Intermixed Drying Agent and Optical Elements for Pavement Marking
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Solution Overview
Problem
Existing reflective pavement marking systems face issues with the intermixing of drying agents and binders, leading to clogging of dispensing mechanisms and reduced retroreflectivity due to water coverage and erosion, which affects visibility, especially in inclement weather and high-traffic conditions.
Innovation Solution
A system where a drying agent and optical elements are stored and dispensed together in an intermixed composition directly into the binder stream, preventing coagulation and ensuring unhindered application, thereby maintaining retroreflectivity and reducing maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If drying agent is applied separately to the binder, then drying speed is improved, but dispenser clogging occurs and application precision deteriorates
Solution Approach 1:
The patent combines the drying agent and optical elements into a single intermixed composition that is dispensed together in one operation. This merging eliminates the need for separate dispensing of drying agent, preventing dispenser clogging while maintaining rapid drying performance. The combined composition is applied simultaneously with the binder in a single coating pass.
Solution Approach 2:
The intermixed composition serves multiple functions simultaneously: it provides drying acceleration, maintains retroreflectivity through optical elements, and ensures consistent application without clogging. The single composition performs what previously required separate materials and separate dispensing operations.
2Reliability
If drying agent beads are dispensed separately, then drying function is achieved, but metering precision is lost due to coagulation
Solution Approach 1:
By intermixing the drying agent with optical elements in a single composition, the system eliminates coagulation issues that plague separate bead dispensing. The optical elements act as spacers that prevent drying agent particles from clumping, ensuring consistent metering and reliable drying function throughout the application process.
Solution Approach 2:
The optical elements serve as an intermediary substance that prevents coagulation of the drying agent particles. By dispersing the drying agent within a matrix of optical elements, the system maintains particle separation and ensures precise, consistent metering without the coagulation problems of pure bead dispensing.
3Illumination intensity
If water film covers pavement marking, then retroreflectivity is reduced, but this condition cannot be prevented by conventional application methods
Solution Approach 1:
The intermixed composition of drying agent and optical elements accelerates the drying of the binder, causing the pavement marking to dry faster before water from rainfall can form a detrimental film on the surface. This preliminary drying action prevents the water coverage problem before it occurs.
Solution Approach 2:
By changing the drying rate parameter through the use of drying agent in the intermixed composition, the system alters the temporal sequence of events during application. The accelerated drying parameter ensures the marking dries before water coverage can occur, maintaining retroreflectivity in wet conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The intermixed system enhances retroreflectivity, prevents dispenser clogging, and allows for precise metering and faster drying, ensuring consistent visibility and extended performance of pavement markings even in wet conditions and high-traffic areas.
Implementation Method 1
drying agents are applied to the binder. These drying agents allow the pavement to be marked during damp conditions and also speed up the application process
Implementation Method 2
As light from the headlamp of a vehicle impinges upon the microsphere, it is refracted towards the reflective pigment. Refraction as used herein refers to the deflection of light from its original pathway. A portion of the scattered light is directed back through the optical element and is directed back along the original path towards the driver, increasing the visibility of the markings. This results in a retroreflective effect
Implementation Method 3
The light passes through the optical element and is scattered by the pigment-containing pavement paint
Data Source
AI summary
The present invention provides a marking system adapted for coating a surface of a substrate in which a drying agent is used. According to a first aspect of the invention, a binder layer, such as paint, is applied to the surface. A drying agent is dispensed into the spray of a binder and becomes incorporated with the binder on the substrate surface. The incorporation of the drying agent into the binder prior to application on the surface provides improved mixing of the drying agent and binder and improved performance. According to a second aspect of the invention, a combination of optical elements and a drying agent are stored in a common hopper and are dispensed into the spray of the binder and become incorporated with the binder on the substrate surface. The mixture of optical elements and drying agent prevents coagulation of the drying agent and the resulting clogging of the dispenser.