EP0116027A2 - Mehrschichtige Überziehung für Gegenstand aus Asbestzement - Google Patents

Mehrschichtige Überziehung für Gegenstand aus Asbestzement Download PDF

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Publication number
EP0116027A2
EP0116027A2 EP84870014A EP84870014A EP0116027A2 EP 0116027 A2 EP0116027 A2 EP 0116027A2 EP 84870014 A EP84870014 A EP 84870014A EP 84870014 A EP84870014 A EP 84870014A EP 0116027 A2 EP0116027 A2 EP 0116027A2
Authority
EP
European Patent Office
Prior art keywords
mentioned
structured coating
coating
asbestos
natural
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Withdrawn
Application number
EP84870014A
Other languages
English (en)
French (fr)
Other versions
EP0116027A3 (de
Inventor
Georges Jacobs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Johns Manville NV SA
Original Assignee
Johns Manville NV SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from BE0/210045A external-priority patent/BE895804A/nl
Application filed by Johns Manville NV SA filed Critical Johns Manville NV SA
Publication of EP0116027A2 publication Critical patent/EP0116027A2/de
Publication of EP0116027A3 publication Critical patent/EP0116027A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon

Definitions

  • the present invention relates to a method for at least partially covering a face of an object of monolithic or laminated structure based on hydraulic binders reinforced with natural or artificial mineral fibers.
  • Asbestos cement and fiber cement prepared on the basis of other natural or artificial mineral fibers are widely used in the manufacture of objects in the most varied forms, intended for construction and exterior ornamentation.
  • objects are, for example, flat and wavy plates, slates, slabs, decorative panels, conduits, pipes and flowerpots.
  • mineral fibers such as asbestos fibers or ceramic fibers are incorporated into cement in an amount of 10 to 15% by mass, so as to obtain a fluid paste.
  • this dough is brought in by an endless felt band which moves in front of a vacuum box, on a cylinder on which it is rolled up in very thin layers.
  • a malleable plate is obtained by cutting, to which various shapes are printed by molding in a press or by hand.
  • Another known method consists in injecting into molds a fluid paste of asbestos-cement in order to obtain various shapes.
  • the covering layer comprises approximately thirty microns. Such a thickness does not make it possible to obtain lasting protection, since this layer risks eroding quickly.
  • natural or artificial mineral fibers in particular asbestos, glass, volcanic rock or other fibers, constitute a nuisance in the free state and in suspension in the air.
  • the object of the present invention is to prevent the release by erosion of mineral fibers contained in the objects based on the above-mentioned binders, whether these are formed in press, in calendering machine or in molds.
  • It relates to a method for covering at least one face or part of a face with a laminated structure object based on mineral binders reinforced with natural or artificial mineral fibers, this method being essentially characterized in that a structured coating is applied consisting of the above-mentioned mineral binders, this time armed with natural or synthetic organic fibers on the core of the above-mentioned object.
  • the above-mentioned structured coating is applied by spraying with a mill or spraying with a spray gun onto a possibly wet surface.
  • the above-mentioned structured coating is applied by winding on the aforementioned cylinder at least a first layer and / or at least one last thin layer of a binder reinforced with natural or synthetic organic fibers.
  • the forming machine used for the manufacture of a fiber cement plate designated as a whole by the reference notation 1 comprises an endless belt 2 of a felt filter.
  • This strip 2 is driven in the direction of arrow X by rollers 3 in front of a vacuum box 4.
  • a device 5 comprising an applicator roller 6 suspended from a fork 6 'mounted on an axis 6 "and at least one jack 7 allows distributing in a thin layer 8 the fiber cement dough 9 on the cake 10 which covers the above-mentioned felt 2.
  • the spacing 11 of the applicator roller 6 determines the thickness of the dough film entrained by the felt 2.
  • the drying takes place by suction of part of the mixing water through the felt 2 using the vacuum box 4, the cake 10 composed of asbestos-reinforced mineral binders and constituting a thin layer of fiber cement is detached from the felt 2 and is wound up, in superimposed thin layers, on a forming drum 12 applied against the aforementioned felt 2.
  • the roll of dough wound on the forming drum 12 reaches a sufficient thickness, it is cut and the plate obtained is shaped.
  • the thickness of this cylinder therefore determines that of the core of the object to be manufactured. It corresponds to the number of layers superimposed on the forming drum 12 and their thickness.
  • the applicator roller 6 is pressed on the cake 10 adhering to the endless felt strip 2, so as to eliminate, at least in part, the latter.
  • the space 13 formed between the felt strip 2 and the applicator roller 6 is supplied with paste 9 of fiber cement reinforced with natural or synthetic organic fibers and the spacing between the above strip 2 and the roller 6 is chosen, so as to apply a coating film of a hundred microns.
  • This film reinforced with organic fibers is wound in its turn on the cylindrical envelope generated by the drum 12 of the forming machine and made up of thin layers of aforementioned fiber cement paste, armed with more or less harmful mineral fibers.
  • a cylindrical envelope is thus obtained, the periphery of which is covered with a structured coating reinforced with absolutely harmless organic fibers 14.
  • a coating thickness 14 of approximately 500 microns already provides protection deemed sufficiently durable.
  • the organo-mineral protective layer will itself undergo erosion due to atmospheric conditions or the friction of any objects, releasing only harmless organic fibers.
  • This type of above-mentioned structured coating therefore applies in particular to the external covering of flower tubs, basins, vases intended to contain water or moist soil, possibly enriched with fertilizers and / or organic foods.
  • the organic fibers which can be taken into account for the preparation of a fribrocement are the following: polypropylene, cellulose, wood fibers, polyethylene, polyacrylonitrile, sisal, polyamide, polyester, cotton, dralon, perlon, nylon, viscose, kraft , coconut, sugar cane, musamba, bagasse, bamboo, jute, okwara and plantain ...
  • the structured coating according to the invention is, by its composition, relatively inexpensive. Thanks to its excellent adhesion, it allows it to be used for the protection and decoration of exterior building elements, made of cement or fiber cement reinforced with mineral fibers.
  • the application of the structured fibrous coating can be carried out by all known methods: spraying in a mill, spraying with an air or air gun, with a roller or a pad, etc.
  • the fibrous coating can be applied with the same success on a wet support. or dry and has the advantage of not cracking on drying even when forced in the drying oven.
  • a special composition of the fibrous coating can easily be produced for the autoclaving at high vapor pressure of the products to which it has been applied.
  • the following fibrous structured coating is prepared by mixing the ingredients in a suitable mixer fitted with a rapid stirrer.
  • a mixture allowing the remarkable advantages of the process of the invention to be obtained advantageously has a The following weight composition expressed as a percentage:
  • the asbestos-free coating layer 14 instead of applying the asbestos-free coating layer 14 to the felt 2 only at the end of the operation, it can also be applied at the start of the operation or at the start and at the end of to protect the interior and exterior surfaces of the object.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Aftertreatments Of Artificial And Natural Stones (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
EP84870014A 1983-02-03 1984-02-02 Mehrschichtige Überziehung für Gegenstand aus Asbestzement Withdrawn EP0116027A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE210045 1983-02-03
BE0/210045A BE895804A (nl) 1983-02-03 1983-02-03 Vezelachtige bescherm- of bovenlaag van voorwerpen uit materiaal versterkt met minerale natuur- of kunstvezels

