Tinplate Steel Coil (SPTE)

Product Introduction of Tinplate (SPTE)
Tinplate originated in Bohemia (Present-day Czech Republic and Slovakia). The region has been rich in metal technology since ancient times, and knows how to use water to engage in machine manufacturing, from the 14th century began to produce tinplate. For a long time, it has been the world's main producer of tinplate. At that time, Makou iron was mainly used to make tableware and drinking utensils. After the First World War, the armies of various countries made a large number of iron containers (cans) and extended to the present.

At that time, some people believed that the tin plate used in the manufacture of cans was imported from Macao, Guangdong Province (English name Macao can be read as Ma Kou), so it was called "Tinplate". There are also other sayings, such as China used this Tin-plated sheet to make the lamp head of the kerosene lamp, shaped like a horse's mouth, so it is called "Tinplate". The name "Tinplate" is not exact, so in 1973, the Chinese tinplate meeting has been renamed as tinplate, and the official document no longer uses the name "Tinplate".

What is Tinplate?
Tinplate is a surface coated with a layer of Tin, it is not easy to rust, also known as tinplating iron. It is made by dipping a sheet of iron into molten liquid Tin. Tin is a less active metal than iron, which is neither oxidized by air nor reacts with water, so it has quite strong corrosion resistance. A thin layer of Tin on the iron sheet can provide good protection. However, once the coating is destroyed after electrochemical corrosion, due to the active iron than Tin, iron will be used as the negative electrode of the original battery oxidation reaction and loss, the presence of Tin will accelerate the corrosion rate of iron, so Tinplate can only have the role of protecting iron in the case of intact coating.

Tinplate can in line with environmental protection requirements of packaging materials:
Existing containers include iron cans, aluminum cans, paper and plastic containers, the recycling characteristics of these containers are different, but the recycling of iron cans is better than other packaging materials containers. Based on the international environmental management standard ISO-14000 implementation is imminent, with low pollution, recyclable, resource-saving characteristics of tinplate cans, in the future packaging use, will have a broader space for development:
1. Low pollution:
Tinplate, the main raw material in the tin can container, is in fact environmentally harmless and can be naturally decomposed, because when the tin can exists in the environment, it can be naturally oxidized and returned to the original iron oxide state and returned to nature, so the pile of waste tin can be decomposed by time and will not remain to cause environmental pollution. At the same time, the manufacture of iron cans does not have to cut down trees, which will not destroy the ecological balance.

2. Recyclable:
The tin itself has a characteristic that other packaging materials do not have - it can be adsorbed by magnets, so the tin can can be separated from the waste by magnetic separator, and the effect of recycling 80% of the garbage can can be easily achieved by using this characteristic. The invention of environmental protection cover not only makes the use of iron cans more safe and sanitary, but also effectively reduces the amount of garbage, and has direct and obvious benefits for recycling operations.

3. Provincial Resources:
In the removal of other pollution residues on the tin, the shredder equipment has been developed, which can effectively remove more than 98% of the pollutants and provide good quality waste iron filings. In addition, the United States also pointed out that the existence of aluminum easy to open the lid is conducive to the recycling of scrap iron, because it can reduce the amount of Hot Metal in steelmaking, reducing the overall cost of steel manufacturing. In addition, in terms of energy savings, the report pointed out that the use of tinplate scrap production of steel compared with iron ore production, each ton of scrap iron can save about 230m3 of natural gas consumption, so the recycling process of iron cans can reduce the impact on the global environment and energy, in line with future product trends.

Advantages of tinplate packaging materials:

Tin-plated sheet steel, referred to as tinplate, also known as tinplate, is a low carbon sheet steel plated with tin on both sides, due to its various advantages are excellent packaging materials for food, chemical industry and so on.

1. Opacity:
In addition to triggering deterioration reactions in foods, light also causes changes in proteins and amino acids. The exposure of vitamin C to light makes it easier to interact with other food ingredients, resulting in a large loss. According to research and analysis, the loss of vitamin C in transparent glass bottles of milk is 14 times higher than that in dark bottles of milk, light will also cause milk to produce oxidative smell, as well as nuclide, methylthiamine and other cracking and loss of nutritional value, tinplate can opaque light makes the preservation rate of vitamin C the highest.

2. Good sealing:
The barrier of packaging containers to air and other volatile gases is very important for the preservation of nutrients and sensory quality. The comparison of various juice packaging containers showed that the oxygen permeability of the container directly affected the Browning and vitamin C preservation of the juice. The preservation of vitamin C is better in metal cans, glass bottles, aluminum foil glue layers and cartons with low oxygen transmission rate, of which iron cans are the best.

3. Reduction of tin:
The tin in the inner wall of the tin plate will interact with the oxygen remaining in the container during filling, reducing the chance of the food ingredients being oxidized. The reducing effect of tin has a good preservation effect on the flavor and color of light colored fruits and juices, so the juice cans filled with unpainted iron cans have better nutritional preservation than those filled with other packaging materials, and the Browning change is slight, the acceptance of flavor quality is better, and the storage period is extended.

Because of these properties, the tin can provides a closed system in addition to heat, completely isolated from environmental factors, to avoid color food due to light, oxygen, moisture and deterioration, not due to aroma through the light or by environmental odor through pollution and taste, food storage stability is better than other packaging materials, vitamin C retention rate is the highest, the preservation of nutrients is also the best.

Application:

The application of tinplate is very wide, from as food and beverage packaging materials to grease cans, chemical cans and other miscellaneous cans, the advantages and characteristics of tinplate provide content in the physical and chemical properties of good protection.

1. Canned food
Tinplate can ensure food hygiene, minimize the possibility of corruption, effectively prevent health risks, and also meet the needs of modern people in the diet of convenience and speed.

2. Beverage cans
Tinplate cans can be used to fill juice, coffee, tea and sports drinks, can also be filled with cola, soda, beer and other drinks. The high workability of the tinplate can make its tank type change more, whether high, short, large, small, or square, or round, can meet the diversified needs of today's beverage packaging and consumer preferences.

3. Grease cans
Light will trigger and accelerate the oxidation of oil, reduce nutritional value, may also produce harmful substances, more serious is the destruction of oil vitamins, especially vitamin D and vitamin A. The oxygen in the air promotes the oxidation of food oil, reduces the biomass of protein, destroys vitamins, and the tinplate is opaque and the insulation effect of sealed air, which is the best choice for packaging fat food.

4. Chemical tank
Tinplate material is strong, good protection, no deformation, shock resistance, fire resistance, is the best packaging material for chemicals.

5. Spray and other miscellaneous cans
Can withstand high temperature and high pressure tinplate cans, especially suitable for high pressure filling spray cans. The changeable shape of the cans and the exquisite printing of tea, cracker barrels, pencil cases and milk powder cans are tinplate products.