描述
MacDermid Alpha Micromax 5028B Cadmium-Free Silver Conductor for Membrane Switch
Type: Silver Conductor Ink
Application: Membrane Switch, Flexible Circuit
Solids: 69–71%
Compliance: Cd / Pb / Ni / Phthalate Free
Shelf Life: 6 months
Micromax 5028B is a silver conductor ink formulated without intentional addition of cadmium, lead, nickel, or phthalate. It reaches resistivity of 12 mΩ/sq or less at 25μm and offers excellent residence time on the screen, which fits reel-to-reel and semi-automatic production lines.
Micromax 5028B silver conductor from MacDermid Alpha is formulated for low-voltage circuitry, especially on flexible substrates. It is particularly suited to applications requiring high conductivity or fast curing. The composition is free of intentionally added cadmium, lead, nickel, and phthalate, which aligns it with RoHS-style supply chain requirements. Polyester, paper, and epoxy glass are listed as compatible substrates.
The ink carries 69–71% solids and a viscosity of 15–30 Pa.s. Box-oven drying is 120–130°C for 6 minutes; reel-to-reel drying is 140°C for 1–1.5 minutes. Cured traces hold resistivity at 12 mΩ/sq or less at 25μm, with resistivity after a 180° crease staying under 100 mΩ/sq. Adhesion shows no material transfer, and pencil hardness reaches 2H or higher. Work life is over 1 hour. Store sealed at 5–30°C; unopened shelf life is 6 months.
Genuine MacDermid Alpha Micromax Imported Stock & Technical Support
We hold regular stock of authentic MacDermid Alpha Micromax 5028B silver conductor ink. Original factory TDS and batch-specific COA are available on request for your membrane switch and flexible circuit programs.
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Complete TDS, COA, and regulatory documentation available
Key Features of MacDermid Alpha Micromax 5028B
- Cadmium, lead, nickel and phthalate free formulation (no intentional addition)
- Silver conductor ink built for low-voltage flexible circuit traces
- Excellent conductivity: resistivity ≤12 mΩ/sq at 25μm
- Suited to fast-curing processes and high-throughput production lines
- 69–71% solids content for stable deposition
- Viscosity 15–30 Pa.s for screen printing consistency
- Box-oven dry: 120–130°C for 6 minutes; reel-to-reel dry: 140°C for 1–1.5 minutes
- Resistivity after 180° crease stays below 100 mΩ/sq
- Pencil hardness ≥2H for abrasion resistance
- No material transfer in adhesion testing
- Excellent residence time on the screen
- Adheres to polyester, paper, and epoxy glass
- Screen clean-up with ethylene glycol or diacetate
- Mix work life exceeds 1 hour
Primary Applications
- Membrane switch conductors — silver traces for switch circuitry
- Compliance-sensitive programs — where cadmium, lead, nickel, and phthalate restrictions apply
- High-conductivity flexible circuits — low-voltage traces on polyester and paper
- Reel-to-reel production — suitable for high-volume flexible circuit manufacturing
Full Technical Specifications
| Property | Typical Value | TDS Reference |
| Product Type | Silver conductor ink | TDS: Silver Conductor |
| Application | Membrane switch conductor | TDS: Membrane switch conductor |
| Solvent or Thinner | Micromax 3610 | TDS: Micromax 3610 |
| Solid Content | 69 to 71 % | TDS: 69 to 71 % |
| Maximum Service Temperature | 110 °C | TDS: 110 °C |
| Viscosity | 15 to 30 Pa.s | TDS: 15 to 30 Pa.s |
| Mask Mesh | 325 | TDS: 325 |
| Drying Time | 6 minutes | TDS: 6 min |
| Drying Temperature | 120 to 130 °C | TDS: 120 to 130 °C |
| Theoretical Coverage | 230 to 320 cm²/g | TDS: 230 to 320 cm²/g |
| Recommended Film Thickness | 8 to 10 μm | TDS: 8 to 10 μm |
| Adhesion | No material transfer | TDS: 3M Scotch Tape #600 |
| Resistivity | ≤ 12 mΩ/sq at 25μm | TDS: ≤ 12 |
| Substrate Compatibility | Polyester, paper, epoxy glass | TDS: Polyester, paper, epoxy glass |
| Screen Types | Polyester, stainless steel | TDS: Polyester, stainless steel |
| Printing Methods | Reel-to-reel, semi-automatic, manual | TDS: Reel-to-reel, semi-automatic, manual |
| Typical Circuit Line Thickness | 8 - 10 μm | TDS: 8 - 10 μm with 325-mesh stainless steel screen |
| Work Life | > 1 hour | TDS: > 1 hour |
| Clean-up Solvent | Ethylene glycol or Diacetate | TDS: Ethylene glycol or Diacetate |
| Resistivity after Flex | < 100 mΩ/sq at 25.4μm (15 sec after test) | TDS: < 100 |
| Crease (180°, 1 cycle) | < 100 | TDS: < 100 |
| Abrasion Resistance, Pencil Hardness | ≥ 2H | TDS: ≥ 2 (ASTM D3363-74) |
| Soldering | Not recommended | TDS: Not Recommended |
| Cadmium, Lead, Nickel and Phthalate Free | Yes (no intentional addition) | TDS: Product benefits |
| Change in Physical Properties after Environmental Tests | Insignificant | TDS: Insignificant |
| Change in Electrical Properties after Environmental Tests | < 10 % | TDS: < 10 |
| Shelf Life | 6 months | TDS: 6 months |
| Storage Temperature | 5 - 30 °C | TDS: 5°C - 30°C |
Note: All listed values are typical and may vary by batch. Values based on MacDermid Alpha official TDS. Independent qualification testing is required prior to production use. "Cadmium, Lead, Nickel and Phthalate free" as used herein means these substances are not intentional ingredients and are not intentionally added. Trace amounts may be present.
