EP2743190A1 - Packing polycrystalline silicon - Google Patents

Packing polycrystalline silicon Download PDF

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Publication number
EP2743190A1
EP2743190A1 EP13195295.4A EP13195295A EP2743190A1 EP 2743190 A1 EP2743190 A1 EP 2743190A1 EP 13195295 A EP13195295 A EP 13195295A EP 2743190 A1 EP2743190 A1 EP 2743190A1
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EP
European Patent Office
Prior art keywords
bag
plastic
fragments
plastic bag
double
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Granted
Application number
EP13195295.4A
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German (de)
French (fr)
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EP2743190B1 (en
Inventor
Matthias Vietz
Bruno Lichtenegger
Dr. Reiner Pech
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Wacker Chemie AG
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Wacker Chemie AG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B5/00—Packaging individual articles in containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, jars
    • B65B5/06—Packaging groups of articles, the groups being treated as single articles
    • B65B5/067—Packaging groups of articles, the groups being treated as single articles in bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D29/00—Sacks or like containers made of fabrics; Flexible containers of open-work, e.g. net-like construction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/28—Controlling escape of air or dust from containers or receptacles during filling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B25/00—Packaging other articles presenting special problems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B29/00—Packaging of materials presenting special problems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/04—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • B65B51/146—Closing bags

Definitions

  • the invention relates to a method for packaging polycrystalline silicon.
  • Polycrystalline silicon (polysilicon) is predominantly deposited by means of the Siemens process from halosilanes such as trichlorosilane and then comminuted as little as possible in contamination into polycrystalline silicon fragments.
  • the material should also be packed with low contamination before it is transported to the customer.
  • Fragments protruding from the bag packaging can be contaminated unacceptably directly by surrounding materials, internal fragments by inflowing ambient air.
  • US2012 / 198793 A1 discloses, prior to welding to suck the air from the bag until a flat, air-poor bag is formed.
  • the object is achieved by a method for packing polysilicon in the form of fragments by filling the fragments in a first plastic bag, wherein the first plastic bag is introduced after filling the fragments in a second plastic bag or even before filling the fragments in the first Plastic bag, the first plastic bag is inserted into the second plastic bag, whereby the fragments are in a double bag, which is closed, characterized in that the after filling the fragments in the two plastic bags of the double bag located air before the Closing the double bag is removed so that the total volume of the double bag in relation to the volume of the fragments is 2.4 to 3.0.
  • each of the two plastic bags of the double bag is sealed separately after the removal of air by welding.
  • the first plastic bag After the filling of fragments in the first plastic bag, air is removed from the first plastic bag, the first plastic bag closed and introduced into the second plastic bag, so that the double bag is formed, and then removes air from the second plastic bag and this closed.
  • a double bag comprising a first and a second plastic bag and polysilicon in the form of fragments, which is located in the first plastic bag, wherein the first plastic bag is inserted into the second plastic bag, wherein both plastic bags are closed, the total volume of the double bag in relation to the volume of the fragments is 2.4 to 3.0.
  • the total volume of the first bag relative to the volume of the fragments is 2.0 to 2.7.
  • the first bag is dimensioned so that the plastic films fit snugly against the silicon fragments. As a result, relative movements between the fragments can be avoided.
  • the plastic bags are preferably made of a high purity plastic. It is preferably polyethylene (PE), polyethylene terephthalate (PET) or polypropylene (PP) or composite films.
  • PE polyethylene
  • PET polyethylene terephthalate
  • PP polypropylene
  • a composite film is a multilayer packaging film from which flexible packaging is made. The individual film layers are usually extruded or laminated or laminated.
  • the plastic bag preferably has a thickness of 10 to 1000 microns.
  • the closing of the plastic bag can be done for example by means of welding, gluing, sewing or positive locking. Preferably, it is done by welding.
  • the packaged bag To determine the volume of the packaged bag, it is immersed in a pool of water.
  • the displaced water corresponds to the total volume of the bag (Vges).
  • the volume of the silicon was determined by weighing the silicon with the constant density of hyperpure silicon (2.336 g / cm 3 ).
  • the volume of silicon could also be determined by the dipping method.
  • Table 1 shows the V ges / V si ratio and the qualitative results for punctures and fines production for non-evacuated packaging, for a prior art package US2010 / 154357 A1 as well as two easy-packed bags.
  • Bag 1 was filled with 4-15 mm pieces.
  • Bag 2 was filled with fragments of size 45-120 mm.
  • Table 2 shows the ratio V ges / V Si and the qualitative results in terms of piercing and fines production for double bag packaging without air extraction, as well as two examples of the invention.
  • Table 2 shows the ratio V ges / V Si and the qualitative results in terms of piercing and fines production for double bag packaging without air extraction, as well as two examples of the invention.
  • V ges / V Si 2.0 to 2.7, preferably from 2.0 to 2.4.
  • V ges / V Si of 2.40 to 3.0 is essential.
  • the environmental conditions during packaging are preferably a temperature of 18-25 ° C.
  • the relative humidity is preferably 30-70%.
  • the packaging also takes place in the vicinity of filtered air.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Packages (AREA)
  • Silicon Compounds (AREA)
  • Vacuum Packaging (AREA)

