GB1570377A - Method for the rapid sticking of paper cardboard and plastics material - Google Patents

Method for the rapid sticking of paper cardboard and plastics material Download PDF

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Publication number
GB1570377A
GB1570377A GB14832/78A GB1483278A GB1570377A GB 1570377 A GB1570377 A GB 1570377A GB 14832/78 A GB14832/78 A GB 14832/78A GB 1483278 A GB1483278 A GB 1483278A GB 1570377 A GB1570377 A GB 1570377A
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United Kingdom
Prior art keywords
glue
book
hot air
radiators
polyvinyl acetate
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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.)
Expired
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GB14832/78A
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Henkel Dorus GmbH and Co KG
Original Assignee
Dr Rudolf Schieber GmbH and Co KG
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Publication date
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Publication of GB1570377A publication Critical patent/GB1570377A/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/1464—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 making use of several radiators
    • B29C65/1467—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 making use of several radiators at the same time, i.e. simultaneous welding
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • 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
    • 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
    • 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
    • B29C65/1432—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 direct heating of the surfaces to be joined
    • 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
    • B29C65/1448—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 radiating the edges of the parts to be joined, e.g. for curing a layer of adhesive placed between two flat parts to be joined, e.g. for making CDs or DVDs
    • 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
    • B29C65/52—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 way of applying the adhesive
    • B29C65/526—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 way of applying the adhesive by printing or by transfer from the surfaces of elements carrying the adhesive, e.g. using brushes, pads, rollers, stencils or silk screens
    • 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
    • B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42C—BOOKBINDING
    • B42C9/00—Applying glue or adhesive peculiar to bookbinding
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
    • 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
    • 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
    • B29L2031/705—Books, albums
    • B29L2031/7052—Book covers

