Applications For Vacuum Mixers
Vacuum mixers are designed to mix compounds under vacuum conditions, limiting excess air and preventing bubble formation. This allows for degassing and enhanced drying at lower temperatures.
The Whip Mix Vac-U-Mixer allows for thorough spatulating of stones, plasters, die materials and investments as well as alginates under vacuum to produce smooth, dense, detailed casts or impressions. Each model is user programmable with up to 20 different mixing times.
Preparation of cements and amalgams
The preparation of cements is an important application for vacuum mixers. This is because a vacuum mixer can help to remove the water and solvent vapor that is generated during mixing. This helps to produce a stronger and more durable product. The vacuum mixer also helps to reduce the amount of contamination from air vapors.
Cement-impregnating mixtures are usually made of a combination of powders and liquids. Depending on the composition of the mixture, there are different methods for their preparation. The most common method involves using a syringe. Using a vacuum pump to mix these materials will prevent the formation of bubbles and will ensure that all the ingredients are evenly mixed. A vacuum mixer can also be used for the preparation of dental impression materials. It can be used for mixing and degassing of alginates, a type of impression material.
Several glass-ionomer cements are available on the market. These are based on glasses that vacuum mixer are basic and release small amounts of sodium, aluminium, phosphate and silicate under neutral conditions. These compounds also have an advantage over calcium-based materials in that they can be radiopaque. However, their success is limited by the need for a fast and precise setting reaction.
The ionomer cements can be set by the action of an acid-base reaction that begins with a reaction of hydrated protons from the polyacid at basic sites on the surface of the glass particles. This rapidly produces ionic crosslinks, while at the same time producing an insolubilised polysalt that is responsible for the rapid initial setting of the cement. Various additives have been studied as rate-modifying agents for these cements. (+)-Tartrate and citric acid have proven effective.
Preparation of ointments and gels
The use of a vacuum mixer in the preparation of ointments and gels can help prevent the integration of air into the product. This equipment is also capable of degassing the material. The degassing process can be made more efficient by using a pump or a vacuum system. This is particularly important for thicker materials such as pastes and gels.
Vacuum emulsifying machines are used by a variety of industries, including cosmetic, pharmaceutical, and food. They are often equipped with a variety of features to meet the specific needs of each industry. These include spherical particles, different particle sizes, and differing textures. This helps the ingredients to mix and emulsify well. The equipment is also designed to comply with CGMP and sterilize-in-place (SIP) requirements. It is also easy to operate and maintain, with digital time and temperature displays.
The machine combines the functions of a mixer, agitator, and homogenizer. It is a high-quality, multifunctional device that can be used in a variety of applications. It can be used to prepare ointments and creams, as well as for the production of liquids and dry powders. It also has the ability to heat and cool the ingredients. The machine can be easily cleaned and sanitized thanks to its stainless steel 316Ll contact parts. It can also be equipped with CIP, which will automatically trigger the cleaning of the machine on a regular basis.
Preparation of liquids
Many liquids, especially solvent-based formulations, require a vacuum environment during mixing. This minimizes oxygen entry to the mixture, which reduces decomposition of air-sensitive ingredients, thwarts unwanted chemical reactions and microbial growth, and increases product stability and quality. In addition, a vacuum environment reduces foam formation and allows for faster mixing, which can shorten processing time and save energy.
Mixing under reduced atmospheric pressure in a vacuum mixer also supports the inerting process of solid active pharmaceutical ingredients to convert them into more user-friendly dosage forms such as chewable tablets, effervescent tablets, oral tablets, capsules or suppositories. Atmospheric oxygen can negatively affect the shelf life of solid drugs. This inerting process is often achieved through agglomeration processes in fluid bed apparatuses or by using powder mixers, but the vacuum mixer offers a more efficient method because it allows for the agglomeration and dispersing of the solid drug material to take place directly in the vacuumed vessel.
Another common use of a vacuum mixer is for matrix blending of solid surface materials to produce void-free, durable products that are popular in today’s kitchen and bath markets. A vacuum mixer can be used to agitate and mix the raw material, then evacuate the system to remove all air from the mixture, which allows the product to dry more quickly and at a lower temperature than conventional methods.
Preparation of powders
Vacuum mixers offer a reliable way to mix anything that can be mixed under a vacuum. This includes Silicone, epoxy, PDMS, other polymers, ingredients or dough. By mixing under a vacuum, you avoid air incorporation into your product and reduce the likelihood of foaming. The vacuum created by the mixer can also shorten your production time.
Introducing powdered materials into a liquid is one of the most challenging processing challenges for many manufacturers. mixer manufacturer When done wrong, the result is dusting and floating powders that create abrasions in batch systems. Even with agitation, these problems are difficult to eliminate, especially in full-scale production.
In the case of hydrophobic powders such as fumed silica, CMC, guar gum, talc, carbomers and other rheology modifiers, adding them to an agitated batch is often time-consuming. The shear required to disperse these powders into the liquid phase is intense and can cause premature degradation of the rheological properties of your formulation.
Using a Ross powder injection mixing system, you can dramatically decrease your processing time while avoiding the common issues associated with traditional methods of incorporating these hard-to-wet ingredients. The innovative technology introduces the powders right into the high shear zone, promoting instant wet-out. This dramatically reduces the time needed to prepare products for production – and significantly decreases your raw material costs in the process.