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WO2022183692A1 - 一种新型弹性腰围无纺布及其成型工艺 - Google Patents

一种新型弹性腰围无纺布及其成型工艺 Download PDF

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Publication number
WO2022183692A1
WO2022183692A1 PCT/CN2021/113386 CN2021113386W WO2022183692A1 WO 2022183692 A1 WO2022183692 A1 WO 2022183692A1 CN 2021113386 W CN2021113386 W CN 2021113386W WO 2022183692 A1 WO2022183692 A1 WO 2022183692A1
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Prior art keywords
woven fabric
elastic
forming
elastic non
new
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PCT/CN2021/113386
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English (en)
French (fr)
Inventor
林笛
Original Assignee
泉州市汉威机械制造有限公司
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Publication of WO2022183692A1 publication Critical patent/WO2022183692A1/zh

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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
    • A61F13/15756—Applying tabs, strips, tapes, loops; Knotting the ends of 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
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15585—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers
    • A61F13/15593—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers having elastic ribbons fixed thereto; Devices for applying the ribbons
    • A61F13/15601—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers having elastic ribbons fixed thereto; Devices for applying the ribbons the ribbons being applied transversely to the direction of the movement of the webs the diapers are being made of
    • 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
    • A61F13/15764—Transferring, feeding or handling devices; Drives
    • 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
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/49007—Form-fitting, self-adjusting disposable diapers
    • A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F13/49011—Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the waist region
    • A61F13/49012—Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the waist region the elastic means being elastic panels
    • 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
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/496—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies in the form of pants or briefs
    • 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
    • A61F2013/15821—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing
    • A61F2013/15861—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for bonding
    • A61F2013/1591—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for bonding via adhesive
    • 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
    • A61F2013/15821—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing
    • A61F2013/15934—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for making non-woven
    • 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
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/49007—Form-fitting, self-adjusting disposable diapers
    • A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F13/4902—Form-fitting, self-adjusting disposable diapers with elastic means characterised by the elastic material
    • A61F2013/49025—Form-fitting, self-adjusting disposable diapers with elastic means characterised by the elastic material having multiple elastic strands
    • 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
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/49007—Form-fitting, self-adjusting disposable diapers
    • A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F13/4902—Form-fitting, self-adjusting disposable diapers with elastic means characterised by the elastic material
    • A61F2013/49033—Form-fitting, self-adjusting disposable diapers with elastic means characterised by the elastic material being elastic in transversal direction

Definitions

  • the invention relates to the field of raw materials for the production of sanitary products, in particular to a novel elastic waistline nonwoven fabric and a molding process thereof.
  • the present invention provides a novel elastic waist non-woven fabric and a molding process thereof, which solves the problem that the existing elastic waist non-woven fabric lacks comfort.
  • a new type of elastic waist non-woven fabric includes an upper layer elastic non-woven fabric, a lower layer elastic non-woven fabric and an elastic element sandwiched between the two.
  • the upper layer elastic non-woven fabric has staggered upper layers along its thickness direction.
  • the wavy line structure of the crest part and the upper trough part, the lower elastic non-woven fabric has a wavy line structure with staggered lower crest part and lower trough part along its thickness direction, when the elastic element is zero tension In the natural state, the elastic element is combined on the upper layer trough part and the lower layer wave crest part; They are not in contact with the elastic element, the elastic element is composed of 100-400 elastic bands arranged in parallel, and the diameter of the elastic band is between 50d-200d.
  • the elastic element is composed of two or more elastic bands with different stretch ratios, and is arranged in sequence along the width direction of the upper elastic non-woven fabric and the lower elastic non-woven fabric with increasing or decreasing stretch ratios, Form more than two elastic regions with different stretch ratios.
  • the stretch ratio of the upper layer elastic non-woven fabric, the lower layer elastic non-woven fabric and the elastic element after compounding is any value between 1-5 times.
  • the width of the upper elastic non-woven fabric and the lower elastic non-woven fabric is 100mm-200mm.
  • the width of the upper elastic non-woven fabric and the lower elastic non-woven fabric is 150 mm.
  • a molding process of a novel elastic waist non-woven fabric is characterized in that, comprises the following steps:
  • the elastics are 50d-200d Size 100-400 parallel set;
  • Hot melt adhesive is arranged between the upper elastic non-woven fabric and the elastic band, and the elastic band and the lower elastic non-woven fabric are bonded to form the new elastic waist non-woven fabric.
  • the elastic bands have two or more different stretch ratios, and are sequentially arranged in a manner of increasing or decreasing stretch ratios along the width direction of the upper elastic non-woven fabric and the lower elastic non-woven fabric to form more than two stretch ratios.
  • the meshing forming mechanism includes a forming roller set for forming the upper elastic non-woven fabric and the lower elastic non-woven fabric and a guide roller set for guiding, and the forming roller set includes a convex roller and a concave roller, so The outer surface of the concave roller is evenly distributed with forming grooves, the outer surface of the convex roller is provided with a forming boss adapted to the forming groove, and the width of the forming groove is larger than the width of the forming boss.
  • the meshing and forming mechanism further comprises a water mist nozzle arranged in front of the forming roller set for increasing the humidity of the non-woven fabric, and a hot air drying device set after the forming roller set for setting the shape.
  • the above-mentioned step 3 can also be performed by ultrasonic welding or heat pressing the upper elastic non-woven fabric, elastic band and lower elastic non-woven fabric to form the new elastic waist non-woven fabric.
  • the product structure adopted in the present invention is different from the previous product structure.
  • the upper layer elastic non-woven fabric and the lower layer elastic non-woven fabric are both wavy line cross-section structures, and elastic elements are sandwiched between the upper layer trough and the lower wave crest to form a three-dimensional gap
  • the structure of the elastic waist can better retain the softness and air permeability of the non-woven material, and it is not easy to cause streaks to the user, and has good comfort in use.
  • the advantages of waist material can also abandon its existing disadvantages;
  • the two layers of non-woven fabrics are first meshed and formed to form a wavy line structure, and then the two are compounded with rubber bands.
  • the forming process is simple and can accurately meet the production requirements. It is also easy to rectify existing equipment and reduce Equipment investment, reduce production costs.
  • FIG. 1 is a schematic structural diagram in the thickness direction of Embodiment 1 of the present invention.
  • FIG. 2 is a schematic structural diagram of a plane direction according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic structural diagram of an engaging molding mechanism according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram in the thickness direction of Embodiment 2 of the present invention.
  • a new type of elastic waist non-woven fabric includes an upper layer elastic non-woven fabric 1, a lower layer elastic non-woven fabric 2 and an elastic element 3 sandwiched between the two, the upper layer elastic non-woven fabric 1. It has a wavy line-like structure with staggered upper wave crests 11 and upper wave troughs 12 along its thickness direction, and the lower elastic non-woven fabric 2 has staggered lower wave crests 21 and lower wave troughs along its thickness direction.
  • the elastic element 3 when the elastic element 3 is in a natural state of zero tension, the elastic element 3 is compounded on the upper trough 12 and the lower crest 21, and the upper trough 12 and the lower
  • the composite positions of the wave crest portions 21 correspond to each other, and each of the upper wave crest portions 11 and each of the lower wave trough portions 22 are not in contact with the elastic element 3;
  • the composite can also be carried out in the form of ultrasonic welding or hot pressing;
  • the product structure used in this embodiment is different from the previous product structure, the upper elastic non-woven fabric and the lower elastic non-woven fabric are both wavy
  • the structure of the line cross-section, the upper wave trough and the lower wave crest are sandwiched with elastic elements to form a structure with three-dimensional gaps, which can make the elastic waist better retain the softness and air permeability of the non-woven material, and it is not easy for users. Scratch marks, with good use comfort;
  • the elastic element 3 is composed of three elastic bands with different stretch ratios arranged in parallel, and stretched along the width direction of the upper elastic non-woven fabric 1 and the lower elastic non-woven fabric 2
  • the ways of increasing or decreasing the elongation are set in sequence to form three elastic ranges of A, B and C with different stretching ratios.
  • the elasticity of the A area is the largest. When in use, the A area is located close to the position of the pants head of the absorbent article.
  • This position A larger stretch ratio is required to prevent the absorbent article from sliding down due to the user's activities during wearing; while the elastic bands with a stretch ratio smaller than that of the A zone are selected in the B and C areas, which can reduce the elasticity of the absorbent article below the trousers, and further It avoids a large pulling force on the corresponding position, ensures the close fit, and also avoids streaks caused by excessive elasticity, and improves the comfort when wearing.
