CN103276535B - A kind of double-component melt-blown non-woven material and manufacture method thereof - Google Patents
A kind of double-component melt-blown non-woven material and manufacture method thereof Download PDFInfo
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- CN103276535B CN103276535B CN201310242547.8A CN201310242547A CN103276535B CN 103276535 B CN103276535 B CN 103276535B CN 201310242547 A CN201310242547 A CN 201310242547A CN 103276535 B CN103276535 B CN 103276535B
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Abstract
The present invention discloses a kind of double-component melt-blown non-woven material and manufacture method thereof.This non-woven material comprises ultra-fine meltblown fibers and staple fibre, it is characterized in that the longitudinal cross-section of described non-woven material has " Z " shape supporting structure continuing to extend, and should directly be formed by the ultra-fine meltblown fibers of a part by " Z " shape support, have staple fibre at the middle uniform filling of " Z " shape support, ultra-fine meltblown fibers and staple fibre rely on the Thermoadhesive of the ultra-fine meltblown fibers of another part of random distribution self to be bonded as non-woven material entirety; The mass percent of ultra-fine meltblown fibers in non-woven material is greater than 50%.The technique of this manufacture method is: produce ultra-fine meltblown fibers stream in conventional manner on the one hand; Make on the other hand staple fibre flow through airflow blow mode to converge at random and deliver among ultra-fine meltblown fibers stream, form blended fiber stream, be then gathered into net with single collector and namely obtain described non-woven material; The angle that blows of described airflow blow mode is 80-95 °.
Description
Technical field
The present invention relates to meltblown nonwoven field, be specially a kind of double-component melt-blown non-woven material and manufacture method thereof.The vertical section inside of this non-woven material has a kind of " Z " shape supporting structure of component.
Background technology
In prior art, meltblown nonwoven (nonwoven fabric, bondedfibre fabric) is based on one-component PP melt spraying non-woven fabrics.Its manufacture method does not have two kinds, and one collects fiber with plain net collector (i.e. a kind of polyester lace curtaining with holes or Metal screen cloth), the product consolidation formed, fluffy, is used for mouth mask filter material, air filtering material or liquid filter material; Another kind then collects fiber with twin-roll collector (i.e. a kind of cylinder with holes), and the product formed is fluffy, is mainly used in heat insulating material formed.This one-component melt spraying non-woven fabrics has formed important commercial value.
Due to some characteristics of one-component melt-blown nonwoven cloth material, such as, one-component melt-blown material intensity is low, wash durability is poor, compression strength is low, causes the service life of product short, makes it be restricted in the application, especially in heat insulating material formed field.Therefore, the double component molten and jetted non-woven cloth products improved is come out one after another: a kind of double-component melt-blown non-woven material product of such as patent ZL200610130079.5 bibliographical information, be adopt twin (double) screw extruder and there is twin-channel die head, form the double component molten and jetted fiber of parallel type by spinnerets.Fibre fineness is ultra-fine afterwards in the bicomponent fibers division that focuses on of this technology, because the specific area of fiber increases, thus improves the filter efficiency doing filtering material nonwoven fabric.But as heat insulating material formed, the problem that this material resistance to compression that still ultra-fine meltblown fibers can not be avoided to cause is low, thus the thermal property that fabric cannot be provided permanent.
A kind of double-component melt-blown non-woven material product (ZL200910242869.X) is also had in prior art.This patented technology describes a kind of preparation method adding acid fiber by polylactic in meltblown polypropylene fibres, and provides the two component filtration material of a kind of PP/PLA.The processing method of this patent utilizes air-flow to add a kind of PLA staple fibre after meltblown fibers is extruded, before one-tenth net, after making two kinds of fibers mixture, recycling plain net collector is gathered into net, the feature of products obtained therefrom is that Gao Rongchen leads and low pressure drop, there is good bulkiness and pollutant, be suitable for doing filtering material.
