Single-Dose Package Adsorbent Retention via Surface Resistivity
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Solution Overview
Problem
Single-dose packages containing internal adsorbents, such as spherical activated carbon, often face issues where the adsorbent is trapped in the heat-sealed region or spills out when opened due to inadequate heat-sealing and adhesion properties, leading to packaging failures and quality loss.
Innovation Solution
The use of a packaging material with a mean specific surface resistivity of 4.4×10^9Ω to 1.0×10^16Ω at its internal surface, combined with a spherical activated carbon having a surface electric charge of 0.028 to 0.707 μC/g, ensures the adsorbent is not trapped and minimizes spillage upon opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heat-sealing is performed to seal the package, then sealing reliability is improved, but internal adsorbent becomes trapped in the heat-sealed region
Solution Approach 1:
The packaging material's internal surface is designed with specific electrostatic properties (surface resistivity of 4.4×10^9Ω to 1.0×10^16Ω) only in the regions where adsorbent contact occurs, while maintaining standard heat-sealing properties in the sealing regions. This localized functional differentiation allows the adsorbent to be electrostatically repelled from heat-sealed areas, preventing entrapment without compromising seal integrity.
2Reliability
If packaging material has high adhesion to hold adsorbent, then adsorbent retention is improved, but adsorbent spills out on opening due to attachment around open region
Solution Approach 1:
Instead of using high adhesion to prevent spillage, the invention inverts the approach by using electrostatic repulsion. The packaging material's internal surface has controlled surface resistivity that creates electrostatic repulsion forces, pushing the adsorbent away from the open region and preventing spillage without requiring strong adhesion that would cause attachment during opening.
3Manufacturing precision
If packaging material surface resistivity is low to reduce static charge, then adsorbent adhesion is improved, but adsorbent becomes trapped in heat-sealed region
Solution Approach 1:
The invention optimizes the surface resistivity parameter of the packaging material's internal surface to a specific range (4.4×10^9Ω to 1.0×10^16Ω). This parameter change creates optimal electrostatic conditions that prevent adsorbent entrapment in heat-sealed regions while maintaining uniform adsorbent distribution, resolving the contradiction between adhesion and heat-sealing quality.
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
This solution prevents the internal adsorbent from being trapped in the heat-sealed region and reduces spillage when the package is opened, maintaining the adsorbent's integrity and preventing external air invasion, thus enhancing handling and storage quality.
Implementation Method 1
a packaging material having a mean specific surface resistivity of 4.4×10^9Ω to 1.0×10^16Ω at its internal surface
Implementation Method 2
the internal adsorbent is not trapped in the heat-sealed region thereof, and the internal adsorbent hardly spills out on opening
Implementation Method 3
an internal adsorbent can adsorb toxic substances taken into a body and harmful substances metabolized in a body
Implementation Method 4
a spherical activated carbon having a surface electric charge of 0.028 to 0.707 μC/g
Data Source
AI summary
The object of the present invention is to provide an single-dose package containing an internal adsorbent wherein the internal adsorbent is not trapped in the heat-sealed region thereof. In addition, the object of the present invention is to provide a single-dose package containing internal adsorbent wherein adhesion of the internal adsorbent around the vacuumed open region thereof is slight, whereby the internal adsorbent does not spill out on opening the package. The object of the present invention can be solved by a single-dose package characterized in that the internal adsorbent is tight-packed using a packaging material having a mean specific surface resistivity of from 4.4×109Ω or more to 1.0×1016Ω or less at its internal surface, under warming and/or reduced pressure.