EP2032356A2 - Procédé de fabrication de couches minces de silicone et silicone mince - Google Patents

Procédé de fabrication de couches minces de silicone et silicone mince

Info

Publication number
EP2032356A2
EP2032356A2 EP07765476A EP07765476A EP2032356A2 EP 2032356 A2 EP2032356 A2 EP 2032356A2 EP 07765476 A EP07765476 A EP 07765476A EP 07765476 A EP07765476 A EP 07765476A EP 2032356 A2 EP2032356 A2 EP 2032356A2
Authority
EP
European Patent Office
Prior art keywords
silicone
layer
thin
cover layer
extruded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07765476A
Other languages
German (de)
English (en)
Inventor
Kurt Stark
Werner Schmidt
Walter Günter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huhtamaki Forchheim Zweigniederlassung der Hutamaki Flexible Packaging Germany GmbH and Co KG
Original Assignee
Huhtamaki Forchheim Zweigniederlassung der Hutamaki Deutschland GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huhtamaki Forchheim Zweigniederlassung der Hutamaki Deutschland GmbH and Co KG filed Critical Huhtamaki Forchheim Zweigniederlassung der Hutamaki Deutschland GmbH and Co KG
Publication of EP2032356A2 publication Critical patent/EP2032356A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0013—Extrusion moulding in several steps, i.e. components merging outside the die
    • B29C48/0014—Extrusion moulding in several steps, i.e. components merging outside the die producing flat articles having components brought in contact outside the extrusion die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • B29C48/307—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets specially adapted for bringing together components, e.g. melts within the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/20—Layered products comprising a layer of natural or synthetic rubber comprising silicone rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/40—Adhesives in the form of films or foils characterised by release liners
    • C09J7/401—Adhesives in the form of films or foils characterised by release liners characterised by the release coating composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • B32B2038/0028—Stretching, elongating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/10—Fibres of continuous length
    • B32B2305/20—Fibres of continuous length in the form of a non-woven mat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/08—Dimensions, e.g. volume
    • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
    • B32B2309/105—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/12—Deep-drawing
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2483/00—Presence of polysiloxane
    • C09J2483/005—Presence of polysiloxane in the release coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/266—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension of base or substrate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31652—Of asbestos
    • Y10T428/31667—Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2025—Coating produced by extrusion

