BE718298A - - Google Patents

Info

Publication number
BE718298A
BE718298A BE718298DA BE718298A BE 718298 A BE718298 A BE 718298A BE 718298D A BE718298D A BE 718298DA BE 718298 A BE718298 A BE 718298A
Authority
BE
Belgium
Prior art keywords
mold
molded bodies
polyurethane foam
materials
foaming
Prior art date
Application number
Other languages
French (fr)
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
Application filed filed Critical
Publication of BE718298A publication Critical patent/BE718298A/fr

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34Auxiliary operations
    • B29C44/36Feeding the material to be shaped
    • B29C44/38Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/383Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using spreading devices mounted in the mould, in front of the feed opening
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material

Description

  

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 



  "Procédé de fabrication de corps moulas en matières-mousse,, de polyuréthannes. 
 EMI1.2 
 



  La fabrication de corps moulés eh #attre.$ de polyuréthanes par moussage en soûle est connue pr1ncl (cf. par exemple le brevet allemand n  1. $'. . B11e %a,t0it par exemple en versant dans un moulé un mélangs é',' ett-cousable à base de composés possédant plusieurs atome 6.h7g;. réactifs et de polyisocyanates. Comme composés aV$e ato o d'hy. drogène réactifs on envisage principalement les poly4thers 4t polyesters présentant des groupes hydroxyle, tandis q Oume exemples de polyisooyanates on citera le 2,-- ,t yr,ri8 diiaocyanate, leurs mélanges isomères ainsi que le pçlyph6nzipolyméthylène-Dolyïsocyanate obtenu par une condensation an111né-for- , naldéhyde et phosgénation ultérieure. Comme agents expanseurs peuvent par exemple servir l'eau ou des hydrocarbures çhlorofiluo- ' - 
 EMI1.3 
 rés. De même des catalyseurs sont en général employés. 



  Les corps moulés obtenus par moussage en moule présentent une surface compacte qui, dans de nombreux cas, montre 

 <Desc/Clms Page number 2> 

 une résistance élevée. 11 est connu également qu'en faisant 
 EMI2.1 
 varier l9 coMposé a utilisa avec atomes d'hydrogsne réactifs, t ute catalyse en faisant varier la température dn, nlege et la ppsssicn du moule, on peut influencer 1a'poau non-qonYiuire se iors du moussage (cf. à ce   sujet l'imprimé mis à l'inaction publique du brevet allemand @   
 EMI2.2 
 1.1%.864). Ainsi, il emt parfaitement possible de fabriquer .des corps moulés qui possédât une peau résistant à   l'abrasion,   épaisse de plusieurs millimetres.

   Dans la fabrication de corps 
 EMI2.3 
 moulés de teinte foncée en tières-mousse de polyuréthanes par mouasage en moule, il toutefois très désavantageux que la surface des corps moulése â . g endroit de l'introduction du mélange ra-ctif et moussable, présehfe une nuance plus claire comparati- 
 EMI2.4 
 vement au restant de la surface. Cet inconvénient rend impropre poir beaucoup d'app33ca'on,, l'utilisation des corps moulés.

   Chose surprenante,on vient de découvrir que 
 EMI2.5 
 .1'n 7,>Out éliminer Ces diff pences de, coloration à la surface des z eopps mDUl6s en matîères-moume de polyuréthanes fabriquées par ust8s en moulee lors qu J laisse pas le mélange réactif et rencozitrez, clireotëient la paroi du moule et qu'on inoïit au, contraire le M(,>,lamie de réaction à travers un article perméable qui est   attaché   demanière à flotter librement entre le moule et l'orifice de remplissage du moule. 



   La présente invention a par conséquent pour objet 
 EMI2.6 
 un procédé de fabrication deorps moulés à surface compacte, <est'-<*di?9 non cellulaires matières-mousse de polyuréthanes par mouasage en moule d'un mé,,4ange de réaction moussable, qui consiste en ce qu'on introduit le mélange de réaction moussable à travers un article perméablejqui est fixé à manière à flotter librement entre .eou7,e et l' g3ifice de remplissage du moule. 