Description

(54) METHOD FOR THE RAPID STICKING OF PAPER, CARD BOARD AND PLASTICS MATERIAL (71) We, DR. RUDOLF SCHIEBER CHEMISCHE FABRIK KG, of Postfach 23, 7085 Bopfingen, a Federal Republic of Germany, a German Company, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The invention relates to a method for the rapid sticking of paper, cardboard and plastics material, such as books, catalogues and sheets, by applying polyvinyl acetate glue, placing the spine in position, and if necessary pressing the latter.
The sticking of paper, cardboard and plastics material is known, and is particularly important in binding and casing books, catalogues, notepads and writing pads, etc., and also in backing two paper materials, paper with foil, etc.
Bookbinding at the present time is carried out according to two methods.
According to a widely used method, the book block held by clamping jaws is coated at room temperature on its rear side with a commercial polyvinyl acetate cold glue and joined to the cover part, the latter then being pressed if necessary.According to a variant of this method, after completion of the gluing stage the finished book is post-treated individually with high frequency radiators which accelerate the hardening of the glue used.
According to another method conventionally used in bookbinding technology the book spine held in jaws is coated hot with thermoplastic adhesive, e.g. at 1800C, and the spine sheet is immediately applied and is pressed on if necessary. The thermoplastic adhesive method is more advantageous to carry out compared with the cold white glue method since the books can be bound at much higher machine throughput rates. On the other hand, the thermoplastic adhesive method has considerable disadvantages as regards quality compared with the polyvinyl acetate and white glue methods. These disadvantages are in particular a lower individual sheet tear resistance of books bound by thermoplastic adhesives, a fairly high consumption of thermoplastic adhesive, lower elasticity of the spine, as well as a reduced cold and heat resistance of the individually bound pages.These disadvantages are due to the thermoplastic properties of the adhesive, which is solid at low temperatures, with the result that books placed in cold surroundings, for example in kiosks, have only a short life if they are repeatedly opened, and to a reduced adhesiveness of the thermoplastic adhesive on account of the effect of heat. The latter disadvantage is caused by the heat softening of the commercial adhesives containing thermoplastic constituents.
There is therefore an urgent need to provide a simple, cheap method for sticking paper, cardboard and plastics material, in particular books and catalogues, in which the advantages of the aforedescribed methods can be utilised while avoiding their disadvantages. In particular, it is intended to provide a method of the type mentioned at the beginning in which the use of heat and cold resistant white glue does not have to be abandoned despite the high production output of the machines. In this connection it is in particular also intended that the disadvantage of the known cold glue method, namely the subsequent swelling of pages produced by moisture penetrating from the cold glue into the pages, is avoided in the method of the invention.
The present invention provides a method for the rapid sticking of paper, cardboard and plastics materials by applying a polyvinyl acetate glue, wherein a) a polyvinyl acetate glue modified so that it quickly responds to heat is applied to the surface to be stuck, b) the material coated with glue is passed through a heating zone provided with microwave radiators, and then c) a substantially or completely glue-free material is applied, to the glue coated material and if desired the book cover or binding is then cased.
The commercially normal cold glue based on polyvinyl acetate that is used at the present time for cold bookbinding methods is less suitable for use in the method according to the invention. This is mainly due to the fact that its heat response properties are unsatisfactory with high speed bookbinding methods. It is therefore preferred to use a polyvinyl acetate-based glue in the method according to the invention that contains a prop ortion of a plasticiser and/or solvent, and if desired also a proportion of a resin.
Plasticisers that can be used are for example phthalic acid esters and/or adipic acid esters and/or phosphoric acid esters. In particular, it may however be preferable to use a solvent in addition or alternatively, depending on the nature of the polyvinyl acetate material used. Solvents that can be used are organic solvents, and in particular also solutions of water-soluble organic polymers. Examples of these are ethyl acetate, solutions of polyvinyl alcohol, polyvinyl pyrrolidone, etc. The polyvinyl alcohol may advantageously be used having a degree of hydrolysis of 80 to 100%, preferably 85 to 89%. However, the use of non-combustible chlorinated solvents may be convenient, particularly if the heating zone is well-sealed from the atmosphere.
Solutions or dispersions of tackifying resins, such as for example derivatives of colophony or synthetic products based on unsaturated aliphatic or aromatic hydrocarbons, may be used for the resin proportion to modify the glue.
Preferably, a heating channel provided with microwave radiators is used as the heating zone. These microwave radiators are preferably directed towards the surfaces to be glued, i.e. in the case of binding books and catalogues, towards their rear side. However, if it is intended in the method according to the invention to provide the book spines in addition with a gauze or crepe lining, then this material is pressed on instead of the cover. The casing must then be carried out in a further work stage. It may be advantageous, depending on the processing, to direct the microwave radiators also on to the sides of the book so as to accelerate the gluing stage.
It is in particular preferred to blow in hot air in addition to providing microwave radiators in the heating zone, which latter may conveniently comprise a heating channel through which pass the books to be bound. In this connection, and taking into account the material used and the quality of the book, it may be expedient to adjust the temperature of the hot air and the intensity of the microwave radiators so that the temperature immediately in front of the book to be bound is 150 to 4500C, preferably between 300 to 4000C.
The method of the present invention can be used for many different applications, although its main area of application could well be the binding of books, catalogues, so-called paperbacks, issues or part issues of magazines and journals, blocks, etc.
