Soft Textile Transfer Case for Hazardous Materials
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Solution Overview
Problem
Current container solutions for transporting biologically or chemically hazardous materials are inadequate for larger volumes, as they experience higher stresses and are not puncture-resistant, leak-proof, or easily portable, failing to meet safety and shipping standards for larger scale containers.
Innovation Solution
A soft goods transfer case with a film-laminated, woven para-aramid synthetic fiber exterior layer and a molded elastomeric bladder, designed to decouple structural strength from air/fluid retention, providing a puncture-resistant and leak-proof container that can accommodate larger contents and withstand drops and rapid decompression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If container size is increased to accommodate larger contents, then volume capacity is improved, but stress and pressure resistance deteriorates
Solution Approach 1:
The container is divided into two functional segments: an outer textile layer providing structural strength and stress resistance, and an inner elastomeric bladder providing volume expansion and containment. This segmentation allows each layer to optimize its specific function without compromising the other.
Solution Approach 2:
The container employs a composite structure combining para-aramid synthetic fiber textile with elastomeric bladder material. The para-aramid textile provides high tensile strength and puncture resistance, while the elastomeric bladder provides flexibility and volume expansion capability, creating a composite system that achieves both large volume and high strength.
2Volume of stationary object
If container size is increased to accommodate larger contents, then volume capacity is improved, but puncture resistance deteriorates
Solution Approach 1:
The container separates the puncture resistance function to the outer textile layer while the inner bladder handles volume containment. The textile layer's continuous warp and weft yarns create a puncture-resistant barrier that protects the bladder from external penetration.
Solution Approach 2:
The para-aramid synthetic fiber textile provides exceptional puncture resistance due to its high tensile strength and fiber architecture, while the elastomeric bladder provides smooth internal surfaces that resist puncture from within. The composite structure achieves superior puncture resistance at large volumes.
3Volume of stationary object
If container size is increased to accommodate larger contents, then volume capacity is improved, but leak-proof performance deteriorates
Solution Approach 1:
The container divides the leak-proof function to the inner elastomeric bladder while the outer textile layer provides structural integrity. The bladder's elastomeric material forms a continuous impermeable barrier that prevents leakage, while the textile layer maintains the container's shape and resists external forces that could cause failure.
Solution Approach 2:
The combination of elastomeric bladder material with the textile layer creates a composite system where the bladder provides the primary leak-proof barrier through its elastic and impermeable properties, while the textile reinforcement prevents bulging and maintains structural integrity under pressure, ensuring leak-proof performance at large volumes.
4Weight of moving object
If container weight is reduced to improve portability, then ease of operation is improved, but strength and durability deteriorate
Solution Approach 1:
The container uses a flexible elastomeric bladder instead of a rigid structure, eliminating the need for heavy reinforcement while maintaining strength through the textile layer. The thin-film elastomeric material provides sufficient containment with minimal weight, and the para-aramid textile layer adds strength only where needed for structural integrity.
Solution Approach 2:
The para-aramid synthetic fiber textile provides high strength-to-weight ratio, offering exceptional strength with minimal weight addition. The elastomeric bladder material provides lightweight containment. Together, the composite structure achieves portability with strength, weighing under 200 pounds while meeting all strength and durability requirements.
5Productivity
If sealing time is reduced to improve efficiency, then productivity is improved, but sealing reliability deteriorates
Solution Approach 1:
The container is designed with pre-positioned opening and closing mechanisms that are prepared in advance for rapid sealing. The elastomeric bladder and textile layer are pre-assembled with alignment features that enable quick connection and sealing without complex adjustment procedures.
Solution Approach 2:
The sealing system is segmented into independent opening and closing mechanisms that can operate quickly and independently. The design separates the sealing function from the containment function, allowing rapid sealing through dedicated sealing mechanisms while maintaining leak-proof reliability through the bladder-textile composite structure.
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 enables safe transport of hazardous materials by ensuring the container remains leak-proof under high pressure and after drops, is air transportable, and meets weight and portability requirements, while preventing rapid decompression and maintaining integrity during use.
Implementation Method 1
a molded elastomeric bladder containable within the outer circular woven preform
Implementation Method 2
The fabric layer of the woven preform resists expansion when the interior bladder is inflated
Implementation Method 3
The fabric layer of the woven preform resists expansion when the interior bladder is inflated
Implementation Method 4
a film-laminated, woven para-aramid synthetic fiber textile exterior layer
Implementation Method 5
The strength of the transfer case and the air/fluid retention functions are intentionally decoupled
Implementation Method 6
preventing rapid decompression without a method for pressure relief
Data Source
AI summary
A soft transfer case for biological and chemical material is provided. The transfer case includes a film-laminated, woven textile exterior layer as a pouch resembling an open cylinder. The cylinder is capable of being clamped at each end of the cylinder. A pouch shaped and single open end elastomeric bladder capable of containing biological and chemical material can be contained by the exterior layer. The bladder requires only one seam which is used to permanently seal the open end with the material contained therein. Upon pressurization of the bladder, the exterior layer expands and a restraining force is generated between the textile layer and the clamps.