Cooling Compress Manufacturing via Continuous Sheet Welding
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Solution Overview
Problem
Current methods for manufacturing cooling effect compresses with absorbent polymers struggle with scalability, cost-effectiveness, and reliability in industrial production, while also compromising on the quality and safety of the cooling effect and user experience.
Innovation Solution
The method involves laminating water-permeable sheets to form dry compresses with absorbent polymer particles, which are then packaged with a water sachet in a vacuum envelope, using rolling techniques and welding to ensure sterility and ease of activation, with one sheet being elastically deformable for powder distribution and the other for mechanical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods are used to manufacture cooling compresses, then production can be carried out, but scalability and productivity are limited
Solution Approach 1:
The patent implements continuous manufacturing by passing sheets through rolling units that continuously deposit polymer powder and seal compresses without interruption. The sheets move continuously through the production line, enabling mass production rather than batch processing, thereby significantly increasing productivity while maintaining manufacturing feasibility through automated continuous operations
Solution Approach 2:
The patent pre-forms grooves in the sheets before polymer powder deposition. This preliminary action creates predetermined compartments that guide powder distribution and subsequent sealing, enabling efficient mass production by establishing the compress structure in advance rather than forming it during the deposition process
2Manufacturing precision
If polymer powder is deposited without grooves, then production is simpler, but powder distribution and compartmentalization are poor
Solution Approach 1:
Grooves are pre-formed in the sheets before polymer powder deposition. This preliminary structuring creates defined compartments that precisely control powder distribution, ensuring each compress receives the correct amount and placement of polymer powder, thereby improving manufacturing precision without significantly complicating the overall process
Solution Approach 2:
The sheets are divided into multiple grooves that create separate compartments for polymer powder deposition. This segmentation allows precise control over powder distribution across multiple compresses simultaneously, enabling accurate dosing and compartmentalization while maintaining a relatively simple continuous production process
3Strength
If one sheet is used for both compression and sealing, then device complexity is reduced, but mechanical resistance and permeability are compromised
Solution Approach 1:
The patent uses two different sheets with differentiated properties: one sheet optimized for mechanical resistance and compression, another optimized for water permeability and sealing. Each sheet performs its specific function locally, allowing the system to achieve both high mechanical strength and appropriate permeability without requiring a single multi-functional sheet that would compromise either property
Solution Approach 2:
The patent employs a composite structure of two different sheets working together. The first sheet provides mechanical strength and compression properties, while the second sheet provides water permeability and sealing capabilities. This composite approach allows the system to achieve properties that would be difficult to obtain with a single material, balancing mechanical resistance and permeability effectively
4Reliability
If sterile packaging is implemented, then product safety is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent combines the compress manufacturing and sterile packaging processes into a single integrated operation. The rolling unit simultaneously seals the compress and encloses it within a sterile packaging envelope, eliminating the need for separate packaging steps and reducing overall manufacturing complexity while ensuring sterility through continuous vacuum sealing
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 approach enables mass production of high-quality cooling compresses with improved safety and user convenience, maintaining sterility and ensuring effective activation of the cooling effect through controlled water release.
Implementation Method 1
a material with elastically reversible thermal deformation is advantageously chosen
Implementation Method 2
the operation of which is due to the cryogenic activity of which particles of absorbent polymers having retained large quantities of water are capable
Implementation Method 3
polymers active in refrigeration by absorption of water, or of polymers activated by swelling with water
Implementation Method 4
the cryogenic effect occurs essentially by vaporization of the water during its desorption from the absorbent particles
Implementation Method 5
two sheets which are made of a watertight and airtight material which are welded together around each water bag and dry compress assembly
Data Source
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AI summary
The invention relates to the production of wound-care articles in the form of compresses, which have a cooling effect through swelling in water and which are presented individually in vacuum packaging. According to the invention, successive doses of a powder of absorbent particles are placed in furrows formed by elastic deformation in a lower sheet, which is made of a water-permeable textile material and is unwound in a continuous strip, and then entirely covered by an upper sheet, which is unwound in a continuous strip, parallel to the lower sheet, and is welded to said lower sheet along the intervals between adjacent furrows, thereby isolating the furrows from one another. Then, in each furrow, successive compartments that each contain a dose of said powder are closed by welding said sheets along transverse weld lines across the whole strip. In a subsequent packaging unit, the compresses obtained each receive a sachet of water, with which they are individually enclosed between two impermeable sheets welded to each other around each compress.