Development and Application of Ceramic Packaging Materials

Domestic and foreign development of ceramics used in food packaging preservation, sterilization, deodorization, clarification of fruit juices, food production and wastewater treatment and other fields, the effect is significant.

Far-infrared ceramic far-infrared ceramics are ceramic materials with a wavelength range of 1 to 30μ. Silica, clay, kaolin, etc., which produce a far-infrared ceramic material, contain silicon oxide, alumina, etc. as the most basic components of far infrared ceramics. According to different needs can be added Fe2O3, TiP2, ZrO and MnO2 and other substances.

Far-infrared ceramic materials are manufactured by adding corresponding oxides such as iron, titanium, zirconium and manganese to silica and clay, crushing and adding appropriate amount of water, and sintering at a temperature higher than 1000°C to obtain ceramics capable of producing far-infrared rays. The coarse blank is crushed to form a ceramic powder, and a corresponding ceramic article or a ceramic coating or a ceramic membrane is formed as required. Infrared light can be emitted at room temperature or slightly high temperature, and it has the effects of sterilization and preservation.

A company in Japan developed a ceramic fruit and vegetable fresh-keeping bag with far-infrared effect. Packaging the fruits and vegetables with this new type of fresh-keeping bag can extend the shelf-life for more than one week. It is inside the package, coated with a layer of ceramic material, the far-infrared radiation released, and the water contained in the fruits and vegetables have a resonance effect, activate food molecules, so that it reaches the preservation effect. Far-infrared ceramic powder coated on the inside of the carton can be made into a fresh fruit and vegetable storage box for ceramics, which can be used for packaging fruits and vegetables and also has the effect of prolonging the preservation period. It can also be used to package long-distance transportation of fruits and vegetables, and to produce food containers. The far-infrared powder is added to plastics and metals to make food utensils or utensils, which has obvious effects of sterilization, preservation, and mildew-resistance.

Bio-ceramics Korea uses biotechnology (including far-infrared technology) to make bio-ceramics. It is made from a variety of natural minerals that are purified, processed, and fired with ceramic raw materials. Can be used to make bio-ceramic cutlery. Such as cups, teapots, hip flasks, casseroles, dishes, bowls, cigarette cases, etc. One of the products is a biochemical ceramic jug (a wine container) used to hold white wine. After 10 minutes, the new spicy and pungent wine can become sweet and supple, the quality of the wine is greatly improved, and the alcohol content of the wine is greatly improved. It will not be reduced, making wine a favorite high-end liquor. Pouring ordinary alcohol into a bioceramic jug for 24 hours can make the mouthfeel equivalent to 30 years old wine in the cellar. The components in the bioceramics can harmonize and alcoholize alcoholic and other ingredients, remove harmful impurities, reduce alcohol, and have side effects on people.

Deodorizing Ceramics Japan has successfully developed a new ceramic that can exert excellent deodorizing effects at low temperatures. The appearance is a rectangle with a thickness of 1 cm or less, with 200 to 250 meshes, honeycomb, water resistance, freezing resistance, and firmness. High advantage, suitable for use in refrigerators, air conditioners, without energy, can be used continuously for more than 10 years.

The new ceramic is made of manganese oxide as a raw material and is blended with five kinds of oxides. It can cause odor components such as methyl mercaptan, which causes decay of vegetables and fruits, to be adsorbed on the surface of activated ceramics and oxidized and decomposed into carbon dioxide and water. Deodorizing effect.

Ceramic membrane Ceramic membrane developed by Tokyo A&M University in Tokyo to treat molasses to increase ethanol yield is a ceramic MF membrane with a pore size of 0.05 μm. It can be used to pretreat molasses, which is used as raw material for alcohol production, to remove inorganic salts, non-fermentable sugars, and ash containing coloring substances in molasses, which have an obvious effect, and can greatly increase the yield of fermented alcohol. More than 18% increase in fermentation and 30% in semi-continuous fermentation. The residual sugar after fermentation was 42% lower than that without pretreatment of molasses, and the pollutants in the waste liquid were greatly reduced, which greatly reduced the pollution of waste water and the treatment cost of waste water pollution.

Porous ceramics Japan uses porous ceramics as bioreactors to treat high concentrations of food waste. The bacteria are fixed on the porous ceramic inside the ceramic reactor. For example, the waste liquid of the soybean juice passes through the ceramic reactor in which the bacteria are fixed, and the BOD (biological oxygen demand) in the waste liquid can be removed by more than 90%, and the waste can be recovered and digested. Gas as energy, the effect is better than other methods to deal with bean juice wastewater. This device is also suitable for the treatment of other high-concentration food wastewaters.

