DE102004050516A1 - Production of pan-coated products e.g. confectionaries or nuts involves applying solution or suspension of polyol to core; dusting polyol in powder form; and drying - Google Patents

Abstract

Production of pan-coated products comprising a core and non-hygroscopic coating (preferably sugar-free coating) involves a) applying a solution or suspension of polyol(s) as a coating medium to the core; b) dusting the polyol (30 - 75, preferably 50 - 60 wt.%) in powder form; c) drying at 20 - 80[deg]C; and d) optionally repeating the steps (a) - (c) for 5 - 50 (preferably 20 - 40) times. Preferably the coating comprises at least two layers.

Description

The The present invention relates to improved coating methods and coated products made with it.

In The coating technology, there are various methods such as the hard darting (with or without powder addition), the soft draging (always with much Powder addition), the solution draging (with or without powder addition), and suspension dragee (with or without powder addition).

panning are extraordinary lengthy processes, usually in the process sequence a) coating medium feed, b) distribution, c) optionally adding powder and d) drying.

These Process steps become frequent (80-120 times) repeated and in this way a gradual layer structure achieved on the drageeing product. This changes order quantities, Distribution times, number of cycles of the individual phases and drying times in the individual phases.

Of the Specialist always strives to produce a good product in a short time. Nevertheless, it is still today failed to achieve significant process accelerations.

There repeatedly water are evaporated and at the same time sticking together the Dragierguts or sticking to the apparatus prevented must, can not arbitrarily large solvent or suspension quantities are sprayed onto the estate. As a result, the duration of the coating processes is lengthy and uneconomical.

One method that attempts to circumvent these disadvantages is the so-called Lycoat method (US Pat. EP 0 625 311 B1 ) using the polyol maltitol.

In a company publication (The World of Ingredients, October 1999, page 59), this novel process is compared to the conventional process. This saves time from 3 hours 30 minutes to 2 hours and described for 30 minutes. The comparison was done in a panning Dumoulin TVV 600 carried out with 5 kg of deposits.

at a reworking in a Driacoater DRC 500/600 Vario with 7.5 kg deposits became a coating time according to the so-called Lycoat method needed by 3 hours and 19 min.

The WO 00/38532 describes the powdered addition of isomalt, wherein the amount of powder (Example A: 0.23 kg by 15 = 3.45 kg) or at Example 3 Syrup 7: 8.1 kg; this is 7.8% and 17.3%, respectively, of the total amount of isomalt.

One Disadvantage of the two above teachings is that the surfaces of the coated products obtained by these two methods rough and colored Dragees are spotty or the coating times are not sufficient shortened can be.

In WO 00/38532 is a maximum time savings of 3 hours 33 Minutes to 2 hours 27 minutes described that means saved will be 1 hour and 6 minutes or 31%. This only affects the actual Dragee-Coating.

One considerable disadvantage of the method described in WO 00/38532 is that two different syrups are used. This results higher for new plants Investment costs and a more complicated, less disruptive production process.

Out For economic and technological reasons, therefore, there is an urgent need Need a smooth, crispy, well dyeable product in as possible produce a short time and with little effort.

In particular, the present invention relates to a process for the preparation of sugar-coated products, in particular sugar-free products, comprising a core, for example a sugar-free core, and a Preferably, sugar-free, drageous, wherein the Drageedecke consists of at least one, preferably several layers of dragees or comprises, wherein in a first step, a coating medium, comprising a solution or suspension of one or more polyols, is prepared and this coating medium then, in particular partially on applied to the core and then sprinkled with a comparatively large amount of one or more powdered polyols and subsequently dried at 20 ° C to 70 ° C and wherein the process sequence applying the dragee, then scattering with one or more powdered polyols and subsequent drying at 20 ° C to 70 ° C, preferably 25 ° C to 50 ° C, in a particularly preferred embodiment more than once, in particular 10 to 50 times, preferably 20 to 40 times. According to the present invention, therefore, a coating medium, comprising a solution or suspension of one or more polyols prepared, applied to a core, sprinkled with large amounts of one or more powdered polyols, dried the coated layer, this process sequence can be repeated, in particular for Example 10 to 50 times, preferably 20 to 40 times. In particular, the invention relates to an abovementioned process, wherein the amount of one or more powdery polyols used for scattering the applied coated layer or layers, in particular 25 to 75 wt .-%, preferably 30 to 60 wt .-%, in particular 40 up to 55% by weight, in each case based on the total dry substance of all polyols applied in the coated tablet, ie in all layers.

