Why hot melt marking soft

Summer arrived, hot melt marking after construction, at midday, pavement marking will soften, thickness, reflective performance will disappear in the wheel, how to prevent this happening?Pavement temperature can not control, the coating formula that only begin:From what time to eliminate this phenomenon:1, resin softening point:The petroleum resin manufacturers ex-factory are nominal resin softening point 100 + 2 ℃, but the reality?Random domestic resin 15 samples 1 rosin resin, 14 C5 petroleum resin, softening point test down to only two resin reach factory nominal softening point, all the rest of the not reached the softening point of resin manufacturers call, only two of greater than or equal to 100 degrees.Reason: currently, paint manufacturers, in the pursuit of high flow property in this premise, reversed transmission resin manufacturers have to take more modifier (flow ping agent) to promote petroleum resin increased liquidity, in order to ensure the flow smooth performance, resin manufacturers have put the flow ping agent added to the limit, and on this premise, paint manufacturers and excessive reduce resin content, increase the content of polyethylene wax and shortening to hot melt marking paint flow performance, the result is that you produce hot melt coating quality is becoming worse.Recommended use: not less than 100 degrees of resin softening point2, polyethylene wax, softening point:Total extract polyethylene wax at home and abroad to 37 kinds of sample, test, respectively, softening point test, in addition to pure imported polyethylene wax softening point in the nominal range, the rest all domestic polyethylene wax, actual softening point is lower than the manufacturer by the nominal softening point.This is your hot melt coating is an important reason why very soft, manufacturer marked 100 degrees, and the actual test data may be less than 90 degrees.Reason: polyethylene wax itself also flow ping agent, dispersant, excessive add low melting point of polyethylene wax hot melt marking is not easy to dry, resulting from serious issue such as difference of fouling resistance.Recommended use: not less than 100 degrees of polyethylene wax, softening point is not containing paraffin wax3, white mineral oil:Baidu once known, white mineral oil is what material, so recommend, do not use this kind of oil as a plasticizer in summer, white mineral oil in hot melt coating is vile and appropriate.Reason: the application of white mineral oil is on the premise of reduced cost of thermoplastic and appear, because of low white mineral oil molecular weight in high temperature is easy to volatilize, so how much you add white mineral oil, are not much.And add the white mineral oil can greatly reduce the hot melt coating softening point, resulting in hot melt marking paint soft, not resistant to pollution, reduce the compressive strength and so on problems appear.Is not recommended to use4, dioctyl esterAs everybody knows, plasticizer dioctyl ester is general, but the dioctyl ester that sells on the market, for the most part more than mixed with not less than 20% of the poor white oil, it is conceivable that while you use dioctyl ester, available things may be fake!Recommended for normal manufacturer or dealer procurement quality assured.Recommended use: high purity DOPIf everyone can be a very good control the quality of the above four kinds of raw materials, then your hot melt coating will be a very good product.