EP0570468A1 - Method and arrangement for forming a load-bearing joint by means of compressed cellular plastic material that has been made to expand by heating - Google Patents
Method and arrangement for forming a load-bearing joint by means of compressed cellular plastic material that has been made to expand by heatingInfo
- Publication number
- EP0570468A1 EP0570468A1 EP92904850A EP92904850A EP0570468A1 EP 0570468 A1 EP0570468 A1 EP 0570468A1 EP 92904850 A EP92904850 A EP 92904850A EP 92904850 A EP92904850 A EP 92904850A EP 0570468 A1 EP0570468 A1 EP 0570468A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- adhesive
- filler material
- hot melt
- load
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6812—Compressable seals of solid form
-
- 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
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
-
- 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
- B29C65/66—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
- B29C65/68—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined using auxiliary shrinkable elements
-
- 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
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/114—Single butt joints
- B29C66/1142—Single butt to butt joints
-
- 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
-
- 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
-
- 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
- B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
- B29C65/484—Moisture curing adhesives
-
- 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
- B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
- B29C65/485—Multi-component adhesives, i.e. chemically curing as a result of the mixing of said multi-components
-
- 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
Definitions
- the present invention is a method for forming load-bearing joints through the use of compresse cellular plastic material having a stable form at room temperature, and which, after insertion int the joint area, is made to expand through heating so that the whole of the joint area is fille
- Bonding between the filler material and the base material can be secured by applying a one o two-component adhesive.
- bonding can be secured by means of a hot melt adhesiv or a hot melt adhesive with setting agent which, during the expansion phase of the plastic fillin material, melts under elevated temperature, and thereby a bond is formed between the fille material and the base material.
- the components making up the joint are dry when bein handled.
- the method is applicable for the load-bearing joining of core material in sandwic constructions, but it is also applicable for joining concrete panels, wall panels, window panel etc. in building constructions.
- mos of the methods are based on a chemical process, e.g. foaming or vulcanization.
- the presen method is based instead on storing energy in the form of compressed gas at room temperature which energy is then released at elevated temperature (the heat distortion temperature of th plastic filler material).
- U.S. Patent 4,647,716 describes a method that is similar to the present method. However even in this case the purpose is to seal.
- Cellular plastic material is used as core material in sandwich constructions. Ships and boats, fo example, are often constructed in accordance with this principle.
- the core material is fixed t a wooden construction formed in the shape of the boat.
- Fiber-reinforced plastic is then applied to both the inside and the outside of the core material.
- the core material used in this type o sandwich construction is in the form of boards of various sizes. When the boards are fitted together, gaps are left between them. In order to obtain a continuous interaction of forces in the sandwich construction, these gaps are filled with a material that joins the edges of the boards together.
- Cellular plastic material usually has a density of between 0.045 to 0.25 kg dm* ** .
- Using a putty compound increases the weight of the construction, which is not desirable, and results in discontinuities in the core material which may have a negative affect on the strength of the sandwich construction in cases e.g. of impact or when the structure is overloaded.
- Other negative affects are the occurrence of thermal bridges and acoustic transmission.
- the joints are filled by injecting the putty compound. This method has been shown to result in incompletely filled joints, which also weakens the sandwich construction.
- the filler material is first prepared by pressing together strips (2) of cellular plastic material under elevated temperature, see fig. 2, so that their thickness is reduced to the thickness required by the method, e.g. 30% of their original thickness, see fig. 3. By allowing the compressed strips to cool before the pressure is removed, the strips will retain their reduced thickness even after the pressure has been removed.
- a film of moisture-cured hot melt adhesive (4) is applied to the filler material, either during compression or afterwards.
- the filler material with adhesive coating is inserted into the joint area (1), see fig. 4. By heating the strips of filler material to approx. 7fC, the filler material softens and expands because of internal excess pressure, until the joint area is filled.
- the adhesive melts, and because the filler material expands, it presses the adhesive against the base material so that a bond is formed between the filler material and the base material (5), see fig. 5.
- the filler material hardens and regains its original properties. With the hardening of the filler material, further expansion is prevented, which ensures that the joint remains stable.
- the adhesive is cured through the humidity of the air.
- the filler material must meet set strength requirements.
- the adhesive must meet set strength requirements.
- the bond between the filler material and the base material must meet the same requirements as are set on the components which make up the joint, i.e. the filler material, the hot melt adhesive, and the base material.
