EP3216905B1 - Weldable spun-bonded fabric, method for the preparation of a weldable spun-bonded fabric and package - Google Patents
Weldable spun-bonded fabric, method for the preparation of a weldable spun-bonded fabric and package Download PDFInfo
- Publication number
- EP3216905B1 EP3216905B1 EP16159620.0A EP16159620A EP3216905B1 EP 3216905 B1 EP3216905 B1 EP 3216905B1 EP 16159620 A EP16159620 A EP 16159620A EP 3216905 B1 EP3216905 B1 EP 3216905B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filaments
- spunbond
- weldable
- component
- spunbonded
- 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.)
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Links
- 238000000034 method Methods 0.000 title claims description 18
- 239000004744 fabric Substances 0.000 title description 36
- 238000004806 packaging method and process Methods 0.000 claims description 99
- 239000004033 plastic Substances 0.000 claims description 65
- 229920003023 plastic Polymers 0.000 claims description 65
- 238000002844 melting Methods 0.000 claims description 47
- 239000000945 filler Substances 0.000 claims description 46
- 230000008018 melting Effects 0.000 claims description 35
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 32
- 238000003466 welding Methods 0.000 claims description 26
- 238000003490 calendering Methods 0.000 claims description 18
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 14
- -1 alkaline earth metal salt Chemical class 0.000 claims description 10
- 239000012815 thermoplastic material Substances 0.000 claims description 6
- 238000004049 embossing Methods 0.000 claims description 4
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 2
- 159000000007 calcium salts Chemical class 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 230000008021 deposition Effects 0.000 claims 1
- 239000000306 component Substances 0.000 description 120
- 239000004745 nonwoven fabric Substances 0.000 description 54
- 239000008358 core component Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000003860 storage Methods 0.000 description 8
- 239000004568 cement Substances 0.000 description 7
- 229920000098 polyolefin Polymers 0.000 description 7
- 229920001155 polypropylene Polymers 0.000 description 6
- 239000003570 air Substances 0.000 description 5
- 239000002985 plastic film Substances 0.000 description 5
- 229920006255 plastic film Polymers 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 241001016380 Reseda luteola Species 0.000 description 3
- 239000011258 core-shell material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920005606 polypropylene copolymer Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 241001136792 Alle Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000012963 UV stabilizer Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
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- 239000000155 melt Substances 0.000 description 1
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Images
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
-
- 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
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
-
- 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
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
-
- 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
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/34—Core-skin structure; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C23/00—Making patterns or designs on fabrics
- D06C23/04—Making patterns or designs on fabrics by shrinking, embossing, moiréing, or crêping
-
- 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
- B65D2565/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D2565/38—Packaging materials of special type or form
- B65D2565/381—Details of packaging materials of special type or form
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2505/00—Industrial
- D10B2505/10—Packaging, e.g. bags
Definitions
- the invention relates to a weldable spunbonded nonwoven fabric, in particular a weldable spunbonded nonwoven fabric as a component of packaging or packaging sacks, wherein the spunbonded nonwoven fabric has endless filaments which preferably consist of thermoplastic material.
- the invention further relates to a process for the production of a weldable spunbond or packaging spunbond web.
- spunbonded nonwoven filaments are used.
- continuous filaments differ because of their quasi-endless length of staple fibers, which have much smaller lengths of, for example, 10 mm to 60 mm. It is within the scope of the invention that a spunbonded nonwoven or spunbonded nonwoven according to the invention is produced by means of a spunbond process as a spunbond nonwoven.
- spunbonded nonwovens or packaging spunbonded nonwovens for packaging walls - in particular of bag-shaped packaging - are known from practice in various embodiments.
- the spunbonded nonwovens can be used separately as packaging walls or as part of a laminate for the packaging walls.
- laminates of spunbonded nonwovens and plastic films are known for this purpose.
- Spunbonded or spunbonded nonwoven packaging walls are also known, in particular, for sack-shaped packages for bulk goods with filling weights of 25 to 500 kg. Spun nonwovens are also used for cement sacks in this context.
- a bag-shaped packaging based on a spunbonded fabric is expediently carried out as follows. From the spunbond is initially produces a tube (so-called "tube") and thereby opposite side ends of the nonwoven web are connected to each other, in particular welded together. Then the tube is cut to the desired bag length, the resulting product is folded or folded and then a bottom sheet is placed as a bottom component and a lid sheet as a lid component and then welded to the bag body.
- a tube so-called "tube”
- the previously known or prepared in the manner described above sack-shaped packaging can often be in terms of strength to be desired.
- the spunbonded fabrics used for the production of the known packaging bags leave something to be desired in terms of their processability. This relates in particular to the weldability or sealability of the spunbonded nonwovens in the production of a packaging or a packaging sack.
- the continuous filaments of the spunbonded nonwoven may contain a filler, the filler content being> 10% by weight.
- the continuous filaments can be monocomponent filaments or multicomponent filaments.
- the multicomponent filaments may be in core-shell configuration or in side-by-side configuration.
- the spunbonded nonwovens described here are not intended as packaging spun nonwovens or not for packaging.
- the continuous filaments or at least one component of the continuous filaments of the weldable spunbonded nonwoven fabric in particular the weldable packaging spunbonded nonwoven 4 to 25 wt .-% of the filler, preferably 5 to 20 wt .-% and very preferably 6 to 15 wt .-% of the filler.
- the individual proportions of the constituents of the endless filaments - in particular the plastic component or the plastic components of the continuous filaments - add up to a total of 100 wt .-% with the proportion of the filler.
- the filler is at least one metal salt and preferably at least one alkaline earth metal salt.
- a particularly recommended embodiment of the invention is characterized in that the filler is a calcium salt and most preferably the filler is calcium carbonate. Calcium carbonate has proved to be particularly useful as a filler for the weldable spunbonded fabric according to the invention for solving the technical problem. Basically, calcium sulfate can also be used as a filler.
- the continuous filaments of the weldable spunbonded nonwoven fabric are formed as multicomponent filaments, in particular as bicomponent filaments.
- the filler is contained in a plastic component arranged on the outer surface of the multicomponent filaments or bicomponent filaments.
- a first plastic component arranged on the surface of the multicomponent filaments or the bicomponent filaments has the same, preferably a lower melting point, than at least one second plastic component of the multicomponent filaments or bicomponent filaments.
- the filler is contained at least in the lower melting plastic component or contained only in the first equal melting plastic component.
- the multicomponent filaments or the bicomponent filaments of the weldable spunbonded web have a core-sheath configuration.
- the filler is expediently contained in the sheath component of these multicomponent filaments or bicomponent filaments.
- the equal or lower melting plastic component of the multicomponent filaments or bicomponent filaments of the weldable spunbonded nonwoven fabric is the sheath component and the filler is then contained at least in this sheath component or substantially or merely contained in the sheath component.
- the filler is arranged in a plastic component of the bicomponent filaments or multi-component filaments which is located on the surface of the filaments.
- this is the lower melting plastic component in the filament and most preferably, the lower melting component is the sheath component of a core-sheath configuration of the bicomponent filaments.
- the filler - especially the calcium carbonate - arranged in the arranged on the surface of the filaments - preferably lower melting plastic component, preferably contained in the lower melting plastic component in the jacket of the bicomponent filaments or multicomponent filaments.
- the filler or the calcium carbonate is expediently distributed homogeneously or essentially homogeneously in the plastic component or arranged on the outer surface or essentially on the outer surface of the plastic component.
- the proportion of the sheath component in relation to the core component is higher in the case of multicomponent filaments or bicomponent filaments of spunbonded webs or spunbonded areas intended for welding than in the case of multicomponent filaments or bicomponent filaments of spunbonded webs or spunbonded web areas that are not intended for welding.
- a particularly preferred embodiment of the invention is characterized in that the weldable spunbonded fabric is a calendered spunbonded nonwoven. Empfohlene admir a surface of this spunbond is calendered smooth and a surface profiled calendered. But it can also be calendered smoothly both surfaces of the spunbonded fabric. It is within the scope of the invention that the ratio of the strength or tensile strength of the weldable spunbonded fabric in the machine direction (MD) to the strength or tensile strength of the spunbonded material transversely to the machine direction (CD) is either equal to 1 or greater than 1, preferably greater than 1 , 1 and more preferably greater than 1.2.
- Machine direction means in particular the conveying direction of the deposited spunbonded on a shelf or on a storage device.
- a weldable spunbonded fabric according to the invention is produced by the following method: First, continuous filaments are spun by means of a spinnerette and Subsequently, these filaments are cooled in a cooling device and then stretched by means of a drawing device and then deposited on a storage device for spunbonded.
- the weldable spunbonded or weldable spunbonded nonwoven fabric according to the invention is produced as a spunbond nonwoven by a spunbond process.
- the cooling device is subdivided into at least two cabin sections arranged one above the other or in the direction of filament flow, wherein cooling air with different convective heat removal capacities - in particular cooling air with different temperatures - is introduced into the filament flow space from these cabin sections.
- the cooling device has only two such one above the other or in Filamentströmungsraum successively arranged cabin sections.
- the cooling device is connected via an intermediate channel - in particular via an intermediate channel converging in the direction of filament flow - to a draw channel of the drawing device.
- the endless filaments are thus guided through the cooling device, then through the intermediate channel and then through the lower channel.
- the filaments are deposited to the spunbonded web or spunbonded on a storage device, which is preferably designed as Ablagesiebband or endlessly circulating Ablagesiebband.
- a particularly recommended embodiment of the method and the device for producing a weldable spunbonded fabric according to the invention is characterized in that the aggregate of cooling device, intermediate channel and connected thereto Unterziehkanal is designed as a closed unit and that except the supply of cooling air in the cooling device no further air supply takes place in this closed unit.
- weldable spunbonded preferably that between the underrun channel and the storage device at least one diffuser is arranged, through which the filaments are guided in Filamentströmungscardi to the storage device out.
- at least two diffusers, preferably two diffusers in the filament flow direction are arranged one behind the other between the lower draw channel and the storage device.
- a recommended embodiment of the invention is characterized in that the filaments are guided in the region of the spinnerette or between the spinnerette and the cooling device by a Monosabsaugungsvorraum.
- the gases exiting the filaments in the form of monomers, oligomers, decomposition products and the like are removed from the filament forming space below the spinnerette or apparatus.
- the spun-bonded non-woven fabric deposited from the endless filaments is preconsolidated or solidified with at least one calender.
- the calendering can take place inline or offline. It is recommended that a calender for such calendering have an embossing area of from 10 to 90%, and preferably from 15 to 35%, and more preferably from 18 to 30%.
- only one of two calender rolls has an engraving and preferably the stamping surface specified above, and the opposite or associated calender roll is smooth or substantially smooth and without engraving.
- the embossing depth of the calender engraving is preferably 0.1 to 0.8 mm, preferably 0.1 to 0.6 mm and very preferably 0.2 to 0.4 mm.
- the number of engraved points of a calender roll or the calender roll with engraving is greater than 30 / cm 2 and preferably greater than 40 / cm 2 . Particularly preferably, the number of engraved points of a calender roll or calender roll with engraving is more than 45 / cm 2 . According to In a proven embodiment, the engraving points of a calender roll or the calender roll engraved in plan view diamond shape. According to a further embodiment, the spunbonded nonwoven according to the invention is calendered with a calender of two calender rolls with a smooth surface.
- the calendering of a spunbonded nonwoven according to the invention can also take place with a belt calender.
- a variant is characterized in that the calendering is performed at least two stages or two stages.
- the deposited spunbonded fabric is first calendered with a calender or with a standard calender, which has an engraving, preferably the engraving explained above.
- the spunbonded fabric is then calendered with a calender of two calender rolls with a smooth surface or calendered with a belt calender.
- a surface may be plastic coated and a surface of steel or substantially consist of steel.
- the above-explained calendering of the spunbonded fabric has proven particularly suitable with regard to the solution of the technical problem according to the invention.
- calendered or preconsolidated / solidified spunbonded nonwovens can be particularly advantageous welded or welded into packages.
- the spunbonded nonwovens produced according to the invention can be easily and simply combined or coated in the course of the production of packaging with other layers, in particular with plastic films and / or meltblown webs or other spunbond nonwovens.
- spunbonded nonwoven fabric or weldable spunbonded nonwoven fabric according to a spunbond process explained above has proven particularly useful in the context of the invention.
- spunbonded nonwovens with optimized filing quality can be obtained, and very homogeneous spunbonded nonwovens can be produced.
