WO1994026503A1 - Verstreckter, verschweissbarer streifen aus kunststoff und daraus hergestellte strukturen - Google Patents
Verstreckter, verschweissbarer streifen aus kunststoff und daraus hergestellte strukturen Download PDFInfo
- Publication number
- WO1994026503A1 WO1994026503A1 PCT/EP1994/001455 EP9401455W WO9426503A1 WO 1994026503 A1 WO1994026503 A1 WO 1994026503A1 EP 9401455 W EP9401455 W EP 9401455W WO 9426503 A1 WO9426503 A1 WO 9426503A1
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- WIPO (PCT)
- Prior art keywords
- strip
- strips
- absorption particles
- plastic
- absorption
- Prior art date
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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
- 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
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
- B29C65/1425—Microwave radiation
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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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
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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
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
- B29C65/1435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. transmission welding
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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
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/1477—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier
- B29C65/1483—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier coated on 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
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
- B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
- B29C65/3608—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements
- B29C65/3612—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements comprising fillers
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/58—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising fillers only, e.g. particles, powder, beads, flakes, spheres
- B29C70/64—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising fillers only, e.g. particles, powder, beads, flakes, spheres the filler influencing the surface characteristics of the material, e.g. by concentrating near the surface or by incorporating in the surface by force
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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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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/52—Mulches
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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
- B29C66/739—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 material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—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 material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
- B29C66/73921—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 material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
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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
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/007—Narrow strips, e.g. ribbons, tapes, bands
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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
- B29L2031/727—Fastening elements
- B29L2031/7276—Straps or the like
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/212—Electromagnetic interference shielding
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
Definitions
- the invention relates to a stretched, weldable strip of plastic and structures made therefrom.
- Such strips are known for example from DE-OS 22 46 051 for the production of mats.
- the strips consist of two polymer layers with different melting points, one polymer forming the reinforcement and therefore being stretched, while the other polymer with the lower melting point is used to weld the strips.
- the selection of the plastics to be used is problematic. During the subsequent stretching of these at least double-layer strips, cracking, even peeling off of the layer (s) intended for welding can occur.
- the selection of appropriate plastics is also limited to a few pairings, since as a rule only those plastic pairings are suitable that adhere well to one another and in which the difference between the two melting points is as large as possible. Will the If the melting point difference is chosen too low, the polymer which ensures the strength of the strip is disoriented and thus the strip is reduced in strength. The smaller the melting point difference, the more so.
- stripes is intended to summarize all those structures which have a significantly larger dimension in one direction than in the other two directions running perpendicular to the first direction.
- strips are to be understood as meaning, for example, monofilaments, multifilaments or ribbons.
- the object of the present invention is to at least largely eliminate the disadvantages mentioned above.
- Strips are to be made available which can be welded to one another with little effort. When such strips are welded, they should suffer as little loss of strength as possible.
- This object is achieved in the case of a stretched, weldable strip of plastic, in that it has at least one surface in which absorption particles are embedded, which have a significantly higher absorption capacity for electromagnetic radiation in the frequency range from 10 to 50,000 MHz have than the plastic from which the strip consists.
- the strips according to the invention can be produced by the methods customary in the production of two-layer strips, but the finished strip now has the same plastic over the entire cross section. A Stretching to increase the strength and the modulus of the strip is thus possible without the risk of cracking and peeling.
- welding due to the incorporated absorption particles, almost only the area containing these particles is melted, so that outside of the area containing the absorption particles, the strips are largely, even mostly completely disoriented, so that the strength of the strips after welding should have can be predetermined much more precisely than with the strips known today.
- the strips according to the invention are particularly notable when the absorption particles have a conductivity which is at least three times as high, in particular at least ten times as high, as the conductivity of the plastic from which the strip is made.
- the strip preferably has a thickness which is at least 10 times as large as the layer thickness of the surface layer containing the absorption particles.
- Strips consisting of one or more monofilament (s) or multifilament yarn (s) have proven particularly useful.
- Strips with a rectangular cross section have proven particularly useful, the width of the rectangle forming the cross section being at least 5 times as large as the height of this rectangle.
- the strips according to the invention are particularly suitable as plastic packaging tapes which are welded together at their ends when they are used. In the case of baking tapes in particular, it is important that their strength is not weakened in the area of the weld.
- the invention also relates to a strip, which is characterized in that it is welded at its ends to itself via the surface layer containing the absorption particles. It is recommended that both surface layers of the strip contain absorption particles.
