Decorative Thermoplastic Laminate With Heat-Resistant Polyester Blend

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Solution Overview

Problem

Current glass substitutes for glazing, such as polyvinyl chloride and polycarbonate, lack decorative capabilities and have limitations in creep/thermal resistance, processing difficulties, and safety concerns, while polyester thermosetting resins face challenges with air bubble removal and brittleness.

Innovation Solution

A thermoplastic article is produced by applying heat and pressure to a laminate comprising an upper sheet material, a decorative material, and a lower sheet material, using a polyester/aromatic polycarbonate blend with specific compositions of terephthalic acid, 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and 1,4-cyclohexanedimethanol, which enhances heat deflection temperature, stiffness, and creep resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If glass is used as glazing material, then transparency and decorative capability are achieved, but weight, brittleness, and safety hazards increase

Engineering Contradiction:

ImprovetransparencyVSAvoidsafety hazard

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the material parameters from glass to thermoplastic polyester composition, fundamentally altering the physical properties to eliminate brittleness and safety hazards while maintaining transparency through controlled composition ratios and processing conditions

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses a composite material system combining thermoplastic polyester with specific glycol components (1,4-cyclohexanedimethanol and 2,2,4,4-tetramethyl-1,3-cyclobutanediol) to achieve a balance of optical clarity, mechanical strength, and safety properties that glass alone cannot provide

Inventive Principle:

Principle #40Composite materials

2Illumination intensity

If polyester thermosetting resins are used, then decorative capability is achieved, but air bubble removal difficulty and brittleness increase

Engineering Contradiction:

Improvedecorative capabilityVSAvoidair bubble removal

Core Design Contradiction:

Illumination intensityVSEase of manufacture

Solution Approach 1:

The patent changes the chemical state from thermosetting to thermoplastic, which fundamentally alters the processing behavior to eliminate air trapping issues while maintaining decorative capabilities through the laminate structure

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses a thermoplastic material that can be easily reprocessed and molded without the curing constraints of thermosetting resins, allowing for easier manufacturing and defect correction

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Object-affected harmful factors

If polycarbonate is used as glass substitute, then safety and impact resistance are improved, but processing complexity and cost increase due to drying requirements

Engineering Contradiction:

ImprovesafetyVSAvoidprocessing complexity

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent changes the material composition to a polyester-based system with specific glycol ratios that eliminates the moisture sensitivity and drying requirements of polycarbonate, simplifying processing while maintaining safety properties

Inventive Principle:

Principle #35Parameter changes

4Temperature

If higher heat deflection temperature and creep resistance are achieved through material composition, then thermal resistance improves, but manufacturing complexity increases

Engineering Contradiction:

Improveheat deflection temperatureVSAvoidmanufacturing complexity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The patent achieves high heat deflection temperature and creep resistance by optimizing the glycol component ratios in the polyester composition, specifically using 1,4-cyclohexanedimethanol and 2,2,4,4-tetramethyl-1,3-cyclobutanediol in controlled amounts, rather than through complex multi-step manufacturing processes

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 solution provides a decorative thermoplastic article with improved heat deflection temperature, stiffness, and creep resistance, addressing the limitations of existing glass substitutes and polyester thermosetting resins, while enabling easier processing and safety.

Implementation Method 1

applying heat and pressure to a laminate comprising, in order: an upper sheet material, at least one decorative material, for example, a fabric, metallic wire, paper, or printed layer, and a lower sheet material to produce a thermoplastic article having the decorative materials embedded therein

Methodology Applied

Scientific EffectMelting: Melting

Data Source

PatentUS7740941B2Thermoplastic articles comprising cyclobutanediol having a decorative material embedded therein

Publication Date: 2010.06.22 EASTMAN CHEM CO

AI summary

This invention relates to thermoplastic article having one or more decorative materials embedded therein which is obtained by applying heat and pressure to one or more laminates wherein at least one of said laminates comprises, in order, (1) an upper sheet material; (2) one or more decorative materials; and (3) a lower sheet material; wherein the upper and lower sheet materials are formed from a polyester/aromatic polycarbonate blend wherein the thermoplastic article comprises at least one polyester composition comprising at least one polyester which comprises terephthalic acid and 2,2,4,4-tetramethyl-1,3-cyclobutanediol.