General synthetic fibers

[1] Nylon
■ Materials	・6TYP　・66TYP　・610TYP　・612TYP
■ Chemical 　resistance	・Dissolves in concentrated hydrochloric acid and concentrated sulfuric acid ・Very little corrosion from alkalis *(except strong alkalis) ・Soluble in phenol formates and distends in glacial acetic acid.

■ Heat resistance

* Heat resistance is inferior, so it is unsuitable for use at high temperatures
　(up to around 80°C. The limit may vary with other conditions).

■ Characteristics

TYP	Water supply rate	Specific gravity	Characteristic
6	10.7％	1.14	Tensile strength is high, but rigidity is low
66	4～4.5％	1.14	Melting point is high
610	2.5％	1.08	Low water supply rate and resistant to moist conditions
612	2.5％	1.06	Low water supply rate and resistant to moist conditions

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This is the most widely used of the general synthetic fibers for brushes. It has high wear resistance, elasticity, and recovery from bending.

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It is most commonly used with neutral or weak alkaline solvents for cleaning, but its resistance to acids is poor.

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Heat resistance varies between types of nylon, but it is usable below around 80°C

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Can handle use with abrasive particles

■Main applications	・Cleaning steel plates　・Cleaning glass　・Spinning　・For paper manufacturing　・Belt cleaning　・Woodwork surface cleaning ・Finishing wood surfaces　・Floor painting　・Vehicle cleaning　・Conveyors　・Pipe cleaning　・Bottle cleaning
■Corresponding wire diameter	From Φ0.05 (varies between types)

[2] Polypropylene (PP, △PP)

■ Chemical resistance

・Resists acids and alkalis, but dissolves in general solvents

■ Heat resistance

・Melting point 165°C　・Limit temperature for use 60°C

■ Characteristics

・	The lightest synthetic fiber for brushes, with 0.91 specific gravity, it is relatively strong against acids and alkalis but has lower heat resistance than nylon, and is inferior in wear resistance
・	Fibers with a triangular cross section are used for road cleaning

■ Main applications

・Floor cleaning　・Vehicle cleaning　・Belt cleaning　・Dye brushes　・Paint brushes　・Polishers
・Brushes for spinning and papermaking　・Cleaning steel plates

■Corresponding wire diameter

From Φ0.07 up to 30,000 denier

[3] Polyester (PET, PBT)
■ Characteristics	・Acid resistance is superior to nylon, and water absorption is low, so moisture has little effect on stiffness
	・Can handle use with abrasive particles
■ Corresponding wire diameter	From Φ0.05

[4] Polyvinyl Chloride (PVC)
■Chemical resistance	・Resists acids and alkalis
■ Heat resistance	・Melting point 165°C
■ Characteristics	・Fibers are stiff, with superior chemical resistance, but their heat resistance is weak and wear resistance and bending recovery are somewhat inferior
■Main applications	・Vehicle cleaning　・For exterior cleaning of bottles　・For printing presses　・Conveyor belt cleaning
■Corresponding wire diameter	Corresponding wire diameter from Φ 0.1

[5] Kanegoat (acrylic fiber)
■Characteristics	・A synthetic fiber developed for use in domestic paintbrushes
■Corresponding wire diameter	Φ0.05 and 0.075