FR2747957A1 - PROCESS FOR PRODUCING A STRUCTURED SHEET OF THERMOPLASTIC MATERIAL - Google Patents

PROCESS FOR PRODUCING A STRUCTURED SHEET OF THERMOPLASTIC MATERIAL Download PDF

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Publication number
FR2747957A1
FR2747957A1 FR9705022A FR9705022A FR2747957A1 FR 2747957 A1 FR2747957 A1 FR 2747957A1 FR 9705022 A FR9705022 A FR 9705022A FR 9705022 A FR9705022 A FR 9705022A FR 2747957 A1 FR2747957 A1 FR 2747957A1
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France
Prior art keywords
roller
structuring
strip
molten material
surface structure
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Granted
Application number
FR9705022A
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French (fr)
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FR2747957B1 (en
Inventor
Walter Kramer
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.)
Reifenhauser KG
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
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Reifenhauser KG
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
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Publication of FR2747957A1 publication Critical patent/FR2747957A1/en
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Classifications

    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/18—Thermoforming apparatus
    • B29C51/20—Thermoforming apparatus having movable moulds or mould parts
    • B29C51/22—Thermoforming apparatus having movable moulds or mould parts rotatable about an axis
    • 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
    • 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
    • B29C48/03—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
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
    • B29C48/9165—Electrostatic pinning
    • 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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
    • 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
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/0081—After-treatment of articles without altering their shape; Apparatus therefor using an electric field, e.g. for electrostatic charging
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Laminated Bodies (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

Procédé de fabrication d'une feuille structurée de matière thermoplastique, une bande de matière fondue étant produite à l'aide d'une extrudeuse et d'une filière plate et chargée à l'état plastique sur un rouleau de structuration entraîné en rotation qui présente par rapport à la structure de la feuille une structure de surface négative. Dans la région du transfert au rouleau de structuration (4), la bande de matière fondue (3) est chargée électrostatiquement à l'aide d'un dispositif de traitement par décharge en effluve (7). Par rapport au dispositif de traitement par décharge en effluve, le rouleau de structuration est monté comme contre-électrode. La formation et la reproduction de la structure négative (6) du rouleau de structuration dans la bande de matière fondue sont provoquées par des forces d'attraction électrostatiques. La feuille structurée positivement en fonction de la structure de surface négative du rouleau de structuration est formée par refroidissement sur le rouleau de structuration, puis retirée dudit rouleau.Method for manufacturing a structured sheet of thermoplastic material, a strip of molten material being produced using an extruder and a flat die and loaded in the plastic state on a structuring roller driven in rotation which has compared to the structure of the sheet a negative surface structure. In the region of transfer to the structuring roller (4), the strip of molten material (3) is electrostatically charged using a corona discharge treatment device (7). Compared with the effluvium discharge treatment device, the structuring roller is mounted as a counter-electrode. The formation and reproduction of the negative structure (6) of the structuring roll in the strip of molten material is caused by electrostatic attraction forces. The positively structured sheet as a function of the negative surface structure of the structuring roller is formed by cooling on the structuring roller, and then removed from said roller.

Description

PROCEDE DE FABRICATION D'UNE FEUILLE STRUCTUREE DEPROCESS FOR PRODUCING A STRUCTURED SHEET

MATIERE THERMOPLASTIQUETHERMOPLASTIC MATERIAL

L'invention concerne un procédé de fabrication d'une feuille structurée de matière thermoplastique, une bande de matière fondue vierge étant produite à l'aide d'une extrudeuse et d'une filière plate et chargée à l'état plastique sur un rouleau de structuration entraîne en rotation qui présente par rapport à la structure de la feuille une structure de surface négative laquelle se reproduit de manière positive et tridimensionnelle dans la structure de la feuille. - La bande de matière fondue présente déjà la forme d'une feuille, mais encore à l'état ressemblant dans une large mesure à la  The invention relates to a method for manufacturing a structured sheet of thermoplastic material, a strip of virgin molten material being produced using an extruder and a flat die and loaded in the plastic state on a roll of structuring results in rotation which presents with respect to the structure of the sheet a negative surface structure which reproduces positively and three-dimensionally in the structure of the sheet. - The strip of molten material already has the shape of a sheet, but still in a state resembling to a large extent the

matière en fusion.molten material.

