WO2023138427A1 - 一种空气过滤布及口罩 - Google Patents

一种空气过滤布及口罩 Download PDF

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WO2023138427A1
WO2023138427A1 PCT/CN2023/071310 CN2023071310W WO2023138427A1 WO 2023138427 A1 WO2023138427 A1 WO 2023138427A1 CN 2023071310 W CN2023071310 W CN 2023071310W WO 2023138427 A1 WO2023138427 A1 WO 2023138427A1
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filter
width
sheet
filtering
folded
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PCT/CN2023/071310
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English (en)
French (fr)
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温志光
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温志光
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Priority claimed from CN202210074030.1A external-priority patent/CN116492762A/zh
Priority claimed from CN202221611094.2U external-priority patent/CN220255766U/zh
Application filed by 温志光 filed Critical 温志光
Publication of WO2023138427A1 publication Critical patent/WO2023138427A1/zh

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    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/02—Masks
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes
    • A62B23/02—Filters for breathing-protection purposes for respirators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material

Definitions

  • the invention relates to the technical field of air filtration, in particular to an air filtration cloth and a mask.
  • N95 masks For epidemics or serious illnesses, medical masks or even N95 masks are generally used. For key medical posts, N95 masks or masks of the same protection level must be used.
  • the object of the present invention is to provide an air filter cloth and a mask in view of the defects and deficiencies of the prior art, which adopts a brand-new filter cloth structure and has the advantage of good filtering protection effect.
  • an air filter cloth including: a folding part and a positioning part; the folding part is folded from soft cloth into a plurality of connected folded structures with the same direction;
  • Each folded structure includes: a first filter sheet and a second filter sheet; the second filter sheet is connected to the first filter sheet and folded on the upper or lower side of the first filter sheet; the width of the first filter sheet is greater than the width of the second filter sheet; the width of the first filter sheet is 0.5-1.4cm; the width of the second filter sheet is 0.25-0.7cm;
  • the present invention further provides that the width of the first filter is 0.7-1.2 cm; the width of the second filter is 0.35-0.6 cm.
  • the present invention further provides that the width of the first filter is 1 cm; the width of the second filter is 0.5 cm.
  • the present invention further provides that the distance between two adjacent positioning parts is 4-6 cm.
  • the present invention further provides that the positioning portion is a suture.
  • the present invention further provides that both the first filter sheet and the second filter sheet have a multi-layer structure, at least including: a melt-blown cloth layer and a non-woven cloth layer.
  • a mask comprising: a three-dimensional cover body and a fixing belt, and the three-dimensional cover body is surrounded by the above-mentioned air filter cloth to form a three-dimensional support structure capable of accommodating mouth and nose.
  • the present invention further provides that the three-dimensional cover body is an N95 type mask cover body.
  • the present invention further provides that the outer side of the air filter cloth is provided with an outer film layer, and the inner side is provided with an inner film layer.
  • the present invention further provides that the fixing belt is a hanging ear or a strap.
  • the beneficial effects of the present invention are: in the utility model, the air filter cloth is provided with folded parts, and a plurality of positioning parts are arranged on the folded parts, so that the folded parts are not easy to loose; when made into a mask and worn, the folded part does not unfold the folded structure, but serves as a folded structure, so that the air passing through the air filter cloth will be filtered by the folded structure, which increases the air filtration area and enhances the filtering effect.
  • Fig. 1 is the structural representation of air filter cloth
  • Fig. 2 is a structural schematic diagram of the folded part in a loose state
  • Fig. 3 is a structural schematic diagram of completely flattening the folded part
  • Fig. 4 is a structural schematic diagram of the folded part being in a folded state and the first filter sheet covering the second filter sheet;
  • Fig. 5 is the structural representation of mouth mask.
