News Center

what are PBT and PET and PP and nylon for brush?

First, what is the definition of each material:

PBT Polybutylene terephthalate (PBT)

Polybutylene terephthalate (PBT) is a thermoplastic engineering polymer that is used 

as an insulator in the electrical and electronics industries. It is 

a thermoplastic (semi-)crystalline polymer, and a type of polyester. PBT is resistant to 

solvents, shrinks very little during forming, is mechanically strong, heat-resistant up 

to 150 °C (or 200 °C with glass-fibre reinforcement) and can be treated with flame 

retardants to make it noncombustible. It was developed by Britain's Imperial Chemical 

Industries (ICI).[2]

For more details, please check:

PET Polyethylene terephthalate

Polyethylene terephthalate (sometimes written poly(ethylene terephthalate)), commonly 

abbreviated PET, PETE, or the obsolete PETP or PET-P, is the most 

common thermoplastic polymer resin of the polyester family and is used in fibres for 

clothing, containers for liquids and foods, thermoforming for manufacturing, and in 

combination with glass fibre for engineering resins.

It may also be referred to by the brand names Terylene in the UK,[5] Lavsan in Russia 

and the former Soviet Union, and Dacron in the US.

For more details, please check:

PP Polypropylene (PP)

Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a 

wide variety of applications. It is produced via chain-growth polymerization from 

the monomer propylene.

Polypropylene belongs to the group of polyolefins and is partially crystalline and non-polar. 

Its properties are similar to polyethylene, but it is slightly harder and more heat resistant. It 

is a white, mechanically rugged material and has a high chemical 

resistance.[1] Polypropylene is the second-most widely produced commodity 

plastic (after polyethylene) and it is often used in packaging and labeling. In 2013, the 

global market for polypropylene was about 55 million tonnes.


For more details, please check:


Nylon is a generic designation for a family of synthetic polymers, based 

on aliphatic or semi-aromatic polyamides. Nylon is a thermoplastic silky material[1] that 

can be melt-processed into fibers, films, or shapes.[2]:2 It is made of repeating units linked 

by amide links[3] similar to the peptide bonds in proteins. Nylon polymers can be mixed 

with a wide variety of additives to achieve many different property variations. Nylon 

polymers have found significant commercial applications in fabric and fibers (apparel, 

flooring and rubber reinforcement), in shapes (molded parts for cars, electrical equipment, 

etc.), and in films (mostly for food packaging).[4]

For more details, please check:

Regards of paint brush Industry, most of filament is made of PBT and 

PET for following reasons:

1. PBT and PET can be tapered by Chemical material.

2. PBT is soft, PET is hard, which combined together would be get the best effects 

for extruding the filaments

3. The Characteristic of PBT and PET (High Temperature resistance and elasticity) is 

very suitable for making painting brush

Most of brush filament is made for tapering because tapering would be making paint 

brush paint more smoothly.

The following are the chart of characteristic of each material:


Generally, what we used this raw material use for?

1. PBT /PET: Paint brush, Artist paint brush, broom brush, polish brush, bottom 

brush, toothbrush, horse brush, hair brush

2. PET: cheaper broom brush, cleaning brush, horse brush

3. PP: Clean brush, horse brush