Dans le procédé bien connu dans la pratique et qui constitue le point de départ de l'invention, le rouleau de structuration entraîne en rotation est un rouleau graineur dans une installation de calandrage. Il fait partie d'une paire de rouleaux dont le second rouleau agit comme rouleau conjugué sur le rouleau de structuration. Le rouleau conjugué porte un revêtement ou une enveloppe constitué d'un matériau à déformation élastique, par exemple de caoutchouc. Dans ce matériau à déformation élastique peut s'enfoncer la surface du rouleau de structuration. La bande de matière fondue est introduite sans aucun traitement préliminaire dans l'emprise entre le rouleau de structuration et le rouleau conjugué. Les structures du rouleau de structuration sont produites par empreinte mécanique. Les mesures bien connues sont compliquées. La feuille structurée peut subir des dommages mécaniques lors du processus d'empreinte, par exemple des fissures peuvent apparaître aux bords de la structure négative de la surface du rouleau de structuration. Il en est ainsi en particulier lorsque les mesures bien  In the process well known in practice and which constitutes the starting point of the invention, the structuring roller drives in rotation is a grain roller in a calendering installation. It is part of a pair of rollers, the second roller of which acts as a conjugate roller on the structuring roller. The conjugate roller carries a coating or an envelope made of an elastic deformation material, for example rubber. In this material with elastic deformation can sink the surface of the structuring roller. The strip of molten material is introduced without any preliminary treatment into the area between the structuring roll and the conjugate roll. The structures of the structuring roller are produced by mechanical impression. Well-known measures are complicated. The structured sheet may suffer mechanical damage during the impression process, for example cracks may appear at the edges of the negative structure of the surface of the structuring roller. This is particularly so when the measurements are well

connues sont effectuées avec un débit important.  known are performed with a large flow.

L'invention vise à réaliser d'une manière très simple une feuille structurée, et cela également avec un grand débit et en renonçant à une opération d'empreinte mécanique  The invention aims to achieve in a very simple way a structured sheet, and this also with a high throughput and by renouncing a mechanical impression operation.

susceptible de provoquer les inconvénients décrits ci-dessus.  likely to cause the disadvantages described above.

A cet effet, le procédé selon l'invention basé sur les mesures décrites plus haut est caractérisé en ce que, dans la région de transfert au rouleau de structuration, la surface de la bande de matière fondue détournée du rouleau est chargée électrostatiquement à l'aide d'un dispositif de traitement par décharge en effluve, que le rouleau de  To this end, the method according to the invention based on the measures described above is characterized in that, in the region of transfer to the structuring roller, the surface of the strip of molten material diverted from the roller is electrostatically charged with the using a corona discharge treatment device, that the

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structuration est monté par rapport au dispositif de traitement par décharge en effluve comme contre-électrode, que l'image positive de la structure de surface négative du rouleau de structuration est produite dans la bande de matière fondue par des forces d'attraction électrostatiques, et que la feuille structurée de manière positive en fonction de la structure de surface négative est formée sur le rouleau de structuration par refroidissement avant d'être retirée de celui-ci. Les forces d'attraction électrostatiques agissent entre la bande de matière fondue ayant subi le traitement par décharge en effluve, et le rouleau de structuration. Le rouleau de structuration peut être chargé  structuring is mounted relative to the corona discharge treatment device as counter electrode, that the positive image of the negative surface structure of the structuring roller is produced in the strip of molten material by electrostatic attraction forces, and that the positively structured sheet as a function of the negative surface structure is formed on the structuring roll by cooling before being removed therefrom. The electrostatic attraction forces act between the strip of molten material which has undergone the corona discharge treatment, and the structuring roller. The structuring roll can be loaded

négativement, mais il peut également être mis à la terre.  negatively, but it can also be grounded.

Le traitement par décharge en effluve de feuilles de matière plastique à l'état suffisamment plastique est en principe connu (EP 0 546 988 AI). Pour la réalisation de feuilles structurées à l'aide d'opérations d'empreinte mécaniques, ces mesures bien  In principle, the treatment by emitting a discharge of sheets of plastic material in a sufficiently plastic state is known (EP 0 546 988 AI). For the production of structured sheets using mechanical impression operations, these measures are

connues n'ont en rien contribué à la résolution du problème technique décrit au début.  known have in no way contributed to solving the technical problem described at the beginning.

Il existe dans le cadre de l'invention plusieurs possibilités pour la mise en oeuvre du procédé selon l'invention. Ainsi, la bande de matière fondue à structuration géométrique positive en fonction de la structure de surface négative du rouleau peut être refroidie en feuille structurée au moyen d'un gaz de refroidissement en circulation, à savoir sur le rouleau de structuration. Mais il est également concevable dans le cadre de  Within the framework of the invention, there are several possibilities for implementing the method according to the invention. Thus, the strip of melt with positive geometric structuring as a function of the negative surface structure of the roll can be cooled into a structured sheet by means of a circulating cooling gas, namely on the structuring roll. But it is also conceivable in the context of

l'invention de refroidir le rouleau de structuration.  the invention to cool the structuring roll.

