WO2015132722A1 - Granulate, granulator and method of producing granulate - Google Patents

Granulate, granulator and method of producing granulate Download PDF

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Publication number
WO2015132722A1
WO2015132722A1 PCT/IB2015/051545 IB2015051545W WO2015132722A1 WO 2015132722 A1 WO2015132722 A1 WO 2015132722A1 IB 2015051545 W IB2015051545 W IB 2015051545W WO 2015132722 A1 WO2015132722 A1 WO 2015132722A1
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WO
WIPO (PCT)
Prior art keywords
size
granules
granulate
essentially
openings
Prior art date
Application number
PCT/IB2015/051545
Other languages
French (fr)
Inventor
Marc THOMETSCHEK
Original Assignee
Beologic Nv
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 Beologic Nv filed Critical Beologic Nv
Publication of WO2015132722A1 publication Critical patent/WO2015132722A1/en

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Classifications

    • 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
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/12—Powdering or granulating
    • 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
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/203—Solid polymers with solid and/or liquid additives

Definitions

  • the present invention relates to granulate comprising granules of thermoplastic material.
  • the present invention relates to a granulator comprising a sieve or mould containing openings for pressing through thermoplastic material in order to form granules.
  • the present invention also comprises a method of producing granulate.
  • Granulate to which the present invention relates is more specifically used to form mouldings by means of thermoplastic processes, such as pressing, extruding, co- extruding, injection-moulding, rotational moulding, etc.
  • thermoplastic processes such as pressing, extruding, co- extruding, injection-moulding, rotational moulding, etc.
  • granulate is pressurized and/or heated by means of heating elements and/or heated up through friction, resulting in a rise in temperature which is such that the granules melt.
  • the melted material can thus assume a desired shape and subsequently be cured in this desired shape.
  • This object of the invention is firstly achieved by providing granulate comprising granules of thermoplastic material in which the granulate comprises granules of different sizes or different shapes or a combination of both.
  • the granules contained in a granulate are of virtually the same shape and size.
  • Granulate according to the invention comprises granules of different sizes and/or shapes. If the granules contained in such a granulate are homogeneously mixed with each other, it is possible to achieve better results when producing mouldings, such as plates, profiled sections, injection-moulded products, etc. than using granulate comprising granules of virtually the same shape and size. Due to the different sizes and/or shapes, granulate according to the invention can be distributed more evenly. Mouldings produced therewith can thus be made more even. The bulk density of the granulate is higher than with existing granulate. Fewer openings remain between the granules when producing mouldings. As a result thereof, less air is present between the granules, so that less venting has to take place during the process. The stress on the resulting mouldings is thus reduced.
  • the granules melt at different points in time during the production of mouldings.
  • the press When producing mouldings in a press, the press is thus not heavily loaded all at once, but distributed over a period of time during which the different mouldings start to melt in succession. This results in better end products.
  • the screws in the machine which melts and pressurizes the granulates are susceptible to a high degree of wear in a certain zone.
  • a preferred embodiment of granulate according to the present invention comprises first granules having a first size as the largest size and second granules having a second size as the largest size, wherein the first size differs by more than 0.2 mm from the second size.
  • this first size differs by more than 0.5 mm from the second size. More preferably, the first size differs essentially by 1 mm from the second size.
  • a specific embodiment of granulate according to the present invention comprises essentially 25% of granules whose largest size is 1 mm, essentially 25% of granules whose largest size is 2 mm, essentially 25% of granules whose largest size is 3 mm and essentially 25% of granules whose largest size is 4 mm.
  • two or more different types of granules of different sizes and/or different shapes may be provided in these or other ratios.
  • the granules of granulate according to the present invention may have all kinds of shapes. More specifically, these may be, for example, spherical or cylindrical or cubical, conical or more bar- shaped, etc.
  • the same granulate may contain granules having one shape in different sizes or also granules having different shapes with respect to each other.
  • the granules are essentially cylindrical.
  • Granules of granulate according to the present invention may be made of all kinds of thermoplastic materials.
  • the granules are made of a composite. More specifically, this composite may comprise, for example, mineral and/or vegetable fibres, such as for example talcum, calcium, carbonate, etc. and/or hemp, bamboo, wood, straw, sisal, coconut, peas, etc. Still more specifically, the composite may be, for example, a wood composite (wood/plastic composite). More specifically, the granules may in this case be made using polyolefin as the plastic. Still more specifically, the granules may in this case be made using thermally modified wood as the wood.
  • the object of the present invention is furthermore also achieved by providing a granulator comprising a sieve or mould containing openings for pressing through thermoplastic material in order to form granules, wherein the sieve comprises openings of different sizes and/or shapes.
  • the openings comprise first openings having a first size as the largest size and second openings having a second size as the largest size, wherein the first size differs by more than 0.2 mm from the second size.
  • this first size differs by more than 0.5 mm from the second size. More preferably, the first size differs essentially by 1 mm from the second size.
  • the openings comprise essentially 25% of openings whose largest size is 1 mm, essentially 25% of openings whose largest size is 2 mm, essentially 25% of openings whose largest size is 3 mm and essentially 25% of openings whose largest size is 4 mm.
  • two or more different types of openings of different sizes and/or different shapes may be provided in these or other ratios.
  • the object of the present invention is furthermore also achieved by providing a method of producing granulate, wherein granules having a first size as the largest size are mixed with granules having a second size as the largest size to form a homogeneous mixture.
  • the object of the invention is also achieved by providing a method of producing a granulate, wherein granules of a first shape are mixed with granules of a second shape, different from the first shape, to form a homogeneous mixture.
  • a method of producing a granulate wherein granules of a first shape are mixed with granules of a second shape, different from the first shape, to form a homogeneous mixture.
  • the object of the present invention is also achieved by providing a method of producing granulate, wherein said granulate is produced by means of a granulator according to the present invention. Also by means of such a method according to the present invention, it is possible to produce granulate according to the present invention.
  • the present invention will now be explained in more detail by means of the following detailed description of some embodiments of granulate, a granulator and a method according to the present invention.
  • the sole aim of this description is to give illustrative examples and to indicate further advantages and particulars, and can therefore by no means be interpreted as a limitation of the area of application of the invention or of patent rights defined in the claims.
  • the indicated examples illustrate that granulate, granulators and methods according to the present invention may be provided in an endless number of variants.
  • a number of pill- shaped granules having a size of essentially 3 mm between the extremities of the pill shape are provided.
  • an amount of spherical granules is provided having a diameter of essentially 1 mm.
  • Both types of granules are produced by mixing particles of wood fibres and cured binding agent, which originate from MDF or HDF mouldings, with a polymer.
  • the ratio between the amounts is as follows: 1/3 of pill-shaped granules is added to 2/3 of spherical granules. These granules are homogeneously mixed with each other to form a granulate according to the present invention.
  • a sieve or mould for a granulator is provided with 40% of round openings having a 4 mm diameter, 30% of round openings having a 2 mm diameter and 30% of round openings having a 1 mm diameter, all evenly distributed.
  • This sieve or mould is placed in a granulator.
  • thermoplastic material comprising essentially 50% thermally modified wood and essentially 50% polyolefin, is introduced and granulated to form granules.
  • the granules which are produced in this way form a granulate according to the present invention.
  • the sieve may also be provided with openings having different shapes and/or different sizes and/or in different ratios and/or differently distributed, etc. and the granulated material may be different from thermoplastic material.