Definitions

  • the invention relates to a method for producing thin layers of a plastically processable silicone and the thin silicone layer produced by this method.
  • the object of the invention is to propose a method for producing thin layers of a silicone, which can be carried out in a single and simple operation and in which the silicone layers produced firmly and securely adhere to the respective carriers.
  • the carrier layer is fed to the silicone layer after extrusion.
  • Another very advantageous embodiment of the invention is also present when the silicone layer is covered by a cover layer.
  • the cover layer protects the silicone layer from damage.
  • the cover layer is produced in a single work step together with the silicone layer.
  • Another very advantageous embodiment of the invention is also the fact that between the carrier layer and silicone layer, a bonding agent is introduced.
  • the bonding agent is extruded together with the silicone layer. It is also extremely advantageous if the bonding agent is extruded together with the cover layer.
  • Another very advantageous embodiment is also present when the bonding agent is applied to the already extruded silicone layer.
  • adhesion promoter is applied to the already extruded cover layer or the carrier layer.
  • Another very advantageous embodiment of the invention is also that a provided between silicone layer and backing layer and / or cover layer adhesion promoter is coextruded together with other layers.
  • any bursting or cracking of the silicone layer during the stretching process is thereby effectively avoided.
  • the silicone layer is protected even after the stretching process. According to the invention, it has also proven to be very advantageous if at least the carrier layer and / or the cover layer is removed after the extrusion and / or after the stretching.
  • the finished silicone layer is wound up.
  • the finished silicone layer can be stored and transported very easily.
  • thermoplastically processable with conventional methods silicone in particular a silicone organic copolymer or a silicone elastomer or the like is provided.
  • thermoplastically processable silicone can be extruded particularly well.
  • a fleece, a non-woven, a woven material, in particular a textile layer, or a paper or the like is provided as the carrier layer.
  • thermoplastic material is provided as the carrier layer and / or cover layer, in particular as a cover layer, a thermoplastic plastic film.
  • thermoplastic material it is likewise very advantageous if polyethylene, in particular LDPE or LLDPE, is provided as the thermoplastic material.
  • thermoplastic material is polypropylene, in particular polypropylene homopolymers and polypropylene copolymers.
  • thermoplastic materials are particularly suitable as backing layer and / or cover layer.
  • the adhesion promoter used is ethylene-acrylate copolymers, ethylene-vinyl acetate copolymers, acid copolymers, polymers with acid anhydride functions, in particular unsaturated acid anhydrides, especially polyethylene and polypropylene provided with maleic anhydride, ionomers, polymers with hydroxyl groups, in particular polyvinyl alcohols or ethylene-containing polyvinyl alcohols (EVOH), copolymers of organic monomers with hydroxyl-containing monomers, in particular hydroxyethyl acrylate or hydroxypropyl acrylate, or with functional monomers grafted unfunctional polymers, in particular with OH-functional monomers grafted polymers are used.
  • EVOH ethylene-containing polyvinyl alcohols
  • the adhesion promoters consist of blends or batches which are at least partially ethylene-acrylate copolymers, ethylene-vinyl acetate copolymers, acid copolymers, polymers with acid anhydride.
  • functions, in particular provided with acid anhydrides polyethylene and polypropylene, ionomers, polymers having hydroxyl groups, in particular polyvinyl alcohols or ethylene-containing polyvinyl alcohols (EVOH), copolymers of organic monomers with hydroxyl-containing monomers, in particular hydroxyethyl acrylate or hydroxypropyl acrylate, and / or with functional monomers grafted unfunctional polymers, in particular with OH-functional monomers contain grafted polymers.
  • ethylene vinyl acetate copolymers are provided as adhesion promoters, the copolymer proportions preferably being greater than 5%.
  • adhesion promoters allow the cohesion between the silicone layer and the other layers to be set within wide limits.
  • the carrier layer before stretching has a thickness between 0.1 and 3000 ⁇ m, in particular between 1 and 500 ⁇ m, preferably between 10 and 200 ⁇ m.
  • the cover layer before stretching has a thickness between 0.1 and 3000 ⁇ m, in particular between 1 and 500 ⁇ m, preferably between 10 and 200 ⁇ m.
  • thermoplastically processable silicone has a thickness of 0.1 to 3000 ⁇ m, in particular between 1 and 70, in particular between 1 and 30 ⁇ m, very particularly between 2 and 20 ⁇ m.
  • thermoplastically processable silicone has a proportion of a silicone component which is between 0, 1 and 99.9% and which is preferably greater than 90%.
  • the silicone component is essentially responsible for the release properties of the thermoplastically processable silicone. The large proportion of the silicone component ensures good release properties.
  • thermoplastically processable silicone has a proportion of a silicone component which is between 0.1 and 99.9% and which is preferably ⁇ 60%.
  • thermoplastically processable silicone has a release force against adhesives, in particular against pressure-sensitive adhesives, between 1 and 700 cN / cm, preferably between 2 and 100 cN / cm.
  • thermoplastically processable silicone as a release material.
  • melt-processable silicone has a melt viscosity of between 1 and 1,000,000, in particular between 35,000 and 45,000 Pas.
  • thermoplastically processable silicone can be extruded very well.
  • melt viscosity at 18O 0 C is measured. According to the invention, it has proven to be extremely advantageous if the melt viscosity at 18O 0 C is between 1 and 1000 Pas.
  • the silicone can very easily be applied as a hotmelt coating to a substrate.
  • melt viscosity at 18O 0 C is greater than 1000 Pas.
  • silicone compound or the silicone is present in such high viscosities, this can be extrusion coating particularly well.
  • thermoplastically processable silicone has a Shore hardness between 10 and 100, in particular between 50 and 60.
  • thermoplastically processable silicone ⁇ 50%, preferably ⁇ 30%, in particular ⁇ 10%.
  • the adhesive force of a pressure-sensitive adhesive during storage is influenced as little as possible.
  • the thickness of the thermoplastically processable silicone layer after stretching is between 0.1 and 400 ⁇ m, in particular between 0.1 and 50 ⁇ m, preferably between 1 and 5 ⁇ m.
  • Showing: 1 shows a two-layered coextrudate according to the invention, which is connected to a nonwoven carrier layer,
  • FIG. 2 shows a four-layer coextrudate according to the invention, which is connected to a paper carrier layer
  • Fig. 3 shows a package which is formed from a coextrudate according to the invention.
  • a two-layer coextrudate 1 is extruded from a die.
  • This coextrudate 1 consists of a cover layer 2 of a thermoplastic material, a subsequent silicone layer 3 of a thermoplastically processable silicone.
  • a total composite 5 is created by feeding a carrier layer 4 of a nonwoven, which is also made of a thermoplastic material and which follows the silicone.
  • the thermoplastic material may be a polyethylene, e.g. an LDPE or an LLDPE, a polypropylene or the like, or a blend of various materials.
