Hot-filled foods

Engineering Uses Fibres, fibrillated filaments, pipes, sheets, cable, chute linings, guard rail coatings. Commodity Applications Hot-filled food and meat packaging. 

Types of internal enamel for food containers include oleoresins, vinyl, acryflc, phenoHc, and epoxy—phenoHc. Historically can lacquers were based on oleoresinous products. PhenoHc resins have limited flexibiHty and high bake requirements, but are used on three-piece cans where flexibiHty is not required. Vinyl coatings are based on copolymers of vinyl chloride and vinyl acetate dissolved in ketonic solvents. These can be blended with alkyd, epoxy, and phenoHc resins to enhance performance. FlexibiHty allows them to be used for caps and closures as weU as drawn cans. Their principal disadvantage is high sensitivity to heat and retorting processes this restricts their appHcation to cans which are hot filled, and to beer and beverage products. 

Blow-molded containers, hot fill applications for, 20 50-52 Blow molded food packaging, 18 49-51 Blow-mold-fill-seal food packaging, 18 51 Blow molding, 10 179, 193-194 19 553-554 23 399 ABS, 1 427 HDPE, 20 171-172 LDPE, 20 237 LLDPE, 20 200... 

The other severe problem in the application of PET regarding food containers or bottles is that these products cannot be hot-filled. This limitation is caused by the low Tg of PET, which causes shrinkage during hot-filling. Alternatively, multilayer containers can overcome the problems, but, however, at higher manufacturing costs. PET in combination with an intermediate layer of poly(ethylene-co-vinyl alcohol) (PEVOH) or polybutylene has been used in such... 

Packaging films (extruded, blown, and cast) are used in pressure-sensitive tapes and electrical applications and as replacements for cellophane and glassine films in liners for cereal boxes, wraps for snack foods, cigarettes, bread, and cheese. Blow-molded containers are used in applications where the higher use temperature of polypropene is needed (compared to HDPE), such as in packaging of syrups that are hot-filled. 

PB film is usually made by the blown film process, but also can be cast oil drill lolls. Film applications include food and meat packaging, compression wraps, and hot-fill containers. The material can be formulated to provide a wide range of seal strengths for peelable or easy-opening packaging. 

Application E PTA (Eastman polymer-grade terephthalic acid) is an excellent raw material for engineering plastics and packaging materials, bottles, other food containers including hot fill, as well as films. The process is proven to be suitable for the production of all kinds of polyester fibers and containers without limitation, at international first-grade quality. 

In the hot-filling technique, which is being used as a cheap alternative to asceptic packaging, food is cooked or pasteurized by heating at a high enough temperature to kill the bacteria and then placed into the container at a temperature above 80°C to kill all the bacteria in the container. With this method flexible materials can be used to replace metal cans at a reduced cost. 

Hot-fill pouches are used for both low- and high-acid applications. Heinz Company s form-fill seal Pouch Pack, which is claimed to give a shelf life of one year, has a web of 3-mil LLDPE, ethylene-acrylic acid copolymer, 35-gauge foil, ethylene-acrylic acid copolymer, and biaxially oriented nylon, from inside outward. The Pouch Pack system from Du Pont offers pouches of sizes 4 oz to 1.5 L to fill a range of high-and low-acid food applications at various temperatures, including fruit toppings at 80°C. 

Uses For extrusion coating applies, incl. foil-containing shampoo, toothpaste, towelette, condiment, and misc. non-food pouches and sachets, snack structures, toothpaste tubes, cable shield wrap, aseptic and hot-filled cartons other foil, metalized film, or paper coatings as heat seal or tie layer food-contact polymers Regulatory FDA 21 CFR 177.1330 compliant Properties Pellets sp.gr. 0.93 melt flow 10.0 dg/min f.p. 84 C m.p. 103 C Vicat soften, pt. 86 C 8.7% methacrylic acid Precaution Do not use in medical applies, involving permanent implantation in human body Nucrel 1214 [DuPont]... 

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