Starch-Based Padding for Recyclable Padded Mailers

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Solution Overview

Problem

Current padded mailers often use non-recyclable plastic for padding, which is environmentally unfriendly and inefficient in terms of material usage and production speed.

Innovation Solution

A starch-based padding system is developed, where starch-based particles are applied between paper-based webs with a heat seal coating, allowing for recyclable, biodegradable, and compostable padded materials that can be formed into roll stock and mailers using an extruder and vacuum-based placement devices, enabling efficient production and packaging.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If plastic padding is used in padded mailers, then cushioning protection is provided, but the material is non-recyclable and environmentally harmful

Engineering Contradiction:

Improvecushioning protectionVSAvoidenvironmental harm

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the material parameter from plastic to starch-based particles, transforming the padding material into a biodegradable and compostable substance while maintaining the cushioning protection function through controlled particle properties and distribution

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite structure combining starch-based particles with paper-based webs and heat seal coating, forming a multi-layer padded mailer that integrates protective cushioning with recyclable materials to eliminate environmental harm

Inventive Principle:

Principle #40Composite materials

2Reliability

If traditional padding materials are used, then protection is provided, but material usage efficiency is low and production speed is limited

Engineering Contradiction:

ImproveprotectionVSAvoidproduction speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent replaces traditional mechanical padding application methods with a fluidized bed system that uses fluid dynamics to deposit starch-based particles, enabling continuous high-speed production while maintaining protective cushioning

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent utilizes the porous structure of starch-based particles to provide effective cushioning protection with reduced material density, allowing for more efficient material usage and faster production cycles

Inventive Principle:

Principle #31Porous materials

3Reliability

If plastic padding is used, then cushioning is achieved, but the padding is not biodegradable or compostable

Engineering Contradiction:

ImprovecushioningVSAvoidbiodegradability

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent changes the chemical composition parameter of the padding material from synthetic plastic to natural starch-based particles, enabling biodegradation and composting while preserving cushioning properties through optimized particle morphology and size distribution

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 starch-based padding system provides enhanced resilience, reduced material usage, and improved production speeds while ensuring the padded materials are curbside recyclable, biodegradable, and compostable, addressing the environmental concerns of traditional plastic padding.

Implementation Method 1

The apparatus may comprise at least a hopper and a vacuum-based placement devices, such as a wheel, belt, or other device. The hopper may store the starch-based particles after formation, and prior to adhesion, while, for example, the vacuum wheel may engage the starch-based particles, for example, via vacuum suction, to transfer the starch-based particles from the hopper to the first web.

Methodology Applied

Scientific EffectVacuum suction: Suction

Implementation Method 2

a first layer of heat seal coating disposed on the second surface of the first web... a second layer of heat seal coating disposed on the second surface of the second web

Methodology Applied

Scientific EffectHeat seal:

Data Source

PatentUS20240018725A1Starch-based padding for roll stock and padded mailers and method of making the same

Publication Date: 2024.01.18 GEORGIA PACIFIC CORRUGATED LLC

AI summary

Padded materials and corresponding systems and methods for forming the same are provided herein. A padded material comprises a first web of paper-based material defining a first and a second surface, and a second web of paper-based material defining a first and a second surface. A first layer of heat seal coating is disposed on the second surface of the first web, and a second layer of heat seal coating is disposed on the second surface of the second web. A starch-based padding is sandwiched between the first web and the second web such that the starch-based padding is positioned between the first surface of the first web and the second layer of heat seal coating disposed on the second surface of the second web. The padded material may be formed into a roll stock that is used in an automated packaging machine, such as an automated mailer formation device.