Technological Cleanliness — How to Eliminate Contamination in Manufacturing

Technological cleanliness is the discipline of ensuring that materials, components, and products meet defined contamination limits throughout the manufacturing process. It encompasses the prevention, detection, and removal of particles, fibers, and other contaminants that could compromise product quality, appearance, or function. Industries like automotive, pharmaceutical, electronics, and packaging have specific cleanliness standards (e.g., VDA 19 in automotive) that require verified particle counts below defined thresholds. Achieving technological cleanliness involves controlling the environment, the process, and the materials — with static elimination and web cleaning playing central roles.

Static electricity is one of the primary enemies of technological cleanliness. When a surface is electrostatically charged, it acts like a magnet for airborne particles — dust, fibers, and debris are attracted from the surrounding air and stick to the charged surface. A surface charged to just 3,000 V attracts visible contamination. At 10,000 V or above, the attraction force is strong enough to pull particles from several centimeters away. This is why surfaces that have been carefully cleaned can become re-contaminated within seconds if they carry static charge. Effective cleanliness strategies must include static elimination as a first step.

Three categories of equipment work together to ensure technological cleanliness: 1) Ionizers — neutralize static charge so surfaces no longer attract particles. 2) Web cleaning systems — physically remove particles from moving substrates. These include non-contact cleaners (like Meech CyClean) that use air flow and vacuum extraction, and contact cleaners (like Meech VacClean) that use elastomer rollers with vacuum. 3) Surface cleaning systems — air knives (like Meech JetStream) and rinsing systems (like IonRinse) that clean 3D objects, containers, and components. The most effective approach combines ionization with mechanical cleaning — first neutralize the charge, then remove the particles. Animat's dedicated field engineer can assess your line and recommend the optimal combination.

Non-contact web cleaning removes contamination from a moving web (material from roll) without any physical contact with the material surface. The Meech CyClean system uses CFD-optimized (computational fluid dynamics) airflow to lift particles from the surface and capture them in a vacuum extraction system. The process: a boundary layer of air travels with the moving web; the CyClean disrupts this boundary layer, lifts particles free, and extracts them before they can redeposit. Non-contact cleaning is essential for sensitive substrates that could be damaged by physical contact — thin films, coated surfaces, printed materials, and optical-grade substrates.

Contact web cleaning uses elastomer rollers that physically touch the web surface to pick up particles. The Meech VacClean combines contact cleaning with ionization and vacuum extraction — the ionizer neutralizes static (so particles release from the surface), the elastomer roller picks them up, and vacuum extracts them. Contact cleaning is more aggressive than non-contact and removes larger particles more effectively. Use it when: the substrate is robust enough to tolerate roller contact, contamination includes large or embedded particles, or non-contact cleaning alone cannot meet the required cleanliness level. Common applications: cardboard, thick films, metal sheets.

Surface cleaners and ionizers are complementary — each solves a different part of the contamination problem. Ionization neutralizes the electrostatic charge that causes particles to stick to surfaces. Without ionization, cleaning systems have to fight against the attractive force of static — particles are pulled back to the surface immediately after removal. With ionization, particles are loosened and can be removed more easily and permanently. The optimal sequence: 1) Ionize the surface to release particle adhesion. 2) Clean using air knives, web cleaners, or vacuum to physically remove the particles. 3) Ionize again after cleaning to prevent re-contamination from ambient dust.

The automotive industry uses VDA 19 (German Association of the Automotive Industry) and ISO 16232 as the primary cleanliness standards. These standards define how to extract, analyze, and quantify particles on components and assemblies. They specify maximum permissible particle sizes and counts for different component categories — from engine parts to painted body panels. For painted surfaces, even particles as small as 5-10 micrometers can cause visible defects (craters, inclusions). This is why automotive painting lines use extensive ionization and cleaning systems before the paint booth — to achieve particle counts below the VDA threshold.

