CN113558866A - Breathable elastic composite non-woven fabric and manufacturing method thereof - Google Patents

Breathable elastic composite non-woven fabric and manufacturing method thereof Download PDF

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Publication number
CN113558866A
CN113558866A CN202110650477.4A CN202110650477A CN113558866A CN 113558866 A CN113558866 A CN 113558866A CN 202110650477 A CN202110650477 A CN 202110650477A CN 113558866 A CN113558866 A CN 113558866A
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elastic
woven fabric
nonwoven fabric
breathable
elastic film
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肖德全
李世煌
蔡吉祥
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Xiamen Yanjan New Material Co Ltd
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Xiamen Yanjan New Material Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/56—Supporting or fastening means
    • A61F13/64—Straps, belts, ties or endless bands

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Epidemiology (AREA)
  • Manufacturing & Machinery (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a breathable elastic composite non-woven fabric, which consists of a surface layer non-woven fabric, a middle layer elastic film and a bottom layer non-woven fabric, wherein the surface layer non-woven fabric and the bottom layer non-woven fabric are respectively provided with a plurality of strip-shaped convex areas and concave areas which are transversely arranged, the middle layer elastic film is provided with funnel-shaped openings, strip-shaped breathable channels are formed between the convex areas by the surface layer non-woven fabric and the bottom layer non-woven fabric, internal damp and hot air can permeate into the breathable channel space formed by the bottom layer non-woven fabric and the elastic film when being worn, the damp and hot air rapidly diffuses in the length direction and the height direction of the breathable channel space in the breathable channel and enters the breathable channel space formed by the elastic film and the surface layer non-woven fabric through the openings of the elastic film, and then the elastic composite non-woven fabric is discharged, thereby achieving the effect of rapid heat conduction and moisture removal.

Description

Breathable elastic composite non-woven fabric and manufacturing method thereof
Technical Field
The invention relates to the field of non-woven fabrics, in particular to a breathable elastic composite non-woven fabric applied to absorbent products and personal care products and a manufacturing method thereof.
Background
The elastic composite non-woven fabric or the elastic non-woven fabric has the characteristics of soft texture, environmental protection, no toxicity, ventilation and natural bacteriostasis, and is widely applied to elastic bandages, waistlines of adult incontinence pants of baby diapers and the like. Especially when applied to the elastic waistline of the paper diaper, the elastic waistline has moderate elasticity, does not loosen or tighten the skin, and the non-woven fabric in contact with the skin is soft and comfortable.
The existing elastic composite non-woven fabric mainly comprises a surface layer or a bottom layer non-woven fabric, and an elastic film is arranged in the middle layer. The middle elastic film has poor air permeability, and when the elastic diaper waistline is worn, hot air in the waistline is difficult to be discharged to the outside of the waistline, so that a wearer feels sultry and is not breathable, bacteria are easy to breed, and skin allergy is caused.
Disclosure of Invention
The invention aims to provide a soft and breathable elastic composite non-woven fabric and a manufacturing method thereof, and overcomes the defects of the existing product and the existing production method.
In order to achieve the above purpose, the solution of the invention is:
the utility model provides a ventilative elasticity composite nonwoven fabric, ventilative elasticity composite nonwoven fabric constitute by superficial layer nonwoven fabric, intermediate level elastic film and bottom nonwoven fabric, all have many strip type protruding region and the concave region of transverse arrangement on superficial layer nonwoven fabric and the bottom nonwoven fabric, funnel-shaped trompil has on the intermediate level elastic film, the concave region of superficial layer nonwoven fabric and bottom nonwoven fabric is compound respectively on top and the bottom of the funnel-shaped trompil of intermediate level elastic film locates on the surface, and the one-to-one correspondence about the composite position, superficial layer nonwoven fabric and bottom nonwoven fabric form strip type ventilation channel between protruding region, strip type ventilation channel contain the ventilation channel space that superficial layer nonwoven fabric and intermediate level elastic film formed and the ventilation channel space that bottom nonwoven fabric and intermediate level elastic film formed, wherein: the distance between the adjacent strip-shaped concave areas is 2mm-10mm, and the funnel-shaped open pore density on the middle layer elastic film is 20-1600/cm2The area of the top surface of a single opening is 0.03mm2～2.5mm2。
Preferably, the non-woven fabrics of the surface layer and the bottom layer are hot air non-woven fabrics, spun-bonded non-woven fabrics, spunlace non-woven fabrics or melt-blown non-woven fabrics.
Preferably, the elastic film of the intermediate layer contains a thermoplastic elastic resin, and the thermoplastic elastic resin is a thermoplastic polystyrene elastomer, a thermoplastic polyolefin elastomer or a thermoplastic polyurethane elastomer.
Preferably, the surface layer nonwoven fabric further has an open pore structure thereon.
Preferably, the bottom layer non-woven fabric is also provided with an open pore structure.
Preferably, the spacing between adjacent recessed regions of the strip is 3mm to 8 mm.
Preferably, said single strip of raised or recessed areas is continuous or intermittent.