In prior art, 3M company proposes a kind of fiber matting of improvement.Two component bondedfibre fabrics (see patent ZL03825683.5) of this bondedfibre fabric to be a kind of vertical section be " C " shape structure.Describe according to this patent, " C " shape structure that this product possesses because of it, thus provide incompressible characteristic.The part of " C " shape structure is meltblown fibers, and two " C " shape structure central filler staple fibers, enhance warmth retention property; Its processing method is blown in the fiber of melt-blowing equipment ejection through air-flow by staple fiber, recycles two cylinders collections of rotating in opposite directions and form.But this " C " shape structural material can form stress point at the mid portion of " C " shape structure when being compressed, the fiber of stress point can, distortion pleating because of pressure, thus affects the resilience of material.
In prior art, the product of a kind of fiber by directly being formed in " C " shape structure in fabric is mentioned (see Fig. 5), although the preparation method of this fabric fills artificial fibre in the fiber directly formed, its collection mode is that the collector utilizing two to rotate in opposite directions is collected into the net.Low compared with the bulking intensity of the product of this " C " shape structure has " Z " shape supporting structure double component molten and jetted material with provided by the invention, as being all 100g/m
2product, the thickness of " C " shape supporting structure product is 8mm, and the thickness of " Z " shape supporting structure product reaches 9.5mm; In the application, " C " shape supporting structure product is compared with the present invention " Z " shape supporting structure product, and its sound insulation value and thermal property are all less better for product.This and two kinds of distinct internal structures of product have direct relation.
One provided by the invention has the double component molten and jetted material of " Z " shape supporting structure, because of the internal structure that it is special, product is made to have higher bulking intensity, there is compressibility and compression resilience simultaneously, product has good sound insulation value and thermal property, sound insulation and warming field can be widely used in, and when not increasing cost, prior art products can be substituted completely.
The present invention does not state part and is applicable to prior art.
Below provide specific embodiments of the invention.Specific embodiment is only for further describing the present invention, and the claims of the present patent application is not by the restriction of specific embodiment.
Summary of the invention
For the deficiencies in the prior art, the technical problem that quasi-solution of the present invention is determined is, provides a kind of double-component melt-blown non-woven material and manufacture method thereof.The vertical section of this non-woven material has " Z " shape supporting structure, is filled with staple fibre, has higher bulkiness and excellent resistance to compression in " Z " shape support; This non-woven material manufacture method is: the mode of staple fibre by airflow blow, joins in the fiber of melt-blown direct formation, then be gathered into net by single collector by specific angle, has technique simple, and cost reduces, without the need to features such as new equipments.
The technical scheme that the present invention solves non-woven material technical problem is, design a kind of double-component melt-blown non-woven material, comprise ultra-fine meltblown fibers and staple fibre, it is characterized in that the longitudinal cross-section of the described non-woven material production mode reform had along non-woven material continues " Z " shape supporting structure extended, and should directly be formed by ultra-fine meltblown fibers by " Z " shape support, have staple fibre at the middle uniform filling of " Z " shape support, ultra-fine meltblown fibers and staple fibre rely on the Thermoadhesive of the ultra-fine meltblown fibers self of random distribution to be bonded as non-woven material entirety; The mass percent of described ultra-fine meltblown fibers in non-woven material is greater than 50%.
The technical scheme that the present invention solves described manufacture method technical problem is, design a kind of manufacture method of double-component melt-blown non-woven material, this manufacture method adopts following technique: make fibre-forming polymer cut into slices on the one hand in conventional manner and under spinnerets, produce ultra-fine meltblown fibers stream by melt-blown manufacture method; Make on the other hand the staple fibre through conventional method combing flow through airflow blow mode to converge at random and deliver among described ultra-fine meltblown fibers stream, form blended fiber stream, be then gathered into net with single collector, winding and become double-component melt-blown non-woven material product; The angle that blows of described airflow blow mode is 80-95 °.