- the spunbond storage can be optimized insofar as thin areas and thick areas in the spunbonded fabric are considerably reduced in comparison to other known methods.
- the span between the lightest thin spot and the lightest analyzed square and The heaviest thick spot or the heaviest analyzed square are significantly reduced compared to other known manufacturing processes.
- the span can be lowered, for example, from about 30 g / m 2 in other known methods to about 15 g / m 2 in the method used in the invention.
- the invention is based on the finding that the spunbond nonwovens prepared as described above can be excellently processed into packaging, for example into packaging sacks, and in particular can be welded simply and easily.
- the invention is further based on the finding that the welding temperature for welding these spunbonded nonwovens or packaging spunbonded nonwovens according to the invention can be markedly reduced in comparison with the spunbonded nonwoven webs produced by other known processes.
- This advantageous lowering of the welding temperature results especially in combination with the filler according to the invention, in particular in the form of calcium carbonate.
- the produced according to the preferred method used Weldable spunbonded webs advantageously have fewer thin spots than other spunbonded webs, and consequently hardly any thin spots during welding can be damaged.
- the spunbonded nonwovens produced according to the invention are distinguished by optimum processability, in particular weldability, and to that extent they have optimum basic prerequisites for the production of packaging.
- Spunbond nonwovens in which the ratio of the strength or tensile strength of the spunbond MD in the machine direction (MD) to the strength or tensile strength of the spunbond cross-machine direction (CD) is equal to 1 or greater than 1 have particularly advantageous properties for the production of packaging. is preferably greater than 1.1, preferably greater than 1.2, and more preferably greater than 1.25. - The explained preferred features of the spunbonded nonwoven fabric according to the invention and the method for producing the spunbonded nonwoven and the advantages achieved thereby combine optimally with the filler according to the invention or with the filler content according to the invention and the advantages achieved thereby.
- the flat lid component and / or the flat bottom component of the packaging consists / consist of at least one spunbonded nonwoven fabric or respectively of a spunbonded nonwoven fabric according to the invention and preferably of the same spunbonded nonwoven material as the rest of the packaging wall or sidewall.
- the monocomponent filaments when used for a weldable spunbonded web of the present invention, the monocomponent filaments it is recommended that at least 5% by weight of filler or calcium carbonate, preferably at least 7% by weight, expediently 7 to 25% by weight, preferably 8 to 22% by weight and very preferably 10 to 20% by weight of filler or to calcium carbonate as a filler. It is within the scope of the invention that the filler is homogeneously or substantially homogeneously distributed in the continuous filaments or is arranged according to the recommended embodiment at least on the surface of the continuous filaments or substantially on the surface of the endless filaments.
- spunbonded nonwoven multi-component filaments or bicomponent filaments with a first or lower melting plastic component on the outer surface are used for the side wall and for the flat lid component and / or the flat bottom component of the packaging wall
- a particularly preferred embodiment of the invention is characterized in that the spun nonwovens have for the flat lid component and / or for the flat bottom component a higher proportion of the first or lower melting plastic component than the spunbond or the spunbonded fabric for the side wall of the packaging wall.
- the proportion of the arranged on the outer surface of the multicomponent or bicomponent filaments first or lower melting plastic component in the spunbonded nonwoven for the flat lid component and / or for the flat bottom component 1.2 times to 3.5 times, preferably 1.5 times to 2.5 times as large as the proportion of the first or lower melting plastic component in the multicomponent or bicomponent filaments of the spunbonded nonwoven or the spunbonded nonwoven for the side wall of the packaging.
- the melting points of the two plastic components may also be the same or substantially the same.
- a particularly preferred embodiment of the invention is characterized in that a spunbonded fabric or spunbonded nonwoven according to the invention is / are part of a package wall laminate and that the laminate preferably has at least one film, preferably a plastic film, in addition to the spunbonded nonwoven.
- both the side wall and the flat lid component and / or the flat bottom component of the packaging wall can be designed as such a packaging wall laminate.
- a highly recommended embodiment of the invention is characterized in that the film or the plastic film of the laminate is arranged on the inside of the packaging wall.
- the packaging - in particular a packaging bag - has a flat lid component which is part of the packaging wall and at least one - suitably specified above - weldable spunbonded and that the spunbonded the lid component with the side wall or with the spunbonded material of the side wall of the packaging is firmly connected, in particular welded.
- the spunbonded fabric of the cover component comprises multicomponent filaments or bicomponent filaments or consists essentially of multicomponent filaments or bicomponent filaments and that the mass ratio of the first or lower melting plastic component arranged on the outer surface of the filaments to the at least a second or higher melting plastic component 35: 65 to 50: 50 and preferably 40: 60 to 45: 55.
- the melting points of the two plastic components can also be the same or substantially the same.
- the packaging - in particular the packaging bag - at least a flat bottom component, which is part of the packaging wall and at least one - has a spunbond or packing spunbonded - in particular a specified in more detail above.
- This spunbond or packaging spunbonded web forms the bottom component and / or is a component of the bottom component.
- the at least one spunbonded fabric of the bottom component is preferably firmly connected to the side wall or with the spunbonded material of the side wall of the packaging, preferably welded.
- the invention is based on the finding that a weldable spunbonded fabric or weldable packaging spunbonded fabric according to the invention can be produced in a simple, inexpensive and problem-free manner and can be processed into packages, in particular by being welded.
- the welding temperatures required during welding of the spunbonded nonwovens can be significantly reduced in comparison with the processing measures known from practice. Above all, it is possible to work with a homogeneous welding temperature.
- the invention is further based on the finding that in the spunbonded nonwoven fabric according to the invention for problematic problematic thin areas and thick areas can be largely avoided.
- the invention is based on the finding that the above Benefits in particular by the combination of the filler according to the invention - in particular of the calcium carbonate - on the one hand with the realization of the inventive spunbond process on the other hand come about.
- the invention is based on the finding that the filler according to the invention, in particular in the form of calcium carbonate, requires better weldability of the spunbonded nonwoven. It is assumed that the filler or the calcium carbonate on the one hand absorbs less heat than the associated plastic component and on the other hand at the same time has a higher thermal conductivity than the plastic. The result of this is that the filler or the calcium carbonate metered in can transfer the heat introduced to the plastic to be melted or softened, so that the associated plastic component can be melted in a targeted manner.
- the invention is also based on the finding that a filler in the form of calcium carbonate improves the UV stability of the filaments or spunbonded nonwovens.
- the optimum processability or weldability of a weldable spunbonded fabric according to the invention furthermore results from the advantageous filing quality of the filaments or the spunbonded fabric when the spunbond process according to the invention is realized.
- a substantially better homogeneity of the spunbonded fabric is achieved in comparison to other known methods, and as a result the processing temperature or welding temperature for the spunbonded nonwovens according to the invention can be considerably reduced in comparison to known nonwoven fabrics.
- the spunbonded nonwovens according to the invention and the packages produced therefrom have excellent strength. This applies both to the packaging wall itself and to connecting seams - in particular welded seams - between packaging wall regions.
- the packaging wall and the connecting seams between the packaging wall regions are characterized by high mechanical resistance.
- a tearing open of the packaging wall is barely observed in contrast to the packaging bags known from practice.
- a weldable spunbonded fabric according to the invention or a packaging produced therefrom have further advantages. On the one hand, themaschineswandung can be cleaned without major problems, especially to be cleaned from the outside.
- the packaging is also characterized by an attractive exterior visual appearance. Furthermore, in the case of a weldable spunbonded fabric produced according to the invention or in the case of the packaging produced therefrom, excellent barrier effects can be set, so that in particular an additional outer coating of the packaging is not required.
- Fig. 1 is a packaging in the form of a packaging bag 1 for bulk materials - in particular for cement - shown.
- the packaging wall of this packaging bag 1 has weldable spun nonwovens 2 according to the invention.
- These spunbonded nonwovens 2 or packaging spunbonded nonwovens consist of filaments 3 made of thermoplastic material.
- the continuous filaments 3 contain at least 3% by weight of a filler 4 in the form of calcium carbonate for improving the weldability of the filaments or the spunbonded fabric 2 and in particular for reducing the welding temperature during the thermal welding of the filaments or the spunbonded fabric 2.
- the in Fig. 1 illustrated packaging bag 1 has a side wall 5 of a spunbonded fabric according to the invention, which was welded with its side ends 6 as it were to a tube.
- a flat bottom component 7 in the form of a spunbonded fabric 2 according to the invention is arranged and welded to the side wall 5 of the packaging bag 1.
- a flat lid component 8 in the form of a spunbonded nonwoven 2 according to the invention is arranged and with the side wall 5 welded.
- a plastic film can still be arranged, however, in the embodiment according to Fig. 1 not shown.
- the spunbonded nonwovens used for the side wall 5, the bottom component 7 and the cover component 8 of the packaging bag 1 preferably and in the exemplary embodiment consist of bicomponent filaments with a core-shell configuration (see also FIG Fig. 3 ).
- the lower-melting plastic component is the sheath component 9 and the higher-melting plastic component is the core component 10.
- the filler 4 in the form of calcium carbonate is preferred and in the exemplary embodiment only contained in the sheath component 9 of the bicomponent filaments.
- Fig. 2 is a particularly preferred apparatus for producing the spunbonded nonwovens 2 (spunbond nonwovens) according to the invention.
- the endless filaments 3 are first spun here by means of a spinnerette 11 and then passed through a monomer extraction device 12. Subsequently, the endless filaments 3 in the cooling device 13 are cooled.
- the cooling device 13 preferably and in the exemplary embodiment has two cabin sections 14, 15 arranged one above the other or in the filament flow direction, from which cooling air of different temperature is introduced into the filament flow space. Following the cooling device 13, the endless filaments 3 pass into the intermediate channel 16 converging in the filament flow direction. An underrun channel 17 of the drawing device 18 adjoins this intermediate channel 16. This configuration is used for stretching the endless filaments 3.
- the continuous filaments 3 emerging from the underrun channel 17 are then preferred and, in the exemplary embodiment, by two diffusers 19, 20 arranged one above the other or in the filament flow direction guided. Empfohlenenuit and in the embodiment, an ambient air inlet gap 25 is provided between the diffusers 19, 20, can penetrate through the ambient air.
- the endless filaments 3 are then deposited on the filing belt 21 designed as a storage device for spunbonded fabric 2. The spunbonded nonwoven 2 is conveyed away in the machine direction M by means of the filing screen belt 21.
- the spun-bonded nonwoven 2 is calendered or preconsolidated / solidified by means of a calender 22.
- a calender roll 23 is provided with an engraving, not shown, and an interacting or associated calender roll 24 of the calender 22 is preferably and in the embodiment equipped with a smooth surface.
- a spunbonded fabric 2 produced in the manner explained can be used simply and easily for a packaging wall (side wall 5 and / or bottom component 7 and / or cover component 8) of the packaging sack 1.
- Fig. 3 are bicomponent filaments for a weldable spunbonded fabric 2 according to the invention.
- the proportion of the core component 10 is greater than that of the shell component 9.
- the filler in the form of calcium carbonate is in the bicomponent filaments according to FIG Fig. 3 contained exclusively in the shell component 9, which corresponds to the lower-melting plastic component.
- the bicomponent filaments according to Fig. 3a are particularly suitable for spunbonded fabrics 2, which form the side wall 5 of a packaging bag 1.
- the bicomponent filaments according to Fig. 3b a much higher proportion of the shell component 9 or the lower melting Plastic component on.
- the filler is preferred and included in the exemplary embodiment exclusively in the shell component 9.
- the bicomponent filaments according to Fig. 3b are especially suitable for spunbonded nonwovens 2 or spunbonded areas, which must be welded.
- the sheath component 9 with the lower-melting plastic component provides sufficient welding material. The welding is preferably carried out with the proviso that only or substantially the shell component 9 melts or is welded.
- the bicomponent filaments are suitable according to Fig. 3b especially for the floor component 7 to be welded and / or for the cover component 8 of a packaging bag 1 to be welded.
- the mass ratio of the lower-melting plastic component (shell component 9) to the higher-melting plastic component (core component 10) may be in the embodiment according to Fig. 3a 20: 80 amount.