- the filler material In order for the last requirement to be met, the filler material must fill the joint ar completely, i.e. the filler material must expand evenly and completely along the whole of t joint.
- the hot melt adhesive must melt completely during the time that the filler mater is exerting the necessary pressure on the adhesive. This means that the heat must be applied such way that the above requirements can be met.
- the present invention offers a solution to t problem of forming an essentially load-bearing joint in e.g. sandwich constructions.
- the present invention offers a method which allows bonding at relatively l temperatures, e.g. at 60°C, and where the filler material, when expanded, regains its origi form.
- relatively l temperatures e.g. at 60°C
- the filler material when expanded, regains its origi form.
- the size of the filler strips can be predetermined. Expansion through chemi foaming, on the other hand, is always uncontrolled.
- rigid cellular plastic material with closed cells is used. This a prerequisite for expansion to occur as well as for ensuring sufficient rigidity and strength the finished joint.
- Strips of filler material are sawn, or by some other means cut o from the base material, e.g. PVC cellular plastic.
- the strips of filler material before compression, should be somewhat thicker than t joint area they are to be inserted into. The thicker are the strips of filler material, the greater w be the pressure on the adhesive when the filler material expands during the heating stage. B if the filler material is to regain maximum strength, the filler material must expand as complete as possible, so that the cells in the material will have maximum spherical form and thus give t desired strength.
- the filler material is then placed in a heating unit that has been heated to approx. 8CP After heating, the filler material is then placed in a press where it is compressed to approx. 20 50% of its original thickness. During this operation, the filler material can be coated with a fil of hot melt adhesive which, because of the pressure and the heat from the filler material, wi adhere to the filler material in the designed manner. If the film of hot melt adhesive is prepare a few minutes before it is applied (just before the press stage), some hot melt adhesives will sti adhere to the filler material even after they have stiffened.
- the hot melt adhesive can also be applied to the filler material at a later stage.
- T simplest way is to fold the adhesive film around the strip of filler material before it is inserte into the joint area.
- the adhesive film may even consist of two separate layers applied one to eac side of the' filler material.
- the compressed strips of filler material are inserted into the joint area and are heated by mean of electromagnetic radiation, e.g. microwaves.
- the hot melt adhesive consisting e.g. polyurethane, is affected by the elecromagnetic field and thus becomes heated.
- the filler materi is indirectly heated when the adhesive is heated. Since the electromagnetic field is formed in suc a way that it is homogeneous in the area of the joint, an immediate and uniform heating of th hot melt adhesive takes place. The indirect heating of the filler material is, thereby, also unifor Expansion is uniform and an evenly distributed pressure on the adhesive is obtained.
- the finishing stage of the process is limited to removing excess hot melt adhesive whic has been pressed out during the expansion stage. What remains, after the hardening process i complete, is a well-filled, load-bearing joint.
- Other cellular plastics than PVC can be used as filler material, or as core material, e.g cellular plastic of PUR, PS, etc. Most cellular plastics are little affected by electromagneti radiation, and thus the advantages of the heating procedure are retained, i.e. unnecessary heatin of the base material is avoided. Note also that although polyurethane in the form of hot mel adhesive becomes heated very quickly, a cellular plastic of the same material becomes hardly heated at all by electromagnetic radiation during the same period of time.
- heat can be applied by means of a hot air device, electric blankets, etc.