Compared with prior art, the longitudinal plane structure of non-woven material of the present invention, because have " Z " shape support, thus possesses good bulkiness, resistance to compression and compression resilience, and application range of products is wide, is specially adapted to do heat insulating material formed.Non-woven material manufacture method of the present invention devises the collection mode specifically blowing angle He have employed single collector, the vertical section of gained non-woven material is made to possess a kind of special " Z " shape supporting structure, staple fibre uniform filling betwixt, there is design ingenious, technique is simple, cost reduces, without the need to features such as new equipments.
Accompanying drawing explanation
Fig. 1 is manufacture double-component melt-blown non-woven material technical process and the device schematic diagram of a kind of embodiment of double-component melt-blown non-woven material manufacture method of the present invention.
Fig. 2 is the close-up schematic view of angle of stream junction a in the technical process of a kind of embodiment of double-component melt-blown non-woven material manufacture method of the present invention.
Fig. 3 is the product cross section photo figure of a kind of embodiment of double-component melt-blown non-woven material of the present invention.Can know from figure and find out that this double-component melt-blown non-woven material inside has " Z " shape supporting structure.
Fig. 4 is a kind of embodiment of double-component melt-blown non-woven material of the present invention " Z " shape bracket cross section structural representation.
Fig. 5 is bondedfibre fabric " C " the shape vertical section structure schematic diagram of prior art.
Detailed description of the invention
The present invention is described further below in conjunction with embodiment.
The double-component melt-blown non-woven material of the present invention's design (is called for short non-woven material, see Fig. 3-4), this non-woven material, comprise ultra-fine meltblown fibers and staple fibre, it is characterized in that the longitudinal cross-section (the production outbound course along non-woven material) of described non-woven material has " Z " shape supporting structure continuing to extend, and should directly be formed by the ultra-fine meltblown fibers of a part by " Z " shape support, staple fibre is had at the middle uniform filling of " Z " shape support, ultra-fine meltblown fibers and staple fibre rely on the Thermoadhesive of the ultra-fine meltblown fibers of another part of random distribution self to be bonded as non-woven material entirety, the mass percent of described ultra-fine meltblown fibers in non-woven material is greater than 50%.
When the structure of non-woven material of the present invention is watched from longitudinal cross-section, fiber in non-woven material comprises two parts: a part directly forms " Z " shape supporting structure part by ultra-fine meltblown fibers (abbreviation meltblown fibers), and this " Z " shape supporting structure is along the lasting extension of production outbound course of non-woven material; Another part is the staple fibre at " Z " shape support central filler, and two kinds of fibers rely on the Thermoadhesive of the meltblown fibers self of random distribution to be bonded as non-woven material entirety.
" Z " shape of " Z " shape supporting structure described in non-woven material of the present invention refers to that the connection that the levels plane of non-woven material and middle ultra-fine meltblown fibers are formed is " Z " shape supporting structure shape, and this " Z " shape supporting structure be along non-woven material production outbound course (longitudinal direction) continuously (see Fig. 3, Fig. 4).It should be noted that: in non-woven material longitudinal plane structure of the present invention, " Z " is although shape support is directly formed by meltblown fibers, but not all meltblown fibers all forms " Z " shape support, only " Z " shape supporting structure of directly being formed of some meltblown fibers, another part meltblown fibers random distribution in non-woven material, and formed the binder fiber of meltblown fibers together with bonding short fibers (agent), make non-woven material have continuity and some strength; Equally, also only some is filled in the middle of " Z " shape support as fiberfill fibers described staple fibre, and another part fiber is then be randomly dispersed in non-woven material.
