Ethylene Acrylic Acid EAA

As the content of AA increases, the crystallinity decreases, which implies that clarity also Increases. Similarly, adhesion strength increases because of the increase in polarity, and the heat seal temperature decreases due to the decrease in crystallinity. 

Films of EAA are also used in flexible packaging of meat, cheese, snack foods, and medical products in skin packaging and in adhesive lamination. Extrusion coating applications include condiment and food packages, coated paperboard, aseptic cartons, composite cans, and toothpaste tubes. FDA regulations permit use of up to 25% acrylic acid for copolymers of ethylene in direct food contact. 

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The metallic layers were examined either by conventional or cross-section TEM in a Jeol 200 Cx microscope. For the cross section preparation a sandwich of two laminates is made, glued face to face with an epoxy, cut in small pieces, mechanically polished, and then ion milled to a final TEM observation thickness. The plane section TEM sample are prepared by dissolving the PET in trifluoroacetic acid for 5 to 10 mn. The area observed, on plane section TEM, for the grain size calculation is close to 0.2 urn. For the adhesion measurements, test pieces consist of aluminum support (1 mm thick) double sided tape (Permacel P-94) PET (12pm) / evaporated aluminum/ ethylene acrylic acid (EAA) copolymer film. These laminates are prepared for the peel test by compression under 1.3 105 N.m2 at 120°C for 10 seconds. The peel test is performed by peeling the EAA copolymer sheet from the laminate in an INSTRON tensile tester at 180° peel angle and 5 cm min peel rate. 

Paperboard Aluminium foil Metallised frkn Ethylene acrylic acid (EAA)... 

Ethylene acid polymer is obtained by the copolymerisation of ethylene with either acrylic or methacrylic acid. These copolymers are somewhat similar to LDPE and are found as ethylene acrylic acid (EAA) and ethylene methacrylic acid (EMA). Both are used in various packaging applications, i.e. flexible packaging, adhesive laminating, hot melts, and heat seal coatings. 

Ethylene-Acrylic Acid (EAA). The addition of acrylic acid (15-20%) to ethylene results in a copolymer with an ionic nature, which offers improved adhesive properties. It is used in applications similar to that of EVA and primarily as a hot-melt adhesive. 

Adhesion Dow Primacor copolymers are designed for lasting adhesion to aluminum foil and other polar substrates. Ethylene acrylic acid (EAA) copolymers also offer significant benefits as a sealants for packaging fatty and greasy products. 

LDPE, low-density polyethylene EVA, ethylene vinyl acetate copolymer Acid copolymers such as ethylene acrylic acid (EAA) or ethylene methacrylic acid (EMA) copolymers... 

This indicates that the induction time reduces exponentially with temperature. Curve A in Fig. 6.29 is an HDPE as received from the manufacturer and curve B is an ethylene acrylic acid (EAA) as received from the manufacturer. The HDPE can be processed at 200°C without noticeable degradation however, EAA shows clear signs of degradation at that temperature. It should be processed at about 160°C to avoid degradation. 

Otey has studied the interactions between the ethylene-acrylic acid (EAA) copolymer and gelatinised starch since 1977 [7-83]. 

Arvanitoyannis, L, Psomiadou, E., Biliaderis, C.G, Ogawa, H., Kawasaki, H. and Nakayama, O. (1997). Biodegradable films made from low density polyethylene (LDPE), ethylene acrylic acid (EAA), polycaprolactone (PLC) and wheat starch for food packaging applications Part 3. Starch-Starke, 49,306-322. 

The polyethylenes can be further classified as branched polyethylenes and hnear polyethylenes. The low density polyethylene (LDPE), ethylene vinyl acetate (EVA), ethylene acrylic acid (EAA) and ionomers come under the category of branched polyethylenes. The linear polyethylenes include high density polyethylene (HOPE), linear low density polyethylene (LLDPE), metallocene polymers, and so on. Marty new PE types are also available, which are developed by combinations of copolymers or by controlling molecular geometry and molecular weight distributioa... 

Amylolytic Arthrobacter bacteria have the ability to utilize starch as the sole carbon source in liquid culture media. One of a group of bacteria designed as LD76 degraded up to 80% of starch in starch-PE-ethylene acrylic acid (EAA) plastic films in 60 d in a liquid culture media, but PE and EAA components remained largely nondegraded [56]. Lactobacillus amylovaras bacterium, isolated from corn waste fermentation. 

Ethylene Acrylic Acid (EAA) - EAA copolymers have poorer heat stability and are more expensive than EVA but have superior adhesion to metals and... 

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