Abstract

The present invention relates to granulate comprising granules of thermoplastic material of different sizes. In addition, the present invention relates to a granulator comprising a sieve containing openings of different sizes for pressing through thermoplastic material in order to form granules. Furthermore, the present invention relates to a method of producing granulate, wherein granules having a first size are mixed with granules having a second size, different from the first size, to form a homogeneous mixture.

Description

GRANULATE, GRANULATOR AND METHOD
OF PRODUCING GRANULATE
The present invention relates to granulate comprising granules of thermoplastic material.
In addition, the present invention relates to a granulator comprising a sieve or mould containing openings for pressing through thermoplastic material in order to form granules.
Furthermore, the present invention also comprises a method of producing granulate.
Granulate to which the present invention relates is more specifically used to form mouldings by means of thermoplastic processes, such as pressing, extruding, co- extruding, injection-moulding, rotational moulding, etc. In these processes, granulate is pressurized and/or heated by means of heating elements and/or heated up through friction, resulting in a rise in temperature which is such that the granules melt. The melted material can thus assume a desired shape and subsequently be cured in this desired shape.
It is the object of the present invention to provide improved granulate.
This object of the invention is firstly achieved by providing granulate comprising granules of thermoplastic material in which the granulate comprises granules of different sizes or different shapes or a combination of both. With existing granulates, the granules contained in a granulate are of virtually the same shape and size.
Granulate according to the invention comprises granules of different sizes and/or shapes. If the granules contained in such a granulate are homogeneously mixed with each other, it is possible to achieve better results when producing mouldings, such as plates, profiled sections, injection-moulded products, etc. than using granulate comprising granules of virtually the same shape and size. Due to the different sizes and/or shapes, granulate according to the invention can be distributed more evenly. Mouldings produced therewith can thus be made more even. The bulk density of the granulate is higher than with existing granulate. Fewer openings remain between the granules when producing mouldings. As a result thereof, less air is present between the granules, so that less venting has to take place during the process. The stress on the resulting mouldings is thus reduced.
Due to the different sizes and/or shapes, the granules melt at different points in time during the production of mouldings.
When producing mouldings in a press, the press is thus not heavily loaded all at once, but distributed over a period of time during which the different mouldings start to melt in succession. This results in better end products.
When extruding or injection-moulding mouldings, the screws in the machine which melts and pressurizes the granulates are susceptible to a high degree of wear in a certain zone. This is mainly the zone where the granules change from solid form to liquid form. Due to the different sizes and/or shapes of granules, the latter will now change from solid to liquid or less solid form at different points in time. As a result thereof, this zone becomes larger, thus reducing the load thereon locally. Wear now occurs in a larger zone, but this is significantly less strong, thus greatly increasing the total service life of the screws.
A preferred embodiment of granulate according to the present invention comprises first granules having a first size as the largest size and second granules having a second size as the largest size, wherein the first size differs by more than 0.2 mm from the second size. Preferably, this first size differs by more than 0.5 mm from the second size. More preferably, the first size differs essentially by 1 mm from the second size.
A specific embodiment of granulate according to the present invention comprises essentially 25% of granules whose largest size is 1 mm, essentially 25% of granules whose largest size is 2 mm, essentially 25% of granules whose largest size is 3 mm and essentially 25% of granules whose largest size is 4 mm. Alternatively, two or more different types of granules of different sizes and/or different shapes may be provided in these or other ratios.
The granules of granulate according to the present invention may have all kinds of shapes. More specifically, these may be, for example, spherical or cylindrical or cubical, conical or more bar- shaped, etc. The same granulate may contain granules having one shape in different sizes or also granules having different shapes with respect to each other. In a specific embodiment of granulate according to the present invention, the granules are essentially cylindrical.