The invention also provides a manufacturing method of the breathable elastic composite non-woven fabric, which comprises the following specific steps:
(1) in the elastic film opening process, thermoplastic elastic resin is melted and extruded by a screw extruder to form an elastic cast film; elasticity curtain coating membrane gets into vacuum trompil device, vacuum trompil device by the vacuum pump, the forming drum that links to each other with the vacuum pump and be located the forming cylinder mould outside and constitute, work as when elasticity film gets into the vacuum suction mouth department at vacuum trompil device, because of inside and outside pressure differential's effect, forms a plurality of infundibulate trompils in the surface, forms the elasticity film that has the infundibulate trompil, wherein: the shape of the funnel-shaped opening is consistent with that of the hole on the forming mesh cage positioned outside the forming drum;
(2) in the elastic film transverse stretching process, after the elastic film with the funnel-shaped opening enters a transverse stretching device consisting of a plurality of groups of clamps positioned at two sides of the elastic film, the two sides are clamped by the plurality of groups of clamps, the transverse width is gradually increased, and the elastic film is gradually stretched to 200-300% of the original transverse width from an unstretched state;
(3) the compounding process is that the surface layer non-woven fabric and the bottom layer non-woven fabric enter a compounding device from the upper surface and the lower surface of the elastic film with the funnel-shaped opening in the stretching state respectively, and are compounded together with the elastic film with the funnel-shaped opening in the stretching state through hot-pressing compounding to form the elastic compound non-woven fabric in the stretching state, wherein: the concave areas of the surface layer non-woven fabric and the bottom layer non-woven fabric are respectively compounded on the surfaces of the top and the bottom of the funnel-shaped opening of the middle layer elastic film, and the compounding positions are in one-to-one correspondence;
(4) the shrinkage molding process loosens a plurality of groups of clamps on two sides of the elastic composite non-woven fabric in the stretching state to ensure that the width of the elastic composite non-woven fabric is shrunk to be in the unstretched state, a plurality of strip-shaped convex areas and concave areas which are transversely arranged are formed on the surface layer non-woven fabric and the bottom layer non-woven fabric, the elastic composite non-woven fabric with funnel-shaped holes is arranged on the middle layer elastic film, and then the edges are cut and the elastic composite non-woven fabric is rolled.
Preferably, the compounding device in the step (3) is composed of a pair of smooth rollers; surface layer non-woven fabrics and bottom non-woven fabrics spout the mucilage binding and put through the fixed point respectively earlier and spout gluey, then get into among the composite set, through hot pressing complex, with the elastic film who is in tensile state and has funnel-shaped trompil spouts gluey position hot pressing position complex at the fixed point and is in the same place, forms the elastic composite non-woven fabrics that is in tensile state.
Preferably, the distance between adjacent glue spraying openings in the fixed-point glue spraying device in the step (3) is 4mm-30 mm.
Preferably, the distance between adjacent glue spraying openings in the fixed-point glue spraying device in the step (3) is 6mm-24 mm.
Preferably, the compounding device in the step (3) is composed of a pair of convex rollers and smooth rollers, the surface layer non-woven fabric and the bottom layer non-woven fabric respectively enter the compounding device, and are compounded with the elastic film with funnel-shaped openings in the stretching state at the hot pressing position of the convex rollers through hot pressing to form the elastic compound non-woven fabric in the stretching state.
Preferably, the convex roller of the compounding device in the step (3) is provided with a plurality of continuous or discontinuous annular bulges distributed along the axial direction.
Preferably, the distance between adjacent annular protrusions axially distributed on the convex roller of the compounding device in the step (3) is 4mm-30 mm.
Preferably, the distance between the annular bulges distributed along the axial direction on the convex roller of the compounding device in the step (3) is 6mm-24 mm.
Preferably, the surface layer non-woven fabric and the bottom layer non-woven fabric are respectively sprayed with glue by a fixed-point glue spraying device before entering a composite device consisting of a pair of convex rollers and smooth rollers.
Preferably, the distance between adjacent glue spraying openings of the fixed-point glue spraying device is consistent with the distance between adjacent annular bulges which are axially distributed on the convex roller.
Preferably, the surface layer nonwoven fabric in the step (3) is subjected to a perforation process in a perforation device comprising a pair of needle rollers and a pair of concave rollers before entering the compounding device.
Preferably, the non-woven fabric of the bottom layer in the step (3) enters a punching device consisting of a pair of needle rollers and a pair of concave rollers for punching before entering the compounding device.
After the scheme is adopted, the middle layer of the elastic composite non-woven fabric is the elastic film with the funnel-shaped opening, the surface layer and the bottom layer of the non-woven fabric are provided with the plurality of strip-shaped convex areas and the plurality of strip-shaped concave areas which are transversely arranged, the elasticity of the elastic film with the funnel-shaped opening is moderate, so that people feel no bound feeling, no pressing feeling and no relaxation feeling, the pain caused by pressing blood vessels and nerves of a human body due to poor elasticity is effectively prevented, and the wearing comfort is improved; the existence of the open pores greatly increases the air permeability of the elastic composite non-woven fabric, the continuous strip-shaped air permeable channel formed between the raised areas by the surface layer non-woven fabric and the bottom layer non-woven fabric can permeate the internal hot and humid air to the air permeable channel space formed by the bottom layer non-woven fabric and the elastic film when being worn, the hot and humid air can rapidly diffuse in the air permeable channel in the length direction and the height direction of the air permeable channel space, enters the air permeable channel space formed by the elastic film and the surface layer non-woven fabric through the open pores of the elastic film, and then is discharged out of the elastic composite non-woven fabric, thereby achieving the effects of rapid heat conduction and moisture removal; the funnel-shaped elastic film is formed by the vacuum hole forming device, the holes are uniformly formed, the edges of the holes are neat, and stress concentration is not easy to generate, so that the risk of tearing the elastic film in the stretching process is greatly reduced; meanwhile, the non-woven fabrics of the surface layer and the bottom layer are soft to touch and are skin-friendly and breathable when being in contact with the skin, and symptoms such as erythema and allergy caused by long-time contact with the skin can not be caused.
