Polyolefin Barrier Layer Composition for Clear, Strong Packaging

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Solution Overview

Problem

Current polymeric materials used in packaging often have limited recycle value, affect aesthetic and mechanical properties, and do not effectively serve as barriers for both water vapor and gases, leading to inefficient waste streams.

Innovation Solution

A polymeric substrate comprising at least 50 wt.% polyolefin polymer and up to 50 wt.% hydrocarbon resin, with a thickness of 200 μm to 6,500 μm, exhibiting a DTUL of 30° C. or more and a tensile modulus of 1,000 MPa or more, providing improved barrier properties and mechanical strength.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If techniques or treatments are employed to provide a polymeric material that serves as an effective barrier for both water vapor and gases, then barrier performance is improved, but aesthetic properties (clarity) and mechanical properties are adversely affected

Engineering Contradiction:

Improvebarrier performanceVSAvoidmechanical properties

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent employs a composite material system consisting of a polyolefin polymer matrix combined with a hydrocarbon resin dispersion. This composite structure allows the polyolefin to provide mechanical strength and the hydrocarbon resin to provide barrier properties against water vapor and gases, thereby achieving effective barrier performance without compromising mechanical properties or aesthetic clarity.

Inventive Principle:

Principle #40Composite materials

2Reliability

Engineering Contradiction:

Improvebarrier performanceVSAvoidaesthetic properties (clarity)

Core Design Contradiction:

ReliabilityVSIllumination intensity

Solution Approach 1:

The patent applies local quality by creating a heterogeneous structure where the hydrocarbon resin is dispersed as fine particles throughout the polyolefin matrix. This dispersion approach ensures that barrier properties are enhanced at the molecular level while maintaining overall optical clarity, as the resin particles are distributed uniformly and do not aggregate to scatter light.

Inventive Principle:

Principle #3Local quality

3Adaptability or versatility

If polymeric materials are used to replace historical packaging materials, then flexibility and cost are improved, but recycle value is limited

Engineering Contradiction:

ImproveflexibilityVSAvoidrecycle value

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent changes the compositional parameters of the polymeric material by using a specific combination of polyolefin polymer and hydrocarbon resin in controlled ratios. This parameter optimization allows the material to maintain flexibility for modern packaging applications while improving recyclability through careful selection of compatible components that can be processed together without degrading performance.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12600846B2Polymeric substrate including a barrier layer

Publication Date: 2026.04.14 INV POLYPROPYLENE LLC

AI summary

A polymeric substrate is disclosed. The polymeric substrate comprises a barrier layer including a polymeric material comprising about 50 wt. % or more of at least one polyolefin polymer and 50 wt. % or less of a hydrocarbon resin. The polymeric material exhibits a DTUL of 30° C. or more and a tensile modulus of 500 MPa or more and/or a flexural secant modulus of 500 MPa or more. The barrier layer has a thickness of greater than 200 μm to 6,500 μm. A shaped polymeric article comprising the polymeric substrate is also disclosed.