  • the elastic element 3 is composed of 400 elastic bands. Specifically, the diameter of the elastic band is 50d. In this structure, compared with the 420d-620d used in the products on the market, the single elastic band is thinner, so the number of choices is larger. Choosing more elastic bands within the same width range can not only ensure the elastic element 3 elasticity, and can also better disperse the elasticity, the user is more comfortable when wearing, and can further reduce the occurrence of streaks;
  • the number of rubber bands can be selected from 100-400, and the diameter can be selected between 50d-200d, so that suitable elastic waist non-woven fabrics can be designed for different users;
  • the stretch ratio of the upper layer elastic non-woven fabric 1, the lower layer elastic non-woven fabric 2 and the elastic element 3 in this embodiment is 1. Also according to production requirements, the specifications and number of elastic bands can be adjusted to make the stretching Any value between 1 and 5 times the elongation ratio can be used.
  • the width of the upper elastic non-woven fabric 1 and the lower elastic non-woven fabric 2 selected for use is 150 mm. Also according to different products, the width of the upper elastic non-woven fabric 1 and the lower elastic non-woven fabric 2 can be 100mm-200mm.
  • this scheme discloses a molding process of a novel elastic waist non-woven fabric, which includes the following steps:
  • the elastics are 50d-200d Size 100-400 parallel set;
  • Hot melt adhesive is arranged between the upper elastic non-woven fabric and the elastic band, and the elastic band and the lower elastic non-woven fabric are bonded to form the new elastic waist non-woven fabric.
  • the elastic bands have two or more different stretch ratios, and are sequentially arranged in a manner of increasing or decreasing stretch ratios along the width direction of the upper elastic non-woven fabric and the lower elastic non-woven fabric to form more than two stretch ratios.
  • the meshing forming mechanism includes a forming roller set 4 for forming the upper elastic non-woven fabric and the lower elastic non-woven fabric and several guide roller sets 5 for guiding, and the forming roller set 5 includes convex rollers 41 and the concave roller 42, the outer surface of the concave roller 42 is evenly distributed with forming grooves 421, and the outer surface of the convex roller 41 is provided with a forming boss 411 adapted to the forming groove 421.
  • the width of the groove 421 is larger than the width of the forming boss 411 .
  • the elastic non-woven fabric enters between the convex roller 41 and the concave roller 42, and is deformed by the combined action of the forming boss 411 and the forming groove 421 to form a continuous wavy line structure;
  • the width is set larger, and the gap between the molding boss 411 and the molding groove 421 provides a buffer space for the deformation of the elastic non-woven fabric during production, and avoids the rupture of the elastic non-woven fabric due to the rigid structure of the two. It also reduces the installation difficulty and processing difficulty of the equipment;
  • a heating tube 43 can be embedded in the bottom of the molding groove 421 or in the molding boss 411, and a certain amount of heat can be applied after the elastic non-woven fabric is deformed to prevent it from occurring. Partial retraction after forming can have better forming effect;
  • the meshing forming mechanism further includes a water mist nozzle 6 arranged in front of the forming roller group 4 for improving the humidity of the elastic non-woven fabric, and a water mist nozzle 6 disposed behind the forming roller group 4 for shaping Hot air drying device 7.
  • the water mist nozzle 6 and the subsequent hot air drying device 7 are arranged to increase the humidity of the elastic non-woven fabric before forming, and after the deformation is dried by hot air, it is more conducive to setting and improving the forming efficiency and effect.
  • step 3 can also be performed by ultrasonic welding or thermocompression bonding of the upper elastic non-woven fabric, elastic band and lower elastic non-woven fabric to form the new elastic waist non-woven fabric.
  • the rubber band in production, can have a certain tension or no tension state before compounding; this embodiment adopts a tension-free state for production; and in the case of a certain tension, the rubber band will be formed after the cutting is completed.
  • the latter elastic non-woven product forms a further shrinking effect, increases the deformation amount of the upper elastic non-woven fabric and the lower elastic non-woven fabric, and also provides greater elasticity.
  • the two layers of non-woven fabrics are first meshed and formed to form a wavy line structure, and then the two are compounded with rubber bands.
  • the forming process is simple and can accurately meet the production requirements. It is also easy to rectify existing equipment and reduce Equipment investment, reduce production costs.
  • FIG. 4 compared with the first embodiment, it is another product structure that can realize the application scheme of the present invention.
  • the elastic element 3 is in a state of certain tension
  • the upper elastic non-woven fabric 1 is in a state of tension.