It can however also be used in the sheet lining of e.g. paper on paperboard or cardboard, metal foil on paper, plastics foil on paper, etc. In the case where it is intended to laminate or cover metal foils according to the process of the invention, it is expedient to preheat them in order to obviate the thermal expansion of the metal foil. In the case of plastics foils only relatively temperature-resistant foils, e.g.
melamine resin or polyester foils or specially stabilised PVC foils should of course be used.
The method is however also suitable in the field of longitudinal or transverse gluing of cardboard and paper, for example in gluing paperbags and packages. Such gluing procedures are used for example in the manufacture of medicine packaging, bottle packaging, etc.
The process according to the invention provides a whole series of advantages.
These are due to the fact that the disadvantageous properties resulting from the use of thermoplastic adhesives are avoided while at the same time production outputs can be achieved that previously could be obtained only by using thermoplastic adhesives. These advantages are achieved in particular in the preferred embodiments of the invention by the fact that, inter alia, the polyvinyl acetate-based glue used hitherto in cold gluing is modified, and that it quickly responds to heat, whereby through a combination of thermal radiation and blown hot air the necessary expulsion of water from the glue and activation of the latter can be achieved in extremely short times, which in return enables the machine output rate to be raised. On account of the combination of thermal radiation and hot air blowing together with rapidly heat-responsive polyvinyl acetate glue it is generally also unnecessary to subject the already bound material to a post-heating in order to accelerate the curing, as is sometimes employed in bookbinding techniques. For this purpose high frequency radiators have hitherto been employed, whose use, quite apart from the high investment costs and the continuous high operating costs, which are largely affected by the relatively short lifetime of the Braun tubes, is also disadvantageous for another reason. Thus, for example, if the frequency of intensity of the radiators are not accurately adjusted, scorch marks are formed inside the book or a non-uniform drying results.The use of microwave radiators before the spine is applied is considerably cheaper both as regards the necessary investment costs and the continuous operating costs. The simultaneous use of hot air, provided according to a preferred embodiment of the invention, assists the action of the microwave radiators, and the hot air may for example be conveyed in a heating channel in the circulation channel. By the combined effect of hot air and thermal radiation the expulsion of water from the glue can also take place from deep within the glue, with the result that a surface skin, which has been feared up to now since it enclosed residual moisture and prevents uniform drying of the adhesive film, cannot be formed.A completely homogeneous application and secure sticking of the spine and, if the book is cased, of the cover, is possible since parallel to this there is an immediate activation of the polyvinyl acetate glue caused mainly by the thermal radiation effect.
The accompanying figures illustrate diagrammatically the method according to the invention and a book produced thereby. Fig. 1 shows a book block 1 held between pockets 4, which is subjected to the action of microwave radiators 2 in a hot air channel 3. As can be seen from the figure, the spine of the book block is already provided with a glue coating when the block enters the heating channel.
Fig. 2 shows diagrammatically the passage of the book block 1 through the hot air channel 3, a coating of glue being applied to the rear side of the block by means of a gluing machine 7. The microwave radiators 2 are arranged in the hot air channel 3 and the hot air is simultaneously circulated by means of a hot air blower 5. The book blocks, which pass through the hot air channel extremely quickly, may then readily be provided with covers 6 as a result of the glue activation that has occurred in the said channel.
Finally, Fig. 3 shows a product, namely a book, produced according to one embodiment of the method.
WHAT WE CLAIM IS: 1. A method for the rapid sticking of paper, cardboard and plastics materials by applying a polyvinyl acetate glue, wherein a) a polyvinyl acetate glue modified so that it quickly responds to heat is applied to a surface of the material to be stuck, b) the material coated with glue is passed through a heating zone provided with mic rowave radiators, and then c) a substantially or completely glue-free material is applied to the glue-coated mat erial.
2. A method according to claim 1, wherein the polyvinyl acetate glue contains a plasticiser and/or a solvent.
3. A method according to claim 2, wherein phthalic acid and adipic acid esters or polyesters and/or alkyl or aryl or alkaryl phosphates are used as plasticiser.
4. A method according to claim 2 or 3, wherein a water-soluble organic polymer is used as solvent.
5. A method according to claim 4, wherein a Polyvinyl alcohol having a degree of hydrolysis of 80 to 100% is used as solvent.
6. A method according to claim 5, wherein the degree of hydrolysis is 85 to 89%.
7. A method according to claim 2 or 3, wherein an acetate and/or alcohol and/or a halogenated hydrocarbon is used as sol vent.
8. A method according to claim 7, wherein the acetate is ethyl, butyl or ethylene-glycol acetate, the alcohol is methanol, butanol or benzyl alcohol, and the halogenated hydrocarbon is methylene chloride.
9. A method according to any preced ing claim, wherein the glue comprises a solution or dispersion of a tackifying resin.
10. A method according to claim 9, wherein the tackifying resin is a derivative of colophony or a synthetic product based on an unsaturated aliphatic or aromatic hydrocarbon.
11. A method according to any preced ing claim, wherein the heating zone is in the the form of a heating channel provided with microwave radiators.
12. A method according to any preced ing claim, wherein hot air is blown into the heating zone.
13. A method according to claim 12, wherein the temperature of the hot air and the heat output from the microwave radiators are adjusted so that the tempera ture immediately in front of the surface to be glued is between 150 and 450"C.
14. A method according to claim 13, wherein the temperature is between 300 and 400"C.
15. A book or catalogue bound by using polyvinyl acetate glue, and which has been produced by applying a modified polyvinyl acetate glue that is rapidly heat
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (19)

