Chlorine-Resistant Blood Analyzer Washing Solution Container

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Solution Overview

Problem

Existing washing solution containers for blood analyzers, sealed with rubber lids, deteriorate when exposed to sodium hypochlorite solutions, leading to permeation of CO2 and reduction in detergency due to decomposition of the washing solution.

Innovation Solution

A container with a thermoplastic resin body resistant to chlorine-based solutions, sealed with a multilayer film that includes a gas barrier layer to prevent CO2 permeation, and a bar code for identification, allowing for automatic aspiration and washing of the blood analyzer's flow system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a rubber lid member is used to seal the washing solution container, then the container can be easily sealed and opened, but the rubber deteriorates when exposed to sodium hypochlorite solution, leading to CO2 permeation and reduced detergency

Engineering Contradiction:

Improvesealing operationVSAvoidsealing reliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent applies composite materials by using a multilayer film structure consisting of a resin layer and a foil layer bonded together. The resin layer provides heat-sealability and chemical resistance to sodium hypochlorite, while the foil layer provides gas barrier properties to prevent CO2 permeation. This composite structure resolves the contradiction by combining materials with complementary properties that neither could achieve alone.

Inventive Principle:

Principle #40Composite materials

2Device complexity

If a single-layer resin film is used to seal the container, then the sealing process is simple, but the film cannot prevent CO2 permeation effectively

Engineering Contradiction:

Improvesealing structureVSAvoidCO2 permeation

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent uses a composite multilayer film structure where a resin layer is bonded to a foil layer. The resin layer provides heat-sealability and chemical resistance, while the foil layer provides excellent gas barrier properties to prevent CO2 permeation. This composite approach maintains relative simplicity while effectively blocking harmful CO2 permeation.

Inventive Principle:

Principle #40Composite materials

3Stability of the object's composition

If the container is sealed with a material resistant to chlorine-based solutions, then the washing solution stability is improved, but the sealing material must also prevent CO2 permeation to maintain long-term detergency

Engineering Contradiction:

Improvewashing solution stabilityVSAvoidCO2 permeation

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The patent employs a composite multilayer film where the resin layer provides chemical resistance to stabilize the washing solution, and the foil layer provides gas barrier properties to prevent CO2 permeation. This composite structure simultaneously addresses both requirements: stabilizing the chlorine-based washing solution and preventing CO2-induced decomposition.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The sealing function is segmented into two distinct layers: the resin layer handles chemical resistance and heat sealing, while the foil layer handles gas barrier functionality. This segmentation allows each layer to specialize in one function, achieving both washing solution stability and CO2 permeation prevention effectively.

Inventive Principle:

Principle #1Segmentation

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 solution effectively prevents deterioration of the washing solution, maintains its detergency over long periods, and enables automatic handling and identification, ensuring reliable operation of the blood analyzer.

Implementation Method 1

a seal layer heat-sealed to the container body thereby sealing the opening

Methodology Applied

Scientific EffectHeat sealing:

Implementation Method 2

a gas barrier layer arranged on the outer side of the seal layer

Methodology Applied

Scientific EffectGas barrier: Permeation

Data Source

PatentUS11253863B2Container storing washing solution used for blood analyzer

Publication Date: 2022.02.22 SYSMEX CORP

AI summary

This container storing a washing solution for a blood analyzer includes a container body made of thermoplastic resin resistant against a chlorine-based washing solution and provided with an opening on an upper portion, a chlorine-based washing solution stored in the container body, and a multilayer film covering the opening. The multilayer film includes a seal layer heat-sealed to the container body thereby blocking the opening and a gas barrier layer arranged on the outer side of the seal layer.