  • Spray glue with the sandwiching surface of the lower elastic non-woven fabric 2 to sandwich and adhere the elastic element 3.
  • each of the upper wave crest portions 11 and The lower-layer crest part 21 , the upper-layer trough part 12 correspond to the composite position of the lower-layer trough part 22 .
  • This is another production method of this scheme only the production method is different, and the corresponding technical effect can also be achieved.
  • the compounding in this embodiment is in the form of sizing and bonding, and the compounding may also be performed in the form of ultrasonic welding or hot pressing.

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

Abstract

一种新型弹性腰围无纺布，包括上层弹性无纺布(1)、下层弹性无纺布(2)以及夹设在两者之间的弹性元件(3)，上层弹性无纺布(1)沿其厚度方向呈具有交错设置的上层波峰部(11)及上层波谷部(12)的波浪线状结构，下层弹性无纺布(2)沿其厚度方向呈具有交错设置的下层波峰部(21)及下层波谷部(22)的波浪线状结构，当弹性元件(3)呈零张力的自然状态时，弹性元件(3)复合在上层波谷部(12)与下层波峰部(21)上，各上层波谷部(12)与下层波峰部(21)的复合位置相对应，各上层波峰部(11)、各下层波谷部(22)均与弹性元件(3)不相接触。

Description

一种新型弹性腰围无纺布及其成型工艺 技术领域
本发明涉及卫生用品产品生产原料领域，具体涉及一种新型弹性腰围无纺布及其成型工艺。
背景技术
现在市面上婴儿训练裤、女性安心裤、成人拉拉裤的弹性腰围常用的弹性腰围样式有两种，一种是上下两层无纺布之间加入橡筋复合而成，市面上常见的两层无纺布与橡筋复合的弹性腰围材料，一般是两层无纺布之间分布15-30根420d-620d左右粗细的橡筋，这种形式的弹性腰围由于橡筋较粗，容易产生勒痕，穿戴不舒适；而一种是弹性膜材料，弹性膜材料经过拉伸活化后具有一定的弹性，因此被应用于弹性腰围的制作。但是其拉伸倍率有限，弹性远不如橡筋制作的弹性腰围。且弹性膜材料价格高，应用在产品上会导致其成本的增加。同时，弹性膜材料透气性差，会导致穿戴不舒适。
发明内容
因此，本发明提供一种新型弹性腰围无纺布及其成型工艺，解决了现有的弹性腰围无纺布欠缺舒适性的问题。
为达到上述目的，本发明是通过以下技术方案实现的：
一种新型弹性腰围无纺布，包括上层弹性无纺布、下层弹性无纺布以及夹设在两者之间的弹性元件，所述上层弹性无纺布沿其厚度方向呈具有交错设置的上层波峰部及上层波谷部的波浪线状结构，所述下层弹性无纺布沿其厚度方向呈具有交错设置的下层波峰部及下层波谷部的波浪线状结构，当所述弹性元件呈零张力的自然状态时，所述弹性元件复合在所述上层波谷部与下层波峰部上，各所述上层波谷部与下层波峰部的复合位置相对应，各所述上层波峰部、各所述下层波谷部均与所述弹性元件不相接触，所述弹性元件为100-400根橡筋平行设置组成，所述橡筋的直径为50d-200d之间。
优选的，所述弹性元件由两种以上不同拉伸率的橡筋组成，并沿所述上层弹性无纺布与下层弹性无纺布的宽度方向以拉伸率递增或递减的方式依次设置，形成两个以上不同拉伸倍率的弹性区间。
