Pea Potato Starch Adhesive for Corrugated Cardboard

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Solution Overview

Problem

Current adhesive compositions for corrugated cardboard rely heavily on boron-carrying compounds like borax, which are subject to strict regulations due to health and environmental concerns, and replacing them with alternatives often results in reduced bonding performance, increased costs, and image issues.

Innovation Solution

A pea starch/potato starch combination is used to reduce or eliminate boron-carrying compounds in adhesive compositions, acting as a bonding aid to achieve equal or superior bonding performance compared to compositions containing borax.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If boron-carrying compounds like borax are used in adhesive compositions, then bonding performance is improved, but health hazards and regulatory concerns increase

Engineering Contradiction:

Improvebonding performanceVSAvoidhealth hazards

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The invention extracts and removes boron-carrying compounds from the adhesive composition entirely, replacing them with alternative starch-based systems that achieve bonding performance without the harmful boron additives

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention uses readily available, inexpensive starch materials (potato, corn, wheat starch) as substitutes for borax, employing common industrial materials that are already widely used and well-understood in the corrugated cardboard industry

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Object-affected harmful factors

If boron-carrying compounds are replaced with alternative additives, then health hazards are reduced, but bonding performance decreases

Engineering Contradiction:

Improvehealth hazardsVSAvoidbonding performance

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The invention employs composite starch systems combining multiple starch types (potato starch, corn starch, wheat starch) with specific granulometry distributions to achieve superior bonding performance that exceeds traditional borax-based systems, while maintaining health safety

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention optimizes critical parameters including starch granulometry distribution (combining fine and coarse particles), starch modification levels, and composition ratios to maximize bonding performance without requiring boron-carrying compounds

Inventive Principle:

Principle #35Parameter changes

3Strength

If complex formulations with multiple additives are used to improve bonding performance, then bonding performance is improved, but device complexity and manufacturing cost increase

Engineering Contradiction:

Improvebonding performanceVSAvoidformulation complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The invention uses starch that performs multiple functions simultaneously: it acts as the primary adhesive binder, provides the necessary viscosity, contributes to bonding strength, and eliminates the need for separate boron additive systems, thereby simplifying the overall formulation

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

Instead of adding boron compounds to modified starch as is conventional practice, the invention inverts the approach by using carefully selected and modified starch systems that inherently provide all necessary bonding functions without requiring boron additives

Inventive Principle:

Principle #13The other way round (Inversion)

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 pea starch/potato starch combination effectively replaces boron-based additives, enhancing bonding performance by over 30% compared to borax and sodium aluminate, while eliminating health hazards and regulatory concerns, and is easier to implement with minimal adjustments to existing processes.

Implementation Method 1

Under the influence of temperature, the granular starch swells and gelatinizes. The gelling agent thus obtained allows rapid bonding

Methodology Applied

Scientific EffectGelatinization: Phase Change

Implementation Method 2

the compounds containing boron react with the soluble starch, and allow the crosslinking of the starch in the primary part on the one hand, and in the secondary part on the other hand

Methodology Applied

Scientific EffectCrosslinking: Chemical Bonding

Data Source

PatentEP2943548B1Use of a leguminous starch / tuber starch combination to reduce the boron content in an adhesive composition, and adhesive compositions comprising such a combination

Publication Date: 2022.12.07 ROQUETTE FRERES SA

AI summary

Use of a leguminous starch / tuber starch combination to reduce the boron content in an adhesive composition, and adhesive compositions comprising such a combination. The present invention concerns the use of a leguminous starch / tuber starch combination to reduce the boron content in an adhesive composition and/or as a bonding adjuvant in an adhesive composition for corrugated cardboard and/or for preparing an adhesive composition free of boron-bearing compounds. It also concerns the adhesive compositions comprising such a combination. The present invention more particularly concerns adhesive compositions for corrugated cardboard, and the use thereof in the assembly of corrugated cardboard.