Abstract

The method involves introducing the chunks into first plastic bag. The first plastic bag is introduced into second plastic bag after introducing of chunks or first plastic bag is inserted into second plastic bag before introducing of chunks into first plastic bag, so that the chunks are present in a double bag. The air from the double bag is removed after introducing of the chunks and before sealing the double bag, such that a total volume of double bag relative to a volume of the chunks is 2.4 to 3.0. A relative air humidity is maintained in the range of 30-70%. An independent claim is included for double bag.

Description

Die Erfindung betrifft ein Verfahren zur Verpackung von polykristallinem Silicium.The invention relates to a method for packaging polycrystalline silicon.

Polykristallines Silicium (Polysilicium) wird überwiegend mittels des Siemensverfahrens aus Halogensilanen wie Trichlorsilan abgeschieden und anschließend möglichst kontaminationsarm in polykristalline Siliciumbruchstücke zerkleinert.Polycrystalline silicon (polysilicon) is predominantly deposited by means of the Siemens process from halosilanes such as trichlorosilane and then comminuted as little as possible in contamination into polycrystalline silicon fragments.

Für Anwendungen in der Halbleiter- und Solarindustrie ist ein möglichst wenig kontaminierter Polysiliciumbruch erwünscht. Daher sollte das Material auch kontaminationsarm verpackt werden, bevor es zum Kunden transportiert wird.For applications in the semiconductor and solar industries, the least possible contaminated polysilicon fraction is desired. Therefore, the material should also be packed with low contamination before it is transported to the customer.

Üblicherweise wird Polysiliciumbruch in Kunststoffbeuteln verpackt.Usually polysilicon break is packed in plastic bags.

Bei Polysiliciumbruch handelt es sich um ein scharfkantiges, nicht rieselfähiges Schüttgut. Daher ist bei der Verpackung darauf zu achten, dass das Material die üblichen Kunststoffbeutel beim Befüllen nicht durchstößt oder im schlimmsten Fall sogar vollständig zerstört. Um dies zu vermeiden, werden im Stand der Technik verschiedene Maßnahmen vorgeschlagen. US2010/154357 A1 sieht beispielsweise einen Energieabsorber innerhalb des Kunststoffbeutels vor.Polysilicon breakage is a sharp-edged, non-free-flowing bulk material. Therefore, it must be ensured during packaging that the material does not puncture the usual plastic bags during filling, or even completely destroyed in the worst case. In order to avoid this, various measures are proposed in the prior art. US2010 / 154357 A1 for example, provides an energy absorber inside the plastic bag.

