DE2149864A1 - Expanded polystyrene beads prodn - hot-rolling to expel residual gases - Google Patents

Expanded polystyrene beads prodn - hot-rolling to expel residual gases

Info

Publication number
DE2149864A1
DE2149864A1 DE19712149864 DE2149864A DE2149864A1 DE 2149864 A1 DE2149864 A1 DE 2149864A1 DE 19712149864 DE19712149864 DE 19712149864 DE 2149864 A DE2149864 A DE 2149864A DE 2149864 A1 DE2149864 A1 DE 2149864A1
Authority
DE
Germany
Prior art keywords
hot
prodn
rolling
expanded polystyrene
polystyrene beads
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.)
Pending
Application number
DE19712149864
Other languages
German (de)
Inventor
Joerg Udo Patzke
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.)
Individual
Original Assignee
Individual
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 by Individual filed Critical Individual
Priority to DE19712149864 priority Critical patent/DE2149864A1/en
Publication of DE2149864A1 publication Critical patent/DE2149864A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/461—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length dispensing apparatus, e.g. dispensing foaming resin over the whole width of the moving surface

Abstract

Pref. the fresh, very light beads are rolled, while still hot, by calender rollers to 1/8 thickness, expelling the residual steam-pentane mixture. The beads can be used for shaped and packaging parts at above 20 kg/in3. The process speeds up the beads prodn.

Description

Beschreibung zur Patentanmeldung vom 15.Januar 1971 Walzen von noch heißen - frischen- sehr leichten Polystyrolperlen zur schnelleren und mediensparenderen Verarbeitung für Form- und Verpackungsteilen und dergl.Description of the patent application dated January 15, 1971 rollers from noch hot - fresh - very light polystyrene beads for faster and more media-saving Processing for molded and packaging parts and the like.

Das durch heißen Sattdampf (ca. 116 Grad C.) aufgeschöumte Polystyrol soll eine Zwischenlagerzeit von min. 6 und max. ca. 48 Stunden erfahren um in dieser Zeit das noch in sich berindliche restliche Pentangas wieder abzulagern und durch Zuführung von Sauerstoff zu stabilisieren. Wenn dieser Vorgang nicht beachtet wird und das aufgeschöumte Polystyrol sofort verarbeit et wird, verschmoren die Polystyrolparktikelchen bzw. können nicht mehr bei einem neuerlichen Dampfzutritt weiterexpandieren, da der Gasträger bis dahin nur heiße Luft bzw. Dampf ist.The polystyrene foamed up by hot saturated steam (approx. 116 degrees C.) should experience an interim storage time of at least 6 and a maximum of approx. 48 hours in order to achieve this Time to deposit the remaining pentane gas again and through Stabilize the supply of oxygen. If this process is not followed and the foamed polystyrene is processed immediately, the polystyrene particles will char or can no longer expand when steam enters again, because the gas carrier until then is only hot air or steam.

Außerdem ist die einzelne Perle durch den in sich befindlichen Weichmachergehalt nicht mehr stabil genug auch einer materiellen Beanspruchung durch Gebläse oder FU 1 linjektoren standzuhalten.In addition, the individual pearl is due to the plasticizer content contained in it no longer stable enough to withstand material stress from blowers or FU 1 to withstand injectors.

Durch das Pressen nach Austritt aus dem Borschäumgerät in weichem heißen Zustand mittels Kalanderwalzen auf ca. 1/8 Stärke wird einmal das restliche Dampf-Pentangemisch durch den Druck getrennt und man hat somit nur noch das restliche Pentan als Ablagerung in den sich nun gebrochenen Zellwänden der einzelnen Perle zurückgedrängt. Die weiche elastische Perle läßt sich sehr leicht zerdrücken, stabilisiert sich aber langsam wieder sowie sie nach und nach erkaltet wobei der Weichmachergehalt seine Wirkung wieder verliert.By pressing in soft after exiting the boron foaming device hot condition by means of calender rolls to approx. 1/8 thickness becomes once the rest Steam-pentane mixture separated by the pressure and you only have the rest Pentane as a deposit in the now broken cell walls of the individual pearl pushed back. The soft elastic pearl can be easily crushed, stabilized but slowly re-emerges as it gradually cools down, with the plasticizer content loses its effect again.

