Liquid Crystalline Polymer Composition for Better Film Processability

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Solution Overview

Problem

Liquid crystalline polymers face limitations in melt strength and processing temperature window, leading to poor tear strength and processability in film making and assembly processes.

Innovation Solution

A composition comprising 55-99.5% liquid crystalline polymer, 0.5-45% thermoplastic polymer (polyetherimide, polyarylate, or poly(arylene ether-sulfone), and 1-60 parts by weight of a compatibilizer (polyepoxy compound or poly(ester-carbonate), combined through melt-mixing and optionally extrusion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If liquid crystalline polymer is used to achieve desirable barrier properties and stability, then oxygen and moisture barrier is improved, but melt strength and processing temperature window deteriorate

Engineering Contradiction:

Improvebarrier propertyVSAvoidprocessability

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent combines liquid crystalline polymer with thermoplastic polymer (polyetherimide, polyarylate, or poly(arylene ether-sulfone)) and compatibilizer to create a composite material system. This composite approach allows the liquid crystalline polymer to maintain its desirable barrier properties and stability while the thermoplastic component improves melt strength and processing characteristics, resolving the contradiction between reliability and ease of manufacture.

Inventive Principle:

Principle #40Composite materials

2Reliability

If liquid crystalline polymer is used to achieve stability and dielectric properties, then circuit board application performance is improved, but tear strength in machine direction deteriorates

Engineering Contradiction:

Improvedielectric propertyVSAvoidtear strength

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The composite material system combines liquid crystalline polymer with thermoplastic polymer and compatibilizer. The thermoplastic component contributes to improving tear strength in the machine direction while the liquid crystalline polymer maintains its stable dielectric properties, thus resolving the contradiction between reliability and strength.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The compatibilizer acts as an intermediary substance that facilitates better interfacial adhesion between the liquid crystalline polymer and thermoplastic polymer phases. This mediator improves the overall composite structure and enhances tear strength while preserving the dielectric properties of the liquid crystalline polymer.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If liquid crystalline polymer is used to achieve barrier properties, then packaging application effectiveness is improved, but yield during film making deteriorates

Engineering Contradiction:

Improvebarrier propertyVSAvoidyield

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The composite material system with thermoplastic polymer and compatibilizer improves the processability and yield during film making while maintaining the barrier properties of the liquid crystalline polymer. The thermoplastic component provides better melt strength and processing window, reducing losses during film production.

Inventive Principle:

Principle #40Composite materials

4Reliability

If liquid crystalline polymer is used to achieve desirable combination of properties, then application effectiveness is improved, but processing temperature window deteriorates

Engineering Contradiction:

Improvecombination of propertiesVSAvoidprocessing temperature window

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The composite material system combines liquid crystalline polymer with thermoplastic polymer and compatibilizer. The thermoplastic component broadens the processing temperature window and improves melt strength, allowing for better processing while the liquid crystalline polymer maintains its desirable combination of barrier, stability, and dielectric properties.

Inventive Principle:

Principle #40Composite materials

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 composition achieves improved melt strength and processing temperature window, enhancing the properties of films derived from liquid crystalline polymers.

Implementation Method 1

a method of making the composition, the method comprising melt-mixing the components of the composition

Methodology Applied

Scientific EffectMelt-mixing:

Data Source

PatentUS12577468B2Thermoplastic compositions and uses thereof

Publication Date: 2026.03.17 SHPP GLOBAL TECH BV

AI summary

A composition includes particular amounts of a liquid crystalline polymer; a thermoplastic polymer including a polyetherimide, a polyarylate, or a poly(arylene ether-sulfone); and a compatibilizer including a polyepoxy compound or a poly(ester-carbonate). Methods for the manufacture of the compositions and articles including the composition are also provided.