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Description
Die Erfindung betrifft ein schweißbares Spinnvlies, insbesondere ein schweißbares Verpackungsspinnvlies als Bestandteil von Verpackungen bzw. Verpackungssäcken, wobei das Spinnvlies Endlosfilamente aufweist, die bevorzugt aus thermoplastischem Kunststoff bestehen. Die Erfindung betrifft weiterhin ein Verfahren zur Herstellung eines schweißbaren Spinnvlieses bzw. Verpackungsspinnvlieses. - Im Rahmen der Erfindung werden Spinnvliese aus Endlosfilamenten eingesetzt. Bekanntlich unterscheiden sich Endlosfilamente aufgrund ihrer quasi endlosen Länge von Stapelfasern, die viel geringere Längen von beispielsweise 10 mm bis 60 mm aufweisen. Es liegt im Rahmen der Erfindung, dass ein erfindungsgemäßes Spinnvlies bzw. Verpackungsspinnvlies mittels eines Spunbond-Verfahrens als Spunbond-Vlies hergestellt wird.The invention relates to a weldable spunbonded nonwoven fabric, in particular a weldable spunbonded nonwoven fabric as a component of packaging or packaging sacks, wherein the spunbonded nonwoven fabric has endless filaments which preferably consist of thermoplastic material. The invention further relates to a process for the production of a weldable spunbond or packaging spunbond web. In the context of the invention, spunbonded nonwoven filaments are used. As is known, continuous filaments differ because of their quasi-endless length of staple fibers, which have much smaller lengths of, for example, 10 mm to 60 mm. It is within the scope of the invention that a spunbonded nonwoven or spunbonded nonwoven according to the invention is produced by means of a spunbond process as a spunbond nonwoven.
Schweißbare Spinnvliese bzw. Verpackungsspinnvliese für Verpackungswandungen - insbesondere von sackförmigen Verpackungen - sind aus der Praxis in unterschiedlichen Ausführungsformen bekannt. Dabei können die Spinnvliese separat als Verpackungswandungen oder als Bestandteil eines Laminates für die Verpackungswandungen eingesetzt werden. So sind zu diesem Zwecke beispielsweise Laminate von Spinnvliesen und Kunststofffolien bekannt. Verpackungswandungen aus Spinnvliesen bzw. mit Spinnvliesen sind insbesondere auch für sackförmige Verpackungen für Schüttgüter mit Füllgewichten von 25 bis 500 kg bekannt. Spinnvliese werden in diesem Zusammenhang auch für Zementsäcke eingesetzt.Weldable spunbonded nonwovens or packaging spunbonded nonwovens for packaging walls - in particular of bag-shaped packaging - are known from practice in various embodiments. The spunbonded nonwovens can be used separately as packaging walls or as part of a laminate for the packaging walls. Thus, for example, laminates of spunbonded nonwovens and plastic films are known for this purpose. Spunbonded or spunbonded nonwoven packaging walls are also known, in particular, for sack-shaped packages for bulk goods with filling weights of 25 to 500 kg. Spun nonwovens are also used for cement sacks in this context.
Die Herstellung einer sackförmigen Verpackung auf Basis eines Spinnvlieses wird zweckmäßigerweise wie folgt durchgeführt. Aus dem Spinnvlies wird zunächst ein Schlauch erzeugt (sogenannter "tube") und dabei werden gegenüberliegende Seitenenden der Vliesbahn miteinander verbunden, insbesondere miteinander verschweißt. Dann wird der Schlauch auf die gewünschte Sacklänge zugeschnitten, das dabei resultierende Produkt wird gefaltet bzw. gefalzt und daraufhin wird ein Bodenblatt als Bodenkomponente und ein Deckelblatt als Deckelkomponente aufgelegt sowie anschließend mit dem Sackkörper verschweißt.The production of a bag-shaped packaging based on a spunbonded fabric is expediently carried out as follows. From the spunbond is initially produces a tube (so-called "tube") and thereby opposite side ends of the nonwoven web are connected to each other, in particular welded together. Then the tube is cut to the desired bag length, the resulting product is folded or folded and then a bottom sheet is placed as a bottom component and a lid sheet as a lid component and then welded to the bag body.
Die bislang bekannten bzw. auf die vorstehend erläuterte Weise hergestellten sackförmigen Verpackungen lassen häufig in festigkeitsmäßiger Hinsicht zu wünschen übrig. Beim freien Fall der gefüllten Verpackungssäcke - insbesondere Zementsäcke - aus Fallhöhen von beispielsweise 2 m - reißen die Verpackungssäcke zumindest nach mehreren Abwurfversuchen auf. Das Aufreißen erfolgt in der Regel im Bereich der Schweißnähte bzw. Siegelnähte der Verpackungssäcke. Bereits insoweit sind die bekannten Verpackungssäcke - beispielsweise Zementsäcke - verbesserungsbedürftig. - Die für die Herstellung der bekannten Verpackungssäcke eingesetzten Spinnvliese lassen aber auch im Hinblick auf ihre Verarbeitbarkeit zu wünschen übrig. Das betrifft insbesondere die Schweißbarkeit bzw. Siegelbarkeit der Spinnvliese bei der Erzeugung einer Verpackung bzw. eines Verpackungssackes. Normalerweise sind dabei relativ hohe Verarbeitungstemperaturen bzw. Schweißtemperaturen erforderlich und das bedeutet zunächst einen unerwünschten hohen Energieaufwand. Fernerhin werden durch hohe Verarbeitungs- bzw. Schweißtemperaturen Bereiche des Vliesmaterials beschädigt und bereits daraus resultieren Festigkeitseinbußen. Im Übrigen lässt die Festigkeit bzw. Haltbarkeit der Schweißnähte zu wünschen übrig. Weiterhin ist für die aus den Spinnvliesen hergestellten bekannten Verpackungssäcke normalerweise zwingend eine Beschichtung mit Zusatzmaterial erforderlich, so dass auch der Rohstoffaufwand bzw. -verbrauch unerwünscht hoch ist. Im Ergebnis besteht Verbesserungsbedarf.The previously known or prepared in the manner described above sack-shaped packaging can often be in terms of strength to be desired. In free fall of the filled packaging bags - especially cement bags - from drop heights of, for example, 2 m - tear the packaging bags on at least after several Abwurfversuchen on. The tearing open usually takes place in the area of the weld seams or sealing seams of the packaging bags. Even so far, the known packaging bags - for example, cement bags - in need of improvement. - However, the spunbonded fabrics used for the production of the known packaging bags leave something to be desired in terms of their processability. This relates in particular to the weldability or sealability of the spunbonded nonwovens in the production of a packaging or a packaging sack. Normally, relatively high processing temperatures or welding temperatures are required and this initially means an undesirable high energy consumption. Furthermore, areas of the nonwoven material are damaged by high processing or welding temperatures and already result in loss of strength. Incidentally, the strength or durability of the welds leaves something to be desired. Furthermore, a coating with additional material is normally mandatory for the known packaging bags produced from spunbonded nonwovens, so that the raw material costs or consumption is undesirably high. As a result, there is room for improvement.
Aus
Der Erfindung liegt das technische Problem zugrunde, ein schweißbares Spinnvlies bzw. Verpackungsspinnvlies anzugeben, das einerseits auf relativ einfache und wenig aufwändige Weise verarbeitbar bzw. schweißbar ist und andererseits auch im verarbeiteten Zustand in festigkeitsmäßiger bzw. stabilitätsmäßiger Hinsicht allen Anforderungen genügt. Der Erfindung liegt weiterhin das technische Problem zugrunde, ein Verfahren zur Herstellung eines solchen schweißbaren Spinnvlieses bzw. Verpackungsspinnvlieses anzugeben.
Zur Lösung des technischen Problems lehrt die Erfindung ein schweißbares Spinnvlies, insbesondere ein schweißbares Verpackungsspinnvlies als Bestandteil von Verpackungen bzw. Verpackungssäcken, wobei das Spinnvlies Endlosfilamente aus thermoplastischem Kunststoff aufweist, wobei die Endlosfilamente als Multikomponentenfilamente, insbesondere als Bikomponentenfilamente ausgebildet sind, wobei zumindest eine Komponente dieser Endlosfilamente mindestens 3 Gew.-%, vorzugsweise mindestens 4 Gew.-% zumindest eines Füllstoffes zur Verbesserung der Schweißbarkeit des Spinnvlieses - insbesondere zur Herabsetzung der Schweißtemperatur beim thermischen Verschweißen des Spinnvlieses - aufweist, wobei eine an der Oberfläche der Multikomponentenfilamente bzw. Bikomponentenfilamente angeordnete erste Kunststoffkomponente
- entweder einen geringeren Schmelzpunkt aufweist als eine zweite Kunststoffkomponente der Filamente und wobei der Füllstoff zumindest in der ersten niedriger schmelzenden Kunststoffkomponente enthalten ist
- oder einen gleichen Schmelzpunkt aufweist wie eine zweite Kunststoffkomponente der Filamente und wobei der Füllstoff lediglich in der ersten gleich schmelzenden Kunststoffkomponente enthalten ist.
To solve the technical problem, the invention teaches a weldable spunbonded nonwoven fabric, in particular a weldable spunbonded nonwoven as a component of packaging or packaging sacks, wherein the spunbonded nonwoven filaments of thermoplastic material, wherein the filaments are formed as Multikomponentenfilamente, in particular as bicomponent filaments, wherein at least one component of this Endlosfilamente at least 3 wt .-%, preferably at least 4 wt .-% of at least one filler to improve the weldability of the spunbonded fabric - in particular to reduce the welding temperature during thermal welding of the spunbonded nonwoven fabric, wherein a first plastic component arranged on the surface of the multicomponent filaments or bicomponent filaments
- either a lower melting point than a second plastic component of the filaments and wherein the filler is contained at least in the first lower melting plastic component
- or a same melting point as a second plastic component of the filaments and wherein the filler is contained only in the first equal melting plastic component.
Gemäß einer besonders bevorzugten Ausführungsform der Erfindung weisen die Endlosfilamente bzw. zumindest eine Komponente der Endlosfilamente des schweißbaren Spinnvlieses, insbesondere des schweißbaren Verpackungsspinnvlieses 4 bis 25 Gew.-% des Füllstoffes, bevorzugt 5 bis 20 Gew.-% und sehr bevorzugt 6 bis 15 Gew.-% des Füllstoffes auf. Die einzelnen Anteile der Bestandteile der Endlosfilamente - insbesondere der Kunststoffkomponente bzw. der Kunststoffkomponenten der Endlosfilamente - addieren sich dabei mit dem Anteil des Füllstoffes zu insgesamt 100 Gew.-%.According to a particularly preferred embodiment of the invention, the continuous filaments or at least one component of the continuous filaments of the weldable spunbonded nonwoven fabric, in particular the weldable packaging spunbonded nonwoven 4 to 25 wt .-% of the filler, preferably 5 to 20 wt .-% and very preferably 6 to 15 wt .-% of the filler. The individual proportions of the constituents of the endless filaments - in particular the plastic component or the plastic components of the continuous filaments - add up to a total of 100 wt .-% with the proportion of the filler.
Es liegt im Rahmen der Erfindung, dass es sich bei dem Füllstoff um zumindest ein Metallsalz und vorzugsweise um zumindest ein Erdalkalimetallsalz handelt. Eine besonders empfohlene Ausführungsform der Erfindung zeichnet sich dadurch aus, dass der Füllstoff ein Calciumsalz ist und ganz besonders bevorzugt ist der Füllstoff Calciumcarbonat. Calciumcarbonat hat sich hier als Füllstoff für das erfindungsgemäße schweißbare Spinnvlies zur Lösung des technischen Problems besonders bewährt. Grundsätzlich kann auch Calciumsulfat als Füllstoff eingesetzt werden.It is within the scope of the invention that the filler is at least one metal salt and preferably at least one alkaline earth metal salt. A particularly recommended embodiment of the invention is characterized in that the filler is a calcium salt and most preferably the filler is calcium carbonate. Calcium carbonate has proved to be particularly useful as a filler for the weldable spunbonded fabric according to the invention for solving the technical problem. Basically, calcium sulfate can also be used as a filler.
