Recyclable Release Substrate Using Vegetable Oil Wax

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Solution Overview

Problem

Silicone-containing release papers are not recyclable and non-biodegradable, posing environmental issues and limiting the use of renewable raw materials in release coatings.

Innovation Solution

A release substrate composed of a carrier substrate with a release layer made from a polymeric binder and a wax based on vegetable oil, which provides release properties without silicones or perfluorinated compounds, allowing for recyclability and biodegradability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If silicone-containing release layers are used, then release properties with respect to adhesive layers are achieved, but recyclability and biodegradability are compromised

Engineering Contradiction:

Improverelease propertiesVSAvoidrecyclability

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent changes the chemical composition parameters of the release layer by replacing silicone compounds with vegetable oil-based waxes and polymeric binders. This substitution maintains the release function while enabling recyclability, as the new materials can be processed in standard paper recycling streams without disrupting the recycling process.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention employs a release layer based on vegetable oil waxes and polymeric binders that are designed to be disposable and recyclable. These materials can be easily separated and processed in recycling facilities, allowing the release substrate to be discarded after use and converted into new paper products without requiring complex recovery processes.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Reliability

If silicone-containing release layers are used, then release properties are achieved, but environmental compatibility and biodegradability deteriorate

Engineering Contradiction:

Improverelease propertiesVSAvoidenvironmental compatibility

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent converts the previously harmful silicone-containing materials into beneficial environmentally compatible materials by using vegetable oil-based waxes and polymeric binders. These new materials are biodegradable and can be composted, transforming the release layer from an environmental contaminant into an eco-friendly component that breaks down naturally after use.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The invention creates a composite release layer combining vegetable oil-based waxes with polymeric binders. This composite structure maintains the effective release properties needed for adhesive label applications while incorporating biodegradable components that enhance environmental compatibility and allow for composting of the entire release substrate.

Inventive Principle:

Principle #40Composite materials

3Object-affected harmful factors

If renewable raw materials are used in release coatings, then environmental compatibility improves, but release properties may be compromised

Engineering Contradiction:

Improveenvironmental compatibilityVSAvoidrelease properties

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent develops a composite material system combining vegetable oil-based waxes with specifically selected polymeric binders. This composite approach allows the renewable vegetable oil component to provide environmental compatibility while the polymeric binder ensures adequate adhesion and release properties, achieving both eco-friendliness and functional performance.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention optimizes the chemical and physical parameters of the vegetable oil-based wax and polymeric binder combination to achieve the desired release characteristics. By carefully selecting and adjusting parameters such as wax molecular weight, polymeric binder composition, and their ratio, the system achieves effective release properties while maintaining full biodegradability and environmental compatibility.

Inventive Principle:

Principle #35Parameter changes

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 release substrate effectively separates adhesives without silicones, enabling recyclability and biodegradability, thus addressing environmental concerns and utilizing renewable resources.

Implementation Method 1

a release layer (12) disposed on the front side and/or reverse side of the carrier substrate (11), wherein the release layer (12) comprises or consists of a polymeric binder and a wax based on a vegetable oil

Methodology Applied

Scientific EffectRelease properties: Lubrication

Data Source

PatentUS11365516B2Recyclable release substrate

Publication Date: 2022.06.21 MITSUBISHI HITEC PAPER EURO

AI summary

A release substrate includes: a carrier substrate having a front side and a reverse side opposite the front side, and a release layer disposed on the front side and/or reverse side of the carrier substrate. The release layer includes a polymeric binder and a wax based on a vegetable oil.