Sub-micron contamination refers to particles smaller than 1 micrometer (1/1000 of a millimeter) deposited on surfaces during manufacturing. While invisible to the naked eye, these particles cause significant problems in precision industries: semiconductor manufacturing — a single sub-micron particle on a wafer ruins the chip. Optical coatings — particles cause scattering and reduce lens performance. Pharmaceutical packaging — particle contamination in sterile containers is a regulatory failure. Controlling sub-micron contamination requires cleanroom-grade web cleaning combined with effective static elimination — charged surfaces attract sub-micron particles from the air with remarkable efficiency.

Removing particles before painting or printing requires a two-step approach: Step 1 — Static elimination: ionize the surface to neutralize any electrostatic charge. This releases the electrostatic bond holding particles to the surface. Without this step, particles resist removal and immediately re-contaminate. Step 2 — Physical removal: use an air knife system (like Meech JetStream) to blow particles off the surface with a controlled laminar airflow, combined with vacuum extraction to capture the displaced particles. For web-based substrates (roll-to-roll), use a web cleaning system (CyClean or VacClean) positioned immediately before the print or paint station. Timing is critical — the interval between cleaning and the critical process must be as short as possible.

Yes — anti-static equipment (ionizers) is one of the most cost-effective ways to improve technological cleanliness. Static charge is the root cause of particle adhesion in most manufacturing environments. By neutralizing the charge, ionizers address the cause rather than just the symptom. The impact is measurable: studies consistently show that ionization reduces surface particle counts by 50-90%, depending on the environment and process. For best results, combine ionization with mechanical cleaning (web cleaners, air knives). Ionization alone prevents re-contamination; cleaning removes existing contamination. Together, they achieve cleanliness levels that neither can reach alone. Our Meech-trained service engineer can measure your current static levels and recommend the right equipment combination.

CyClean and CyClean-R are both Meech non-contact web cleaning systems, but they are designed for different web path configurations. The standard CyClean is designed for webs running in a free span — a straight section of web with adequate tension between rollers. It requires the web to pass through the cleaning head with sufficient tension to maintain the correct gap. The CyClean-R is specifically designed for webs positioned around rollers or in low-tension applications where the standard CyClean would be less effective. The "R" stands for roller-mount — the cleaning head mounts adjacent to an existing roller, using the roller as a reference surface. CyClean-R is available in three width variants: narrow (100-350 mm), mid (350-600 mm), and wide. Both systems achieve sub-micron particle removal and operate at speeds up to 800 m/min. Choose CyClean for open web paths with good tension; choose CyClean-R when space is limited or web tension is low.

The Meech TakClean is a contact web cleaning system that uses twin elastomer rollers coated with a tacky (adhesive) surface to physically extract contamination from a moving web. The process: the web passes between the tacky rollers, which attract and lift particles from the surface. The particles transfer from the tacky rollers to adhesive cleaning sheets, which are peeled away when saturated — preventing recontamination. TakClean includes two AC ionizing bars (Model A914) at the exit to neutralize static charge after cleaning. It removes particles as small as 0.5 micrometres. Available in single or double-sided configurations. Maximum web speed: 250 m/min. The adhesive sheets are changed based on contamination level — typically at each shift change or between print runs. A compressed air supply (min 3 bar, preferably 5 bar) is required to engage and disengage the adhesive rollers. TakClean is commonly used in combination with VacClean for maximum cleanliness: VacClean removes bulk contamination first, then TakClean handles fine particles.

The Meech RoClean is a contact web cleaning system that uses a precision-engineered non-abrasive rotating brush to physically dislodge contamination from the web surface. The brush material is specifically selected for low water absorption and zero substrate damage. Combined with ionization and vacuum extraction, the RoClean provides deep cleaning suitable for demanding applications. RoClean is specifically designed to work in cleanroom and dry room environments, meeting purity class requirements per ISO 14644-1 — making it the system of choice for lithium-ion battery electrode manufacturing where contamination is critical to cell safety. In battery production, critical cleaning stages include pre-coating, coating roller cleaning, pre-calendaring, post-slitting, and separator film cleaning. Maximum web speed: 500 m/min. Brush speed and direction are controlled via the AHU screen or a dedicated control panel.