1

natural rubber

NR

-50 ～80

Salts, hydrochloric acid, metal   coating solution, water, wet chlorine

2

Neoprene

CR

-40 to 80

Animal oils, vegetable oils,   inorganic lubricants, and corrosive muds with large changes in pH

3

Butyl rubber

IIR

-30 to 100

Resistant to corrosion, abrasion and   most inorganic acids and acids

4

Nitrile rubber

NBR

-30 to 90

Water, oil, waste liquid, etc.

5

Ethylene propylene rubber

(Ethylene propylene rubber)

EPDM

( EPM )

-40 to 120

Brine, 40% boron   water, 5% to 15% nitric   acid and sodium chloride, etc.

6

Chlorosulfonated polyethylene   synthetic rubber

CSM

-20 ～100

Good acid resistance

7

Silicone Rubber

SI

-70 ～200

High temperature resistance, low   temperature, good electrical insulation, large chemical inertia

8

fluororubber

FPM

( Viton )

-23 ～200

Resistant to medium corrosion better   than other rubbers, resistant to radiation, acid

9

Teflon

PTFE

( TFE )

-196 ～200

Excellent heat and cold resistance,   resistance to general chemical solvents and almost all liquids

10

Fusible polytetrafluoroethylene

PFA

Fs-4100

≤180

Various concentrations of sulfuric   acid, hydrofluoric acid, aqua regia, high temperature concentrated nitric   acid, various organic acids, strong alkali, etc.

11

Polyperfluoroethylene

FEP

( F46 )

≤150

Excellent chemical resistance,   sunlight and weather resistance at high temperatures

12

Polyvinylidene fluoride

PVDF

(F2)

-40 to 150

Good chemical resistance , excellent   sunlight and weather resistance. It is the strongest and hardest   fluoroplastic.

13

Teflon

PCTFE

(F3)

≤190

Good chemical resistance , resistance   to sunlight, and excellent weather resistance , can   be 198 continuous   use ℃, the strength and hardness than the F46 and PTFE high

14

Polyolefin

PO

≤100

Resistant to various concentrations   of acids, alkalis, salts, and certain organic solvents, corrosion resistance,   antistatic, non-toxic

15

Polypropylene

PP

-70 ～100

Excellent chemical resistance and   resistance to stress cracking resistance , poor   weatherability

16

Polyetheretherketone

PEEK

-46 ～300

It is a high-strength,   high-temperature-resistant resin with excellent mechanical properties and   chemical resistance, excellent abrasion resistance and dimensional stability   for valve seals

17

Para-phenylene

PPl

≤300

Basically the same as PTFE

18

Nylon (polyamide)

NYLON

≤80

Alkali and ammonia resistance