In particularly preferred embodiment The core of the coated product is a bubble gum core respectively insert or cushion. Of course, however, can also be provided be as kernel a nut, hard or soft caramel, hard or soft snack foods, other sweets, a tablet, a compressed product or select any other product suitable for coating is, for example, animal food, pesticide-containing body, herbicide-containing Body, Catalyst, detergent, etc.

In particularly preferred embodiment it is envisaged that the amount of powdered in the framework of the scraping used polyol or more polyols 25 to 70 wt .-%, preferably 30 to 60 wt .-%, in particular 40 to 55 wt .-% (in each case on the total dry matter) of the total applied to the core Amount of polyol is, that means based on the sum of the amount of all applied Polyols.

The inventive method is characterized in that one has a coating medium, so a solution or suspension, for example a mixture of a dissolved polyol and possibly an unresolved one Polyols (also called suspension component), at elevated temperature, for example 40 to 80 ° C, preferably 45 to 55 ° C and after the application or distribution phase on the core to be coated with significantly larger amounts of a fine polyol powder abstreut. In addition, the temperature of the drying air is higher than in usual Method. The frequency of the addition and the amount of powder will be in usual Adapted to the corresponding polyol.

Surprisingly receives in this process hard, smooth, well dyeable, crunchy products at one extraordinary fast layering.

It is also surprising that despite the invention preferred increased Dry air temperature of 20 to 70 ° C, preferably 25 to 50 ° C, the temperature-sensitive Deposits in the case of chewing gum (softening temperature about 30 ° C) dimensionally stable stay.

Of the percentage of the polyol added as a powder with preferably> 50 %, based on the total dry matter of all applied in the ceiling Polyols up to three times as high as the proportion in WO 00/38532 (Example 3) and almost seven times as high as in Example A of WO 00/38532, what an extraordinary economic procedure results.

The Time savings in the process according to the invention is 53% (compared to Example 3 of WO 00/38532) and even 68% compared to Example A, that is, in cases, in which previously possible a coating were in the same time unit two or three coatings possible.

This is an extraordinary one greater advantage over the state of the art.

Full Description of the procedure

The to be coated deposits are in a preferred embodiment in given a dragee and possibly first of adhering dust released by movement and air extraction.

The solvent or suspension production is carried out by the residue-free Dissolve the Polyols at elevated Temperature, the addition of other optional ingredients, for example Gum arabic, color, aroma, active ingredients, etc. In addition, if necessary the intended as a suspension component polyol added.

These solution or suspension is elevated at Temperature, for example 40 ° C up to 80 ° C, preferably 45 ° C up to 55 ° C touched and, preferably in portions, on the moving cores or Inserts applied, in particular sprayed.

To the order phases, in particular Aufsprühphasen is the powder scattered polyol scattered evenly over the moving deposits, whereby the quantities can be increased in the course of the process and whereby these quantities a total of 25 - 75 % of the polyol used and applied throughout the coating process turn off. This amount is far higher than in previously described methods.

There the temperature of the coating medium is increased to above 40 ° C, in particular above 50 ° C, preferably above 55 ° C, and the drying air temperature is also high, it is possible to produce large quantities Apply dry matter per unit time to the drageeing material; At the same time, the addition of powder also makes a lot and is fast Dry substance applied to the deposits.

advantageously, is in a preferred embodiment the liquid and the powdery order quantity in the course of the process successively elevated.

When For example, polyol can be 1,6-GPS, 1,1-GPM, isomalt, for example Isomalt ST or isomalt GS, erythritol, xylitol, maltitol, sorbitol or Mixtures thereof are used.

It is possible, too, Add sugar such as isomaltulose in the ceiling.

Advantageous is a preferred particle size distribution of the powder added as polyol in the range of 90% <50μm to 90 % <100μm.

The Powder may in a preferred embodiment consist of isomalt ST-PA (Isomalt ST with grain size 90% <50μm) or isomalt GS-PF or GS-PA (Isomalt GS with grain size 90% <50μm).