Erfindungsgemäß sind die Endlosfilamente des schweißbaren Spinnvlieses als Multikomponentenfilamente, insbesondere als Bikomponentenfilamente ausgebildet. Weiterhin ist der Füllstoff in einer an der Außenoberfläche der Multikomponentenfilamente bzw. Bikomponentenfilamente angeordneten Kunststoffkomponente enthalten. Eine an der Oberfläche der Multikomponentenfilamente bzw. der Bikomponentenfilamente angeordnete erste Kunststoffkomponente weist einen gleichen, bevorzugt einen geringeren Schmelzpunkt, auf als zumindest eine zweite Kunststoffkomponente der Multikomponentenfilamente bzw. Bikomponentenfilamente. Der Füllstoff ist zumindest in der niedriger schmelzenden Kunststoffkomponente enthalten oder lediglich in der ersten gleich schmelzenden Kunststoffkomponente enthalten.According to the invention, the continuous filaments of the weldable spunbonded nonwoven fabric are formed as multicomponent filaments, in particular as bicomponent filaments. Furthermore, the filler is contained in a plastic component arranged on the outer surface of the multicomponent filaments or bicomponent filaments. A first plastic component arranged on the surface of the multicomponent filaments or the bicomponent filaments has the same, preferably a lower melting point, than at least one second plastic component of the multicomponent filaments or bicomponent filaments. The filler is contained at least in the lower melting plastic component or contained only in the first equal melting plastic component.
Nach bevorzugter Ausführungsform der Erfindung weisen die Multikomponentenfilamente bzw. die Bikomponentenfilamente des schweißbaren Spinnvlieses eine Kern-Mantel-Konfiguration auf. Zweckmäßigerweise ist der Füllstoff in der Mantelkomponente dieser Multikomponentenfilamente bzw. Bikomponentenfilamente enthalten. Gemäß sehr empfohlener Ausführungsform der Erfindung ist die gleich oder niedriger schmelzende Kunststoffkomponente der Multikomponentenfilamente bzw. Bikomponentenfilamente des schweißbaren Spinnvlieses die Mantelkomponente und der Füllstoff ist dann zumindest in dieser Mantelkomponente enthalten oder im Wesentlichen oder lediglich in der Mantelkomponente enthalten.According to a preferred embodiment of the invention, the multicomponent filaments or the bicomponent filaments of the weldable spunbonded web have a core-sheath configuration. The filler is expediently contained in the sheath component of these multicomponent filaments or bicomponent filaments. According to a highly recommended embodiment of the invention, the equal or lower melting plastic component of the multicomponent filaments or bicomponent filaments of the weldable spunbonded nonwoven fabric is the sheath component and the filler is then contained at least in this sheath component or substantially or merely contained in the sheath component.
Als Kunststoffkomponente bzw. als Kunststoffkomponenten für die Endlosfilamente der erfindungsgemäßen Spinnvliese werden bevorzugt Polyolefine oder andere thermoplastische Kunststoffe eingesetzt. Es liegt dabei auch im Rahmen der Erfindung, dass Blends der genannten Kunststoffe als Kunststoffkomponente bzw. als Kunststoffkomponenten verwendet werden.
- Gemäß einer Ausführungsform der Erfindung ist das schweißbare Spinnvlies als Spinnvlies aus Bikomponentenfilamenten ausgebildet und zwar aus Bikomponentenfilamenten mit Kern-Mantel-Konfiguration. Die gleich oder niedriger schmelzende Komponente befindet sich im Mantel und besteht beispielsweise aus einem Polypropylencopolymer bzw. im Wesentlichen aus einem Polypropylencopolymer. Dabei ist zu berücksichtigen, dass es im Rahmen der Erfindung liegt, dass in der Mantelkomponente zusätzlich der Füllstoff - bevorzugt in den oben spezifizierten Anteilen - enthalten ist. Die höher oder gleich schmelzende Komponente ist im Kern der Bikomponentenfilamente angeordnet und besteht zum Beispiel aus Polypropylen bzw. im Wesentlichen aus Polypropylen. Nach einer weiteren Ausführungsvariante kann als niedriger schmelzende Komponente bzw. als Mantelkomponente der Bikomponentenfilamente bzw. Multikomponentenfilamente ein Polyethylen eingesetzt werden und als höher schmelzende Komponente bzw. als Kernkomponente ein Polypropylen eingesetzt werden.
- Gemäß einer empfohlenen Ausführungsform besteht zumindest eine Kunststoffkomponente der Bikomponentenfilamente bzw. der Multikomponentenfilamente des erfindungsgemäßen Spinnvlieses aus einem Polyolefin bzw. im Wesentlichen aus einem Polyolefin. Eine bewährte Ausführungsform ist dadurch gekennzeichnet, dass beide oder alle Kunststoffkomponenten der Bikomponentenfilamente bzw. der Multikomponentenfilamente des erfindungsgemäßen schweißbaren Spinnvlieses aus Polyolefinen bzw. im Wesentlichen aus Polyolefinen bestehen. Grundsätzlich ist aber auch der Einsatz anderer thermoplastischer Kunststoffe oder ihrer Blends für die Komponenten möglich.
- According to one embodiment of the invention, the weldable spunbonded nonwoven web is formed as spunbonded bicomponent filaments of bicomponent filaments having a core-shell configuration. The equal or lower melting component is in the shell and consists for example of a polypropylene copolymer or substantially of a polypropylene copolymer. It should be noted that it is within the scope of the invention that in the shell component additionally the filler - preferably in the above specified proportions - is included. The higher or equal melting component is arranged in the core of the bicomponent filaments and consists for example of polypropylene or substantially of polypropylene. According to a further embodiment variant, a polyethylene can be used as the lower-melting component or as the sheath component of the bicomponent filaments or multicomponent filaments, and a polypropylene can be used as the higher-melting component or as the core component.
- According to a recommended embodiment, at least one plastic component of the bicomponent filaments or of the multicomponent filaments of the spunbonded nonwoven according to the invention consists of a polyolefin or essentially of a polyolefin. A proven embodiment is characterized in that both or all plastic components of the bicomponent filaments or the multicomponent filaments of the weldable spunbonded web according to the invention consist of polyolefins or substantially of polyolefins. In principle, however, the use of other thermoplastics or their blends for the components is possible.
Es wurde bereits dargelegt, dass der Füllstoff in einer Kunststoffkomponente der Bikomponentenfilamente bzw. Multikomponentenfilamente angeordnet ist, die sich an der Oberfläche der Filamente befindet. Vorzugsweise handelt es sich dabei um die niedriger schmelzende Kunststoffkomponente im Filament und sehr bevorzugt ist die niedriger schmelzende Komponente die Mantelkomponente einer Kern-Mantel-Konfiguration der Bikomponentenfilamente bzw. Multikomponentenfilamente. Empfohlenermaßen sind 5 bis 25 Gew.-%, bevorzugt 7,5 bis 22,5 Gew.-% und sehr bevorzugt 10 bis 20 Gew.-% des Füllstoffes - insbesondere des Calciumcarbonates - in der an der Oberfläche der Filamente angeordneten - vorzugsweise niedriger schmelzenden - Kunststoffkomponente enthalten, vorzugsweise in der niedriger schmelzenden Kunststoffkomponente im Mantel der Bikomponentenfilamente bzw. Multikomponentenfilamente enthalten. Zweckmäßigerweise ist der Füllstoff bzw. ist das Calciumcarbonat dabei homogen bzw. im Wesentlichen homogen in der Kunststoffkomponente verteilt oder an der Außenoberfläche bzw. im Wesentlichen an der Außenoberfläche der Kunststoffkomponente angeordnet.It has already been stated that the filler is arranged in a plastic component of the bicomponent filaments or multi-component filaments which is located on the surface of the filaments. Preferably, this is the lower melting plastic component in the filament and most preferably, the lower melting component is the sheath component of a core-sheath configuration of the bicomponent filaments. It is recommended that 5 to 25 wt .-%, preferably 7.5 to 22.5 wt .-% and very preferably 10 to 20 wt .-% of the filler - especially the calcium carbonate - arranged in the arranged on the surface of the filaments - preferably lower melting plastic component, preferably contained in the lower melting plastic component in the jacket of the bicomponent filaments or multicomponent filaments. The filler or the calcium carbonate is expediently distributed homogeneously or essentially homogeneously in the plastic component or arranged on the outer surface or essentially on the outer surface of the plastic component.
Es liegt im Rahmen der Erfindung, dass in den Bikomponentenfilamenten bzw. Multikomponentenfilamenten eines erfindungsgemäßen Spinnvlieses das Massenverhältnis der ersten - vorzugsweise niedriger schmelzenden - Kunststoffkomponente - insbesondere der Mantelkomponente - zur zweiten - vorzugsweise höher schmelzenden - Kunststoffkomponente - insbesondere der Kernkomponente - 10:90 bis 35:65, zweckmäßigerweise 15:85 bis 35 : 65, vorzugsweise 20 : 80 bis 50 : 50 und bevorzugt 25 : 75 bis 45 : 55 beträgt. In Spinnvliesen bzw. in Verpackungswandungsbereichen mit einem erfindungsgemäßen Spinnvlies, in bzw. an denen eine Verschweißung bzw. Versiegelung nicht stattfindet, beläuft sich gemäß einer bewährten Ausführungsform das Massenverhältnis der ersten - vorzugsweise niedriger schmelzenden - Kunststoffkomponente - insbesondere der Mantelkomponente - zur zweiten - vorzugsweise höher schmelzenden - Komponente - insbesondere zur Kernkomponente - auf 20 : 80 bis 30 : 70, bevorzugt auf 20:80 bis 25:75. Dagegen beträgt in Spinnvliesen bzw. in Verpackungswandungsbereichen, in bzw. an denen eine Verschweißung bzw. Versiegelung stattfindet das Massenverhältnis der ersten - vorzugsweise niedriger schmelzenden - Kunststoffkomponente - insbesondere der Mantelkomponente - zur zweiten, vorzugsweise höher schmelzenden Komponente - insbesondere zur Kernkomponente - 35 : 65 bis 50 :50, bevorzugt 40 : 60 bis 45 : 55. Es liegt im Rahmen der Erfindung, dass bei Multikomponentenfilamenten bzw. Bikomponentenfilamenten von für eine Verschweißung vorgesehenen Spinnvliesen bzw. Spinnvliesbereichen der Anteil der Mantelkomponente im Verhältnis zur Kernkomponente höher ist als bei Multikomponentenfilamenten bzw. Bikomponentenfilamenten von Spinnvliesen bzw. Spinnvliesbereichen, die nicht für eine Verschweißung vorgesehen sind.It is within the scope of the invention that in the bicomponent filaments or multicomponent filaments of a spunbonded nonwoven according to the invention the mass ratio of the first - preferably lower melting - plastic component - especially the shell component - to the second - preferably higher melting - plastic component - in particular the core component - 10:90 to 35 : 65, suitably 15:85 to 35:65, preferably 20:80 to 50:50, and preferably 25:75 to 45:55. In spunbonded nonwovens or in packaging wall regions with a spunbonded nonwoven according to the invention in which a welding or sealing does not take place, the mass ratio of the first - preferably lower melting - plastic component - in particular of the shell component - to the second - preferably higher melting component - in particular to the core component - to 20: 80 to 30: 70, preferably to 20:80 to 25:75. In contrast, in spunbonds or in Verpackungswandungsbereichen, in or at which a welding or sealing takes place the mass ratio of the first - preferably lower melting - plastic component - in particular the sheath component - the second, preferably higher melting component - in particular the core component - 35: 65 to 50: 50, preferably 40 It is within the scope of the invention that the proportion of the sheath component in relation to the core component is higher in the case of multicomponent filaments or bicomponent filaments of spunbonded webs or spunbonded areas intended for welding than in the case of multicomponent filaments or bicomponent filaments of spunbonded webs or spunbonded web areas that are not intended for welding.
Eine besonders bevorzugte Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass das schweißbare Spinnvlies ein kalandriertes Spinnvlies ist. Empfohlenermaßen ist eine Oberfläche dieses Spinnvlieses glatt kalandriert und eine Oberfläche profiliert kalandriert. Es können aber auch beide Oberflächen des Spinnvlieses glatt kalandriert sein. - Es liegt im Rahmen der Erfindung, dass das Verhältnis der Festigkeit bzw. Zugfestigkeit des schweißbaren Spinnvlieses in Maschinenrichtung (MD) zur Festigkeit bzw. Zugfestigkeit des Spinnvlieses quer zur Maschinenrichtung (CD) entweder gleich 1 oder größer als 1 ist, vorzugsweise größer als 1,1 und besonders bevorzugt größer als 1,2 ist. Maschinenrichtung meint dabei insbesondere die Förderrichtung des abgelegten Spinnvlieses auf einer Ablage bzw. auf einer Ablageeinrichtung.A particularly preferred embodiment of the invention is characterized in that the weldable spunbonded fabric is a calendered spunbonded nonwoven. Empfohlenermaßen a surface of this spunbond is calendered smooth and a surface profiled calendered. But it can also be calendered smoothly both surfaces of the spunbonded fabric. It is within the scope of the invention that the ratio of the strength or tensile strength of the weldable spunbonded fabric in the machine direction (MD) to the strength or tensile strength of the spunbonded material transversely to the machine direction (CD) is either equal to 1 or greater than 1, preferably greater than 1 , 1 and more preferably greater than 1.2. Machine direction means in particular the conveying direction of the deposited spunbonded on a shelf or on a storage device.