- the welding is carried out by pressing the two ends of the strip together and applying electromagnetic radiation in the frequency range in which the absorption particles absorb a particularly large amount of energy. In this case, it is generally sufficient if the strips for carrying out the welding are exposed to the electromagnetic radiation for approximately 10 to 100 milliseconds, for example at the officially approved frequencies of 2.45 or 5.8 GHz.
- the strips according to the invention are also particularly suitable for the production of a mat as described in DE-OS 22 46 051.
- the mat according to the invention is distinguished by the fact that it consists of intersecting strips which at their points of intersection with one another are welded, and that they contain strips which are welded to one another via their surface layer containing the absorption particles. If the strips are laid one on top of the other in the manner of a scrim, it is sufficient if at least one layer of strips according to the invention is present which has the surface layer containing the absorption particles as a contact layer with the further strips placed on these strips.
- the welding can be carried out in a simple manner by pressing and exposure to high-frequency radiation such that a polymer structure corresponding to a weld is present almost only in the region of the layer containing the absorption particles after the weld.
- the strips advantageously have absorption particles on both sides in their surface layers.
- the surface layer containing the absorption particles only has to have a thickness of a few tenths of a millimeter or less, for example 10 to 40 ⁇ m.
- these mesh mats After the welding has been carried out, these mesh mats have almost the same strength as the sum of the strengths of the strips or strips lying in one direction. It is sufficient here for the bands to be exposed to the electromagnetic radiation, for example at 2.45 or 5.8 GHz, for carrying out the welding for about 10 to 100 milliseconds.
- the mats according to the invention are particularly suitable for soil stabilization, for example on slopes, as Underground for landfills or for the track foundation for rail vehicles.
- the strips can have loops at their ends, which can be produced in a simple manner by turning over the strips according to the invention at their ends and then again, for example, the end of the respective strip with the strip itself is connected by electromagnetic radiation in such a way that a loop is formed.
- the mat according to the invention is therefore also characterized in that at least some of the strips forming the mat have loops at their ends.
- the strips according to the invention are welded in a very short time, which is generally well under one second.
- the conversion of the electromagnetic radiation into heat takes place almost exclusively in the area in which the absorption particles are embedded, so that only this area of the plastic is converted into melt, so that the area of the welded joint is good by choosing the thickness of the absorption particles holding surface layer can be predetermined.
- the embedment depth of the absorption particles allows the area which is used to produce the welded joint to be determined fairly precisely, while the other areas of the strip are at most slightly heated so that their orientation and / or degree of crystallization can be obtained.
- the use of the strips according to the invention is therefore particularly recommended whenever, for example, a high strength of the plastic obtained in strips from welding structures is desired, since the welding area in which welding is known is known a disorientation takes place, can be determined fairly precisely beforehand, so that the strength of a welded structure created using the strips according to the invention can be adjusted.
- the increase in the strength of the plastic strips is achieved in a known manner by stretching the strips, which brings about a significant increase in the orientation of the plastic polymer.
- the stored quantity of absorption particles is decisive for localizing the welding point when performing the welding. It has proven to be particularly advantageous here if the absorption particles are incorporated into the surface of the element to be welded in such an amount that the distance between adjacent absorption particles is smaller than the thickness of the surface layer which contains the absorption particles contains. The smaller the distance between adjacent absorption particles, the more the heat is concentrated on the surface layer that contains the absorption particles. It is particularly advantageous here if the surface layer with the incorporated absorption particles has a conductivity that is at least three times as high as the conductivity of the plastic from which the strips are formed. The object of the invention is achieved particularly favorably if the conductivity of the absorption particles have a conductivity which is at least 10 times as high as the conductivity of the strip.
- Soot particles, magnetite powder and / or metal powder have proven to be particularly favorable as absorption particles. Further suitable absorption particles are described in WO 91/19 036.
- the thickness the welding area of the surface layer containing the absorption particles can be predetermined well. Therefore, thin surface layers containing the absorption particles are preferred for carrying out the welding. For larger strips, the layer thickness is preferably selected in the range of a few millimeters.
- the absorption of the absorption particles can be achieved, for example, by the absorption of the absorption particles being such that the absorption particles are applied to the surface of the strip to be welded in a thin layer and are pressed into the surface.
- the absorption particles are pressed in and strips are then cut out of the film.
- the pressing can be done, for example, by rolling.
- the strips according to the invention can be obtained particularly cheaply via multicomponent spinnerets in which the same polymer is in principle supplied to all nozzle channels, but absorption particles are admixed with at least one polymer stream which is provided for forming an outer layer. Depending on whether one or more surfaces of the strip are to be used for a weld, corresponding surface layers with absorption particles can be provided.
