DE2537074A1 - METALIZATION METHOD OF A CARRIER, IN PARTICULAR A THIN FILM - Google Patents

Description

21,310

ATO-EMBALLAGE, Poly-Paper Division

60301 SENLIS, Avilly Saint-Leonard / France

"Process for the metallization of a carrier,
especially a thin film "

The invention relates to a metallization process one

dear carrier, preferably in the form of a thin film. '

Numerous processes for metallizing substrates are known ^: either by direct application or by trans-;

fer go out. In particular, paper, cardboard, film, woven and non-woven textiles, metal foils are used under thin foil

. stood. ^!

The methods known to date have either wholly or partially

i

. se have the following disadvantages; !

- They are not on certain materials that form the carrier | applicable,

- the ability to adhere is variable and to a certain extent depending on the wearer Cases it is relatively small,

j - the external appearance depends on the surface condition of the underlying carrier and accordingly it often leaves wishes
^: see openly,

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ORIGINAL INSPECTED

- Even if the carrier is elastic in itself, it comes to Breaks in the metal cladding along the fold lines,

- In the case of the application of the metallization by transfer, the primary carrier can often no longer be used.

The method according to the invention aims to remedy these disadvantages to eliminate and accordingly proposes a metallization process for any carrier, preferably in the form of a thin one Foil, such as paper, cardboard, film, woven and non-woven textiles, metal foil, characterized in that it comprises the following successive operations: simultaneous feeding into an extrusion and rolling machine known per se Type of first tape in the form of a semi-finished product consisting of a plastic thin film that is placed under vacuum is metallized on at least one of its surface and a second band consisting of said substrate to be metallized consists, at the same time to the said input between the said two bands and in a flat nozzle from a film a thermoplastic resin of the family of polyolefins or their derivatives is extruded, rolling in said machine the composition formed by the two said tapes or the said extruded film enclosed by them will; Severing by progressively peeling the film from said first tape, exposing the metallized portion which is then transferred to one of the faces of the extruded film to which it remains firmly attached, the film is firmly connected with its other surface with said carrier.

Polyethylene, polypropylene, their copolymers and their copolymers are preferably used, in particular, as polyolefins and their derivatives Ionomers.

It has to be the combination of unexpected and surprising effects are underlined, which thanks to the inventive method

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driving is achieved. As a matter of fact:

- in spite of good adhesion of the metallization layer to the primary carrier (furthermore nothing has been done to prevent this To limit adhesion) there is a complete and irreversible transfer of the metal layer to the free surface of the said extruded film, which leads to a very strong adhesion of this layer on the said free side,

j - the primary carrier can be removed immediately or later by peeling off can be taken, whereby this operation enables a complete re-use.

; Finally, it should be noted that the extruded : Film adheres very well to the substrate to be metallized.

• The method according to the invention has on the one hand attached to this contribute that the metal cladding can be made transferable, which lies on the primary carrier and on the other hand to the To improve the adhesion qualities of this cladding on the new carrier.

According to one feature of the invention, said extrusion takes place Films at a temperature between 100 and 350 °.

Further features and advantages that are essential to the invention emerge from the following description in which, with reference to FIG the following drawing exemplary embodiments are explained.

The extruding and rolling group of a type known per se essentially comprises a roller train 1 and an extruding machine 2 on, which gives off the rolling cylinder 3 and 4 above the contact involute.

The carrier A to be metallized unwinds from an input

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j reel 5 while the metallized plastic film B is off the reel 6 is delivered. The extrusion machine 2 has a not shown

set up flat drawing nozzle and gives a film C in the direction of the arrow F. The three components A, B, C run simultaneously between the cylinders 3 and 4 of the rolling device 1, wherein the roller 3 is the pressure roller and the other with the reference numeral 4 is a machined surface, for example a machined

; chrome surface.

At the exit of the rolling device, the substrate A is successively provided on one of its surfaces with the film C and the substrate A, which adheres to the film C with its metallized surface; this together \ quantitative sat carrier D is ί driving on a take-up reel 8 for an immediate or delayed separation according to a known encryption recorded with means known per se. j

Some exemplary embodiments are given below.

example 1

Carrier A consists of newsprint of 56g / m2; the extru-. Dourable resin is released in the form of a film of 20 g / m2 and j granules of a commercially available product with the names: Surlyn are used, manufacturer Dupon de Nemours. As a metallized Carrier B is a 56g / m2 polyvinyl chloride film metallized under vacuum.

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settings

Extrusion machine body (zone control): 40 °, 100 °, 150 °, 200 ° C Speed: 150 m / minute
Pull nozzle: 350 °
Laize: 1,150 mm

Example 2

Carrier A: non-woven fabrics 60 g / m2

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FiIm C
^; Carrier B

j Example 3

Carrier A
, Film C

• Carrier B

\ Example 4

Carrier A
Movie C
Carrier B

: Polyethylene 2Og / m2

: Polyvinyl chloride 20/1000

Polyamide film 2Og / m2
Acetate copolymer 20g / m2
Polyvinyl chloride 20/1000

peeled paper 4Og / m2
Polyethylene 2Og / m2
Polyvinyl chloride 20/1000

Tests carried out on the above exemplary embodiments show! that the affinity of the metallization given off by the primary carrier ^ for the extruded resin film apparently by the presence of metal deposits arises, which on the base copolymer,;

attached to acrylic acid. j

_! Of course, the invention is not limited to the described! bene and shown embodiment, but includes all Ausj management variants.

Patent claims :

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Claims (4)

"~ 6 - Claims ι (1. Metallization process for any carrier, preferably for thin foils, such as paper, cardboard, film, woven and non-woven textiles, metal foil, characterized in that it has the following successive operations: simultaneous input into an extrusion and rolling machine, known per se, of a first strip in the form of a semi-finished product consisting of a plastic thin film metallized under vacuum on at least one of its surfaces and a second strip consisting of the said support to be metallized, wherein to said input between said two tapes and in a flat die a film of a thermoplastic resin of the family of Polyolelfine or their derivatives! is extruded at the same time, rollers or in said machine the bands referred to by both the cooperation 'setting, the said extruded film enclosed by them is formed; separation d by progressively peeling off the film from the aforesaid first tape, exposing the metallized part, the j is then transferred to one of the faces of the extruded film, ; with which it remains firmly connected, the film with its other Surface is firmly connected to said carrier. 2. The method according to claim 1, characterized in that in the family of polyolelfins or their derivatives, in particular of polyethylene and polypropylene, their copolymers and their ionomers are used. 3. The method according to claim 1 to 2, characterized in that the extrusion of said film at a temperature takes place between 100 and 350 °. 4. The method according to claim 1 to 3, characterized in 7OSÖ09 / O912 net that the passing on both directly and later with in itself known means can be done. 709809/0912 Blank page