Multi-Layer Polysilicon Packaging Bag Gas Barrier
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Solution Overview
Problem
Conventional packaging bags for crushed polysilicon material fail to adequately prevent contamination from ambient air, as gas barrier properties applied to the outer bag do not sufficiently protect the inner bag, leading to contamination during transportation and handling.
Innovation Solution
A multi-layer packaging bag structure with an additive-free polyethylene-based resin layer as the innermost layer, a gas barrier layer to prevent gas penetration, and a reinforcing material layer to enhance durability and prevent breakage, ensuring effective contamination protection from the moment of packaging to use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polyethylene-based resin film is used for the inner bag to prevent contamination, then the material purity is maintained, but gas barrier properties are insufficient allowing contamination gas penetration
Solution Approach 1:
The patent applies composite materials by creating a multi-layer film structure where a polyethylene-based resin layer is combined with a gas barrier layer. The polyethylene layer maintains material purity by preventing contamination, while the gas barrier layer (made of materials like aluminum oxide, silicon oxide, or titanium oxide) provides the necessary gas barrier properties to prevent contamination gas penetration. This composite structure resolves the contradiction by integrating the advantages of both materials.
Solution Approach 2:
The patent applies the nesting principle by creating a multi-layer film structure where different functional layers are stacked together. The polyethylene-based resin layer is positioned as the innermost layer that directly contacts the crushed polysilicon material, while the gas barrier layer is positioned on the outer side. This nested arrangement allows each layer to perform its specific function - the inner layer prevents direct contamination while the outer layer blocks gas penetration.
2Object-affected harmful factors
If gas barrier properties are provided to the outer bag, then external contamination is reduced, but the inner bag remains vulnerable to contamination during handling and transportation
Solution Approach 1:
The patent applies preliminary action by equipping the inner bag with gas barrier properties from the outset, rather than relying solely on the outer bag. The multi-layer film structure is designed so that the inner bag itself possesses gas barrier capabilities through the integrated gas barrier layer. This preliminary protection ensures that even when the outer bag is removed during handling and transportation, the inner bag continues to protect the crushed polysilicon material from contamination.
3Ease of manufacture
If a single-layer polyethylene film is used for the inner bag, then simplicity and ease of manufacture are maintained, but gas barrier properties are insufficient
Solution Approach 1:
The patent applies composite materials by combining a polyethylene-based resin layer with a gas barrier layer to form a multi-layer film. This composite structure maintains ease of manufacture because the layers can be produced using conventional lamination techniques already established in the packaging industry. The gas barrier layer is applied as a coating or laminate on the polyethylene base, allowing production to proceed with minimal changes to existing manufacturing processes while achieving the necessary gas barrier properties.
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 multi-layer bag effectively prevents contamination of the crushed polysilicon material by ambient gases and water vapor, maintaining the material's purity until it is used, even when exposed to environmental conditions during transportation and handling.
Implementation Method 1
a gas barrier layer which prevents penetration of a contamination gas
Implementation Method 2
a multi-layer film in which an additive-free polyethylene-based resin layer is disposed in an innermost layer
Data Source
AI summary
A packaging bag according to the present invention for packing a crushed polysilicon material is a packaging bag (1) for directly packaging a crushed polysilicon material and includes a multi-layer film in which an additive-free polyethylene-based resin layer (2) is disposed in an innermost layer, and, on the polyethylene-based resin layer, at least a gas barrier layer (3) and a reinforcing material layer (4) are stacked.