• What is the role of aluminum foil stack rolling (double rolling)?

    Aluminum foil rolling produces plastic deformation under the conditions of roll-free rolling. At this time, the rolling mill frame is elastically deformed and the rolls are elastically flattened. When the thickness of the rolled piece reaches a smaller and more limited thickness h. When the rolling pressure has no effect, it is very difficult to make the rolled piece thinner. Usually two pieces of aluminum foil are stacked and rolled. For thin aluminum boxes with a thickness of less than 0.012mm (the thickness is related to the diameter of the work roll), due to the elastic flattening of the rolls, it is very difficult to use ...

  • How to control the thickness difference of aluminum foil?

    It is a characteristic of aluminum box rolling that the thickness deviation is difficult to control. The thickness difference of 3% is not difficult to control in the production of plate and strip, but it is more difficult to control in the production of aluminum foil. As the thickness of the aluminum box becomes thinner, its micro-conditions can affect it, such as temperature, oil film, and oil and gas concentration. A roll of aluminum foil can be rolled up to hundreds of thousands of meters, and the rolling time is as long as about 10 hours, and the error of thickness measurement is easy to form with time. The only way to a ...

  • What is the cause of oil spots on aluminum foil?

    The rolling oil and other oil stains remaining on the surface of the foil, which are formed on the foil surface to varying degrees after annealing, are called oil spots. The main reasons for oil spots: high degree of oil in aluminum foil rolling, or inappropriate distillation range of rolling oil; mechanical oil infiltration in aluminum foil rolling oil; improper annealing process; excessive oil on the surface of the product during rolling; The slitting tension is too large, causing the aluminum foil roll to be too tight.

  • Ways to prevent aluminum foil from degreasing

    Degreasing pollution is mainly manifested on the surface of the aluminum foil in 0 state. After the aluminum foil is annealed, it is tested by the water brushing method, and it does not reach the level specified in the water brushing test. The aluminum foil that requires the water-washing test is mainly used for printing, composite with other materials, etc. Therefore, the surface of the aluminum foil must be degreasing clean and reach the level specified by the water-washing test. The main reasons for unclean degreasing: excessive oil on the surface of the aluminum box; excessive slitting tension; unreasonable annealing proc ...

  • Aluminum foil rolling process and characteristics

    In the production of double foil, the rolling of aluminum foil is divided into three processes: rough rolling, intermediate rolling, and finishing rolling. From a technological point of view, it can be roughly divided from the thickness of the rolling exit. The general method is that the exit thickness is greater than Or equal to 0.05mm is rough rolling, the exit thickness is between 0.013 and 0.05 is intermediate rolling, and the single finished product and double rolled product with the exit thickness less than 0.013mm are finished rolling. The characteristics of rough rolling are similar to the rolling characteristics of a ...

  • When grilling food with aluminum foil, should the shiny side face up or the matte side up?

    Since aluminum foil has shiny and matte sides, most of the resources found on search engines say this: When cooking food wrapped or covered with aluminum foil, the shiny side should face down, facing the food, and the dumb side Glossy side up. This is because the glossy surface is more reflective, so it reflects more radiant heat than matte, making the food easier to cook. Is it really? Let's analyze the heat conduction method: There are three basic ways to transfer heat: conduction, convection and radiation. Conduction is when heat is transferred through contact between one object and another hot object. This is what happens ...

  • How is aluminum foil produced?

    Cast-rolled aluminum foil production process Aluminum liquid, aluminum ingot -> Smelt -> Continuous roll casting -> Winding -> Cast roll finished product Plain foil production process Plain foil -> Cast-rolled coil -> Cold rolled -> Foil rolling -> Slitting -> Annealing -> Plain foil finished product The manufacture of aluminum foil is similar to making pasta at home. A large block of almost pure aluminum is rolled several times through giant steel rolls, thereby reducing the thickness of the aluminum block and spreading it out to make it longer. Lubricants are added during the rolling process to ...

  • Is tin foil the same as aluminum foil?

    Now the aluminum foil we see in the market is no longer made of tin, because it is more expensive and less durable than aluminum. The original tin foil (also known as tin foil) is really made of tin. Tin foil is softer than aluminum foil. It will smell tinted to wrap food. At the same time, tin foil cannot be heated due to its low melting point, or the heating temperature is high-such as 160 It begins to become brittle above ℃-which limits its use in food packaging. If you need to grill food, you cannot use tin foil when baking food. Since the aluminum foil paper has a higher melting point, it starts to melt when heated to ab ...

