CH421489A - A method of manufacturing an article composed of at least two layers of superimposed sheets of thermoplastic anisolvape material - Google Patents
A method of manufacturing an article composed of at least two layers of superimposed sheets of thermoplastic anisolvape materialInfo
- Publication number
- CH421489A CH421489A CH668864A CH668864A CH421489A CH 421489 A CH421489 A CH 421489A CH 668864 A CH668864 A CH 668864A CH 668864 A CH668864 A CH 668864A CH 421489 A CH421489 A CH 421489A
- Authority
- CH
- Switzerland
- Prior art keywords
- holes
- sheets
- layers
- thermoplastic material
- thermoplastic
- Prior art date
Links
Classifications
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/304—Joining through openings in an intermediate part of the article
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- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
- B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/45—Joining of substantially the whole surface of the articles
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
- B29C66/7371—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
- B29C66/7371—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
- B29C66/73711—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable oriented
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
- B29C66/7371—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
- B29C66/73711—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable oriented
- B29C66/73712—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable oriented mono-axially
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
- B29C66/7371—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
- B29C66/73711—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable oriented
- B29C66/73713—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable oriented bi-axially or multi-axially
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- 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
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- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
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- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
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- 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
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
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- 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
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
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- 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
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
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- 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
- B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
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- 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/005—Oriented
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- 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/005—Oriented
- B29K2995/0053—Oriented bi-axially
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7128—Bags, sacks, sachets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
Procédé de fabrication d'un article composé d'au moins deux couches de feuilles
de matière thermoplastique anisolvape superposées
La présente invention a pour but un procédé de fabrication d'un article composé d'au moins deux couches de feuilles de matière thermoplastique anisotrope superposées.
On sait que, par opposition aux autres feuilles en matière plastique, les feuilles formées de deux couches anisotropes superposées de façon que les directions d'orientation forment un angle, par exemple de 90 ", présentent une plus grande résistance initiale aux déchirures et à une continuation de déchirures déjà amorcées. On a donc proposé d'utiliser de telles matières pour fabriquer des sacs, des cornets et d'autres articles d'emballage pour transporter des objets lourds.
Cependant, les feuilles formées de pellicules superposées transversalement n'ont pas été utilisées jusqu'à présent pour fabriquer de tels articles d'emballage, car les procédés connus de soudure, même celui aux ultra-sons, ne permettaient pas d'obtenir un assemblage résistant, étant donné que l'anisotropie était détruite par la fusion de la matière lors de la soudure.
Les expériences faites ont prouvé que la soudure ne donne satisfaction que si une feuille fondant difficilement est insérée entre les deux surfaces à réunir et que l'intensité du chauffage est très exactement réglée pour éviter un retrait. Avec de telles précautions, la soudure devient trop compliquée pour êre exploitable industriellement avec avantage.
On a aussi suggéré d'utiliser des adhésifs. Avec ces derniers, une résistance suffisante ne peut être obtenue qu'en employant des adhésifs spéciaux qui, pendant la pose, doivent être durcis à une température proche de celle du point de fusion de la matière polymère orientée pour obtenir une adhésion adéquate et éviter que les adhésifs ne coulent à froid pendant l'usage. Les difficultés rencontrées pour régler le chauffage et pour éviter le retrait des feuilles font que ces procédés sont inutilisables en pratique.
Enfin, on sait que pour augmenter la résistance aux déchirures déjà amorcées de feuilles anisotropes superposées, on obtient de meilleurs résultats en les cousant plutôt que d'utiliser d'autres feuilles pour parer au déchirement.
Les feuilles anisotropes ressemblent aux matières textiles pour autant que les molécules à chaîne longue sont alignées parallèlement les unes aux autres et sont assemblées, lors de la cristallisation, sous forme de fils qui apparaissent au microscope.
D'autre part, les propriétés de ces feuilles sont si différentes de celles des matières textiles tissées, que seul un gros fil peut être utilisé pour faire les coutures ; même les trous produits par la couture s'élargissent lorsque cette dernière est soumise à une traction, avant que la déchirure ne s'arrête.
La présente invention a pour but de remédier aux inconvénients précités et le procédé qui en fait l'objet est caractérisé en ce qu'on place les feuilles les unes sur les autres, en ce qu'on poinçonne des séries de trous à travers les couches à l'endroit où l'assemblage doit être effectué, en ce qu'on fait pénétrer de la matière thermoplastique dans les trous de manière qu'elle dépasse les bords des trous de chaque côté de l'ensemble des couches et la fait se solidifier, les parties s'étendant hors des trous étant reliées entre elles par la matière ayant pénétré à travers les trous pour maintenir ensemble les diverses couches de feuilles sans qu'il s'établisse une liaison entre elles.