- care must be taken to regulate the temperature so that the material of which the construction is comprised will not be damaged. This is particularly important in large constructions where the heat is to be applied for relatively long periods of time, e.g. for a few hours at a time.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
L'invention se rapporte à un procédé de réalisation de joints porteurs au moyen d'un matériau en plastique cellulaire comprimé (3) dont la forme est stable à température ambiante et qui, après introduction dans l'emplacement du joint (1), est amené à dilatation par réchauffement, de façon à remplir la totalité dudit emplacement. L'adhésion entre le matériau de remplissage et le matériau de base peut s'effectuer au moyen d'un adhésif fondu à chaud ou d'un adhésif fondu à chaud comprenant un agent de durcissement (4) qui, pendant la phase de dilatation du matériau de remplissage, fond à température élevée, ce qui constitue l'adhérence entre ledit matériau de remplissage et le matériau de base (5). Dans la mise en application dudit procédé, quand le matériau de remplissage se réchauffe, l'emplacement du joint se remplit, une pression s'exerce sur l'adhésif et l'adhérence du matériau de base s'effectue simultanément. D'après ledit procédé, les constituants du joint sont secs quand on les manipule. Le procédé peut s'appliquer à la constitution de joints porteurs en matériaux à âme dans des constructions en sandwich. Il peut également s'utiliser pour assembler des panneaux en béton ou des panneaux de revêtement mural ou de fenêtres etc... dans la construction.The invention relates to a process for producing load-bearing seals using a compressed cellular plastic material (3) whose shape is stable at ambient temperature and which, after introduction into the location of the seal (1), is brought to expansion by heating, so as to fill the entire said location. The adhesion between the filling material and the base material can be carried out by means of a hot melt adhesive or a hot melt adhesive comprising a curing agent (4) which, during the expansion phase of the filling material, melts at high temperature, which constitutes the adhesion between said filling material and the base material (5). In the application of said method, when the filling material heats up, the location of the seal fills, a pressure is exerted on the adhesive and the adhesion of the base material takes place simultaneously. According to said process, the components of the seal are dry when handled. The method can be applied to the constitution of load-bearing joints made of core materials in sandwich constructions. It can also be used to assemble concrete panels or wall cladding panels or windows etc ... in construction.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9100391A SE9100391D0 (en) | 1991-02-08 | 1991-02-08 | METHOD OF TAKING COMPOUNDS WITH A COMPRESSED, WARM-EXPANDING CELL PLASTIC MATERIAL |
SE9100391 | 1991-06-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0570468A1 true EP0570468A1 (en) | 1993-11-24 |
Family
ID=20381852
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92904850A Withdrawn EP0570468A1 (en) | 1991-02-08 | 1992-02-07 | Method and arrangement for forming a load-bearing joint by means of compressed cellular plastic material that has been made to expand by heating |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0570468A1 (en) |
JP (1) | JPH06505285A (en) |
AU (1) | AU1248892A (en) |
SE (1) | SE9100391D0 (en) |
WO (1) | WO1992013704A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0664363A1 (en) * | 1994-01-20 | 1995-07-26 | Rathor Ag | Building element |
AUPN660795A0 (en) * | 1995-11-16 | 1995-12-07 | Australian Radial Timber Conversion Company (Radcon) Pty. Ltd., The | Improved drop segment fencing system |
EP1033451A3 (en) * | 1999-03-01 | 2000-09-13 | Baumanagement Johannes Tribelhorn | Method for erecting a building unit, building unit and process for connecting walls |
JP2001164670A (en) * | 2000-12-14 | 2001-06-19 | Minami Yuzo Jimusho:Kk | Airtight construction method and building member for airtight construction |
US7482038B1 (en) | 2006-04-25 | 2009-01-27 | Nucedar Mills, Inc. | Process for preparing siding |
JP4693829B2 (en) * | 2007-02-16 | 2011-06-01 | 西田製凾株式会社 | Resin plate joining method |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH503852A (en) * | 1968-12-23 | 1971-02-28 | Huber+Suhner Ag | Method for sealing joints and sealing for carrying out the method |
US3806566A (en) * | 1969-01-21 | 1974-04-23 | Dow Chemical Co | Method of filling enclosed spaces with a foam composite |
US4647716A (en) * | 1984-11-06 | 1987-03-03 | Sigmaform Corporation | Article having heat expandable sealing member |
US4898630A (en) * | 1987-11-18 | 1990-02-06 | Toyota Jidosha Kabushiki | Thermosetting highly foaming sealer and method of using it |
-
1991
- 1991-02-08 SE SE9100391A patent/SE9100391D0/en unknown
-
1992
- 1992-02-07 AU AU12488/92A patent/AU1248892A/en not_active Abandoned
- 1992-02-07 JP JP4505110A patent/JPH06505285A/en active Pending
- 1992-02-07 EP EP92904850A patent/EP0570468A1/en not_active Withdrawn
- 1992-02-07 WO PCT/SE1992/000076 patent/WO1992013704A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9213704A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU1248892A (en) | 1992-09-07 |
JPH06505285A (en) | 1994-06-16 |
SE9100391D0 (en) | 1991-02-08 |
WO1992013704A1 (en) | 1992-08-20 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 19930721 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE DK ES FR GB IT NL SE |
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17Q | First examination report despatched |
Effective date: 19950616 |
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GRAH | Despatch of communication of intention to grant a patent |
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STAA | Information on the status of an ep patent application or granted ep patent |
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18W | Application withdrawn |
Withdrawal date: 19970131 |