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How to Spec a Medical Bonding or Display-Attachment Part: What to Send H-O for a Quote
The fastest bonding quote starts with the two surfaces, not the tape. If you send H-O both substrates and their surface energy, whether light passes through the joint, the cleaning and sterilization route, and the bond geometry, engineering can recommend an adhesive chemistry and carrier and quote a die-cut, kiss-cut part in one pass. This is the checklist that turns a bond idea into a converted part without a round of back-and-forth.
Start with both surfaces, not the tape
The most useful line on a bonding RFQ names the two surfaces and their nature: bond a coated aluminum bezel to a polycarbonate window, or a silicone keypad to an ABS housing. Naming both surfaces tells engineering which is the lower-energy one the adhesive has to hold, whether a differential tape is warranted, and whether a silicone chemistry is forced by a silicone surface. It short-circuits the most common bonding failure, which is choosing a tape that grips one surface and peels off the other. Send both surfaces first; the chemistry follows.
The seven inputs that size the part
After the two surfaces, seven inputs let engineering select and size the bond on the first pass:
- Both substrates and any coatings. Materials and surface treatments on each face, so the adhesive is chosen for the lower-energy surface.
- Optical requirement. Whether light passes through the joint, which forces a clear, low-yellowing, low-outgassing adhesive and often an open-aperture frame.
- Cleaning chemistry and sterilization route. What the bond-line edge must survive, and the cumulative cycle count, which sets whether acrylic or silicone chemistry fits.
- Bond and aperture geometry. The bond outline and, for optics, the clear aperture, so we cut the adhesive as a frame that keeps the light path open.
- Gap and bond-line thickness. Whether the joint needs a thin conformable film or a carrier for gap fill and handling.
- Biocompatibility basis. Whether the part contacts a sample or skin and what basis your file needs cited per the ISO 10993 series or USP Class VI.
- Application method and quantities. How the line places the part, whether a liner and pull tab help, and prototype plus production volumes.
What format to send
A dimensioned drawing of the bond and aperture is ideal, but a clear sketch with the outline, the open aperture, and the two surfaces labeled is enough to start. A DXF or STEP of the bond shape lets us cut a die-cut sample on your exact geometry fastest. If you have a material in mind from the parent page, name it and we will confirm it against both surfaces and the duty; if not, describe the joint and let engineering recommend a chemistry.
Tell us how the line applies the part so we kiss-cut it on a liner the way your process wants to place it.
From Bond Idea to Converted Part
| You send | It decides |
|---|---|
| Both substrates and coatings | Which surface the adhesive must hold; differential tape |
| Optical requirement | Clear low-yellowing adhesive; open aperture |
| Cleaning and sterilization route | Acrylic vs silicone chemistry at the edge |
| Bond and aperture geometry | Adhesive frame and die-cut outline |
| Gap and bond-line thickness | Transfer film vs double-coated carrier |
| Biocompatibility basis | ISO 10993 / USP Class VI citation in your file |
| Application method + quantities | Liner, pull tab, and tooling approach |
Biocompatibility basis is cited from the maker TDS per the ISO 10993 series and USP Class VI; peel and shear are per ASTM D3330 / D3654; outgassing per ASTM E595 for sealed optical bonds.
A worked example
Say you send: bond a coated aluminum bezel to a polycarbonate cover window, light passes through the central aperture, exterior cleaned with alcohol and a quaternary disinfectant, not autoclaved, bond outline with a 60 by 40 mm clear aperture, thin bond-line preferred, part does not contact a sample, ISO 10993 series basis wanted, 100 prototype and 8,000 per year.
From that, engineering would point at an optically clear acrylic transfer adhesive cut as an open-aperture frame so no adhesive sits in the light path, confirm it is characterized for low yellowing and low outgassing, suggest the maker's ISO 10993 basis for the file, and quote it kiss-cut on a liner with a pull tab. Where the bezel coating turned out to be low-energy, the recommendation would shift toward a differential combination tape.
That is the whole loop in one exchange.
How H-O Products helps
H-O Products is a precision die-cut converter, not a raw-material producer and not the device maker. Send us both surfaces and the bond geometry and we recommend an adhesive chemistry and carrier, then die-cut, kiss-cut, laminate, and kit the part to your drawing, with material traceability and lot-code TDS records under our ISO 9001:2015 certified quality management system in Winsted, Connecticut.
Grade-level values are confirmed against the maker's current TDS, and we cite the maker's published biocompatibility basis per the ISO 10993 series for your file. Sterilization validation, biocompatibility testing, and device clearance stay with the device owner.
Frequently asked questions
What is the single most useful thing to put on a bonding RFQ?
Both surfaces and their nature: name the two materials and any coatings, for example a coated aluminum bezel bonded to a polycarbonate window. That tells engineering immediately which is the lower-energy surface the adhesive has to hold, whether a differential tape is warranted, and whether a silicone surface forces a silicone chemistry. It avoids the most common bonding mistake of choosing a tape that grips one surface and peels off the other.
Do I have to send a CAD drawing, or is a sketch enough?
A sketch with the bond outline, the open aperture if light passes through, and the two surfaces labeled is enough to start. A dimensioned drawing is better, and a DXF or STEP of the bond shape is best because it lets us cut a die-cut sample on your exact geometry fastest. Send whatever you have; engineering can begin from a clear sketch and refine once a drawing exists.
