industry

  Velcorin , also known as dimethyl dicarbonate, is a preservative approved by the Ministry of Health and complies with the Food Sanitation Law of the People's Republic of China and the Food Additive Sanitation Management Measures. The molecular formula is C4H6O5, and the relative molecular mass is 134.09. The boiling point is 172 ° C, at room temperature, it is a slightly astringent colorless liquid, usually used in beverage cans. DMDC has a broad-spectrum antibacterial effect. Its main target microorganisms are yeasts (including Saccharomyces cerevisiae, Zygosaccharomyces ruckerii, Rhodotorula, Candida, Pichia, Toluobacillus, Torula, Endosporium, Klerkia, Hansenula, etc.). It also has a disinfecting effect on many other bacteria (such as Acetobacter pasteurianus, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, various lactobacilli, Pediococcus beer). DMDC has also been shown to kill E. coli 0157:H7. The antibacterial effect of DMDC is the result of inactivating e...

  Hot-dip galvanization  has been extensively used to prevent corrosion for 100 years. Hot-dip galvanized steel has a great lifespan. This effective form of galvanization provides 2 levels of protection : – Barrier protection – Cathodic protection   In Cathodic protection, Zinc protects the underlying material. If any part is scratched, Zinc will prolong its protection. Zinc can also function as a barrier slowing down the corrosion rate.   What is Hot Dip Galvanizing? Hot dip galvanizing is a process developed to prevent steel from corroding. Before the process can take place, the steel goes through a thorough chemical clean which removes all rust, oil and mill scale from the surface. When the cleaning solution has been rinsed off, the coating process can begin. The steel is dipped into a bath of molten zinc heated to around 450°C (860°F) before being left to cool in a quench tank. When the cooling process is complete, the zinc coating is then metallurgically bonded ...

  Polyvinyl Chloride or PVC is just one of the most popular commercial thermoplastics chosen to create a selection of plastic products. These consist of pipelines, clinical tubes, and containers, electric wires, as well as building plastic exterior siding. As this material is in great need, makers require to follow a systematic process when creating as well as creating PVC items.   The personalized plastic  injection molding  process is one that calls for an understanding of PVC as a material, state-of-the-art equipment, and also aspects like temperature level, and also speed. These factors are gone over in detail listed below:   Secure Capacity For PVC shot molding the manufacturer will require a shot molding machine, which has a securing pressure of 1.5 to 2.5 loads per square inch. PVC Conditions: The temperature of the melted PVC should be checked by straight placing a needle pyrometer into the product. One of the most maximum thaw temperature levels for PVC...

Proportional valves in hydraulic systems are classified according to their main functions, and are divided into four categories: pressure control valves, flow control valves, directional control valves, and proportional composite control valves. Each type can be divided into two structural forms: direct control and pilot control. Direct control is used in small-flow and low-power systems, and pilot control is used in large-flow and high-power hydraulic systems to form an electro-hydraulic  proportional valve . ①  Proportional pressure valve: There are proportional relief valve, proportional pressure reducing valve, proportional sequence valve, which can continuously adjust the pressure. ②  Proportional directional valve: The input current determines the flow direction of the liquid flow, and the stroke of the spool is proportional to the input current. The directional valve is divided into two categories: with position sensor and without position sensor. ③  Proportio...

  As with most types of foam such as expanded polypropylene foam (EPP foam), expanded polyethylene (EPE foam), is manufactured by the application of high pressure, heat, as well as a blowing agent in a pressurized chamber called an autoclave. The molten foaming polyethylene material is then made into small plastic beads in a  EPE Foam Sheet Extrusion Machine  that uses water to cool and form the beads.  The resultant plastic beads are used as feed material and injected into specialized moulds under high heat and pressure to force the beads to melt and take the shape of the mould. The manufacturing process of EPE foam is pretty straightforward, and mostly involves the use of high temperatures and pressures in a sealed and pressurized container.  The leftover EPE material that is in the form of beads or defective pieces, or even material that has seeped through the material, can be collected and fed back into the machine to produce whole new pieces. This is how to...

Nitrifying bacteria   convert ammonia, the most reduced form of nitrogen in the soil, into nitrate, its most oxidized form. By itself, this is important for soil ecosystem function, controlling soil nitrogen loss through nitrate leaching and denitrification. Nitrifying agents also contribute to other important processes, including nitrous oxide production, methane oxidation, degradation of organic compounds, and carbon monoxide oxidation.   Nitrifying bacteria are traditionally considered to be exclusively aerobic; they require molecular oxygen for the reactions and respiration in the N oxidation pathway. However, they are considered to be microaerobic and they grow best under relatively low oxygen conditions. Microaerobiosis may be important in interfacial environments, such as the sediment-water interface and the oxygen minimum zone of the ocean.   While net nitrification and growth at the expense of inorganic N occurs only under aerobic conditions in autotrophic nitrif...

  Free water bottles are a thing now. It seems like someone at every conference, fitness class, or speaker series is handing you a bottle the second you walk in. Sure, it’s a nice perk, and you get something to drink while you’re dozing off in your chair. But have you ever considered what on Earth (literally) happens to these bottles once you’re done guzzling that water?   Chances are, those free water bottles are made of polyethylene terephthalate (PET), a type of polyester fabric. While PET isn’t great for the environment--it’s costly to produce, made from crude oil, and uses up a lot of energy to manufacture--it does have one great quality: it’s highly recyclable. rPET is the recycled version of your average water bottle, and, like a new iOS, it’s incredibly better than its PET predecessor in a multitude of ways.   Way more eco-friendly, rPET is like a second chance for synthetic materials. A second chance toward reducing landfills, lowering PET’s carbon footprint, and...