L'invention part de la découverte que le traitement par décharge en effluve de la bande de matière fondue au cours de la réalisation d'une feuille structurée permet de supprimer l'empreinte mécanique avec ses contraintes mécaniques souvent à l'origine de défauts, en particulier avec des grandes vitesses de fabrication, et de la remplacer en quelque sorte par un moulage électrostatique doux de la bande de matière fondue dans la structure de surface négative du rouleau de structuration. Les inconvénients précités sont éliminés complètement, et on peut travailler à des vitesses de fabrication élevées. Le  The invention starts from the discovery that the treatment by discharging in effluvium the strip of molten material during the production of a structured sheet makes it possible to remove the mechanical imprint with its mechanical stresses often causing faults, especially with high manufacturing speeds, and to somehow replace it by a soft electrostatic molding of the strip of molten material in the negative surface structure of the structuring roller. The aforementioned drawbacks are eliminated completely, and it is possible to work at high manufacturing speeds. The

rouleau conjugué nécessaire dans le cadre des mesures bien connues est supprimé.  Conjugated roller necessary in the context of well-known measures is eliminated.

La description qui va suivre, en regard des dessins annexés à titre d'exemples non  The description which follows, with reference to the accompanying drawings by way of examples not

limitatifs, permettra de bien comprendre comment l'invention peut être mise en pratique.  limiting, will make it possible to understand clearly how the invention can be put into practice.

La figure 1 représente, schématiquement, une vue de côté d'une installation pour la mise en oeuvre du procédé selon l'invention, et  FIG. 1 represents, schematically, a side view of an installation for implementing the method according to the invention, and

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la figure 2 représente, à une échelle beaucoup plus grande, le détail A de l'objet  FIG. 2 represents, on a much larger scale, the detail A of the object

de la fig. 1.of fig. 1.

Dans la fig. 1, on reconnaît un dispositif pour la fabrication d'une feuille structurée 1 en matière thermoplastique. La matière thermoplastique est traitée dans une extrudeuse et entre dans l'outil monté en aval de l'extrudeuse. Il s'agit d'une filière plate 2 qui produit une bande de matière fondue 3 dont la largeur correspond assez exactement à la largeur de la feuille structurée 1 à réaliser Il ressort d'un examen des fig. 1 et 2 que la bande de matière fondue 3 est chargée à l'état plastique sur un rouleau de structuration 4 entraîne en rotation. Ce dernier présente une structure de surface 6 négative par rapport à la structure 5 de la feuille structurée 1 à réaliser. Dans la région du transfert au rouleau de structuration 4, la bande de matière fondue 3 est chargée électrostatiquement, sur sa surface détournée du rouleau 4, à l'aide d'un dispositif de traitement par décharge en effluve 7. Par rapport au dispositif de traitement par décharge en effluve 7, le rouleau de structuration 4 est monté comme contre- électrode. La reproduction de la structure de surface 6 négative du rouleau de structuration 4 dans la bande de matière fondue 3 est provoquée par des forces d'attraction électrostatiques. L'agencement est choisi de telle façon que la structure positive 5 de la feuille structurée 1 peut être formée par refroidissement sur le rouleau de structuration 4 en fonction de la structure de surface 6 négative du rouleau de structuration 4, puis retirée dudit rouleau. Le rouleau de structuration 4 peut par exemple être chargé négativement ou aussi mis à la terre. Par ailleurs, il est possible de  In fig. 1, there is a device for manufacturing a structured sheet 1 of thermoplastic material. The thermoplastic material is treated in an extruder and enters the tool mounted downstream of the extruder. It is a flat die 2 which produces a strip of melt 3 whose width corresponds fairly exactly to the width of the structured sheet 1 to be produced. It appears from an examination of FIGS. 1 and 2 that the strip of molten material 3 is loaded in the plastic state on a structuring roller 4 drives in rotation. The latter has a negative surface structure 6 with respect to the structure 5 of the structured sheet 1 to be produced. In the region of transfer to the structuring roller 4, the strip of molten material 3 is electrostatically charged, on its surface diverted from the roller 4, using a device for treatment by emanation of emanation 7. With respect to the device for treatment by corona discharge 7, the structuring roller 4 is mounted as a counter electrode. The reproduction of the negative surface structure 6 of the structuring roller 4 in the strip of molten material 3 is caused by electrostatic attraction forces. The arrangement is chosen so that the positive structure 5 of the structured sheet 1 can be formed by cooling on the structuring roller 4 as a function of the negative surface structure 6 of the structuring roller 4, then removed from said roller. The structuring roller 4 can for example be negatively charged or also grounded. In addition, it is possible to

mettre en oeuvre les mesures de refroidissement déjà décrites.  implement the cooling measures already described.

