Classifications

• • 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
  • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
• • 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
• • 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
  • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
• • 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
  • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
• • 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
  • B32B29/00—Layered products comprising a layer of paper or cardboard
  • B32B29/02—Layered products comprising a layer of paper or cardboard next to a fibrous or filamentary layer
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N5/00—Roofing materials comprising a fibrous web coated with bitumen or another polymer, e.g. pitch
• • 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
  • B32B2255/00—Coating on the layer surface
  • B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
• • 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
  • B32B2255/00—Coating on the layer surface
  • B32B2255/20—Inorganic coating
• • 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
  • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
  • B32B2262/02—Synthetic macromolecular fibres
  • B32B2262/0261—Polyamide fibres
• • 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
  • B32B2305/00—Condition, form or state of the layers or laminate
  • B32B2305/10—Fibres of continuous length
  • B32B2305/18—Fabrics, textiles
• • 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
  • B32B2307/7265—Non-permeable
• • 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
  • B32B2317/00—Animal or vegetable based
  • B32B2317/12—Paper, e.g. cardboard
• • 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
  • B32B2377/00—Polyamides
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24777—Edge feature
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31815—Of bituminous or tarry residue

Definitions

• ABSTRACT A method for the manufacture of wide sheets of water impermeable coating material useful in hydraulic engineering which comprises passing carrier sheet having a width in excess of 4 meters through a molten petroleum bitumen coating composition, coating said carrier sheet on both sides with said coating composition and placing the resultant coated sheet as soon as possible onto a conveyor belt while inserting between said coated sheet and said conveyor belt a surfacing material comprising one or more paper strips and a strip of plastic film easily removed from the coated carrier sheet after cooling in a manner such that the strip of plastic film forms a lateral boundary of the surfacing material.
• the invention relates to a method for the manufacture of broad sheets of coating material in which a carrier is passed through an impregnating composition, to broad sheets of coating material produced according to this method, and to the application thereof in hydraulic engineering.
• the conventional method for the production of roofing paper is a method in which a roll of paper 1 m wide is unrolled and passed through a bath of molten impregnating composition. To this end the sheet of paper first passes along a roller system comprising an upper roller conveyor and a lower roller conveyor of which. the upper roller conveyor is movable so that when a fresh sheet of paper is attached it is possible to continue impregnating by allowing the upper roller conveyor to descend.
• the sheet of paper is then preimpregnated and subsequently the sheet is passed through the bath of molten impregnating composition.
• the sheet of paper coated on both sides is passed between a number of sets of rollers in order to press the impregnating composition into the sheet of paper.
• the coated sheet of paper is then passed through a bath with molten coating composition (generally bitumen with filler) and subsequently brought to the desired thickness by passing the sheet between two adjustable rollers, after which the upper layer is coated with aggregate and led over a reversing roller as a result of which the aggregate-coated-layer lies underneath.
• molten coating composition generally bitumen with filler
• bitumen is used as impregnating composition for the production of asphalt paper, use is made of a bitumen of which the softening point, established by the Ring and Ball method, is 3555C and the penetration at 25C is 200-65 dmm.
• Sheets with a width from I to 2 m are too narrow for this purpose, since in view of the overlap of at least 30 cm a great many sheets would have to be laid and the same number of bonds would have to be made in order to be able to line the bottom of a basin or the slope of a dike. Moreover, each bond is a potential source of leakage and for this reason it is desirable to minimize the number of bond seams. There is therefore a need for broad sheets of coating material with a width in excess of 2m, preferably 4 m or more.
• the various roller systems which in that case must all have a width in excess of 2 m and preferably 4 m and more, become disproportionately expensive.
• the method described is therefore not suitable for the production of a carrier coated on each side with such compositions and with a width in excess of 2 m.
• the present invention relates to a method in which these carriers coated with such compositions can be produced in a simple manner with a width in excess of 2 m.
• the invention therefore relates to a method for the preparation of broad sheets of coating material in which a carrier is passed through a molten coating composition, characterized in that the carrier, coated on both sides with coating composition, is placed as soon as possible on to a conveyor belt, on which conveyor belt cooling takes place.
• Conveyor belts manufactured of material to which the coating composition does not adhere permanently are known.
• a conveyor belt may be used of which the carrying part consists of silicone rubber, or a conveyor belt of which the carrying part is formed of laminae consisting of or coated with Teflon (polytetrafluoroethylene).
• Teflon polytetrafluoroethylene
• the surfacing material may be, for example, a finegrained material such as sand, which is sprayed against the underside of the carrier coated with coating composition.
• a finegrained material such as sand
• Suitable surfacing material are paper sheets and/or plastics film.
• a plastics film e.g. a polyethylene film
• strips the other strip (strips) of surfacing material which need not be removed afterwards may advantageously consist of paper.
• surfacing material one or more paper strips and in-addition a strip of plastics film, which forms the lateral boundary of the surfacing material.
• This plastics film preferably has a width of 45-70 cm; for a polyethylene film a thickness of 0.05-O.l5 mm is very suitable.
• the sheet travelling with the conveyor belt is, preferably, coated with a coating material to allow for subsequent winding of the sheet on to reels.