     En   tant   qu'arti@les   perméables à utiliser de maniére avantageuse conformément à   'l'invention   on citera par exemple des tissus textiles, des matières filtrantes, des matières en toisons, des feuilles en matière-mousse de polyuréthane ou   des\éponges   

 <Desc/Clms Page number 3> 

 en matière mousse de polyuréthane. Le procédé conforme à l'invention peut être exécuté de manière connue en soi, avec tous les constituants connus en soi et dans toutes les conditions connues en soi, par exemple   à   température ambiante ou plus élevée.

   L'article perméable à employer conformément à l'invention, dans la fabrication des produits du procédé, est absorbé dans les corps moulés,en d'autres termes il est incorporé dans la sousse et n'est plus discernable à la surface du corps moulé. 



   A   l'aide   du procédé conforme à l'invention on parvient   à   fabriquer des corps moulés ayant une surface compacte teintée de manière parfaitement uniforme. Les produits du procédé peuvent être diversement employés,par exemple comme recouvrement de tableau de bord, accoudoirs, pare-soleil, à savoir donc de manière générale comme rembourrage protecteur dans le secteur automobile, en outre comme couvre-parquet et   sièges.   Le procédé conforme à l'invention est illustré de manière plus détaillée par le dessin. Dans   celui-ci 1   représente un moule de moussage de forme   quelconque, g   le couvercle de moule qui lui est assooié avec orifice de remplissage 3;4 représente un article perméable. 



    -REVENDICATIONS-   le- Procédé de fabrication   d'articles   moulés à surface compacte, c'est-à-dire non cellulaire, en matières-mousse de polyuréthanes par moussage en moule d'un mélange   de   réaction   moussable,   caractérisé en ce qu'on introduit le mélange de réaction à travers un article perméable qui est fixé de manière à flotter librement entre le moule et   l'orifice   de remplissage du   mou le .  



   <Desc / Clms Page number 1>
 
 EMI1.1
 



  "Process for the production of molded bodies from foam materials, polyurethanes.
 EMI1.2
 



  The manufacture of molded bodies of polyurethanes by solid foaming is known pr1ncl (cf., for example, German Patent No. 1. $ '. B11e% a, t0it for example by pouring into a mold a mixture of , 'andt-sewable based on compounds having several atoms 6.h7g ;. reactive and polyisocyanates. As reactive compounds aV $ e hydrogen ato o. drogen are mainly considered poly4thers 4t polyesters having hydroxyl groups, while q Oume Examples of polyisooyanates include the 2, -, t yr, ri8 diiaocyanate, their isomeric mixtures as well as the pçlyph6nzipolymethylene-Dolyisocyanate obtained by an an111ne-for-, naldehyde condensation and subsequent phosgenation. Water can for example be used as expanding agents. or chlorofiluo- '- hydrocarbons
 EMI1.3
 res. Likewise, catalysts are generally employed.



  Molded bodies obtained by in-mold foaming exhibit a compact surface which in many cases shows

 <Desc / Clms Page number 2>

 high strength. It is also known that by making
 EMI2.1
 Vary l9 coMposed to used with reactive hydrogen atoms, all catalysis by varying the temperature of the mold and the ppsssicn, we can influence the non-qonYiuire weight during foaming (see on this subject l ' print put to public inaction of the German patent @
 EMI2.2
 1.1% .864). Thus, it is perfectly possible to manufacture molded bodies which had an abrasion resistant skin, several millimeters thick.

   In body making
 EMI2.3
 Dark-colored molded of polyurethane foams by in-mold molding, however, it is very disadvantageous that the surface of the molded bodies is formed. g place of the introduction of the ra-ctive and foamable mixture, presents a lighter shade comparati-
 EMI2.4
 vement to the rest of the surface. This drawback makes many applications unsuitable for the use of the moldings.

