CN215366242U - Fine denier composite non-woven fabric - Google Patents
Fine denier composite non-woven fabric Download PDFInfo
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- CN215366242U CN215366242U CN202120942615.1U CN202120942615U CN215366242U CN 215366242 U CN215366242 U CN 215366242U CN 202120942615 U CN202120942615 U CN 202120942615U CN 215366242 U CN215366242 U CN 215366242U
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Abstract
The utility model discloses a fine denier composite non-woven fabric, which comprises an upper layer fine denier fiber net and a lower layer coarse denier fiber net, wherein the upper layer fine denier fiber net is composed of fibers with the fiber denier being less than or equal to 1.0 denier, and the lower layer coarse denier fiber net is composed of fibers with the fiber denier being 2.0-12.0 denier; the upper fine denier fiber web is composed of bicomponent parallel crimped spun-bonded long fibers, and adjacent fibers are mutually bonded into a fiber web through surface melting. Because the fine denier fiber net of upper strata produces free curling under the hot-blast effect, the stacking state that adjacent fibre is not adhered, consequently after piling up the net with the coarse denier fiber net of lower floor and consolidating into fine denier composite non-woven fabrics, the bonding point between the upper strata fibre can be less because of the fibre curls, has so both increased fine denier composite non-woven fabrics's compliance and fluffiness, has also effectively avoided fine denier fibre difficult carding, difficult processing scheduling problem.
Description
Technical Field
The utility model relates to the field of non-woven fabrics, in particular to a fine denier composite non-woven fabric applied to personal care and infant care.
Background
The non-woven fabric is used for disposable hygienic products due to the characteristics of simple production process, high yield, low cost, softness, skin friendliness and the like, and is popular with consumers. The fiber denier of the formed non-woven fabric has great influence on the performance of the non-woven fabric, the smaller the fiber denier is, the smaller the fiber diameter is, and the more exquisite and smooth the hand feeling of the formed non-woven fabric is; and the larger the fiber denier, the larger the fiber diameter, the more pores of the formed non-woven fabric are, which is beneficial to air permeability and liquid absorption, and the bulkier the non-woven fabric is. In the disposable sanitary product, because the non-woven fabric can be directly contacted with the skin of a user, the requirements on the softness, smoothness and skin-friendliness of the non-woven fabric are high, the non-woven fabric is usually selected from fibers with the fiber denier of 1.5-3.0 denier, and the fiber denier of less than or equal to 1.0 denier, although the formed non-woven fabric is softer and has finer hand feeling, the problems that the fibers are difficult to comb during production, the net surface of the formed non-woven fabric is uneven and the like exist because the fibers are very thin.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a fine denier composite non-woven fabric with delicate and soft hand feeling, which overcomes the defects of the existing product and the production method.
In order to achieve the above purpose, the solution of the utility model is:
the fine denier composite non-woven fabric comprises an upper layer fine denier fiber net and a lower layer coarse denier fiber net, wherein the upper layer fine denier fiber net is composed of fibers with the fiber denier being less than or equal to 1.0 denier, and the lower layer coarse denier fiber net is composed of fibers with the fiber denier being 2.0-12.0 denier; the upper fine denier fiber net is composed of two-component parallel-crimping spun-bonded long fibers, adjacent two-component parallel-crimping spun-bonded long fibers are mutually adhered through surface melting, the two-component parallel-crimping spun-bonded long fibers are composed of high-melting-point resin and low-melting-point resin, the melting points of the high-melting-point resin and the low-melting-point resin are different by more than 20 ℃, and the high-melting-point resin and the low-melting-point resin have different shrinkage stresses; the gram weight of the lower layer coarse denier fiber web is 5-10 g/m2。
The fiber denier of the upper layer fine denier fiber net is 0.6-1.0 denier.
The lower layer coarse denier fiber net is a fiber net without adhesion among fibers or a non-woven fabric with adhesion among fibers.
