EP3406780A1 - Non-tissé meltblown à haute résistance à l'écrasement - Google Patents

Non-tissé meltblown à haute résistance à l'écrasement Download PDF

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Publication number
EP3406780A1
EP3406780A1 EP17172180.6A EP17172180A EP3406780A1 EP 3406780 A1 EP3406780 A1 EP 3406780A1 EP 17172180 A EP17172180 A EP 17172180A EP 3406780 A1 EP3406780 A1 EP 3406780A1
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EP
European Patent Office
Prior art keywords
nonwoven fabric
meltblown nonwoven
filaments
meltblown
temperature
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EP17172180.6A
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German (de)
English (en)
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EP3406780B1 (fr
Inventor
Axel Nickel
Norbert Jording
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Individual
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Individual
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Priority to EP17172180.6A priority Critical patent/EP3406780B1/fr
Priority to CN201880049523.1A priority patent/CN111226001B/zh
Priority to PCT/EP2018/063287 priority patent/WO2018215402A1/fr
Priority to US16/633,065 priority patent/US20200165759A1/en
Publication of EP3406780A1 publication Critical patent/EP3406780A1/fr
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Publication of EP3406780B1 publication Critical patent/EP3406780B1/fr
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    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series
    • 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
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
    • D10B2321/022—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polypropylene

Definitions

  • the present invention relates to a tempered meltblown nonwoven fabric having high compressive strength and, more particularly, to a tempered bulk meltblown nonwoven fabric having high compressive strength. Furthermore, the present invention relates to a method for producing such a tempered meltblown nonwoven fabric.
  • a well-known aerodynamic process is the meltblown process according to the Exxon principle, as this example in the US 3,755,527 is described.
  • a low viscosity polymer is extruded through capillaries located at a nozzle tip.
  • the forming polymer droplets are then acted upon from two sides with a called air blast, having a high temperature and velocity, air flow, as a result of which the polymer droplets are drawn to a polymer free jet in the form of fine filaments.
  • meltblown nonwoven webs or meltblown nonwoven webs are used for a variety of applications, such as barrier functions in the hygiene area. For these applications, the filaments are deposited on the support as a flat, two-dimensional nonwoven fabric.
  • meltblown nonwovens which contain, in addition to the meltblown filaments, polyethylene terephthalate staple fibers incorporated therein. These nonwovens are characterized by an increased resilience, which is why the nonwoven fabric has a better relaxation. However, these nonwovens are composed of two incompatible polymers, which precludes recycling, which in turn leads to a major cost penalty.
  • a major disadvantage of the known meltblown nonwovens and in particular the known voluminous meltblown nonwovens is their relatively low stiffness and the resulting low compressive strength, especially at higher loads. Furthermore, these materials are usually limp, which means that they already deform under dead weight, but no specific Keep shape. For these reasons, these known meltblown nonwovens and in particular known voluminous meltblown nonwovens are difficult to permanently convert into a predetermined shape. Deformation usually results in addition to a compression of these nonwovens.
  • the object of the present invention is therefore to provide a meltblown nonwoven and in particular a voluminous meltblown nonwoven, which has an increased stiffness and in particular an increased compression hardness, especially at higher loads, and which is also easy to convert into a predetermined permanent shape.
  • this object is achieved by a tempered meltblown nonwoven obtainable by a process in which at least part of the meltblown nonwoven fabric is subsequently tempered at a temperature between the glass transition temperature and 0.1 ° C. below the melting temperature of the filaments of the meltblown nonwoven fabric.
  • meltblown nonwoven fabric according to the invention is also characterized by a significantly increased compression hardness, especially at higher loads, such as 40% or 60% compression from. Furthermore, the meltblown nonwoven fabric of the present invention is easily formed into a desired shape during annealing.
  • the degree of crystallization of the amorphous nonwoven filaments is increased by the annealing according to the invention.