Granules of granulate according to the present invention may be made of all kinds of thermoplastic materials. In a particularly preferred embodiment, the granules are made of a composite. More specifically, this composite may comprise, for example, mineral and/or vegetable fibres, such as for example talcum, calcium, carbonate, etc. and/or hemp, bamboo, wood, straw, sisal, coconut, peas, etc. Still more specifically, the composite may be, for example, a wood composite (wood/plastic composite). More specifically, the granules may in this case be made using polyolefin as the plastic. Still more specifically, the granules may in this case be made using thermally modified wood as the wood.
The object of the present invention is furthermore also achieved by providing a granulator comprising a sieve or mould containing openings for pressing through thermoplastic material in order to form granules, wherein the sieve comprises openings of different sizes and/or shapes.
By means of such a granulator, it is possible to directly produce granulate according to the present invention.
In a preferred embodiment of a granulator according to the present invention, the openings comprise first openings having a first size as the largest size and second openings having a second size as the largest size, wherein the first size differs by more than 0.2 mm from the second size. Preferably, this first size differs by more than 0.5 mm from the second size. More preferably, the first size differs essentially by 1 mm from the second size.
In a specific embodiment of a granulator according to the present invention, the openings comprise essentially 25% of openings whose largest size is 1 mm, essentially 25% of openings whose largest size is 2 mm, essentially 25% of openings whose largest size is 3 mm and essentially 25% of openings whose largest size is 4 mm.
Alternatively, two or more different types of openings of different sizes and/or different shapes may be provided in these or other ratios.
The object of the present invention is furthermore also achieved by providing a method of producing granulate, wherein granules having a first size as the largest size are mixed with granules having a second size as the largest size to form a homogeneous mixture. By means of such a method, it is possible to produce granulate according to the present invention.
In addition, the object of the invention is also achieved by providing a method of producing a granulate, wherein granules of a first shape are mixed with granules of a second shape, different from the first shape, to form a homogeneous mixture. By means of such a method, it is also possible to produce granulate according to the present invention.
Finally, the object of the present invention is also achieved by providing a method of producing granulate, wherein said granulate is produced by means of a granulator according to the present invention. Also by means of such a method according to the present invention, it is possible to produce granulate according to the present invention. The present invention will now be explained in more detail by means of the following detailed description of some embodiments of granulate, a granulator and a method according to the present invention. The sole aim of this description is to give illustrative examples and to indicate further advantages and particulars, and can therefore by no means be interpreted as a limitation of the area of application of the invention or of patent rights defined in the claims. The indicated examples illustrate that granulate, granulators and methods according to the present invention may be provided in an endless number of variants.
Example 1
A number of pill- shaped granules having a size of essentially 3 mm between the extremities of the pill shape are provided.
In addition, an amount of spherical granules is provided having a diameter of essentially 1 mm.
Both types of granules are produced by mixing particles of wood fibres and cured binding agent, which originate from MDF or HDF mouldings, with a polymer.
The ratio between the amounts is as follows: 1/3 of pill-shaped granules is added to 2/3 of spherical granules. These granules are homogeneously mixed with each other to form a granulate according to the present invention.
In alternative examples, it is also possible to mix granules having different sizes and/or having different shapes and/or in different ratios and/or made of different materials, etc. with one another in order to produce a granulate according to the present invention.
Example 2
A sieve or mould for a granulator is provided with 40% of round openings having a 4 mm diameter, 30% of round openings having a 2 mm diameter and 30% of round openings having a 1 mm diameter, all evenly distributed. This sieve or mould is placed in a granulator. Into this granulator, thermoplastic material, comprising essentially 50% thermally modified wood and essentially 50% polyolefin, is introduced and granulated to form granules. The granules which are produced in this way form a granulate according to the present invention. In alternative examples, the sieve may also be provided with openings having different shapes and/or different sizes and/or in different ratios and/or differently distributed, etc. and the granulated material may be different from thermoplastic material.