- strips according to the invention are only to be welded on one side, these strips only require a two-layer structure, whereas in the case of double-sided welding, two surfaces should naturally contain absorption particles, which is why there is one Three-layer construction is suitable.
- bi-component threads are suitable, for example, in side-by-side arrangement, but in particular in core-sheath arrangement, however, both components contain the same polymer and only in the one intended for welding Layer absorption particles were mixed.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Composite Materials (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6524916A JPH08510180A (ja) | 1993-05-13 | 1994-05-06 | プラスチックからなる延伸された溶接可能な細長片 |
EP94916209A EP0697953A1 (de) | 1993-05-13 | 1994-05-06 | Verstreckter, verschweissbarer streifen aus kunststoff und daraus hergestellte strukturen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4316015A DE4316015A1 (de) | 1993-05-13 | 1993-05-13 | Verstreckter, verschweißbarer Streifen aus Kunststoff und daraus hergestellte Strukturen |
DEP4316015.8 | 1993-05-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994026503A1 true WO1994026503A1 (de) | 1994-11-24 |
Family
ID=6487994
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1994/001455 WO1994026503A1 (de) | 1993-05-13 | 1994-05-06 | Verstreckter, verschweissbarer streifen aus kunststoff und daraus hergestellte strukturen |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0697953A1 (de) |
JP (1) | JPH08510180A (de) |
CA (1) | CA2162686A1 (de) |
DE (1) | DE4316015A1 (de) |
SG (1) | SG67871A1 (de) |
WO (1) | WO1994026503A1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997047796A1 (en) * | 1996-06-11 | 1997-12-18 | Akzo Nobel N.V. | Grid comprising polymeric drawn strips and a process for making same |
DE19919289A1 (de) * | 1999-04-28 | 2000-11-02 | Mahle Filtersysteme Gmbh | Verfahren zum Herstellen eines dichten Abschlusses aus Kunststoff an den Stirnkanten eines zick-zack-förmig gefalteten Bahnenmaterials eines Filters |
US6312198B1 (en) | 1997-12-01 | 2001-11-06 | Akzo Nobel Nv | Geogrid and civil engineering structure comprising such a geogrid |
US20140308476A1 (en) * | 2011-11-17 | 2014-10-16 | Astenjohnson, Inc. | Coextruded laser weld enabled polymer film or filament and fabrics made therefrom |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4447521A1 (de) * | 1994-10-07 | 1996-04-11 | Fraunhofer Ges Forschung | Verfahren zur Herstellung von Filtermaterial aus partikelförmigen, thermoplastischen Polymeren |
DE19820951A1 (de) * | 1998-05-11 | 1999-11-18 | Huesker Synthetic Gmbh & Co | Verbundstoffbahn zum Bewehren von Erdschichten |
DE19913479C1 (de) * | 1999-03-25 | 2000-10-19 | Naue Fasertechnik | Großflächige hochzugfeste Geogitter, Verfahren und Vorrichtung zu deren Herstellung und deren Verwendung als Drain- und Bewehrungsgitter sowie als Zäune |
WO2001076851A1 (de) * | 2000-04-06 | 2001-10-18 | Formteile Helmer Gmbh | Schweissverbindung zwischen zwei polymer-teilen, insbesondere im rohrleitungs- und rohrarmaturbau |
DE10302256A1 (de) * | 2003-01-22 | 2004-08-05 | Hydac Technology Gmbh | Verfahren zum Herstellen einer Speicherblase |
DE102017111490A1 (de) | 2017-05-24 | 2018-11-29 | Boge Elastmetall Gmbh | Verfahren zum Herstellen eines Bauteils aus Faserverbundwerkstoff |
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DE2246051A1 (de) * | 1971-09-25 | 1973-04-05 | Nippon Petrochemicals Co Ltd | Web- und vliesstoffe aus gestreckten kunststoffbaendern sowie verfahren zu deren herstellung |
DE2851612A1 (de) * | 1978-11-29 | 1980-06-12 | Wilfried Boldt | Kunststoffschweissen und -verfluessigen mit hilfe des elektrischen stromes |
GB2196343A (en) * | 1983-10-03 | 1988-04-27 | Courtaulds Plc | Microwave-absorbing fibres and filaments |
