Vegetable Starch Composition for Compostable Straws and Cutlery

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Solution Overview

Problem

Conventional disposable drinking straws and cutlery are neither recyclable nor compostable, leading to environmental harm and a need for biodegradable alternatives that are also suitable for medical supplies.

Innovation Solution

Production of biodegradable instruments using vegetable starch, vegetable thickeners or gelling agents, cellulose, wood pulp, and wax, which can be composted within 4-8 weeks and fully biodegraded in 50 days, with optional coatings for extended composting times.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If conventional plastic materials are used for disposable drinking straws and cutlery, then ease of manufacture and durability are improved, but environmental harm and lack of compostability worsen

Engineering Contradiction:

Improveease of manufactureVSAvoidenvironmental harm

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent changes the material composition parameters by using vegetable starch (40-70%), vegetable thickeners (20-50%), and vegetable oils (5-20%) instead of conventional plastics, transforming the product from non-compostable to compostable while maintaining manufacturability through extrusion processes

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite material system combining multiple vegetable-based components (starch, thickeners like guar gum or xanthan gum, oils, and optional additives) to achieve both compostability and functional properties required for drinking straws and cutlery

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If vegetable starch and vegetable thickeners are used to produce biodegradable aids, then compostability and environmental friendliness are improved, but manufacturing complexity and process difficulty worsen

Engineering Contradiction:

Improveenvironmental friendlinessVSAvoidmanufacturing complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent optimizes formulation parameters within specific ranges (starch 40-70%, thickeners 20-50%, oils 5-20%) to balance compostability with processing characteristics, enabling standard extrusion manufacturing without requiring complex specialized equipment or processes

Inventive Principle:

Principle #35Parameter changes

3Strength

If conventional plastic materials are used, then product durability and structural stability are improved, but biodegradability and compostability worsen

Engineering Contradiction:

Improvestructural stabilityVSAvoidbiodegradability

Core Design Contradiction:

StrengthVSDuration of action of stationary object

Solution Approach 1:

The patent changes the temporal parameter of material persistence by designing a formulation that maintains structural integrity during use but decomposes within 4-8 weeks in composting conditions, achieved through the selected vegetable-based composition

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The composite of vegetable starch with vegetable thickeners (guar gum, xanthan gum, carrageenan) and oils creates a material that balances structural stability for functional use with controlled biodegradability for environmental disposal

Inventive Principle:

Principle #40Composite materials

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 environmentally friendly, compostable, and biodegradable alternatives for drinking straws, cutlery, and medical supplies, reducing environmental impact and ensuring safe disposal without harming ecosystems.

Implementation Method 1

The aids for eating or drinking according to the present invention are fully biodegradable within a period of 50 days

Methodology Applied

Scientific EffectBiodegradation: Decomposition (biological)

Implementation Method 2

The aids for eating or drinking according to the present invention are compostable within a period of 4-8 weeks, preferably compostable within 4 weeks

Methodology Applied

Scientific EffectComposting: Composting

Implementation Method 3

The aids for eating or drinking according to the present invention may further comprise wax, preferably carnauba wax or soy wax

Methodology Applied

Scientific EffectHydrophobicity: Hydrophobe

Data Source

PatentUS20220325079A1Compostable aids for eating or drinking made of vegetable starch and vegetable thickener or gelling agent and methods for producing same

Publication Date: 2022.10.13 HOPE TREE INT GMBH

AI summary

The present invention relates to compostable tools for eating and for drinking, such as drinking straws or cutlery. The present invention furthermore relates to biodegradable medical commodities such as cotton swabs, tongue depressors or disposable toothbrushes. The tools and the medical commodities of the present invention comprise plant starch and plant-based thickener and gelling agents and can furthermore comprise cellulose/mechanical pulp, wax, oil and/or glycerine. The tools and the medical commodities of the present invention can furthermore comprise an outer coating which preferably comprises wax and/or a bipolymer, preferably rubber. The present invention additionally relates to a method for producing compostable tools for eating or drinking and for biodegradable medical commodities.