• the coating material may be used in granular form or in the form of a strip, for example a membrane, a layer of felt, a fabric or a film. Functional considerations may also be taken into account in this respect, for example because it is desired to provide anti-corrosive properties, or a protection against mechanical damage, or because it is desired to produce a certain colour effect. For subsequent use as water-impermeable membrane it is preferred to use sand as coating material.
• a polyester film with a thickness of, for example, 0.025 mm is very suitable.
• This separate sheet may be applied internally or externally. Internal application has the advantage that this sheet cannot subsequently be easily damaged mechanically. it is therefore preferred to pass this sheet parallel to the carrier through the coating composition. if the plant-growth proof sheet is applied externally, it preferably also serves as coating material.
• a rot-proof strong carrier having good adhesive properties is obtained, for example, by using therefor a fabric produced from polyamide filaments, preferably a fabric with a tensile strength of 200-300 kg/S cm of test strip width and an elongation at break of 15-25%.
• the sheets of coating material preferably have a width of 4.5-5.5 m.
• the method according to the invention may be used for impregnating and coating of carriers with compositions of varying type, e.g. montan wax, rosin, petroleum bitumen and coal tar.
• compositions of varying type e.g. montan wax, rosin, petroleum bitumen and coal tar.
• petroleum bitumen is very suitable. It is permanently water-impermeable and proof against water of varying quality and is available in large quantities in any desired specification.
• a very suitable composition is one consisting of /45 bitumen (this is a blown bitumen with a softening point between 70C and C and a penetration between 40 and 50 dmm).
• the coating composition must meet varying requirements. In addition to adequate fluidity in the molten state at not excessively high temperature, the composition must be sufficiently flexible in the cooled state and display the minimum of flow. Petroleum bitumen, and in particular blown petroleum bitumen, meets these requirements in general, but if desired the rheological properties may be improved by the addition of a suitable component, for example a filler, an elastomer or a fibrous material. It is preferred to use asbestos fibre, which is suitably used in quantities of 3-8% by weight, based on the finished mixture. For use in a temperate climate, a mixture of 75/45 bitumen and 3-8% by weight of asbestos fibre, in particlar 45-55% by weight, is very suitable.
• the carrying layer, covered with coating composition is preferably first passed through a slit of which the width may be adjusted to the desired thickness of the coating material to be produced (e.g. l-20 mm), whereby the excess coating composition is scraped off and a smooth surface is obtained.
• a slit of which the width may be adjusted to the desired thickness of the coating material to be produced e.g. l-20 mm
• EXAMPLE A sheet of nylon with a width of 5 m and a tensile strength of 250 kg/S cm of trial strip width was passed through a composition consisting of a mixture of by weight of 75/45 bitumen and 5% by weight of shortfibred asbestos. This mixture had a temperature of C. At the same time three partly overlapping sheets of polyester film with a total width of 5 m and a thickness of 0.023 mm were passed through the bath and joined to the sheet of nylon fabric. These sheets were passed through the bath at a rate of 4 m/min. The combination of nylon fabric, polyester film and bitumen compound was passed out of the composition through a slit with a width of 5 mm.
• the resultant sheet was then placed on a 5.5 m wide conveyor belt, while between the resultant sheet and the conveyor belt three N partly overlapping strips of surfacing material were passed having a total width of 5 m, viz. two strips of 60 g kraft paper with a width of 2.50 m and a strip of 0.1 mm thick polyethylene film 65 cm in width, the strip of polyethylene film forming a marginal strip of the surfacing layer.
• the conveyor belt was built up of vertically standing, crenellate laminae which lie transverse to the direction of travel and are movable with respect to each other.
• the carrying part of the conveyor belt was 40 m in length.
• sand was sprinkled on the upper side of the sheet, travelling at a speed of 4 m/min.
• Halfway along the conveyor belt cooling air was blown over the sheet by means of two blowers arranged on either side of the conveyor belt.
• the cooled sheet was cut into 29 meter pieces and each piece was wound on to a reel and transported to the work.
• the work consisted of the application of a waterimpermeable lining to two excavated drinking water basins of which one had a depth of 21.5 m and a surface area of 105 hectares and the other a surface area of 219 hectares and a maximum depth of 23.5 in, against the penetration of ground water by means of laying a water-impermeable membrane on the slope of the dike and ballasting the membrane in order to prevent it from being forced up in the event of excess pressure of the ground water.
• This work was executed as follows. A reel of the obtained covering material was unrolled on the slope of the dike with the sand coated side towards the slope.
• the polyethylene film was removed and a second reel was unrolled in a similar manner with the strip of polyethylene film turned away from the sheet laid first, in such a way that the exposed bituminous layer of the first-laid sheet was just covered by the second sheet.
• the second sheet was bonded to the bit'uminous layer of the first layer be means of molten 75/45 bitumen. This procedure was repeated for each subsequent sheet. In this way the entire annular dike around the basin was provided over a slope length of 29 m with a water-impermeable membrane on the slope facing the basin. The membrane was then ballasted with sand.
• a method for the manufacture of wide sheets of water impermeable coating material useful in hydraulic engineering which comprises passing carrier sheet having a width in excess of 4 meters through a molten petroleum bitumen coating composition, coating said carrier sheet on both sides with said coating composition,
• a sheet of covering material obtained by means of the method of claim 1.
• a method for the manufacture of wide sheets of water impermeable coating material useful in hydraulic engineering which comprises passing a nylon fabric carrier sheet having a width of 4.5 to 5.5 meters, a tensile strength of 200-300 Kg per 5 cm test strip with an elongation at break of 15-25%, and one or more sheets of polyester film with a thickness of 0.01 to 0.03 mm, through a coating composition bath containing molten /45 bitumen having suspended therein 5% by weight of asbestos fiber, coating said sheets with the coating composition,
• a sheet of covering material obtained by means of the method of claim 10.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Laminated Bodies (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)