Es liegt weiterhin im Rahmen der Erfindung, dass ein erfindungsgemäßes schweißbares Spinnvlies nach dem folgenden Verfahren hergestellt wird: Zunächst werden Endlosfilamente mittels einer Spinnerette ersponnen und anschließend werden diese Filamente in einer Kühleinrichtung gekühlt sowie im Anschluss daran mittels einer Verstreckvorrichtung verstreckt und daraufhin auf einer Ablageeinrichtung zum Spinnvlies abgelegt. Insoweit liegt es im Rahmen der Erfindung, dass das erfindungsgemäße schweißbare Spinnvlies bzw. schweißbare Verpackungsspinnvlies als Spunbond-Vlies nach einem Spunbond-Verfahren hergestellt wird. Gemäß besonders bevorzugter Ausführungsform der Erfindung ist die Kühleinrichtung in zumindest zwei übereinander bzw. in Filamentströmungsrichtung hintereinander angeordnete Kabinenabschnitte unterteilt, wobei aus diesen Kabinenabschnitten Kühlluft mit unterschiedlichem konvektiven Wärmeabfuhrvermögen - insbesondere Kühlluft mit unterschiedlicher Temperatur - in den Filamentströmungsraum eingeführt wird. Empfohlenermaßen weist die Kühleinrichtung lediglich zwei solcher übereinander bzw. in Filamentströmungsrichtung hintereinander angeordneter Kabinenabschnitte auf. Vorzugsweise ist die Kühleinrichtung über einen Zwischenkanal - insbesondere über einen in Filamentströmungsrichtung konvergierenden Zwischenkanal - mit einem Unterziehkanal der Verstreckvorrichtung verbunden. Die Endlosfilamente werden also durch die Kühleinrichtung, dann durch den Zwischenkanal und anschließend durch den Unterziehkanal geführt. Schließlich werden die Filamente zur Spinnvliesbahn bzw. zum Spinnvlies auf einer Ablageeinrichtung abgelegt, die vorzugsweise als Ablagesiebband bzw. als endlos umlaufendes Ablagesiebband ausgebildet ist.It is further within the scope of the invention that a weldable spunbonded fabric according to the invention is produced by the following method: First, continuous filaments are spun by means of a spinnerette and Subsequently, these filaments are cooled in a cooling device and then stretched by means of a drawing device and then deposited on a storage device for spunbonded. In that regard, it is within the scope of the invention that the weldable spunbonded or weldable spunbonded nonwoven fabric according to the invention is produced as a spunbond nonwoven by a spunbond process. According to a particularly preferred embodiment of the invention, the cooling device is subdivided into at least two cabin sections arranged one above the other or in the direction of filament flow, wherein cooling air with different convective heat removal capacities - in particular cooling air with different temperatures - is introduced into the filament flow space from these cabin sections. Empfohlenermaßen, the cooling device has only two such one above the other or in Filamentströmungsrichtung successively arranged cabin sections. Preferably, the cooling device is connected via an intermediate channel - in particular via an intermediate channel converging in the direction of filament flow - to a draw channel of the drawing device. The endless filaments are thus guided through the cooling device, then through the intermediate channel and then through the lower channel. Finally, the filaments are deposited to the spunbonded web or spunbonded on a storage device, which is preferably designed as Ablagesiebband or endlessly circulating Ablagesiebband.
Eine ganz besonders empfohlene Ausführungsform des Verfahrens bzw. der Vorrichtung zur Herstellung eines erfindungsgemäßen schweißbaren Spinnvlieses ist dadurch gekennzeichnet, dass das Aggregat aus Kühleinrichtung, Zwischenkanal und daran angeschlossenem Unterziehkanal als geschlossenes Aggregat ausgebildet ist und dass außer der Zufuhr der Kühlluft in der Kühleinrichtung keine weitere Luftzufuhr in dieses geschlossene Aggregat erfolgt. Weiterhin ist im Rahmen der erfindungsgemäßen Herstellung des schweißbaren Spinnvlieses bevorzugt, dass zwischen dem Unterziehkanal und der Ablageeinrichtung zumindest ein Diffusor angeordnet ist, durch den die Filamente in Filamentströmungsrichtung zur Ablageeinrichtung hin geführt werden. Zweckmäßigerweise sind zumindest zwei Diffusoren, bevorzugt zwei Diffusoren in Filamentströmungsrichtung hintereinander zwischen dem Unterziehkanal und der Ablageeinrichtung angeordnet. Fernerhin zeichnet sich eine empfohlene Ausführungsform der Erfindung dadurch aus, dass die Filamente im Bereich der Spinnerette bzw. zwischen der Spinnerette und der Kühleinrichtung durch eine Monomerabsaugungsvorrichtung geführt werden. In dieser Monomerabsaugungsvorrichtung werden die neben den Filamenten austretenden Gase in Form von Monomeren, Oligomeren, Zersetzungsprodukten und dergleichen aus dem Filamentbildungsraum unterhalb der Spinnerette bzw. aus der Vorrichtung entfernt.A particularly recommended embodiment of the method and the device for producing a weldable spunbonded fabric according to the invention is characterized in that the aggregate of cooling device, intermediate channel and connected thereto Unterziehkanal is designed as a closed unit and that except the supply of cooling air in the cooling device no further air supply takes place in this closed unit. Furthermore, in the context of the production of the invention weldable spunbonded preferably that between the underrun channel and the storage device at least one diffuser is arranged, through which the filaments are guided in Filamentströmungsrichtung to the storage device out. Expediently, at least two diffusers, preferably two diffusers in the filament flow direction, are arranged one behind the other between the lower draw channel and the storage device. Furthermore, a recommended embodiment of the invention is characterized in that the filaments are guided in the region of the spinnerette or between the spinnerette and the cooling device by a Monosabsaugungsvorrichtung. In this monomer extraction apparatus, the gases exiting the filaments in the form of monomers, oligomers, decomposition products and the like are removed from the filament forming space below the spinnerette or apparatus.
Es liegt im Rahmen der Erfindung, dass das aus den Endlosfilamenten abgelegte Spinnvlies mit zumindest einem Kalander vorverfestigt bzw. verfestigt wird. Die Kalandrierung kann dabei inline oder offline erfolgen. Empfohlenermaßen weist ein Kalander für eine solche Kalandrierung eine Prägefläche von 10 bis 90 % und bevorzugt von 15 bis 35 % sowie sehr bevorzugt von 18 bis 30 % auf. Gemäß einer bevorzugten Ausführungsform weist dabei lediglich eine von zwei Kalanderwalzen eine Gravur und bevorzugt die oben spezifizierte Prägefläche auf und die gegenüberliegende bzw. zugeordnete Kalanderwalze ist glatt bzw. im Wesentlichen glatt und ohne Gravur ausgebildet. Vorzugsweise beträgt die Prägetiefe der Kalandergravur 0,1 bis 0,8 mm, bevorzugt 0,1 bis 0,6 mm und sehr bevorzugt 0,2 bis 0,4 mm. Es empfiehlt sich, dass die Anzahl der Gravurpunkte einer Kalanderwalze bzw. der Kalanderwalze mit Gravur größer als 30/cm2 und bevorzugt größer als 40 /cm2 ist. Besonders bevorzugt beträgt die Anzahl der Gravurpunkte einer Kalanderwalze bzw. der Kalanderwalze mit Gravur mehr als 45/cm2. Gemäß einer bewährten Ausführungsform haben die Gravurpunkte einer Kalanderwalze bzw. der Kalanderwalze mit Gravur in der Draufsicht Rautenform. Nach einer weiteren Ausführungsform wird das erfindungsgemäße Spinnvlies mit einem Kalander aus zwei Kalanderwalzen mit glatter Oberfläche kalandriert.It is within the scope of the invention that the spun-bonded non-woven fabric deposited from the endless filaments is preconsolidated or solidified with at least one calender. The calendering can take place inline or offline. It is recommended that a calender for such calendering have an embossing area of from 10 to 90%, and preferably from 15 to 35%, and more preferably from 18 to 30%. According to a preferred embodiment, only one of two calender rolls has an engraving and preferably the stamping surface specified above, and the opposite or associated calender roll is smooth or substantially smooth and without engraving. The embossing depth of the calender engraving is preferably 0.1 to 0.8 mm, preferably 0.1 to 0.6 mm and very preferably 0.2 to 0.4 mm. It is recommended that the number of engraved points of a calender roll or the calender roll with engraving is greater than 30 / cm 2 and preferably greater than 40 / cm 2 . Particularly preferably, the number of engraved points of a calender roll or calender roll with engraving is more than 45 / cm 2 . According to In a proven embodiment, the engraving points of a calender roll or the calender roll engraved in plan view diamond shape. According to a further embodiment, the spunbonded nonwoven according to the invention is calendered with a calender of two calender rolls with a smooth surface.
Gemäß einer weiteren Ausführungsform der Erfindung kann die Kalandrierung eines erfindungsgemäßen Spinnvlieses auch mit einem Bandkalander stattfinden. - Eine Ausführungsvariante ist dadurch gekennzeichnet, dass die Kalandrierung zumindest zweistufig bzw. zweistufig durchgeführt wird. Dabei wird das abgelegte Spinnvlies zunächst mit einem Kalander bzw. mit einem Standard-Kalander kalandriert, der eine Gravur, vorzugsweise die oben erläuterte Gravur aufweist. In einem zweiten Schritt wird das Spinnvlies dann mit einem Kalander aus zwei Kalanderwalzen mit glatter Oberfläche kalandriert oder mit einem Bandkalander kalandriert. Bei dem Kalander aus zwei Kalanderwalzen mit glatter Oberfläche kann eine Oberfläche kunststoffbeschichtet sein und eine Oberfläche aus Stahl bzw. im Wesentlichen aus Stahl bestehen.According to a further embodiment of the invention, the calendering of a spunbonded nonwoven according to the invention can also take place with a belt calender. - A variant is characterized in that the calendering is performed at least two stages or two stages. The deposited spunbonded fabric is first calendered with a calender or with a standard calender, which has an engraving, preferably the engraving explained above. In a second step, the spunbonded fabric is then calendered with a calender of two calender rolls with a smooth surface or calendered with a belt calender. In the calender of two calender rolls with a smooth surface, a surface may be plastic coated and a surface of steel or substantially consist of steel.
Die vorstehend erläuterte Kalandrierung des Spinnvlieses hat sich im Hinblick auf die Lösung des erfindungsgemäßen technischen Problems besonders bewährt. Auf die beschriebene Weise kalandrierte bzw. vorverfestigte/verfestigte Spinnvliese lassen sich besonders vorteilhaft verschweißen bzw. zu Verpackungen verschweißen. - Die erfindungsgemäß erzeugten Spinnvliese können im Zuge der Herstellung von Verpackungen problemlos und einfach mit weiteren Lagen, insbesondere mit Kunststofffolien und/oder Meltblown-Vliesen oder weiteren Spunbond-Vliesen kombiniert oder beschichtet werden.The above-explained calendering of the spunbonded fabric has proven particularly suitable with regard to the solution of the technical problem according to the invention. In the manner described calendered or preconsolidated / solidified spunbonded nonwovens can be particularly advantageous welded or welded into packages. - The spunbonded nonwovens produced according to the invention can be easily and simply combined or coated in the course of the production of packaging with other layers, in particular with plastic films and / or meltblown webs or other spunbond nonwovens.