   Surprisingly, we just found out that
 EMI2.5
 .1'n 7,> Out eliminate these differences in coloring on the surface of the mDUl6s z eopps in polyurethane materials manufactured by ust8s in the mold when not leaving the reactive mixture and rencozitrez, flashing the wall of the mold and on the contrary, the M (,>, reaction layer is initiated through a permeable article which is attached so as to float freely between the mold and the filling hole of the mold.



   The object of the present invention is therefore
 EMI2.6
 a method of making molded bodies with a compact surface, non-cellular polyurethane foam materials by in-mold molding of a foamable reaction mixture, which comprises introducing the foamable reaction mixture through a permeable article which is fixed so as to float freely between .eor7, e and the mold fill port.



     Examples of permeable articles which can be advantageously used in accordance with the invention are textile fabrics, filter materials, fleece materials, polyurethane foam sheets or sponges.

 <Desc / Clms Page number 3>

 in polyurethane foam material. The process according to the invention can be carried out in a manner known per se, with all the constituents known per se and under all the conditions known per se, for example at room temperature or higher.

   The permeable article to be employed according to the invention in the manufacture of the products of the process is absorbed in the molded bodies, in other words it is incorporated into the base and is no longer discernible on the surface of the molded body .



   By means of the process according to the invention, it is possible to produce molded bodies having a compact surface tinted perfectly evenly. The products of the process can be used in various ways, for example as cover for dashboards, armrests, sun visors, namely therefore generally as protective padding in the automotive sector, in addition as floor coverings and seats. The method according to the invention is illustrated in more detail by the drawing. In this 1 represents a foaming mold of any shape, g the mold cover which is associated therewith with filling hole 3; 4 represents a permeable article.



    -CLAIMS- the- A method of manufacturing molded articles with a compact surface, that is to say non-cellular, of polyurethane foam materials by foaming in a mold of a foamable reaction mixture, characterized in that: introduces the reaction mixture through a permeable article which is fixed so as to float freely between the mold and the slack fill port.

 

Claims (1)

2.- Procédé selon la revendication 1, caractérisé en ce qu?on utilise en tant qu'articles perméables des tissus textiles, des matières filtrantes, des matières en toison, des <Desc/Clms Page number 4> feuilles en matière-mousse de polyuréthane ou des éponges en matière-mousse de polyuréthane, 2. A method according to claim 1, characterized in that textile fabrics, filter materials, fleece materials, fabrics are used as permeable articles. <Desc / Clms Page number 4> sheets in polyurethane foam material or sponges in polyurethane foam material,
BE718298D 1967-07-19 1968-07-19 BE718298A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF0053002 1967-07-19

Publications (1)

Publication Number Publication Date
BE718298A true BE718298A (en) 1968-12-31

Family

ID=7105915

Family Applications (1)

Application Number Title Priority Date Filing Date
BE718298D BE718298A (en) 1967-07-19 1968-07-19

Country Status (1)

Country Link
BE (1) BE718298A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2632242A1 (en) * 1988-06-03 1989-12-08 Arnaud Guy Method of manufacturing a composite material based on expanded thermosetting resin and novel material obtained
WO2002042699A1 (en) * 2000-11-24 2002-05-30 BSH Bosch und Siemens Hausgeräte GmbH Thermally insulating housing for a cooling device
EP3127678A1 (en) * 2015-08-07 2017-02-08 SMP Deutschland GmbH Device and method for plastic foaming

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2632242A1 (en) * 1988-06-03 1989-12-08 Arnaud Guy Method of manufacturing a composite material based on expanded thermosetting resin and novel material obtained
WO2002042699A1 (en) * 2000-11-24 2002-05-30 BSH Bosch und Siemens Hausgeräte GmbH Thermally insulating housing for a cooling device
EP3127678A1 (en) * 2015-08-07 2017-02-08 SMP Deutschland GmbH Device and method for plastic foaming

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