  • This embodiment relates to an air filter cloth 10 , as shown in FIGS. 1-4 , including: a folded part 100 and a positioning part 200 .
  • the folding part 100 is folded from soft cloth to have a plurality of connected folding structures 110 in the same direction.
  • Each folded structure 110 includes: a first filter sheet 111 and a second filter sheet 112 .
  • the second filter sheet 112 is connected to the first filter sheet 111 and folded on the upper side or the lower side of the first filter sheet 111 .
  • the width of the first filter 111 is greater than the width of the second filter 112.
  • the width of the first filter 111 is 1 cm; the width of the second filter 112 is 0.5 cm. In other embodiments, the width of the first filter 111 is between 0.5-1.4 cm, and the width of the second filter 112 is between 0.25-0.7 cm. Preferably, the width of the first filter 111 is 0.7-1.2 cm; the width of the second filter 112 is 0.35-0.6 cm.
  • the width of the first filter disc 111 is 0.5cm, and the width of the second filter disc 112 is 0.25cm; in one embodiment, the width of the first filter disc 111 is 1.4cm, and the width of the second filter disc 112 is 0.7cm; is 1.2cm, and the width of the second filter 112 is 0.6cm.
  • the distance between two adjacent positioning parts 200 is 3-7 cm.
  • the positioning part 200 is a suture, and the distance between two adjacent sutures is 4.8 cm.
  • the positioning part 200 can also have other types, that is, there are many ways of fixing and forming, such as ultrasonic setting, welding forming, bonding forming, thermocompression forming, hot melt forming, etc.
  • the distance between two adjacent positioning parts 200 is 4-6 cm.
  • the distance between two adjacent positioning parts 200 is 3 cm; in one embodiment, the distance between two adjacent positioning parts 200 is 4 cm; in one embodiment, the distance between two adjacent positioning parts 200 is 5 cm; in one embodiment, the distance between two adjacent positioning parts 200 is 6 cm;
  • the air filter cloth 10 is provided with a folded part 100, and a plurality of positioning parts 200 are provided on the folded part 100, so that the folded part 100 is not easy to loose;
  • each folding structure 110 can be regarded as an air guide strip, and multiple air guide strips form a structure similar to a radiator, so that the air filter cloth 10 has good heat dissipation performance, can timely export water mist inside the mask, and has low breathing resistance, which is very suitable for children to wear.
  • the air filter cloth 10 is folded from soft fabric and can be rolled up, it is easy to use, carry, and process. It can be cut and sewed arbitrarily, and has various application scenarios.
  • the angle between the first filter sheet 111 and the second filter sheet 112 is less than 15 degrees. Furthermore, the angle between the first filter 111 and the second filter 112 is less than 5 degrees. In this embodiment, the second filter sheet 112 is closely attached to the first filter sheet 111 after being folded.
  • both the first filter sheet 111 and the second filter sheet 112 have a multi-layer structure, and at least include: a melt-blown cloth layer and a non-woven cloth layer.
  • This embodiment also relates to a mask for protecting the mouth and nose of a human body. As shown in FIG. 5 , it includes: a three-dimensional cover body 1 and a fixing belt 2 .
  • the three-dimensional cover body 1 is surrounded by the above-mentioned air filter cloth 10 to form a three-dimensional support structure capable of accommodating the mouth and nose.
  • the three-dimensional cover body 1 is an N95 type mask cover body. In other embodiments, the three-dimensional cover body 1 can also have other shapes.
  • the outer side of the air filter cloth 10 is provided with an outer film layer, and the inner side is provided with an inner film layer.
  • the fixing belt 2 is a hanging ear, which is convenient for wearing the mask on the ear of the human body.
  • the fixing belt 2 can also be a strap.
  • the working principle of the present invention is roughly as follows: the air filter cloth 10 is provided with a folded part 100, and a plurality of positioning parts 200 are arranged on the folded part 100, so that the folded part 100 is not easy to loosen;

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Emergency Management (AREA)
  • Business, Economics & Management (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Zoology (AREA)
  • Pulmonology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

一种空气过滤布及口罩，它涉及空气过滤技术领域。空气过滤布包括：折叠部和定位部；所述折叠部由软质布料折成具有多个相连的、且方向一致的折叠结构；每个所述折叠结构包括：第一滤片和第二滤片；所述第二滤片和所述第一滤片相连，且折叠在所述第一滤片的上侧或下侧；所述第一滤片的宽度大于所述第二滤片的宽度；所述第一滤片的宽度为0.5-1.4cm；所述第二滤片宽度为0.25-0.7cm；所述定位部有多个，且垂直于所述折叠部，以使所述折叠部不易松散，相邻两个所述定位部之间的距离为3-7cm。口罩包括：立体罩体以及固定带，所述立体罩体由上述的空气过滤布围合成可容置口鼻的立体支撑结构。采用上述技术方案，通过使用一种全新的滤布结构，具有过滤防护效果好的优势。

Description

一种空气过滤布及口罩 技术领域
本发明涉及空气过滤技术领域，具体涉及一种空气过滤布及口罩。
背景技术
保持健康是人类生存发展的最基本条件，对于呼吸道的健康而言，口罩是最常用、最重要的医用防护措施。常用的口罩分为三类：普通棉布口罩、一次性口罩(外科口罩)、N95型口罩，而对于疫情或病重的情况下，一般多选用医用口罩甚至是N95口罩，对于重点的医护岗位必须是N95类型或是同等防护级别的口罩。
现有的普通棉布口罩和一次性口罩(外科口罩)过滤效果一般，其口罩滤布虽然带有折叠结构，但使用时是将折叠结构展开，并不能通过折叠结构来增强过滤防护效果。
发明内容
本发明的目的在于针对现有技术的缺陷和不足，提供一种空气过滤布及口罩，采用一种全新的滤布结构，具有过滤防护效果好的优势。
为实现上述目的，本发明采用的技术方案是：一种空气过滤布，包括：折叠部和定位部；所述折叠部由软质布料折成具有多个相连的、且方向一致的折叠结构；
每个所述折叠结构包括：第一滤片和第二滤片；所述第二滤片和所述第一滤片相连，且折叠在所述第一滤片的上侧或下侧；所述第一滤片的宽度大于所述第二滤片的宽度；所述第一滤片的宽度为0.5-1.4cm；所述第二滤片宽 度为0.25-0.7cm；
所述定位部有多个，且垂直于所述折叠部，以使所述折叠部不易松散，相邻两个所述定位部之间的距离为3-7cm。
本发明进一步设置，所述第一滤片的宽度为0.7-1.2cm；所述第二滤片宽度为0.35-0.6cm。
本发明进一步设置，所述第一滤片的宽度为1cm；所述第二滤片宽度为0.5cm。
本发明进一步设置，相邻两个所述定位部之间的距离为4-6cm。
本发明进一步设置，所述定位部为缝合线。
本发明进一步设置，所述第一滤片和所述第二滤片均为多层结构，至少包括：熔喷布层和无纺布层。
本发明采用的另一种技术方案是：一种口罩，包括：立体罩体以及固定带，所述立体罩体由上述的空气过滤布围合成可容置口鼻的立体支撑结构。
本发明进一步设置，所述立体罩体为N95型口罩罩体。
本发明进一步设置，所述空气过滤布的外侧设置有外膜层，内侧设置有内膜层。
本发明进一步设置，所述固定带为挂耳或绑带。
采用上述技术方案后，本发明有益效果为：在本实用新型中，空气过滤布设置有折叠部，且在折叠部上设置有多个定位部，使得折叠部不易松散；制成口罩佩戴时，该折叠部并不会将折叠结构展开，而是作为折叠结构，使得通过该空气过滤布的空气会经过折叠结构的过滤，加大了空气过滤面积，增强了过滤效果。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是空气过滤布的结构示意图；
图2是折叠部处于松散状态的结构示意图；
图3是将折叠部完全展平的结构示意图；
图4是折叠部处于折叠状态，第一滤片覆盖第二滤片的结构示意图；
图5是口罩的结构示意图。
附图标记说明：1、立体罩体；2、固定带；10、空气过滤布；100、折叠部；110、折叠结构；111、第一滤片；112、第二滤片；200、定位部。
具体实施方式
以下结合附图对本发明作进一步详细说明。
本具体实施例仅仅是对本发明的解释，其并不是对本发明的限制，本领域技术人员在阅读完本说明书后可以根据需要对本实施例做出没有创造贡献的修改，但只要在本发明的权利要求范围内都受到专利法的保护。
本实施例涉及一种空气过滤布10，如图1-图4所示，包括：折叠部100和定位部200。折叠部100由软质布料折成具有多个相连的、且方向一致的折叠结构110。
每个折叠结构110包括：第一滤片111和第二滤片112。第二滤片112和第一滤片111相连，且折叠在第一滤片111的上侧或下侧。第一滤片111的 宽度大于第二滤片112的宽度。
具体在本实施例中，第一滤片111的宽度为1cm；第二滤片112宽度为0.5cm。在其他实施例中，第一滤片111的宽度在0.5-1.4cm之间，第二滤片112宽度为0.25-0.7cm之间即可。优选的，第一滤片111的宽度为0.7-1.2cm；第二滤片112宽度为0.35-0.6cm。以下再列举部分具体例子：在一实施例中，第一滤片111的宽度为0.5cm，第二滤片112宽度为0.25cm；在一实施例中，第一滤片111的宽度为1.4cm，第二滤片112宽度为0.7cm；在一实施例中，第一滤片111的宽度为0.7cm，第二滤片112宽度为0.35cm；在一实施例中，第一滤片111的宽度为1.2cm，第二滤片112宽度为0.6cm。
定位部200有多个，且垂直于折叠部100，以使折叠部100不易松散。相邻两个定位部200之间的距离为3-7cm。具体在本实施例中，定位部200为缝合线，且相邻两条缝合线之间的距离为4.8cm.在其他实施例中，定位部200还可以有其他类型，即固定成型方式有多种，超声定型、焊接成型、粘合成型、热压成型、热熔成型等等。优选的，相邻两个定位部200之间的距离为4-6cm。以下再列举部分具体例子：在一实施例中，相邻两个定位部200之间的距离为3cm；在一实施例中，相邻两个定位部200之间的距离为4cm；在一实施例中，相邻两个定位部200之间的距离为5cm；在一实施例中，相邻两个定位部200之间的距离为6cm；在一实施例中，相邻两个定位部200之间的距离为7cm。
空气过滤布10设置有折叠部100，且在折叠部100上设置有多个定位部200，使得折叠部100不易松散；制成口罩佩戴时，该折叠部100并不会将折叠结构110展开，而是作为折叠结构110，使得通过该空气过滤布10的空气会经过折叠结构110的过滤，加大了空气过滤面积，增强了过滤效果。
此外，折叠部100中，每个折叠结构110都可以看成是一个导气条，多个导气条形成类似散热器的结构，使得该空气过滤布10散热性能好、能及时导出口罩内部水雾、呼吸阻力小，十分适合儿童佩戴。
此外，由于该空气过滤布10采用软质布料折成，能卷起，使用携带方便，加工方便，可以任意裁剪，缝合，应用场景丰富，至少能运用在空调入风口病毒过滤，通风窗户病毒过滤，口罩过滤，汽车通风过滤。
作为一个优选的方案，第一滤片111和第二滤片112之间的角度小于15度。更进一步地，第一滤片111和第二滤片112之间的角度小于5度。在本实施例中，第二滤片112折叠后紧贴着第一滤片111。
在本实施例中，第一滤片111和第二滤片112均为多层结构，且至少包括：熔喷布层和无纺布层。
本实施例还涉及一种口罩,用于对人体口部和鼻部进行防护。如图5所示，包括：立体罩体1以及固定带2。立体罩体1由上述的空气过滤布10围合成可容置口鼻的立体支撑结构。
在本实施例中，立体罩体1为N95型口罩罩体。在其他实施例中，立体罩体1还可以为其他形状。
在本实施例中，空气过滤布10的外侧设置有外膜层，内侧设置有内膜层。
在本实施例中，固定带2为挂耳，便于将口罩穿戴在人体耳朵处，在其他实施例中，固定带2还可以为绑带。
本发明的工作原理大致如下述：空气过滤布10设置有折叠部100，且在折叠部100上设置有多个定位部200，使得折叠部100不易松散；制成口罩佩戴时，该折叠部100并不会将折叠结构110展开，而是作为折叠结构110，使得通过该空气过滤布10的空气会经过折叠结构110的过滤，加大了空气过滤 面积，增强了过滤效果。
以上，仅用以说明本发明的技术方案而非限制，本领域普通技术人员对本发明的技术方案所做的其它修改或者等同替换，只要不脱离本发明技术方案的精神和范围，均应涵盖在本发明的权利要求范围当中。