Solche Durchstoßungen des Beutels können jedoch nicht nur während der Verpackung, sondern auch beim Transport zum Kunden auftreten. Polysiliciumbruch ist scharfkantig, so dass bei ungünstiger Orientierung der Bruchstücke im Beutel durch Relativbewegung bzw. Druck der Bruchstücke zur bzw. auf die Beutelfolie diese durchschnitten bzw. durchstoßen werden.Such punctures of the bag, however, can occur not only during packaging but also during transport to the customer. Polysilicon is sharp-edged, so that when unfavorable orientation of the fragments in the bag by relative movement or pressure of the fragments to or on the bag film they are cut or pierced.

Aus der Beutelverpackung herausstehende Bruchstücke können direkt durch umgebende Materialien, innenliegende Bruchstücke durch einströmende Umgebungsluft inakzeptabel kontaminiert werden.Fragments protruding from the bag packaging can be contaminated unacceptably directly by surrounding materials, internal fragments by inflowing ambient air.

Zudem kommt es beim Transport von verpackten Siliciumbruchstücken zu unerwünschter Nachzerkleinerung.In addition, unwanted post-shredding occurs during transport of packaged silicon fragments.

Dies ist insbesondere deshalb unerwünscht, da der dabei entstehende Feinanteil nachweislich zu einer geringeren Prozessperformance bei den Kunden führt. Dies hat zur Folge, dass vor der Weiterverarbeitung beim Kunden der Feinanteil wieder abgesiebt werden muss, was nachteilig ist.This is undesirable, in particular, since the resulting fine fraction demonstrably leads to a lower process performance for the customer. This has the consequence that prior to further processing at the customer's fines must be screened again, which is disadvantageous.

Diese Problematik gilt gleichermaßen für gebrochenes und klassifiziertes, gereinigtes sowie ungereinigtes Silicium, unabhängig von der Größe der Verpackung (üblicherweise Beutel mit 5 oder 10 kg Polysilicium).This problem applies equally to broken and classified, purified and unrefined silicon, regardless of the size of the packaging (usually 5 or 10 kg polysilicon bags).

In US2010/154357 A1 wird vorgeschlagen, während des Verschließens die Luft aus dem Beutel abzusaugen, bis ein Vakuum von 10 bis 700 mbar entsteht.In US2010 / 154357 A1 It is proposed to suck the air out of the bag during closing until a vacuum of 10 to 700 mbar is produced.

US2012/198793 A1 offenbart, vor dem Verschweißen die Luft aus dem Beutel so lange abzusaugen, bis ein flacher, luftarmer Beutel entsteht. US2012 / 198793 A1 discloses, prior to welding to suck the air from the bag until a flat, air-poor bag is formed.

Diese Maßnahmen sind nicht geeignet, Durchstoßungen zu vermeiden.These measures are not suitable to avoid piercing.

Daraus ergab sich die Aufgabenstellung der Erfindung.This resulted in the task of the invention.

Die Aufgabe wird gelöst durch ein Verfahren zum Verpacken von Polysilicium in Form von Bruchstücken durch Einfüllen der Bruchstücke in einen ersten Kunststoffbeutel, wobei der erste Kunststoffbeutel nach dem Einfüllen der Bruchstücke in einen zweiten Kunststoffbeutel eingebracht wird oder wobei bereits vor dem Einfüllen der Bruchstücke in den ersten Kunststoffbeutel der erste Kunststoffbeutel in den zweiten Kunststoffbeutel gesteckt ist, wodurch sich die Bruchstücke in einem Doppelbeutel befinden, der verschlossen wird, dadurch gekennzeichnet, dass die nach dem Einfüllen der Bruchstücke in den beiden Kunststoffbeuteln des Doppelbeutels befindliche Luft vor dem Verschließen des Doppelbeutels derart entfernt wird, dass das Gesamtvolumen des Doppelbeutels im Verhältnis zum Volumen der Bruchstücke 2,4 bis 3,0 beträgt.The object is achieved by a method for packing polysilicon in the form of fragments by filling the fragments in a first plastic bag, wherein the first plastic bag is introduced after filling the fragments in a second plastic bag or even before filling the fragments in the first Plastic bag, the first plastic bag is inserted into the second plastic bag, whereby the fragments are in a double bag, which is closed, characterized in that the after filling the fragments in the two plastic bags of the double bag located air before the Closing the double bag is removed so that the total volume of the double bag in relation to the volume of the fragments is 2.4 to 3.0.

