Spray Can Absorbing Body for Leakage Prevention
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Solution Overview
Problem
Existing spray can products face issues with liquid leakage and safety when used in tilted or inverted positions, particularly when filled with flammable liquefied gases, due to the difficulty in maintaining a stable mixture of propellants and the complexity of manufacturing processes, which increases costs and reduces workability and productivity.
Innovation Solution
A spray can product design featuring a cellulose fiber absorbing body compressed into a block-like configuration with a lid-like member providing a gas-permeable seal, preventing liquid leakage and ensuring safety, while using a flammable liquefied gas like dimethyl ether (DME) that does not deplete the ozone layer and has a low global warming potential, and manufacturing methods that simplify the filling process and reduce production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a flammable liquefied gas is used as propellant to achieve eco-friendly characteristics (low ozone-depleting potential and low global warming potential), then environmental compatibility is improved, but safety deteriorates due to flammability and risk of liquid leakage
Solution Approach 1:
The patent employs a porous absorbing body made of cellulose fibers to retain the flammable liquefied gas. The porous structure allows the gas to be absorbed and held while preventing liquid leakage, thus maintaining safety without compromising the eco-friendly propellant characteristics
Solution Approach 2:
The absorbing body acts as an intermediary between the flammable liquefied gas and the external environment. It prevents direct contact between the gas and potential ignition sources while allowing controlled release, thereby ensuring safety while preserving the environmental benefits
2Reliability
If the absorbing body is filled with cellulose fibers to prevent liquid leakage, then safety is improved, but manufacturing complexity increases due to the need for compression and lid-like member installation
Solution Approach 1:
The absorbing body is pre-compressed into a block-like configuration before installation in the spray can. This preliminary compression simplifies the subsequent assembly process by reducing the volume and stabilizing the shape of the absorbing body, making it easier to handle and install
Solution Approach 2:
The patent divides the absorbing body into a compressed block-like structure that can be separately installed, and uses a lid-like member as a separate component. This segmentation allows for simpler manufacturing and assembly processes, reducing overall device complexity while maintaining leakage prevention
3Productivity
If the absorbing body is compressed into a block-like configuration to improve liquid retention, then productivity is improved, but manufacturing precision requirements increase due to the need for precise compression and fitting
Solution Approach 1:
The patent changes the physical state of the absorbing body from loose cellulose fibers to a compressed block-like configuration. This parameter change (compression) improves liquid retention and productivity while the block shape simplifies fitting requirements, reducing the need for high manufacturing precision
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 liquid leakage and enhances safety when using flammable liquefied gases, improves liquid retention, and reduces production costs by simplifying the manufacturing process, allowing for efficient and safe operation of spray can products in various applications, including dust blowers and torch burners.
Implementation Method 1
an absorbing body for retaining liquid... composed of an assembly of cellulose fibers... the absorbing body compressed into a block-like configuration
Implementation Method 2
a lid-like member provided between the space and the absorbing body so as to protect a surface of the absorbing body in a gas permeable manner
Data Source
AI summary
A spray can product capable of preventing leakage where used or stored in a tilted or an inverted position, and keeping good safety and liquid retention even where a flammable liquefied gas is used. The spray can product is formed by filling a spray can having an ejection opening with a liquefied gas and an absorbing body for retaining liquid, and the absorbing body is composed of an assembly of cellulose fibers containing at least 45 mass % of fine cellulose fibers having a fiber length of 0.35 mm or less. The absorbing body compressed into a block-shaped configuration corresponding to that of the spray can is accommodated within the spray can while defining a space on the side of an ejection opening, and a lid-like member is provided between the space and the absorbing body to protect a surface of the absorbing body in a gas permeable manner.