Lightweight Polystyrene Panel with Cellular Core

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Solution Overview

Problem

Current furniture materials like fibreboard and oriented strand board are not weatherproof, difficult to recycle, and require adhesives and secondary processes for surface finishing, while solid polystyrene and high impact polystyrene boards over 11 mm in thickness are heavy and not commercially available, posing environmental and practical challenges.

Innovation Solution

A moulded panel with a continuous, solid outer skin and a cellular core structure, using recycled PS or HIPS, with reinforcement members and incorporating anti-fungal, anti-bacterial, or fire retardant agents, produced through a static moulding process that encapsulates a heat-activated foamable plastic core, allowing for precise dimensions and reduced weight.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If solid polystyrene sheets are produced to achieve desired thickness, then the panel provides structural strength, but the panel becomes very heavy and unsuitable for furniture applications

Engineering Contradiction:

Improvestructural strengthVSAvoidpanel weight

Core Design Contradiction:

StrengthVSWeight of moving object

Solution Approach 1:

The panel is segmented into two distinct structural zones: a solid outer skin providing strength and a cellular core providing lightweight support. This segmentation allows each zone to optimize its function independently, achieving structural integrity without excessive weight.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The panel uses a composite structure combining solid polystyrene skin with cellular polystyrene core. This composite approach merges the high strength-to-weight ratio of solid material with the lightweight properties of cellular material, resolving the contradiction between strength and weight.

Inventive Principle:

Principle #40Composite materials

2Shape

If fibreboard and oriented strand board are used to achieve desired surface finish, then the panel provides aesthetic appearance, but the panel requires adhesives and secondary processes and is difficult to recycle

Engineering Contradiction:

Improvesurface finishVSAvoidmanufacturing simplicity

Core Design Contradiction:

ShapeVSEase of manufacture

Solution Approach 1:

The panel merges the structural core formation and surface finish creation into a single integrated moulding process. The skin is formed simultaneously with the core structure, eliminating separate lamination or veneering steps and reducing adhesive requirements.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The panel is designed to be fully recyclable at end-of-life, allowing recovery and reuse of the polystyrene material. This contrasts with adhesive-bonded composite boards that are difficult to recycle, addressing the ease of manufacture and environmental sustainability.

Inventive Principle:

Principle #34Discarding and recovering

3Shape

If fibreboard and oriented strand board are used to achieve desired surface finish, then the panel provides aesthetic appearance, but the panel is not resistant to moisture and requires painting or lamination

Engineering Contradiction:

Improvesurface finishVSAvoidmoisture resistance

Core Design Contradiction:

ShapeVSReliability

Solution Approach 1:

The panel uses polystyrene material with fundamentally different moisture resistance properties compared to fibreboard. By changing the material parameter from cellulose-based fibreboard to hydrophobic polystyrene, the panel achieves inherent moisture resistance without requiring protective coatings.

Inventive Principle:

Principle #35Parameter changes

4Strength

If solid polystyrene board of over 11 mm thickness is produced, then the panel provides structural strength, but the panel becomes very heavy and expensive

Engineering Contradiction:

Improvestructural strengthVSAvoidpanel weight

Core Design Contradiction:

StrengthVSWeight of stationary object

Solution Approach 1:

The panel applies different material densities to different regions: solid material where strength is needed (outer skin) and cellular material where weight reduction is prioritized (core). This local quality differentiation achieves structural strength without uniform weight increase throughout the entire panel.

Inventive Principle:

Principle #3Local quality

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 a lightweight, moisture-proof, and scratch-resistant panel that eliminates the need for secondary processes, is environmentally friendly, and can be recycled, offering improved performance over existing materials by integrating desired surface finishes and reinforcement for enhanced strength and stiffness.

Implementation Method 1

a cellular core formed from a heat-activated foamable plastic particulate material

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Implementation Method 2

The skin is formed from a plastic particulate material applied directly to the surface of a heated mould

Methodology Applied

Scientific EffectMelting: Melting

Data Source

PatentEP2807027B1Large format polystyrene panel

Publication Date: 2024.04.10 UPCYCLE HLDG

Figure 1~5
Figure 2~4

AI summary

A panel (10) for use in furniture and interior design applications comprises a continuous outer skin (12) formed of polystyrene or high impact polystyrene. The skin (12) completely encapsulates a cellular plastic core (14). The core (14) is formed from a heat activated foamable plastic particulate material. The area of the largest face of the panel is greater than 1m2. Both skin and filler material may comprise recycled plastics.