By the big ones Coating time-saving Pulverzugabemengen is also the number of applications clearly lower, making it possible is, with less than 30 orders to get smooth layers.

Amazingly, The resulting layer of sugar is smooth, hard and crispy.

The time savings compared to the method of EP 0625 311 B1 is - with a comparable ceiling content - about 50% and compared to the method of WO 00/38532 about 35%. This means that an increase in throughput of approximately 30-50% is possible in production plants, which leads to significant cost savings in these batchwise production processes.

By the invention improved preferred addition of a fine powder in dry form (in contrast for addition in the suspension), the fine crystals are retained.

It It is known that isomalt from the components 1-O-α-D-glucopyranosyl-D-mannitol (1,1-GPM) and 6-O-α-D-glucopyranosyl-D-sorbitol (1,6-GPS) consists. Solids of these two substances behave in aqueous solutions different, that means the two different crystals show clearly different solutions and crystallization behavior.

This means that the grain size and the Composition of the solid particles as a function of time and temperature in liquid Drage media are different sizes.

It can not be ruled out, that by long residence times in containers and lines, for example by Concentration or dilution processes a part of the crystals grow or a part will dissolve. In the method according to the invention This risk is reduced because the overall draging process is essential is faster.

in the Unlike the prior art, it is also not necessary to use two different coating media. It is enough, a liquid Casing medium, that means a solution or suspension and a Powder of suitable particle size distribution in the process according to the invention use.

At the Although so-called soft drages are also large quantities of a powdered sugar or Sugar alcohol alternately with a liquid dosage to be coated Deposits abandoned. In contrast to the method according to the invention however, neither temperature nor drying air is used there, so that in the final product still 7 - 10 % Moisture are included. This is also required because the final product of softdrinking should be soft in the bite. In addition, when softdragieren only about 3 - 10 Dragee layers applied.

The new process thus differs from both harddraging as well as from softdraging.

The special conditions of the process according to the invention ( amount, temperature of the liquid Phase and the drying air), however, produce coated products, the one surprising show hard, crispy and smooth surface.

Of the Time advantage of the method according to the invention limited not only on the actual coating process (lower water evaporation), but also on the preparation of the coating medium. Because less Polyol dissolved has to be, also results here, a time and cost savings.

opposite the description in WO 00/38532, which states: "Sometimes dry charging can be used in hard panning, but is usually very limited in the amount of dry charge Material and used for a few applications during the process. "Is in the process according to the invention with a lot of powder and often while of the coating.

highly concentrated Solutions, size Order volumes and rapid crystallization are considered causes of problems Hard-impacting (sticking, uneven, rough surfaces) (Source: Technology of hard, soft and chocolate production, Frank Perchtold, ZDS Solingen / D in Introduction Manufacturing Technology Dragees, ZDS, 09. - 13. October 2000).

• – Lösung erwärmen oder verdünnen
• – langsamer trocknen
• – Auftragslösung verdünnen
• – Einlagentemperatur senken
• – Viskosität herabsetzen
• - Lösungsmenge pro Auftrag reduzieren
• - Trockenzeit zwischen den Aufträgen verlängern

As a remedy, we recommend:

• - Heat or dilute the solution
• - dry more slowly
• - Dilute order solution
• - Lower deposit temperature
• - reduce the viscosity
• - Reduce the amount of solution per order
• - Extend drying time between orders

• – die Lösung bleibt bei gleicher Temperatur unverdünnt
• – es wird schneller als üblich getrocknet
• – das Auftragsmedium ist und bleibt hochkonzentriert
• – die Temperatur der Trocknungsluft und damit die der Einlagen wird während des Verfahrens sogar erhöht
• – die Viskosität wird nicht verändert
• – die Auftragsmenge pro Auftrag wird gesteigert
• – und die Trockenzeit ist erheblich kürzer als bei Standardverfahren

In the method according to the invention, almost the opposite is done for almost every point:

• - The solution remains undiluted at the same temperature
• - It is dried faster than usual
• - The application medium is and remains highly concentrated
• - The temperature of the drying air and thus the deposits is even increased during the process
• - the viscosity is not changed
• - The order quantity per order is increased
• - and the drying time is considerably shorter than with standard methods

As is easily recognizable, is largely in the process of the invention worked contrary to the prior art.

