What is an EVOH Barrier?
Ethylene vinyl alcohol copolymer (EVOH) barriers comprise a family of extrudable plastic barrier materials with excellent barrier properties for oxygen and a variety of other gases and volatile products (flavor barrier). Gantrade is proud to market the Evasin™ family of EVOH extrudable plastic barrier materials from Taiwan’s Chang Chun Petrochemicals.
Gantrade offers the following EVOH barrier grades:
- EV2751F
- EV2904F/V
- EV2951F/V
- EV2951FR
- EV3251F/V
- EV3251FT
- EV3851F/V
- EV4405F/V
- EV4451F/V
*F -without lubricant. V - with lubricant.
What is EVOH used for?
Based on its excellent gas barrier properties, manufacturers may coextrude with or laminate EVOH to polyolefin resins for food packaging and industrial applications. EVOH barrier grades are also great for applications in food packaging and agricultural film sectors among others. EVOH copolymer also has excellent chemical and oil resistance that enables it to be used as the fuel barrier layer in low emission fuel tanks for automobiles and portable gas containers.
What are the properties of Gantrade’s Evasin™ EVOH oxygen barrier products?
| Grade 1) |
Ethylene Content |
Density |
Tm |
Tg |
MFI |
OTR 3) |
Application 4) |
| Mole % |
g/cm3 |
°C |
°C |
g/10 min 2) |
|
|
| EV2751F |
27 |
1.19 |
190 |
63 |
4 |
0.1 |
Cast film, Blown film |
| EV2904 F or V |
29 |
1.2 |
188 |
65 |
8.5 |
0.3 |
Cast film, Pipe, Bottles |
| EV2951 F or V |
29 |
1.2 |
188 |
65 |
3 |
0.3 |
Cast Film, Blown Film, Pipe, Bottles |
| EV2951FR |
29 |
1.17 |
188 |
62 |
1.8-4.2 |
0.5 |
Retort Grade, Film, Bottles |
| EV3251 F or V |
32 |
1.19 |
183 |
62 |
1.6 |
0.4 |
Cast film, Blown film, Sheet, Blow molding, Tube |
| EV3251FT |
32 |
1.17 |
183 |
57 |
4.3 |
0.5 |
Sheet & Thermoforming |
| EV3851 F or V |
38 |
1.17 |
173 |
58 |
1.6 |
0.7 |
Cast film,Blown film, Sheet, Blow molding |
| EV4405 F or V |
44 |
1.14 |
165 |
55 |
1.14 |
1.5 |
Sheet, Film, Tubes |
| EV4451 F or V |
44 |
1.14 |
167 |
56 |
2 |
1.35 |
Film, Molding, Thermoforming |
1) F: EVOH with Lubricant ; V: EVOH without Lubricant
2) 210°C, 2160g for EV2904 F/V and EV2951FR; 190°C, 2160g for the rest of grades
3) 20 °C, 65%RH, ISO14663-2, unit: cc 20um/m2-day-atm
4) Food contact regulatory status EVASIN contains no heavy metals or other harmful substances, and meets the standards of FDA 21, C.F.R. Section 177.1360. / European Commission Directive No. 10/2011 |
What are the attributes of EVOH barriers?
EVOH barriers have several advantages that make them the preferred choice for applications as diverse ads food packaging, agricultural film, and fuel tanks in the automotive industry:
- Excellent Oxygen Barrier
- High Transparency
- Flavor Barrier
- Low Gel Performance
- Weather Resistance
- Oil/Solvent Resistance
- High Rigidity
- Easier Processability - Lower back pressure
What are the packaging options for EVOH?
Packaging for EVOH comes in two options from Gantrade:
- Gaylord boxes
- 25 kg bags
How do manufacturers apply EVOH barriers?
Manufacturers typically apply EVOH barriers with different kinds of ethylene content in various barrier products by the fabrication process methods of blown or cast co-extrusion, co-extrusion lamination, or co-extrusion coating to form bottles, sheet for thermoforming, films, cast films, pipes, tubes or fibers. Manufacturers can process polymers and resins, and packaging performance can be optimized by selecting the appropriate grade of EVASIN® resins.
How is EVOH processed with resins?
The following EVOH resin processing methods have been broadly adopted by extrusion companies:
- Monolayer film extrusion (blown or cast)
- Co-extruded film extrusion (blown or cast)
- Sheet co-extrusion
- Co-extrusion blow molding
- Co-extrusion coating
- Laminating
- Injection molding
You are also welcome to call or email our sales manager for a comprehensive overview of Evasin™ EVOH. Contact Randy Altman, Sales Manager, at 201-675-2891 or raltman@gantrade.com.
