Subproducts

Instamoistshield Aqua II

Product Description

INSTAMOISTSHIELD is a PVA based, fully formulated, high-performance dry powder film coating system for use with aqueous solvent systems. It can be used as a basic film coating system in its own right or as a protective seal coat prior to further processing. It is suitable for all types of coating equipment.

Resources
Features Benefits

INSTACOAT System

  • Dry powder system for reconstitution
  • Process time savings from rapid coating suspension manufacture
  • Complete coating formulation minus solvent
  • Cost savings in inventory and inventory management
  • Advanced colour control methods
  • Reproducible finished product appearance
  • Avoidance of customer complaints
  • White or ready coloured systems matched to your specification or sample are available. Anti-counterfeiting and branding features can be built-in
  • Meeting diverse marketing requirements is facilitated
  • Colours used are checked for compliance with appropriate regulations in target markets
  • Avoidance of regulatory issues

INSTAMOISTSHIELD AQUA II

  • PVA based polymer system
  • Coatings are smooth, glossy and resilient to physical damage. Packaging speeds are enhanced.
  • Solids levels up to 20% facilitate rapid coating thus significant productivity gains
  • PVA is highly water soluble
  • Minimal impact on dissolution and disintegration.
  • Aqueous processing promotes a safe working environment and avoidance of atmospheric pollution
  • Glidant
  • Overcomes polymer tack issues and contributes to coating speed
  • Soya lecithin is excluded
  • Avoidance of regulatory issues
  • Can be applied in a wide range of equipment designs and sizes from most manufacturers
  • Easy scale-up and transfer to different equipment types or manufacturing sites.
  • Suitable for batch and continuous processes

Regulatory information

All products are checked for the regulatory compliance of all ingredients in the target countries and market segments of sale. This determination is made at the time the initial formulation is established, based on customer-supplied information. If market countries and/or segments are extended once the formulation has been established, customers are encouraged to contact us to ensure that regulatory compliance is not compromised.

Recommended Solvent System and Reconstitution Level

  • Purified water at up to 20% w/w solids.

Equipment / Accessories

  • Variable-speed mechanical stirrer
  • Mixing Vessel

Calculation of Instamoistshield Aqua II and solvent quantities

  • Determine the quantities of Instamoistshield Aqua II (20% w/w solids) and water required based on the quantity of tablets to be coated and the target coating weight gain. e.g.: For coating 1.0 kg of tablets to 4% wt. gain, weigh 44 g Instamoistshield coat and 176 gm purified water at room temperature (includes 10% overage for losses).

Reconstitution Process

  • Add the weighed quantity of water to a mixing vessel.
  • Using a mechanical stirrer, stir the purified water to form a vortex.
  • Add required quantity of Instamoistshield Aqua II to the centre of the liquid vortex in a slow steady stream, avoiding clumping while maintaining a vortex. Once the entire quantity of Instacoat has been added, reduce the stirrer speed to eliminate the vortex. (Fig. 2) Continue mixing for 45 minutes.

Recommended Process Conditions

  Side-vented
(fully perforated) pans
Conventional
(non perforated) pans
Pan diameter (inch) 24-60 12-36
Tablet load (kg) 10-300 0.5-50
Weight gain (%) 4.0%
Number of guns 1-6 1
Liquid nozzle diameter (mm) 1.0-1.2
Atomising air pressure (bar) 2.5-3.5
Pattern air pressure To achieve maximum uniform bed coverage
Tablet bed temperature (⁰C) 42-45
Inlet air temperature (⁰C) Set to achieve required product bed temperature
Suspension spray rate Set to achieve required product bed temperature
Exhaust air volume To maintain slight negative pressure in pan
Pan speed Minimum for steady tablet flow through spray zone

*Tablet bed temperature offers the most effective way of controlling the coating process. Where this measurement is unavailable, exhaust temperature may be substituted. However, the relationship between the two measurements is complex and depends on several factors such as pan load, pan depression, pan design and airflow rate. Indicated exhaust temperature may be above or below the true bed temperature. It is recommended that the relationship between the two measurements is calibrated.

Typical Constituents

PVA; Plasticiser; Titanium Dioxide; Edible Pigments; Anti-Tack & Adhesion Enhancing agents.