DE4412019C2 - Metallized paper cigarette wrapper and process for its manufacture - Google Patents

Abstract

Metallised packaging material (I), esp. for packaging cigarettes, comprises paper coated with a layer of metal in amts. of 0.02-0.25 g/m<2>, and with a layer of slip additive (II) applied to the metal layer in amts. of 0.5-100 mg/m<2>. Also claimed is a process for the prodn. of (I), by applying (II) to metal-coated paper as above.

Description

The invention relates to an internal cigarette wrapper metallized paper with an applied thereon Lubricant, and a process for its preparation.

Paper or plastic films with a metal coating widely used as packaging materials. On typical field of application is the packaging of cigarettes with a cigarette wrapper or winder aluminum coated paper. This cigarette winder forms the inner lining of the cigarette box and is supposed to protect against loss of aroma and drying out of the Ensure cigarettes even after long storage.

Inner cigarette wrappers usually consist of one Composite of paper and aluminum foil, being on the An aluminum foil is laminated on. Because of the high cost of aluminum, of which such Compound about 20 g / m² are required, and also for reasons of difficult material separation, one is already too passed over instead of the paper / aluminum foil composite to use a metallized paper. The metal part, usually aluminum, is only about 0.02 up to 0.25 g / m² and is negligible when recycling.

The evaporated or otherwise applied Metal layer, however, tends to be unlike a continuous one Aluminum foil in aluminum / paper composite or one on Plastic film applied metal layer in the Transport, embossing and folding processes in the machine run for peeling. The exfoliated metal particles can thereby disturbances in the sensitive electronics of the  high-speed machine as well as deposits in the Machines or the packaging so that the Metal layer protected against abrasion with a protective lacquer must become.

The disadvantage here is that the application of protective varnish requires complex and costly painting process, to get an even covering protective layer. Furthermore, the protective lacquer layer leads to problems with Recycling the paper.

The use of protective lacquers on metallized foils or papers is mainly based on the prejudice that a detachment of metallic particles from the Metal layer can only be prevented by this Particles protected against abrasion by a protective lacquer will. According to DE 14 61 217 C3, the metal particles become whole bound in a binder.

DE-OS 36 32 376 proposes instead of paper a biaxially stretch oriented one made by extrusion and to use metallized plastic film. Before the Metallization of the plastic film must be the surface are corona treated, with the metal layer also here their protection can be painted.

DE-OS 34 43 319 discloses a metallized plastic film, those on their metallized surface with a sliding film is provided. This is intended to precede the metal layer Damage, e.g. B. by scratching, which in particular the gas tightness of the film is reduced, protected will.

The present invention is therefore based on the object a cigarette wrapper made of metallized paper To make available with no problems with the Exfoliation of metal particles during processing  occur that is very easy to machine is recycled and also high manufacturing and / or Avoiding material costs helps.

The above task is therefore solved by one Inside paper cigarette wrapper with one on it an amount of 0.02 to 0.25 g / m² applied Metal layer, which is characterized in that on the Metal layer a lubricant in an amount of 0.5 to 100 mg / m² is applied.

The term "lubricant" is known to those skilled in the art Name for a defined group of connections known, usually in the manufacture of plastics Find use. Lubricants are used as additives filled plastic masses, e.g. B. molding compounds and Spray material, added to make the fillers easier sliding and making the molding compounds easier to deform do. Part of the lubricant migrates as a result its insolubility in plastics to the surface and acts as a release agent there. With paints can Lubricant the friction between the pigment particles and Reduce unwanted sticking.

Surprisingly, it has now been found that a protective lacquer application is not necessary if a lubricant is the above designated type on the metallized surface of the Cigarette wrap is applied. In this way will come off, get stuck or without a protective lacquer Hooking metal particles to the embossing, folding and / or Deflection parts effectively prevented and abrasion avoided.

The most common lubricants include the following chemical classes: paraffins, polyethylene waxes, with Maleic anhydride modified polypropylene waxes, ester and acid waxes, amide waxes, polytetrafluoroethylene waxes, Polytetrafluoroethylene / polyethylene waxes, ethyl vinyl acetate  Copolymer waxes, natural waxes, fatty alcohols, fatty acids, Metal soaps, fatty acid esters, solid acid amides, siloxanes and sulfated oils. According to the invention, they can be used individually Compound or in mutually compatible mixtures be used. Most lubricants are commercially available available and can be processed directly without further processing be used.

If the lubricant is paraffin, it is preferred selected from predominantly branched chain liquid Hydrocarbons or predominantly straight-chain solid Hydrocarbons.

Polyethylene waxes as a lubricant are advantageous Polyethylenes with an average molecular weight of 2000 to 12000 or from air-oxidized low molecular weight Polyethylenes selected.

A preferred natural wax is carnauba wax.

Typical representatives of fatty acids as lubricants are Stearic acid, 12-hydroxystearic acid and montanic acids (Mixture of long-chain carboxylic acids with 26 to 33 Carbon atoms).

Metal soaps are also suitable as lubricants. Prefers calcium stearate, magnesium stearate and zinc stearate used.

Fatty acid esters as lubricants are preferably selected from Fatty acid esters of short-chain monohydric alcohols, Fatty acid esters of long-chain monohydric alcohols, glycol Fatty acid esters, glycerol fatty acid esters, montanic acid Ester waxes, solid or liquid high molecular weight Mixed esters or from esters of polybasic carboxylic acids. Typical representatives of this class of wiring are n-butyl stearate, stearyl stearate, propylene glycol monooleate,  Glycerol monooleate, glycerol monostearate, distearyl adipate, Distearyl phthalate, polycondensates Pentaerythritol + adipic acid + oleic acid or stearic acid, and Ester of montanic acids mixed with free montanic acids and calcium montanate.

