Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/005—Synthetic yarns or filaments
  • D04H3/009—Condensation or reaction polymers
  • D04H3/011—Polyesters
• • 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
  • B28B7/00—Moulds; Cores; Mandrels
  • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
  • B28B7/368—Absorbent linings
• • 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
  • B28B7/00—Moulds; Cores; Mandrels
  • B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
  • B28B7/46—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for humidifying or dehumidifying
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
  • D04H1/542—Adhesive fibres
  • D04H1/544—Olefin series
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
  • D04H1/542—Adhesive fibres
  • D04H1/549—Polyamides
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
  • D04H1/542—Adhesive fibres
  • D04H1/55—Polyesters
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/005—Synthetic yarns or filaments
  • D04H3/007—Addition polymers
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/005—Synthetic yarns or filaments
  • D04H3/009—Condensation or reaction polymers
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
  • D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G9/00—Forming or shuttering elements for general use
  • E04G9/10—Forming or shuttering elements for general use with additional peculiarities such as surface shaping, insulating or heating, permeability to water or air
• • 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
  • Y10T428/249921—Web or sheet containing structurally defined element or component
  • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
  • Y10T428/249982—With component specified as adhesive or bonding agent
• • 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
  • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
  • Y10T428/268—Monolayer with structurally defined element

Definitions

• the present invention relates to a concrete mold intermediate layer and molds made therefrom for concrete production, which result in patterned or very smooth concrete surfaces.
• the concrete In the manufacture of concrete, it is usually cast using a concrete mold, the concrete taking the shape of the concrete mold.
• the wet concrete is poured into or onto the concrete mold, whereby after the concrete mold has hardened and removed, the newly exposed concrete surface represents a negative impression of the inner surface of the concrete mold.
• the concrete In the case of wooden forms, the concrete takes on the appearance of the wood grain. In the case of molds with hemmed form links, the concrete shows all the seams that are not sufficiently covered.
• the concrete mix also contains air. Both components (air and water) are useful to make the mixture flowable and to make handling and pouring easier.
• the fully hydrated concrete can bind about 40 wt .-% water, so that excess water remains in the concrete. After the concrete has dried out, this is responsible for the formation of so-called capillary pores.
• the air present in the concrete mixture can be at least largely removed by suitable compression measures. However, due to the different densities of the constituents (aggregates) of the concrete mix, the physical and chemical properties of the concrete change, so that in some cases an initial one Demixing of the concrete can be observed.
• the fresh concrete in the formwork contains more cement and water in the edge zone.
• This mixture which is rich in cement and water, is also known as concrete glue.
• the associated change in the water / cement value (W / Z value) compared to the core concrete results in a lower durability of the concrete surface.
• US-A-4 730 805 describes a concrete form using a beam and at least two layers of fabric on the beam.
• the girder can have lugs to spaced the fabric from the girder, the fabric layers and lugs helping drain the water from the hardening concrete.
• the wearer may have drainage holes to remove excess water and air.
• the fabric is bound to the support and is rigid and immovable relative to the support.
• EP-A-0 429 752 is a mold for patterned concrete with a support device, a grid with interconnected spacers, which form holes in the grid with a single area of at least 0.25 cm 2 , at least a part of which rests on the support device , and a porous, textile fabric, which is arranged next to the grid and is spaced from the carrier by the grid.
• the sheet generally has a pore size of 10 to 250 microns on each side so that a number of small concrete particles can penetrate and fill the open spaces of the sheet and allow excess water and air to pass therethrough.
• Fine concrete particles typically fill the larger pores of the fabric, especially when excessive concrete compaction occurs. If enough fine concrete particles have penetrated the structure of the fabric and there has been sufficient concrete hardening, it is usually very difficult or even impossible to detach the fabric from the hardened concrete. This takes place because the concrete particles that have penetrated into the fabric and hardened therein pull the fibers of the fabric out of its surface when the fabric is separated from the concrete. The problem is exacerbated when the sheet with loose surface fibers is reused because the loose fibers tend to be embedded in the hardened concrete, causing flaking of the sheet mat. The problem is aggravated if the sheet is not handled with care during assembly or disassembly of the form because mechanical friction (e.g. chafing) tends to make the sheet fluffy and cause the loose fibers to stick to the concrete. The multiple use of fabric shapes causes even more fabric pores to be clogged even more by fine concrete particles, which causes a greatly reduced removal of water and air.
• a concrete mold intermediate layer containing a porous, two-sided, textile fabric with a smooth and less smooth side is known.
• the pore size on the smooth side is between 0.2 - 10 ⁇ m, while the less smooth side has pores with a size between 10 - 250 ⁇ m.
• the smooth (first) side is produced either by a micro-foam coating or by fibers with a lower titer than the less smooth (second) side, and subsequent calendering.
• the latter option requires different titres (i.e. a titer gradient) in the textile fabric.
• the treatment for producing the smooth surface simultaneously stabilizes the textile fabric.
• the concrete mold intermediate layers described above can be implemented only with great effort, so that there was a need for further, easy to implement concrete mold intermediate layers.
• the complex stabilization of the intermediate concrete mold layer should be easily possible.
• fine-tufted nonwovens have a sufficient drainage effect for air and water and also have the required surface quality.
• the nonwovens can be constructed from fibers of finite length, so-called staple fiber nonwovens, or from fibers of infinite length, so-called spunbonded webs.
• the fibers are derived from any thermoplastic thread-forming polymer.
• melt-spinnable polymer materials are polyamides, such as e.g. Polyhexamethylene diadipamide, polycaprolactams, aromatic or partially aromatic polyamides ("aramids"), partially aromatic or fully aromatic polyesters, polyphenylene sulfide (PPS), polymers with ether and keto groups, such as e.g. Polyether ketones (PEK) and polyether ether ketones (PEEK), or polybenzimidazoles.
• PEK Polyether ketones
• PEEK polyether ether ketones
• melt-bond-strengthened spunbonded fabrics which are produced by randomly depositing freshly melt-spun filaments, are preferred. They usually consist of carrier and fusion binding fibers.
• the carrier and fusion binding fibers can be derived from any thermoplastic thread-forming polymer according to the requirements profile of the user.
• the proportion of the two types of fibers to one another can be chosen within wide limits, it being important to ensure that the proportion of the binding fibers is chosen so high that the nonwoven fabric is given sufficient strength and surface quality for the desired application by bonding the carrier fibers to the binding fibers.
• the proportion of the binder originating from the binding fiber in the nonwoven is usually less than 50% by weight, preferably 3 to 25% by weight, based on the weight of the nonwoven.
• the carrier fibers are melt-spinnable polymer materials, for example Polyamides, such as polyhexamethylene diadipamide, poly-caprolactam, aromatic or partially aromatic polyamides ("aramids”), partially aromatic or fully aromatic polyesters, polyphenylene sulfide (PPS), polymers with ether and keto groups, such as polyether ketones (PEK) and polyether ether ketones ( PEEK) or polybenzimidazoles.
• Polyamides such as polyhexamethylene diadipamide, poly-caprolactam, aromatic or partially aromatic polyamides (“aramids”), partially aromatic or fully aromatic polyesters, polyphenylene sulfide (PPS), polymers with ether and keto groups, such as polyether ketones (PEK) and polyether ether ketones ( PEEK) or polybenzimidazoles.
• PEK polyether ketones
• PEEK polyether ether ketones
• the carrier fibers preferably consist of melt-spinnable polyesters.
• polyester material consist predominantly of building blocks which are derived from aromatic dicarboxylic acids and from aliphatic diols.
• Common aromatic dicarboxylic acid building blocks are the divalent residues of benzenedicarboxylic acids, in particular terephthalic acid and isophthalic acid;