Die Herstellung eines erfindungsgemäßen schweißbaren Spinnvlieses bzw. schweißbaren Verpackungsspinnvlieses nach einem vorstehend erläuterten Spunbond-Verfahren hat sich im Rahmen der Erfindung besonders bewährt. Auf diese Weise können Spinnvliese mit optimierter Ablagequalität erhalten werden und dabei können sehr homogene Spinnvliese erzeugt werden. Vor allem kann bei diesem bevorzugten Verfahren die Spinnvliesablage insoweit optimiert werden, dass Dünnstellen und Dickstellen im Spinnvlies im Vergleich zu anderen bekannten Verfahren erheblich reduziert sind. Bei Analyse einer Mehrzahl von definierten Spinnvlies-Flächenabschnitten - beispielsweise bei Untersuchung einer Mehrzahl von Spinnvlies-Quadraten von 2 x 2 cm2 - kann bei den mit dem erfindungsgemäßen Spunbond-Verfahren hergestellten Spinnvliesen die Spannweite zwischen der leichtesten Dünnstelle bzw. dem leichtesten analysierten Quadrat und der schwersten Dickstelle bzw. dem schwersten analysierten Quadrat im Vergleich zu anderen bekannten Herstellungsverfahren deutlich reduziert werden. So kann dabei die Spannweite beispielsweise von über 30 g/m2 bei anderen bekannten Verfahren auf etwa 15 g/m2 bei dem erfindungsgemäß eingesetzten Verfahren abgesenkt werden.The production of a weldable spunbonded nonwoven fabric or weldable spunbonded nonwoven fabric according to a spunbond process explained above has proven particularly useful in the context of the invention. In this way, spunbonded nonwovens with optimized filing quality can be obtained, and very homogeneous spunbonded nonwovens can be produced. Above all, in this preferred method, the spunbond storage can be optimized insofar as thin areas and thick areas in the spunbonded fabric are considerably reduced in comparison to other known methods. When analyzing a plurality of defined spunbond surface sections - for example, when examining a plurality of spunbond squares of 2 x 2 cm 2 - in the spunbonded nonwoven spunbonded according to the invention, the span between the lightest thin spot and the lightest analyzed square and The heaviest thick spot or the heaviest analyzed square are significantly reduced compared to other known manufacturing processes. Thus, the span can be lowered, for example, from about 30 g / m 2 in other known methods to about 15 g / m 2 in the method used in the invention.
Der Erfindung liegt insoweit die Erkenntnis zugrunde, dass die wie vorstehend beschrieben hergestellten Spunbond-Vliese sich hervorragend zu Verpackungen - beispielsweise zu Verpackungssäcken - verarbeiten lassen und insbesondere einfach und problemlos verschweißen lassen. In diesem Zusammenhang liegt der Erfindung weiterhin die Erkenntnis zugrunde, dass die Schweißtemperatur zur Verschweißung dieser erfindungsgemäßen Spinnvliese bzw. Verpackungsspinnvliese im Vergleich zu den nach anderen bekannten Verfahren hergestellten Spinnvliesen deutlich abgesenkt werden kann. Diese vorteilhafte Absenkung der Schweißtemperatur ergibt sich vor allem auch in Kombination mit dem erfindungsgemäßen Füllstoff, insbesondere in Form von Calciumcarbonat. Die nach dem bevorzugt eingesetzten Verfahren erzeugten schweißbaren Spinnvliese weisen in vorteilhafter Weise weniger Dünnstellen auf als andere Spinnvliese und demzufolge können auch kaum Dünnstellen beim Schweißen geschädigt werden. Im Ergebnis zeichnen sich deshalb die erfindungsgemäß hergestellten Spinnvliese durch eine optimale Verarbeitbarkeit, insbesondere Verschweißbarkeit aus und sie haben insoweit optimale Grundvoraussetzungen zur Herstellung von Verpackungen.Insofar, the invention is based on the finding that the spunbond nonwovens prepared as described above can be excellently processed into packaging, for example into packaging sacks, and in particular can be welded simply and easily. In this context, the invention is further based on the finding that the welding temperature for welding these spunbonded nonwovens or packaging spunbonded nonwovens according to the invention can be markedly reduced in comparison with the spunbonded nonwoven webs produced by other known processes. This advantageous lowering of the welding temperature results especially in combination with the filler according to the invention, in particular in the form of calcium carbonate. The produced according to the preferred method used Weldable spunbonded webs advantageously have fewer thin spots than other spunbonded webs, and consequently hardly any thin spots during welding can be damaged. As a result, therefore, the spunbonded nonwovens produced according to the invention are distinguished by optimum processability, in particular weldability, and to that extent they have optimum basic prerequisites for the production of packaging.
Besonders vorteilhafte Eigenschaften für die Herstellung von Verpackungen haben Spunbond-Vliese, bei denen das Verhältnis der Festigkeit bzw. Zugfestigkeit des Spinnvlieses in Maschinenrichtung (MD) zur Festigkeit bzw. Zugfestigkeit des Spinnvlieses quer zur Maschinenrichtung (CD) gleich 1 oder größer als 1 ist, vorzugsweise größer als 1,1 ist, bevorzugt größer als 1,2 ist und sehr bevorzugt größer 1,25 ist. - Die erläuterten bevorzugten Merkmale des erfindungsgemäßen Spinnvlieses bzw. des Verfahrens zur Herstellung des Spinnvlieses sowie die dadurch erreichten Vorteile kombinieren sich in optimaler Weise mit dem erfindungsgemäßen Füllstoff bzw. mit dem erfindungsgemäßen Füllstoffgehalt und den dadurch erreichten Vorteilen.Spunbond nonwovens in which the ratio of the strength or tensile strength of the spunbond MD in the machine direction (MD) to the strength or tensile strength of the spunbond cross-machine direction (CD) is equal to 1 or greater than 1 have particularly advantageous properties for the production of packaging. is preferably greater than 1.1, preferably greater than 1.2, and more preferably greater than 1.25. - The explained preferred features of the spunbonded nonwoven fabric according to the invention and the method for producing the spunbonded nonwoven and the advantages achieved thereby combine optimally with the filler according to the invention or with the filler content according to the invention and the advantages achieved thereby.
Ein erfindungsgemäßes Spinnvlies kann weiterhin für eine Verpackung, insbesondere für einen Verpackungssack - beispielsweise einen Zementsack - vorzugsweise zur Aufnahme von schüttfähigen und/oder rieselfähigen Produkten wie Zement und dergleichen, eingesetzt werden. Dabei weist die Verpackung zumindest ein Spinnvlies bzw. Verpackungsspinnvlies auf, wobei das Spinnvlies bzw. Verpackungspinnvlies Endlosfilamente aus thermoplastischem Kunststoff aufweist,
- wobei entweder die Endlosfilamente Monokomponentenfilamente sind und
mindestens 3 Gew.-%,vorzugsweise mindestens 4 Gew.-% zumindest eines Füllstoffes zur Verbesserung der Schweißbarkeit des Spinnvlieses - insbesondere zur Herabsetzung der Schweißtemperatur beim thermischen Verschweißen des Spinnvlieses - aufweisen - oder wobei die Endlosfilamente als Multikomponentenfilamente, insbesondere als Bikomponentenfilamente, ausgebildet sind und wobei eine an der Oberfläche der Multikomponentenfilamente bzw. Bikomponentenfilamente
angeordnete Kunststoffkomponente mindestens 3 Gew.-%,vorzugsweise mindestens 4 Gew.-% zumindest eines Füllstoffes zur Verbesserung der Schweißbarkeit des Spinnvlies - insbesondere zur Herabsetzung der Schweißtemperatur beim thermischen Verschweißen des Spinnvlieses - aufweist
- wherein either the continuous filaments are monocomponent filaments and at least 3 wt .-%, preferably at least 4 wt .-% of at least one filler to improve the weldability of Spunbonded nonwoven fabric - in particular for reducing the welding temperature during thermal welding of the spunbonded nonwoven fabric
- or wherein the endless filaments are formed as multicomponent filaments, in particular as bicomponent filaments, and wherein a plastic component arranged on the surface of the multicomponent filaments or bicomponent filaments comprises at least 3% by weight, preferably at least 4% by weight of at least one filler for improving the weldability of the spunbonded web, in particular for reducing the welding temperature during thermal welding of the spunbonded web - has
Es liegt im Rahmen der Erfindung, dass die flächige Deckelkomponente und/oder die flächige Bodenkomponente der Verpackung aus zumindest einem erfindungsgemäßen Spinnvlies bzw. jeweils aus einem erfindungsgemäßen Spinnvlies und bevorzugt aus dem gleichen Spinnvliesmaterial wie die übrige Verpackungswandung bzw. wie die Seitenwandung besteht/bestehen.It is within the scope of the invention that the flat lid component and / or the flat bottom component of the packaging consists / consist of at least one spunbonded nonwoven fabric or respectively of a spunbonded nonwoven fabric according to the invention and preferably of the same spunbonded nonwoven material as the rest of the packaging wall or sidewall.
Wenn Monokomponentenfilamente für ein erfindungsgemäßes schweißbares Spinnvlies eingesetzt werden, weisen die Monokomponentenfilamente empfohlenermaßen mindestens 5 Gew.-% Füllstoff bzw. Calciumcarbonat, vorzugsweise mindestens 7 Gew.-%, zweckmäßigerweise 7 bis 25 Gew.-%, bevorzugt 8 bis 22 Gew.-% und sehr bevorzugt 10 bis 20 Gew.-% an Füllstoff bzw. an Calciumcarbonat als Füllstoff auf. Es liegt dabei im Rahmen der Erfindung, dass der Füllstoff homogen bzw. im Wesentlichen homogen in den Endlosfilamenten verteilt ist oder nach empfohlener Ausführungsform zumindest an der Oberfläche der Endlosfilamente oder im Wesentlichen an der Oberfläche der Endlosfilamente angeordnet ist.When monocomponent filaments are used for a weldable spunbonded web of the present invention, the monocomponent filaments it is recommended that at least 5% by weight of filler or calcium carbonate, preferably at least 7% by weight, expediently 7 to 25% by weight, preferably 8 to 22% by weight and very preferably 10 to 20% by weight of filler or to calcium carbonate as a filler. It is within the scope of the invention that the filler is homogeneously or substantially homogeneously distributed in the continuous filaments or is arranged according to the recommended embodiment at least on the surface of the continuous filaments or substantially on the surface of the endless filaments.
Wenn für die Seitenwandung und für die flächige Deckelkomponente und/oder die flächige Bodenkomponente der Verpackungswandung Spinnvliese aus Multikomponentenfilamenten bzw. Bikomponentenfilamenten mit einer ersten bzw. niedriger schmelzenden Kunststoffkomponente an der Außenoberfläche eingesetzt werden, ist eine besonders bevorzugte Ausführungsform der Erfindung dadurch gekennzeichnet, dass die Spinnvliese für die flächige Deckelkomponente und/oder für die flächige Bodenkomponente einen höheren Anteil an der ersten bzw. niedriger schmelzenden Kunststoffkomponente aufweisen als das Spinnvlies bzw. die Spinnvliese für die Seitenwandung der Verpackungswandung. Zweckmäßigerweise ist der Anteil der an der Außenoberfläche der Multikomponenten- bzw. Bikomponentenfilamente angeordneten ersten bzw. niedriger schmelzenden Kunststoffkomponente in den Spinnvliesen für die flächige Deckelkomponente und/oder für die flächige Bodenkomponente 1,2 mal bis 3,5 mal, bevorzugt 1,5 mal bis 2,5 mal so groß wie der Anteil der ersten bzw. niedriger schmelzenden Kunststoffkomponente in den Multikomponenten- bzw. Bikomponentenfilamenten des Spinnvlieses bzw. der Spinnvliese für die Seitenwandung der Verpackung. Die Schmelzpunkte der beiden Kunststoffkomponenten können im Übrigen auch gleich bzw. im Wesentlichen gleich sein.If spunbonded nonwoven multi-component filaments or bicomponent filaments with a first or lower melting plastic component on the outer surface are used for the side wall and for the flat lid component and / or the flat bottom component of the packaging wall, a particularly preferred embodiment of the invention is characterized in that the spun nonwovens have for the flat lid component and / or for the flat bottom component a higher proportion of the first or lower melting plastic component than the spunbond or the spunbonded fabric for the side wall of the packaging wall. Conveniently, the proportion of the arranged on the outer surface of the multicomponent or bicomponent filaments first or lower melting plastic component in the spunbonded nonwoven for the flat lid component and / or for the flat bottom component 1.2 times to 3.5 times, preferably 1.5 times to 2.5 times as large as the proportion of the first or lower melting plastic component in the multicomponent or bicomponent filaments of the spunbonded nonwoven or the spunbonded nonwoven for the side wall of the packaging. Incidentally, the melting points of the two plastic components may also be the same or substantially the same.