Vorzugsweise wird jeder der beiden Kunststoffbeutel des Doppelbeutels nach dem Entfernen von Luft separat durch Verschweißen verschlossen.Preferably, each of the two plastic bags of the double bag is sealed separately after the removal of air by welding.

Ebenso ist bevorzugt, die beiden Kunststoffbeutel des Doppelbeutels durch Verschweißen mittels einer gemeinsamen Schweißnaht zu verschließen.It is also preferred to close the two plastic bags of the double bag by welding by means of a common weld.

Vorzugsweise wird nach dem Einfüllen von Bruchstücken in den ersten Kunststoffbeutel Luft aus dem ersten Kunststoffbeutel entfernt, der erste Kunststoffbeutel verschlossen und in den zweiten Kunststoffbeutel eingebracht, so dass der Doppelbeutel entsteht, und anschließend Luft aus dem zweiten Kunststoffbeutel entfernt und dieser verschlossen.Preferably, after the filling of fragments in the first plastic bag, air is removed from the first plastic bag, the first plastic bag closed and introduced into the second plastic bag, so that the double bag is formed, and then removes air from the second plastic bag and this closed.

Die Aufgabe wird auch gelöst durch einen Doppelbeutel, umfassend einen ersten und einen zweiten Kunststoffbeutel und Polysilicium in Form von Bruchstücken, das sich im ersten Kunststoffbeutel befindet, wobei der erste Kunststoffbeutel in den zweiten Kunststoffbeutel gesteckt ist, wobei beide Kunststoffbeutel verschlossen sind, wobei das Gesamtvolumen des Doppelbeutels im Verhältnis zum Volumen der Bruchstücke 2,4 bis 3,0 beträgt.The object is also achieved by a double bag, comprising a first and a second plastic bag and polysilicon in the form of fragments, which is located in the first plastic bag, wherein the first plastic bag is inserted into the second plastic bag, wherein both plastic bags are closed, the total volume of the double bag in relation to the volume of the fragments is 2.4 to 3.0.

Vorzugsweise beträgt das Gesamtvolumen des ersten Beutels im Verhältnis zum Volumen der Bruchstücke 2,0 bis 2,7.Preferably, the total volume of the first bag relative to the volume of the fragments is 2.0 to 2.7.

Vorzugsweise ist der erste Beutel so dimensioniert, dass die Kunststofffolien an den Silicium-Bruchstücken eng anliegen. Dadurch können Relativbewegungen zwischen den Bruchstücken vermieden werden.Preferably, the first bag is dimensioned so that the plastic films fit snugly against the silicon fragments. As a result, relative movements between the fragments can be avoided.

Die Kunststoffbeutel bestehen vorzugsweise aus einem hochreinen Kunststoff. Dabei handelt es sich bevorzugt um Polyethylen (PE), Polyethylenterephthalat (PET) oder Polypropylen (PP) oder um Verbundfolien. Eine Verbundfolie ist eine mehrschichtige Verpackungsfolie, aus der flexible Verpackungen gemacht werden. Die einzelnen Folienschichten werden üblicherweise extrudiert oder kaschiert bzw. laminiert.The plastic bags are preferably made of a high purity plastic. It is preferably polyethylene (PE), polyethylene terephthalate (PET) or polypropylene (PP) or composite films. A composite film is a multilayer packaging film from which flexible packaging is made. The individual film layers are usually extruded or laminated or laminated.

Der Kunststoffbeutel weist vorzugsweise eine Dicke von 10 bis 1000 µm auf.The plastic bag preferably has a thickness of 10 to 1000 microns.

Das Verschließen der Kunststoffbeutel kann beispielsweise mittels Verschweißen, Verkleben, Vernähen oder Formschluss erfolgen. Vorzugsweise erfolgt es mittels Verschweißen.The closing of the plastic bag can be done for example by means of welding, gluing, sewing or positive locking. Preferably, it is done by welding.

Um das Volumen des verpackten Beutel zu bestimmen wird dieser in ein Wasserbecken getaucht.To determine the volume of the packaged bag, it is immersed in a pool of water.

Das verdrängte Wasser entspricht dabei dem Gesamtvolumen des Beutels (Vges).The displaced water corresponds to the total volume of the bag (Vges).

Über die Einwaage des Siliciums wurde mit der konstanten Dichte von Reinstsilicium (2,336 g/cm3) das Volumen des Silicums (Vsi) ermittelt.The volume of the silicon (Vsi) was determined by weighing the silicon with the constant density of hyperpure silicon (2.336 g / cm 3 ).

Alternativ könnte das Volumen des Siliciums ebenfalls über die Tauchmethode ermittelt werden.Alternatively, the volume of silicon could also be determined by the dipping method.

Tabelle 1 zeigt das Verhältnis Vges / Vsi und die qualitativen Ergebnisse bzgl. Durchstoßungen und Feinanteilerzeugung für Verpackungen ohne Luftabsaugung, für eine Verpackung nach dem Stand der Technik gemäß US2010/154357 A1 sowie für zwei einfach verpackte Beutel.Table 1 shows the V ges / V si ratio and the qualitative results for punctures and fines production for non-evacuated packaging, for a prior art package US2010 / 154357 A1 as well as two easy-packed bags.

Durchstoßung der Verpackungsfolie und Entstehung von unerwünschtem Feinanteil wurden nach einer standardisierten Transportsimulation (LKW/Bahn/Schiff) ermittelt.Penetration of the packaging film and formation of unwanted fines were determined according to a standardized transport simulation (truck / rail / ship).

Beutel 1 war mit Bruchstücken der Größe 4-15 mm gefüllt.Bag 1 was filled with 4-15 mm pieces.

Beutel 2 war mit Bruchstücken der Größe 45-120 mm gefüllt.Bag 2 was filled with fragments of size 45-120 mm.

Die Größenklasse ist als längste Entfernung zweier Punkte auf der Oberfläche eines Siliciumbruchstücks (=max. Länge) definiert. Tabelle 1 Vges / VSi Durchstoßung Feinanteil Ohne Luftabsaugung >2,8 häufig viel US2010/154357 A1 <1,8 häufig viel Beutel 1 2,18-2,31 nein nein Beutel 2 2,00-2,69 kaum nein The size class is defined as the longest distance between two points on the surface of a silicon fragment (= maximum length). <b> Table 1 </ b> V ges / V Si puncturing fines Without air extraction > 2.8 often much US2010 / 154357 A1 <1.8 often much Bag 1 2.18 to 2.31 No No Bag 2 2.00 to 2.69 barely No

Beutel 1 und 2 wurden in einem weiteren Versuch in einen zweiten Beutel eingeschweißt (Doppelbeutel).Pouches 1 and 2 were sealed in a second test in a second bag (double bag).

Tabelle 2 zeigt das Verhältnis Vges / VSi und die qualitativen Ergebnisse bzgl. Durchstoßungen und Feinanteilerzeugung für Doppelbeutel-Verpackungen ohne Luftabsaugung, sowie für zwei erfindungsgemäße Beispiele. Tabelle 2 Vges / VSi Durchstoßung Feinanteil Ohne Luftabsaugung >3,4 häufig viel Beispiel 1 2,45-2,75 nein nein Beispiel 2 2,45-2,95 nein nein Table 2 shows the ratio V ges / V Si and the qualitative results in terms of piercing and fines production for double bag packaging without air extraction, as well as two examples of the invention. <b> Table 2 </ b> V ges / V Si puncturing fines Without air extraction > 3.4 often much example 1 2.45 to 2.75 No No Example 2 2.45 to 2.95 No No

Für den Primärbeutel gilt es, ein Verhältnis Vges / VSi von 2,0 bis 2,7, bevorzugt von 2,0 bis 2,4 zu erzeugen.For the primary bag, it is necessary to produce a ratio V ges / V Si of 2.0 to 2.7, preferably from 2.0 to 2.4.