  • the filament fineness as well as the nonwoven structure is not changed or at most negligible, so that the nonwoven fabric after tempering its other properties, such as in the case of a bulky nonwoven fabric, its thickness-specific acoustic properties, such as acoustic absorption, retains.
  • meltblown nonwoven fabric is understood to be a nonwoven fabric produced by one of the known meltblown processes, regardless of whether it is a flat 2-dimensional nonwoven fabric or a voluminous nonwoven fabric. Processes for producing such meltblown nonwoven fabrics are described, for example, in US Pat US 4,118,531 , in the US 4,375,446 , in the US 4,380,570 and in the DE 17 85 712 C3 described.
  • annealing generally means a heat treatment, ie heating the meltblown nonwoven fabric at the aforementioned temperature for a certain period of time.
  • the meltblown nonwoven fabric is subsequently tempered, at a temperature between the glass transition temperature and 0.1 ° C below the melting temperature of the filaments of the meltblown nonwoven fabric lies.
  • both the glass transition temperature and the melting temperature of the filaments of the meltblown nonwoven fabric refers to the corresponding temperatures of the present at this time meltblown nonwoven fabric.
  • the inventors have found that the melting temperature of the filaments of the meltblown nonwoven fabric may increase by about 10 to 20 ° C due to annealing depending on the conditions during annealing. Therefore, the temperature during annealing can be increased.
  • the annealing may be performed so that the meltblown nonwoven fabric first annealed at a temperature of 150 ° C, after a certain period of, for example 10 minutes, the temperature to 155 ° C (which is 2 ° C below the melting temperature, which the filaments of the meltblown nonwoven fabric at this time have) is increased, before after another period of, for example, another 10 minutes, the temperature is increased to 165 ° C (which is 2 ° C below the melting temperature that the filaments of the meltblown nonwoven fabric have at that time).
  • meltblown nonwoven fabric is annealed in sections or over the entire surface.
  • a certain subregion of the meltblown nonwoven fabric or several subregions of the meltblown nonwoven fabric can be tempered, whereas the remainder of the meltblown nonwoven fabric remains unannealed. It is also possible and particularly preferred according to the present invention, to anneal the entire meltblown nonwoven fabric.
  • the annealing is carried out at a temperature which is between 15 ° C below the melting temperature and 1 ° C below the melting temperature and most preferably between 10 ° C below the melting temperature and 2 ° C below the melting temperature, such as at about 5 ° C below the melting temperature (ie, for example, between 8 ° C below the melting temperature and 2 ° C below the melting temperature) of the filaments of meltblown nonwoven fabric is.
  • the duration of tempering depends on the temperature to which the meltblown nonwoven fabric is heated during tempering, where a lower tempering temperature tends to require a longer annealing time.
  • an annealing period of 1 minute to 10 days and in particular of 2 minutes to 24 hours has proven to be suitable.
  • the annealing time is 2 minutes to 2 hours, more preferably 2 to 60 minutes, and most preferably 2 to 10 minutes.
  • the meltblown nonwoven fabric is tempered for 2 minutes to 2 hours at a temperature which is between 20 ° C below the melting temperature and 1 ° C below the melting temperature of the filaments of meltblown nonwoven fabric. More preferably, the annealing of the meltblown nonwoven fabric is carried out for 2 to 60 minutes at a temperature which is between 15 ° C below the melting temperature and 2 ° C below the melting temperature of the filaments of the meltblown nonwoven fabric, and most preferably the annealing of the Meltblown nonwoven fabric for 2 to 10 minutes at a temperature which is about 5 ° C below the melting temperature, ie between 8 ° C below the melting temperature and 2 ° C below the melting temperature of the filaments of the meltblown nonwoven fabric.
  • the melting point of the meltblown nonwoven fabric during annealing may increase due to the increase in the degree of crystallinity.
  • the distance between the annealing temperature and the melting point of the meltblown nonwoven fabric during tempering would increase more and more and thus the required tempering time would be comparatively long.