Eine besonders bevorzugte Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass ein erfindungsgemäßes Spinnvlies bzw. erfindungsgemäße Spinnvliese Bestandteile eines Verpackungswandungs-Laminates ist/sind und dass das Laminat bevorzugt neben dem Spinnvlies zumindest eine Folie, vorzugsweise eine Kunststofffolie aufweist. Dabei kann sowohl die Seitenwandung als auch die flächige Deckelkomponente und/oder die flächige Bodenkomponente der Verpackungswandung als ein solches Verpackungswandungs-Laminat ausgestaltet sein. Eine sehr empfohlene Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass die Folie bzw. die Kunststofffolie des Laminates auf der Innenseite der Verpackungswandung angeordnet ist.A particularly preferred embodiment of the invention is characterized in that a spunbonded fabric or spunbonded nonwoven according to the invention is / are part of a package wall laminate and that the laminate preferably has at least one film, preferably a plastic film, in addition to the spunbonded nonwoven. In this case, both the side wall and the flat lid component and / or the flat bottom component of the packaging wall can be designed as such a packaging wall laminate. A highly recommended embodiment of the invention is characterized in that the film or the plastic film of the laminate is arranged on the inside of the packaging wall.
Es liegt im Rahmen der Erfindung, dass die Verpackung - insbesondere ein Verpackungssack - eine flächige Deckelkomponente aufweist, die Bestandteil der Verpackungswandung ist und zumindest ein - zweckmäßigerweise ein oben näher spezifiziertes - schweißbares Spinnvlies aufweist und dass das Spinnvlies der Deckelkomponente mit der Seitenwandung bzw. mit dem Spinnvliesmaterial der Seitenwandung der Verpackung fest verbunden ist, insbesondere verschweißt ist. Es liegt weiterhin im Rahmen der Erfindung, dass das Spinnvlies der Deckelkomponente Multikomponentenfilamente bzw. Bikomponentenfilamente aufweist oder aus Multikomponentenfilamenten bzw. Bikomponentenfilamenten besteht bzw. im Wesentlichen besteht und dass das Massenverhältnis der an der Außenoberfläche der Filamente angeordneten ersten bzw. niedriger schmelzenden Kunststoffkomponente zu der zumindest einen zweiten bzw. höher schmelzenden Kunststoffkomponente 35 : 65 bis 50 : 50 und vorzugsweise 40 : 60 bis 45 : 55 beträgt. Wie weiter oben bereits dargelegt, können die Schmelzpunkte der beiden Kunststoffkomponenten auch gleich bzw. im Wesentlichen gleich sein.It is within the scope of the invention that the packaging - in particular a packaging bag - has a flat lid component which is part of the packaging wall and at least one - suitably specified above - weldable spunbonded and that the spunbonded the lid component with the side wall or with the spunbonded material of the side wall of the packaging is firmly connected, in particular welded. It is further within the scope of the invention that the spunbonded fabric of the cover component comprises multicomponent filaments or bicomponent filaments or consists essentially of multicomponent filaments or bicomponent filaments and that the mass ratio of the first or lower melting plastic component arranged on the outer surface of the filaments to the at least a second or higher melting plastic component 35: 65 to 50: 50 and preferably 40: 60 to 45: 55. As already explained above, the melting points of the two plastic components can also be the same or substantially the same.
Empfohlenermaßen weist die Verpackung - insbesondere der Verpackungssack - zumindest eine flächige Bodenkomponente auf, die Bestandteil der Verpackungswandung ist und die zumindest ein - insbesondere ein oben näher spezifiziertes - Spinnvlies bzw. Verpackungsspinnvlies aufweist. Dieses Spinnvlies bzw. Verpackungsspinnvlies bildet die Bodenkomponente und/oder ist Bestandteil der Bodenkomponente. Das zumindest eine Spinnvlies der Bodenkomponente wird vorzugsweise mit der Seitenwandung bzw. mit dem Spinnvliesmaterial der Seitenwandung der Verpackung fest verbunden, vorzugsweise verschweißt. Es empfiehlt sich, dass das Spinnvlies der Bodenkomponente Multikomponentenfilamente bzw. Bikomponentenfilamente aufweist oder aus Multikomponentenfilamenten bzw. Bikomponentenfilamenten besteht bzw. im Wesentlichen besteht und dass das Massenverhältnis der an der Außenoberfläche der Filamente angeordneten ersten bzw. niedriger schmelzenden Kunststoffkomponente zu der zumindest einen zweiten bzw. höher schmelzenden Kunststoffkomponente 35 : 65 bis 50 : 50 und vorzugsweise 40 : 60 bis 45 : 55 beträgt.Empfohlenermaßen, the packaging - in particular the packaging bag - at least a flat bottom component, which is part of the packaging wall and at least one - has a spunbond or packing spunbonded - in particular a specified in more detail above. This spunbond or packaging spunbonded web forms the bottom component and / or is a component of the bottom component. The at least one spunbonded fabric of the bottom component is preferably firmly connected to the side wall or with the spunbonded material of the side wall of the packaging, preferably welded. It is recommended that the spunbonded fabric of the bottom component multicomponent filaments or bicomponent filaments or consists of multicomponent filaments or bicomponent filaments or consists essentially and that the mass ratio of the arranged on the outer surface of the filaments first or lower melting plastic component to the at least one second or higher melting plastic component 35: 65 to 50: 50 and preferably 40: 60 to 45: 55.
Der Erfindung liegt die Erkenntnis zugrunde, dass ein erfindungsgemäßes schweißbares Spinnvlies bzw. schweißbares Verpackungsspinnvlies auf einfache, wenig aufwändige und problemlose Weise herstellbar ist sowie zu Verpackungen verarbeitbar ist, insbesondere verschweißbar ist. Von besonderer Bedeutung ist im Rahmen der Erfindung, dass die erforderlichen Schweißtemperaturen beim Verschweißen der Spinnvliese im Vergleich zu den aus der Praxis bekannten Verarbeitungsmaßnahmen signifikant herabgesetzt werden können. Vor allem kann mit einer homogenen Schweißtemperatur gearbeitet werden. Der Erfindung liegt weiterhin die Erkenntnis zugrunde, dass in dem erfindungsgemäßen Spinnvlies für das Verschweißen problematische Dünnstellen und Dickstellen weitgehend vermieden werden können. - Vor allem liegt der Erfindung die Erkenntnis zugrunde, dass die vorstehend dargelegten Vorteile insbesondere durch die Kombination des erfindungsgemäßen Füllstoffes - insbesondere des Calciumcarbonats - einerseits mit der Realisierung des erfindungsgemäßen Spunbond-Verfahrens andererseits zustandekommen.The invention is based on the finding that a weldable spunbonded fabric or weldable packaging spunbonded fabric according to the invention can be produced in a simple, inexpensive and problem-free manner and can be processed into packages, in particular by being welded. Of particular importance within the scope of the invention is that the welding temperatures required during welding of the spunbonded nonwovens can be significantly reduced in comparison with the processing measures known from practice. Above all, it is possible to work with a homogeneous welding temperature. The invention is further based on the finding that in the spunbonded nonwoven fabric according to the invention for problematic problematic thin areas and thick areas can be largely avoided. - Above all, the invention is based on the finding that the above Benefits in particular by the combination of the filler according to the invention - in particular of the calcium carbonate - on the one hand with the realization of the inventive spunbond process on the other hand come about.
Die Erfindung beruht unter anderem auf der Erkenntnis, dass der erfindungsgemäße Füllstoff, insbesondere in Form von Calciumcarbonat eine bessere Verschweißbarkeit des Spinnvlieses bedingt. Man geht davon aus, dass der Füllstoff bzw. das Calciumcarbonat zum einen weniger Wärme aufnimmt als die zugeordnete Kunststoffkomponente und zum anderen gleichzeitig eine höhere Wärmeleitfähigkeit als der Kunststoff aufweist. Das führt dazu, dass der Füllstoff bzw. das Calciumcarbonat die eingetragene Wärme dosiert an den zu schmelzenden bzw. zu erweichenden Kunststoff weiterleiten kann bzw. abgeben kann, so dass die zugeordnete Kunststoffkomponente gezielt aufgeschmolzen werden kann. Der Erfindung liegt außerdem die Erkenntnis zugrunde, dass ein Füllstoff in Form von Calciumcarbonat die UV-Stabilität der Filamente bzw. der Spinnvliese verbessert. Von daher ist ein zusätzlicher UV-Stabilisator für den Kunststoff des Spinnvlieses nicht erforderlich und somit kann hier Rohstoff eingespart werden. - Die optimale Verarbeitbarkeit bzw. Verschweißbarkeit eines erfindungsgemäßen schweißbaren Spinnvlieses resultiert weiterhin auch aus der vorteilhaften Ablagequalität der Filamente bzw. des Spinnvlieses bei Realisierung des erfindungsgemäßen Spunbond-Verfahrens. Es wird dabei eine wesentlich bessere Homogenität des Spinnvlieses im Vergleich zu anderen bekannten Verfahren erreicht und im Ergebnis kann die Verarbeitungstemperatur bzw. Schweißtemperatur für die erfindungsgemäßen Spinnvliese im Vergleich zu bekannten Vliesstoffen beachtlich reduziert werden.Among other things, the invention is based on the finding that the filler according to the invention, in particular in the form of calcium carbonate, requires better weldability of the spunbonded nonwoven. It is assumed that the filler or the calcium carbonate on the one hand absorbs less heat than the associated plastic component and on the other hand at the same time has a higher thermal conductivity than the plastic. The result of this is that the filler or the calcium carbonate metered in can transfer the heat introduced to the plastic to be melted or softened, so that the associated plastic component can be melted in a targeted manner. The invention is also based on the finding that a filler in the form of calcium carbonate improves the UV stability of the filaments or spunbonded nonwovens. Therefore, an additional UV stabilizer for the plastic of the spunbonded fabric is not required and thus raw material can be saved here. The optimum processability or weldability of a weldable spunbonded fabric according to the invention furthermore results from the advantageous filing quality of the filaments or the spunbonded fabric when the spunbond process according to the invention is realized. In this case, a substantially better homogeneity of the spunbonded fabric is achieved in comparison to other known methods, and as a result the processing temperature or welding temperature for the spunbonded nonwovens according to the invention can be considerably reduced in comparison to known nonwoven fabrics.
Die erfindungsgemäßen Spinnvliese sowie die daraus hergestellten Verpackungen weisen eine hervorragende Festigkeit auf. Das gilt sowohl für die Verpackungswandung an sich als auch für Verbindungsnähte - insbesondere Schweißnähte - zwischen Verpackungswandungsbereichen. Die Verpackungswandung und die Verbindungsnähte zwischen Verpackungswandungsbereichen zeichnen sich durch eine hohe mechanische Widerstandsfähigkeit aus. Bei Fallversuchen mit gefüllten Verpackungen - insbesondere von mit Zement gefüllten Verpackungssäcken - kommt es selten oder gar nicht zu einer Beschädigung der Verpackungswandung oder der Schweißnähte zwischen Verpackungswandungsbereichen. Ein Aufreißen der Verpackungswandung wird im Gegensatz zu den aus der Praxis bekannten Verpackungssäcken kaum beobachtet. Ein erfindungsgemäßes schweißbares Spinnvlies bzw. eine daraus hergestellte Verpackung weisen aber noch weitere Vorteile auf. Zum einen kann die Verpackungswandung ohne größere Probleme gereinigt werden, insbesondere von außen gereinigt werden. Zum anderen zeichnet sich die Verpackung auch durch ein ansprechendes äußeres optisches Erscheinungsbild aus. Fernerhin können bei einem erfindungsgemäß hergestellten schweißbaren Spinnvlies bzw. bei der daraus erzeugten Verpackung ausgezeichnete Barrierewirkungen eingestellt werden, so dass insbesondere eine zusätzliche äußere Beschichtung der Verpackung nicht erforderlich ist.The spunbonded nonwovens according to the invention and the packages produced therefrom have excellent strength. This applies both to the packaging wall itself and to connecting seams - in particular welded seams - between packaging wall regions. The packaging wall and the connecting seams between the packaging wall regions are characterized by high mechanical resistance. In the case of drop-in tests with filled packaging - in particular of packaging bags filled with cement - damage to the packaging wall or the weld seams between the packaging wall areas rarely or not at all occurs. A tearing open of the packaging wall is barely observed in contrast to the packaging bags known from practice. However, a weldable spunbonded fabric according to the invention or a packaging produced therefrom have further advantages. On the one hand, the Verpackungswandung can be cleaned without major problems, especially to be cleaned from the outside. On the other hand, the packaging is also characterized by an attractive exterior visual appearance. Furthermore, in the case of a weldable spunbonded fabric produced according to the invention or in the case of the packaging produced therefrom, excellent barrier effects can be set, so that in particular an additional outer coating of the packaging is not required.
