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SQY-1000 Sugar Coating Pan

SQY-1000 Sugar Coating Pan

Coating pan machine General Description:

  • It is widely used in the pharmaceutical, nutritional and food industries for coating tablets or pills.
  • A built-in heater is provided with the machine.
  • The pipe of the blower stretches into pot for an evenly heating distribution while the coating pan is rotating.
  • Adjustable coating pan and LED display.
  • Adjustable blower temperature and LED display.
  • Option adopted spray gun system for film coating processing.
  • All stainless steel 316 construction to meet the GMP standard.
  • It’s easy to operate, clean, excellent performance and simple maintenance.

SQY-1000 Sugar Coating Pan

Technical DataSQY-300SQY-400SQY-600SQY-800SQY-1000SQY-1250
Pot inclination42°42°30°30°30°30°
Motor Power0.37kw0.37Kw0.75Kw1.1Kw1.5Kw2.2Kw
Blower Power60W60W100W200W200W370W
Pot Volume1L1L5L8L10L20L
Heating Power1.4Kw1.4Kw2Kw3Kw4Kw6Kw
Rotational Speed0-46r/min0-46r/min0-40r/min0-32r/min0-32r/min0-28r/min

Sugar Coating Pan: The Ultimate FAQ Guide

If you’re looking for a high-performance sugar-coating pan, then this guide is for you.

It answers all questions you have been asking about this sugar coating machine.

So, if you want to be an expert in the sugar-coating pan, read this guide.

What is a Coating Pan?

A coating pan is a piece of equipment that will form an organic or aqueous film pellet, tablets, or small granules.

 Sugar coating pan

Sugar coating Pan

What is Sugar Coating Process?

It is a technique of covering pellets, tablets, or granules with a sugar coating.

Coated tablets

Coated tablets

What is a Sugar Coating Pan?

A sugar coating pan is a machine that will coat tablets, pellets, and granules with sugar.

Pharmaceutical industries use various coating techniques.

Some factors that influence the design of a sugar coating pan include:

  • The inclination angle of the pan
  • Rotational speed
  • The volume of the pan
  • Temperature changes during the sugar coating process

During the sugar coating process, you need to supplement the personal skill of the sugar coater.

This is done by having the correct designs and a versatile coating pan.

What are the Benefits of Sugar Coating?

There are several benefits of sugar-coating products.

Some of them include:

  • The process of sugar coating is inexpensive and uses readily available raw materials.
  • It is easy to swallow tablets that are sugar-coated as the coat will mask the taste.
  • The sugar coating process requires simple equipment.
  • Coating products may increase the sales and profit margins for the manufacturer.
  • Products from sugar coating have a nice appeal, and many consumers accept these products.
  • The process is not demanding, and the recovery process is easy to accomplish.
  • Sugar coating products will minimize tablet disintegration when you expose them to gastric fluid.
  • Incorporating other ingredients is possible while preventing chemical incompatibilities.
  • Documentation and controlling of the sugar coating process meet modern Good Manufacturing Practice [GMP] standards.
  • The coat will add extra protection to the products from chemical and physical damages.
  • Recurring costs of using a sugar coating pan is low as the main ingredients are water and sugar.
  • The acceptance rate of the raw material in sugar coating is high with only minimal regulatory issues.
  • As science and technology advances, low variability coating with manual sugar coating machines occurs.

What are the Limitations of Sugar Coating?

Sugarcoating has several advantages, and it also has some disadvantages.

Some of them include:

  • The sugarcoating process is time-consuming and tedious.
  • The final products can come in different sizes from one batch to another and also within the batches.
  • Technicians with high skills are necessary when achieving a high aesthetic appeal is vital.
  • The sugarcoating process increases the final size and weight of the products thus increasing the packaging and shipping cost.
  • Tablets that have undergone sugar coating are not responsive to embossing or using print to identify or label the product.
  • The coating pans may lack a good fume control system meaning it may discharge toxic fumes which may harm the operators.
  • Also, the pharmacodynamic properties of products may alter during the sugar coating process.
  • Installation of the machine takes time, and it requires a lot of workspaces.
  • Some of these machines are expensive to purchase in comparison to other machines.