  • annealing it is proposed to increase the temperature during the annealing to keep the annealing temperature always just below (for example, about 2 ° C or 5 ° C) below the melting point of the meltblown nonwoven fabric which increases during annealing , For example, if the melting temperature of the filaments of the meltblown nonwoven prior to annealing is 152 ° C, and the melt temperature of the filaments of the meltblown nonwoven fabric increases to 170 ° C during annealing, for example, annealing may be carried out as set forth above.
  • meltblown nonwoven fabric is first annealed at a temperature of 150 ° C, after a certain period of, for example 10 minutes, the temperature to 155 ° C (which is 2 ° C below the melting temperature, which the filaments of meltblown nonwoven fabric at this time). The temperature is increased to 165 ° C (which is 2 ° C below the melting temperature that the filaments of the meltblown nonwoven fabric at this time have) after another period of, for example, 10 minutes again.
  • the present invention is not limited in the way the meltblown nonwoven fabric is tempered.
  • annealing has proven to be not only simple, but particularly effective, in which the meltblown nonwoven fabric is exposed to hot air and / or superheated steam.
  • the hot air or overheated water vapor in this embodiment has a temperature which corresponds to that to which the meltblown nonwoven fabric is to be heated during the annealing.
  • the Meltblown nonwoven fabric in this embodiment with hot air or superheated steam applied by the hot melt or superheated steam flows around the meltblown nonwoven fabric or more preferably flows through.
  • the meltblown nonwoven fabric is preferably annealed in an oven having at least one blow box disposed so that the hot air or superheated steam can be blown into the meltblown nonwoven fabric. If only one or more subregions of the meltblown nonwoven fabric are to be tempered, the blower box is to be designed so that the hot air or superheated steam is blown only into or to the partial area (s) of the meltblown nonwoven fabric to be tempered.
  • the meltblown nonwoven fabric is bulky
  • the meltblown nonwoven fabric is annealed in an oven having at least one suction box, which is arranged so that the meltblown nonwoven fabric flowing air or superheated steam can be sucked off to ensure a safe flow.
  • a suction on both sides it is ensured that the nonwoven fabric with the hot air or the superheated steam is safely flowed through and also the nonwoven fabric does not collapse, but maintains its volume.
  • the meltblown nonwoven fabric is tempered in an oven having at least one blow box and at least one suction box, wherein the at least one blow box is arranged so that the hot air or superheated steam in the meltblown Nonwoven fabric can be blown, and, wherein the at least one suction box is arranged so that the air flowing through the meltblown nonwoven fabric or superheated steam can be sucked off.
  • the furnace comprises two blow boxes and one or two suction boxes, the suction box being located downstream of the first or second blow box in the case of a suction box, and the two suction boxes being downstream of the first and second blow boxes in the case of two suction boxes are arranged.
  • the present invention is not particularly limited in the basis weight of the meltblown nonwoven fabric.
  • the meltblown nonwoven fabric has a basis weight of from 30 to 600 g / m 2 , more preferably from 100 to 400 g / m 2, and most preferably from 250 to 350 g / m 2 , such as from 350 g / m 2 ,
  • the meltblown nonwoven fabric according to the invention may in particular be a voluminous meltblown nonwoven fabric.
  • the meltblown nonwoven fabric is a bulk meltblown nonwoven fabric having a density of from 5 to 50 kg / m 3 , preferably from 8 to 25 kg / m 3, and more preferably from 10 to 20 kg / m 3 .
  • the meltblown nonwoven fabric of the present invention is not particularly limited.
  • the filaments of the meltblown nonwoven fabric may consist of any polymer which has a melting point suitable for extrusion and a melt viscosity sufficiently low for the meltblown process, such as polyolefins, polyamides, polyesters, polyphenylene sulfides, polytetrafluoroethylene or a polyetheretherketone.
  • filaments have proven to be particularly suitable which are composed of a polymer selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polypropylene and polyethylene.
  • the filaments of the meltblown nonwoven fabric according to the present invention are composed of isotactic polypropylene since it has been found that For filaments made of isotactic polypropylene, the degree of crystallization during annealing is particularly well increased.
  • the meltblown nonwoven fabric in a shaped body in order to convert the meltblown nonwoven fabric during the tempering into a predetermined shape.
  • This can be achieved, for example, in that the shaped body in which the meltblown nonwoven fabric is tempered is at least partially designed as a sieve, so that the meltblown nonwoven fabric flows through the annealing with hot air or with superheated steam and / or flow around it can.
  • meltblown nonwoven fabric after heating, but before cooling into a shaped body and thus to convert it into a predetermined shape in order to reform it, wherein the meltblown nonwoven fabric is cooled in the mold to complete the annealing process ,
  • the meltblown nonwoven fabric can be formed by the annealing as a stamped part in a certain shape, such as in a hemisphere.
  • the tempered and shaped meltblown nonwoven fabric is significantly more dimensionally stable than the starting material and retains its shape as much as possible. Accordingly, the meltblown nonwoven fabric can take over after tempering forces, so that can be dispensed with after molding on additional stiffening structural elements in the meltblown nonwoven fabric.
  • meltblown nonwoven fabric in the meltblown nonwoven fabric at least one arranged in the thickness direction of the meltblown nonwoven fabric spacer is provided, which has a length which is greater than the thickness of the meltblown nonwoven fabric. This is advantageous, for example, when the meltblown nonwoven fabric is to be used as an acoustic absorber.
  • an intrinsically rigid molded article is obtained in which, due to the spacer (s) - when acting as an acoustic absorber in front of a reflective plane, such as the sheet metal wall an automobile, is mounted - a not insignificant air gap is formed between the absorber and the reflecting plane, wherein the thus created additional air volume acts as an integral part of the absorber structure.
  • a superior absorber effect with a significantly reduced cost of materials a molded part of meltblown nonwoven fabric.
  • the trapped between absorber and wall volume of air causes a significant improvement in the low-frequency behavior of the structure, which otherwise can only be achieved by correspondingly thick and therefore heavy and expensive materials.
  • the volume of air between absorber and wall described above can also be provided by a wall structure with a flat absorber or a structure of the wall and the absorber, wherein the inherent stiffness of the absorber for the permanent formation of the air volume is required.
  • the meltblown nonwoven fabric to be subjected to the tempering may be made by any of the known meltblown processes, such as those described in U.S. Pat US 4,118,531 , in the US 4,375,446 , in the US 4,380,570 or in the DE 17 85 712 C3 described method.
  • meltblown process nonwoven fabric is produced by externally impinging and drawing air flowing through a nozzle with molten air before the filaments formed thereby are deposited on a support and cooled become.
  • the support is preferably a double suction drum.
  • meltblown nonwoven fabric at least in sections and preferably over the entire surface measured according to DIN EN ISO 3386 compressive stress at 60% compression of at least 2 kPa, preferably of at least 8 kPa, more preferably of at least 12 kPa , most preferably at least 20 kPa and most preferably at least 30 kPa.
  • compressive strength at 60% compression is understood to mean the required compressive stress under which a material sample undergoes a reduction in thickness by 60% of the initial thickness.
  • the preload for determining the initial thickness of the material is reduced to 0.014 kPa to account for the very low compressive strength of the untempered material. Deviating compression levels or other test conditions may result in different compressive stresses with non-linear relationships to the stated values.
  • the annealing temperature is always at least 0.1 ° C below the current (ie, the present melt temperature) of the filaments of the meltblown nonwoven fabric.
  • the present invention makes it possible to increase the degree of crystallization of the filaments of meltblown nonwoven fabrics in sections or over the entire surface, thus increasing the stiffness of meltblown nonwovens in sections or over the entire surface.
  • the present invention can be used to anneal the meltblown nonwoven fabric over the entire surface and thus to increase the degree of crystallization in the meltblown nonwoven fabric over the entire surface.
  • inherently rigid, pressure-stable two-dimensional components can be produced.
