- Cold Plastic Resin: Cold plastic road marking paints are a type of two-component system that includes a resin and a hardener. The resin component typically consists of acrylic or polyester resins.
- Waterborne Resin: Waterborne road marking paints are an environmentally friendly alternative to solvent-based paints. They use water as a carrier for the resin, which can be acrylic, styrene-butadiene, or other latex-based resins.
- Solvent-Based Resin: Solvent-based road marking paints use organic solvents as a carrier for the resin. The resin can be based on chlorinated rubber or alkyd resins.
- Epoxy Resin: Epoxy-based reflective facade paints offer superior adhesion and chemical resistance. They are commonly used for high-performance road markings, such as in areas with heavy traffic or in extreme weather conditions.
- MMA (Methyl Methacrylate) Resin: MMA-based road marking paints are known for their rapid curing and high durability. They are commonly used in high-traffic areas, such as highways and airports.
It’s important to note that different manufacturers may have proprietary formulations or variations in resin types for road marking paints.
Read also: New Generation of UFC Fighters
Standards and Regulations
To ensure high durability, safety, and environmental compliance, cold plastic road marking materials must meet international road safety and sustainability standards. State DOTs and municipal agencies are typical end-users of road markings and use qualified product lists (QPLs) to signal what products they have found acceptable for use on their roads. To be placed on a QPL, the road marking material will undergo testing to prove that it can provide satisfactory performance.
The driving force behind traffic paint formulations are state departments of transportation (DOTs), who are key end-users and ensure paint quality and performance through specifications.
MMA Road Marking Paint Application
The Importance of Retroreflectivity
Nighttime visibility relies on the principle of retroreflectivity. To be easily seen at night, the road marking must reflect light from the headlights back to the driver. This is accomplished by incorporating retroreflective glass beads into the road marking. For thermoplastic road markings, glass beads can be dropped on the film while still hot but can also be incorporated into the material before application. Light from the approaching headlight enters the glass bead, bends, reflects off the paint on the back of the bead, then bends again as it leaves the bead and is directed back to the driver.
The process of retroreflectivity for pavement markings.
Retroreflectivity can be measured in the laboratory or on installed traffic lines using portable instruments and according to standard methods for dry (ASTM E1710) or wet (ASTM E2177 and E2832) conditions.
Conclusion
In the more than 100 years since that first use, the technology and science behind road markings has progressed tremendously. Higher levels of durability and better retention of retroreflectivity lead to longer service lives and are good goals, as is improving retroreflectivity and thus driver visibility under wet conditions.
As a leading manufacturer of traffic safety materials with more than 30 years’ experience, Tory is committed to ongoing product development and excellent customer services that makes us the perfect partner for your road marking paint supply needs. We can provide you with raw materials (such as reflective glass beads, MMA resin, AW element etc.) with very competitive prices which can be customized to meet the specific requirements of customers and projects.