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食品包装材料
[来源:原创] [作者:aowl] [日期:19-04-01] [浏览次数:]

食品包装材料
Food packaging materials
从材料上分为马口铁材料和铝板两种。
There are two kinds of materials: tinplate and aluminium plate.
从制罐程序分为:三片罐(底、盖、身),两片罐(底、身、一次或多次冲拉成形,盒)。
From the process of tank making, it can be divided into three cans (bottom, cover and body), two cans (bottom, body, one or more punching forming, box).
金属罐装食品一一罐头,适合多种食品的包装,贮存时间较长,便于运输及销售,食用方便。从食品上又分为酸性食品和含硫性食品,为了满足酸性食品和含硫性食品的包装要求,罐内必须具有防腐层,通常叫做罐头内涂层,它是在制罐前,在涂料线上将整张马口铁涂布涂料,经烘烤成膜,成为涂料铁,再去制罐。涂料铁除符合卫生要求:无毒、无味、无嗅外,涂膜还必须适应制罐的要求(耐冲击性、韧性、对马口铁的附着性等),实罐的要求(涂膜的致密性、涂膜厚度、抗酸或抗硫性)及特殊产品的要求。
Canned metal food is suitable for packaging of many kinds of food. It has a long storage time, is convenient for transportation and sale, and is convenient for eating. It is divided into acidic food and sulfur food. In order to meet the packaging requirements of acidic food and sulfur food, the tank must have an anticorrosive layer, usually called the inner coating of cans. It is to coat the whole tin on the coating line before canning, then bake it into a film, and then make it into coated iron. In addition to meeting sanitary requirements: non-toxic, tasteless and odorless, coating film must also meet the requirements of tank making (impact resistance, toughness, adhesion to tinplate, etc.), solid tank requirements (film density, film thickness, acid or sulfur resistance) and special products.
我国目前在罐头食品所用的涂料铁可分为:一般酸、硫两用铁:所用涂料为环氧酚醛涂料,它适用于一般的蔬菜、水果、家禽、肉类等。在罐头用涂料铁中,占很大的比例。抗高酸涂料铁:主要是番茄酱用涂料铁,涂膜厚度要达到10克/米“以上。还有磁漆所涂布遮盖性涂料铁,例:铝粉、钦白粉、氧化铁红等所配制的涂料。抗硫涂料铁:为了防止硫化物污染,在涂料中加入能吸收硫化物的氧化锌或碳酸锌。或用铝粉调色,提供遮盖硫斑作用。
At present, the coatings iron used in canned food can be divided into: general acid and sulfur dual-purpose iron: the coatings used are epoxy phenolic coatings, which are suitable for general vegetables, fruits, poultry, meat and so on. The proportion of coated iron for canning is very large. High acid resistant coatings iron: mainly used for tomato paste coatings iron, film thickness to reach 10 g/m or more. There are also coatings covered by magnetic paint iron, for example: aluminum powder, Qinbai powder, iron oxide red and other coatings prepared. Sulfur resistant coating iron: In order to prevent sulfide pollution, zinc oxide or zinc carbonate which can absorb sulfide is added to the coating. Or use aluminium powder to tone, to provide the effect of covering sulphur spots.
脱膜涂料铁:一般是指午餐肉专用涂料铁,它除具有一般罐用涂料铁的性能外,必须具有一种防粘性,使开罐后能顺利地倒出内容物,保持午餐肉的形态。目前使用的脱膜涂料铁从防粘层的成膜机理可分为两种:一种为在一般涂料铁上,再涂布一层防粘层。另一种是将起到防粘作用的合成蜡均匀地混在涂料中,再涂布马口铁上,在烘烤成膜过程中,合成蜡渗出表面,形成一种防粘层。另外,针对产品的特殊需要,还有一些专用涂料铁,如装蘑菇用的M一20涂料铁。装芦笋用的涂料铁,装肉丝用的(两片罐)#51涂料铁等。
Removal coating iron: generally refers to the special coating iron for lunch meat. It has the properties of general tin coating iron, and must have a kind of anti-stickiness, so that the contents can be poured out smoothly after opening the tin, and maintain the shape of lunch meat. There are two kinds of film-forming mechanism of the anti-sticking coatings iron used at present: one is to coat a layer of anti-sticking coatings on the common coatings iron. The other is to mix the synthetic wax with the coating evenly, then coat the tinplate. During the process of baking and film forming, the synthetic wax seeps out to form an anti-stick layer. In addition, for the special needs of products, there are some special coated iron, such as M-20 coated iron for mushrooms. Coated iron for asparagus, coated iron for meat filament (two cans), etc.

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