Cellulose Ester-Sheathed Lines for Strength and Biodegradability

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Solution Overview

Problem

Existing synthetic elongated line devices, such as fishing lines and trimmer lines, face issues with durability, strength, and biodegradability, leading to environmental pollution and hazards due to non-degradable polymer fragments.

Innovation Solution

The elongated line devices are composed of a core made from high molecular weight strain hardened polymers like polyphenylene terephthalamide and a sheath of cellulose esters, with optional outer layers, providing enhanced strength and biodegradability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If traditional synthetic polymers like nylon are used in elongated line devices, then strength and durability are improved, but biodegradability deteriorates

Engineering Contradiction:

ImprovestrengthVSAvoidbiodegradability

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent employs composite materials by combining biobased polymers (such as polylactic acid, polyhydroxyalkanoates, or cellulose acetate) with traditional synthetic polymers (such as nylon or polyethylene) in a layered structure. The biobased polymer layer provides biodegradability while the synthetic polymer layer maintains strength and durability. This composite approach resolves the contradiction by integrating materials with complementary properties into a single functional construct.

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If biobased polymers are used in synthetic elongated line devices, then biodegradability is improved, but strength and durability deteriorate

Engineering Contradiction:

ImprovebiodegradabilityVSAvoidstrength

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The patent uses composite materials where biobased polymers are combined with traditional synthetic polymers in a layered structure. The synthetic polymer component provides the necessary strength and durability, while the biobased polymer component ensures biodegradability. This composite strategy allows the device to meet both mechanical performance requirements and environmental degradation requirements simultaneously.

Inventive Principle:

Principle #40Composite materials

3Duration of action of stationary object

If non-degradable polymer materials are used, then durability is improved, but environmental pollution worsens

Engineering Contradiction:

ImprovedurabilityVSAvoidenvironmental pollution

Core Design Contradiction:

Duration of action of stationary objectVSObject-generated harmful factors

Solution Approach 1:

The patent segments the elongated line device into multiple functional layers with distinct roles. The outer layer or core layer contains traditional synthetic polymers that provide durability during use, while the outer surface layer or coating contains biobased polymers that enable environmental degradation after use. This segmentation allows the device to exhibit different properties at different stages of its lifecycle - durable during operation, degradable after disposal.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs composite materials combining degradable and non-degradable polymer components in a layered structure. The non-degradable synthetic polymer layer maintains structural integrity and durability during the service life of the device, while the degradable biobased polymer layer ensures that after the device is discarded, it can break down in the environment, thereby reducing environmental pollution from persistent plastic waste.

Inventive Principle:

Principle #40Composite materials

4Ease of manufacture

If traditional synthetic materials are used, then manufacturing simplicity is improved, but environmental compatibility deteriorates

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidenvironmental compatibility

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent uses composite materials where traditional synthetic polymers are combined with biobased polymers in a layered structure. The manufacturing process leverages existing extrusion and coating technologies to create this composite structure, maintaining relative simplicity while incorporating environmentally friendly materials. The biobased polymer layer can be applied as a coating or extruded as a separate layer, utilizing conventional manufacturing equipment with minimal process modification.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS20250327214A1Composition and Elongated Line Device Useful for Various Devices Such as Trimmer Lines, Fishing Lines and the Like

Publication Date: 2025.10.23 GARCIA JR ARNALDO R

AI summary

An elongated line device that includes an elongated core and a sheath surrounding and connected to the elongated core. The elongated core includes a polymer selected from the group consisting of a high molecular weight strain hardened polymeric matrix, a cellulose-derived fiber matrix and mixtures thereof. The sheath includes an amorphous polymeric matrix comprising cellulous ester and at least one plasticizer.