Das Volumen wird so nicht mehr (und d. h.nach und nach sind ca. 1a-15 Sekunden) seine vorherige Größe erreichen, jedoch zu ca. 80 % wieder erscheinen.The volume is no longer like this (and that means gradually about 1a-15 Seconds) reach their previous size, but reappear approximately 80%.

Daraus ergibt sich bei sehr leichterem Vorschäumgewicht ein genaueres Ausschäumen sowie die Ausnutzung aller Partikel, da das Polystyrol keine gleichmäßige Ausschäumung bei Raumgewichten die zur Herstellung von Form- und Verpackungteilen im Raumgewicht über 20 kg/cbm, für alle Perlen garantiet.This results in a more precise one with a very lighter pre-expansion weight Foaming as well as the utilization of all particles, since the polystyrene is not uniform Foaming at volume densities for the production of molded and packaging parts with a volume weight of over 20 kg / cbm, guaranteed for all pearls.

Nach dem Befüllen der Formanlagen hat nun das vorbehandelte Polystyrol durch sein ursprünglich leichtes Raumgewicht die Eigenschaft mit viel weniger Dampf und auch mit niedrigerem Dampfdruck seine Restausschäumung vorzunehmen. Die ist elastischer und trotzdem enthält sie die gleiche Menge Pentangasgehalt der benötigt wird. Das Entlüften (bzw. gebräuchlich Kühlen genannt) wird nun auch sehr viel schneller wie in der alten Form angewendet esrfolgen, da die während der Wirkung des Weichmgchers gebrochenen Zellen durch Kalandierung, das restliche Pentangas schneller austreten lassen.After the molding equipment has been filled, the pretreated polystyrene is now in place due to its originally light density, it has the property with much less steam and also to carry out its residual foaming with a lower vapor pressure. She is more elastic and yet it contains the same amount of pentane gas that is required will. Venting (or commonly called cooling) is now also much faster as applied in the old form, since they are carried out during the action of the softener broken cells by calendering, the remaining pentane escape faster permit.

a) Die Verarbeitungszeiten werden daher auf über 1/3 der ursprünglichen Zeit reduziert.a) The processing times are therefore over 1/3 of the original Time reduced.

b) Der Verbrauch vom Kühlwasser reduziert sich um ca. 40 % . .b) The consumption of cooling water is reduced by approx. 40%. .

c) Außerdem entfällt die sehr teuere aufwendige Zwischenlagerung und die damit verbundene Brandgefahr.c) In addition, the very expensive and complex interim storage is no longer necessary the associated fire hazard.

d) Hinzu kommt noch eine schnellere Austrocknung und Verwendung für den Einsatz des Form- und Verpackungsteiles oder dergl.d) In addition there is a faster drying out and use for the use of the molded and packaging part or the like.

Claims (1)

Patentanspruch: Claim: Polystyrol-Schnellverarbeitung, dadurch gekennzeichnet, daß Blähfähigkeit des Materials weitgehendst kostensparend beschleunigt werden kann.Rapid processing of polystyrene, characterized in that it is expandable of the material can be accelerated as much as possible in a cost-saving manner.
DE19712149864 1971-10-06 1971-10-06 Expanded polystyrene beads prodn - hot-rolling to expel residual gases Pending DE2149864A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19712149864 DE2149864A1 (en) 1971-10-06 1971-10-06 Expanded polystyrene beads prodn - hot-rolling to expel residual gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712149864 DE2149864A1 (en) 1971-10-06 1971-10-06 Expanded polystyrene beads prodn - hot-rolling to expel residual gases

Publications (1)

Publication Number Publication Date
DE2149864A1 true DE2149864A1 (en) 1973-07-26

Family

ID=5821621

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19712149864 Pending DE2149864A1 (en) 1971-10-06 1971-10-06 Expanded polystyrene beads prodn - hot-rolling to expel residual gases

Country Status (1)

Country Link
DE (1) DE2149864A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3613956A1 (en) * 1985-04-25 1986-10-30 Sciaky S.A., Vitry sur Seine, Val-de-Marne ASSEMBLY SYSTEM FOR ASSEMBLING PARTS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3613956A1 (en) * 1985-04-25 1986-10-30 Sciaky S.A., Vitry sur Seine, Val-de-Marne ASSEMBLY SYSTEM FOR ASSEMBLING PARTS

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