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【指南】热熔反光标线技术指南
2021-11-30 16:35:04   来源:标线涂料网

【指南】热熔反光标线施工指南
【指南】热熔反光标线施工指南
 
A Guide to Thermoplastic Road Markings What is Thermoplastic?

Thermoplastic is a long life road marking material that was first used in the USA in 1958, followed quickly by its introduction into many countries throughout Europe. It is a mixture of glass beads, binder, pigment and filler material. Thermoplastic as its name suggests has to do with heat. Dry thermoplastic compound is generally heated in a thermostatically controlled pre-heater/boiler to a temperature of 170-210 oC and agitated continuously until a homogenised liquid is achieved, before transferring to an application vehicle. Applied at this temperature, the thermoplastic melts into the upper surface of the asphalt forming a thermal bond. When applying onto a concrete surface, the use of a tack coat primer is recommended.


What is the purpose of each ingredient in the mixture?

Glass Beads - often called intermix beads in conjunction with the pigment, give the material the retroreflectivity necessary for the bright night-time appearance. Binder - is a mixture of plasticiser, waxes, antisettling agents and resins that hold all the other ingredients together;  Plasticiser affects the flexibility and melt viscosity  A blend of modified waxes is utilised to give the desired viscosity and flow  Anti-settling agents help to keep aggregates and glass beads in suspension Pigment - supplies the colour - white or yellow to the thermoplastic. Titanium dioxide pigment is used for the white thermoplastic and heat stable yellow to make the yellow thermoplastic. Filler Material - can consist of various grades of calcite (calcium carbonate) quartz (silica) or calcined flint. Finer white grades are extender 
added to assist the dispersion of pigment in the mixture, thereby providing colour uniformity throughout.

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