Preform and container for radiosensitive products and method for the manufacturing thereof

Abstract

The present invention provides a prefabricated component which is used for container as intermediate product. The container is used for containing product therein. The product is food or milk product which is sensitive to radiation, especially to light. The prefabricated component is at least composed of a base layer (1) which is mainly composed of plastic-based material, and furthermore the base layer (1) is added with a certain amount of additive (5). The invention is characterized in that the prefabricated components (10, 20) are almost nontransparent in the whole area, wherein the plastic additive (5) with a relatively low percentage is introduced for generating nontransparent appearance (22) thereby protecting the confined inner space (9) from the external radiation (V1, V2) at the condition of normal atmosphere. The external radiation is specifically electromagnetic radiation, and more particularly the effect of light.

Description

technical field [0001] The present invention relates to containers for containing radiation-sensitive, in particular light-sensitive, essentially food industry products, more particularly milk and further dairy products, including those fortified or containing fruit Nutraceuticals and dairy products. [0002] The invention also relates to a preform as a semi-finished product for the production of such a container, consisting of at least one base layer made of predominantly plastic material into which a certain amount of additives has been introduced. Background technique [0003] Plastic containers, including bottles made of polyester, especially polyethylene terephthalate (PET), are increasingly used to package food and beverages. PET containers were originally used for carbonated beverages, such as soda. They have since made important advances in all areas of the food segment, such as beverages (including milk). [0004] Polyethylene terephthalate is an excellent materi...

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Problems solved by technology

[0013] European patent application EP 0 974 438 A1 by TEIJIN Ltd also describes polymer blends, but said polymer blends are for transparent containers, the light-shielding properties of which appear to be unsatisfactory, or at least require significant improvement

[0014] European patent application EP 0 273 897 A2 of MONSANTO EUROPE S.A. describes pressure vessels of the aerosol type made of transparent preforms made of a mixture of PET and styrene-maleic anhydride (SMA) copolymer type additives Composition, but the concentration of additives is still up to 30%

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