Non-woven material of the present invention has two component, and a kind of component is meltblown fibers, and another kind is staple fibre; Meltblown fibers is directly formed " Z " shape support, staple fibre is then dispersed in " Z " shape supporting structure that meltblown fibers directly formed.According to product design needs, different bulking intensity requires that the mass ratio shared by staple fibre of filling is different.If the short fiber loading in non-woven material is relatively less, then " Z " shape supporting structure characteristic obtained is lower, and the bulking intensity of product is lower; If the loading of short fiber is relatively many, the dispersing uniformity of short fiber can be relatively poor, simultaneously because the meltblown fibers of melt-blown direct formation is relatively less, then can affect the caking property between fiber, causes the non-woven material intensity of preparation lower, and not easily compress.Research shows, under regular situation, the mass percent between the fiber of staple fibre and melt-blown direct formation is easier to control and realize between 5:95 ~ 35:65; And when needing higher bulking intensity, mass percent be 35% staple fibre loading be not enough to meet the demands, can designing quality percentage be at this moment the staple fibre loading of 36-45%, to meet product demand.In described non-woven material, mass percent be 35% short fiber loading be recommend selected parameter, research shows, the mass percent loading of staple fibre is advisable to be no more than 50%.In other words, described meltblown fibers is greater than 50% in the quality accounting of non-woven material.And from manufacture angle, the fluff ratio of filling is less, then the uniformity of the non-woven material prepared more easily controls and realizes; On the contrary, the ratio of the staple fibre of filling is larger, the more difficult control of uniformity of material and realization.
The staple fibre (short fiber) mentioned in the present invention is applied widely, comprises atural staple fibre and staple fiber, can need to select any one atural staple fibre or staple fiber according to product design.The length range of described staple fibre is at 20-70mm, and fibre diameter is 1.5-10dtex.Meltblown fibers of the present invention is applicable to existing known fibre-forming polymer.
The manufacture method that the present invention devises described double-component melt-blown non-woven material simultaneously (is called for short manufacture method, see Fig. 1-2), this manufacture method adopts following technique: make fibre-forming polymer cut into slices on the one hand in conventional manner and under spinnerets, produce ultra-fine meltblown fibers stream by melt-blown manufacture method; Make on the other hand the staple fibre through conventional method combing flow through airflow blow mode to converge at random and deliver among described ultra-fine meltblown fibers stream, form blended fiber stream, be then gathered into net with single collector, winding and become double-component melt-blown non-woven material product; The angle that blows of described airflow blow mode is 80-95 °.
The specific embodiment of non-woven material manufacture method of the present invention (abbreviation manufacture method) is (see Fig. 1,2): on the one hand, staple fibre is fed into carding machine 1, staple fibre after combing is delivered in airflow blow machine 3 through Conveyance belt 2, under the blowing of air-flow, staple fibre enters in airflow blow pipeline 4, forms staple fibre stream 8; On the other hand fibre-forming polymer section is successively through feeding, melting be metered in meltblown beam 5, and the distribution through die head 5 is extruded stretching, under the cold wind effect of cool wind box 6, forms NA ultra-fine meltblown fibers stream 7; Described meltblown fibers stream 7 collaborates under cool wind box 6 exports with described staple fibre stream 8, form blended fiber stream 9, blended fiber stream 9 drops on single lapper 10, single lapper 10 relies on the negative pressure in it, blended fiber stream 9 absorptive collection on lapper, form the double component molten and jetted material 11 with longitudinal section " Z " shape supporting structure by the rotation of lapper.
By the angle a(angle of stream junction between the short fiber stream 8 that blows after combing and meltblown fibers stream 7 or blow angle described in manufacture method of the present invention, see Fig. 2) scope is at 80-95 °, described blows angle a preferably 90 °, because the characteristic of " Z " shape supporting structure now obtained is more remarkable.
First feature of manufacture method of the present invention is, described non-woven material " Z " shape supporting structure is directly formed by meltblown fibers, without the need to special equipment or device, and, with low cost, technique is simple, implements easily.