Le dessin annexé illustre, à titre d'exemple, quel
ques mises en oeuvre du procédé objet de l'invention.
La fig. 1 montre deux feuilles superposées et réunies par des organes distincts.
La fig. 2 montre des bandes utilisées pour obtenir l'assemblage.
La fig. 3 illustré une mise en oeuvre dans laquelle
on utilise une seule bande pour obtenir l'assemblage.
Dans la mise en oeuvre représentée à la fig. 1,
deux feuilles 5 et 6 sont superposées avec leurs bords
alignés et une série de trous 7 sont poinçonnés à
travers les deux feuilles.
Chaque feuille 5 et 6 est faite de deux couches
de polyéthylène de haute densité et a été orientée par
allongement et superposée de manière qu'une des couches forme un certain angle avec l'autre couche.
Du chlorure de polyvinyle à l'état fluide est amené
dans les trous 7, passe des deux côtés des couches
et forme, en se solidifiant, des boutons présentant
des têtes 8 et 9 de chaque côté des couches, lesdites têtes étant reliées au centre par des parties médianes 10.
A la fig. .2,d.es bandes continues 11 et 12 de polymère thermoplastique sont utilisées pour assembler les feuilles 5 et 6. Les deux bandes sont réunies
à travers les trous 7 par soudure à haute-fréquence ou par soudure supersonique.
A la fig. 3, une simple bande de polymère ther moplastique est pliée autour des bords des feuilles
5 et 6 qui doivent être réunies, et est assemblée par soudure à travers les trous 7.
Les feuilles ainsi assemblées sont destinées à constituer des articles d'emballages, notamment des sacs. Pour fabriquer ces derniers, on utilise deux couches de feuilles de polyéthylène superposées transversalement, comme décrit ci-dessus, qui sortent d'entre deux paires de rouleaux tournant par intermit- tenue grâce à un mécanisme à roue à rochet Les feuilles superposées sont alors amenées à des dispositifs de poinçonnage qui sont actionnés en synchronisme avec l'avance intermittente des pellicules, et une série de trous sont poinçonnés dans les feuilles à proximité de leurs bords. Chaque dispositif de poin çonnage perce une série de trous sur le pourtour des feuilles à des intervalles correspondant à la longueur des sacs à fabriquer.
Les séries de trous longitudinaux proches des bords sont recouverts, de chaque côté, par des bandes de chlorure de polyvinyle fournies à partir de bobines, lesdites bandes étant soudées ensemble à travers les trous par soudure à haute-fréquence.
Les trous poinçonnés dans la largeur des feuilles sont recouverts de bandes déchlorure de polyvinyle provenant également d'une bobine et sont soudées à travers les trous comme indiqué ci-dessus. Une fois les bandes détachées- des bobines, les sacs terminés sont découpés à leur grandeur finale devant la prochaine série de trous traversant les feuilles.
Pour obtenir un assemblé satisfaisant, il est important d'éviter d'une part, un chauffage du polymère
orienté proche de son point de fusion et, d'autre part,
de souder la matière thermoplastique déposée dans
les trous au polymère orienté.
Enfin, il faut que les têtes et les bandes utilisées pour l'assemblage n'agissent pas comme des boutons
rigides, mais restent flexibles pour absorber uniformé
ment les contraintes et les chocs. Dans ce but, l'épais
seur des têtes et des bandes de chaque côté des pelli
cules ne doit pas de préférence dépasser 2 à 5 fois
l'épaisseur desdites feuilles. De préférence, le diamè
tre des trous correspond de 10 à 100 fois l'épaisseur
de la pellicule. Les trous sont de préférence circulai
res et doivent être poinçonnés proprement pour mini
miser les effets de déchirure. Les espaces entre les
trous sont, de préférence, de 1 à 5 fois le diamètre
des trous.
Si on essaie d'assembler ainsi des feuilles étirées
bi-axialement et d'autres feuilles de moindre résis
tance aux déchirures, les trous ont tendance à se
déchirer. Même lorsqu'on utilise des feuilles non
orientées, la matière autour des trous file à l'usage et les trous s'élargissent de plus en plus, puisque lesdites feuilles présentent toujours une faible résis
tance aux déchirures.
Les trous peuvent être poinçonnés en lignes droi
tes ou courbés. I1 faut que le point de fusion du poly
mère utilisé pour les bandes soit toujours inférieur
au point dè fusion des feuilles orientées. Par exem
ple, le chlorure de polyvinyle est une matière appro
priée pour assembler des feuilles superposées transversalement et constituées par un polyéthylène de haute densité et supportant une température d'envi
ron 1000 C.