优选的，所述上层弹性无纺布、下层弹性无纺布与弹性元件复合后的拉伸倍率为1-5倍之间的任意数值。
优选的，所述上层弹性无纺布与下层弹性无纺布的宽度为100mm-200mm。
优选的，所述上层弹性无纺布与下层弹性无纺布的宽度为150mm。
一种新型弹性腰围无纺布的成型工艺，其特征在于，包括以下步骤：
一、取两组弹性无纺布呈流水线布置，分别经一齿形啮合成型机构成型后分别形成上层弹性无纺布以及下层弹性无纺布，并继续向前输送；
二、在所述上层弹性无纺布与下层弹性无纺布之间加入沿两者宽度方向均布的复数根橡筋，并在所述橡筋上喷胶，所述橡筋为50d-200d尺寸的100-400根平行设置；
三、在所述上层弹性无纺布与橡筋、橡筋与下层弹性无纺布之间设置热熔胶而后进行粘合，形成所述新型弹性腰围无纺布。
优选的，所述橡筋具有两种以上不同拉伸率，并沿所述上层弹性无纺布与下层弹性无纺布的宽度方向以拉伸率递增或递减的方式依次设置，形成两个以上不同拉伸倍率的弹性区间。
优选的，所述啮合成型机构包括用于上层弹性无纺布与下层弹性无纺布成型的成型辊组以及用于导向的导向辊组，所述成型辊组包括凸辊以及的凹辊，所述凹辊外表面均布有成型凹槽，所述凸辊外表面设置有与所述成型凹槽适配的成型凸台，所述成型凹槽的宽度大于所述成型凸台的宽度。
优选的，所述啮合成型机构还包括设于所述成型辊组前的用于提高无纺布湿度的水雾喷头，以及设于所述成型辊组后用于定型的热风烘干装置。
优选的，上述步骤三也可以为将所述上层弹性无纺布、橡筋与下层弹性无纺布进行超声波焊接或者热压合，形成所述新型弹性腰围无纺布。
通过采用前述技术方案，本发明的有益效果是：
本发明所采用的产品结构与以往的产品结构不同，采用上层弹性无纺布与下层弹性无纺布均为波浪线截面的结构，上层波谷部与下层波峰部夹设弹性元件，形成具有立体空隙的结构，能够使弹性腰围更好的保留无纺布材料的柔软度和透气性，也不容易对使用者产生勒痕，具有良好的使用舒适性，既有市面上常用的两种样式的弹性腰围材料的优点，又能够将其所存在的弊端摒弃；
生产中，先对两层无纺布进行啮合成型使其形成波浪线结构而后在将两者与橡筋复合，成型过程简单，能够准确地达到生产要求，也便于对现有设备进行整改，减少设备投入，降低生产成本。
附图说明
图1为本发明实施例一的厚度方向的结构示意图；
图2为本发明实施例一的平面方向的结构示意图；
图3为本发明实施例一啮合成型机构的结构示意图；
图4为本发明实施例二的厚度方向的结构示意图。
具体实施方式
以下将结合具体实施例来详细说明本发明的实施方式，借此对本发明如何应用技术手段来解决技术问题，并达成技术效果的实现过程能充分理解并据以实施。
实施例一
参考图1及图2，一种新型弹性腰围无纺布，包括上层弹性无纺布1、下层弹性无纺布2以及夹设在两者之间的弹性元件3，所述上层弹性无纺布1沿其厚度方向呈具有交错设置的上层波峰部11及上层波谷部12的波浪线状结构，所述下层弹性无纺布2沿其厚度方向呈具有交错设置的下层波峰部21及下层波谷部22的波浪线状结构，当所述弹性元件3呈零张力的自然状态时，所述弹性元件3复合在所述上层波谷部12与下层波峰部21上，各所述上层波谷部12与下层波峰部21的复合位置相对应，各所述上层波峰部11、各所述下层波谷部22 均与所述弹性元件3不相接触；具体的，本实施例复合时采用热熔胶粘合的形式，需要指出的是，还可以采用超声波焊接或者热压的形式进行复合；本实施例所采用的产品结构与以往的产品结构不同，采用上层弹性无纺布与下层弹性无纺布均为波浪线截面的结构，上层波谷部与下层波峰部夹设弹性元件，形成具有立体空隙的结构，能够使弹性腰围更好的保留无纺布材料的柔软度和透气性，也不容易对使用者产生勒痕，具有良好的使用舒适性；
