Summary
- ECTFE/ETFE is rated better with
- Mineral acids (+80 points); Ketones and aldehydes (+79 points); Oxidising agents and halogens (+71 points); Halogenated hydrocarbons (+68 points); Alkalis (+55 points); Esters and ethers (+38 points); Organic acids (+30 points); Amines and nitrogen compounds (+22 points)
- Within 10 points of each other
- Salts and salt solutions; Alcohols and glycols; Fuels, mineral oils and aliphatic hydrocarbons; Foods and beverages
Points are the difference in the share of rows rated A or B.
The two materials
PETG
Polyethylene terephthalate glycol (co-polyester)
PETG is a co-polyester for clear containers. Strong acids and alkalis and most organic solvents attack it.
Rated rows: 619. A 55 %, B 23 %, C 4 %, D 18 %
ECTFE/ETFE
Ethylene chlorotrifluoroethylene / ethylene tetrafluoroethylene
ECTFE and ETFE are tough fluoropolymers with broad resistance. Hot amines and some chlorinated solvents at elevated temperature are their main limits.
Rated rows: 374. A 94 %, B 6 %, C 0 %, D 0 %
Share of rows rated A or B, by chemical class
How often the two ratings agree
Chemical classes were assigned by this site, not by the source. Mixtures and trade products without a clear class are not counted.
By chemical class
| Chemical class | PETG: rated A or B | ECTFE/ETFE: rated A or B |
|---|---|---|
| Mineral acids | 20 % (41 rows) | 100 % (37 rows) |
| Organic acids | 70 % (33 rows) | 100 % (33 rows) |
| Alkalis | 45 % (20 rows) | 100 % (14 rows) |
| Salts and salt solutions | 100 % (159 rows) | 100 % (114 rows) |
| Oxidising agents and halogens | 29 % (38 rows) | 100 % (17 rows) |
| Alcohols and glycols | 100 % (40 rows) | 100 % (25 rows) |
| Ketones and aldehydes | 21 % (24 rows) | 100 % (14 rows) |
| Esters and ethers | 57 % (28 rows) | 95 % (20 rows) |
| Amines and nitrogen compounds | 78 % (9 rows) | 100 % (9 rows) |
| Fuels, mineral oils and aliphatic hydrocarbons | 98 % (65 rows) | 100 % (13 rows) |
| Vegetable and animal oils, fats, essential oils | 100 % (34 rows) | – |
| Halogenated hydrocarbons | 32 % (25 rows) | 100 % (16 rows) |
| Foods and beverages | 100 % (43 rows) | 100 % (26 rows) |
Where the ratings differ most
Rows where the two ratings at 20 °C are at least two grades apart: 62 in total, the first 40 shown.
| Chemical | Concentration | PETG | ECTFE/ETFE |
|---|---|---|---|
| Acetic Acid | 90 % | D | A |
| Acetonitrile | D | A | |
| Acetophenone | D | A | |
| Acrylonitrile | D | A | |
| Aqua Regia | D | A | |
| Battery Acid | 38 % | D | A |
| Benzaldehyde | D | A | |
| Benzene | D | A | |
| Bitter Almond Oil | D | A | |
| Bromine | D | A | |
| Chlorine | 10 % wet | D | A |
| Chlorine Water | D | A | |
| Chloroacetic Acid | D | A | |
| Chromic Acid | 50 % | D | A |
| Chromic-Sulfuric Acid | concentrated | D | A |
| Cresol | D | A | |
| Ethyl Acetate | 100 % | D | A |
| Ethylene Dichloride | D | A | |
| Fluorine | D | A | |
| Fluorosilicic Acid | 32 % | D | A |
| Hydrobromic Acid | 50 % | D | A |
| Hydrochloric Acid | 35 % | D | A |
| Hydrochloric Acid | concentrated | D | A |
| Hydrofluoric Acid | 4 % | D | A |
| Hydrofluoric Acid | 50 % | D | A |
| Methyl Propyl Ketone (2-Pentanone) | D | A | |
| Nitric Acid | 66 % | D | A |
| Nitric Acid | 70 % | D | A |
| Perchloric Acid | 70 % | D | A |
| Phenol | 100 % | D | A |
| Potassium Hydroxide | 1 % | D | A |
| Potassium Hydroxide | 10 % | D | A |
| Potassium Hydroxide | 50 % | D | A |
| Potassium Hydroxide | concentrated | D | A |
| Sodium Hydroxide (Caustic Soda) | 50 % | D | A |
| Sulfuric Acid | 40 % | D | A |
| Sulfuric Acid | 60 % | D | A |
| Sulfuric Acid | 80 % | D | A |
| Sulfuric Acid | 95 % | D | A |
| Trichloroethane | D | A |
Rating scale
- A very good resistance
- B good resistance
- C limited resistance
- D not resistant
- – no data
- K no general statement possible
A rating marked * is an estimate in the source, not a test result. An estimate is given as one value without a temperature.
More comparisons
Frequently Asked Questions
Is PETG or ECTFE/ETFE more chemical-resistant?
Of 294 chemicals rated for both materials at 20 °C, PETG and ECTFE/ETFE share the same rating in 162 rows (55 %). PETG is rated better in 3 rows and ECTFE/ETFE in 129 rows.
How do PETG and ECTFE/ETFE compare for chemical resistance?
Based on 294 chemicals tested for both: PETG is rated better with –. ECTFE/ETFE is rated better with Mineral acids, Ketones and aldehydes, Oxidising agents and halogens, Halogenated hydrocarbons. They perform similarly with Salts and salt solutions, Alcohols and glycols, Fuels, mineral oils and aliphatic hydrocarbons, Foods and beverages.
About this data
The ratings come from the chemical resistance list published by Bürkle GmbH, which compiled them from raw-material manufacturers’ data. They describe laboratory tests on the raw material at 20 °C and 50 °C.
A finished part also sees pressure, mechanical stress, welds and mixtures that a laboratory test does not. Treat the rating as a first filter and test under your own conditions before relying on it.