Nested Carbon Black Packaging for Moisture Barrier and Label Visibility
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Solution Overview
Problem
Carbon black with low bulk density is difficult to package while maintaining low moisture content and is challenging to discern due to its appearance, and existing packaging methods do not facilitate easy printing of product information.
Innovation Solution
A packaging body comprising an inner bag with air permeability and an outer bag with low water vapor and oxygen transmission rates, along with a high visible light transmission rate, which accommodates carbon black with a bulk density of 0.3 g/cm3 or less, allowing easy handling and printing of product information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If carbon black is provided as a powder with low bulk density, then it is easy to package, but it is difficult to maintain low water content because it easily absorbs moisture from the atmosphere
Solution Approach 1:
The patent uses a nested packaging structure where an inner bag containing carbon black is placed inside an outer bag. The inner bag has air permeability to facilitate easy filling of low bulk density carbon black, while the outer bag provides moisture barrier protection with low water vapor transmission rate, thus resolving the contradiction between ease of packaging and moisture control.
Solution Approach 2:
Different parts of the packaging system have different properties: the inner bag is designed with air permeability for easy filling operation, while the outer bag is designed with low water vapor transmission rate for moisture protection. This local differentiation of properties allows simultaneous achievement of ease of packaging and reliable moisture control.
2Ease of operation
If carbon black has low bulk density, then it flows easily for packaging, but it is difficult to discern product information from appearance
Solution Approach 1:
The outer bag is designed with high visible light transmission rate, allowing printed product information to be easily seen through the packaging material. This optical property enhancement resolves the contradiction by making product information visible while maintaining the low bulk density carbon black's easy handling characteristics.
3Reliability
If the outer bag has low water vapor transmission rate, then moisture content is maintained, but printing visibility may be affected
Solution Approach 1:
The outer bag is designed with specific local properties: low water vapor transmission rate in the material structure for moisture protection, while maintaining high visible light transmission rate for printing visibility. This localized differentiation of functional properties resolves the contradiction between moisture maintenance and printing discernibility.
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 packaging body effectively maintains low water content and allows easy printing and discernment of product information, while facilitating easy handling and production of carbon black with low bulk density.
Implementation Method 1
the outer bag has a water vapor transmission rate of 1 g/(m2·day) or less
Implementation Method 2
an inner bag having air permeability
Data Source
AI summary
A packaging body provided with an inner bag having air permeability, an outer bag covering the inner bag, and contents accommodated in the inner bag, wherein the outer bag has a water vapor transmission rate of 1 g/(m2·day) or less, an oxygen transmission rate of 1 cc/(m2·day·atom) or less, and a visible light transmission rate of 50% or more; and the contents are carbon black having a bulk density of 0.3 g/cm3 or less.