具体的，如图2所示，所述弹性元件3由三种不同拉伸率的橡筋平行设置组成，并沿所述上层弹性无纺布1与下层弹性无纺布2的宽度方向以拉伸率递增或递减的方式依次设置，形成A、B、C三个不同拉伸倍率的弹性区间，其中，A区的弹性最大，使用时，A区位置位于靠近吸收物品裤头的位置，这个位置需要较大的拉伸倍率，才能防止穿着时吸收物品由于使用者的活动而下滑；而B及C区则选择拉伸倍率小于A区的橡筋，能够减少吸收物品裤头以下部位的弹性，进而避免对相应位置产生较大的拉力，保证了贴身的同时也避免了弹力过大产生勒痕，提高穿着时的舒适性。
本实施例中，所述弹性元件3为400根橡筋组成。具体的，所述橡筋的直径为50d。这种结构，较之市面上产品所选用的420d-620d而言，单根橡筋较细，故而选择的数目较多，在相同的宽度范围内选择设置更多橡筋，不仅能够保证弹性元件3的弹性，而且也能更好地分散弹力，使用者穿着时更加舒适，进一步可以减少勒痕的情况出现；
并且，根据产品不同，橡筋数目可以选用100-400根，同时其直径可以选用50d-200d之间规格，这样可以针对不同的使用人群设计合适弹性的腰围无纺布；
根据上述设置，本实施例所述上层弹性无纺布1、下层弹性无纺布2与弹性元件3复合后的拉伸倍率为1，同样根据生产需求，可以调整橡筋规格及数目，使拉伸倍率处于1-5倍之间的任意数值均可。
本实施例中，选用的所述上层弹性无纺布1与下层弹性无纺布2的宽度为 150mm。同样根据产品不同，所述上层弹性无纺布1与下层弹性无纺布2的宽度为100mm-200mm均可。
同时，本方案公开了一种新型弹性腰围无纺布的成型工艺，包括以下步骤：
一、取两组弹性无纺布呈流水线布置，分别经一齿形啮合成型机构成型后分别形成上层弹性无纺布以及下层弹性无纺布，并继续向前输送；
二、在所述上层弹性无纺布与下层弹性无纺布之间加入沿两者宽度方向均布的复数根橡筋，并在所述橡筋上喷胶，所述橡筋为50d-200d尺寸的100-400根平行设置；
三、在所述上层弹性无纺布与橡筋、橡筋与下层弹性无纺布之间设置热熔胶而后进行粘合，形成所述新型弹性腰围无纺布。
优选的，所述橡筋具有两种以上不同拉伸率，并沿所述上层弹性无纺布与下层弹性无纺布的宽度方向以拉伸率递增或递减的方式依次设置，形成两个以上不同拉伸倍率的弹性区间。
具体参考图3，所述啮合成型机构包括用于上层弹性无纺布与下层弹性无纺布成型的成型辊组4以及若干用于导向的导向辊组5，所述成型辊组5包括凸辊41以及的凹辊42，所述凹辊42外表面均布有成型凹槽421，所述凸辊41外表面设置有与所述成型凹槽421适配的成型凸台411，所述成型凹槽421的宽度大于所述成型凸台411的宽度。成型时，弹性无纺布进入所述凸辊41与凹辊42之间，经成型凸台411与成型凹槽421共同作用发生形变，形成连续的波浪线状结构；同时由于成型凹槽421的宽度设定更大，在生产中成型凸台411与成型凹槽421之间的空隙为弹性无纺布的形变提供了缓冲空间，避免因两者的刚性结构导致弹性无纺布出现破裂的情况出现，而且也降低了设备的安装难度及加工难度；
本实施例中，为了提高成型后的定型效果，可在所述成型凹槽421的底部或成型凸台411内嵌置加热管43，在弹性无纺布发生形变后予以一定热量，避免其发生成型后的部分回缩，能够具有更好的成型效果；
本实施例中，所述啮合成型机构还包括设于所述成型辊组4前的用于提高弹性无纺布湿度的水雾喷头6，以及设于所述成型辊组4后用于定型的热风烘干装置7。设置水雾喷头6及后续的热风烘干装置7，在成型前提高弹性无纺布的湿度，形变后经热风烘干，更利于定型，提高成型效率及效果。
需要指出的是，上述步骤三也可以为将所述上层弹性无纺布、橡筋与下层弹性无纺布进行超声波焊接或者热压合，形成所述新型弹性腰围无纺布。
同时，在生产中，橡筋在复合前可以具有一定张力或无张力的状态；本实施例采用无张力状态进行生产；而在具有一定张力的情况下，在完成分切后橡筋会对成型后的弹性无纺布产品形成进一步的收缩效果，加大上层弹性无纺布与下层弹性无纺布的形变量，同时也提供更大的弹性。
生产中，先对两层无纺布进行啮合成型使其形成波浪线结构而后在将两者与橡筋复合，成型过程简单，能够准确地达到生产要求，也便于对现有设备进行整改，减少设备投入，降低生产成本。
实施例二
