Air Filters and Chemical Filtration

Mini-Pleat HEPA Filter

A lightweight separatorless HEPA panel that uses hot-melt-spaced microglass pleats to maximize active area and minimize airflow resistance.

Separatorless Mini-Pleats
Low Pressure Drop
Lightweight Aluminum Frame
Compact Cleanroom Format

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Product Introduction

The mini-pleat HEPA filter uses microfine glass-fiber media folded into closely spaced pleats and stabilized with continuous thermoplastic beads instead of corrugated metal separators. Precise bead spacing prevents media-to-media contact and creates many narrow, uniform flow channels. A polyurethane seal bonds the single pack into an extruded anodized-aluminum frame, while optional faceguards protect the exposed surfaces. The high media area and shallow profile make this design suitable for cleanroom ceilings, laminar-flow equipment and compact terminal housings.

Key Features

Hot-melt separators replace corrugated metal sheets and reduce both weight and airflow obstruction.

Closely controlled pleat geometry provides a large active HEPA area in a shallow panel.

Extruded aluminum cell sides keep the filter square while resisting normal cleanroom cleaning agents.

Polyurethane potting seals the complete media perimeter without leaving internal bypass paths.

Customer Product Concerns

A mini-pleat HEPA panel must combine delicate high-efficiency media with precise spacing and reliable edge sealing.

Metal-separated HEPA cells are too heavy for dense ceiling-grid layouts.Separatorless hot-melt pleats and extruded aluminum sides reduce weight while retaining media area.

Closely packed media faces touch and create blocked channels.Continuous calibrated adhesive beads maintain exact spacing along every pleat.

Thin HEPA media tears when the panel is carried by its face.Recessed media and optional protective grids isolate the pleat surface from routine handling.

Leakage develops at the junction between the pack and aluminum extrusion.Four-sided urethane potting forms a continuous bond inside the frame cavity.

Typical Applications

Cleanroom ceiling filter gridsLaminar-flow workstationsFan filter unitsHospital operating suitesSemiconductor and pharmaceutical process areas

Technical Parameters

Typical construction ranges for a separatorless mini-pleat HEPA panel are shown below.

Core Material	Microfine glass-fiber HEPA media with continuous thermoplastic bead separators
Panel Thickness	53, 70 or 100 mm mini-pleat pack depth
Effective Width	305-610 mm cleanroom module width
Maximum Length	Up to 1220 mm panel length with reinforced aluminum extrusion
Steel Facing Thickness	0.40-0.60 mm powder-coated steel or stainless-steel protective faceguard
Core Density	Approximately 80-140 kg/m³ nominal assembled mini-pleat pack density
Thermal Conductivity	Approximately 0.034-0.041 W/(m·K) for dry resin-bonded mini-pleat microglass media
Surface Finish	White microglass media in clear anodized aluminum with optional white faceguards
Joint Type	Hot-melt-spaced mini-pleat pack fully potted into an extruded-aluminum perimeter frame
Customization	Available based on the intended application and operating environment.

Available Options

H13, H14 or ULPA-grade media53 mm, 70 mm or 100 mm pack depthMicroglass or low-resistance membrane mediaGasket, gel-channel or integral knife-edge frame

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