DE889221C - Utility item made of natural cork, pressed cork or so-called schoentem cork, especially cork used to close bottles or vessels - Google Patents

Description

Utensil made of natural cork, pressed cork or so-called embellished Cork, especially cork code used to close bottles or jars found for various purposes because of its porosity, elasticity, its thermal properties, its low specific weight and its light weight Machinability a preferred application, especially z. B. for closing of bottles and vessels in the form: the well-known bottle cork, the sealing washer, so-called crown caps, etc. Unfortunately, the material cork also has different less desirable properties. He is z. B. various chemical influences easily attackable and wears out under certain mechanical loads, like .z. B. Friction etc., very quickly. Also, despite its widespread use Use for closing bottles, jars etc. not an ideal closure, not even because it is permeable to air and moisture due to its porosity is, on the other hand, because he z. B. with taste-sensitive bottle or vessel contents has a negative effect on taste.

Against air and moisture permeability of the corks or cork discs Impregnating agents have already been proposed, including sealing wax and paraffin are to be mentioned in the first place. Sealing wax can only be used on the exterior mirror of a bottle or jar cork and is also brittle and to be transported Bottles or jars not applicable, and paraffin scrapes at Close the bottle or jar neck slightly and contaminate the bottle neck or vessel content.

According to the invention, cork goods of all kinds are, but preferably Bottle cork 6 or Crown cork discs or similar cork products for sealing purposes, completely or partially covered with a film made of an elastic plastic, * as which z. B. brought into solution mixed cords from polyamidbil.denden Substances that should be mentioned first of all are those that appear completely after they have dried or hardened : a dense, snug-fitting cover that is common to all such cork products Occurring loads and temporary changes in shape (elastic changes in shape) grown and so indifferent to certain chemical influences that he remains tasteless and odorless.

Plastics that meet these requirements are available to those skilled in the art large selection available, it would be impossible to list them all here in detail. So are z. B. useful solutions for the purpose of the invention. and lacquers of cellulose acetate. So-called reaction varnishes can be found that are made from a mixture of polyesters and diisocyanates exist. It is entirely up to the expert whether he wants to Cork products in one operation in the solution mixture or in two operations dip one after the other into the solutions of the components of the mixture or these Solutions by spray gun_od. Like. Want to apply to the cork products.

Thermoplastic plastics, such as. B. polyethylene, polyvinyl chloride or others, you can z. B.. Apply in such a way that the fabrics are applied over the Heated to softening point, if necessary in vacuo, and by immersion the cork products in the heated mass with this coats.

Also in the corresponding forms of a plastic molding machine or plastic injection molding machine can use the cork products for production. a wafer-thin elastic film made of suitable Plastic can be inserted or one can subsequently in such a manufactured KOI'ken Insert molded parts or hollow bodies. On plate-shaped poop objects could z. B. the plastic films are rolled in a gluing machine. Be repeated that under the name cork goods not only bottle or jar corks od. Like. Are to be understood, but also, for example, floats made of cork, cork fillings for swimming belts, cork furniture, lids or plates made of cork, templates made of cork, Cork bath mats, cork wall tiles, cork wallpaper, cork soles and insoles. In all these and similar applications, the ones valued in cork remain Properties such as heat or sound insulation, elasticity, little specific Weight, etc., and its less valued properties, such as sensitivity against certain mechanical frictional loads, chemical influences, etc. switched off.

This not only applies to goods made from natural cork, but also to Goods made from so-called pressed cork and embellished cork. Understood by the latter one large-pore inferior cork, whose large pores are filled with a filling made of cork flour are partially filled with binding agents. Such a cork tends to to crumble, @d. H. the filling trickles when subjected to mechanical stress of the relevant Cork object out of the pores again.

A film overcoat. According to the invention made of plastics prevents that and also makes the beautified cork a full-fledged material, which is considered to be significant Progress is to be assessed.

Claims (2)

PATENT CLAIMS: r. Utensil made of natural cork, pressed cork or so-called embellished cork, especially for closing bottles or vessels . Serving cork, characterized in that it is completely or partially covered with a film made of elastic plastic, e.g. B. a mixture condensation product of polyamide-forming Substances, a solution or a varnish of cellulose acetates, a mixture of polyesters and diisocyanates or the like., Coated. 2. commodity according to claim t, characterized in that it is coated with a thermoplastic material, e.g. B. Polyethylene, Polyvinylchlori.d or the like. Is completely or partially coated.