DE102008008035B4 - Process for the production of polyamide foam - Google Patents
Process for the production of polyamide foam Download PDFInfo
- Publication number
- DE102008008035B4 DE102008008035B4 DE102008008035A DE102008008035A DE102008008035B4 DE 102008008035 B4 DE102008008035 B4 DE 102008008035B4 DE 102008008035 A DE102008008035 A DE 102008008035A DE 102008008035 A DE102008008035 A DE 102008008035A DE 102008008035 B4 DE102008008035 B4 DE 102008008035B4
- Authority
- DE
- Germany
- Prior art keywords
- polyamide
- polyamide foam
- gas
- melt
- thermal decomposition
- 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.)
- Expired - Fee Related
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
- B29C44/3442—Mixing, kneading or conveying the foamable material
- B29C44/3446—Feeding the blowing agent
-
- 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
- B29C44/3442—Mixing, kneading or conveying the foamable material
- B29C44/3446—Feeding the blowing agent
- B29C44/3457—Feeding the blowing agent in solid form to the plastic material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/26—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2030/00—Pneumatic or solid tyres or parts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2201/00—Foams characterised by the foaming process
- C08J2201/02—Foams characterised by the foaming process characterised by mechanical pre- or post-treatments
- C08J2201/03—Extrusion of the foamable blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2201/00—Foams characterised by the foaming process
- C08J2201/04—Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
- C08J2201/046—Elimination of a polymeric phase
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2300/00—Characterised by the use of unspecified polymers
- C08J2300/30—Polymeric waste or recycled polymer
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Verfahren zur Herstellung von Polyamidschaum (2) unter Verwendung von Altreifengranulat enthaltend Polyamidkordfasern und Gummipulver, die in einem Extruder (1) unter Bildung einer Schmelzmasse (3) einmalig erwärmt werden, wobei gleichzeitig eine thermische Zerlegung des Gummipulvers in staubfeinen technischen Kohlenstoff und Spaltgas erfolgt und wobei das Spaltgas als Gasporenbildner zum Verschäumen der Schmelzmasse (3) dient und wobei der technische Kohlenstoff als armierender Füllstoff zur Erhöhung der Festigkeit des Polyamidschaumes (2) dient.Process for the production of polyamide foam (2) using used granules containing polyamide cord fibers and rubber powder, which are heated once in an extruder (1) to form a melt (3), at the same time a thermal decomposition of the rubber powder in dusty technical carbon and fission gas occurs and wherein the cleavage gas serves as a gas-pore former for foaming the melt (3) and wherein the technical carbon serves as reinforcing filler to increase the strength of the polyamide foam (2).
Description
Die Erfindung betrifft ein Verfahren zur Herstellung von Polyamidschaum, das sich durch eine gute Umweltverträglichkeit auszeichnet.The Invention relates to a process for the production of polyamide foam, which is characterized by good environmental compatibility.
Bekannt sind Verfahren zur Plastschaumgewinnung, bei denen eine Erwärmung von Mischungen aus flüssigen oder festen Ausgangskomponenten (Halbfabrikaten) gemeinsam mit Treibmitteln und Füllstoffen erfolgt.Known are methods for plastic foam extraction in which a heating of Mixtures of liquid or solid starting components (semi-finished products) together with blowing agents and fillers he follows.
So
wird in der
Aus
der
Zu den Mängeln dieses Verfahrens gehören Sonderaktivatoren und Sondertreibmittel. Auch dieses Verfahren zeichnet sich durch eine mehrstufige Polyamidschaumgewinnung aus.To the defects This procedure is a special activator and special blowing agents. This method is also characterized a multi-stage polyamide foam extraction.
Aus Khoshaba N., Sabsay O., Barshtein G., Kuleznev V, Technological properties of the expanded and filled polyolefins, Plastics (J. Plast. Massy), 1991, 11, s. 46–48 ist eine Technologie der Gewinnung von geschäumten extrudierten Thermoplasten bekannt. Bei diesem Verfahren wird Polyäthylen von hoher und niedriger Dichte unter Verwendung der Füllstoffe Kreide und Glasfasern verarbeitet. Alle diese Komponenten werden zuerst im Granulator und dann im Extruder bei entsprechender Temperatur zusammengemischt. Im zweiten Schritt wird in die Mischung ein Treibmittel (Gasporenbilder) beigefügt. Im Ergebnis erfolgt die Gewinnung vom schäumenden Thermoplasten.Out Khoshaba N., Sabsay O., Barshtein G., Kuleznev V, Technological properties of the expanded and filled polyolefins, Plastics (J. Plast. Massy), 1991, 11, p. 46-48 is a technology of recovery of foamed extruded thermoplastics known. In this process is polyethylene high and low density using the fillers Cretaceous and glass fibers processed. All these components will be first in the granulator and then in the extruder at the appropriate temperature mixed together. In the second step, a blowing agent is added to the mixture (Gas pores) attached. As a result, the recovery of the foaming thermoplastic.
Zu den Mängeln dieses Verfahrens gehören ihre niedrige Produktivität, die Notwendigkeit von Sonderfüllstoffen und Treibmitteln, Zweistufigkeit und die vergleichsweise hohen Kosten vom aufgeschäumten Thermoplasten.To the defects This procedure is theirs low productivity, the need for special fillers and blowing agents, two-stage and the comparatively high cost frothed Thermoplastics.
Aus
der
Aufgabe der Erfindung ist es, Polyamidschäume billiger, kontinuierlich und unter Verwendung von Abfallstoffen herzustellen.task The invention is cheaper, continuous, polyamide foams and using waste materials.