Dadurch kann überraschender Weise eine feinanteil- u. durchstoßungsfreie Verpackung produziert werden.As a result, a finely divided u. piercing-free packaging are produced.

Für das in Innen- u. Außenbeutel verpackte Silicium ist Vges / VSi von 2,40 bis 3,0 wesentlich.For indoor and u. Outer bag-packed silicon is V ges / V Si of 2.40 to 3.0 is essential.

Die Luft kann mit diversen Verfahren aus einem mit Silicium gefüllten Kunststoffbeutel entfernt werden:

  • manuelles Drücken und anschließendem Verschweißen
  • Klemm- oder Stempelvorrichtung und anschließendem Verschweißen
  • Absaugvorrichtung u. anschließendem Verschweißen
  • Vakuumkammer u. anschließendem Verschweißen
The air can be removed from a silicon-filled plastic bag by various methods:
  • manual pressing and subsequent welding
  • Clamping or stamping device and subsequent welding
  • Suction device u. subsequent welding
  • Vacuum chamber u. subsequent welding

Die Umgebungsbedingungen beim Verpacken sind vorzugsweise eine Temperatur von 18-25 °C. Die relative Luftfeuchte beträgt vorzugsweise 30-70%.The environmental conditions during packaging are preferably a temperature of 18-25 ° C. The relative humidity is preferably 30-70%.

Es hat sich gezeigt, dass dadurch Kondenswasserbildung vermieden werden kann.It has been shown that this condensation can be avoided.

Vorzugsweise findet die Verpackung zudem in der Umgebung von gefilterter Luft statt.Preferably, the packaging also takes place in the vicinity of filtered air.

Claims (11)