What are the Common Sugar Coating Pan Problems and Solutions?

Here are some common issues that can occur during the sugar coating process and how to solve them:

 Sugar coating pan system

Sugar coating pan

· Cracking

Products may crack sine they may expand during or after the sugar coating process.

This happens due to stress relaxation of absorption of moisture.

Solve this problem by using a seal coat or extending the duration between sugar coating and compaction of products.

· Coating of Tablets Chipping

This may happen due to low levels and concentrations or even an absence of polymers.

Solve this issue by adding polymers to the coating solution.

Also, when you use a large number of pigments and insoluble fibers, it may cause the coating to chip.

Combat this problem by lowering the number of fillers.

· Twinning or Buildup of Multiples

This happens when there are high edge walls or flat surfaces of the products.

Correct this by altering or modifying the design of the punch that makes the products.

· Irregular Coloring

Uneven coloring will happen when there is a poor distribution of the coating solution.

In this case, add satisfactory levels of liquids and make sure it mixes properly.

There is also the issue of color migration that happens due to low drying or rapid drying.

Solve this by correcting the drying conditions and use pigments.

When you have an uneven sub coat layer, solve this by achieving the optimum smoothing during the sub coating process.

Also, wash extra color coating pigments and avoid surplus color coating liquid.

Besides, extreme drying between color applications can cause irregular coloring.

Solve this by regulating the drying conditions.

· Coating not Drying

This will happen when the available inverted sugar is in excess.

Solve this by not excessively heating the sucrose syrup while in acidic environments.

· Sweating and Blooming

The main issue happens when there is additional moisture in the final coat of the products.

Solving this entails properly drying the products to make sure the moisture levels are optimum.

· Marbling

This will cause an irregular coating on the surface of products.

Aim to achieve a smooth coating before conducting the polishing step.

What are the Applications of a Sugar Coating Pan?

Several industries use a sugar coating pan in their production process, and they include:

  • Pharmaceutical industries
  • Food industries
  • Nutritional industries
  • Confectionery industries

What are the Different Coatings that can be Applied on Tablets?

The various coatings that one can apply on tablets include:

  • Film coating
  • Sugarcoating
  • Enteric coating
  • Modified release coating
  • Specialized coating

Coating pan

Coating pan

What Raw Materials will you use with a Sugar Coating Pan?

The sugar coating process involves several steps in which you may add a variety of additives.

These additives may assist in the formulation process to achieve a specific function.

Some of these raw materials include:

· Sucrose

This is the main ingredient that you will incorporate in the coating process.

The other substitutions you can use include:

  1. Lactose
  2. Maltitol
  3. Isomalt
  4. Sorbitol
  5. Glucose
  6. Mannitol
  7. Xylitol

Other sugar mixtures you may use include:

  1. Invert sugars
  2. Starch sugars

· Fillers

The fillers will make up the structure and add weight to the coatings, and they include:

  1. Talc
  2. Kaolin
  3. Powdered acacia
  4. Calcium sulfate
  5. Corn starch
  6. Precipitated calcium carbonate

· Colorants

They function by adding color on the coating and cover irregularities that are on the core of products.

Examples include:

  1. Pigments such as inorganic color agents or titanium II oxide.
  2. Aluminum lakes
  3. Dykes

· Binders

These will enhance the durability and flexibility of coatings by creating a compaction while ascertaining consistent form.

Some examples include:

  1. Starches
  2. Agar-agar
  3. Acacia gum
  4. Gelatin
  5. Polyvinyl acetate [PVA]
  6. Carboxymethyl starch
  7. Dextrin
  8. Sodium alginate
  9. Cellulose ethers
  10. Polyvinyl pyrrolidone [PVP]

· Flavoring Agents

Flavors will enhance the acceptability of products with consumers.

Examples include:

  1. Fruit flavors
  2. Cinnamon

· Smoothing Agents

These agents will smooth out the surface of the coatings.