On peut assembler les feuilles superposées trans
versalement le long de leurs bords d'une manière
continue pour former un tube. Les deux bandes de
polymère fondu s'étendent alors au-delà des bords
des feuilles et sont soudés ensemble au-delà desdits
bords. Pour rendre la soudure plus résistante et
étanche, on peut utiliser deux bandes étroites de polymère étiré qui sont disposées de chaque côté des feuilles orientées avant le poinçonnage des trous et
avant d'appliquer le polymère fondu.
Les bandes qui sont placées sur chaque côté de
la paire de feuilles orientées, peuvent être des bandes
ngides en matière thermoplastique qui sont ensuite
chauffées et soudées dans les trous. Les bandes peu- vent, dans ce cas, avoir un point de fusion plus élevé
que celui du polymère orienté, mais l'application de la chaleur doit se limiter uniquement aux trous. La soudure peut être effectuée soit à haute fréquence,
soit aux ultra-sons.
A method of making an article composed of two or more layers of sheets
superimposed thermoplastic anisolvape
The object of the present invention is a method of manufacturing an article composed of at least two layers of superimposed sheets of anisotropic thermoplastic material.
It is known that, as opposed to other plastic sheets, sheets formed of two anisotropic layers superimposed so that the orientation directions form an angle, for example 90 ", have a greater initial resistance to tearing and to stress. continuation of tears already initiated It has therefore been proposed to use such materials to make bags, cones and other packaging articles for transporting heavy objects.
However, the sheets formed of films superimposed transversely have not been used heretofore to manufacture such packaging articles, because the known welding methods, even that with ultrasound, did not allow to obtain an assembly. resistant, since the anisotropy was destroyed by the melting of the material during welding.
The experiments carried out have shown that the solder is only satisfactory if a sheet which melts with difficulty is inserted between the two surfaces to be joined and the intensity of the heating is very precisely regulated to avoid shrinkage. With such precautions, welding becomes too complicated to be industrially exploitable with advantage.
It has also been suggested to use adhesives. With the latter, sufficient strength can only be obtained by employing special adhesives which, during installation, must be cured at a temperature close to that of the melting point of the oriented polymeric material in order to obtain adequate adhesion and prevent adhesives do not cold flow during use. The difficulties encountered in controlling the heating and in avoiding the shrinkage of the sheets make these methods unusable in practice.
Finally, it is known that in order to increase the resistance to tears already initiated by superimposed anisotropic sheets, better results are obtained by sewing them rather than using other sheets to prevent tearing.
Anisotropic sheets resemble textile materials in so far as the long chain molecules are aligned parallel to each other and are assembled, upon crystallization, in the form of threads which appear under the microscope.
On the other hand, the properties of these sheets are so different from those of woven textile materials that only a heavy thread can be used to make the seams; even the holes produced by the seam widen when the seam is subjected to tension, before the tearing stops.
The object of the present invention is to remedy the aforementioned drawbacks and the method which forms the subject thereof is characterized in that the sheets are placed on top of each other, in that series of holes are punched through the layers. at the point where the assembly is to be carried out, in that thermoplastic material is penetrated into the holes so that it protrudes from the edges of the holes on each side of the set of layers and makes it solidify , the parts extending out of the holes being interconnected by the material having penetrated through the holes to hold together the various layers of sheets without establishing a bond between them.
The accompanying drawing illustrates, by way of example, which
ques implementations of the method of the invention.
Fig. 1 shows two sheets superimposed and united by separate organs.
Fig. 2 shows bands used to obtain the assembly.
Fig. 3 illustrates an implementation in which
a single strip is used to obtain the assembly.
In the implementation shown in FIG. 1,
two sheets 5 and 6 are superimposed with their edges
aligned and a series of holes 7 are punched
through the two sheets.
Each sheet 5 and 6 is made of two layers
of high density polyethylene and has been oriented by
elongation and superimposed so that one of the layers forms an angle with the other layer.
Polyvinyl chloride in the fluid state is fed
in holes 7, go on both sides of the diapers
and forms, by solidifying, buttons presenting
heads 8 and 9 on each side of the layers, said heads being connected in the center by middle parts 10.
In fig. .2, d.es continuous bands 11 and 12 of thermoplastic polymer are used to assemble sheets 5 and 6. The two bands are joined
through the holes 7 by high-frequency welding or by supersonic welding.