• Common diols have 2 to 4 carbon atoms, with the ethylene glycol being particularly suitable.
• Nonwovens made of a polyester material which consists of at least 85 mol% of polyethylene terephthalate are particularly advantageous.
• dicarboxylic acid units and glycol units which act as so-called modifying agents and which allow the person skilled in the art to specifically influence the physical and chemical properties of the filaments produced.
• dicarboxylic acid units are residues of isophthalic acid or of aliphatic dicarboxylic acid such as e.g. Glutaric acid, adipic acid, sebacic acid;
• modifying diol residues are those of longer-chain diols, e.g. of propanediol or butanediol, of di- or triethylene glycol or, if present in small quantities, of polyglycol with a molecular weight of approx. 500 to 2000.
• the polyesters contained in the nonwovens usually have a molecular weight corresponding to an intrinsic viscosity (IV) of 0.5 to 1.4 (dl / g), measured on solutions in dichloroacetic acid at 25 ° C.
• IV intrinsic viscosity
• Suitable melt binding fibers are all polymer materials with a melting point which is at least 1 ° C., preferably 10 to 50 ° C., particularly preferably 30 to 50 ° C., lower than the base fiber raw material. These are preferably modified polyester fibers or polyolefins such as polypropylene or polyethylene, polybutylene terephthalate or polyethylene terephthalate modified by condensing longer-chain diols and / or isophthalic acid or aliphatic dicarboxylic acids.
• the melt binders are preferably introduced into the nonwovens in the form of fibers (endless staple fibers or staple fibers).
• the individual fiber titers of the carrier fibers are 0.7 to 3 dtex, preferably 1 to 2.5 dtex.
• the individual fiber titer of the binding fibers is between 1 and 10 dtex, preferably 1 to 4 dtex. It is particularly advantageous if the binding fibers have the same titer as the carrier fibers.
• fibers can be used that combine carrier and binding properties. Examples of this are so-called heterofil and bicomponent fibers.
• spunbonded nonwovens are also those which are consolidated by a chemical binder, for example based on acrylate.
• spunbonded fabrics are thermally bonded spunbonded nonwovens.
• Such spunbonded webs usually do not contain any melt binders as described above and are only consolidated by the action of heat and / or pressure, for example calendering.
• the length of the staple fibers is not restricted in the case of the staple fiber nonwovens.
• the staple fiber nonwovens consist of the same polymer materials as the spunbonded fabrics described above. Suitable Staple fiber nonwovens are thermally bonded staper fiber nonwovens, ie those which are bonded by the action of heat and / or pressure, for example calendering.
• staple fiber nonwovens consolidated with binder are suitable, regardless of whether it is a melt binder in the above sense or a chemical binder, for example based on acrylate. It is essential that the staple fiber fleece has the required surface quality and mechanical properties.
• the nonwovens have basis weights of 50 to 300 g / m 2 , preferably 130 to 250 g / m 2 , in particular 140 to 170 g / m 2 .
• the carrier and fusion binding fibers preferably belong to a polymer class (e.g. polyester), so that the concrete mold intermediate layer according to the invention can be easily recycled.
• a polymer class e.g. polyester
• the nonwovens in particular the spunbonded nonwovens, are calendered after their production under the action of heat and pressure, so that the melt-binding fibers ensure sufficient consolidation of the nonwoven.
• the calender temperature is between 240 and 250 ° C; the calender pressure (line pressure) is between 135 and 145 daN.
• the calendering can produce an embossed pattern on at least one of the two sides of the fleece.
• the embossing is produced by means of a calender roll, the embossing depth of which is between 0.1 and 0.5 mm, preferably 0.2 to 0.3 mm.
• the line pressure is between 135 and 145 daN.
• the embossing pattern is preferably a canvas embossing pattern.
• the embossing area is between 40 and 50% (based on the surface of the corresponding side).
• the nonwoven can be made by suitable measures, for example mechanically by needling and / or pre-consolidated by means of fluid jets.
• the fleece has a maximum tensile force of at least 300 N, preferably at least 400 N, in particular at least 500 N, particularly preferably 400 N to 600 N (in the longitudinal direction) and at least 250 N, preferably at least 300 N, in particular at least 350 N, particularly preferably 300 N up to 500 N (in the transverse direction) measured on a 5 cm wide strip measured according to DIN EN 29073.3.