It accomplishes this by lubricating and binding fines that develop during the sugar coating process.

An example is the consolidation of syrup and acacia gum.

· Lubricants, Glidants, and Antiadhesives

They will minimize the friction between sugar-coated products hence preventing powder from forming during the drying stage.

Some examples of lubricants include:

  1. Colloidal silicon dioxide
  2. Talc

· Suspension Stabilizers

These stabilizers will inhibit phase sedimentation or separation of the coating solution during the sugar coating process.

They include:

  1. Thickening agents
  2. Surface-active agents such as emulsifying agents and bentonite

· Polishing Agents

It will improve the intensity and reflectivity of the color of the coatings.

Some examples include:

  1. Carnauba wax
  2. Beeswax

What is the Difference Between Sugar Coating and Film Coating?

 Film coating

Film coating

Film coating involves coating products by surrounding them with thin layers of polymeric substances.

Sugarcoating involves coating products with a solution of sucrose and water.

Film coating is not as shiny as sugar coating.

The products in sugar coating will have a higher overall weight than in film coating.

It is possible to include logos and break lines in film coating and not sugar coating.

Operators with high skills are necessary to conduct sugar coating than for film coating.

Multiple stages occur during the film coating process, whereas there is only one stage in sugar coating.

The coat is functionally and easily adaptable for controlled release during the film coating process.

Besides, sugar coating products are not functional and readily possible aside from enteric coating.

The batch coating time in film coating is lower in film coating than in sugar coating.

What are Some of the Sugar Coating Techniques?

The techniques one can use in the sugar-coating process include:

· Plain Sugar Coating

It involves applying syrup at room temperature.

The three steps in this technique include:

  1. Applying a coating formulation on products.
  2. Distributing the solution on the surface of the core.
  3. Enhancing the stability of the coating during the drying process.

· Lamination Process

It is also known as a two-component coating process.

This technique is intricate than the plain sugar-coating technique and involves two stages:

  1. Applying a solution of syrup or binders in small and excess amounts, then
  2. Powdering it to make the surplus solution stick.

· Hot Sugar Coating

This process involves applying hot syrup to the products.

Heating the syrup above room temperature will increase its viscosity.

Preventing the crystallization of sugar makes this process fragile.

This is because you need to insulate and heat all parts of the equipment.

What are the Parts of a Sugar Coating Pan?

Several parts make up a sugar coating pan to ensure it works efficiently.

These parts include:

 Parts of coating pan

Parts of sugar coating pan

 Design of coating pan

Design of coating pan

· Electric Motors

These parts provide rotational force to the sugar coating pan at various speeds.

· Touchscreen Panel

It has both the Programmable Logic Controller [PLC] and Human-Machine Interface [HMI].

Operators can key in variables and from a single station, monitor the entire sugar coating process.

· Spray System

This unit comprises the pump, nozzle, and tank.

It also assists in maintaining the cleanliness of the sugar coating pan.

· Peristaltic Pump

These pumps will assist the sprayers in stabilizing the atomization process.

They provide a force that will change the coating solution into tiny droplets that will coat the products.

· Guide Plate

The guide plates will guide the products out of the sugar coating pan after the sugar coating process.

What are the steps involved in the Sugar Coating Pan Process?

The coating process involves repetitive sucrose-based solution application in the coating pan to cover products.

There are four main processes in the sugar coating process:

Sealing or Waterproofing

It involves hardening the surface of a product by placing a moisture barrier.

Before the sugar coating process begins, seal the core and completely dry it so that it is free from moisture.

After the core is dry, apply a sealing coat to shield the core from absorbing moisture.

The coating will harden the surface of products and protect the upcoming processes.

Cores of tablets are fragile and will disintegrate during the sugar coating process.

This means the core would break when the coating begins.

Organic solvents make up water-proofing sealants and are usually water-soluble.

The porosity of tablets will influence the sealant formulation one will use.

Highly porous materials will soak up the sealant solution, thus inhibiting the formation of a uniform coat.

This means one will apply a second coat once the first one dries to ensure complete sealing of the core.