4 27479574 2747957

Claims (5)

REVENDICATIONS 1. - Procédé de fabrication d'une feuille structurée de matière thermoplastique, une bande de matière fondue vierge étant produite à l'aide d'une extrudeuse et d'une filière plate et chargée à l'état plastique sur un rouleau de structuration entraîné en rotation qui présente par rapport à la structure de la feuille une structure de surface négative, c a r a c t é r i s é e n c e que dans la région du transfert au rouleau de structuration (4), la bande de matière fondue (3) est chargée électrostatiquement, sur sa surface détournée du rouleau de structuration, à l'aide d'un dispositif de traitement par décharge en effluve (7), que par rapport au dispositif de traitement par décharge en effluve, le rouleau de structuration est monté comme contre-électrode, que la reproduction positive de la structure de surface (6), négative du rouleau de structuration dans la bande de matière fondue est provoquée par des forces d'attraction électrostatiques, et que la feuille structurée positivement (5) en fonction de la structure de surface négative est formée par refroidissement sur le rouleau de structuration, puis  1. - Method for manufacturing a structured sheet of thermoplastic material, a strip of virgin molten material being produced using an extruder and a flat die and loaded in the plastic state on a driven structuring roller in rotation which has a negative surface structure relative to the structure of the sheet, characteristic that in the region of transfer to the structuring roller (4), the strip of molten material (3) is electrostatically charged, on its surface diverted from the structuring roller, using a corona discharge treatment device (7), that with respect to the corona discharge treatment device, the structuring roller is mounted as a counter electrode, the positive reproduction of the surface structure (6), the negative of the structuring roller in the strip of molten material is caused by electrostatic forces of attraction, and that fire ille positively structured (5) according to the negative surface structure is formed by cooling on the structuring roller, then retirée dudit rouleau.removed from said roller. 2. - Procédé selon la revendication 1, caractérisé en ce que le rouleau de  2. - Method according to claim 1, characterized in that the roller structuration (4) est chargé négativement.  structuring (4) is negatively charged. 3. - Procédé selon la revendication 1, caractérisé en ce que le rouleau de  3. - Method according to claim 1, characterized in that the roller 2 0 structuration (4) réalisé en métal est mis à la terre.  2 0 structuring (4) made of metal is earthed. 4. - Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la bande  4. - Method according to one of claims 1 to 3, characterized in that the strip de matière fondue structurée positivement en fonction de la structure de surface négative du rouleau de structuration (4) est refroidie par un gaz de refroidissement en circulation  of positively structured melt as a function of the negative surface structure of the structuring roller (4) is cooled by a circulating cooling gas de façon à former la feuille structuree.  so as to form the structured sheet. 5. - Procédé selon l'une des revendications 1 à 4, caractérisé en ce que le rouleau  5. - Method according to one of claims 1 to 4, characterized in that the roller de structuration (4) est refroidi.structure (4) is cooled.
FR9705022A 1996-04-24 1997-04-23 PROCESS FOR PRODUCING A STRUCTURED SHEET OF THERMOPLASTIC MATERIAL Expired - Fee Related FR2747957B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19616331A DE19616331C1 (en) 1996-04-24 1996-04-24 Process for producing a structural film from thermoplastic

Publications (2)

Publication Number Publication Date
FR2747957A1 true FR2747957A1 (en) 1997-10-31
FR2747957B1 FR2747957B1 (en) 2000-03-24

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JP (1) JPH1052853A (en)
DE (1) DE19616331C1 (en)
FR (1) FR2747957B1 (en)
GB (1) GB2312396B (en)
IT (1) IT1291635B1 (en)

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CN114290587A (en) * 2021-12-31 2022-04-08 安徽铜峰电子股份有限公司 Electrostatic adsorption device for polyolefin film

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19850832C5 (en) * 1998-11-04 2005-10-06 Singulus Technologies Ag Method for connecting substrate halves of optical data carriers
JP6579783B2 (en) * 2015-04-10 2019-09-25 株式会社ディスコ Manufacturing method of bellows
DE102022109727A1 (en) 2022-04-22 2023-10-26 polyscale GmbH & Co. KG Method for generating a functional structure on a surface of a functional body

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GB1302642A (en) * 1970-01-26 1973-01-10
EP0092445A2 (en) * 1982-04-21 1983-10-26 Teijin Limited Process for preparing cast film of thermoplastic resin
EP0168617A2 (en) * 1984-07-19 1986-01-22 Hallmark Cards, Incorporated Replication of surface characteristics
DE3735001A1 (en) * 1987-10-16 1989-04-27 Reifenhaeuser Masch DEVICE FOR THE ELECTROSTATIC FIXING OF A MELT FLAG OF THERMOPLASTIC PLASTIC ON A COOLING ROLLER
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JPH1052853A (en) 1998-02-24
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IT1291635B1 (en) 1999-01-19
ITMI970941A0 (en) 1997-04-22
FR2747957B1 (en) 2000-03-24
GB2312396B (en) 1999-08-11
GB2312396A (en) 1997-10-29

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