  • the molded meltblown nonwoven fabric can be annealed only part of the surface and so the degree of crystallinity in the meltblown nonwoven fabric are raised only part of the area, so as to increase the rigidity only on component-specific areas or in the continuous grid of the component.
  • edge regions of the component can be tempered from the meltblown nonwoven fabric so as to make the edge regions of the component more rigid, for example in order to increase the stackability of the component from the meltblown nonwoven fabric.
  • a component can be formed by tempering from the meltblown nonwoven fabric and the degree of crystallization can be increased over its entire area in order to produce intrinsically stiff three-dimensional components.
  • locally compressed or consolidated areas can expand the functionality, for example, for the formation of contact surfaces at attachment points.
  • a further subject matter of the present invention is a tempered meltblown nonwoven whose filaments, at least in sections and preferably over the entire surface, have a crystallization degree of from 20 to 80%, preferably from 30 to 75%, more preferably from 40 to 75% and most preferably from 50 to 70%. exhibit.
  • the present invention relates to a meltblown nonwoven fabric with an at least in sections and preferably over the entire surface measured on the basis of DIN EN ISO 3386 compression hardness at 60% compression of at least 2 kPa.
  • the meltblown nonwoven fabric according to the invention has a compressive strength at 60% compression of at least 8 kPa, more preferably of at least 12 kPa, most preferably of at least 20 kPa and most preferably of at least 30 kPa.
  • the meltblown nonwoven fabric be annealed in step b) for 2 minutes to 2 hours at a temperature that is between 20 ° C below the melt temperature and 1 ° C below the melt temperature of the filaments of the meltblown nonwoven web ,
  • the Fig. 1 schematically shows a belt furnace 10 for producing a tempered meltblown nonwoven fabric according to an embodiment of the present invention.
  • the open 10 comprises on wheels 12 guided and driven air-permeable belts 14, 14 ', over which the meltblown nonwoven fabric 15 is guided into and through the oven 10.
  • the oven 10 are above and below the two bands 14, 14 ', seen in the conveying direction from right to left in this order, a first blow box 16, a suction box 18 and a second blow box 16' are arranged.
  • the meltblown nonwoven fabric 15 is passed through the oven 10 from right to left on the lower belt 14.
  • meltblown nonwoven fabric 15 when passing through the blow boxes 16, 16 ', hot air is flowed into and through the meltblown nonwoven fabric 15 to raise the filaments of the meltblown nonwoven fabric 15 to the desired tempering temperature. In the region of the suction box 18, the air flowing through the meltblown nonwoven fabric 15 is sucked off in order to ensure that the meltblown nonwoven fabric 15 is safely flowed through by the hot air and the meltblown nonwoven fabric 15 also does not collapse, but maintains its volume.
  • Fig. 1 schematically shows a mold 20 for simultaneously molding and annealing a meltblown nonwoven fabric 15 according to another embodiment of the present invention.
  • the meltblown nonwoven fabric 15 is held in the desired shape from both sides by appropriately shaped screens 22, 22 ', from which the mold 20 is assembled, and heated to the desired temperature by circulating or flowing hot air for annealing.
  • the nonwoven mat produced thereby maintains the embossed shape and is dimensionally stable.
  • meltblown nonwoven fabric having a basis weight of 300 g / m 2 and with a density of 15 kg / m 3 was prepared by the in the US 4,375,446 described meltblown method was performed. Subsequently, this meltblown nonwoven fabric was annealed in a convection oven for 10 minutes at 158 ° C. By inserting the cold nonwoven fabric and opening the oven door, the initial temperature was below the melting point of the filaments of the untempered nonwoven fabric.
  • the sound absorption coefficient of the tempered meltblown nonwoven fabric was measured as a function of the thickness-normalized frequency.
  • the results are in the Fig. 3 in curve A compared to the values obtained with the untempered meltblown nonwoven fabric prepared in the comparative example (curve B).