Common sealants include:

  1. Hydroxypropylmethylcellulose
  2. Polyvinyl acetate phthalate
  3. Hyroxylpropylcellulose
  4. Shellac
  5. Zinc oxide
  6. Cellulose acetate phthalate


The sugar coating process starts from a sub coating stage where the sides of tablets form the desired shapes.

It involves alternating sum or syrup solution with dusting powder such as talc or calcium carbonate.

Subcoating methods include:

  1. Coating the tablets with syrup or gum-based solution, dry them, and repeat until you achieve the desired shape.
  2. Apply dry powder, and a gum or sucrose solution, then remove the excess solution by drying to harden the surface.

Smoothing or Grossing

This step involves smoothing irregular features on the surface of the tablets.

Polishing and refinishing the tablet happens until it has the look one prefers.

Also, this process will increase the overall size of the tablet.

The operator can use a grossing syrup to eliminate large irregularities on the surface of tablets.

The grossing syrup will have solid particles that can fill spaces in the tablet better than a sugar solution.

Applying 60% to 70% of sugar solids can smooth the tablet.

The solution has a mixture of pigments, starch, gelatine, acacia, and opacifier where necessary.

In this stage, you can add color to produce a homogenous coating layer.

Color Coating

This is a vital stage as you will achieve the correct color by coating using several sugar solutions.

In the past, dye was the main color as it sticks to the surface of products during the drying stage.

Today, pharmaceuticals use approved aluminum lake pigments.

The tint the tablets through dispersion.

Lakes produce dyes but are oil dispersible, hence you can mix them with oils and fats.

It can disperse or suspend in other carriers like glycol, propylene, glycerin, and sucrose.

Polishing and Printing

This step involves making the surface of the tablet appear shiny.

Application of candelilla wax, beeswax, carnauba wax, or hard paraffin will enable the polishing to happen.

Also, edible ink can apply marking or brands on the surface of tablets.

What is the Operation Principle of a Sugar Coating Pan?

The operation begins by continuously feeding pellets or tablets in the coating pan systematically.

Large volumes of process air will heat the tablets as they enter and move in the drum.

Spray guns will apply the coating solution as the product is moving in the coating pan.

Homogeneously mix the tablets to form a uniform coating.

A shallow bed will allow the tablets and pellets to pass via the spraying zone into the discharge area.

Finally, the products will go via the conveyor belt to the collection, storage, inspection, and packaging stages.

How can you Recover Rejected Sugar-coated Tablets?

A lot of material will coat tablets and pellets.

This means it is inadvisable to crush and recompact the sugar-coated products during recovery.

A common procedure involves washing off the sugar from the tablets.

Dip the coated tablets in a water bath to remove the coatings.

After removing the coating, dry the tablets by turning them inside the coating pan using a warm stream of air [50°C].

However, this process has its difficulties due to the handling problems.

What are the Ideal Characteristics of Sugar Coated Tablets?

Coating pan parameters

 Coating pan parameters

Here are some ideal characteristics of these products:

  • It needs to conform to all basics that are in the company compendia.
  • They should be smooth, with a round contour, and even color with a shiny gloss.
  • Tablets that have imprints must have a distinct print without any smudges or broken print.

What are the Different Types of Tablet Coating Machines?

There are several types of tablet coating machines in the market.

Here are the three basic types:

· Standard Coating Pan

It is a circular metallic pan that tilts on a benchtop stand and has a diameter of 15 and 200 cm [6 to 80 inches].

An electric motor can rotate the pan.

Once you load a batch of tablets in the pan, set it to rotate, and the tablets will tumble within the pan.

Spray guns will apply the coating solution in an atomized form.

These tiny droplets will form a rapid and even distribution that introduction of the coating solution as a liquid.

It achieves drying efficacy by:

  1. Distributing a drying air via a hollow metal sword within the bed.
  2. Using pans and diffusers that will allow dry to move uniformly on the surface of tablets.
  3. The tube will spread the heated air through spray nozzles when you dip it into the bed.

· Perforated Pan

This pan is fully enclosed and will have a partial or fully perforated drum that revolves on its straight axis.

