Starch Slurry Foam for 3D Compostable Insulation

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Solution Overview

Problem

Existing insulation materials, particularly petroleum-derived foams, are non-recyclable and non-compostable, leading to significant waste, and extrusion processes are capital-intensive, limited to two-dimensional shaping, and struggle to produce consistent foam layers of desired thicknesses.

Innovation Solution

Starch slurries with specific compositions and processes that allow for on-demand extrusion, enabling three-dimensional shaping and reduced energy consumption, scalability, and the ability to form customized foam designs and patterns.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If petroleum-derived foams are used for insulation, then thermal insulation performance is improved, but environmental sustainability deteriorates due to non-recyclability and non-compostability

Engineering Contradiction:

Improvethermal insulation performanceVSAvoidenvironmental sustainability

Core Design Contradiction:

TemperatureVSObject-affected harmful factors

Solution Approach 1:

The patent changes the material composition parameter from petroleum-based polymers to starch-based materials, transforming the chemical composition while maintaining the insulation function. This substitution maintains thermal performance while achieving compostability and recyclability, directly resolving the environmental sustainability issue.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite materials by combining starch with plasticizers and other additives to create a foam structure that mimics petroleum-derived foams. This composite approach allows the material to achieve both the desired thermal insulation properties and environmental sustainability through natural, compostable components.

Inventive Principle:

Principle #40Composite materials

2Productivity

If extrusion processes are used for foam production, then manufacturing efficiency is improved, but device complexity and capital investment increase

Engineering Contradiction:

Improvemanufacturing efficiencyVSAvoidextrusion equipment complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical extrusion systems with a simpler process that uses controlled expansion of starch-based slurries. Instead of requiring sophisticated extrusion machinery with precise dimensional control, the invention uses a more straightforward process that achieves foam formation through material expansion, reducing device complexity and capital investment.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If extrusion is used to produce foam sheets, then production speed is improved, but shaping flexibility deteriorates as it is limited to two-dimensional forms

Engineering Contradiction:

Improveproduction speedVSAvoidshaping flexibility

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent transitions from two-dimensional extrusion to three-dimensional foam formation by allowing the starch slurry to expand and conform to three-dimensional molds or containers. This dimensional change enables the production of corner protectors, custom-shaped insulation pieces, and other three-dimensional forms while maintaining production efficiency.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

4Manufacturing precision

If extrusion is used for foam production, then consistent thickness control is improved, but scalability to larger dimensions deteriorates

Engineering Contradiction:

Improvethickness consistencyVSAvoidscalability to larger dimensions

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent divides the foam production process into manageable segments or sections that can be independently controlled and then assembled. This segmentation allows for consistent thickness control in each section while enabling the production of large-scale insulation systems by combining multiple sections, thus achieving both precision and scalability.

Inventive Principle:

Principle #1Segmentation

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 starch slurry method produces recyclable and compostable insulation products with consistent thickness, reducing waste and manufacturing costs while offering flexible, customizable foam production.

Implementation Method 1

expanding the starch slurry to create a continuous or discontinuous foam layer on the substrate

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Implementation Method 2

expanding the starch slurry to create a continuous or discontinuous foam layer

Methodology Applied

Scientific EffectPhase change: Phase Change

Data Source

PatentUS20250346742A1Starch slurries, systems and methods of making starch slurries, and systems and methods of making insulated products using starch slurries

Publication Date: 2025.11.13 TEMPERPACK TECHNOLOGIES INC

AI summary

A starch slurry includes a starch in an amount of between approximately 25 to 98 weight percent, a plasticizer in an amount of between approximately 3 to 30 weight percent, and water in an amount of between approximately 5 to 60 weight percent. The starch slurry can have a bulk density of between approximately 10 to 100 pounds per cubic foot. The starch slurry can be used for generating insulation products or printing a starch foam.