Verfahren zum Verpacken von Polysilicium in Form von Bruchstücken durch Einfüllen der Bruchstücke in einen ersten Kunststoffbeutel, wobei der erste Kunststoffbeutel nach dem Einfüllen der Bruchstücke in einen zweiten Kunststoffbeutel eingebracht wird oder wobei bereits vor dem Einfüllen der Bruchstücke in den ersten Kunststoffbeutel der erste Kunststoffbeutel in den zweiten Kunststoffbeutel gesteckt ist, wodurch sich die Bruchstücke in einem Doppelbeutel befinden, der verschlossen wird, dadurch gekennzeichnet, dass die nach dem Einfüllen der Bruchstücke in den beiden Kunststoffbeuteln des Doppelbeutels befindliche Luft vor dem Verschließen des Doppelbeutels derart entfernt wird, dass das Gesamtvolumen des Doppelbeutels im Verhältnis zum Volumen der Bruchstücke 2,4 bis 3,0 beträgt.A method for packing polysilicon in the form of fragments by filling the fragments in a first plastic bag, wherein the first plastic bag is introduced into a second plastic bag after filling the fragments or even before the first pieces of plastic in the first plastic bag in the second plastic bag is inserted, whereby the fragments are in a double bag, which is closed, characterized in that the air after filling the fragments in the two plastic bags of the double bag air is removed before closing the double bag so that the total volume of the double bag in relation to the volume of the fragments 2.4 to 3.0. Verfahren nach Anspruch 1, wobei das Gesamtvolumen des ersten Kunststoffbeutels im Verhältnis zum Volumen der Bruchstücke 2,0 bis 2,7 beträgt.The method of claim 1, wherein the total volume of the first plastic bag is 2.0 to 2.7 in proportion to the volume of the fragments. Verfahren nach Anspruch 1 oder 2, wobei der erste Kunststoffbeutel so dimensioniert ist, dass die ihn bildende Kunststofffolie an den Bruchstücken eng anliegt.The method of claim 1 or 2, wherein the first plastic bag is dimensioned so that the plastic film forming it fits snugly against the fragments. Verfahren nach einem der Ansprüche 1 bis 3, wobei das Entfernen von Luft aus den Kunststoffbeuteln durch Zusammendrücken der Kunststoffbeutel, mittels einer Klemm- oder Stempelvorrichtung, mittels einer Absaugvorrichtung oder mittels einer Vakuumkammer erfolgt.Method according to one of claims 1 to 3, wherein the removal of air from the plastic bags by compressing the plastic bag, by means of a clamping or stamping device, by means of a suction device or by means of a vacuum chamber. Verfahren nach einem der Ansprüche 1 bis 4, wobei während des Verpackens eine relative Luftfeuchte 30-70% beträgt.Method according to one of claims 1 to 4, wherein during the packaging, a relative humidity of 30-70%. Verfahren nach einem der Ansprüche 1 bis 5, wobei jeder der beiden Kunststoffbeutel des Doppelbeutels nach dem Entfernen von Luft separat durch Verschweißen verschlossen wird.Method according to one of claims 1 to 5, wherein each of the two plastic bags of the double bag is sealed separately after the removal of air by welding. Verfahren nach einem der Ansprüche 1 bis 5, wobei die beiden Kunststoffbeutel des Doppelbeutels durch Verschweißen mittels einer gemeinsamen Schweißnaht verschlossen werden.Method according to one of claims 1 to 5, wherein the two plastic bags of the double bag are sealed by welding by means of a common weld. Verfahren nach einem der Ansprüche 1 bis 6, wobei nach dem Einfüllen von Bruchstücken in den ersten Kunststoffbeutel Luft aus dem ersten Kunststoffbeutel entfernt, der erste Kunststoffbeutel verschlossen und in den zweiten Kunststoffbeutel eingebracht wird, so dass der Doppelbeutel entsteht, und anschließend Luft aus dem zweiten Kunststoffbeutel entfernt wird und dieser verschlossen wird.Method according to one of claims 1 to 6, wherein after the filling of fragments in the first plastic bag, air is removed from the first plastic bag, the first plastic bag is closed and introduced into the second plastic bag, so that the double bag is formed, and then air from the second Plastic bag is removed and this is closed. Doppelbeutel, umfassend einen ersten und einen zweiten Kunststoffbeutel und Polysilicium in Form von Bruchstücken, das sich im ersten Kunststoffbeutel befindet, wobei der erste Kunststoffbeutel in den zweiten Kunststoffbeutel gesteckt ist, wobei beide Kunststoffbeutel verschlossen sind, wobei das Gesamtvolumen des Doppelbeutels im Verhältnis zum Volumen der Bruchstücke 2,4 bis 3,0 beträgt.A dual pouch comprising first and second plastic pouches and polysilicon in the form of debris located in the first plastic pouch, the first pouch being plugged into the second pouch, both pouches being closed, the total volume of the dumbbell being proportional to the volume of the pouch Fragments is 2.4 to 3.0. Doppelbeutel nach Anspruch 9, wobei das Gesamtvolumen des ersten Beutels im Verhältnis zum Volumen der Bruchstücke 2,0 bis 2,7 beträgt.The double bag of claim 9 wherein the total volume of the first bag is 2.0 to 2.7 in proportion to the volume of the debris. Doppelbeutel nach Anspruch 9 oder nach Anspruch 10, wobei der erste und der zweite Kunststoffbeutel durch Verschweißen verschlossen sind und eine gemeinsame Schweißnaht aufweisen.Double bag according to claim 9 or claim 10, wherein the first and second plastic bags are closed by welding and have a common weld.
EP13195295.4A 2012-12-14 2013-12-02 Packing polycrystalline silicon Active EP2743190B1 (en)

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US20140165503A1 (en) 2014-06-19
CA2836208C (en) 2015-06-23
JP2014122153A (en) 2014-07-03
JP5726984B2 (en) 2015-06-03
ES2562018T3 (en) 2016-03-02
MY171014A (en) 2019-09-23
KR101575933B1 (en) 2015-12-08
CN103863586A (en) 2014-06-18
TWI548567B (en) 2016-09-11
KR20140077822A (en) 2014-06-24
TW201422490A (en) 2014-06-16
CA2836208A1 (en) 2014-06-14
CN103863586B (en) 2016-03-23
US9550607B2 (en) 2017-01-24
DE102012223192A1 (en) 2014-06-18

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