A solid acid amide as a lubricant is advantageous Fatty acid amide selected from oleic acid amide, erucic acid amide or stearic acid amide, or N, N'-bis-stearoyl-ethylenediamine.

With the cigarette wrapping according to the present Invention is not a metal / paper composite, but the paper base was created by applying a thin metal layer metallized. Applying this Layer can be done according to methods known per se. Vacuum separation is common, Cathode spraying, plasma spraying, Vapor phase plating, electroless plating, Electroplating, evaporation or mounting. Of the metallic coating preferably consists of gold, silver, Copper, aluminum or mixtures or alloys of two or more of these metals. Particularly preferred Cover metal is aluminum.

Paper as the basis for the invention Packaging material will not have any special requirements especially regarding the thickness or quality. The term "paper" also includes cardboard or cardboard, each can be used after intended use. At Paper or card stock can be beneficial before application the metal layer the paper with a usual Primer varnish in an amount of 0.5 to 2.5 g / m² to treat.

The lubricant is applied in an amount by conventional methods from 0.5 to 100 mg / m² on the metallized paper base upset. In general, smaller amounts are sufficient  out. An application of 15 to 25 mg / m² has proven advantageous proven. The lubricant can be sprayed on or to be spread. The lubricant is preferred as an aqueous dispersion in a spreading operation on and then let dry.

Below is the structure of an inventive one Cigarette winder after a cigarette winder compared with the state of the art:

It has also been found that the lubricant film not only meets the same requirements as one Protective coating, but advantageously another better flatness of the material in the machine.

Add to that the elimination of organic solvents and because of the very small amount of lubricant environmentally friendly disposal or recycling possible is.

example To produce an inventive Cigarette wrapping is done as follows

First, a common primer is applied in an amount of 0.5 to 2.5 g / m² applied to the paper on which one Aluminum layer in an amount of 0.02 to 0.2 g / m² is evaporated. By spreading you bring on the Aluminum layer a dispersed in aqueous solution Polyethylene wax as a lubricant, so that after Dry the amount of lubricant applied 0.5 to Is 50 mg / m².

The manufactured with this structure according to the invention Inner cigarette winder is very easy to machine high abrasion resistance and can be in simple and be provided with the lubricant in a cost-effective manner.

Claims (14)

1. Cigarette inside wrapper made of paper, with a metal layer applied thereon in an amount of 0.02 to 0.25 g / m², characterized in that a lubricant is applied to the metal layer in an amount of 0.5 to 100 mg / m². 2. Internal cigarette wrapping according to claim 1, characterized characterized in that the lubricant is selected from Paraffins, polyethylene waxes, with maleic anhydride modified polypropylene waxes, ester and Acid waxes, amide waxes, polytetrafluoroethylene waxes, Polytetrafluoroethylene / polyethylene waxes, ethyl Vinyl acetate copolymer waxes, natural waxes, Fatty alcohols, fatty acids, metal soaps, fatty acid esters, solid acid amides, siloxanes, sulfated oils or mutually compatible mixtures thereof. 3. Internal cigarette wrapper according to claim 2, characterized characterized in that the lubricant is a paraffin, selected from predominantly branched chain liquid Hydrocarbons or predominantly straight-chain solid hydrocarbons. 4. Cigarette wrap according to claim 2, characterized characterized in that the lubricant is a polyethylene Wax selected from a medium polyethylene Molar mass from 2000 to 12000 or from air-oxidized low molecular weight polyethylene, or carnauba wax. 5. cigarette wrap according to claim 2, characterized characterized in that the lubricant is a fatty acid, selected from stearic acid, 12-hydroxystearic acid and Montanic acids.   6. Cigarette wrap according to claim 2, characterized characterized in that the lubricant is a metal soap, selected from calcium stearate, magnesium stearate and Zinc stearate. 7. cigarette wrap according to claim 2, characterized characterized in that the lubricant is a fatty acid ester is selected from short-chain fatty acid esters monohydric alcohols, long-chain fatty acid esters monohydric alcohols, glycol fatty acid esters, glycerin Fatty acid esters, montanic acid ester waxes, solid or liquid high molecular weight mixed esters or from esters polybasic carboxylic acids. 8. cigarette wrap according to claim 2, characterized characterized in that the lubricant is a solid acid amide is selected from fatty acid amides or N, N'-bis stearoyl-ethylenediamine. 9. cigarette wrap according to claim 1, characterized characterized in that the lubricant in an amount of 15 up to 25 mg / m² is applied. 10. Internal cigarette wrapper according to claim 1, characterized characterized in that the metal layer of gold, silver, Copper, aluminum or mixtures or alloys of two or more of these metals is formed. 11. cigarette wrapper according to claim 1, characterized characterized in that between the paper and the Metal layer also a primer in a lot from 0.5 to 2.5 g / m² is applied.   12. Process for making an internal cigarette wrapper according to claim 1 of paper with one thereon in one according to Amount of 0.02 to 0.25 g / m² applied metal layer, characterized in that one on the metal layer Lubricant in an amount of 0.5 to 100 mg / m² applies. 13. The method according to claim 12, characterized in that the lubricant as an aqueous dispersion in one Application or spray application. 14. The method according to claim 12, characterized in that first apply a primer varnish on paper from 0.5 to 2.5 g / m² on the primed paper an aluminum layer in an amount of 0.02 to Evaporates 0.25 g / m² and in on the aluminum layer aqueous solution dispersed polyethylene wax as Spreads lubricant, so that after drying the Amount of lubricant applied 0.5 to 100 mg / m² is.