Medical mask and application thereof

A mask and bio-based technology, applied in the field of medical masks, can solve the problems of increasing the risk of bacterial and virus infection, accelerating static dissipation, and the lack of electrostatic adsorption capacity of medical masks

Active Publication Date: 2020-08-04
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the ambient humidity is relatively low, medical masks can play a good role in adsorption after being rubbed or charged by other methods. In severe weather such as snow, fog, etc., the polypropylene in the middle layer is very easy to accelerate the dissipation of static electricity due to the increase in humidity (L. Gu, et, al. Packaged triboelectric nanogenerator with high edurability for severe environments, Nanoscale.20

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Medical mask and application thereof
  • Medical mask and application thereof
  • Medical mask and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0045] The present invention does not specifically limit the preparation method of the medical mask, and those skilled in the art can prepare it according to the conventional method for preparing a mask.

[0046] The medical mask provided by the present invention is provided with a layer of bio-based composite fiber melt-blown layer. The bio-based composite fiber melt-blown is rich in hydroxyl groups and can form hydrogen bonds with water molecules in the environment under high humidity, thereby fixing water Molecules participate in triboelectrification. Due to the extremely strong electropositiveness of water molecules, this increases the overall charge of the bio-based composite fiber melt-blown layer, thereby increasing its electrostatic adsorption capacity, and the greater the humidity of the environment, the more water vapor exhaled by the human body. The middle layer of the mask The more the overall charge will be, the stronger the adsorption capacity will be.

[0047] ...

Embodiment 1

[0050] Accurately weigh 10 parts by weight of tapioca starch, 0.5 parts by weight of carrageenan and 1 part by weight of polyester fiber, mix them evenly, place them in a screw extruder, melt them at 180°C, and then cool the melt through a drafting air duct The fibers are formed by drafting and shaping, and the fibers are evenly adsorbed to the web-forming conveyor belt after passing through the diffusion air duct, forming a continuous mesh fiber layer. The continuous mesh fiber layer is prepared into a cloth with a hot rolling mill to obtain a bio-based composite fiber melt-blown cloth. The porosity of the bio-based composite fiber melt-blown cloth is 90%, and the average pore diameter is 2.3 μm.

[0051] Taking single-layer polypropylene melt-blown cloth (thickness 0.15mm) as the control group, polypropylene melt-blown cloth (thickness 0.15mm) and bio-based composite fiber melt-blown cloth (thickness 0.15mm) as the experiment For the control group and the experimental group,...

Embodiment 2

[0054] Accurately weigh 10 parts by weight of sodium alginate and 1 part by weight of polyester fiber, mix them and place them in a screw extruder, melt them at 180°C, cool the melt through a drafting air duct, and then hot-roll it into cloth. Cut to make a sodium alginate-based melt-blown cloth (thickness: 0.15mm, porosity: 84%, average pore size: 2.0μm). Taking the traditional polypropylene melt blown cloth (thickness 0.15mm) as a comparison, use a humidifier to spray water vapor on the two at the same time for 10 minutes, and then absorb polyester resin (PET) powder at the same time. The results show that: The area is "15cm×8cm" The sodium alginate melt-blown cloth can absorb PET powder with a total mass of 1.24g, while the polypropylene melt-blown cloth can only absorb 0.11g PET powder, indicating that the sodium alginate-based melt-blown cloth can perform well under high humidity Electrostatic adsorption properties.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Average pore sizeaaaaaaaaaa
Diameteraaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention provides a medical mask and a preparation method thereof, belonging to the technical field of protective materials. According to the invention, a bio-based composite fiber melt-blown layer is arranged in the mask, and the average pore diameter of the bio-based composite fiber melt-blown layer is set to be 1.5-2.5 microns and is the same as the pore diameter of a polypropylene melt-blown non-woven fabric layer, so filtering of tiny particles is guaranteed, and meanwhile, breathing difficulty of a wearer due to the fact that the pore diameter is too small is avoided. More importantly, hydroxyl groups rich in the bio-based composite fiber melt-blown layer can realize hydrogen-bond bonding with water molecules in an environment under the condition of high humidity, so the water molecules are fixed to participate in triboelectrification. Due to the fact that the electropositivity of water molecules is extremely high, the overall electric quantity of the bio-based composite fiber melt-blown layer is increased, so the electrostatic adsorption capacity of the bio-based composite fiber melt-blown layer is improved; and the larger the humidity of the environment is, the largerthe amount of water vapor exhaled by the human body is, the larger the overall electric quantity of the mask middle layer is, and the higher the adsorption capacity is. The mask provided by the invention can be well applied to a high-humidity environment.

Description

technical field [0001] The invention relates to the technical field of protective materials, in particular to a medical mask and its application. Background technique [0002] Traditional medical masks are mainly divided into two types according to the protection level: medical surgical masks and medical protection. Although these two masks are quite different in appearance design, they are similar in composition, that is, they are generally made of spunbond outer layer. It consists of three layers of non-woven fabric, melt-blown non-woven fabric in the middle layer and spun-bonded non-woven fabric in the inner layer. The fiber diameter of spunbond nonwoven fabric is relatively thick, generally around 20 microns. The main function of the inner and outer layers of spunbond nonwoven fabric is to support the structure of the entire nonwoven fabric, and the barrier effect is small; the middle layer is called the barrier layer or The melt-blown layer is the most important part o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): A41D13/11A41D31/02A41D31/04
CPCA41D13/11A41D31/02A41D31/04
Inventor 王道爱王楠楠周峰
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap