DK169950B1

DK169950B1 - Process for the preparation of lightweight, binder-free and environmentally friendly moldings of lignocellulosic material

Info

Publication number: DK169950B1
Application number: DK253687A
Authority: DK
Inventors: Peter Grohmann; Rubin Eisenstein; Gerhard Gehring
Original assignee: Peter Grohmann
Priority date: 1986-05-20
Filing date: 1987-05-19
Publication date: 1995-04-10
Also published as: DE3616885A1; DK253687D0; EP0246588B1; EP0246588A1; DE3616885C2; DE3616885C3; ATE67255T1; DE3772841D1; DK253687A

Abstract

In this procedure, a greater part of the ligno-cellulose-containing material is comminuted dry or wet, wet-mixed with the lesser part of a defibred ligno-cellulose-containing material, the mixture moulded and finally dried. The moulded bodies thus produced are suitable for bindery requirements, as packaging units, for the building industry and in the furniture field.

Description

DK 169950 B1 iDK 169950 B1 i

Den foreliggende opfindelse angår en fremgangsmåde til fremstilling af lette, bindemiddelfri og miljøvenlige formlegemer af lignocelluloseholdigt materiale. Sådanne 5 formlegemer kan anvendes til binderiformål, f.eks. til fremstilling af kranse, kugler, kors, puder og lignende, til binding af kranse, f.eks. kirkegårds- og adventskranse osv. Endvidere kan sådanne formlegemer anvendes i emballeringsindustrien. Desuden kan man ud fra sådanne formlege-10 mer fremstille møbeldele, især møbeldele med speciel form og i vilkårlig tredimensionel form ved et vist indre tværsnit. Endelig kan formlegemerne også anvendes inden for byggeområdet, eksempelvis i form af isoleringsflader, byggeplader og lignende.The present invention relates to a process for the preparation of lightweight, binder-free and environmentally friendly moldings of lignocellulosic material. Such 5 mold bodies can be used for binder form purposes, e.g. for making wreaths, balls, crosses, pillows and the like, for bonding wreaths, e.g. cemeteries and advent wreaths etc. Furthermore, such moldings can be used in the packaging industry. In addition, from such mold bodies one can make furniture parts, especially furniture parts of special shape and in any three-dimensional shape at a certain internal cross-section. Finally, the moldings can also be used in the construction area, for example in the form of insulating surfaces, building boards and the like.

15 Sådanne formdele fremstilles ofte af et kunstskumstof, f.eks. af et hårdt skumstof. Det er således kendt at anvende ringe af "styropor" til binding af kranse, dette skumstof avendes også til emballage og i byggematerialeindustrien.Such mold parts are often made of an artificial foam, e.g. of a hard foam. Thus it is known to use rings of "styrofoam" for bonding wreaths, this foam material is also used for packaging and in the building materials industry.

20 Ved disse kendte formlegemer er bortskaffelsen af affald et problem. De kendte formlegemer kan praktisk taget ikke nedbrydes, og de rådner heller ikke. På den anden side optager de et væsentligt rumfang. Endvidere er brandforholdene problematiske. Hvis de skal bortskaffes som 25 affald ved forbrænding, dannes der ved forbrændingen skadelige stoffer. Det samme problem optræder også, når de kendte formlegemer forbrændes utilsigtet eller på et uegnet sted.20 In these known mold bodies, the disposal of waste is a problem. The known mold bodies cannot practically decompose, nor do they rot. On the other hand, they occupy a substantial volume. Furthermore, the fire conditions are problematic. If they are to be disposed of as 25 waste by incineration, harmful substances are formed during incineration. The same problem also occurs when the known mold bodies are burned inadvertently or in an unsuitable place.

Ved formlegemer til binderiformål påbindes planter og 30 andre pyntedele ved hjælp af en tråd eller en snor, men i et vist omfang stikkes de også ind i formdelen. Formdelene må derfor på den ene side have tilstrækkelig styrke til at kunne håndteres, men på den anden side skal fastgørelsesklemmer, kviste og lignende uden vanskeligheder kunne ind-35 trykkes manuelt og uden anvendelse af værktøj. Det skal 2 DK 169950 B1 således eksempelvis være muligt at indstikke en kvist i formlegemet.For binder mold purposes, plants and 30 other ornaments are bonded using a thread or string, but to a certain extent they are also inserted into the mold member. The mold parts must therefore, on the one hand, have sufficient strength to be handled, but on the other hand fastening clamps, twigs and the like must be able to be pressed manually without difficulty and without the use of tools. For example, it should be possible, for example, to insert a twig into the mold body.

Ved møbler skal formlegemer kunne udvise en vilkårlig form 5 og have en til anvendelsen tilstrækkelig styrke. Deres ^ overflader kan forarbejdes i en vilkårlig form, eksempelvis ved påføring af et kunststoflag, en lak eller lignende, hvorved overfladerne beskyttes mod mekaniske påvirkninger.In furniture, mold bodies must be able to exhibit any shape 5 and have a strength sufficient for use. Their surfaces can be processed in any shape, for example by applying a plastic layer, a varnish or the like, thereby protecting the surfaces from mechanical stresses.

10 Ved emballagemateriale er det ønskeligt, at det på den ene side er temmelig let, altså har en lav vægtfylde og således ikke bidrager væsentligt til fragtomkostningerne, men på den anden side er billigt at fremstille, har en tilstrækkelig mekanisk stabilitet til at beskytte de emballe-15 rede varer og er enkelt og problemløst at skaffe af vejen. Netop det sidstnævnte krav har afgørende betydning ved emballeringsmateriale, da sådanne formlegemer sædvanligvis har en til produktet, som skal emballeres, meget speciel tilpasset form, således at det efter anvendelse 20 til emballeringsformål i grunden ikke længere kan avendes til andre formål og derfor på en eller anden måde skal destrueres.10 In the case of packaging material, it is desirable that on the one hand it is rather light, that is, has a low density and thus does not contribute significantly to the shipping costs, but on the other hand is cheap to manufacture, has sufficient mechanical stability to protect the packaging. -15 ready goods and is easy and trouble-free to get out of the way. Precisely the latter requirement is of paramount importance in packaging material, since such moldings usually have a very specially adapted shape for the product to be packaged, so that after use 20 for packaging purposes it can no longer be disposed of for other purposes and therefore for one or more purposes. another way must be destroyed.

Fra DE-patentskrift nr. 898.964 kendes en fremgangsmåde til fremstilling af lette byggematerialer af træaffald med 25 lav rumvægt. Ved sammenfiltring i rå tilstand af lange træfibre, der eksempelvis dannes ved defibrering af kløvestykker, opnås under opslæmning i vand og aflejring eller frasugning fra en vandig grød et skind. Sådanne skind har dog høj rumvægt eller udtrykt på anden måde for * 30 lav porøsitet.DE-patent specification 898,964 discloses a method for the production of lightweight building materials of low-weight wood waste. By raw entanglement of long wood fibers formed, for example, by defibrating splits, during slurry in water and deposition or suction from an aqueous porridge, a skin is obtained. However, such skins have high bulk or otherwise expressed for * 30 low porosity.

Fra DE-patentskrift nr. 650.040 kendes en fremgangsmåde til fremstilling af legemer af fiberstofblåndinger, ved hvilken der ud fra svagt træagtige plantefibre, f.eks. strå, ved kogning med alkalimetalmonosulfiter dannes en 3 DK 169950 B1 cellulose, der blandes med en blanding af mekanisk svagt forarbejdet og mekanisk sønderdelt træ. Heller ikke denne fremgangsmåde fører til tilfredsstillende produkter.DE patent specification No. 650,040 discloses a method for producing bodies of fibrous blends in which, based on weak woody plant fibers, e.g. straw, when boiling with alkali metal monosulfites, a cellulose is formed which is mixed with a mixture of mechanically poorly processed and mechanically decomposed wood. Neither does this approach lead to satisfactory products.

5 Fra DE-B-1.060.179 kendes underlag til indstikningsblomster, der består af en masse af halmfibre eller halmflor, en tilsætning af cellulose og et bindemiddel og er imprægneret med et vandafvisende stof. Derved forarbejdes halmen til halmfibre, til forøgelse af styrken tilsættes 10 indtil 10% cellulose, hvorefter der affugtes groft og tilsættes et egnet bindemiddel. Denne, med bindemiddel forsynede masse presses til underlag i forme. De pressede formdele tørres derefter. De således fremkomne produkter er alt for hårde og ikke gode at stikke i, og de har 15 derfor ikke stået deres prøve i praksis.From DE-B-1,060,179, substrates are known for embossing flowers consisting of a mass of straw fiber or straw flora, an addition of cellulose and a binder and impregnated with a water repellent fabric. Thereby, the straw is processed into straw fibers, to increase the strength, 10 to 10% cellulose is added, after which coarse dehumidifier is added and a suitable binder is added. This binder-packed mass is pressed into the molds. The pressed mold parts are then dried. The products thus obtained are too hard and not good to stick in, and they have therefore not been tested in practice.

Fra AT-B-170.271 kendes en fremgangsmåde til fremstilling af bindemiddelfrie formlegemer af fibermateriale, hvorved der af etårige planter udvindes to forskellige produkter: en del, der skal bestå af bedst muligt bevarede fiber-20 bundter og tjener som skeletsubstans, og en anden del, der er vidtgående hydratiseret, således at den virker som bindesubstans. Der er således tale om at produkt, der i mange henseender svarer til produktet ifølge det allerede omtalte DE-B-1.060.179. Selv den som skeletsubstans 25 tjenende del af de etårige planter findeles væsentligt kraftigere end halmhakkelsen. Som finfibret komponent og bindemiddel tjener den anden, vidtgående hydratiserede, pentoserige andel af disse etårige planter. Blandingerne efterbehandles ved høje temperaturer, hvorved pentoserne, 30 hexoserne, lignin og nedbrydningsprodukter kondenserer og dermed virker som et bindemiddel. Behandlingen ved høje temperaturer finder desuden også sted ved høje tryk, således at der til slut dannes tilstrækkeligt vandfaste, mekanisk faste fiberplader, der ikke kaster sig og har høj 35 stabilitet (eks. 1), eller endog møbeltræerstatningsplader med høj tæthed, der kan høvles, fræses, bores og 4 DK 169950 B1 sømmes og kan limes og kittes med furanharpikser.From AT-B-170,271 there is known a process for the preparation of binder-free moldings of fibrous material, whereby two different products are extracted from annual plants: one part consisting of the best preserved fiber bundles and serving as skeletal substance, and another part which is extensively hydrated so that it acts as a binding substance. It is thus a product that in many respects corresponds to the product according to the already mentioned DE-B-1,060,179. Even the part of the annual plants serving as a skeletal substance 25 is comminuted substantially more strongly than the straw chopping. As a fine-grained component and binder, the second, extensively hydrated, pentose-rich portion of these one-year plants serves. The mixtures are post-treated at high temperatures whereby the pentoses, hexoses, lignin and degradation products condense and thus act as a binder. In addition, the treatment at high temperatures also takes place at high pressures, so that finally, sufficiently water-resistant, mechanically solid non-folding non-folding and high stability (ex. 1) or even high-density furniture wooden replacement plates can be formed. , are milled, drilled and 4 DK 169950 B1 seamed and can be glued and putty with furan resins.

Af sammenligningsforsøget på side 2, linie 53-64, fremgår ^ endog, at der uden den særlige oplukning af en del af 5 materialet kun sker en dehydratisering og forhorning af overfladen, uden at der dannes stabile produkter.From the comparative experiment on page 2, lines 53-64, it is even apparent that without the special opening of part of the material, only dehydration and hardening of the surface occurs without stable products being formed.

Problemet med fremstillingen af formlegemer af den ovenfor omtalte type består i det væsentlige i afvandingen af de til dels ret tykke formlegemer umiddelbart efter deres 10 fremstilling. Afvandingsprocessen skal helst gennemføres uden mekaniske hjælpemidler, f.eks. sugemaskiner, og især kun kræve kort tid, f.eks. mindre end en dag. Længere tørringstider medfører forøgede produktionsomkostninger.The problem with the production of mold bodies of the type mentioned above is essentially in the dewatering of the partially thick mold bodies immediately after their manufacture. The dewatering process should preferably be carried out without mechanical aids, e.g. suction machines, and in particular require only a short time, e.g. less than a day. Longer drying times result in increased production costs.

Det er formålet med opfindelsen at tilvejebringe en frem-15 gangsmåde til fremstilling af formlegemer af den ovenfor anførte type, som ikke er forbundet med ulemperne ved de kendte fremgangsmåder, og som gør det muligt at fremstille formlegemer, som på den ene side har tilstrækkelig styrke og vilkårlig materialetykkelse, og på den anden side kan 20 afvandes tilstrækkeligt hurtigt, og som tillige er miljøvenlige ved fjernelse som affald.SUMMARY OF THE INVENTION It is an object of the invention to provide a method for producing mold bodies of the above type which are not associated with the disadvantages of the known methods and which enable mold bodies which on one hand have sufficient strength to be manufactured. and arbitrary material thickness and, on the other hand, 20 can be drained sufficiently quickly and which are also environmentally friendly when removed as waste.

Dette opnås ifølge opfindelsen ved den i krav 1 anførte fremgangsmåde.This is achieved according to the invention by the method of claim 1.

Formlegemer til binderiformål fremstillet ifølge denne 25 fremgangsmåde kan brændes problemfrit, især sammen med det grønt- og blomsterpynt, som findes på formlegemerne. Der kan fremstilles formlegemer af en vilkårlig størrelse og form på billig måde, og ved hjælp af findelingsgraden af hovedbestanddelen af det lignocelluloseholdige materialer ^ 30 indstilles materialets porøsitet. Porøsiteten vælges således, at formlegemet har små gennemgående kanaler, dvs. er luftgennemtrængeligt. Kanalerne tjener til en hurtigst mulig fjernelse af det ved fremstillingen frem- 5 DK 169950 B1 komne vand og således til en hurtig tørring. Formlegemets mekaniske stabilitet bstemmes af kvaliteten af det defi-brerede lignocelluloseholdige materiale og findelings-5 graden af hovedbestanddelen. Jo højere rivestyrke det defibrerede materialer har, desto bedre er dets klæbeevne, og desto bedre er således produktets styrke. Formlegemets vægtfylde er desto større, jo mindre hoveddelen er findelt, f.eks. hakket eller formalet i en kuglemølle, og jo 10 dårligere er kvaliteten af det anvendte defibrerede materiale. Letvægtsformlegemer kan således fremstilles ved, at man dels anvender et defibreret materiale med stor brudlængde, f.eks. 10.000 m svarende til 10 cN/tex, dels ikke findeler hoveddelen for kraftigt. Den mekaniske 15 styrke skal dog være tilstrækkelig stor.Binder molds made according to this method can be burnt seamlessly, especially with the green and flower embellishments found on the moldings. Molding bodies of any size and shape can be prepared in a cheap manner, and by means of the degree of comminution of the main constituent of the lignocellulosic materials, the porosity of the material is adjusted. The porosity is chosen such that the mold body has small through-going channels, i.e. is air permeable. The ducts serve for the quickest possible removal of the water produced in the preparation and thus for a quick drying. The mechanical stability of the mold body is compromised by the quality of the defined lignocellulosic material and the degree of comminution of the main constituent. The higher the tear strength of the defibrated materials, the better its adhesiveness and thus the better the strength of the product. The density of the mold body is the greater the smaller the body part is divided, e.g. chopped or ground in a ball mill, and the worse the quality of the defibrated material used. Thus, lightweight mold bodies can be made by partly using a deflated material of high fracture length, e.g. 10,000 m, equivalent to 10 cN / tex, and partly does not sharpen the main body too heavily. However, the mechanical strength must be sufficiently large.

Formlegemerne har typisk en vægtfylde på 0,12-0,14 g pr. m3, men det er ikke vanskeligt at fremstille formlegemer med større rumvægt. Ved formlegemer til binderiformål, hvori der skal kunne stikkes pyntegenstande, og hvor der 20 ikke stilles store krav til den mekaniske styrke, udgør mængden af hoveddelen lignocelluloseholdigt materiale typisk 80%, og mængden af defibreret materiale 20%. Et formlegeme, som ligeledes har lav rumvægt, opnås ved et blandingsforhold på 80% hoveddel og 30% defibreret 25 materiale. Når der kræves større styrker kan forholdet mellem de to dele forskydes til 50:50. Der kan også opnås høj styrke, ved at man presser formlegemet umiddelbart efter fyldningen af formen, f.eks. formindsker dens rumfang til 1/3 af det oprindelige rumfang. En tørring ved 30 120-150°C forøger formlegemets styrke.Typically, the molding bodies have a density of 0.12-0.14 g per liter. m3, but it is not difficult to produce larger body weight moldings. In the case of bindery molds in which decorative objects can be inserted and where there are no high demands on mechanical strength, the amount of the lignocellulosic material containing the body is typically 80% and the amount of defibrated material 20%. A mold body which also has a low bulk weight is obtained at a mixing ratio of 80% body and 30% defibrated material. When larger forces are required, the ratio of the two parts can be shifted to 50:50. High strength can also be obtained by pressing the mold body immediately after filling the mold, e.g. decreases its volume to 1/3 of the original volume. Drying at 120-120 ° C increases the strength of the mold body.

Især ved store formlegemer, men også ved formlegemer, som skal have stor styrke, f.eks. til møbelindustrien, kan det være hensigtsmæssigt at forøge formstabiliteten ved en lagvis opbygning. En sideflade kan være dannet udeluk-35 kende af fiberstof, f.eks. fyldes bunden af en form med fiberstof i ringe lagtykkelse, hvorpå blandingen ifølge v 6 DK 169950 B1 opfindelsen påføres under sugning. Der skal drages omsorg for, at der er tilstrækkelig mulighed for at vandet kan løbe bort. Til binderiformål kan der kun indstikkes pyn-5 tedele i en sådan formdel fra den ene side, men ved den lagvise opbygning opnås imidlertid en større stabilitet. *Especially for large molds, but also for molds which must have high strength, e.g. For the furniture industry, it may be appropriate to increase the shape stability of a layered structure. A side surface may be formed solely of fibrous material, e.g. The bottom of a mold is filled with a low-thickness fiber fabric, and the suction according to the invention is applied during suction. Care must be taken to ensure that there is sufficient opportunity for the water to run off. For bindery purposes, only decorative parts can be inserted into such a molding from one side, but the layered structure, however, achieves greater stability. *

Det kan også være meget fordelagtigt at udforme mellemlagene i det indre af formlegemet, især ved byggeplader er det en fordel at danne overfladelagene af et relativt 10 godt materiale, f.eks. af fiberstof, hvorimod de indre lag, som udgør størsteparten af materialets tykkelse, dannes af en blanding, som indeholder en mindst mulig mængde af defibreret materiale.It can also be very advantageous to design the intermediate layers in the interior of the mold body, especially at building boards it is advantageous to form the surface layers of a relatively good material, e.g. of fibrous fabric, whereas the inner layers which make up most of the thickness of the material are formed by a mixture containing the least amount of defibrated material.

Ved fremstillingen af et formlegeme til binderiformål 15 hakkes halmhakkelse enten tørt eller vådt, fortrinsvis til en længde på 5 mm. Fiberstoffet kan udvindes fra stråhakkelsen ved oplukning med natriumhydroxidopløsning og efterfølgende defibrering i en defibrator eller refiner, eller der kan anvendes træfiberstof, træslib 20 eller oplukket genbrugspapir. Ved cellulose af god kvalitet (brudlængde 10.000 m svarende til 10 cN/tex) er det tilstrækkeligt at tilblande 20% fiberstof, hvorimod der ved cellulose af ringere kvalitet, f.eks. fra genbrugspapir, med en brudlængde på ca. 3.000 m svarende 25 til 3 cN/tex, skal anvendes den ca. tredobbelte mængde, hvorved rumvægten forøges. En tilblanding af 20% af de nævnte fiberstoffer giver en mere eller mindre lige så stor styrke til håndteringen med tilstrækkelig let indstikning i formdelen af fastgørelsesklemmer eller 30 kviste med hånden. Ved anvendelse af cellulose af høj % kvalitet (brudlængde 10.000 m svarende til 10 cN/tex) er det tilstrækkeligt at tilsætte 10-15% (som defibreret materiale), men på grund af cellulosens høje pris, er * produktets pris ugunstig.In the manufacture of a binder mold 15, straw chopping is either chopped dry or wet, preferably to a length of 5 mm. The fiber fabric can be recovered from the straw chop by wrap with sodium hydroxide solution and subsequently defibrate in a defibrator or refiner, or wood fiber fabric, wood grinder 20 or recycled paper may be used. For good quality cellulose (breaking length 10,000 m corresponding to 10 cN / tex), it is sufficient to mix 20% fiber, whereas for poorer quality cellulose, e.g. from recycled paper, with a breaking length of approx. 3,000 m corresponding to 25 to 3 cN / tex, it should be used approx. triple amount, thereby increasing the room weight. An admixture of 20% of the said fiber fabrics gives a more or less equal strength to the handling with sufficient light insertion into the mold part of the fastening clips or 30 twigs by hand. When using high quality cellulose (breaking length 10,000 m equivalent to 10 cN / tex) it is sufficient to add 10-15% (as a defibrated material), but due to the high price of cellulose, * the price of the product is unfavorable.

35 Til fremstilling af en formdel til emballeringsformål anvendes eksempelvis 10 kg halm. 8 kg findeles i en 7 DK 169950 B1 hakkemaskine eller snittemølle (hammermølle), således at der typisk fås et hakket produkt med en længde på 0,5 mm.For example, for the manufacture of a molding part for packaging purposes, 10 kg of straw is used. 8 kg is comminuted in a 7 DK 169950 B1 chopper or chopping mill (hammer mill), so that a chopped product with a length of 0.5 mm is typically obtained.

Af de 2 kg strå fås ved oplukning med natriumhydroxid-5 opløsning og efterfølgende defibrering det til bindingen nødvendige fiberstof. Bestanddelene blandes indbyrdes og anbringes i en form. Da den vandholdige blanding har gennemgående kanaler, forløber afvandingen temmeligt hurtigt. Den er afsluttet efter nogle timer, senest dog i 10 løbet af en dags tid. Den således fremstillede formdel kan beskyttes på overfladen, f.eks. ved imprægnering af overfladen ved påsprøjtning eller neddypning i voks, stearin eller lignende.Of the 2 kg straw is obtained by opening with sodium hydroxide solution and subsequently defibrating the fiber required for bonding. The ingredients are mixed together and placed in a mold. As the aqueous mixture has through channels, the drainage proceeds rather quickly. It is completed after a few hours, no later than 10 within a day's time. The mold part thus produced can be protected on the surface, e.g. by impregnating the surface by spraying or dipping in wax, candles or the like.

Til fremstilling af møbeldele, især møbeldele, som udsæt-15 tes for mekanisk belastning, såsom stolelæn, siddeskåle og lignende, underkastes den del af udgangsmaterialet, som er bestemt til hoveddelen, høj grad af findeling, og der arbejdes med en stor mængde cellulose, f.eks. 40%. Efter tørring overtrækkes de dannede formlegemet med et egnet 20 overtræk, f.eks. et tyndt lag kunststof.For the manufacture of furniture parts, especially furniture parts which are subjected to mechanical stress, such as chairrests, seating bowls and the like, the portion of the starting material intended for the main part is subjected to a high degree of comminution, and a large amount of cellulose is used. for example. 40%. After drying, the formed mold body is coated with a suitable coating, e.g. a thin layer of plastic.

Til formdele inden for byggeområdet, f.eks. skillevægge, døre, men også til møbler, anbefales det at anbringe et tyndt lag rent fiberstof på alle overflader. Dette gennemføres fortrinsvis allerede i formen. Man skal blot 25 være opmærksom på, at dette lag har tilstrækkelig stor vandgennemtrængelighed, således at der opnås en tilstrækkelig hurtig tørring.For mold components within the building area, e.g. partitions, doors, but also for furniture, it is recommended to apply a thin layer of clean fiber to all surfaces. This is preferably already carried out in the mold. Just be aware that this layer has sufficiently high water permeability to achieve sufficiently rapid drying.

Claims

A process for making lightweight, binder-free and environmentally friendly moldings of lignocellulose-containing material, characterized in that most of the 3 lignocellulose-containing material is straw cut or chopped in a dry state to a length of up to 5 mm, typically 0.5 mm, in this form is wet mixed with the smaller portion of a defibrated lignocellulosic material, and this mixture is formed and then dried.

A method according to claim 1, characterized in that the smaller part also consists of straw which is opened cold or hot with sodium hydroxide solution and has subsequently been defibrated.

Method according to claim 1, characterized in that the smaller part consists of defibrated wood.

Method according to claim 1, characterized in that the smaller part consists of recycled recycled paper.

Process according to claim 1, characterized in that the smaller part consists of wood grind.

Process according to claim 1, characterized in that the mold bodies are completely or superficially impregnated against water spray.

Process according to claim 1, characterized in that the stability of the mold body is increased by forming an inner thin layer of pure fiber material. in

Method according to one of Claims 1 to 7, characterized in that the molding body is made for binder purposes for bonding wreaths and flower combinations or moldings for building purposes or moldings for packaging purposes and / or moldings for furniture parts. DK 169950 B1

A method according to any one of claims 1-8, characterized in that the mold bodies have a sufficiently high permeability, especially air permeability, that a dewatering can be achieved over several hours.