EP0314548A2 (de) * | 1987-10-27 | 1989-05-03 | Axter | Dichtungsbelag, Verfahren zu dessen Verbindung oder Befestigung und Vorrichtung zur Durchführung des Verfahrens |
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DE2043034A1 (de) * | 1970-08-31 | 1972-03-16 | Metallgesellschaft Ag | Werkstoff zur Stoßenergieabsorption |
BE790254A (fr) * | 1971-10-18 | 1973-04-18 | Ici Ltd | Matieres textiles conductrices |
US3802985A (en) * | 1972-01-06 | 1974-04-09 | Heller W | Heatable stratified material and manufacturing method therefor |
FR2301360A1 (fr) * | 1975-02-19 | 1976-09-17 | Emballage Ste Gle Pour | Ensemble pour le soudage a chaud de pieces minces |
US4211816A (en) * | 1977-03-11 | 1980-07-08 | Fiber Industries, Inc. | Selfbonded nonwoven fabrics |
US4129677A (en) * | 1977-05-31 | 1978-12-12 | Monsanto Company | Melt spun side-by-side biconstituent conductive fiber |
AU3951678A (en) * | 1977-09-13 | 1980-03-13 | Heller, William C. Jr. | Fusion bonding non-elastomeric thermoplastic elements |
DE3339899A1 (de) * | 1983-11-04 | 1985-05-15 | Hoechst Ag, 6230 Frankfurt | Verwendung von bindemitteln auf basis von haertbaren phenolharzen zur bindung von faserigen materialien fuer die herstellung von vliesen |
ES8600440A1 (es) * | 1984-12-03 | 1985-10-01 | Frances Izquierdo Eduardo | Procedimiento para la obtencion de textiles indetectables a las radiaciones infrarrojas |
US4895620A (en) * | 1986-02-18 | 1990-01-23 | Armstrong World Industries, Inc. | Electrically conductive carbon-coated fibers |
DE4036265A1 (de) * | 1990-11-14 | 1992-05-21 | Hoechst Ag | Bandfoermiges halbzeug, verfahren zu dessen herstellung und verwendung |
-
1993
- 1993-05-13 DE DE4316015A patent/DE4316015A1/de not_active Withdrawn
-
1994
- 1994-05-06 JP JP6524916A patent/JPH08510180A/ja active Pending
- 1994-05-06 SG SG1995001362A patent/SG67871A1/en unknown
- 1994-05-06 CA CA002162686A patent/CA2162686A1/en not_active Abandoned
- 1994-05-06 WO PCT/EP1994/001455 patent/WO1994026503A1/de not_active Application Discontinuation
- 1994-05-06 EP EP94916209A patent/EP0697953A1/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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DE2246051A1 (de) * | 1971-09-25 | 1973-04-05 | Nippon Petrochemicals Co Ltd | Web- und vliesstoffe aus gestreckten kunststoffbaendern sowie verfahren zu deren herstellung |
DE2851612A1 (de) * | 1978-11-29 | 1980-06-12 | Wilfried Boldt | Kunststoffschweissen und -verfluessigen mit hilfe des elektrischen stromes |
GB2196343A (en) * | 1983-10-03 | 1988-04-27 | Courtaulds Plc | Microwave-absorbing fibres and filaments |
EP0314548A2 (de) * | 1987-10-27 | 1989-05-03 | Axter | Dichtungsbelag, Verfahren zu dessen Verbindung oder Befestigung und Vorrichtung zur Durchführung des Verfahrens |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997047796A1 (en) * | 1996-06-11 | 1997-12-18 | Akzo Nobel N.V. | Grid comprising polymeric drawn strips and a process for making same |
US6312198B1 (en) | 1997-12-01 | 2001-11-06 | Akzo Nobel Nv | Geogrid and civil engineering structure comprising such a geogrid |
AU742383B2 (en) * | 1997-12-01 | 2002-01-03 | Akzo Nobel N.V. | Geogrid and civil engineering structure comprising such a geogrid |
DE19919289A1 (de) * | 1999-04-28 | 2000-11-02 | Mahle Filtersysteme Gmbh | Verfahren zum Herstellen eines dichten Abschlusses aus Kunststoff an den Stirnkanten eines zick-zack-förmig gefalteten Bahnenmaterials eines Filters |
US20140308476A1 (en) * | 2011-11-17 | 2014-10-16 | Astenjohnson, Inc. | Coextruded laser weld enabled polymer film or filament and fabrics made therefrom |
Also Published As
Publication number | Publication date |
---|---|
EP0697953A1 (de) | 1996-02-28 |
CA2162686A1 (en) | 1994-11-24 |
SG67871A1 (en) | 1999-10-19 |
JPH08510180A (ja) | 1996-10-29 |
DE4316015A1 (de) | 1994-11-17 |
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