Drawings
FIG. 1 is a schematic view of a breathable elastic composite nonwoven fabric according to example 1 of the present invention;
FIG. 2 is a cross-sectional view of a breathable elastic composite nonwoven fabric according to example 1 of the present invention;
FIG. 3 is a schematic view of a stretching apparatus according to the present invention;
FIG. 4 is a schematic view showing the production of a breathable elastic composite nonwoven fabric according to example 1 of the present invention;
FIG. 5 is a schematic view of a breathable elastic composite nonwoven fabric according to example 2 of the present invention;
FIG. 6 is a cross-sectional view of a breathable elastic composite nonwoven fabric according to example 2 of the present invention;
FIG. 7 is a schematic view showing the production of a breathable elastic composite nonwoven fabric according to example 2 of the present invention;
FIG. 8 is a schematic view of a breathable elastic composite nonwoven fabric according to example 3 of the present invention;
FIG. 9 is a cross-sectional view of a breathable elastic composite nonwoven fabric according to example 3 of the present invention;
fig. 10 is a schematic view showing the production of the breathable elastic composite nonwoven fabric according to example 3 of the present invention.
Description of the symbols
Example 1:
41 elastic nonwoven fabric
11 surface layer non-woven fabric 21 bottom layer non-woven fabric
31 elastic film
a1, b1 convex region c1, d1 concave region
e1 funnel-shaped opening
x1 air-permeable passage space formed by the surface layer nonwoven fabric 11 and the middle layer elastic film 31
y1 air-permeable passage space formed by the bottom layer non-woven fabric 21 and the middle layer elastic film 31
A1 screw extruder B1 building drum
C1 mould net cage D1 vacuum suction mouth
E1 transverse stretching device F1 clamp
G1, G1' fixed point glue spraying device H1 compound device
Example 2:
42 elastic nonwoven fabric
12 surface layer non-woven fabric, 22 bottom layer non-woven fabric
32 elastic film
a2, b2 convex region c2, d2 concave region
e2 opening structure on funnel-shaped opening f2 surface layer nonwoven
The x2 air-permeable passage space formed by the non-woven fabric 12 on the surface layer and the elastic film 32 on the middle layer
y1 air permeable passage space formed by the bottom layer non-woven fabric 22 and the middle layer elastic film 32
A2 screw extruder B2 building drum
C2 mould net cage D2 vacuum suction mouth
E2 transverse stretching device F2 clamp
H2 compound device J2 needle roller
Convex roller in I2 concave roller K2 composite device
Projections on smooth roller M2 convex roller in L2 composite device
Example 3:
43 elastic nonwoven fabric
13 surface layer non-woven fabric 23 bottom layer non-woven fabric
33 elastic film
a3, b3 convex region c3, d3 concave region
e3 opening structure on funnel-shaped opening f3 surface layer nonwoven
g3 apertured structure on bottom layer nonwoven fabric
x3 air-permeable passage space formed by the surface layer nonwoven 13 and the middle layer elastic film 33
y3 air-permeable passage space formed by the bottom layer non-woven fabric 23 and the middle layer elastic film 33
A3 screw extruder B3 building drum
C3 mould net cage D3 vacuum suction mouth
E3 transverse stretching device F3 clamp
G3, G3' fixed point glue spraying device
H3 composite device J3, N3 needle roller
I3, O3 concave roller
Convex roller in K3 composite device
The projections on the smooth roller M3 male roller in the L3 composite device.
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.
As shown in FIG. 1 and FIG. 2, the present invention discloses a breathable elastic composite nonwoven fabric 41, wherein the breathable elastic composite nonwoven fabric 41 is composed of a surface layer nonwoven fabric 11, a middle layer elastic film 31 and a bottom layer nonwoven fabric 21, the surface layer nonwoven fabric 11 and the bottom layer nonwoven fabric 21 are respectively provided with a plurality of stripe-shaped raised areas a1, b1 and recessed areas c1, d1 which are transversely arranged, the middle layer elastic film 31 is provided with a funnel-shaped opening e1, the recessed areas c1, d1 of the surface layer nonwoven fabric 11 and the bottom layer nonwoven fabric 21 are respectively compounded on the surface of the top and the bottom of the funnel-shaped opening of the middle layer elastic film 31, and the compounding positions are up and down one-to-one corresponding, the surface layer non-woven fabric 11 and the bottom layer non-woven fabric 21 form a strip-shaped ventilation channel between the raised areas a1 and b1, the strip-shaped air-permeable passage comprises an air-permeable passage space x1 formed by the surface layer non-woven fabric 11 and the middle layer elastic film 31, and the bottom layer non-woven fabric 21 and the middle layer elastic film 3.1, a gas-permeable passage space y1, wherein: the spacing between the concave regions of the adjacent strips is 5mm, and the density of the funnel-shaped openings in the elastic film 31 of the intermediate layer is 100/cm2The area of the top surface of a single opening is 0.45mm2。
As shown in fig. 3, after the elastic film 31(32, 33) of the middle layer is put into a transverse stretching device E1(E2, E3) composed of a plurality of sets of clamps F1(F2, F3) positioned at both sides of the elastic film, both sides are clamped by a plurality of sets of clamps F1(F2, F3), the transverse width is gradually increased, the elastic film is gradually stretched by a non-stretched state width L0, the stretched width L1 is 200% -300% of the original transverse non-stretched width L0, and is compounded with the surface layer non-woven fabric and the bottom layer non-woven fabric by a compounding device H1(H2, H3) when the width L1 is stretched, and then a plurality of sets of clamps F1(F2, F3) positioned at both sides of the elastic compound non-woven fabric of the stretched state width L1 are loosened to make the width of the elastic compound non-woven fabric shrunk into a non-stretched state width L0.
Tensile strength at definite elongation at deformation of 25%, 50% and 100%,
testing an instrument: an XLW (EC) Intelligent electronic tensile tester,
test samples: 5 elastic composite non-woven fabrics with the thickness of 25.4mm multiplied by 150mm,
the testing steps are as follows: the distance between the clamps of the tester is adjusted to 50mm, and the sample is fixed between the two clamps to be flat and not stretched. After clicking the option of 'definite tensile strength', the clamp at the upper end of the testing machine stretches the sample at a stretching speed of 500mm/min, and the tensile strength values at 25%, 50% and 100% of stretching deformation are recorded.
A non-recoverable deformation test at 50% deformation,
testing an instrument: an XLW (EC) Intelligent electronic tensile tester,
test samples: 5 elastic composite non-woven fabrics with the thickness of 25.4mm multiplied by 150mm,
the testing steps are as follows: the distance between the clamps of the tester is adjusted to 50mm, and the sample is fixed between the two clamps to be flat and not stretched. The clamp at the upper end of the testing machine stretches the sample at a stretching speed of 500mm/min, when the sample is stretched to 50% of the clamping length of the sample, the sample is kept at a constant force for 1min, and the sample is immediately returned to a zero position at the same speed and stays for 1 min; and then, stretching for the second time at the same stretching speed, staying for 1min when the sample is stretched to 25 percent of the clamping length of the sample, and then returning to the zero position at the same speed. The displacement value on the tension versus displacement curve at the start of tension at the second start of tension is measured.
Results calculation and presentation:
the sample does not recover deformation at 50% deformation:
Figure BDA0003110808370000101
where M1-length of specimen grip, mm;
m2 — displacement value, mm, of the specimen on the pull force vs displacement curve at the start of the second pull force.
The air permeability of the composite material is good,
testing an instrument: FX3300-IV air permeability tester,
test samples: 5 strips of 10cm multiplied by 10cm elastic composite non-woven fabric,
the testing steps are as follows: the test samples were placed in a laboratory at ambient room temperature (23 + -2) ° c and relative humidity (50 + -2)% for at least two hours. The upper area of the air permeability tester is 38cm2The upper test head is provided with a clamping arm and a high-pressure rubber pipe is connected with the upper test head, and 38cm is connected with the upper test head2The lower test head is fixed in the sample diameter fixed value ring and connects the high-pressure rubber tube with the lower test head. Setting the experimental conditions: the unit is selected as: m is3/m2Min test pressure: 125 Pa. The front of the sample is placed on the lower testing head, the clamping arm is pressed down to start testing, and when the correct testing range indicating lamp is stable and is displayed as green, the reading can be recorded.
Example 1
As shown in fig. 4 in combination with fig. 1, 2 and 3, the breathable elastic composite nonwoven fabric according to example 1 of the present invention is produced by the following method:
(1) in the elastic film opening process, a Thermoplastic Polyurethane (TPU) is subjected to melt extrusion through a screw extruder A1 to form an elastic casting film; the elastic casting film enters a vacuum tapping device, the vacuum tapping device consists of a vacuum pump (not shown in the figure), a forming drum B1 connected with the vacuum pump and a forming net cage C1 positioned outside the forming drum, when the elastic film enters a vacuum suction port D1 of the vacuum tapping device, a plurality of funnel-shaped tapping e1 are formed on the surface under the action of internal and external pressure difference, and the elastic film 31 with the funnel-shaped tapping e1 is formed, wherein: the shape of the funnel-shaped opening e1 corresponds to the shape of the holes in the forming cylinder mould C1 located outside the forming drum B1;
(2) in the elastic film transverse stretching process, after the elastic film 31 with the funnel-shaped opening E1 enters a transverse stretching device E1 consisting of a plurality of groups of clamps F1 positioned at two sides of the elastic film 31, the two sides are clamped by a plurality of groups of clamps F1, the transverse width is gradually increased, and the elastic film is gradually stretched to 200% of the original transverse width from an unstretched state;
(3) after the glue spraying devices G1 and G1' spray glue on the surface layer non-woven fabric 11 and the bottom layer non-woven fabric 21 respectively at fixed points, the non-woven fabric and the bottom layer non-woven fabric enter a compounding device H1 consisting of a pair of smooth rollers respectively from the upper surface and the lower surface of an elastic film 31 with a funnel-shaped opening e1 in a stretching state, and the non-woven fabric and the elastic film 31 with the funnel-shaped opening e1 in the stretching state are compounded together at the position where the glue is sprayed at the fixed points through hot-pressing compounding to form an elastic compound non-woven fabric 41 in the stretching state, wherein: the recessed regions c1, d1 of the surface layer nonwoven fabric 11 and the bottom layer nonwoven fabric 21 are respectively compounded on the surface of the funnel-shaped opening e1 of the middle layer elastic film 31, and the compounding positions are up and down one-to-one corresponding to each other, wherein: the surface layer non-woven fabric 11 and the bottom layer non-woven fabric 21 can be one or two of a hot air non-woven fabric, a spun-bonded non-woven fabric, a spunlace non-woven fabric or a melt-blown non-woven fabric, and the distance between adjacent glue spraying openings in the fixed-point glue spraying devices G1 and G1' is 10 mm;
(4) the contraction molding process releases the plurality of sets of clamps F1 on both sides of the stretched elastic composite nonwoven fabric 41 to contract the width of the elastic composite nonwoven fabric 41 to an unstretched state, thereby forming the elastic composite nonwoven fabric 41 having the transversely arranged strip-shaped convex regions a1, b1 and concave regions c1, d1 on both the surface layer nonwoven fabric 11 and the bottom layer nonwoven fabric 31, and the funnel-shaped opening e1 on the middle layer elastic film 31, and then cutting and rolling.