Recommended Processing Conditions
| Parameter | Recommended Value | TDS Reference |
| Mixing Prior to Use | Thoroughly mix to redisperse solids | TDS: thoroughly mix |
| Screen Mesh | 325 mesh | TDS: 325 |
| Printing Methods | Reel-to-reel, semi-automatic, manual | TDS: Reel-to-reel, semi-automatic, manual |
| Drying (Box Oven) | 120–130°C for 6 minutes | TDS: 120-130°C for 6 minutes |
| Drying (Reel-to-Reel) | 140°C for 1–1.5 minutes | TDS: 140°C for 1-1.5 minutes |
| Clean-up Solvent | Ethylene glycol or Diacetate | TDS: Ethylene glycol or Diacetate |
| Thinner | Micromax 3610 | TDS: Micromax 3610 |
| Work Life | > 1 hour | TDS: > 1 hour |
Handling and Storage Recommendations
| Storage Rules | Store tightly sealed in a clean, stable environment at 5-30°C. | TDS: 5°C - 30°C |
| Shelf Life | 6 months in unopened containers from date of shipment. | TDS: 6 months |
| Pre-use Preparation | Thoroughly mix prior to use. Some settling of solids may occur during storage. | TDS: thoroughly mix |
| Transportation | Under normal shipping conditions, no temperature control is expected. For extended transport periods, confirm product suitability. | TDS: normal shipping conditions |
Official Technical Documentation
| Document Type | Document Introduction | Document Request |
| TDS | MacDermid Alpha Micromax 5028B original factory technical data sheet | Request TDS |
| COA | Batch-specific certificate of analysis | Request COA |
| SDS | Safety Data Sheet for handling and storage | Request SDS |
Frequently Asked Questions
What does "cadmium, lead, nickel and phthalate free" mean for 5028B?
Per the TDS, these substances are not intentional ingredients and are not intentionally added to 5028B. Trace amounts may still be present. Customers with strict compliance requirements should confirm against their own regulatory thresholds.
How does 5028B differ from 5028?
Both share the same silver conductor platform and core electrical data. The 5028B version adds the cadmium, lead, nickel, and phthalate free declaration from the Product benefits section of its TDS.
Why is 5028B suited to fast-curing production lines?
The TDS positions 5028B for applications requiring high conductivity or fast curing. Reel-to-reel drying runs at 140°C for 1–1.5 minutes, which supports short cycle times on continuous lines.
How conductive is the cured 5028B film?
Resistivity is 12 mΩ/sq or less at 25μm. After a 180° crease, resistivity remains below 100 mΩ/sq.
Can 5028B be run on reel-to-reel equipment?
Yes. Reel-to-reel is a listed printing method, with a TDS-documented drying condition of 140°C for 1–1.5 minutes.
What thinner should be used with 5028B?
Micromax 3610 is the listed solvent or thinner. Using the specified thinner keeps printability and cured film properties consistent.
Which substrates are recommended for 5028B?
Polyester, paper, and epoxy glass are listed. Polyester is the substrate used for the typical physical properties in the TDS.
Get MacDermid Alpha Micromax 5028B Bulk Pricing and Technical Support
We supply authentic MacDermid Alpha Micromax 5028B silver conductor ink for membrane switch and flexible circuit programs. Contact our team for bulk quotations, sample availability, technical documentation, and application support.
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Disclaimer: All technical data on this page are for general guidance only and are not product specifications. Buyers must carry out independent trials and verify suitability before bulk ordering. Actual values may vary between production lots. "Cadmium, Lead, Nickel and Phthalate free" as used herein means these substances are not intentional ingredients and are not intentionally added. Trace amounts may be present.
