Furan-Based Polyester Composition for Strength–Deformability Balance

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Solution Overview

Problem

Existing polymer materials face challenges in achieving a balance between toughness and deformability while maintaining high tensile strength and tensile modulus, particularly in the production of packaging films and moulded articles, with issues such as mould shrinkage during cooling.

Innovation Solution

A polyester composition is developed with specific monomer ratios, including 2,5-furandicarboxylic acid and aliphatic dicarboxylic acids, along with 1,2-ethanediol and unsaturated aliphatic diols, to enhance mechanical properties and gas barrier performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If conventional polymer materials are used to achieve high tensile strength, then mechanical strength is improved, but deformability and toughness deteriorate

Engineering Contradiction:

Improvetensile strengthVSAvoiddeformability

Core Design Contradiction:

StrengthVSAdaptability or versatility

Solution Approach 1:

The patent employs composite materials by combining multiple polymer components with different properties: a polyester component providing tensile strength and barrier properties, and a polyolefin component providing deformability and toughness. This composite approach allows the material to simultaneously achieve high tensile strength (improving_feature) and good deformability (worsening_feature), as each component contributes its advantageous properties to the final product.

Inventive Principle:

Principle #40Composite materials

2Productivity

If polymer materials are used to ensure high productivity, then manufacturing efficiency is improved, but mould shrinkage during cooling increases

Engineering Contradiction:

Improvemanufacturing efficiencyVSAvoidmould shrinkage

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent applies parameter changes by adjusting the compositional parameters of the polymer material, specifically the ratio and type of polyester to polyolefin components. By optimizing these compositional parameters, the material exhibits improved cooling characteristics during moulding that reduce mould shrinkage (worsening_feature), while maintaining high productivity (improving_feature) through efficient processing behavior.

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If polyester composition is used to achieve high barrier properties against oxygen and carbon dioxide, then gas barrier performance is improved, but workability properties may deteriorate

Engineering Contradiction:

Improvegas barrier propertiesVSAvoidworkability properties

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent uses composite materials where the polyester component (providing gas barrier properties against oxygen and carbon dioxide) is combined with a polyolefin component (providing workability). This composite structure allows the material to achieve high barrier properties (improving_feature) while maintaining good workability properties (worsening_feature), as the polyolefin component compensates for any processing difficulties introduced by the barrier-providing polyester.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS20250326888A1New polyester and compositions containing it

Publication Date: 2025.10.23 NOVAMONT SPA

AI summary

This invention relates to a new polyester which is particularly suitable for use in the manufacture of mass-produced articles characterised by excellent mechanical properties. in particular high tensile strength and tensile modulus, associated with a high barrier property against oxygen and carbon dioxide.