Hard Confectionery Products Containing Mainly Xylitol and a Process of Preparing Same

The invention relates to hard confectionery products, such as sweets, containing mainly xylitol and a process of preparing such products.

Traditionally, hard sweets have been prepared by concentrating solutions containing mainly saccharose and glucose syrup to a low water content. The product so obtained has a "glass-like" structure. In this specification, the term "traditional structure" is intended to means such a glass-like (amorphous) structure, which can soften quietly in the mouth. Such structure results in a particular palatability, i.e. feeling in the mouth. Since both saccharose and glucose syrup are good sources of energy for bacteria causing dental caries, attempts have been made to replace such substances by more tooth-friendly substances, such as sorbitol and above all xylitol. However, it has proved difficult to prepare hard sweets containing a high amount of xylitol.

Finnish Patent 61 265 discloses a process of preparing hard sweets containing xylitol. In this prior art method, powdered xylitol is added to melted xylitol in an amount of 10 to 30% by weight, counted on the total amount of the confectionery material, at a temperature not greater than approximately the melting point of xylitol (96.degree. C.). The resultant melt is poured into moulds and allowed to cool; thus the prior art process is not continuous. In addition, the prior art process is technically difficult and its industrial application has not been possible.

In one aspect the present invention provides a hard confectionery product having a traditional structure characterised in that it is mainly composed of xylitol.

In accordance with another aspect of the present invention it has also been found that hard confectionery products containing a high amount of xylitol can be produced by heating a mixture containing 5 to 20% by weight of xylitol, preferably 7 to 10% by weight of xylitol, 85 to 70% by weight of maltitol or lactitol, and less than 15% of other sugar alcohols, to a temperature of from 170.degree. to 175.degree. C.; by allowing the resultant melt to cool to a temperature ranging from 105.degree. to 120.degree. C., preferably from 110.degree. to 115.degree. C.; and by subsequently rapidly adding 30 to 60% by weight of powdered xylitol, preferably 35 to 55% by weight, counted on the amount of the melt, while mixing carefully, and shaping the resultant mixture into a confectionery product, such as a sweet. In addition, the process may be continuous.

The confectionery product according to the invention may contain 45 to 65% of xylitol, preferably 50 to 55%, and it can be flavoured by means of aromatic substances known per se in the preparation of confectionery preferably, the product has a xylitol coating.

The moulding machine may be a rolling machine, a filled-sweet production line, and a toffee, cutting and wrapping machine.

The maltitol is preferably derived from maltitol syrup such as "Finnmalt" or "Melida", but it is also possible to use crystalline maltitol, or sugar alcohol mixtures containing mainly maltitol, such as "Palatinit" and "Lycasin", which contain less than about 8% of sorbitol, 60 to 90% of maltitol, and 10 to 40% of other sugar alcohols.

The lactitol used is preferably a lactitol monohydrate or a lactitol dehydrate.

The addition and mixing of powdered xylitol can be carried out e.g. in a Z mixer or in an extruder mixer. The mixing should be effected rapidly (from 30 seconds to 2 minutes) and effectively; however, the temperature of the mixture should not exceed 90.degree. C. during mixing.

The following non-limiting Examples illustrate the present invention.

A mixture containing 1280 g of maltitol syrup ("Finnmalt"; containing less than 8% of sorbitol, 60 to 65% of maltitol, and 30 to 35% of other sugar alcohols; dry substance content 75.+-.1%; manufactuer Finnsugar Ltd, or the like) and 120 g of xylitol was heated to 175.degree. C., whereafter it was cooled to 115.degree. C. The humidity of the mixture was thereby 1.3%. At this point, 980 g of powdered xylitol %nd 4 ml of mint aroma were added rapidly to the mixture while mixing carefully; the temperature of the resulting mixture was about 62.degree. C. The mixture was allowed to cool to about 40.degree. C., whereafter the mass was shaped in a cold rolling machine, and wrapped.

A mixture containing 700 g of maltitol and 200 g of xylitol and small amounts of water was heated to 170.degree. C., whereafter the mixture was cooled to 112.degree. C. Thereby the humidity of the mixture was 1.3%. At this point, 1100 g of powdered xylitol and 4 ml of mint aroma were added rapidly to the mixture while mixing carefully, the temperature of the resulting mixture being maintained below 65.degree. C. Thereafter the mixture was cooled to about 42.degree. C., and the mass was shaped in a cold rolling machine and the shaped product was wrapped.

A mixture containing 700 g of lactitol and 200 g of xylitol and small amounts of water was heated to 170.degree. C., whereafter the mixture was cooled to 112.degree. C. Thereby the humidity of the mixture was 1.3%. At this point, 1100 g of powdered xylitol and 4 ml of mint aroma were added rapidly to the mixture while mixing carefully, the temperature of the resulting mixture being maintained below 65.degree. C. Thereafter the mixture was cooled to about 42.degree. C., and the mass was shaped in a cold rolling machine and the shaped product was wrapped.

The shaped product obtained as described in Example 1, 2 or 3, was coated before wrapping.

In a coating vessel, the product was treated at 75.degree. C. with a xylitol syrup (the syrup was prepared by mixing 16.5 kg xylitol and 7.3 1 water at 120.degree. C. and by adding a gum arabicum solution (50% gum arabicum and 50% water; 70.degree. C.) as well as colours and aromas). Xylitol powder was added, whereby hard dragees were obtained. This coating step was repeated twice. After drying and glossing the product was wrapped.