Heat-sensitive Recording Material with Paint Developers from Renewable Raw Materials

Simple SummaryContent extracted from patent full text and abstract with AI.

This invention relates to a heat-sensitive recording material, commonly used in thermal paper applications (such as receipts or tickets). Instead of relying on conventional chemical developers, which may be potentially harmful to the environment and human health, this material uses color developers derived entirely or partly from renewable, natural, plant-based raw materials (like tannins, flavonoids, certain acids, saccharides, lignins, and related compounds). The patent also describes how these natural substances can be combined with known color formers to produce thermal prints when exposed to heat.

Use CasesContent extracted from patent full text and abstract with AI.

• Thermal paper for point-of-sale receipts and tickets (retail, transport, venues)
• Self-adhesive labels for logistics, healthcare, or retail
• Medical recording paper (e.g., ECG/EEG diagram paper)
• ATM receipts and bank statements
• Parking, event, or transport tickets (bus, train, airline, etc.)
• Barcode and security labels
• Fax paper or other direct thermal-printing applications

BenefitsContent extracted from patent full text and abstract with AI.

• Reduces environmental impact by using renewable, plant-derived chemicals instead of petrochemical-based or toxic developers (such as Bisphenol A or S)
• Improves the sustainability and eco-friendliness of disposable thermal papers
• Minimizes user and environmental exposure to potentially hazardous chemicals
• No need for toner or ink cartridges in printers, simplifying maintenance and lowering operating costs
• Compatible with existing thermal print technologies
• Potentially easier recycling or composting of printed paper, contributing to circular material economies

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The present invention relates to a heat-sensitive recording material comprising i) a carrier substrate and ii) a heat-sensitive recording layer, wherein the heat-sensitive recording layer comprises at least one color former and at least one color developer, and the color developer or at least one of the color developers is selected from the group consisting of natural tannins, alkali or alkaline earth metal salts of tannins, oligomeric proanthocyanidins, flavonoids, carboxylic acids, saccharides, saccharide derivatives, carboxymethyl celluloses, resin acids, phytosterols, coumarins, monomeric phenolic compounds, lignins, lignans, fatty acids, extracts from delignification processes, and polycondensation products prepared at least from pinoresinol, catechin, succinic acid and/or mandelic acid as monomeric units.