Second feature of manufacture method of the present invention is, the non-woven material with " Z " shape supporting structure uses a kind of single collector (single lapper 10) to collect.The surface of single collector is the wire netting curtain structure of porous, and the fiber directly formed and the blended fiber stream 9 of staple fibre, by the surface of negative-pressure adsorption at single collector, form continuously fibre web by the rotation of single collector.This collection mode is different from plain net collector and two collector, is one of key technology obtaining " Z " shape supporting structure and high fluffy.
3rd feature of manufacture method of the present invention is, the bicomponent fibers bonding mode with " Z " shape supporting structure non-woven material carries out at random boning by the caking property of the fiber self of melt-blown direct formation.So the mass percent shared by fiber of melt-blown direct formation, and the mixing uniformity of two kinds of component fibres, there is material impact to the intensity of the non-woven material after one-tenth net.Research shows, in non-woven material of the present invention, the fiber quality ratio of melt-blown direct formation is not less than 50% of non-woven material total quality and is advisable.
The material with " Z " shape supporting structure of manufacture method gained of the present invention, has good compressibility and compression resilience, needs and lasting bulkiness with meeting spatial.Non-woven material provided by the invention, because of the structure of its uniqueness, has good sound insulation and heat-proof quality, can be applicable to sound insulation and warming field.Form intensive air chamber not of uniform size between the fiber of material middle short fiber and melt-blown direct formation, these air chambers have the effect absorbing acoustic energy, and along with the grammes per square metre of material and the increase of thickness, absorb the corresponding raising of performance of acoustic energy.When non-woven material of the present invention is applied to heat insulating material formed field, described air chamber can play the effect of isolated heat energy equally, because of the structure of its " Z " shape support, the bulkiness of material and compression resilience are good, thus the insulation garment making to use non-woven material of the present invention to prepare or goods have superior thermal property and lasting service life.
Embodiment 1
Staple fibre adopts terylene, and fibre-forming polymer adopts polypropylene.On the one hand, terylene short fiber is fed into carding machine 1, in conventional manner after combing, is delivered in airflow blow machine 3 through Conveyance belt 2, under the blowing of air-flow, terylene short fiber enters in airflow blow pipeline 4, forms terylene short fiber stream 8; On the other hand, in conventional manner polypropylene chip through feeding, melting and be metered in meltblown beam 5, the distribution through meltblown beam 5 is extruded stretching, under the cold wind effect of cool wind box 6, forms NA polypropylene superfine meltblown fibers stream 7; Meltblown fibers stream 7 and terylene short fiber stream 8 merge together for 6 times at cool wind box, form blended fiber stream 9, blended fiber stream 9 drops on single lapper 10, utilize the negative pressure in single lapper 10 that blended fiber stream 9 is adsorbed on lapper, by the rotation of lapper, form the double component molten and jetted non-woven materials 11 with longitudinal section " Z " shape supporting structure.Wherein, mass percent between the polypropylene superfine meltblown fibers of terylene short fiber and melt-blown direct formation is 35:65, the length of terylene short fiber is 32mm, fibre fineness is 6dtex, and it is 85 ° that the angle a between the polypropylene superfine meltblown fibers of terylene short fiber and melt-blown direct formation blows angle in other words.
After testing, non-woven material product prepared by the present embodiment, square meter grammes per square metre is 300g/m
2, product thickness 25mm, the noise reduction coefficient NRC=0.45 of product, with reference to the regulation of GB/T16731-1997 " the sound absorbing capabilities classification of building sound absorption product ", material sound absorption grade is III grade, and at 120 DEG C, the sound-absorbing of 2000 hours is unchanged.
Embodiment 2
Short fiber adopts polyster fibre, and polymer adopts polypropylene.Preparation process is as embodiment 1.Percentage by weight between the polypropylene fibre of wherein terylene short fiber and melt-blown direct formation is 25:75, the length of terylene short fiber is 32mm, fibre fineness is 6dtex, and it is 90 ° that the angle a between the polypropylene fibre of terylene short fiber and melt-blown direct formation blows angle in other words.