Claims (10)

  1. 一种空气过滤布，其特征在于：包括：折叠部(100)和定位部(200)；所述折叠部(100)由软质布料折成具有多个相连的、且方向一致的折叠结构(110)；
    每个所述折叠结构(110)包括：第一滤片(111)和第二滤片(112)；所述第二滤片(112)和所述第一滤片(111)相连，且折叠在所述第一滤片(111)的上侧或下侧；所述第一滤片(111)的宽度大于所述第二滤片(112)的宽度；所述第一滤片(111)的宽度为0.5-1.4cm；所述第二滤片(112)宽度为0.25-0.7cm；
    所述定位部(200)有多个，且垂直于所述折叠部(100)，以使所述折叠部(100)不易松散，相邻两个所述定位部(200)之间的距离为3-7cm。
  2. 根据权利要求1所述的空气过滤布，其特征在于，所述第一滤片(111)的宽度为0.7-1.2cm；所述第二滤片(112)宽度为0.35-0.6cm。
  3. 根据权利要求2所述的空气过滤布，其特征在于，所述第一滤片(111)的宽度为1cm；所述第二滤片(112)宽度为0.5cm。
  4. 根据权利要求1所述的空气过滤布，其特征在于，相邻两个所述定位部(200)之间的距离为4-6cm。
  5. 根据权利要求1所述的空气过滤布，其特征在于，所述定位部(200)为缝合线。
  6. 根据权利要求1所述的空气过滤布，其特征在于，所述第一滤片(111)和所述第二滤片(112)均为多层结构，至少包括：熔喷布层和无纺布层。
  7. 一种口罩，其特征在于：包括：立体罩体(1)以及固定带(2)，所述立体罩体(1)由权利要求1-权利要求6中任意一项所述的空气过滤布(10)围合成 可容置口鼻的立体支撑结构。
  8. 根据权利要求7所述的口罩，其特征在于，所述立体罩体(1)为N95型口罩罩体。
  9. 根据权利要求7所述的口罩，其特征在于，所述空气过滤布(10)的外侧设置有外膜层，内侧设置有内膜层。
  10. 根据权利要求7所述的口罩，其特征在于，所述固定带(2)为挂耳或绑带。
PCT/CN2023/071310 2022-01-21 2023-01-09 一种空气过滤布及口罩 WO2023138427A1 (zh)

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CN202221611094.2U CN220255766U (zh) 2022-06-25 2022-06-25 一种快速蒸发水分的散热口罩
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110036353A1 (en) * 2009-08-14 2011-02-17 Moldex-Metric, Inc. Filter material and respirator mask
CN204273335U (zh) * 2014-12-04 2015-04-22 单仁勇 具有折叠式滤芯的口罩
CN104623824A (zh) * 2013-11-07 2015-05-20 林净植 过滤结构
CN111588122A (zh) * 2020-05-28 2020-08-28 湖北康宁防护用品有限公司 一种口罩及其加工工艺
KR20200139588A (ko) * 2019-06-04 2020-12-14 권오성 형상 유지 및 밀폐 강화형 주름 마스크
CN214340287U (zh) * 2020-12-31 2021-10-08 深圳市蛙巢医疗科技有限公司 一种具有折叠式过滤结构的透明口罩
CN113940466A (zh) * 2020-12-31 2022-01-18 深圳市蛙巢医疗科技有限公司 一种可拆卸式面罩
CN215531817U (zh) * 2021-02-03 2022-01-18 王晓琳 一种呼吸护罩

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110036353A1 (en) * 2009-08-14 2011-02-17 Moldex-Metric, Inc. Filter material and respirator mask
CN104623824A (zh) * 2013-11-07 2015-05-20 林净植 过滤结构
CN204273335U (zh) * 2014-12-04 2015-04-22 单仁勇 具有折叠式滤芯的口罩
KR20200139588A (ko) * 2019-06-04 2020-12-14 권오성 형상 유지 및 밀폐 강화형 주름 마스크
CN111588122A (zh) * 2020-05-28 2020-08-28 湖北康宁防护用品有限公司 一种口罩及其加工工艺
CN214340287U (zh) * 2020-12-31 2021-10-08 深圳市蛙巢医疗科技有限公司 一种具有折叠式过滤结构的透明口罩
CN113940466A (zh) * 2020-12-31 2022-01-18 深圳市蛙巢医疗科技有限公司 一种可拆卸式面罩
CN215531817U (zh) * 2021-02-03 2022-01-18 王晓琳 一种呼吸护罩

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