  • the composite After the extrusion and / or after the joining of the overall composite 5, the composite can be stretched in the longitudinal and / or transverse direction, which on the one hand improves the strength properties of the individual layers and, on the other hand, reduces the layer thicknesses.
  • the cover layer 2 may have a thickness between 1 and 500 ⁇ m.
  • the silicone layer 3 may have a thickness in the range between 5 and 30 microns. By stretching, these thicknesses are significantly reduced, whereby silicon layers 3 in a thickness of up to 0.1 microns or less can be achieved.
  • the silicone layer 3 is stabilized during the stretching process by the carrier layer 4 and the cover layer 2. In particular, it is prevented that the silicone layer 3 forms cracks or tears completely apart.
  • the cover layer 2 or also the carrier layer 4 can be removed.
  • the carrier layer 4 is made of a different material, such as a textile, a paper or even a metal, for example. It is also conceivable that the carrier layer 4 is formed for example of glass or Kevlar fibers.
  • the silicone layer 3 can be extruded together with the cover layer 2 on this support layer or is subsequently applied by lamination.
  • Adhesion promoter 6 the adhesion between the individual layers can be adjusted within wide ranges.
  • Adhesion promoters are, in particular, ethylene acrylate copolymers, ethylene vinyl acetate, acid copolymers, polymers with acid anhydride functions, in particular acid-anhydride-provided polyethylene and polypropylene, ionomers, polymers with hydroxyl groups, in particular polyvinyl alcohols or ethylene-containing polyvinyl alcohols (EVOH), copolymers of organic monomers with hydroxyl-containing monomers , in particular hydroxyethyl acrylate or hydroxypropyl acrylate, or with functional monomers grafted unfunctional polymers, in particular with OH-functional monomers grafted polymers or the like, as well as blends of these substances with other substances.
  • the adhesion promoter 6 can either together with the cover layer. 2 or the silicone layer 3 are coextruded. A subsequent application of the adhesion promoter layers 6 is conceivable.
  • a 16g of a / m 2 PP nonwoven existing carrier layer 4 is a 4 microns adhesive layer 6 and a 4 .mu.m silicone layer 3 is extruded.
  • the cover layer 2 is provided as a feed path and fed directly after the extrusion or laminated later.
  • Such a composite is particularly suitable for the production of packaging to be filled with sticky or adhesive substances.
  • the overall composite 5 is used as wrapping packaging for blocks or the like of, for example, pressure-sensitive adhesives.
  • the overall composite 5 is used for packaging hygiene articles or other at least partially tacky or adhering objects or substances.
  • the overall composite 5 can also be used for lining containers or outer packaging.
  • the carrier layer 4 it is conceivable with appropriate selection of the carrier layer 4 that the overall composite 5 is also deep-drawn.
  • thermoforming or packaging process it is also conceivable that only a part of the overall composite 5 is used for the thermoforming or packaging process.
  • the cover layer 2 of the coextrudate 1 may have been stripped off before the remainder of the overall composite 5 is applied, for example, to a thick-layer film of polypropylene. Subsequently, this thick film is deep-drawn together with the silicone layer 3. The remaining cover layer 2 prevents it as well as when stretching an unwanted bursting of the silicone layer 3. After the Deep-drawing process or just before filling the container with the goods to be packaged, the remaining carrier layer 4 can then additionally be removed. During transportation of the container damage to the silicone layer 3 are prevented.
  • the total composite 5 is also used for other purposes.
  • the overall composite 5 can be the basis for the production of labels, hygiene packs, environmental protective films, peelable protective films, window interlayers for safety glass, window panes or the like. Additional layers required for these applications are either supplied subsequently to the overall composite 5 or are extruded together with the coextrudate 1 layers.
  • the cover layer 2 is provided with a filler such as chalk.
  • a blown coextrudate 1 with a thickness of the cover layer 2 between 100 and 300 .mu.m, a bonding layer with a thickness between 10 and 20 .mu.m and an extruded silicone layer 3 with a thickness between 8 and 15 .mu.m is stretched, that the thickness of the cover layer 2 after stretching is between 30 and 70 microns.
  • the silicone layer 3 is reduced to a thickness of up to 0.1 microns.
  • the rigidity and strength of the composite 5 is considerably increased.
  • a package 7 is indicated for a sanitary napkin, not shown, which is made of the composite according to the invention.
  • the composite according to the invention for the production, covering or lining of an article provided with a silicone layer, in particular a packaging or a container is used, which is then prepared, for example, for receiving pressure-sensitive adhesives.
  • the carrier or cover layer facing away from the base material and then deep-drawn together with the base material to form a container.
  • the composite of support layer, silicone layer and cover layer can also be applied together to a base material and then deep-drawn together with the base material to a container.
  • the carrier layer or the cover layer can be removed after completion of the container.
  • connection of the silicone layer to the carrier layer prevents tearing of the silicone layer during deep drawing or stretching. This effect is reinforced by the cover layer.
  • the cover prevents any damage to the silicone layer during manufacture or during transport of an unfilled container made therefrom.
  • the silicone layer according to the invention and also the composite according to the invention can form a highly transparent, preferably weather-stable protective layer for an article.
  • the silicone layer or the composite can be a dirt-repellent protective layer for the object, whereby an object or the like can be protected from many environmental influences.
  • the silicone layer or the composite is used as a protective layer for particularly smooth surfaces.
  • the silicone layer or the composite can be held on particularly smooth surfaces by adhesion, whereby applications of the silicone layer or the composite as peelable and / or interchangeable protective layers are possible.
  • the silicone layer is used as a release layer to any fabrics, which, for example, applications of Silicone layer or the composite possibly in conjunction with other layers are conceivable, which have a separation of several layers of an object to the task.
  • the silicone layer or the composite is used in a variety of embodiments in hygiene applications, in particular in hygienic packaging or the like, whereby a very simple and cost-effective production of such packaging or the like is possible.
  • the silicone layer or the composite is used as an intermediate layer between a plurality of layers of a window, which can be produced among other security slices with an intermediate layer with the silicone layer according to the invention or the composite in a variety of characteristics for a variety of requirements.
  • the silicone layer or the composite can be connected to further layers and together with these layers form a window pane or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Silicon Compounds (AREA)

