Solid Drawing Material with Ester-Wax Resin for Non-Absorbing Surfaces
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Solution Overview
Problem
Conventional solid drawing materials face challenges in achieving smooth, dark writing on smooth non-absorbing surfaces like coated paper, plastic, metal, and glass without breaking, and in erasing easily, due to issues with strength and compatibility of components.
Innovation Solution
A solid drawing material comprising a resin, wax, pigment, titanium dioxide, and filler, with specific ratios of rosin, glycerin fatty acid ester, and pentaerythritol fatty acid ester, along with a protective sheet, to enhance strength, writing feel, and erasability, allowing for dark and clear drawing on non-absorbing surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the amount of oil is increased to soften the solid drawing material, then the softness is improved, but the strength decreases causing it to break easily
Solution Approach 1:
The patent changes the chemical composition parameters by replacing conventional oils with specific esters (glycerin fatty acid ester and pentaerythritol fatty acid ester) having controlled melting points of 65°C or lower. This parameter change allows the material to maintain softness for smooth drawing while the ester structure provides sufficient strength to prevent breaking during use and sharpening.
2Strength
If the amount of resin is increased to enhance strength, then the strength is improved, but the ability to draw on smooth non-absorbing surfaces deteriorates
Solution Approach 1:
The patent creates a composite material system combining esters (glycerin fatty acid ester and pentaerythritol fatty acid ester) with rosins and pigments. The ester component provides softness and drawing ability on smooth non-absorbing surfaces, while the rosin component contributes to strength and structural integrity. This composite approach allows both requirements to be satisfied simultaneously.
3Manufacturing precision
If the solid drawing material is made thin for fine drawing, then the fineness is improved, but the strength decreases causing it to break easily
Solution Approach 1:
The patent modifies the material composition parameters by using esters with specifically controlled melting points (65°C or lower) and combining them with rosins in predetermined ratios. This composition optimization allows the material to be formed into thin shapes for fine drawing while maintaining sufficient strength through the synergistic effect of the ester-robin composite structure.
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 solution provides a solid drawing material with excellent mechanical strength, smooth writing feel, and easy erasability on non-absorbing surfaces, capable of drawing darkly and clearly on transparent surfaces without breaking, while the protective sheet allows for tip exposure and sharpening.
Implementation Method 1
containing a glycerin fatty acid ester and/or a pentaerythritol fatty acid ester, each having a melting point of 65°C or lower
Data Source
Figure 1(A)~1(B)
Figure 2~3
Figure 4
AI summary
Provided is a solid drawing material with which it is possible to smoothly and darkly draw on a smooth non-absorbing surface such as coated paper, plastic, metal, glass, or whiteboard, as well as on conventional high-quality paper, drawing paper, or copy paper and the like, and with which it is also possible to draw darkly and clearly on a transparent flat surface such as transparent plastic or glass, and to easily erase a drawing on these non-absorbing surfaces using a fabric, paper such as tissue paper, orwhiteboarderaser, and the like. A solid drawing material containing at least a resin component, a wax component, a pigment, titanium dioxide, and a filler, wherein the resin component includes rosin and/or modified rosin in an amount that is within the range of 0.5 to 20 wt%, and the wax component includes a glycerin fatty acid ester and/or pentaerythritol fatty acid ester, both fatty acid esters having a melting point of 45°C or higher, in an amount that is within the range of 8 to 50 wt%.