Recycled Plastic Display Assembly with Biodegradable Adhesives

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Solution Overview

Problem

The frequent replacement of information handling system components leads to significant waste, as traditional displays have a high environmental footprint due to non-recyclable materials, necessitating a sustainable and environmentally-friendly solution that maintains strength while increasing recyclable content.

Innovation Solution

The display assembly incorporates recycled and biodegradable plastics, adhesives, and metallic components, with a blend of polycarbonate and acrylonitrile butadiene styrene polymer, polyphenylene sulfide, and cyclo olefin polymers, along with a diffuser optical film and light guide plate layers, achieving high recyclable content without compromising strength through lamination with biodegradable adhesives and edge-bonding with ultrasound or laser fusion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If traditional non-recyclable materials are used in display assemblies, then structural strength and durability are maintained, but environmental footprint increases and recyclability decreases

Engineering Contradiction:

Improveenvironmental footprintVSAvoidstructural strength

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The patent employs composite materials by combining recycled plastics (such as recycled polycarbonate, recycled ABS, recycled PET) with biodegradable materials and bonding agents to create display assembly components that maintain structural strength while improving environmental sustainability and recyclability

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent changes the material composition parameters by specifying precise proportions of recycled content (e.g., at least 25% recycled plastic by weight, with some embodiments using 30-70% recycled content) and combining different material types to achieve both strength and sustainability goals

Inventive Principle:

Principle #35Parameter changes

2Loss of substance

If recycled plastic content is increased beyond 25%, then environmental sustainability improves, but material strength may be compromised

Engineering Contradiction:

Improverecyclable contentVSAvoidplastic strength

Core Design Contradiction:

Loss of substanceVSStrength

Solution Approach 1:

The patent uses composite materials by combining multiple types of recycled plastics (PC, ABS, PET) with biodegradable materials and bonding agents to create a multi-material system that maintains structural strength even with high recycled content (30-70% or more)

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent merges different recycled plastic materials and biodegradable materials into integrated components, using bonding agents to join these materials together to achieve both high recyclability and sufficient mechanical strength

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If frequent component replacement occurs to meet information handling needs, then system adaptability and performance are improved, but waste generation and environmental pollution increase

Engineering Contradiction:

Improvesystem adaptabilityVSAvoidwaste generation

Core Design Contradiction:

Adaptability or versatilityVSLoss of substance

Solution Approach 1:

The patent implements discarding and recovering by designing display assemblies with high recycled content (25% or more recyclable materials) that can be easily disassembled and recovered at end-of-life, reducing waste from frequent component replacement while maintaining system adaptability

Inventive Principle:

Principle #34Discarding and recovering

Solution Approach 2:

The patent converts the harm of frequent replacement waste into benefit by using recyclable materials that can be recovered and reused, turning the disposal problem into a resource recovery opportunity that supports sustainable manufacturing cycles

Inventive Principle:

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

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

This approach enhances the recyclable content of display assemblies beyond 25% while maintaining structural integrity, reducing environmental impact by using sustainable materials that are recyclable and biodegradable, thus addressing the issue of plastic pollution and promoting sustainable practices.

Implementation Method 1

edge-bonded with ultrasound or laser fusion

Methodology Applied

Scientific EffectUltrasound: Ultrasound

Implementation Method 2

edge-bonded with ultrasound or laser fusion

Methodology Applied

Scientific EffectLaser fusion: Laser Beam Welding

Data Source

PatentUS11628661B2Display assembly with recycled content for an information handling system

Publication Date: 2023.04.18 DELL PROD LP

AI summary

An increase in the amount of recycled plastic used in a display assembly can be obtained by introducing other types of plastic material that allow increasing the recyclable content beyond 25% without significantly lowering the strength properties of the plastic. The recycled plastic materials may be assembled together with a bio-based material. One example display assembly with higher recycled plastic content while maintaining sufficient plastic strength is an assembly having an external frame having 70% recycled PC ABS mixed with 30% fresh PPS (Polyphenylene Sulfide), a diffuser optical film having 60-80% recycled PET mixed with fresh PET, and a light guide path (e.g., plate) having 70% recycled PC mixed with fresh COP (Cyclo Olefin Polymers). The stiffness strength of the display assembly may further be improved by laminating the display assembly with biodegradable adhesives and/or edge-bonded with ultrasound or laser fusion.