Nachfolgend wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Es zeigen in schematischer Darstellung:
- Fig. 1
- Eine perspektivische Ansicht einer Verpackung in Form eines Verpackungssackes,
- Fig. 2
- einen Vertikalschnitt durch eine Vorrichtung zur Durchführung eines Verfahrens zur Herstellung eines erfindungsgemäßen schweißbaren Spinnvlieses bzw. Verpackungsspinnvlieses und
- Fig. 3
- einen Querschnitt durch ein Bikomponentenfilament eines Spinnvlieses bzw. Verpackungsspinnvlieses
- a) als Bestandteil der Verpackungswandung im Seitenwandungsbereich des Verpackungssackes
- b) als Bestandteil der Verpackungswandung der Bodenkomponente und/oder der Deckelkomponente des Verpackungssackes.
- Fig. 1
- A perspective view of a packaging in the form of a packaging bag,
- Fig. 2
- a vertical section through an apparatus for carrying out a method for producing a weldable spunbonded nonwoven fabric or spunbonded nonwoven fabric according to the invention and
- Fig. 3
- a cross section through a bicomponent filament of a spunbond or packing spunbonded nonwoven
- a) as part of the packaging wall in the side wall region of the packaging bag
- b) as part of the packaging wall of the bottom component and / or the lid component of the packaging bag.
In der
Der in
In der
Vorzugsweise und im Ausführungsbeispiel wird das Spinnvlies 2 mittels eines Kalanders 22 kalandriert bzw. vorverfestigt/verfestigt. Nach einer Ausführungsvariante ist eine Kalanderwalze 23 mit einer nicht näher dargestellten Gravur versehen und eine damit wechselwirkende bzw. zugeordnete Kalanderwalze 24 des Kalanders 22 ist bevorzugt und im Ausführungsbeispiel mit einer glatten Oberfläche ausgerüstet. Ein auf die erläuterte Weise hergestelltes Spinnvlies 2 kann einfach und problemlos für eine Verpackungswandung (Seitenwandung 5 und/oder Bodenkomponente 7 und/oder Deckelkomponente 8) des Verpackungssackes 1 eingesetzt werden.Preferably and in the exemplary embodiment, the spun-bonded
In der
Dagegen weisen die Bikomponentenfilamente gemäß
Das Massenverhältnis der niedriger schmelzenden Kunststoffkomponente (Mantelkomponente 9) zur höher schmelzenden Kunststoffkomponente (Kernkomponente 10) mag bei der Ausführungsform nach
Claims (10)
- A weldable spunbond (2), in particular a weldable packaging spunbond as part of packagings or packaging bags (1), wherein the spunbond (2) comprises continuous filaments (3) of thermoplastic material, wherein the continuous filaments (3) are configured as multicomponent filaments, in particular as bicomponent filaments, wherein at least one component of these continuous filaments (3) comprises at least 3 wt.%, preferably at least 4 wt.% of at least one filler (4) to improve the weldability of the spunbond (2) - in particular to reduce the welding temperature during thermal welding of the spunbond (2) - characterized in that a first plastic component arranged on the surface of the multicomponent filaments or bicomponent filaments
either has a lower melting point that the second plastic component of the filaments and that the filler (4) is contained at least in the first lower-melting plastic component
or has the same melting point as a second plastic component of the filaments and that the filler (4) is only contained in the first same-melting plastic component. - The weldable spunbond according to claim 1, characterized in that the continuous filaments or at least one component of the continuous filaments (3) contains 4 to 25 wt.% of the filler (4), preferably 5 to 20 wt.% and very preferably 6 to 15 wt.% of the filler (4).
- The weldable spunbond according to one of claims 1 or 2, characterized in that the filler (4) is a metal salt, preferably an alkaline earth metal salt, preferably a calcium salt and very preferably calcium carbonate.
- The weldable spunbond according to one of claims 1 to 3, characterized in that the multicomponent filaments or the bicomponent filaments have a core/sheath configuration and wherein the sheath component (9) preferably forms the same- or lower-melting-point plastic component of the filament.
- The weldable spunbond according to claim 4, characterized in that the filler (4) is arranged at least in the sheath component (9) of the bicomponent filaments or multicomponent filaments.
- The weldable spunbond according to one of claims 1 to 5, characterized in that the mass ratio of the first, or same- or lower-melting plastic component to the second, higher-melting plastic component is 10:90 to 35:65, preferably 15:85 to 35:65, preferably 25:75 to 50:50 and very preferably 30:70 to 45:55.
- The weldable spunbond according to one of claims 1 to 6, characterized in that the spunbond (2) is a calendered spunbond (2) and at least one surface of the spunbond (2) is calendered smooth.
- A method for producing a weldable spunbond (2) or packaging spunbond according to one of claims 1 to 7, characterized in that continuous filaments (3) are spun by means of a spinneret 11), are cooled in a cooling device (13), then stretched in a stretching device (8) and are then deposited on a deposition device to produce the spunbond (2).
- The method according to claim 8, characterized in that the spunbond (2) is calendered by means of a calender (22), wherein the calender (22) has an embossing surface of 10 to 90% and preferably 18 to 30% and wherein preferably the embossing depth of the calender engraving is 0.1 to 0.6 mm, preferably 0.2 to 0.4 mm.
- The method according to one of claims 8 or 9, characterized in that the number of engraving points of the calender (22) is greater than 30/cm2, preferably greater than 40/cm2.
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
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EP16159620.0A EP3216905B1 (en) | 2016-03-10 | 2016-03-10 | Weldable spun-bonded fabric, method for the preparation of a weldable spun-bonded fabric and package |
EP18206141.6A EP3480352B1 (en) | 2016-03-10 | 2016-03-10 | Packaging |
JOP/2020/0179A JOP20200179A1 (en) | 2016-03-10 | 2016-03-10 | Packaging |
DK16159620.0T DK3216905T3 (en) | 2016-03-10 | 2016-03-10 | Weldable spunbonded fabric, method of making a weldable spunbonded fabric and packaging |
DK18206141.6T DK3480352T3 (en) | 2016-03-10 | 2016-03-10 | Packing |
US15/450,986 US20180002851A1 (en) | 2016-03-10 | 2017-03-06 | Weldable spunbond fabric, method of making same, and packaging made therefrom |
MX2017003093A MX2017003093A (en) | 2016-03-10 | 2017-03-09 | Weldable spunbond fabric, method of making same, and packaging made therefrom. |
MX2020009501A MX2020009501A (en) | 2016-03-10 | 2017-03-09 | Weldable spunbond fabric, method of making same, and packaging made therefrom. |
CN201710268887.6A CN107177935B (en) | 2016-03-10 | 2017-03-10 | Weldable spunbonded nonwoven, method for producing weldable spunbonded nonwoven and packaging |
JOP/2017/0061A JO3652B1 (en) | 2016-03-10 | 2017-03-12 | Weldable spun-bonded fabric, method for the preparation of a weldable spun-bonded fabric and packaging |
US17/092,494 US20210054550A1 (en) | 2016-03-10 | 2020-11-09 | Method of making a spun-bonded nonwoven for packaging |
Applications Claiming Priority (1)
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EP16159620.0A EP3216905B1 (en) | 2016-03-10 | 2016-03-10 | Weldable spun-bonded fabric, method for the preparation of a weldable spun-bonded fabric and package |
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EP18206141.6A Division EP3480352B1 (en) | 2016-03-10 | 2016-03-10 | Packaging |
EP18206141.6A Division-Into EP3480352B1 (en) | 2016-03-10 | 2016-03-10 | Packaging |
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EP3216905B1 true EP3216905B1 (en) | 2019-07-03 |
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EP16159620.0A Active EP3216905B1 (en) | 2016-03-10 | 2016-03-10 | Weldable spun-bonded fabric, method for the preparation of a weldable spun-bonded fabric and package |
EP18206141.6A Active EP3480352B1 (en) | 2016-03-10 | 2016-03-10 | Packaging |
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US12064827B1 (en) * | 2021-06-13 | 2024-08-20 | Garvey Holding LLC | Methods, systems, and apparatus for joining metallic fabrics |
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JP2000504791A (en) * | 1996-02-12 | 2000-04-18 | ファイバービジョンズ アクティーゼルスカブ | Particle-containing fiber |
FR2749860B1 (en) * | 1996-06-17 | 1998-08-28 | Freudenberg Spunweb Sa | NON WOVEN TABLECLOTH FORMED OF VERY THIN CONTINUOUS FILAMENTS |
JP2992505B2 (en) * | 1998-04-16 | 1999-12-20 | 難波プレス工業株式会社 | One-piece molding of hollow body with olefin resin composite |
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US7338916B2 (en) * | 2004-03-31 | 2008-03-04 | E.I. Du Pont De Nemours And Company | Flash spun sheet material having improved breathability |
DE602005016304D1 (en) * | 2004-12-17 | 2009-10-08 | Exxonmobil Chem Patents Inc | POLYMER BLENDS AND NONWOVENS |
DE602006004754D1 (en) * | 2005-07-29 | 2009-02-26 | Fiberweb Inc | LIQUID, NON-FLUID LUBRICANT FROM BICOMPONENT FILAMENTS |
US20070122614A1 (en) * | 2005-11-30 | 2007-05-31 | The Dow Chemical Company | Surface modified bi-component polymeric fiber |
DE102006020488B4 (en) * | 2006-04-28 | 2017-03-23 | Fitesa Germany Gmbh | Nonwoven fabric, process for its preparation and its use |
DE102006044496A1 (en) * | 2006-09-21 | 2008-04-17 | Fiberweb Corovin Gmbh | Lightweight spunbonded fabric with special mechanical properties |
DE102007018579B4 (en) * | 2007-04-18 | 2012-03-15 | Abts- Advanced Bag Technology & Service Gmbh | Cement bag and manufacturing process |
CN101532211A (en) * | 2009-04-19 | 2009-09-16 | 山东泰鹏无纺有限公司 | Regenerated terylene spun-bonded hot rolling non-woven fabric |
CN102086566A (en) * | 2010-11-16 | 2011-06-08 | 安徽润维无纺布有限公司 | Polypropylene spun-bonded non-woven material capable of being degraded acceleratedly and process thereof |
-
2016
- 2016-03-10 EP EP16159620.0A patent/EP3216905B1/en active Active
- 2016-03-10 EP EP18206141.6A patent/EP3480352B1/en active Active
- 2016-03-10 DK DK16159620.0T patent/DK3216905T3/en active
- 2016-03-10 JO JOP/2020/0179A patent/JOP20200179A1/en unknown
- 2016-03-10 DK DK18206141.6T patent/DK3480352T3/en active
-
2017
- 2017-03-06 US US15/450,986 patent/US20180002851A1/en not_active Abandoned
- 2017-03-09 MX MX2017003093A patent/MX2017003093A/en active IP Right Grant
- 2017-03-09 MX MX2020009501A patent/MX2020009501A/en unknown
- 2017-03-10 CN CN201710268887.6A patent/CN107177935B/en active Active
- 2017-03-12 JO JOP/2017/0061A patent/JO3652B1/en active
-
2020
- 2020-11-09 US US17/092,494 patent/US20210054550A1/en active Pending
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
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JOP20200179A1 (en) | 2017-06-16 |
US20210054550A1 (en) | 2021-02-25 |
CN107177935A (en) | 2017-09-19 |
MX2017003093A (en) | 2018-08-15 |
US20180002851A1 (en) | 2018-01-04 |
DK3480352T3 (en) | 2020-04-27 |
EP3480352B1 (en) | 2020-02-12 |
EP3480352A1 (en) | 2019-05-08 |
EP3216905A1 (en) | 2017-09-13 |
CN107177935B (en) | 2021-11-26 |
MX2020009501A (en) | 2021-05-20 |
JO3652B1 (en) | 2020-08-27 |
DK3216905T3 (en) | 2019-09-23 |
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