For over 25 years, Kenosha has supplied precision-engineered backing cards that form the foundation of reliable lateral flow assays and diagnostic devices. Our adhesive-coated cards ensure perfect alignment, flatness, and dimensional stability, essential for consistent assay performance from R&D through to high-volume manufacturing.
Trusted by diagnostics manufacturers worldwide, we deliver both standard rolls and custom solutions, meeting the strictest quality standards of the medical and IVD industry.
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What are backing cards in lateral flow tests?
Backing cards provide the structural support that keeps every layer of a lateral flow test precisely aligned and stable. They serve as the base layer onto which sample pads, nitrocellulose membranes, and absorbent pads are laminated, ensuring accurate overlap and smooth assembly.
Even minimal deviations in flatness or adhesive thickness can affect capillary flow. That’s why Kenosha applies controlled lamination pressure and uses certified adhesive systems to maintain exact tolerances and reproducible performance.
KN-2211® Adhesive backing cards or rolls
Our proprietary KN-2211™ adhesive is optimized for use on backing cards and rolls in the cost-efficient assembly of lateral flow diagnostic tests. The formulation offers excellent dimensional stability and tight tolerance control, while its chemically inert adhesive system ensures no interference with assay reagents or signal development.
Material options & adhesive types
Our range of materials includes polyester, PVC, and PET films available in multiple thicknesses, medical-grade pressure-sensitive adhesives (PSA), and clean-room-converted rolls and sheets to ensure consistent quality and performance in regulated diagnostic and medical applications.
Adhesives can be selected for specific bond strength, temperature resistance, or chemical compatibility. Each formulation is evaluated for inertness toward assay reagents and long-term stability under storage and operating conditions. Depending on the application, substrates can be laminated, die-cut, or slit to custom dimensions, ensuring precise fit and performance within the device stack. All materials are traceable per batch to meet the quality standards of diagnostic and medical manufacturing environments.
Precision cutting & lamination
We convert and laminate materials in-house, ensuring:
- Tight dimensional tolerances for consistent device assembly
- Smooth, bubble-free surfaces for optimal lamination and bonding
- Custom roll widths and sheet formats tailored to your process
Whether for prototype development or production-scale manufacturing, our controlled processes deliver repeatable results and full batch traceability, meeting the stringent requirements of diagnostic and medical applications.
Custom sizes, shapes, and thicknesses
Kenosha provides fully customizable backing cards designed for precise alignment and optimal assay performance. Available options include:
- Custom thicknesses to support assay optimization and flow control
- Adhesive-free zones for clean and accurate membrane placement
- Die-cut formats compatible with automated assembly and lamination lines
Our team collaborates closely with assay developers to optimize material combinations, ensuring mechanical stability, chemical compatibility, and reproducible performance across production batches.
Quality & Certification
All manufacturing processes are conducted under a certified ISO 9001:2025 Quality Management System, ensuring consistent quality and full process traceability. From raw material selection to final inspection, every step is documented, monitored, and controlled to meet the stringent requirements of diagnostic and medical material manufacturing.
Why choose Kenosha backing cards?
- 25+ years of expertise in IVD and lateral flow material engineering
- Batch-to-batch consistency through controlled, clean-room manufacturing
- Scalable supply options supporting both R&D and high-volume production
- Proven global performance across diagnostic and medical device applications
- Custom adhesive formulations and dimensions tailored to device design and regulatory requirements
We help startups
Thanks to our infrastructure, we don’t require high MOQ (Minimum Order Quantity). Making your (startup) prototype quickly, cheaply and feasibly.