Claims

C L A I M S
Granulate comprising granules of thermoplastic material, characterized in that the granulate comprises granules of different sizes and/or shapes.
Granulate according to Claim 1, characterized in that the granulate comprises first granules having a first size as the largest size and second granules having a second size as the largest size, wherein the first size differs by more than 0.2 mm from the second size.
Granulate according to Claim 2, characterized in that the first size differs by more than 0.5 mm from the second size.
Granulate according to Claims 2 and 3, characterized in that the first size differs essentially by 1 mm from the second size.
Granulate according to any of Claims 1 to 4, characterized in that the granulate comprises essentially 25% of granules whose largest size is 1 mm, essentially 25% of granules whose largest size is 2 mm, essentially 25% of granules whose largest size is 3 mm and essentially 25% of granules whose largest size is 4 mm.
Granulate according to one of the preceding claims, characterized in that the granules are essentially cylindrical.
Granulate according to one of the preceding claims, characterized in that the granules are made from a wood composite.
Granulate according to Claim 7, characterized in that the granules are made using thermally modified wood and polyolefin.
9. Granulator comprising a sieve or mould containing openings for pressing through thermoplastic material in order to form granules, characterized in that the sieve or mould comprises openings of different sizes and/or shapes. 10. Granulator according to Claim 9, characterized in that the openings comprise first openings having a first size as the largest size and comprises second openings having a second size as the largest size, wherein the first size differs by more than 0.2 mm from the second size. 11. Granulator according to Claim 10, characterized in that the first size differs by more than 0.5 mm from the second size.
12. Granulator according to Claim 10 and 11, characterized in that the first size differs essentially by 1 mm from the second size.
13. Granulator according to one of Claims 9 to 12, characterized in that the openings comprise essentially 25% of openings whose largest size is 1 mm, essentially 25% of openings whose largest size is 2 mm, essentially 25% of openings whose largest size is 3 mm and essentially 25% of openings whose largest size is 4 mm.
14. Method of producing granulate, characterized in that granules having a first size as the largest size are mixed with granules having a second size as the largest size to form a homogeneous mixture, in which the second size differs from the first size.
15. Method of producing a granulate, characterized in that granules of a first shape are mixed with granules of a second shape, different from the first shape, to form a homogeneous mixture.
16. Method of producing granulate, characterized in that said granulate is produced by means of a granulator according to one of Claims 9 to 13.
PCT/IB2015/051545 2014-03-05 2015-03-03 Granulate, granulator and method of producing granulate WO2015132722A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2014/0148 2014-03-05
BE2014000148 2014-03-05

Publications (1)

Publication Number Publication Date
WO2015132722A1 true WO2015132722A1 (en) 2015-09-11

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110107941A1 (en) * 2008-06-27 2011-05-12 Institut National Polytechnique De Toulouse (Inpt) Coating material for road construction
CN102470199A (en) * 2009-07-06 2012-05-23 保罗·哈特曼股份公司 Device for the vacuum therapy of wounds

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110107941A1 (en) * 2008-06-27 2011-05-12 Institut National Polytechnique De Toulouse (Inpt) Coating material for road construction
CN102470199A (en) * 2009-07-06 2012-05-23 保罗·哈特曼股份公司 Device for the vacuum therapy of wounds

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