It is therefore all the more surprising that the products clearly the Show features of a hard-coated product.

Also the amount of coated dragees is 3.9% (390g / 9990g) surprisingly low. Such agglomerates are quite common, at least for the first time new coatings. Given the large order volumes and the very short drying times, the agglomerate content is extremely low and unexpected.

example

4.365 kg of Isomalt GS were dissolved in 2.9 l of water at 65 ° C. and 2.215 kg of Isomalt ST-PF were added, during which the temperature decreased somewhat. Further, gum arabic 0.41 g (50% solution) and 50 g of TiO ₂ to the liquid phase is added. This dragee suspension was sprayed on 7.5 kg of chewing gum inserts (pillow-shaped). During the distribution times, a total of 2.18 kg of Isomalt ST-PA were sprinkled evenly over the moving, damp deposits and then dry air at 25 - 50 ° C passed through the dragee bed. The following table summarizes the phases and feed quantities (liquid and powder).

The Total drag time is (without shining) 69 minutes; the ceiling proportion is 33% of the dragée weight. The product is crispy and has a smooth surface.

example

Driacoater DRC 500/600 Vario, deposit 7.5 kg

Total: 26 doses with 2.00 kg DM (from panning medium) and 2.18 kg powder 52% of the polyol is applied as a powder

Claims (14)

Process for the preparation of coated products, comprising a core and a, preferably sugar-free, coated tablet, wherein the Drageedecke at least one Drageeschicht, preferably 5 includes several to many layers of dragees, and wherein the drageous cover is applied to the core, that as Dragiermedium a solution or suspension of one or more polyols and this coating medium in a method step a) for applying a layer of drag on the core brought up and then in a process step b) with one or more powdery polyols is scattered, and then in a process step c) is dried at 20 ° C-70 ° C, and wherein the amount of powder or powder Polyols 25 to 75 wt .-% (based on total dry matter of the Polyols 15 or the polyols in the blanket) preferably 30 to 60 Wt .-% (based on total dry matter of the polyol or the Polyols in the blanket), in particular 40 to 55 wt .-% (based on Total dry substance of the polyol or polyols in the blanket) and optionally being provided may be, steps a), b) and c) alternately several times, preferably 10 to 50 times, in particular 20 to 40 times to repeat. Method according to claim 1, characterized in that that the polyols from the group of sugar alcohols and sugar substitutes selected become. Method according to claim 1 or 2, characterized that the dry matter content of the coating medium in the range 50 to 90%, preferably 70 to 85%. Method according to one of claims 1 to 3, characterized that in dissolved Form and / or present as a suspension component and / or Scattering used polyol from the group of disaccharide alcohols selected becomes. Method according to one of claims 1 to 4, characterized that the polyol is 1,1-GPM, 1,6-GPS or isomalt, preferably a 1,6-GPS (6-O-α-D-glucopyranosyl-D-sorbitol) -enriched Mixture of 1,1-GPM (1-O-α-D-glucopyranosyl-D-mannitol) and 1.6-GPS. Method according to one of claims 1 to 5, characterized that for spreading a powder with a particle size distribution 90% <50 microns to 90 % <100 μm used becomes. Method according to one of claims 1 to 6, wherein the temperature of the coating medium when applying the coating layer (s) 40 ° C to 80 ° C, preferably 45 ° C to 55 ° C. Method according to one of claims 1 to 7, characterized the temperature of the drying air in step c) is between 25 ° C and 50 ° C. Method according to one of claims 1 to 8, characterized in that gum arabic, flavors, colors, active ingredients, intense sweeteners, pharmaceutical agents, nutraceuticals, tooth-mineralizing substances to be used in the ceiling. Method according to one of claims 1 to 9, characterized that after a first group of layers a second group 25 of layers with a different composition is brought up to Example, a group of dye-containing layers. Method according to claim 10, characterized in that that the polyol of the second layer type isomaltulose, erythritol or Xylitol is. Product obtained according to one or more of claims 1 to 11th Product according to claim 12, characterized that this from the group of sweets, Nuts, Hard and soft caramels, hard and soft snacks, tablets, Comprimate, Kau gummidragee is selected. Product according to claim 12, characterized that this is an animal food, pesticide-containing body, herbicide-containing Body, Catalyst, detergent or the like is.