All coating happens inside the pan with the help of spray nozzles.

Some examples include:

1. Driacoater

Supply and exhaust channels are part of the drum wall as reinforcing elements.

Dry air gets in the system via hollow ports on the edge of the drum.

The drum will rotate and dip inside the tablet bed during the drying process.

Dry air passes and fluidizes the tablet bed, and the exhaust air leaves via the back of the pan.

2. Accela-cota or Hi-coater units

They come with perforations that allow solvent and aqueous coating procedures.

Here, the drying air will circulate the drum as it passes via the tablet bed.

Finally, it goes out via the perforations in the drum.

· Fluidized Bed or Air Suspension System

The chamber of this system is a vertical cylinder.

Fluidization will occur as a stream of air flows to the top part of the system.

Tablets at the center of the chamber will move upwards, then go to the exterior then downwards in the wall of the chamber.

It then enters the stream of air again from the lower part of the chamber.

Introduction of the coating solution happens from the upper and lower part of the chamber through the spray nozzles.

There is difficulty in fully coating tablets as the core is fragile and prone to chipping and abrasions.

This is due to tablets getting in contact with one another and with the wall of the chamber.

The two principal systems that will apply spray coating solutions include:

1. Airless System applying High-Pressure

It uses high pressure to deliver an airless liquid spray at temperatures ranging from 250 and 3000 PSIG [1.7 and 20 MPa].

The liquid passes via small orifices with diameters of between 0.02 and 0.2 mm forming fine droplets.

Fluid pressure, orifice dimension, and viscosity will control the degree of atomization.

2. Atomized Systems applying Low Pressurized Air

Pumping of liquids happens via large orifices whose diameter is between 0.05 and 2.5 mm.

It also applies low-pressure levels ranging between 5 to 50 PSIG [35 – 350 kPa].

Low air pressure will contact the liquid stream above the atomizer to achieve a fine spray.

Air pressure, liquid cap orifice, fluid viscosity, liquid pressure, and air cap design will influence atomization degree.

What Should You Consider When Purchasing a Sugar Coating Pan?

It is important to have enough information before you purchase a sugar coating pan.

There are several manufacturers, and these pans have specific capabilities and properties.

This means sugar coating pans will vary from one manufacturer to another.

Here are some factors to consider while purchasing a sugar coating pan:

· Capacity of Air

The quantity of the flow of air within the bed will influence the solvent amount which you can get rid of in the coating procedure.

· Exterior Surface of Tablets

It’s possible for one to determine the coating solution you need by weighing the batch of tablets you are to coat.

The coating solution you will require will depend on the surface of the products you want to coat.

Besides, the nature and dimension of the products will influence the coating solution you require and the coating environment.

The whole area to weigh ratio will be low as you move from small to larger products.

· Composition of the Coating Medium

This will include all products that will stick on the product’s surface together with the solvent that carries the ingredients.

The pan will eliminate solvent during the coating process as air flows via the sugar coating pan.

· Budget

The amount you have will influence the sugar coating pan you can afford.

Ensure that you always purchase one that will meet your production needs.

· Efficiency of Machine

Coating materials that stick on the walls of the pan determine the efficiency of the sugar coating pan.

This is because conventional sugar coating is less efficient, and one accepts around 60% of its coating.

· Dimension

Sugarcoating pans come in different shapes and sizes.

Ensure to purchase a machine that will fit your working station.

For instance, larger sugar coating pans are suitable for commercial companies.

· Quality Standards

It is vital to obtain a machine that meets all the necessary quality standards.

This ensures the machine is reliable, effective, and acceptable in the market.

· Maintenance

Ensure the sugar coating pan is easy to service.

This means making repairs or replacements without using a technician.

Also, make sure it is easy to obtain spare-parts should a need arise.

· Level of Technology

Many industries nowadays incorporate machines that have some level of technology.

This makes it possible for you to achieve high production capacity and produce quality coatings.

Why is it Important to Sugar Coat Tablets?

