Ablation-Resistant Coated Paper for Erasable Printing
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Solution Overview
Problem
Current erasable paper technologies require special printers, toners, and inks, and often damage standard paper, limiting reuse to a few cycles due to discoloration and deformation, necessitating separate printing systems for storage and erasable purposes.
Innovation Solution
Development of enhanced paper with an ablation-resistant coating that allows erasure using a light beam without damaging the paper, maintaining physical properties for use with standard printers and inks, and enabling multiple reuse cycles without discoloration or deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If standard paper is used with conventional printing methods, then printing compatibility is good, but the paper can only be reused a limited number of times (2-4 cycles) due to damage, discoloration, and deformation
Solution Approach 1:
The patent applies composite materials by combining standard cellulose paper with a specialized coating layer containing photopolymer particles and a photoinhibitor. This composite structure allows the paper to maintain its standard printing compatibility while gaining erasability through the coating's photochromic properties, enabling multiple reuse cycles without damage.
Solution Approach 2:
The patent utilizes parameter changes by employing a photoinhibitor that alters the paper's optical properties when exposed to specific wavelengths of light. The photoinhibitor prevents premature curing and enables controlled erasing through light exposure, allowing the paper to be erased and reused multiple times while maintaining structural integrity.
2Ease of operation
If photochromic or thermochromic treatments are applied to enable erasing, then erasability is achieved, but the paper requires specially designed printers and inks, increasing device complexity
Solution Approach 1:
The patent achieves universality by designing the enhanced paper to be compatible with both standard printers and erasing devices. The coating layer with photopolymer particles and photoinhibitor allows the same paper to function with conventional printing systems while also enabling erasing through light exposure, eliminating the need for separate printing systems.
Solution Approach 2:
The patent uses an intermediary approach by introducing a coating layer as a mediator between the standard paper and the erasing process. This coating contains photopolymer particles that can be cured during printing and erased through light exposure, serving as an intermediary mechanism that enables erasing without requiring changes to the standard printing system.
3Ease of operation
If laser beams are used to ablate toner from paper, then erasing is achieved, but the paper suffers discoloration and deformation, limiting reuse
Solution Approach 1:
The patent applies preliminary anti-action by incorporating a photoinhibitor in the coating layer that prevents damage to the paper during the erasing process. The photoinhibitor counteracts the harmful effects of laser exposure by controlling the photochromic response, allowing toner removal while preventing discoloration and deformation of the paper substrate.
Solution Approach 2:
The patent utilizes parameter changes by employing a photoinhibitor that modifies the paper's response to laser energy during erasing. The photoinhibitor changes the optical parameters of the coating layer, enabling selective absorption and reflection of laser energy to remove toner while protecting the paper from thermal and optical damage that would cause deformation.
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 enhanced paper can be erased multiple times without damage, maintaining print quality and physical properties, allowing for efficient reuse and reducing waste by integrating with standard printing systems.
Implementation Method 1
The enhanced paper is ablation resistant so that it is not damaged by a light beam that illuminates enhanced paper with a fluence that ablates ink or toner
Implementation Method 2
a light beam that illuminates enhanced paper with a fluence that ablates ink or toner
Data Source
AI summary
An enhanced paper for printing, including a substrate, an ablation resistant coating applied to the substrate, wherein the enhanced paper is ablation resistant so that it is not damaged by a light beam that illuminates enhanced paper with a fluence that ablates ink or toner but would damage standard printing paper that is made from cellulose fiber and is non-ablation resistant; and wherein the enhanced paper has physical properties of the standard printing paper for printing with laser printers and ink printers.