Fine Ceramics Many national research institutes and national universities in Japan develop fine ceramics, which have high strength, high corrosion resistance, high wear resistance and other excellent properties at high temperatures, tensile strength equal to that of iron, high reliability, and ability to withstand temperatures above 1250°C. The extremely high temperature.

The ceramic is suitable for cutting-edge products used in airplanes and high-efficiency thermal energy facilities and is not a range of food packaging materials.

Anti-rust packaging applications in the metallurgical field I. Application of rust-proof packaging materials in the metallurgical industry:

a) Short-term anti-rust between cold-rolled plates produced between programs and relay library:

Before the annealing plate enters the leveling process after annealing, and before the substrate after rolling annealing enters the next plating production, it needs to be placed in the order and in the transfer stock for a certain period of time. In general, the time from the annealing into the leveling process is generally not more than 15 days, and the coil storage time before coating is generally not more than 30 days. However, due to the direct exposure of steel coils to industrial ventilation plants, the bare steel coils are prone to corrosion due to the high temperature and humidity conditions in the southern coastal areas, river areas and the rainy season and the influence of air pollution and dust in the factory buildings.

The rust-proofing between the pre-smoothing stages can be done by our company's flexible vapour-proof rust-proof cover for steel coils. This product has properties of short induction period, good strength, softness and collapsibility. Can be reused within a certain period of time. In addition to rust prevention, it also plays a role in dust prevention.

Because the coils are stored for a relatively long time before coating, and the coils need to be transported and stored at a certain distance, the rust prevention of the transfer warehouse is mainly based on the use of rust-proof papers for different boards. In addition to rust prevention, it also serves the purpose of preventing physical damage and easy lifting.
b) Packing and packaging of cold rolled sheet products:

Purpose - To prevent cold rolled products from rusting and to meet the needs of product storage and transportation, cold rolled products must be protected and packaged.

Packaging classification - divided into roll packaging and box packaging. At the same time, each type of packaging is divided into three types: simple package, universal package, and fine package according to the difference of cold rolled plate product plate, transportation distance and destination environmental conditions.

The role of anti-rust paper - play a rust-proof effect on the steel plate packaging space; provide the sealing function of the steel plate sealed packaging waterproof and moisture; realize the physical properties of steel plate packaging materials.

Requirements for rust-proof papers - Dual anti-rust properties in gas phase and contact; Composite structure with three or more layers, with excellent waterproof and moisture resistance; Fabric reinforced structure, physical strength to meet heavy plate packaging requirements.
Cold-rolled coil packaging process (for example, manual package):

Use cautions:

A. The new selection of rust-proof materials should be tested for compatibility with rust-proof paper and rust-proof oil, and it can be used only after being qualified.
B. Select different anti-rust paper varieties for different plates;
C. The lap joints of peripheral rust-proof paper and inner core rust-proof board paper are all sealed with adhesive tape;
D. If rust-proof paper is damaged locally, it should be replaced with rust-proof paper or partial subsidies;
E. Packing coil temperature should not exceed 65 °C

Use cautions:

A. Anti-rust material should be used to test the compatibility of anti-rust paper and rust-proof oil.
B. Select different anti-rust paper varieties for different plates;
C. The lap joints of peripheral rust-proof paper and inner core rust-proof board paper are all sealed with adhesive tape;
D. If rust-proof paper is damaged locally, it should be replaced with rust-proof paper or partial subsidies;
E. Packing coil temperature should not exceed 65 °C

c) Application of new anti-rust packaging materials in cold-rolled plate coating

Second, the application of metal degreaser in the metallurgical industry:

Degreasing and degreasing of metals is an important process and plays an important role in the subsequent processes (electroplating, hot-dip coating, coating, conversion film, etc.) and it is a key part of the pretreatment process. According to statistics, due to incomplete degreasing and degreasing, the proportion of defects in the coating and conversion film layer generally accounts for 60-80%. Therefore, we must pay great attention to pre-treatment, especially degreasing and degreasing.

Prior to continuous annealing of cold-rolled sheet, electro-galvanizing, hot dip galvanizing, tin plating, color coating, and pretreatment of silicon steel all require degreasing cleaning. The cleaning methods mostly use chemical dipping, brushing, electrolytic degreasing and cleaning. Degreasing agents are available in solid and liquid forms.

Reprinted from: China Mining Machinery Network