  • the unit of the abscissa is the measurement frequency x absorber thickness / 15 mm. The comparison of the results shows that the tempering according to the invention has no negative effects on the sound absorption properties of the nonwoven fabric.
  • a portion of the annealed meltblown nonwoven fabric was attached directly to a car body panel, while another portion of the tempered meltblown nonwoven fabric was attached to a vehicle body panel 10 mm apart and another portion of the tempered meltblown nonwoven fabric spaced apart of 40 mm was attached to a car body wall. Thereafter, the absorption coefficient was determined as a function of the frequency for the three structures.
  • the results are in the Fig. 4
  • the curve A shows the values for the meltblown nonwoven fabric attached directly to the vehicle body panel
  • the curve B shows the values for the meltblown nonwoven fabric attached to the vehicle body wall at a distance of 10 mm
  • the curve C the Shows values for the meltblown nonwoven fabric attached to the vehicle body wall at a distance of 40 mm.
  • a comparison of the values obtained shows that the volume of air trapped between the nonwoven fabric and the body wall achieves a significant improvement, in particular of the low-frequency absorption properties of the structure, which otherwise can only be achieved by correspondingly thick and thus also heavy and expensive materials.
  • a tempered meltblown nonwoven fabric was made according to the procedure described in Example 1, except that annealing was performed at 155 ° C for 10 minutes.
  • a tempered meltblown nonwoven fabric was prepared according to the procedure described in Example 1, except that annealing was performed at 155 ° C for 25 minutes.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
EP17172180.6A 2017-05-22 2017-05-22 Non-tissé meltblown à haute résistance à l'écrasement Active EP3406780B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP17172180.6A EP3406780B1 (fr) 2017-05-22 2017-05-22 Non-tissé meltblown à haute résistance à l'écrasement
CN201880049523.1A CN111226001B (zh) 2017-05-22 2018-05-22 具有高压缩硬度的经回火的熔喷非纺织物
PCT/EP2018/063287 WO2018215402A1 (fr) 2017-05-22 2018-05-22 Tissu non tissé trempé obtenu par fusion-soufflage ayant une dureté de compression élevée
US16/633,065 US20200165759A1 (en) 2017-05-22 2018-05-22 Tempered Melt-Blown Nonwoven Having a High Compression Hardness

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Application Number Priority Date Filing Date Title
EP17172180.6A EP3406780B1 (fr) 2017-05-22 2017-05-22 Non-tissé meltblown à haute résistance à l'écrasement

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EP3406780A1 true EP3406780A1 (fr) 2018-11-28
EP3406780B1 EP3406780B1 (fr) 2020-01-08

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US (1) US20200165759A1 (fr)
EP (1) EP3406780B1 (fr)
CN (1) CN111226001B (fr)
WO (1) WO2018215402A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4438775A1 (fr) * 2023-03-28 2024-10-02 Iksung Co. Ltd. Dispositif de fabrication d'une bande de fibres soufflées à l'état fondu en polyéthylène téréphtalate et procédé de fabrication l'utilisant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3425099A1 (fr) * 2017-07-03 2019-01-09 Axel Nickel Non-tissé de fusion-soufflage ayant une capacité d'empilage et de stockage améliorée

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755527A (en) 1969-10-09 1973-08-28 Exxon Research Engineering Co Process for producing melt blown nonwoven synthetic polymer mat having high tear resistance
US4118531A (en) 1976-08-02 1978-10-03 Minnesota Mining And Manufacturing Company Web of blended microfibers and crimped bulking fibers
DE1785712C3 (de) 1967-09-29 1979-01-11 Celanese Corp., New York, N.Y. (V.St.A.) Fülliger Vliesstoff und seine Verwendung
US4375446A (en) 1978-05-01 1983-03-01 Toa Nenryo Kogyo Kabushiki Kaisha Process for the production of a nonwoven fabric
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EP3406780B1 (fr) 2020-01-08
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CN111226001A (zh) 2020-06-02
WO2018215402A1 (fr) 2018-11-29

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