Abstract

L'invention concerne un procédé de fabrication de couches minces (3) d'un silicone pouvant être traité de façon plastique, la couche de silicone (3) étant extrudée. L'invention concerne également la couche mince de silicone (3) fabriquée selon ledit procédé.
EP07765476A 2006-06-21 2007-06-18 Procédé de fabrication de couches minces de silicone et silicone mince Withdrawn EP2032356A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610028901 DE102006028901A1 (de) 2006-06-21 2006-06-21 Verfahren zur Herstellung dünner Schichten eines Silikons und dünnes Silikon
PCT/EP2007/056040 WO2007147811A2 (fr) 2006-06-21 2007-06-18 Procédé de fabrication de couches minces de silicone et silicone mince

Publications (1)

Publication Number Publication Date
EP2032356A2 true EP2032356A2 (fr) 2009-03-11

Family

ID=38720695

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07765476A Withdrawn EP2032356A2 (fr) 2006-06-21 2007-06-18 Procédé de fabrication de couches minces de silicone et silicone mince

Country Status (6)

Country Link
US (1) US20100178824A1 (fr)
EP (1) EP2032356A2 (fr)
CN (1) CN101484312A (fr)
BR (1) BRPI0713491A2 (fr)
DE (1) DE102006028901A1 (fr)
WO (1) WO2007147811A2 (fr)

Families Citing this family (5)

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DE102008046234A1 (de) 2008-02-14 2009-08-27 Pinselwurm Stefan Winkler E. K. Flachdach-Abdichtung und Herstellung einer Silikonfolie dafür
EP2256173B1 (fr) 2009-05-28 2015-08-05 The Procter and Gamble Company Matériau de feuille de décollement
DE102012222992A1 (de) 2012-12-12 2014-06-12 Wacker Chemie Ag Herstellung dünner Siliconfolien
US9539797B2 (en) 2013-11-14 2017-01-10 Rayven, Inc. Traverse wound double-sided pressure sensitive adhesive tape
DE102013113532A1 (de) * 2013-12-05 2015-06-11 Huhtamaki Films Germany Gmbh & Co. Kg Vorläuferverbundmaterial, Verbundmaterial, Verfahren zur Herstellung eines Vorläuferverbundmaterials, Verfahren zur Herstellung eines Verbundmaterials und Verwendung eines Vorläuferverbundmaterials und eines Verbundmaterials

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DE102004057382A1 (de) * 2004-11-26 2006-06-01 Huhtamaki Forchheim Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg Verfahren zur Herstellung dünner Schichten eines Silikons, dünnes Silikon und Verwendung

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US20100178824A1 (en) 2010-07-15
DE102006028901A1 (de) 2007-12-27
BRPI0713491A2 (pt) 2012-01-24
WO2007147811A3 (fr) 2008-02-28
WO2007147811A2 (fr) 2007-12-27
WO2007147811A8 (fr) 2009-03-12
CN101484312A (zh) 2009-07-15

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