如图4所示，与实施例一相比，为另一种具有可实现本发明申请方案的产品结构，在生产时，弹性元件3为具有一定张力的状态，并对上层弹性无纺布1与下层弹性无纺布2的夹设面进行喷胶对弹性元件3进行夹设粘附，在成品后，当所述弹性元件3呈零张力的自然状态时，各所述上层波峰部11与下层波峰部21、上层波谷部12与下层波谷部22的复合位置相对应。此为本方案另一生产方式，仅生产方法不同，亦可达到相应的技术效果。
需要指出的是，本实施例复合时采用施胶粘合的形式，还可以采用超声波焊接或者热压的形式进行复合。
尽管结合优选实施方案具体展示和介绍了本发明，但所属领域的技术人员应该明白，在不脱离所附权利要求书所限定的本发明的精神和范围内，在形式上和细节上可以对本发明做出各种变化，均为本发明的保护范围。

Claims (10)

  1. 一种新型弹性腰围无纺布，其特征在于：包括上层弹性无纺布、下层弹性无纺布以及夹设在两者之间的弹性元件，所述上层弹性无纺布沿其厚度方向呈具有交错设置的上层波峰部及上层波谷部的波浪线状结构，所述下层弹性无纺布沿其厚度方向呈具有交错设置的下层波峰部及下层波谷部的波浪线状结构，当所述弹性元件呈零张力的自然状态时，所述弹性元件复合在所述上层波谷部与下层波峰部上，各所述上层波谷部与下层波峰部的复合位置相对应，各所述上层波峰部、各所述下层波谷部均与所述弹性元件不相接触，所述弹性元件为100-400根橡筋平行设置组成，所述橡筋的直径为50d-200d之间。
  2. 根据权利要求1所述的新型弹性腰围无纺布，其特征在于：所述弹性元件由两种以上不同拉伸率的橡筋组成，并沿所述上层弹性无纺布与下层弹性无纺布的宽度方向以拉伸率递增或递减的方式依次设置，形成两个以上不同拉伸倍率的弹性区间。
  3. 根据权利要求2所述的新型弹性腰围无纺布，其特征在于：所述上层弹性无纺布、下层弹性无纺布与弹性元件复合后的拉伸倍率为1-5倍之间的任意数值。
  4. 根据权利要求1或2或3所述的新型弹性腰围无纺布，其特征在于：所述上层弹性无纺布与下层弹性无纺布的宽度为100mm-200mm。
  5. 根据权利要求4所述的新型弹性腰围无纺布，其特征在于：所述上层弹性无纺布与下层弹性无纺布的宽度为150mm。
  6. 一种根据上述权利要求1所述的新型弹性腰围无纺布的成型工艺，其特征在于，包括以下步骤：
    一、取两组弹性无纺布呈流水线布置，分别经一齿形啮合成型机构成型后分别形成上层弹性无纺布以及下层弹性无纺布，并继续向前输送；
    二、在所述上层弹性无纺布与下层弹性无纺布之间加入沿两者宽度方向均布的复数根橡筋，并在所述橡筋上喷胶，所述橡筋为50d-200d尺寸的100-400根平行设置；
    三、在所述上层弹性无纺布与橡筋、橡筋与下层弹性无纺布之间设置热熔胶而后进行粘合，形成所述新型弹性腰围无纺布。
  7. 根据权利要求6所述的新型弹性腰围无纺布的成型工艺，其特征在于：所述橡筋具有两种以上不同拉伸率，并沿所述上层弹性无纺布与下层弹性无纺布的宽度方向以拉伸率递增或递减的方式依次设置，形成两个以上不同拉伸倍率的弹性区间。
  8. 根据权利要求7所述的新型弹性腰围无纺布的成型工艺，其特征在于：所述啮合成型机构包括用于上层弹性无纺布与下层弹性无纺布成型的成型辊组以及用于导向的导向辊组，所述成型辊组包括凸辊以及的凹辊，所述凹辊外表面均布有成型凹槽，所述凸辊外表面设置有与所述成型凹槽适配的成型凸台，所述成型凹槽的宽度大于所述成型凸台的宽度。
  9. 根据权利要求8所述的新型弹性腰围无纺布的成型工艺，其特征在于：所述啮合成型机构还包括设于所述成型辊组前的用于提高无纺布湿度的水雾喷头，以及设于所述成型辊组后用于定型的热风烘干装置。
  10. 根据权利要求6-9中任一项权利要求所述的新型弹性腰围无纺布的成型工艺，其特征在于：上述步骤三也可以为将所述上层弹性无纺布、橡筋与下层弹性无纺布进行超声波焊接或者热压合，形成所述新型弹性腰围无纺布。
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