**WARNING** start of CLMS field may overlap end of DESC **. purpose high frequency radiators have hitherto been employed, whose use, quite apart from the high investment costs and the continuous high operating costs, which are largely affected by the relatively short lifetime of the Braun tubes, is also disadvantageous for another reason. Thus, for example, if the frequency of intensity of the radiators are not accurately adjusted, scorch marks are formed inside the book or a non-uniform drying results. The use of microwave radiators before the spine is applied is considerably cheaper both as regards the necessary investment costs and the continuous operating costs.The simultaneous use of hot air, provided according to a preferred embodiment of the invention, assists the action of the microwave radiators, and the hot air may for example be conveyed in a heating channel in the circulation channel. By the combined effect of hot air and thermal radiation the expulsion of water from the glue can also take place from deep within the glue, with the result that a surface skin, which has been feared up to now since it enclosed residual moisture and prevents uniform drying of the adhesive film, cannot be formed. A completely homogeneous application and secure sticking of the spine and, if the book is cased, of the cover, is possible since parallel to this there is an immediate activation of the polyvinyl acetate glue caused mainly by the thermal radiation effect. The accompanying figures illustrate diagrammatically the method according to the invention and a book produced thereby. Fig. 1 shows a book block 1 held between pockets 4, which is subjected to the action of microwave radiators 2 in a hot air channel 3. As can be seen from the figure, the spine of the book block is already provided with a glue coating when the block enters the heating channel. Fig. 2 shows diagrammatically the passage of the book block 1 through the hot air channel 3, a coating of glue being applied to the rear side of the block by means of a gluing machine 7. The microwave radiators 2 are arranged in the hot air channel 3 and the hot air is simultaneously circulated by means of a hot air blower 5. The book blocks, which pass through the hot air channel extremely quickly, may then readily be provided with covers 6 as a result of the glue activation that has occurred in the said channel. Finally, Fig. 3 shows a product, namely a book, produced according to one embodiment of the method. WHAT WE CLAIM IS:
1. A method for the rapid sticking of paper, cardboard and plastics materials by applying a polyvinyl acetate glue, wherein a) a polyvinyl acetate glue modified so that it quickly responds to heat is applied to a surface of the material to be stuck, b) the material coated with glue is passed through a heating zone provided with mic rowave radiators, and then c) a substantially or completely glue-free material is applied to the glue-coated mat erial.
2. A method according to claim 1, wherein the polyvinyl acetate glue contains a plasticiser and/or a solvent.
3. A method according to claim 2, wherein phthalic acid and adipic acid esters or polyesters and/or alkyl or aryl or alkaryl phosphates are used as plasticiser.
4. A method according to claim 2 or 3, wherein a water-soluble organic polymer is used as solvent.
5. A method according to claim 4, wherein a Polyvinyl alcohol having a degree of hydrolysis of 80 to 100% is used as solvent.
6. A method according to claim 5, wherein the degree of hydrolysis is 85 to 89%.
7. A method according to claim 2 or 3, wherein an acetate and/or alcohol and/or a halogenated hydrocarbon is used as sol vent.
8. A method according to claim 7, wherein the acetate is ethyl, butyl or ethylene-glycol acetate, the alcohol is methanol, butanol or benzyl alcohol, and the halogenated hydrocarbon is methylene chloride.
9. A method according to any preced ing claim, wherein the glue comprises a solution or dispersion of a tackifying resin.
10. A method according to claim 9, wherein the tackifying resin is a derivative of colophony or a synthetic product based on an unsaturated aliphatic or aromatic hydrocarbon.
11. A method according to any preced ing claim, wherein the heating zone is in the the form of a heating channel provided with microwave radiators.
12. A method according to any preced ing claim, wherein hot air is blown into the heating zone.
13. A method according to claim 12, wherein the temperature of the hot air and the heat output from the microwave radiators are adjusted so that the tempera ture immediately in front of the surface to be glued is between 150 and 450"C.
14. A method according to claim 13, wherein the temperature is between 300 and 400"C.
15. A book or catalogue bound by using polyvinyl acetate glue, and which has been produced by applying a modified polyvinyl acetate glue that is rapidly heat
responsive to the surface of the material to be stuck, the material coated with glue having been passed through microwave heating zone, and a substantially or completely glue-free spine then having been applied and the book cover having been optionally cased.
16. A book or catalogue bound by the method of any of claims 1 to 14.
17. A package made of paper or cardboard, particularly a medicine package, and longitudinally glued by the method of any of claims 1 to 14.
18. A method for the rapid sticking of paper, cardboard and plastics materials substantially as herein described with reference to the accompanying drawings.
19. A book or catalogue produced substantially as herein described with reference to and as shown in the accompanying drawings.
GB14832/78A 1977-04-14 1978-04-14 Method for the rapid sticking of paper cardboard and plastics material Expired GB1570377A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2716575A DE2716575C3 (en) 1977-04-14 1977-04-14 Method for gluing book blocks and means for carrying out the method

