Table 1 Materials used for the Hayabusa2 clean room and clean chambers

Fluorene resin, Barium plate steel

Walls and ceiling of clean room

Silicon

Caulking agent

ADC12, Ni–Cr coating

Grating floor

Epoxy resin

Floor paint

Soda lime glass

Windows for walls

Stainless steel 316L EP, Stainless steel 304 BA w/acid cleaning

N₂ and compressed air gas pipe

Zinc steel

Local ventilation

Boron free ULPA

FFU filters for recycling nitrogen purifiers

CC

Stainless steel 304

Clean chambers, vacuum line

CC

A6061

Jigs and tools used for handling samples

CC

Viton

Sealing for sub-chambers and sample containers

CC

Viton-coated butyl

Gloves for clean chambers

CC

Gold

References for IR spectrometer, terminals of wires

CC

PTFE

Electronic insulators, reference material for an optical microscope, jigs

CC

PFA tube

Pipes for nitrogen gas lines of desiccators

CC

Oxygen-free copper

Gasket for clean chambers

CC

Tempered glass

Clean chambers

CC

Quart glass

Viewports, containers for samples

CC

Sapphire glass

Viewports, containers for samples

CC

Nickel–chrome–molybdenum steel

Hex keys

CC

Kapton film

Covering of clean chambers for insulation during baking

CC3-2

Silver solder (Ag, Au, and Zn)

Sampling tool for mm-size grains

CC3-2

PEEK

Connectors for power and signal wires, a pair of tweezers for reference weights

CC4-2

Nylon tube

Pipes for compressed air

Nytril

Gloves

Steel plate w/melamine-baking finishing

Cabinets for instruments

Aluminum foil

Covering of clean chambers for thermal homogenization during baking

Glass fiber

Insulators for baking heaters

Acryl resin

Main materials for glove boxes

Teflon grease

Used for lubrication in clean rooms

Ulvac Super Z300

PVC

Main materials for furniture in acid/alkali cleaning room

PE

Plastic bags

PP

Cases for tools and consumables

Polyester

Clean suits, clean cloths

Polyurethane

Wheels of cabinets and wagons, soles of clean boots for workers

Non-woven textile

Wipers, hairnets and masks