Here are some reasons as to why it is important to sugar coat tablets:

  • It will seal the odor, color, and taste of the tablets.
  • Controlling the release of drug is possible.
  • Protects acid-sensitive tablets from gastric conditions in the stomach.
  • It minimizes chemical incompatibility.
  • Offers chemical and physical protection to the tablets.
  • Improves pharmaceutical appeal by applying colors and contrasting printing.
  • Assists in maintaining the shape of the tablets.
  • Increases mechanical strength of the tablets.

Sugar coated tablets

Sugar-coated tablets

What Quality Standards should a Sugar Coating pan conform to?

Quality standards will ensure the sugar coating pan meets all safety and health protocols.

The key quality standards that a sugar coating pan should conform to include:

· Kosher and Halal Quality Standards

This ensures the products are acceptable in the Jewish and Muslim communities.

· European Union CE marking

All companies in the world accept this quality standard even though it applies to European Economic Areas.

· International Standards Organization (ISO 9001: 2000) Quality Standards

It ensures the sugar coating pan meets all management systems that ensure high quality.

· Current Good Manufacturing Practices (cGMP) Quality Standard

Current Good Manufacturing Practice quality standard ensures that sugar coating pans undergo:

  1. Consistent manufacturing practices.
  2. Conforms to international quality standards.
  3. Produces high-quality sugar coats.

· Food and Drug Administration (FDA) Quality Standards

FDA will protect the public health, ensuring safe, efficient, and secure sugar-coated products.

What Factors should you Consider when Installing a Sugar Coating Pan?

Several factors determine the success when it comes to installing a sugar coating pan.

Here are factors worth considering:

Sugar coating pan

Sugar coating pan

· Equipment Identification

Sugarcoating pan identification features include:

  1. Serial number
  2. Model number
  3. Purchase order number
  4. Location of machine
  5. Component elements
  6. Company number

· Machine Documentation

Check for all manufacturer, machine maintenance, and manual.

Also, make sure you have the diagram of the machine.

· Safety Features

Make notes of all safety features the manufacturer has in the sugar coating pan.

· Utility Requirements

Compare the specifications of the machine with what the manufacturer includes.

· Lubrication System

Take note of the specific lubricant the machine uses and if it gets in contact with materials.

· Components of the Machine

Ensure the availability of all components that make up a sugar coating pan.

How can you troubleshoot a sugar coating pan?

A sugar coating pan can experience some problems that you can easily solve, and they include:

· Rough Tablets

Solve this by lowering the drying conditions which will minimize the roughness.

Also, add solvents and reduce polymers to the mixture, and reducing the spray rate.

· Irregular Colors

This is due to uneven mixture and spraying of products.

Properly adjust the spraying instructions and change plasticizers and additives.

· Tablets Chipping

Solve this by adjusting the number of plasticizers in the solution and using polymers with high molecular weight.

· Blistering Tablets

Combat this issue by using low drying conditions and moderate temperatures.

What is the Difference Between a Sugar Coated and a Non-sugar Coated Tablet?

Sugar-coated tablets have a coat of sugar around them while non-sugar coated have no sugar coating.

It is easy to swallow sugar-coated tablets than it is to swallow tablets that have no sugar coating.

Tablets with a sugar coat exhibit a high shelf life as the coat protect the tablet from physical and mechanical damage.

Non-sugar coated tablets disintegrate faster than tablets that have a sugar coating.

Tablets with a sugar coat usually contain a bad taste and odor.

Besides, most non-sugar coated tablets have a good odor and taste, therefore need no coating.

What is the Disintegration Time of a Sugar Coated Tablet?

Sugar-coated tablets take more than half an hour to disintegrate.

They will only disintegrate in the right condition.

Also, they may not disintegrate when you expose them to the acidic conditions of the stomach.

This factor will protect the tablet from extreme stomach environments.

How much does a Sugar Coating Pan Cost?

A sugar coating pan will cost anywhere from 450 US dollars to 30000 US dollars.

At SaintyCo, we design and manufacture a range of film coating machines you can easily integrate with tablet press machines.

Contact us today for all your sugar coating pan machines.

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