Cover piece for preventing contents adhering

Abstract

The invention provides a cover piece for preventing contents adhering. The outer surface of a thermal heating layer (5) stacked on a substrate layer (1) adopts wet silicon dioxide particles to form an anti-adhering layer (6). The wet silicon dioxide particles are formed by conducting hydrophobic treating on polyorganosiloxane having over 100cst of viscosity and especially dimethyl polysiloxane, which are used as treating agents. Or the outer surface of the thermal heating layer (5) stacked on the substrate layer (1) adopts the following wet silicon dioxide particles to form an anti-adhering layer (6). The wet silicon dioxide particles are hydrophobic wet silicon dioxide particles, whose di-n-butylamide adhering amount (DBA adhering amount) is below 200mmol / kg. The cover piece for preventing contents adhering is advantageous in that thermal sealing performance and sealing performance are well maintained; content like yoghourt can be effectively prevented from being adhered to the back face of the cover.

Description

technical field [0001] The present invention relates to a heat-sealable lid mainly used in food packaging containers, and more specifically, to a cup-shaped container used in packaging of yogurt, jelly, pudding, jam, and milk coffee (Caffellatte). Cover with anti-adhesion of contents. Background technique [0002] This type of heat-sealing (heat-sealing) lid (lid material) is generally formed on the aluminum foil side of the base layer composed of a laminate of base film and aluminum foil, with an intermediate resin layer interposed therebetween if necessary. A cover with a heat-sealing agent, that is, a heat-sealing layer (heat-sealing layer), which covers the upper opening of the cup-shaped container body filled with packaged objects such as yogurt, and is heated by fusing the peripheral part to the container body. On the upper edge flange part, to form a sealed package. [0003] Therefore, such a cover is required to have good heat-sealability, airtightness, and suitabl...

AI Technical Summary

Problems solved by technology

[0010] However, on the other hand, since the particle size of wet silica particles is relatively large, compared with the case of using dry silica particles composed of aggregates of ultrafine primary particles, the coating amount (adhesion amount) ) The surface hydrophobicity in the relative relationship is poor. In order to obtain high anti-adhesion performance, a slightly larger amount of hydrophobic wet silica coating is required. Therefore, there is also adhesion (adhesion; Adhesion) is easy to deteriorate, and further improvement in these aspects is strongly required for practical use

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