Applications Claiming Priority (1)

Publications (1)

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Family Applications (1)

Country Status (13)

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Citations (19)

Family Cites Families (3)

• 0
  • BE BE789730D patent/BE789730A/fr not_active IP Right Cessation
• 1971
  • 1971-10-07 NL NLAANVRAGE7113751,A patent/NL168757C/xx not_active IP Right Cessation
• 1972
  • 1972-10-03 US US294756A patent/US3922417A/en not_active Expired - Lifetime
  • 1972-10-04 GB GB4570072A patent/GB1392129A/en not_active Expired
  • 1972-10-05 IT IT30123/72A patent/IT968655B/it active
  • 1972-10-05 ES ES407336A patent/ES407336A1/es not_active Expired
  • 1972-10-05 FR FR7235331A patent/FR2156075B1/fr not_active Expired
  • 1972-10-05 IE IE1349/72A patent/IE36740B1/xx unknown
  • 1972-10-05 DE DE2248879A patent/DE2248879C2/de not_active Expired
  • 1972-10-05 CH CH1454272A patent/CH552414A/xx not_active IP Right Cessation
  • 1972-10-05 DK DK492172A patent/DK143839C/da active
  • 1972-10-05 ES ES407335A patent/ES407335A1/es not_active Expired
  • 1972-10-05 JP JP47099476A patent/JPS4845530A/ja active Pending
  • 1972-10-05 AT AT854872A patent/AT321096B/de not_active IP Right Cessation

Patent Citations (19)

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