How do I tell you about the optical requirement?
Say whether light passes through the joint and where the clear aperture is. If it does, we choose a clear, low-yellowing, low-outgassing adhesive and usually cut it as a frame that bonds the lens around its edge and leaves the aperture open, so no adhesive sits in the light path. Give the aperture dimensions, and we cut the frame so the bond holds at the edge and the optics stay untouched.
Why do you need the cleaning and sterilization route for a bond?
Because the exposed bond-line edge is the first place a cleaner or sterilant attacks, and the route decides the chemistry. An acrylic handles many wipe-down chemistries but softens under repeated steam autoclave; a silicone or silicone-acrylic hybrid tolerates higher heat and steam. Tell us the cleaning chemistry and the sterilization route and cycle count, and the adhesive is chosen so the bond-line survives the cumulative exposure at the edge.
How do I tell you whether I need a thin film or a thicker carrier?
Tell us the gap between the two parts and whether you need handling stiffness. A transfer adhesive is a film with no carrier, giving the thinnest, most conformable bond, ideal for flat, well-mated surfaces and optics. A double-coated tape adds a carrier for gap fill and placement stiffness. Describe the fit-up and how the part is handled, and we pick the carrier accordingly.
What biocompatibility information should I include?
Tell us whether the part contacts a sample, fluid, or skin, and what biocompatibility basis your file needs cited. We convert adhesives whose makers publish a basis per the ISO 10993 series, such as cytotoxicity, sensitization, and irritation endpoints, and USP Class VI where applicable, and we pass that basis through with traceability. We do not perform the testing or clear the device, so naming the basis you need lets us point you at a material whose maker publishes it.
Can you match an adhesive I already have on the parent page?
Yes. Name the family or grade you have in mind, such as an optically clear transfer adhesive or a differential combination tape, and we confirm it against both surfaces and the duty you describe and quote it as a die-cut part. If the surface energy or sterilization route makes it a poor fit, we will flag that and suggest an alternative. The two surfaces and the duty are what we check the material against.
How fast can I get a sample once I send the spec?
For common die-cut configurations on materials we keep on hand, samples typically ship in 3 to 5 business days, and sending a DXF or STEP of the bond shape is the fastest path because we cut on your exact geometry. Standard production runs about two weeks after drawing approval, and expedited service is available. MOQ varies by material and part. A complete checklist on the first pass keeps the sample loop short.
Does H-O qualify the assembly or validate the sterilization?
No. H-O converts the bonding adhesive to your drawing and supplies material traceability and lot-code TDS records that support your file. Validating the cleaning and sterilization, performing biocompatibility testing per the ISO 10993 series, and clearing the device belong to the device owner and its test houses. Our deliverable is the converted, kiss-cut part, made repeatably and traceably to your spec.
What do I send to get a bonding or display-attachment quote?
Send both substrates and any coatings, the bond and aperture outline or a drawing, whether light passes through the joint, the gap and preferred bond-line thickness, the cleaning chemistry and sterilization route and cycle count, the biocompatibility basis your file needs, how the line applies the part, and the prototype and production quantities. With that, engineering recommends an adhesive chemistry and carrier and quotes a die-cut, kiss-cut part in one pass.
Send your bonding spec for a quote
Send both surfaces, whether light passes through the joint, the cleaning and sterilization route, the bond and aperture geometry, and the quantities, and we will recommend an adhesive chemistry and carrier and quote a die-cut, kiss-cut part to your drawing.
Samples typically ship in 3 to 5 business days for common die-cut configurations on materials we keep on hand; standard production runs about two weeks after drawing approval; expedited service is available. MOQ varies by material and part.
Family-owned in Winsted, Connecticut since 1971 · ISO 9001:2015 certified · OEMs worldwide send us a drawing — and get back their part.
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Request a quote for your medical instrument bonding part
Send H-O both surfaces and the bond outline or the seven sizing inputs—engineering reviews every RFQ and converts samples on your geometry.
Last updated · Reviewed by H-O Products engineering (ISO 9001:2015 certified converter, Winsted, CT).
References
- ASTM D3330 (peel adhesion of pressure-sensitive tape); ASTM D3654 (shear / holding power of pressure-sensitive tape).
- ASTM E595 (total mass loss and collected volatile condensable material, for sealed optical bonds), cited by designation.
- ISO 10993 series (biological evaluation endpoints) and USP Class VI, cited by designation as the biocompatibility basis named on each maker data sheet.
- Manufacturer technical data sheets for the optically clear transfer adhesive, double-coated, differential, silicone or silicone-acrylic hybrid, and rubber-based grades named on the parent application page.
This article summarizes material-selection and design principles for medical instrument bonding and display attachment using the families and published test methods cited on the parent application page. Comparisons are qualitative; per-grade values are maker technical-data-sheet figures and must be confirmed on the manufacturer's current TDS at your installed condition. Standards (ISO 10993, USP Class VI, ISO 11607, IEC, ASTM, UL) are cited by designation for context, not as a claim of qualification or registration.
H-O Products is a precision die-cut converter, not a raw-material producer and not the device maker; biocompatibility testing, sterilization validation, device clearance, and final-assembly certification belong to the device owner and its test houses.