Publications (2)

Publication Number Publication Date
EP0116027A2 true EP0116027A2 (de) 1984-08-15
EP0116027A3 EP0116027A3 (de) 1986-01-15

Family

ID=3843599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84870014A Withdrawn EP0116027A3 (de) 1983-02-03 1984-02-02 Mehrschichtige Überziehung für Gegenstand aus Asbestzement

Country Status (1)

Country Link
EP (1) EP0116027A3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994025234A1 (de) * 1993-04-29 1994-11-10 Eternit-Werke Ludwig Hatschek Aktiengesellschaft Verfahren und anlagen zur herstellung von aus fasern und hydraulischem bindemittel bestehenden produkten

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE375800A (de) *
US1941985A (en) * 1929-06-18 1934-01-02 Fiberfraks Inc Composite sheeting
DE2344072A1 (de) * 1973-08-31 1975-06-05 Frenzelit Asbestwerk Brand- und wetterbestaendige fassadenplatte

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE375800A (de) *
US1941985A (en) * 1929-06-18 1934-01-02 Fiberfraks Inc Composite sheeting
DE2344072A1 (de) * 1973-08-31 1975-06-05 Frenzelit Asbestwerk Brand- und wetterbestaendige fassadenplatte

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994025234A1 (de) * 1993-04-29 1994-11-10 Eternit-Werke Ludwig Hatschek Aktiengesellschaft Verfahren und anlagen zur herstellung von aus fasern und hydraulischem bindemittel bestehenden produkten

Also Published As

Publication number Publication date
EP0116027A3 (de) 1986-01-15

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Inventor name: JACOBS, GEORGES