In fig. 3, a simple strip of thermoplastic polymer is folded around the edges of the sheets
5 and 6 which must be joined together, and is assembled by welding through holes 7.
The sheets thus assembled are intended to constitute packaging articles, in particular bags. To manufacture the latter, two layers of polyethylene sheets superimposed transversely are used, as described above, which come out between two pairs of rollers rotating intermittently thanks to a ratchet wheel mechanism The superimposed sheets are then brought to punching devices which are actuated in synchronism with the intermittent advance of the films, and a series of holes are punched in the sheets near their edges. Each punching device drills a series of holes around the periphery of the sheets at intervals corresponding to the length of the bags to be produced.
The series of longitudinal holes near the edges are covered, on each side, by strips of polyvinyl chloride supplied from coils, said strips being welded together through the holes by high frequency welding.
The punched holes in the width of the sheets are covered with polyvinyl dechloride strips also coming from a coil and are welded through the holes as shown above. Once the strips are detached from the spools, the finished bags are cut to their final size in front of the next set of holes through the sheets.
To obtain a satisfactory assembly, it is important to avoid, on the one hand, heating of the polymer
oriented close to its melting point and, on the other hand,
to weld the thermoplastic material deposited in
the holes to the oriented polymer.
Finally, the heads and bands used for assembly must not act as buttons
rigid, but remain flexible to absorb uniform
ment stresses and shocks. For this purpose, the thick
seur heads and bands on each side of the pelli
cules should preferably not exceed 2 to 5 times
the thickness of said sheets. Preferably, the diameter
tre holes correspond to 10 to 100 times the thickness
of the film. The holes are preferably circulai
res and must be punched cleanly for mini
bet the effects of tearing. The spaces between
holes are preferably 1 to 5 times the diameter
Holes.
If we try to put together stretched sheets
bi-axially and other less resistant sheets
tears, the holes tend to
tear. Even when using non
oriented, the material around the holes spins with use and the holes widen more and more, since said sheets always have a low resistance
tance to tears.
Holes can be punched in straight lines
your or curved. The melting point of the poly
mother used for bands is always inferior
at the melting point of the oriented sheets. For example
ple, polyvinyl chloride is an appropriate material
required to assemble transversely superimposed sheets made of high density polyethylene and withstanding a temperature of approx.
ron 1000 C.
We can assemble the superimposed sheets trans
versally along their edges in a way
continues to form a tube. The two bands of
molten polymer then extend beyond the edges
sheets and are welded together beyond said
edges. To make the weld more resistant and
waterproof, two narrow strips of stretched polymer can be used which are arranged on each side of the oriented sheets before punching the holes and
before applying the molten polymer.
The bands that are placed on each side of
the pair of oriented sheets, can be strips
ngides in thermoplastic material which are then
heated and welded in the holes. The bands may, in this case, have a higher melting point.
than that of the oriented polymer, but the application of heat should be limited to the holes only. Welding can be carried out either at high frequency,
or with ultrasound.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB20338/63A GB1018515A (en) | 1963-05-22 | 1963-05-22 | Seaming cross-laminated thermoplastic films |
Publications (1)
Publication Number | Publication Date |
---|---|
CH421489A true CH421489A (en) | 1966-09-30 |
Family
ID=10144301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH668864A CH421489A (en) | 1963-05-22 | 1964-05-22 | A method of manufacturing an article composed of at least two layers of superimposed sheets of thermoplastic anisolvape material |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE648313A (en) |
CH (1) | CH421489A (en) |
ES (1) | ES300080A1 (en) |
FR (1) | FR1409291A (en) |
GB (1) | GB1018515A (en) |
NL (1) | NL6405685A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4217384A (en) * | 1976-10-23 | 1980-08-12 | Edv-Druck Walter Schnug Kg | Multiple sets, particularly endless sets |
-
1963
- 1963-05-22 GB GB20338/63A patent/GB1018515A/en not_active Expired
-
1964
- 1964-05-21 NL NL6405685A patent/NL6405685A/en unknown
- 1964-05-21 ES ES0300080A patent/ES300080A1/en not_active Expired
- 1964-05-22 BE BE648313A patent/BE648313A/en unknown
- 1964-05-22 FR FR975394A patent/FR1409291A/en not_active Expired
- 1964-05-22 CH CH668864A patent/CH421489A/en unknown
Also Published As
Publication number | Publication date |
---|---|
GB1018515A (en) | 1966-01-26 |
FR1409291A (en) | 1965-08-27 |
ES300080A1 (en) | 1964-12-01 |
NL6405685A (en) | 1964-11-23 |
BE648313A (en) | 1964-09-16 |
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