Thermoplastic Introduction

Synthetic Thermoplastic Road Marking

Thermoplastic Road Marking Material White Screed

Type of Tests Conducted Requirements of BS 3262 Part 1 : 1989
  • Binder Content (Appendix C)
  • Passing Through 2.8mm BS 410 sieve (Appendix D)
  • Passing through 600 BS 10 sieve (Appendix D)
  • Glass beads content (Appendix D)
  • Softening point (Appendix F)
  • Luminance factor (Appendix F)
  • Heat stability on luminance factor (Appendix G)
  • Skid resistance (Appendix J)
  • Flow resistance (Appendix H)
  • 18-22%
  • 100%
  • 65-95%
  • 20% minimum
  • 65 C minimum
  • 70% minimum
  • 65% minimum
  • 45 minimum
  • 25% maximum

Synthetic thermoplastic road marking material consists of a mixture of pigment, glass beads, binder and filler materials .The general composition is as follows. However this will be varied for different grade of materials that is to be produced.

Pigment :- supplies the colour to the thermoplastic.

Glass beads :- provides the material retroreflectivity necessary for its bright night appearance.

Binder :- this is a mixture of plasticizer and resins that holds all of the other ingredients together

Filter materials :- it includes calcium carbonate and other substances that provide the bulk.

Application
  • The thermoplastic material shall be melted down in a pre-heated boiler fitted with a mechanical strirrer to prevent overheating and discolouring.
  • The temperature shall not exceed the manufacturer's specified application temperature of 200 °C for white and 180 °C for yellow. At this temperature the thermoplastic melts into the upper surface of the asphalt forming a thermal bond.
  • Application is done either by hand-propelled or self-propelled machine.
  • The surface to be applied shall be free from dirt, dust and other objectionable materials .
  • During application, drop-on glass beads is applied concurrently on to the line. This will provide the line with immediate reflectivity.

Road marking visibility at night can only be achieved by the addition of tiny solid glass beads during the application of thermoplastic line. Maximum reflectivity of individual glass beads occurs when the optimum degree of embedment is achieved. This happens when 60% of the bead is below the surface of the pavement marking materials.

Optimum retro-reflective requires round sphere. Non-round spheres do not reflec light efficiently but scatter it in random directions.

Super Synthetic Plus

MLS SUPER SYNTHETIC PLUS is An All Weather Thermoplastic Road Marking Material designed t omeet the BS EN 1436:2007 + A1:2008 Standards. It is manufactured using specially formulated mix of Hydrocarbon Binder, Premium, Glass Beads, Plastisizers together with the incorporation of High Refractive Index Bead to achieve excellent visibility for Wet and Dry road condition. The Application can be carried out using any Standard Thermoplastic Screed Machine that is currently available.

Performance Criteria of MLS Super Synthetic Plus Material

Type Of Test BS EN 1436:2007
+ A1:2008 Requirement
JKR Requirement
JKR/SPJ/2012.S6
LLM Guidelines LLM/GP/T21-10
For Highway Operator
Remark
Coefficient of Retroreflected Luminance (RL)
On Dry Condition Under Car Head Lamp Illumination
Minimum Of (RL)
300mcd/m2/1x Class R5
Minimum Of (RL)
300mcd/m2/1x
Minimum Of (RL)
300mcd/m2/1x
Complied
Coefficient of Retroreflected Luminance (RL)
On Wet Condition
Minimum Of (RL)
150mcd/m2/1x Class RW6
Minimum Of (RL)
75mcd/m2/1x
Minimum Of (RL)
75mcd/m2/1x
Complied
Coefficient of Retroreflected Luminance (RL)
On Continuous Rain Condition
Minimum Of (RL)
150mcd/m2/1x Class RR6
Minimum Of (RL)
75mcd/m2/1x
Minimum Of (RL)
75mcd/m2/1x
Complied
Skid Resistance Shall Not Be Less
Than SRT 45
Shall Not Be Less
Than SRT 45
Shall Not Be Less
Than SRT 45
Complied