Overview

Strainer mesh etching is the photochemical machining route for producing flat, burr-free filter screens and strainer elements from thin sheet metal. Instead of punching or weaving, a photoresist mask is imaged with the hole pattern on both faces of the sheet and the unprotected metal is dissolved in a controlled etchant, leaving a precise lattice of apertures and strands in a single, stress-free foil. Typical stock is stainless steel 304/316L, copper, nickel or titanium between 0.03 mm and 1.0 mm, and the process holds hole diameters, bar widths and open area tightly even on fine pitches. Because no hard tooling touches the material, the screens stay flat, have no rolled edges or burrs, and repeat identically from the first article to full production.

Buyers searching for strainer mesh etching usually need a screen that neither woven wire nor perforated sheet can satisfy: a defined open area with clean, unobstructed holes, a specific strand width for strength, and the option to add rims, tabs or half-etched logos in the same operation. Photochemical etching delivers all of that on one film, so prototype-to-volume production is straightforward — a new hole pattern is just a new artwork file, with no die lead time or tooling charge. The screens serve fuel, hydraulic, water, food, medical and analytical equipment where consistent filtration and easy cleaning matter more than raw thickness.

Parameter Window

• Available Materials: stainless steel 304/316L, copper, nickel, titanium, duplex stainless on request
• Material Thickness Range: 0.03–1.0 mm, with most strainer screens in the 0.05–0.5 mm band
• Tolerance: ±0.02 mm on hole diameter and strand width, ±0.05 mm on overall profile
• Minimum Feature: hole diameter ≥0.10 mm or 1.2 × thickness, minimum strand ≥0.10 mm
• Surface Options: passivation, electropolishing, PTFE/nickel plating, anti-clog coating, framed or rimmed edges
• Compliance: ISO 9001 process control, RoHS/REACH material traceability

Manufacturing Process / Workflow (8 Steps)

1. Artwork & Nesting — Convert the hole array to vector artwork, check open-area ratio and nest multiple screens per sheet.
2. Material Selection — Choose alloy and temper for the fluid, temperature and cleaning chemistry the screen will see.
3. Cleaning & Lamination — Degrease both faces and laminate dry-film resist under heat and pressure for pinhole-free coverage.
4. Two-Sided Exposure — Register front and back films to each other and expose, so holes etch symmetrically from both sides.
5. Development — Wash out the aperture areas on both faces and inspect for scumming or unopened holes.
6. Etching — Spray etchant matched to the alloy, controlling time, temperature and conveyor speed for the target strand and sidewall.
7. Stripping & Finishing — Remove resist, neutralize, passivate or electropolish, then add frames, coatings or half-etched marks.
8. Inspection & Packaging — Measure hole size, strand width and open area against the approved sample, then pack flat in trays.

Core Advantages

1. Burr-free flat screens: Chemical removal leaves no roll-over or burr, so screens seal evenly and will not shed particles downstream.
2. No tooling cost: Each new pattern is a new film, keeping short runs and frequent design revisions economical.
3. Tight open-area control: Hole and strand dimensions are set by artwork and etch time, giving repeatable flow and pressure drop.
4. Complex patterns in one piece: Rims, tabs, slot arrays and graded holes can be formed at once without welding secondary parts.
5. Material flexibility: Stainless, copper, nickel and titanium run on the same line to match corrosive or hygienic duties.
6. Cleanable and durable: Smooth electropolished walls resist clogging and tolerate repeated back-flush and chemical cleaning.

Typical Applications

• Fuel and hydraulic strainers: In-line screens that protect injectors, pumps and valves from particulate.
• Water and beverage filtration: Hygienic stainless screens for pre-filters and dispensing equipment.
• Medical and lab devices: Fine meshes for diagnostic cartridges, vents and fluidic filters.
• Aerospace and automotive filters: Lightweight screens for cabin air, oil and coolant circuits.
• Process and chemical screens: Corrosion-resistant titanium or 316L meshes for aggressive media.
• Protective vents: Acoustic and EMI meshes that allow airflow while blocking dust and droplets.

Design Notes & Process Considerations

1. Hole-to-thickness ratio: Keep hole diameter at or above 1.2 × material thickness, or strands will undercut and lose definition.
2. Strand width: Narrower strands raise open area but weaken the screen; state a minimum web for the required burst or handling strength.
3. Open-area target: Specify open area as a percentage so flow rate and pressure drop can be predicted from the artwork.
4. Edge and frame: Call out a solid rim, frame or tab allowance so the mesh can be clamped, welded or bonded without tearing.
5. Etch factor: Allow for lateral undercut when plotting artwork; compensation is applied to the film to hit finished hole size.
6. Cleaning and coating: Name the service fluid, cleaning method and any coating, and confirm compatibility before ordering strainer mesh etching at volume.