• the surface quality of the fleece corresponds to a pore size (cross section) of 1 to 80 ⁇ m, preferably 5 to 60 ⁇ m, determined by means of a Coulter porometer in porofil.
• the fleece has an air permeability of up to 250 l / m 2 s at 200 Pa (determined according to DIN 53887) and a water resistance of 40 to 300 mm water column (determined according to DIN 53886).
• Nonwovens which have a combination of preferred features are also particularly preferred.
• the fibers or staple fibers that make up the nonwovens can have a practically round cross section or can also have other shapes, such as dumbbell, kidney-shaped, triangular or tri or multilobal cross sections. Hollow fibers can also be used. Round to oval fiber cross sections are preferred.
• the binding fiber can also be used in the form of bicomponent or multicomponent fibers, oval to round cross sections leading to improved fiber integration and thus better surface quality.
• the fibers forming the fleece can be modified by conventional additives, for example by antistatic agents such as carbon black.
• the concrete mold intermediate layer according to the invention is equipped with fluorine-containing polymers to increase the hydrophobicity, so that the detachment of the concrete mold intermediate layer from the hardened concrete is promoted.
• fluorine-containing polymers to increase the hydrophobicity, so that the detachment of the concrete mold intermediate layer from the hardened concrete is promoted.
• a suitable hydrophobizing agent is the product commercially available under the name ®Nuva (Hoechst AG, Germany).
• the nonwovens according to the invention are of high mechanical strength and can therefore be exposed to high loads. These tensile forces, which occur in particular when the intermediate concrete form liner is tensioned, can lead to the formation of cracks, so that at least a partial destruction of the intermediate liner form is to be feared. Furthermore, the high mechanical strength is favorable, since high tensile forces are necessary when tensioning the concrete mold intermediate layer to ensure a wrinkle-free surface.
• a preferred form of nonwoven formation according to measure a) is spunbond formation with simultaneous formation of the melt binding fibers.
• the calendering described in b) takes place at temperatures between 240 and 250 ° C and a calender pressure of 135 to 145 daN (line pressure).
• An embossing pattern preferably a canvas embossing pattern, can be generated at the same time.
• the nonwoven is a spunbonded nonwoven bonded with melt binder
• a final consolidation is carried out by melting the binder fibers, for example in a forced air oven.
• the nonwoven is consolidated with a chemical binder, this is usually applied after step b) and the nonwoven is then subjected to a thermal aftertreatment, so that the binder cures.
• Another object of the present invention is the use of the concrete mold intermediate layer according to the invention for producing a concrete mold, which is also the subject of the present invention.
• a method of making the improved shape by forming a beam with the shape desired for a concrete article to be made, attaching a mesh to the beam (a), the mesh having spacers connected together, at least a portion of which are on Carrier (a) rests, and adjoining a spunbond (c) together with the grid (b), the spunbond (c) being held at a distance from the carrier a) by the grid (b).
• the method may further comprise uniformly stretching the spunbonded web (c) over the grid (b) with a tension of 0.2 to 3.0 kg per running centimeter, and is thus also for producing a concrete mold for concrete with a smooth surface , which is also the subject of the invention.
• the method of the present invention also includes forming a support device (a) with holes and arranging the spunbonded fabric (c) adjacent to the support device (a) so that the grid (b) can be omitted if necessary.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Mechanical Engineering (AREA)
• Architecture (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Manufacturing & Machinery (AREA)
• Ceramic Engineering (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Nonwoven Fabrics (AREA)
• Moulds, Cores, Or Mandrels (AREA)
• Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=7796845

Family Applications (1)

Country Status (4)

Cited By (1)

Families Citing this family (6)

Family Cites Families (9)

• 1996
  • 1996-06-13 DE DE1996123584 patent/DE19623584B4/de not_active Expired - Lifetime
• 1997
  • 1997-05-30 EP EP19970108682 patent/EP0812943A3/fr not_active Withdrawn
  • 1997-06-11 TR TR97/00491A patent/TR199700491A2/xx unknown
  • 1997-06-12 US US08/873,732 patent/US5820775A/en not_active Expired - Lifetime

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