  • Contribute a bit of Heat and Light, However Small they are, just Like a Firefly -David Jin, General Manager of Henan Huawei Aluminum Co., Ltd., Actively Promotes First Aid CPR and AED

    The shocking statistics released by the National Center for Cardiovascular Diseases suggest that China has the highest occurrence of sudden cardiac deaths (SCD) in the world, accounting for over 544,000 deaths annually. That is to say, SCDs occur at a rate of 1,500 people/day or one person/minute in China. According to David Jin, general manager of Henan Huawei Aluminum Co., Ltd. (“Huawei Aluminum”), in view of the high occurrence of SCDs in people of all ages in recent years, it is urgent to popularize first aid CPR and increase the installation of AED in public places. SCD has become a major cause of mortality, with symptom ...

  • Analysis on the Causes of Drums in High-speed Aluminum Foil Rolling

    It is generally believed that the single-sheet rolling speed of the aluminum foil should reach 80% of the rolling design speed of the rolling mill. Danyang Aluminum Company introduced a 1500 mm four-high irreversible aluminum foil roughing mill from Germany ACIIENACH. The design speed is 2 000 m/min. At present, the single-sheet aluminum foil rolling speed is basically at the level of 600m/miT, and the domestic single-sheet rolling speed is generally 60% to 70% of the setting speed. Aluminum foil often encounters problems such as wrinkling, layering, drumming, and poor plate shape during high-speed rolling. Any defect may cau ...

  • How to distinguish between good and bad aluminum foil? Comprehensively sort out the quality defects of aluminum foil

    In the production process of aluminum foil, there are multiple processes such as rolling, finishing, annealing, packaging, etc. The interlocking production process, any problem in any link may cause aluminum foil quality problems. The quality defects of the purchased aluminum foil products will not only affect the appearance, but also directly affect the quality of the products produced, and even more directly cause the aluminum foil to break and stop, which greatly affects the production efficiency. How to distinguish the quality of aluminum foil? According to the experience of people in the aluminum industry, most of the qu ...

  • Are aluminum foil lunch boxes poisonous?

    Aluminum foil lunch box is a new type of non-toxic and environmentally friendly tableware. 1. The main ingredient in the aluminum foil lunch box is aluminum, so it will react with acid like aluminum cans, and the salt produced by aluminum and organic acids will react with gastric acid to produce aluminum chloride, so we need to use it. Note that, generally speaking, it is often used for steaming rice. There is no other fuel. It is harmless to the human body and can be used with confidence. However, if there is still unqualified tin foil in life, it may have adverse effects on the human body. For our health, we must choose qua ...

  • What are the advantages and disadvantages of aluminum foil lunch boxes?

    1. Insulation and fragrance preservation Aluminum foil lunch boxes are usually used as paper-wrapped beverage packaging. The thickness of the aluminum foil in the packaging bag is only 6.5 microns. This thin aluminum layer can be waterproof, preserve umami, anti-bacterial and anti-fouling. The characteristics of preservation of fragrance and freshness make the aluminum foil lunch box possess the properties of food packaging, and the characteristics of high temperature resistance and oil resistance make it easy to control all kinds of hot meals, even in the face of the old difficulty of takeaway packaging-oil and soup There ar ...

  • Semi-rigid container foil and surface oiling treatment

    Pre-coated aluminum foil used for punching various containers, commonly used alloy 8011, 3003, 3004, 1145, etc., thickness is 0.02-0.08mm. Oiling thickness is 150-400mg/m². The use of aluminum foil as a semi-rigid container to hold food has been widely adopted at home and abroad. With the continuous development of the national economy and the continuous improvement of people’s living standards, people’s health awareness has been continuously strengthened, and people’s awareness of environmental protection has increased. Rigid container aluminum foil gradually replaced traditional foam and plastic food boxes. Semi-rigid contai ...

  • Six Factors Restricting the Heat Sealing Strength of Pharmaceutical Aluminum Foil Packaging Products

    For aluminum foil pharmaceutical packaging, the quality of the product is largely reflected in the heat seal strength of the product. Therefore, several factors that affect the heat-sealing strength of aluminum foil bags for medicines have become the key to improving the quality of product packaging. 1. Raw and auxiliary materials The original aluminum foil is the carrier of the adhesive layer, and its quality has a great influence on the heat seal strength of the product. On the one hand, oil stains on the surface of the original aluminum foil will weaken the adhesion between the adhesive and the original aluminum foil. If t ...

  • How much do you know about the characteristics of aluminum foil?

    Aluminum foil has a clean, hygienic and shiny appearance. It can be integrated with many other packaging materials into an integrated packaging material, and the surface printing effect of aluminum foil is better than other materials. In addition, aluminum foil has the following characteristics: (1) The surface of the aluminum foil is extremely clean and hygienic, and no bacteria or microorganisms can grow on its surface. (2) Aluminum foil is a non-toxic packaging material, which can be in direct contact with food without any hazard to human health. (3) Aluminum foil is a tasteless and odorless packaging material, which will ...