After the scheme is adopted, the fine denier fiber net on the upper layer of the fine denier composite non-woven fabric consists of double-component parallel crimped spun-bonded long fibers, because two thermoplastic resins have different contractive forces, the fibers are freely crimped under the action of hot air at 100-110 ℃ in a stacked state without adhesion of adjacent fibers, then the low-melting-point resin in a heating device starts to melt and is bonded with the adjacent fibers to form the upper fine denier fiber net, therefore, after the fine denier composite non-woven fabric is consolidated with the lower coarse denier fiber net stacked net, bonding points among the upper layer fibers are fewer due to fiber crimping, the softness and the fluffiness of the fine denier composite non-woven fabric are increased, the problems that the fine denier fibers are difficult to comb and difficult to process and the like are effectively avoided, and the double-component parallel crimped long fibers are thinner, so that the formed upper fine denier fiber net has fine denier fiber feeling and is fine, smooth and more skin-friendly; simultaneously, the compound heavy denier fibre web of lower floor can increase the mechanical properties of fine denier composite non-woven fabrics, even also can have better tensile strength under the low grammes per square metre condition, the fibre denier of lower floor's fibre web is thick moreover, is favorable to the water conservancy diversion infiltration of liquid, and the coarse fibre can improve the fluffiness of composite non-woven fabrics and the resilience of thickness direction simultaneously to the travelling comfort in the use has been increased.
Drawings
Fig. 1 is a cross-sectional view of a fine denier composite nonwoven fabric of example 1 of the present invention;
FIG. 2 is a cross-sectional view of a bicomponent side-by-side crimped spunbond filament of the present invention;
FIG. 3 is a schematic view of the production of a fine denier composite nonwoven fabric of example 1 of the present invention;
FIG. 4 is a cross-sectional view of a fine denier composite nonwoven fabric of example 2 of the present invention;
fig. 5 is a schematic view of the production of a fine denier composite nonwoven fabric of example 2 of the present invention.
Description of the symbols
1 (2) fine denier composite non-woven fabric
11 bicomponent side-by-side crimped spunbond filaments 11a high melting point resin 11b low melting point resin
a1 (a 2) upper fine denier web b1 (b 2) lower coarse denier web.
Example 1:
a1, A1' hot melt extrusion device
B1 spinning device C1 spinneret D1 side blowing cold air E1 drafting device
F1 upper layer fine denier fiber curling procedure hot air oven G1 guide roller
Hot air oven in H1 forming procedure
I1A pair of heated pressure rollers
d1 coarse bicomponent side-by-side spun-bonded long fiber
E1 bicomponent side-by-side spun-bonded long fiber
f1 Upper Fine non-blocking web.
Example 2:
a2, A2' hot melt extrusion device
B2 spinning device C2 spinneret D2 side blowing cold air E2 drafting device
Hot air oven in F2 upper layer fine denier fiber curling procedure
Hot air oven in H2 forming procedure
I2 bale breaking opener G2 carding machine
d2 coarse bicomponent side-by-side spun-bonded long fiber
E2 bicomponent side-by-side spun-bonded long fiber
f2 Upper Fine non-blocking web.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.
The utility model discloses a fine denier composite non-woven fabric 1 (2) which comprises an upper fine denier fiber web a1 (a 2) consisting of fibers with the fiber denier less than or equal to 1.0 denier and a lower coarse denier fiber web b1 (b 2) consisting of fibers with the fiber denier of 2.0-12.0 denier, wherein the upper fine denier fiber web a is shown in figures 1, 2 and 4; the upper fine fiber web a1 (a 2) is composed of two-component side-by-side crimped spunbond long fibers 11, and adjacent fibers are bonded to each other by surface melting, and the two-component side-by-side crimped spunbond long fibers 11 have a difference in melting pointA high melting point resin 11a and a low melting point resin 11b at 20 ℃ or higher, the high melting point resin 11a and the low melting point resin 11b having different shrinkage stresses; the gram weight of the lower layer coarse denier fiber web b1 (b 2) is 5-10 g/m2。
The fiber web of the lower layer coarse denier fiber web b1 (b 2) is an unbonded fiber web or a non-woven fabric with bonding among fibers.
Example 1
As shown in fig. 3 and fig. 1 and 2, the fine denier composite nonwoven fabric of the present invention is manufactured by the following method:
(1) an upper layer fine fiber supply process: adopting a spun-bonding process, respectively heating two thermoplastic resins, namely high-density polyethylene (HDPE) and polypropylene (PP), with the melting point difference of more than or equal to 20 ℃, through hot-melting extrusion devices A1 and A1', melting the two thermoplastic resins, then feeding the melted thermoplastic resins into a spinning device B1, changing high-temperature melt into melt trickle in a spinning device B1, and then ejecting the melt trickle through two-component parallel spinneret holes on a spinneret plate C1 to form coarse two-component parallel spun-bonded long fiber d 1; cooling by side-blown cold air D1, and forming the bicomponent side-by-side spun-bonded long fiber E1 with the fiber denier of 1.0 through a drafting device E1;
(2) and (3) curling the fine denier fiber of the upper layer: the two-component parallel spun-bonded long fiber e1 is laid into a fiber net, then enters a hot air oven F1, and under the action of hot air at the temperature of 100-110 ℃, the two-component parallel spun-bonded long fiber e1 starts to curl due to different shrinkage stresses of high-melting-point resin polypropylene (PP) and low-melting-point resin high-density polyethylene (HDPE), so that two-component parallel spun-bonded long fiber e1 is formed into two-component parallel curled spun-bonded long fiber 11, and then an upper fine-denier non-adhesive fiber net F1 is formed;
(3) a lower layer coarse denier fiber web supply procedure: conveying the lower layer coarse denier fiber web b1 to the outlet of the upper layer fine denier fiber crimping process through a guide roller G1, wherein b1 is coarse denier non-woven fabric with adhesion among fibers, and the fiber denier is 4 denier;
(4) a net stacking procedure: the upper fine denier unbonded web f1 is overlapped with the lower coarse denier web b1 at the outlet of the upper fine denier fiber crimping process to form an overlapped composite web surface with the upper fine denier unbonded web f1 and the lower coarse denier web b 1;
(5) a molding procedure: and (2) passing the overlapped composite web surface through a hot air oven H1, so that the upper fine-denier non-bonded fiber web f1 starts to melt and adjacent fibers start to be bonded through the action of hot air, the lower-melting-point resin of the surface layer starts to melt, the adjacent fibers start to be bonded, the upper fine-denier fiber web a1 is formed, and then the upper fine-denier fiber web a1 and the lower coarse-denier fiber web b1 are consolidated together through a pair of heated press rolls I1, wherein the temperature of the hot air oven H1 is 130 ℃, the temperature of the heated press roll I1 is 125 ℃, and then rolling is carried out, so that the fine-denier composite non-woven fabric 1 is formed.
After the scheme is adopted, the fine denier fiber web a1 on the upper layer of the fine denier composite non-woven fabric 1 of the embodiment is composed of the double-component parallel-crimping spun-bonded long fibers 11, because the high density polyethylene HDPE and the polypropylene PP have different shrinkage forces, the fibers are free-crimped under the action of hot air at 100-110 ℃ in a stacked state that adjacent fibers are not bonded, then the low-melting-point resin starts to melt under the action of hot air at 130 ℃ and is bonded with the adjacent fibers to form the upper fine denier fiber web a1, the fiber crimping formed in this way is not affected by the consolidation of the adjacent fibers, the crimping degree is higher, after the upper layer of the fine denier fiber web b1 is consolidated into the fine denier composite non-woven fabric, the bonding points between the upper layer of the fine denier composite non-woven fabric are reduced due to the fiber crimping, so that the softness and fluffiness of the fine denier composite non-woven fabric are increased, and the fine denier fiber is effectively avoided, the double-component parallel crimped spun-bonded long fiber is thinner, and the formed upper layer fine denier fiber net has fine and smooth hand feeling and is more skin-friendly. Meanwhile, the lower-layer composite coarse-denier fiber net can increase the mechanical property of the fine-denier composite non-woven fabric, and the fine-denier composite non-woven fabric can have better tensile strength even under the condition of low gram weight.
Example 2
As shown in fig. 4 and 5, the fine denier composite non-woven fabric of the utility model adopts the following manufacturing method:
(1) an upper layer fine fiber supply process: adopting a spun-bonded process, respectively heating two thermoplastic resin polypropylene PP and low-melting-point polyethylene terephthalate PET with the melting point difference of more than or equal to 20 ℃ by hot-melting extrusion devices A2 and A2', melting the two thermoplastic resin polypropylene PP and the low-melting-point polyethylene terephthalate PET, then feeding the two thermoplastic resin polypropylene PP and the low-melting-point polyethylene terephthalate PET into a spinning device B2, changing high-temperature melt into melt trickle in a spinning device B2, and then spraying the melt trickle through two-component parallel spinneret orifices on a spinneret plate C2 to form coarse two-component parallel spun-bonded long fibers d 2; cooling by side-blown cold air D2, and forming bicomponent side-by-side spun-bonded long fiber E2 with the fiber denier of 0.8 through a drafting device E2;
(2) and (3) curling the fine denier fiber of the upper layer: the two-component parallel spun-bonded long fiber e2 is laid into a fiber net, then enters a hot air oven F2, and under the action of hot air at the temperature of 100-110 ℃, the two-component parallel spun-bonded long fiber e2 starts to curl due to different shrinkage stresses of high-melting-point resin polypropylene (PP) and low-melting-point polyethylene terephthalate (PET), so that two-component parallel spun-bonded long fiber e2 starts to curl to form two-component parallel curled spun-bonded long fiber 11, and further an upper-layer fine-denier non-adhesive fiber net F2 is formed;
(3) a lower layer coarse denier fiber web supply procedure: opening the 6 denier PE/PET fibers by an opener I2 in a lower layer coarse denier fiber web b2, carding the fibers into a fiber web b2 by a carding machine G2, and conveying the fiber web b2 to the outlet of an upper layer fine denier fiber crimping process, wherein b2 is the coarse denier fiber web without adhesion among the fibers, and the fiber denier is 6 denier;
(4) a net stacking procedure: the upper fine denier unbonded web f2 is overlapped with the lower coarse denier web b2 at the outlet of the upper fine denier fiber crimping process to form an overlapped composite web surface with the upper fine denier unbonded web f2 and the lower coarse denier web b 2;
(5) a molding procedure: the overlapped composite web surface passes through a hot air oven H2, so that the upper fine denier non-bonded fiber web f2 starts to melt and adjacent fibers start to be bonded through the action of hot air, the lower melting point resin of the surface layer starts to melt, the adjacent fibers start to be bonded, the upper fine denier fiber web a2 is formed, the PE low melting point resin of the surface layer of the lower coarse denier fiber web b2 also starts to melt and is bonded with the adjacent fibers, and the upper fine denier fiber web a2 and the lower coarse denier fiber web b2 are also bonded together, wherein the temperature of the hot air oven H2 is 135 ℃, and then the fine denier composite non-woven fabric 2 is formed in a rolling mode.
After adopting above-mentioned scheme, because lower floor's coarse denier fiber web b2 is on-line production, not through the rolling, reduced rolling and unwinding equipment, still reduced midway transportation stage, thereby reduced manufacturing cost, reduce the transportation pollution risk, and form the fiber web that only is not the adhesion between the fibre, consequently the fluffiness of lower floor's coarse denier fiber web b2 is better than the non-woven fabrics after the off-line unreels, the fluffiness of the fine denier composite non-woven fabrics 2 that obtains after compounding with upper fine denier fiber web a2 is better. Alternatively, the in-line produced lower macro-denier web b2 may be a spunbond web, or a meltblown web, or the like.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the utility model, which is defined by the appended claims.
Claims (3)
1. A fine denier composite non-woven fabric is characterized in that: the fine denier composite non-woven fabric comprises an upper layer fine denier fiber net consisting of fibers with the fiber denier of less than or equal to 1.0 denier and a lower layer coarse denier fiber net consisting of fibers with the fiber denier of 2.0-12.0 denier; the upper fine denier fiber net is composed of two-component parallel-crimping spun-bonded long fibers, adjacent two-component parallel-crimping spun-bonded long fibers are mutually adhered through surface melting, the two-component parallel-crimping spun-bonded long fibers are composed of high-melting-point resin and low-melting-point resin, the melting points of the high-melting-point resin and the low-melting-point resin are different by more than 20 ℃, and the high-melting-point resin and the low-melting-point resin have different shrinkage stresses; the gram weight of the lower layer coarse denier fiber web is 5-10 g/m2。
2. The fine denier composite nonwoven fabric of claim 1, wherein: the fiber denier of the upper layer fine denier fiber net is 0.6-1.0 denier.
3. The fine denier composite nonwoven fabric of claim 1, wherein: the lower layer coarse denier fiber net is a fiber net without adhesion among fibers or a non-woven fabric with adhesion among fibers.
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| CN202120942615.1U CN215366242U (en) | 2021-04-30 | 2021-04-30 | Fine denier composite non-woven fabric |
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| CN202120942615.1U CN215366242U (en) | 2021-04-30 | 2021-04-30 | Fine denier composite non-woven fabric |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022227749A1 (en) * | 2021-04-30 | 2022-11-03 | 厦门延江新材料股份有限公司 | Fine-denier composite non-woven fabric and fabrication method therefor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022227749A1 (en) * | 2021-04-30 | 2022-11-03 | 厦门延江新材料股份有限公司 | Fine-denier composite non-woven fabric and fabrication method therefor |
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