After testing, product prepared by the present embodiment, square meter grammes per square metre is 100g/m
2, product thickness 9.5mm, the noise reduction coefficient NRC=0.25 of product, with reference to the regulation of GB/T16731-1997 " the sound absorbing capabilities classification of building sound absorption product ", material sound absorption grade is IV grade.At 120 DEG C, within 2000 hours, sound-absorbing is unchanged.
Embodiment 3
Short fiber adopts polyster fibre, and polymer adopts polypropylene.Preparation process is with embodiment 1.Percentage by weight between the polypropylene fibre of wherein terylene short fiber and melt-blown direct formation is 45:55, and the length of terylene short fiber is 32mm, and fibre fineness is 6dtex, and the angle a between the polypropylene fibre of terylene short fiber and melt-blown direct formation is 90 °.
After testing, product prepared by the present embodiment, square meter grammes per square metre is 200g/m
2, product thickness 26mm, the noise reduction coefficient NRC=0.402 of product, with reference to the regulation of GB/T16731-1997 " the sound absorbing capabilities classification of building sound absorption product ", material sound absorption grade is III grade.At 120 DEG C, within 2000 hours, sound-absorbing is unchanged.
Embodiment 4
Short fiber adopts polypropylene short fiber, and polymer adopts polypropylene.Preparation process is with embodiment 1.Percentage by weight between the polypropylene fibre of wherein polypropylene chopped fiber and melt-blown direct formation is 30:70, and the length of polypropylene chopped fiber is 32mm, and fibre fineness is 6dtex, and the angle a between the polypropylene fibre of polypropylene chopped fiber and melt-blown direct formation is 90 °.
After testing, product prepared by the present embodiment, square meter grammes per square metre is 200g/m
2, product thickness 20mm, the noise reduction coefficient NRC=0.395 of product, with reference to the regulation of GB/T16731-1997 " the sound absorbing capabilities classification of building sound absorption product ", material sound absorption grade is IV grade.At 120 DEG C, within 2000 hours, sound-absorbing is unchanged.
Claims (5)
1. a double-component melt-blown non-woven material, comprise ultra-fine meltblown fibers and staple fibre, it is characterized in that the longitudinal cross-section of described non-woven material has " Z " shape supporting structure continuing to extend, and should directly be formed by the ultra-fine meltblown fibers of a part by " Z " shape support, have staple fibre at the middle uniform filling of " Z " shape support, ultra-fine meltblown fibers and staple fibre rely on the Thermoadhesive of the ultra-fine meltblown fibers of another part of random distribution self to be bonded as non-woven material entirety; The mass percent of described ultra-fine meltblown fibers in non-woven material is greater than 50%; The length range of described staple fibre is at 32-70mm, and fibre diameter is 1.5-10dtex.
2. double-component melt-blown non-woven material according to claim 1, is characterized in that the mass percent of described staple fibre loading and ultra-fine meltblown fibers amount is designed to 5:95 ~ 45:55.
3. double-component melt-blown non-woven material according to claim 1, is characterized in that the mass percent of described staple fibre loading and ultra-fine meltblown fibers amount is designed to 35:65.
4. the double-component melt-blown non-woven material manufacture method described in any one of claim 1-3, the technique of this manufacture method is: make fibre-forming polymer cut into slices on the one hand in conventional manner and under spinnerets, produce ultra-fine meltblown fibers stream by melt-blown manufacture method; Make on the other hand the staple fibre through conventional method combing flow through airflow blow mode to converge at random and deliver among described ultra-fine meltblown fibers stream, form blended fiber stream, be then gathered into net with single collector, winding and become double-component melt-blown non-woven material product; The angle that blows of described airflow blow mode is 80-95 °.
5. double-component melt-blown non-woven material manufacture method according to claim 4, is characterized in that the described angle that blows is 90 °.
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