  • What is the difference between aluminum foil lunch boxes and traditional disposable lunch boxes?

    Aluminum foil lunch boxes made of aluminum foil can be processed into various shapes and are widely used in food packaging such as pastry baking, airline catering, takeaway, cooked food, instant noodles, instant lunch and other food fields. The aluminum foil lunch box has a clean appearance and good thermal conductivity. It can be heated directly on the original packaging with ovens, microwave ovens, steamers and other kitchen utensils. It is convenient to use, safe, hygienic, free of odor and leakage. Aluminum resources can be recycled and reused, which avoids resource waste and protects the environment. Aluminum foil lunch ...

  • 9 interesting uses of household aluminum foil

    Aluminum foil paper is almost a must-have item for every family, but do you know that besides cooking, does aluminum foil paper have any other functions? Now we have sorted out 9 usages of aluminum foil paper, which can clean, prevent aphids, save electricity, and prevent static electricity. From today, don’t throw away after cooking with aluminum foil paper. Using the characteristics of aluminum foil paper will help you save money, effort and time. 1. Reduce the dirt and mucus in the kitchen sink Knead the aluminum foil paper into a few balls about the size of a coin and put them in the basket of the kitchen sink drain to re ...

  • What are the advantages of aluminum foil lunch boxes and containers?

    1. The raw materials are non-toxic and the quality is safe Aluminum foil is made of primary aluminum alloy after rolling through multiple processes, and it has no harmful substances such as heavy metals. In the aluminum foil production process, a high-temperature annealing and disinfection process is used. Therefore, the aluminum foil can be safely in contact with food and will not contain or help the growth of bacteria. In most cases, aluminum foil will not react with food. However, a considerable number of plastic lunch boxes on the market are produced with raw materials from unknown sources, even fake materials, and waste ...

  • Professional knowledge of tension system of aluminum foil slitting machine

    After printing and coating, aluminum foil paper and cash register paper need to be post-printed and slit on a slitting machine to cut large rolls of semi-finished products into the required specifications. The semi-finished products that run on the slitting machine are an unwinding and rewinding. This process includes two parts: machine speed control and tension control. The so-called tension is to pull the aluminum foil and roll it to the core according to the standard. A certain stretch and tension traction must be applied to the aluminum foil. The tension control force of the tensioning aluminum foil is the tension. Tensio ...

  • Part of the cause of aluminum foil splitting and cutting edges, polygons, and powder falling

    The post-processing of aluminum foil is an important part of an enterprise, which is related to the yield of an aluminum enterprise and the profit point of the enterprise. The higher the yield, the higher the profit point of the enterprise. Of course, the yield rate must be controlled in every link, standardized operation, and sophisticated equipment and responsible leaders and employees are required. I don't understand the equipment and operating specifications, and I dare not point fingers at them. I can only analyze it according to practice on the slitting knife. Next, I will talk about why the slitting will produce edge, ...

  • Several Factors Affecting the Heat Sealing Strength of Aluminum Foil Medicine Packaging

    The main factors affecting the heat sealing strength of aluminum foil medicine packaging are as follows: 1. Raw and auxiliary materials The original aluminum foil is the carrier of the adhesive layer, and its quality has a great influence on the heat seal strength of the product. In particular, oil stains on the surface of the original aluminum foil will weaken the adhesion between the adhesive and the original aluminum foil. If the surface of the original aluminum foil is oily and the surface tension is lower than 31×10-3μm, it is difficult to achieve the ideal heat seal strength, so the quality of the original aluminum foil ...

  • Discuss the influencing factors of the barrier performance of aluminum foil composite soft packaging materials

    As a metal material, aluminum foil is non-toxic, tasteless, has excellent electrical conductivity and light-shielding properties, extremely high moisture resistance, gas barrier properties, and its barrier performance is incomparable and irreplaceable by any other polymer materials and vapor-deposited films. of. Perhaps it is precisely because aluminum foil is a metal material completely different from plastic, its performance and characteristics are not recognized by many people, and even many misunderstandings have occurred. For example, there is a view that the barrier performance of aluminum foil and plastic composite is ...

  • Why should the mask bag be made of aluminum foil?

    Nowadays, many female companions attach great importance to beauty and skin care. Women who are busy with their lives and work often use facial masks for skin care, which can provide sufficient nutrients for the facial skin and make the skin healthier and more energetic. With the increasing demand for facial masks, many manufacturers now make and produce facial masks. In order to improve the storage time of facial masks and facilitate the transportation and sales of goods, these manufacturers pay particular attention to the choice of facial mask packaging materials. So which material is better for the vacuum bag mask packagin ...