Example 2
As shown in fig. 5, fig. 6 and fig. 7 in combination with fig. 3, the present invention discloses a breathable elastic composite nonwoven fabric 42, wherein the breathable elastic composite nonwoven fabric 42 is composed of a surface layer nonwoven fabric 12, a middle layer elastic film 32 and a bottom layer nonwoven fabric 22, the surface layer nonwoven fabric 12 and the bottom layer nonwoven fabric 22 are respectively provided with a plurality of strip-shaped convex regions a2, b2 and concave regions c2, d2 which are transversely arranged, the surface layer nonwoven fabric 12 is further provided with an opening structure f2, the middle layer elastic film 32 is provided with funnel-shaped openings e2, the concave regions c2 and d2 of the surface layer nonwoven fabric 12 and the bottom layer nonwoven fabric 22 are respectively compounded on the surface of the top and bottom of the funnel-shaped openings e2 of the middle layer elastic film 32, the compounding positions are up and down in one-to one correspondence, the surface layer nonwoven fabric 12 and the bottom layer nonwoven fabric 22 form strip-shaped breathable channels between the convex regions a2 and b2, the strip-shaped air-permeable passage comprises an air-permeable passage space x2 formed by the surface layer non-woven fabric 12 and the middle layer elastic film 32 and an air-permeable passage space y2 formed by the bottom layer non-woven fabric 22 and the middle layer elastic film 32, wherein: the spacing between the adjacent strip-shaped concave regions c2 and d2 is 8mm, the single strip-shaped convex regions a2 and b2 or the concave regions c2 and d2 are discontinuous, and the funnel-shaped opening density on the elastic film 31 of the middle layer is 132 pieces/cm2The area of the top surface of a single opening is 0.36mm2。
The breathable elastic composite nonwoven fabric of embodiment 2 of the invention is manufactured by the following method:
(1) in the elastic film opening process, a Thermoplastic Polystyrene Elastomer (TPE) is subjected to melt extrusion through a screw extruder A2 to form an elastic casting film; the elastic casting film enters a vacuum tapping device, the vacuum tapping device consists of a vacuum pump (not shown in the figure), a forming drum B2 connected with the vacuum pump and a forming net cage C2 positioned outside the forming drum, when the elastic film enters a vacuum suction port D2 of the vacuum tapping device, a plurality of funnel-shaped tapping e2 are formed on the surface under the action of internal and external pressure difference, and the elastic film 32 with the funnel-shaped tapping e2 is formed, wherein: the shape of the funnel-shaped opening e2 corresponds to the shape of the holes in the forming cylinder mould C2 outside the forming drum B2;
(2) in the elastic film transverse stretching process, after the elastic film 32 with the funnel-shaped opening E2 enters a transverse stretching device E2 consisting of a plurality of groups of clamps F2 positioned at two sides of the elastic film 32, the two sides are clamped by a plurality of groups of clamps F2, the transverse width is gradually increased, and the elastic film is gradually stretched to 270% of the original transverse width from an unstretched state;
(3) after the surface layer non-woven fabric 12 of the composite process is perforated by a perforating device consisting of a pair of needle rollers J2 and a concave roller I2, the surface layer non-woven fabric and the bottom layer non-woven fabric 22 respectively enter a composite device H2 consisting of a pair of convex rollers K2 and a smooth roller L2 from the upper surface and the lower surface of an elastic film 32 with funnel-shaped perforations e2 in a stretching state, wherein: the single protrusion on the convex roller K2 is an intermittent annular protrusion, and is combined with the elastic film 32 in the stretching state and provided with the funnel-shaped opening e2 at the position of the protrusion hot pressing through hot pressing compounding to form the elastic composite non-woven fabric 42 in the stretching state, wherein: the concave regions c2 and d2 of the surface layer non-woven fabric 12 and the bottom layer non-woven fabric 22 are respectively compounded on the surfaces of the top and the bottom of the funnel-shaped opening e2 of the middle layer elastic film 32, the compounding positions are up and down in one-to-one correspondence, the surface layer non-woven fabric 12 and the bottom layer non-woven fabric can be one or two of hot air non-woven fabric, spun-bonded non-woven fabric, spunlace non-woven fabric or melt-blown non-woven fabric, and the distance between adjacent annular bulges on the convex roller K2 is 20.8 mm;
(4) the contraction molding process releases a plurality of sets of clamps F2 on both sides of the elastic composite nonwoven fabric 42 in the stretched state, so that the width of the elastic composite nonwoven fabric 42 is contracted to an unstretched state, thereby forming the elastic composite nonwoven fabric 42 having a plurality of strip-shaped convex regions a2, b2 and concave regions c2, d2 which are transversely arranged on the surface layer nonwoven fabric 12 and the bottom layer nonwoven fabric 22, wherein the surface layer nonwoven fabric 12 has an opening structure F3, and the middle layer elastic film 32 has funnel-shaped openings e2, and then the elastic composite nonwoven fabric is cut and rolled.
Example 3
Referring to fig. 8, 9 and 10 in combination with fig. 3, the present invention discloses a breathable elastic composite nonwoven fabric 43, wherein the breathable elastic composite nonwoven fabric 43 is composed ofThe surface layer non-woven fabric 13, the middle layer elastic film 33 and the bottom layer non-woven fabric 23 are respectively provided with a plurality of strip-shaped convex areas a3, b3 and concave areas c3, d3 which are transversely arranged on the surface layer non-woven fabric 13 and the bottom layer non-woven fabric 23, the surface layer non-woven fabric 13 and the bottom layer non-woven fabric 23 are also provided with open structures f3, g3, the middle layer elastic film 33 is provided with funnel-shaped open holes e3, the concave areas c3, d3 of the surface layer non-woven fabric 13 and the bottom layer non-woven fabric 23 are respectively compounded on the surface of the funnel-shaped open holes e3 of the middle layer elastic film 33, the compounding positions are up and down in one-to-one correspondence, the surface layer non-woven fabric 13 and the bottom layer non-woven fabric 23 form strip-type air-permeable channels between the convex areas a3, b3, the strip-type air-permeable channels comprise an air-permeable channel space x3 formed by the surface layer non-woven fabric 13 and the middle layer non-woven fabric 33 and an air-permeable channel space y3 formed by the bottom layer non-woven fabric 23 and the middle layer elastic film 33, wherein: the spacing between the adjacent strip-shaped concave areas c3 and d3 is 6mm, the single strip-shaped convex areas a3 and b3 or the concave areas c3 and d3 are discontinuous, and the funnel-shaped opening density on the elastic film 33 of the middle layer is 50/cm2The area of the top surface of a single opening is 1.5mm2。
The breathable elastic composite nonwoven fabric of embodiment 3 of the invention is manufactured by the following method:
(1) in the elastic film opening process, a Thermoplastic Polystyrene Elastomer (TPE) is subjected to melt extrusion through a screw extruder A3 to form an elastic casting film; the elastic casting film enters a vacuum tapping device, the vacuum tapping device consists of a vacuum pump (not shown in the figure), a forming drum B3 connected with the vacuum pump and a forming net cage C3 positioned outside the forming drum, when the elastic film enters a vacuum suction port D3 of the vacuum tapping device, a plurality of funnel-shaped tapping e3 are formed on the surface under the action of internal and external pressure difference, and the elastic film 33 with the funnel-shaped tapping e3 is formed, wherein: the shape of the funnel-shaped opening e3 corresponds to the shape of the holes in the forming cylinder mould C3 outside the forming drum B3;
(2) in the elastic film transverse stretching process, after the elastic film 33 with the funnel-shaped opening E3 enters a transverse stretching device E3 consisting of a plurality of groups of clamps F3 positioned at two sides of the elastic film 33, the two sides are clamped by a plurality of groups of clamps F3, the transverse width is gradually increased, and the elastic film is gradually stretched to 300% of the original transverse width from an unstretched state;
(3) the surface layer non-woven fabric 13 of the composite process is perforated by a perforating device consisting of a pair of needle rollers J3 and a concave roller 13, the bottom layer non-woven fabric 22 is perforated by a perforating device consisting of a pair of needle rollers N3 and a concave roller O3, and then is respectively sprayed by a fixed-point glue spraying device G3 and a fixed-point glue spraying device G3', and then enters a composite device H3 consisting of a pair of convex rollers K3 and a smooth roller L3 from the upper surface and the lower surface of an elastic film 33 with funnel-shaped perforations e3 in a stretching state respectively, wherein: the single protrusion on the convex roller K3 is a discontinuous annular protrusion, and is combined with the elastic film 33 in the stretching state and provided with the funnel-shaped opening e3 at the positions of protrusion hot pressing and fixed point glue spraying through hot pressing compounding to form the elastic composite non-woven fabric 43 in the stretching state, wherein: the concave regions c3 and d3 of the surface layer non-woven fabric 13 and the bottom layer non-woven fabric 23 are respectively compounded on the surfaces of the top and the bottom of the funnel-shaped opening e3 of the middle layer elastic film 33, the compounding positions are up and down in one-to-one correspondence, the surface layer non-woven fabric 13 and the bottom layer non-woven fabric 23 can be one or two of hot air non-woven fabric, spun-bonded non-woven fabric, spunlace non-woven fabric or melt-blown non-woven fabric, the distance between adjacent annular bulges on the convex roller K3 is 18mm, and the distance between adjacent fixed point glue spraying openings is 18 mm;
(4) the contraction molding process releases a plurality of sets of clamps F3 on both sides of the stretched elastic composite nonwoven fabric 43 to contract the width of the elastic composite nonwoven fabric 43 to an unstretched state, thereby forming the elastic composite nonwoven fabric 43 having a plurality of strip-shaped convex regions a3, b3 and concave regions c3, d3 arranged in the transverse direction on the surface layer nonwoven fabric 13 and the bottom layer nonwoven fabric 23, and having the opening structures F3, g3 on the surface layer nonwoven fabric 13 and the bottom layer nonwoven fabric 23, and having the funnel-shaped opening e3 on the middle layer elastic film 33, and then cutting edges and rolling.
The properties of the elastic composite nonwoven fabrics manufactured in examples 1 and 2 were measured as follows:
Figure BDA0003110808370000171
the data show that the middle layer of the breathable elastic composite non-woven fabric is the elastic film with the funnel-shaped opening, and the elastic film with the funnel-shaped opening has moderate elasticity, so that people feel no constraint feeling, no compression feeling and no relaxation feeling, the pain caused by pressing blood vessels and nerves of a human body due to poor elasticity is effectively prevented, and the wearing comfort is improved; the continuous strip-type ventilation channel formed between the raised areas by the surface layer non-woven fabric and the bottom layer non-woven fabric can enable internal damp and hot air to permeate into a ventilation channel space formed by the bottom layer non-woven fabric and the elastic film when the garment is worn, the damp and hot air can rapidly diffuse in the length direction and the height direction of the ventilation channel space in the ventilation channel, enter the ventilation channel space formed by the elastic film and the surface layer non-woven fabric through the open pores of the elastic film, and then discharge the elastic composite non-woven fabric, so that the rapid heat conduction and moisture removal effects are achieved; the surface layer nonwoven fabric and the bottom layer nonwoven fabric in the embodiments 2 and 3 also have the open pore structure, and the air permeability of the elastic composite nonwoven fabric is further improved. The elastic composite non-woven fabric can be manufactured in a fixed-point glue spraying composite mode, a convex roller hot-pressing composite mode or a combination mode of the fixed-point glue spraying composite mode and the convex roller hot-pressing composite mode, and continuous or discontinuous elastic composite non-woven fabric with the air-permeable channels can be obtained by changing the positions of the annular bulges on the composite convex roller.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims.

Claims (19)

1. A breathable elastic composite non-woven fabric is characterized in that: ventilative elasticity composite nonwoven fabric constitute by superficial layer nonwoven fabric, intermediate level elastic film and bottom nonwoven fabric, all have many strip-shaped protruding regions and the concave region of transverse arrangement on superficial layer nonwoven fabric and the bottom nonwoven fabric, funnel-shaped trompil has on the elastic film of intermediate level, the concave region of superficial layer nonwoven fabric and bottom nonwoven fabric respectivelyCompound and be in on the top of the infundibulate trompil of intermediate level elastic film and the bottom surface of locating, and the one-to-one correspondence about the compound position, superficial layer non-woven fabrics and bottom non-woven fabrics form strip ventilation channel between protruding region, strip ventilation channel contain the ventilation channel space that superficial layer non-woven fabrics and intermediate level elastic film formed and the ventilation channel space that bottom non-woven fabrics and intermediate level elastic film formed, wherein: the distance between the adjacent strip-shaped concave areas is 2mm-10mm, and the funnel-shaped open pore density on the middle layer elastic film is 20-1600/cm2The area of the top surface of a single opening is 0.03mm2～2.5mm2。
2. A breathable, elastic composite nonwoven fabric according to claim 1, wherein: the non-woven fabrics of surface course and bottom are hot-blast non-woven fabrics, spunbonded nonwoven fabrics, spunlace non-woven fabrics or melt-blown non-woven fabrics.
3. A breathable, elastic composite nonwoven fabric according to claim 1, wherein: the elastic film of the middle layer comprises thermoplastic elastic resin, and the thermoplastic elastic resin is thermoplastic polystyrene elastomer, thermoplastic polyolefin elastomer or thermoplastic polyurethane elastomer.
4. A breathable, elastic composite nonwoven fabric according to claim 1, wherein: the surface layer non-woven fabric is also provided with an open pore structure.
5. A breathable, elastic composite nonwoven fabric according to claim 1, wherein: the bottom layer non-woven fabric is also provided with an open pore structure.
6. A breathable, elastic composite nonwoven fabric according to claim 1, wherein: the spacing between the concave areas of the adjacent strips is 3mm-8 mm.
7. A breathable, elastic composite nonwoven fabric according to claim 1, wherein: the single strip of raised or recessed areas may be continuous or intermittent.
8. A method for manufacturing breathable elastic composite non-woven fabric comprises the following specific steps:
(1) in the elastic film opening process, thermoplastic elastic resin is melted and extruded by a screw extruder to form an elastic cast film; elasticity curtain coating membrane gets into vacuum trompil device, vacuum trompil device by the vacuum pump, the forming drum that links to each other with the vacuum pump and be located the forming cylinder mould outside and constitute, work as when elasticity film gets into the vacuum suction mouth department at vacuum trompil device, because of inside and outside pressure differential's effect, forms a plurality of infundibulate trompils in the surface, forms the elasticity film that has the infundibulate trompil, wherein: the shape of the funnel-shaped opening is consistent with that of the hole on the forming mesh cage positioned outside the forming drum;
(2) in the elastic film transverse stretching process, after the elastic film with the funnel-shaped opening enters a transverse stretching device consisting of a plurality of groups of clamps positioned at two sides of the elastic film, the two sides are clamped by the plurality of groups of clamps, the transverse width is gradually increased, and the elastic film is gradually stretched to 200-300% of the original transverse width from an unstretched state;
(3) the compounding process is that the surface layer non-woven fabric and the bottom layer non-woven fabric enter a compounding device from the upper surface and the lower surface of the elastic film with the funnel-shaped opening in the stretching state respectively, and are compounded together with the elastic film with the funnel-shaped opening in the stretching state through hot-pressing compounding to form the elastic compound non-woven fabric in the stretching state, wherein: the concave areas of the surface layer non-woven fabric and the bottom layer non-woven fabric are respectively compounded on the surfaces of the top and the bottom of the funnel-shaped opening of the middle layer elastic film, and the compounding positions are in one-to-one correspondence;
(4) the shrinkage molding process loosens a plurality of groups of clamps on two sides of the elastic composite non-woven fabric in the stretching state to ensure that the width of the elastic composite non-woven fabric is shrunk to be in the unstretched state, a plurality of strip-shaped convex areas and concave areas which are transversely arranged are formed on the surface layer non-woven fabric and the bottom layer non-woven fabric, the elastic composite non-woven fabric with funnel-shaped holes is arranged on the middle layer elastic film, and then the edges are cut and the elastic composite non-woven fabric is rolled.
9. A method of manufacturing a breathable, elastic nonwoven fabric according to claim 8, wherein: the compounding device in the step (3) consists of a pair of smooth rollers; surface layer non-woven fabrics and bottom non-woven fabrics spout the mucilage binding and put through the fixed point respectively earlier and spout gluey, then get into among the composite set, through hot pressing complex, with the elastic film who is in tensile state and has funnel-shaped trompil spouts gluey position hot pressing position complex at the fixed point and is in the same place, forms the elastic composite non-woven fabrics that is in tensile state.
10. A method of manufacturing a breathable, elastic nonwoven fabric according to claim 9, characterized in that: and (4) in the step (3), the distance between adjacent glue spraying openings in the fixed-point glue spraying device is 4-30 mm.
11. A method of manufacturing a breathable, elastic nonwoven fabric according to claim 9, characterized in that: and (4) in the step (3), the distance between adjacent glue spraying openings in the fixed-point glue spraying device is 6-24 mm.
12. The method of manufacturing a breathable elastic composite nonwoven fabric according to claim 8, wherein: and (4) the compounding device in the step (3) is composed of a pair of convex rollers and smooth rollers, the surface layer non-woven fabric and the bottom layer non-woven fabric respectively enter the compounding device, and are compounded together at the hot pressing position of the convex rollers with the elastic film with the funnel-shaped opening in the stretching state through hot pressing, so that the elastic compound non-woven fabric in the stretching state is formed.
13. A method of making a breathable, elastic composite nonwoven fabric, as claimed in claim 12, wherein: the convex roller of the compounding device in the step (3) is provided with a plurality of continuous or discontinuous annular bulges distributed along the axial direction.
14. A method of manufacturing a breathable, elastic nonwoven fabric according to claim 13, wherein: and (4) the distance between adjacent annular bulges which are axially distributed on the convex roller of the compounding device in the step (3) is 4-30 mm.
15. A method of manufacturing a breathable, elastic nonwoven fabric according to claim 13, wherein: and (4) in the step (3), the distance between the annular bulges distributed on the convex roller of the compounding device along the axial direction is 6-24 mm.
16. A method of making a breathable, elastic composite nonwoven fabric, as claimed in claim 13, wherein: and the surface layer non-woven fabric and the bottom layer non-woven fabric are respectively sprayed with glue by a fixed-point glue spraying device before entering a composite device consisting of a pair of convex rollers and smooth rollers.
17. A method of making a breathable, elastic composite nonwoven fabric, as claimed in claim 16, wherein: the distance between adjacent glue spraying openings of the fixed-point glue spraying device is consistent with the distance between adjacent annular bulges which are axially distributed on the convex roller.
18. The method of manufacturing a breathable elastic composite nonwoven fabric according to claim 8, wherein: and (4) before entering the compounding device, the surface layer non-woven fabric in the step (3) enters a punching device consisting of a pair of needle rollers and a pair of concave rollers to perform a hole opening process.
19. The method of manufacturing a breathable elastic composite nonwoven fabric according to claim 8, wherein: and (4) before entering the compounding device, the bottom non-woven fabric in the step (3) enters a punching device consisting of a pair of needle rollers and a pair of concave rollers to perform a hole opening process.
CN202110650477.4A 2021-06-10 2021-06-10 Breathable elastic composite non-woven fabric and manufacturing method thereof Pending CN113558866A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115182092A (en) * 2022-07-28 2022-10-14 厦门延江新材料股份有限公司 Non-woven fabric with stripe protrusions on surface and absorbent product thereof
CN115320191A (en) * 2022-08-22 2022-11-11 浙江华晨非织造布有限公司 Multilayer composite longitudinal elastic non-woven fabric

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115182092A (en) * 2022-07-28 2022-10-14 厦门延江新材料股份有限公司 Non-woven fabric with stripe protrusions on surface and absorbent product thereof
WO2024021441A1 (en) * 2022-07-28 2024-02-01 厦门延江新材料股份有限公司 Non-woven fabric having stripe protrusions on surface, and absorption product thereof
CN115320191A (en) * 2022-08-22 2022-11-11 浙江华晨非织造布有限公司 Multilayer composite longitudinal elastic non-woven fabric
WO2024040726A1 (en) * 2022-08-22 2024-02-29 浙江华晨非织造布有限公司 Multi-layer composite longitudinal elastic non-woven fabric

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