Gelöst wird diese Aufgabe durch ein Verfahren mit den Merkmalen des Anspruches 1; vorteilhafte Ausgestaltungen sind Gegenstand der Unteransprüche.Is solved this object by a method having the features of the claim 1; advantageous embodiments are the subject of the dependent claims.
Erfindungsgemäß wird ein Verfahren zur Herstellung von Polyamidschaum vorgeschlagen unter Verwendung von Altreifengranulat enthaltend Polyamidkordfasern und Gummipulver, die in einem Extruder unter Bildung einer Schmelzmasse einmalig erwärmt werden, wobei gleichzeitig eine thermische Zerlegung (Pyrolyse) des Gummipulvers in staubfeinen technischen Kohlenstoff und Spaltgas erfolgt und wobei das Spaltgas als Gasporenbildner zum Verschäumen der Schmelzmasse dient und wobei der technische Kohlenstoff (Polycarbon) als armierender Füllstoff zur Erhöhung der Festigkeit des Polyamidschaumes dient.According to the invention is a Process for the production of polyamide foam proposed under Use of used tire granules containing polyamide cord fibers and Rubber powder used in an extruder to form a melt once heated with simultaneous thermal decomposition (pyrolysis) of the rubber powder in dusty technical carbon and fission gas takes place and wherein the cracked gas as Gasporenbildner for foaming the Melt and serves the technical carbon (polycarbon) as reinforcing filler to increase the strength of the polyamide foam is used.
Ein solches Verfahren dient nicht nur der Ressourcen- und Energieeinsparung sondern stellt auch eine sinnvolle Alternative für eine Altreifenverwertung durch umweltschädliches Verbrennen dar.One such a method is not only the resource and energy savings but also provides a useful alternative for a scrap tire recycling by environmentally harmful Burning dar.
Anhand
der
Im
Extruder
Polycarbon (technischer Kohlenstoff) erfüllt die Funktion von armierenden Füllstoffen und bewirkt so einen Plastschaum von höherer Festigkeit (bis auf 200–250%).Polycarbon (technical carbon) met The function of reinforcing fillers and thus produces a plastic foam of higher strength (up to 200-250%).
Das
Spaltgas dient als Gasporenbildner, der die Schmelzmasse
Der
warme Polyamidschaum, der den Ausgang aus dem Extruder
Da
die thermische Zerlegung (Pyrolyse) von Gummi (Gummipulver) bei
80–85°C ein klar
ausgeprägter
exothermer Prozess ist, steht eine große Energiemenge für den Verfahrensprozess
zur Verfügung.
Dies bedeutet eine Energieeinsparung, da weniger Wärme dem
Extruder von außen
zugeführt
werden muss für
das Erwärmen
der Ausgangsmischung
Bis heute werden die genannten Abfälle aus der Verarbeitung von abgenutzten Reifen nicht verwendet. Dabei geht es um bis zu 20% der Masse von verwertbaren Altreifen.To Today, the waste mentioned not used from the processing of worn tires. there it is up to 20% of the mass of recyclable used tires.
Jährlich fallen nur in Deutschland 900.000 t von Abfälle aus Gummireifen an, die der Verwertung unterliegenden. Darum kann der Umfang ihrer ressourcensparenden rationalen Verarbeitung in Plastschaum (Polyamidschaum) 180.000 t erreichen. Außerdem kann mit dem Verfahren die umweltschädliche Verbrennung reduziert werden.Fall annually only in Germany 900,000 t of rubber tire waste, the subject to recovery. That's why the scope of their resource-saving rational processing in plastic foam (polyamide foam) 180,000 t reach. Furthermore The process can reduce environmentally harmful combustion become.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008008035A DE102008008035B4 (en) | 2008-02-05 | 2008-02-05 | Process for the production of polyamide foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008008035A DE102008008035B4 (en) | 2008-02-05 | 2008-02-05 | Process for the production of polyamide foam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE102008008035A1 DE102008008035A1 (en) | 2009-08-06 |
| DE102008008035B4 true DE102008008035B4 (en) | 2010-06-02 |
Family
ID=40822234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102008008035A Expired - Fee Related DE102008008035B4 (en) | 2008-02-05 | 2008-02-05 | Process for the production of polyamide foam |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102008008035B4 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH52036A (en) * | 1910-04-15 | 1911-10-16 | Wilhelm Reutter | Collapsible hood for motor vehicles |
| DE2506674A1 (en) * | 1974-02-26 | 1975-08-28 | Southlake Pipe Co | POROESE HOSE, IN PARTICULAR IRRIGATION HOSE, AND PROCESS FOR ITS MANUFACTURING |
| DD133806A1 (en) * | 1977-11-08 | 1979-01-24 | Karin Baum | PROCESS FOR PREPARING POLYAMIDE FOAM |
-
2008
- 2008-02-05 DE DE102008008035A patent/DE102008008035B4/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH52036A (en) * | 1910-04-15 | 1911-10-16 | Wilhelm Reutter | Collapsible hood for motor vehicles |
| DE2506674A1 (en) * | 1974-02-26 | 1975-08-28 | Southlake Pipe Co | POROESE HOSE, IN PARTICULAR IRRIGATION HOSE, AND PROCESS FOR ITS MANUFACTURING |
| DD133806A1 (en) * | 1977-11-08 | 1979-01-24 | Karin Baum | PROCESS FOR PREPARING POLYAMIDE FOAM |
Non-Patent Citations (1)
| Title |
|---|
| Khoshaba, N., Sabsay, D. Barstein, G., Kuleznev, V., Technological Properties of the expanded and fined polyofins, Plastics (J. Plast. Massy) 1991, 11, S. 46-48 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102008008035A1 (en) | 2009-08-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8364 | No opposition during term of opposition | ||
| R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |