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News
Tinplate (SPTE) are two sides of tin-plated iron, that cold-rolled carbon steel sheet, can rust and corrosion-resistant, non-toxic, also known as tinned iron. Mainly for the production of metal packaging, including canned food, beverage, chemical, pharmaceutical, health, coatings, paints, sprays, cosmetics, caps and so on. Early in the 14th century Bohemia began production of tinplate, mainly used to make cutlery and cups.
Tinplate is coated with a layer of tin metal, it is not easy to rust, also known as tinned iron. Such coated steel in China for a long time called "tin", some people think because at that time manufactured using a tin plate cans (English name Macao read as horses mouth) imported from Macau, so called "tin." There are other claims, such as China in the past manufacture kerosene lamp in this tin plate, shaped like horses mouth, so called "tin." "Tinplate" is the name inaccurate, and therefore, when in 1973 China tin plate meeting has been name the tin plate, official documents no longer use the "tin" is the name.
Opacity
In addition to the light will lead to deterioration of food reactions can also cause changes in protein and amino acids. Vitamin C exposed to light to make it easier for tinplate role with other food ingredients, resulting in a huge loss. According to the research analysis, a transparent glass bottles of milk, vitamin C losses dark bottled milk higher than 14 times, the light also causes oxidation milk smell, as well as radionuclides, methionine cleavage loss nutritional value, tinplate cans opacity makes the highest rate of vitamin C saved.
Good seal tightness
Containers is very important for air and other volatile gas barrier property preservation of nutrients and sensory quality. Compare juice containers proof, oxygen transmission rate directly affects the preservation juice container browning and vitamin C; low oxygen permeability metal cans, glass bottles and plastic laminated aluminum foil, paper preservation of vitamin C good, among the best cans.
Reduction of tin
Tin tinplate When the inner wall is filled with the effect of oxygen remaining in the container, reducing the chance of food ingredients to be oxidized. Reduction of tin on the pale fruit juice flavor and color have a good preservation effect, and therefore do not use canned juice cans painted iron than other packaging materials juice cans filled with better nutrition preservation, brown change slightly, acceptance flavor quality is better, and thus extend the storage period.