What is the difference of 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: https://en.wikipedia.org/wiki/Polyethylene_terephthalate
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: https://en.wikipedia.org/wiki/Polyethylene_terephthalate
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.
[2]
For more details, please check: https://en.wikipedia.org/wiki/Polybutylene_terephthalate
Nylon
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: https://en.wikipedia.org/wiki/Nylon
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