Single-Layer Biodegradable Article With Water Barrier and Enzyme Activity

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Solution Overview

Problem

Existing biodegradable plastic articles lack water barrier properties necessary for food packaging applications without compromising the activity of enzymes that break down the polymers and are difficult to improve in a simple, cost-effective manner.

Innovation Solution

A biodegradable single-layer article composed of 3% to 60% PHA, a biodegradable polyester different from PHA, at least 0.001% enzymes capable of breaking down the polyester, and optionally a complementary thermoplastic polymer, which enhances water barrier properties while maintaining biodegradability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If the water barrier property is improved by modifying the polymer composition, then the water barrier property is improved, but the enzyme activity for breaking down the biodegradable polyester may be impaired

Engineering Contradiction:

Improvewater barrier propertyVSAvoidenzyme activity

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent uses a composite polymer system comprising PHA (polyhydroxyalkanoate) and a biodegradable polyester (such as PLA, PBAT, or PBS) to achieve both water barrier properties and enzyme degradability. The PHA component provides water barrier functionality while the biodegradable polyester component remains targeted by specific enzymes, allowing the composite material to simultaneously satisfy both requirements without compromising enzyme activity.

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If the composition is simplified to maintain cost-effectiveness, then the manufacturing cost is reduced, but achieving both water barrier properties and biodegradability becomes more difficult

Engineering Contradiction:

Improvecost-effectivenessVSAvoidwater barrier property

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent optimizes the compositional parameters by specifying PHA content at 3-60% by weight and enzyme content at 0.001-10% by weight, creating a cost-effective formulation that achieves water barrier properties without requiring complex multi-layer structures or expensive additives. This parameter optimization allows simple single-layer processing while maintaining both water barrier functionality and biodegradability.

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 composition achieves improved water barrier properties in biodegradable plastic articles without impairing enzyme activity, ensuring effective biodegradation and flexibility or rigidity as required.

Implementation Method 1

the simple and cost-effective improvement of the water barrier property of an enzyme-containing biodegradable article

Methodology Applied

Scientific EffectWater barrier property: Permeation

Implementation Method 2

at least 0.001% enzymes capable of breaking down said degradable polyester (b)

Methodology Applied

Scientific EffectEnzymatic degradation: Enzyme

Implementation Method 3

enzymes capable of breaking down the polymers of which it is composed

Methodology Applied

Scientific EffectHydrolysis: Hydrolysis

Data Source

PatentUS20260085163A1Enzyme-containing single-layer article having water barrier properties

Publication Date: 2026.03.26 CARBIOLICE

AI summary

The present invention relates to an enzyme-containing biodegradable single-layer article having water barrier properties.