Nested Sachet Packaging for Controlled Chemical Dosing
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Solution Overview
Problem
Existing packaging systems for chemical agents, particularly those with corrosive, oxidizing, or acidic properties, face challenges in maintaining the integrity of the agents during storage and shipping, and in providing easy and controlled dispensing, often leading to degradation or improper application.
Innovation Solution
A packaging system comprising an outer package with specific gas and moisture barrier properties and an inner degradable package that maintains a non-degrading environment for the chemical agent, allowing for controlled dispensing without direct handling or measurement, and includes a tear-promoting feature for easy opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical agents are packaged in large rigid and flexible polymer containers, then the chemical agents are protected during storage and shipping, but the containers are expensive and difficult to dispense from
Solution Approach 1:
The packaging system divides the chemical agent into multiple separate sachets, each containing a controlled dosage. This segmentation allows using smaller, cheaper flexible packaging instead of expensive large rigid containers, while maintaining protection through the outer bag structure.
Solution Approach 2:
The patent uses a nested packaging structure where inner sachets containing chemical agents are placed inside an outer flexible bag. This nested arrangement provides protection during storage and shipping while allowing easy dispensing of individual sachets, resolving the contradiction between protection and ease of use.
2Reliability
If chemical agents are packaged in large containers, then the chemical agents are protected during storage and shipping, but controlled dispensing is difficult and leads to over or under application
Solution Approach 1:
By dividing the chemical agent into pre-measured separate sachets, the system eliminates the need for manual measuring and dosing. Each sachet provides a controlled amount, ensuring proper application while maintaining protection through the outer bag during storage and shipping.
Solution Approach 2:
The chemical agents are pre-packaged in sachets with controlled dosages before reaching the consumer. This preliminary action of pre-measuring and pre-packaging ensures accurate dosing and eliminates the need for consumers to perform measuring operations, resolving the dispensing control issue.
3Ease of operation
If flexible packages are used for chemical agents, then dispensing is easier, but the packages may rupture during storage and transportation
Solution Approach 1:
The patent places multiple inner sachets inside an outer flexible bag, creating a nested structure. The outer bag provides structural support and protection during storage and transportation, while the inner sachets remain easily dispensable. This nested arrangement resolves the contradiction between flexibility for easy dispensing and structural integrity for protection.
Solution Approach 2:
The outer flexible bag acts as a protective cushion for the inner sachets during storage and transportation. This beforehand protection prevents rupture of the inner packages while maintaining the flexibility and ease of dispensing characteristics of the overall package system.
4Measurement precision
If measured amounts of chemical agents are dispensed manually, then controlled dosing is possible, but spills and application errors occur
Solution Approach 1:
The chemical agent is divided into separate pre-measured sachets, eliminating manual measuring operations. Each sachet contains a precise controlled dosage, ensuring measurement precision while preventing spills and application errors through the sealed sachet design.
Solution Approach 2:
The patent uses disposable sealed sachets for each chemical agent portion. These single-use packages ensure precise dosing through factory sealing and pre-measuring, eliminating the risks of spills and application errors associated with manual handling and measuring operations.
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 system effectively protects chemical agents from environmental exposure, prevents application errors, reduces packaging material needs, and lowers transportation costs while ensuring measured and safe dispensing of chemical agents.
Implementation Method 1
The first film and the second film have a moisture or water vapor transmission rate of less than 7.75 g/m 2
Implementation Method 2
The inner package is degradable when exposed to water as a degrading agent
Data Source
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Figure 3
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AI summary
A package system is disclosed for dispensing controlled amounts of a chemical agent. The package system includes an outer package that is generally gas and liquid impermeable. The outer package contains an inner package made from a degradable material, such as a material that is water degradable. The inner package contains a measured amount of a chemical agent. The chemical agent may be difficult to handle and may have corrosive properties, may be an oxidizer, or the like. The package system facilitates dispensing the chemical agent into a particular environment. In one embodiment, the package system is designed to hold a chemical agent for treating recreational water sources, such as swimming pools.