Surface-Activated Profile Joining for Sterile Thermoset Bonds
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods face challenges in creating a reliable and sterile weld between different thermoset elastomeric materials, particularly those like silicone elastomers that cannot be melted, and maintaining sterility during the welding process.
Innovation Solution
A surface activation treatment is applied to the ends of two profiles, one made of a thermoset material and the other potentially including a metal, allowing them to be coincidentally bonded without a bonding material at their interface, thereby forming a sterile connection that withstands pressure and maintains sterility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional high temperature welding methods are used, then thermoplastic materials can be joined, but thermoset elastomeric materials like silicone cannot be welded because they cannot be melted
Solution Approach 1:
The invention changes the bonding mechanism from thermal melting to mechanical interlocking through surface treatment. The extruded profile includes an external seam that creates mechanical engagement with the mating profile, eliminating the need to melt thermoset materials while achieving strong bonds between incompatible materials like silicone and metal
Solution Approach 2:
The external seam acts as an intermediary feature that facilitates bonding between incompatible materials. This geometric feature provides a mechanical interface that enables joining without requiring material compatibility or thermal processing, allowing thermoset elastomers to be joined to metals and other difficult-to-bond materials
2Strength
If welding processes are applied to join profiles, then structural integrity is improved, but sterility is compromised due to contamination risk during the welding process
Solution Approach 1:
The profiles are pre-formed with integrated external seam features during extrusion, eliminating the need for post-manufacturing welding operations. This preliminary incorporation of bonding features allows sterile assembly through simple mechanical engagement, maintaining sterility while achieving strong bonds
Solution Approach 2:
The invention extracts the bonding function from the material itself and embeds it in the geometric feature (external seam). This separation allows the bonding capability to be achieved through mechanical means rather than thermal processes, enabling sterile assembly without compromising bond strength
3Strength
If bonding materials are used to join profiles, then bond strength is improved, but the complexity of the connection increases due to additional materials and processing steps
Solution Approach 1:
The bonding function is merged into the profile geometry itself through the external seam feature. This integration eliminates the need for separate bonding materials and processes, achieving strong bonds while reducing connection complexity to a single-step mechanical engagement
Solution Approach 2:
The external seam provides self-contained bonding capability within the profile structure. The geometric feature automatically provides the bonding function when profiles are assembled, eliminating the need for external bonding materials or additional processing steps
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 method achieves a strong and sterile bond with mechanical strengths comparable to or exceeding those of the bulk materials, maintaining integrity under pressure and ensuring sterility, suitable for applications in medical and pharmaceutical industries.
Implementation Method 1
providing a surface activation treatment; and contacting the first end directly to the second end to coincidently bond the first end to the second end at an interface
Data Source
AI summary
A connection includes: a first profile having a first end, the first profile including a first polymeric material comprising a thermoset material; and a second profile having a second end, the second profile including a second polymeric material, a metal, or combination thereof, wherein the first end and the second end are coincidently bonded without a bonding material at an interface of the first end and the second end.