Overview

An electroformed screen etching service builds the screen by growing nickel onto a patterned mandrel instead of cutting holes out of rolled sheet. Photoresist defines the aperture field on a polished drum or plate, nickel is deposited from a sulfamate bath until the wall reaches its target thickness, and the mesh is lifted off as a seamless skin. Because the hole is formed by the mandrel rather than by etchant travel, aperture size no longer depends on how thick the wall is: a 0.02 mm opening can sit in a 0.10 mm wall, which is beyond the aspect ratio of through-etched foil.

That difference decides where each process is used. Chemical etching removes material from both faces of a sheet, so walls end up straight or slightly barrelled, and a welded drum carries a seam that traps particles. Electroforming produces a continuous cylinder with tapered walls that open toward the flow, a smooth matte surface, and open area up to 72% at a wall thin enough to keep pressure drop low. Filtration duty, backflush behaviour and cleanability are set at the mandrel stage, which is why an electroformed screen etching service is specified by filtration rating and flow, not by mesh count.

Parameter Window

• Available Materials: electroformed nickel Ni 99.9%, nickel-cobalt option, 304 stainless support rings and end caps
• Material Thickness Range: 0.02–0.15 mm wall
• Tolerance: ±0.05 mm on pattern position and mounting features; about ±10% on wall thickness
• Minimum Feature: 0.02 mm aperture with 0.015 mm ligament; open area 40–72%
• Surface Options: matte or satin nickel, passivated finish, support ring bonding, pleated or flat blank, seamless drum
• Compliance: ISO 9001 process control, RoHS/REACH material traceability

Manufacturing Process / Workflow (8 Steps)

1. Application Review — Fix the filtration rating, flow rate, differential pressure and cleaning method, then choose aperture, wall thickness and drum format.
2. Mandrel Preparation — Polish the stainless or brass mandrel to a mirror finish and apply a release layer so the deposited skin separates cleanly.
3. Photoresist Patterning — Coat, expose and develop photoresist on the mandrel, leaving open islands exactly where the apertures will be.
4. Electroforming — Deposit nickel from a sulfamate bath at controlled current density, building wall thickness evenly across the pattern.
5. Wall and Taper Control — Adjust the growth profile so the aperture tapers open toward the dirty side, which sets both flow and backflush behaviour.
6. Separation — Lift the seamless skin from the mandrel, then trim to the developed length and verify that no tear or wrinkle has formed.
7. Finishing & Assembly — Passivate, bond to a 304 stainless support ring or end cap, and pleat or flatten according to the housing design.
8. Inspection & Packing — Measure aperture, open area, wall thickness and bubble point, run a flow check, then pack flat or on a mandrel former.

Core Advantages

1. Seamless construction: drums and belts come off the mandrel in one piece, so there is no weld line to leak, trap particles or fail in fatigue.
2. Aperture below etched limits: 0.02 mm holes are routine, because the opening is defined by photoresist on the mandrel rather than by etchant reaching through a wall.
3. Tapered hole walls: apertures widen toward the upstream face, spreading pressure and letting backflush release the cake instead of packing it tighter.
4. High open area at low weight: 40–72% open area in a 0.02–0.15 mm wall keeps pressure drop low without a heavy support layer.
5. Smooth, non-shedding surface: the deposited nickel is fine-grained and matte, with no weave intersections or loose fibres to enter the filtrate.
6. Repeatable filtration rating: bubble point and flow are fixed by the mandrel and bath recipe, so a repeat order from an electroformed screen etching service holds the same rating.

Typical Applications

• Rotary drum filtration: seamless nickel belts for coolant, paper-coating and process water filtration.
• Fuel and hydraulic fine filtration: high-pressure elements that need a stable micron rating and clean backflush.
• Polymer melt filtration: screens that resist blinding at melt temperature and release degraded polymer on purge.
• Beverage and dairy filtration: smooth nickel mesh that cleans in place and leaves no fibrous residue.
• Medical and laboratory filtration: thin screens for sample prep and inline filters where shed fibres are unacceptable.
• Air-oil separation: fine nickel mesh that coalesces mist while holding low pressure drop.

Design Notes & Process Considerations

1. Aperture versus wall: a wall of 1.5–3× the aperture keeps the ligament strong; thinner walls raise open area but demand a support layer.
2. Taper direction: state which face meets the dirty flow, because the taper is built into the mandrel and cannot be reversed after deposition.
3. Seamless size limits: drum circumference and length follow the mandrel available, so confirm the format before the housing is designed around it.
4. Support and sealing: bond to a 304 stainless ring or end cap, and leave a solid nickel band at the seal so the screen does not tear under clamping.
5. Cleaning method: give backflush pressure and chemical compatibility; a 0.02 mm wall tolerates less reverse pressure than a woven or etched sheet.
6. Specification package: define micron rating, open area, wall thickness, drum size and cleaning regime; an electroformed screen etching service quotes against those five values.