Publications (1)

Publication Number Publication Date
GB1570377A true GB1570377A (en) 1980-07-02

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GB14832/78A Expired GB1570377A (en) 1977-04-14 1978-04-14 Method for the rapid sticking of paper cardboard and plastics material

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DE (1) DE2716575C3 (en)
FR (1) FR2387274A1 (en)
GB (1) GB1570377A (en)
IT (1) IT1094381B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1415789A1 (en) * 2002-10-31 2004-05-06 Hans Georg Schulz Method for welding plastic parts, in particular for connecting plastic parts along a weld line
WO2011110527A1 (en) * 2010-03-08 2011-09-15 Basf Se Microwave-activated adhesive compositions for producing collapsible box blanks

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3207885A1 (en) * 1982-03-05 1983-09-15 Hoechst Ag, 6230 Frankfurt PAPER BLOCK AND METHOD FOR THE PRODUCTION THEREOF
GB2197255B (en) * 1986-11-13 1990-07-11 Unibind Ltd Paper file for binding documents
US5702220A (en) * 1995-04-27 1997-12-30 Combs; Jeff Method and apparatus for elimination of adhesive stringers during perfect binding
US5672030A (en) * 1996-01-02 1997-09-30 Berryville Graphics Method of making books
DE102014213526A1 (en) * 2014-07-11 2016-01-14 Homag Holzbearbeitungssysteme Gmbh Device for heating a functional layer
DE102016221538A1 (en) * 2016-11-03 2018-05-03 Homag Gmbh Device for heating a functional layer
DE102018201088A1 (en) * 2018-01-24 2019-07-25 Homag Gmbh Applicator for activating a functional layer of a coating material

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH495225A (en) * 1968-11-07 1970-08-31 Wiles Engineering Ltd Seamless book binding process
DE2151600C2 (en) * 1971-10-16 1982-08-19 Rahdener Maschinenfabrik August Kolbus Gmbh & Co Kg, 4993 Rahden Hot-melt adhesive application in bookbinding - involves coating of book block front and rear end sheets and compression with book covers
DE2506079C3 (en) * 1975-02-13 1978-05-03 Reinhard Mohn Ohg, 4830 Guetersloh Process for producing adhesive bonds in bookbinding

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1415789A1 (en) * 2002-10-31 2004-05-06 Hans Georg Schulz Method for welding plastic parts, in particular for connecting plastic parts along a weld line
WO2011110527A1 (en) * 2010-03-08 2011-09-15 Basf Se Microwave-activated adhesive compositions for producing collapsible box blanks

Also Published As

Publication number Publication date
FR2387274A1 (en) 1978-11-10
DE2716575B2 (en) 1981-09-10
DE2716575A1 (en) 1978-10-19
IT7822342A0 (en) 1978-04-14
DE2716575C3 (en) 1982-07-15
IT1094381B (en) 1985-08-02
FR2387274B1 (en) 1982-11-19

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