CN215775723U

CN215775723U - Mask with coiled-structure melt-blown cloth

Info

Publication number: CN215775723U
Application number: CN202122027474.3U
Authority: CN
Inventors: 林芳兵; 张靖
Original assignee: Andanda Industrial Technology Shanghai Co ltd
Current assignee: Andanda Industrial Technology Shanghai Co ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2022-02-11
Anticipated expiration: 2031-08-26

Abstract

The utility model provides a mask with a crimped melt-blown fabric, which comprises a mask body and ear bands, wherein the ear bands are arranged on the mask body; the mask body comprises an outer-layer non-woven fabric layer, a melt-blown fabric layer and an inner-layer non-woven fabric layer which are arranged from outside to inside, wherein the melt-blown fabric layer is made of fibers with a curled structure, and the fibers comprise a plurality of polymer components with different heat shrinkage performances. The utility model has the advantages that the melt-blown fabric produced by two polymers with different heat shrinkage performances has the fiber in a spiral micro-crimp or strong crimp structure, the crimp degree is adjustable, the structure is fluffy, and the dust holding capacity of the mask is large; the specific surface area of the fiber is large, and the charged quantity is large, so that the mask has high filtering efficiency and small air suction resistance.

Description

Mask with coiled-structure melt-blown cloth

Technical Field

The utility model relates to the technical field of sanitary protection, in particular to a mask with a crimped structure and melt-blown cloth.

Background

The melt-blown fabric is a core material for manufacturing the mask, at present, one of the biggest pain points of the melt-blown fabric is small dust holding capacity, the required use time of the mask is generally specified to be 4-8 hours, and the resistance value of the mask is increased along with the increase of the use time. Therefore, the development of the mask with high dust-containing melt-blown cloth is a main solution for prolonging the service life of the mask and reducing the resistance in the use process.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides a mask with a melt-blown fabric with a curled structure, which utilizes the difference of shrinkage of fibers caused by different heat shrinkability of two polymer components to further curl, so that the melt-blown fabric is fluffy in structure and large in specific surface area of the fibers.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

a mask with crimped meltblown comprises a mask body and ear bands; the mask body comprises an outer-layer non-woven fabric layer, a melt-blown fabric layer and an inner-layer non-woven fabric layer which are arranged from outside to inside, wherein the melt-blown fabric layer is made of fibers with a curled structure, and the fibers comprise a plurality of polymer components with different heat shrinkage performances.

Further, the number of crimps of the fiber is 20 to 40 per 25 mm.

Furthermore, the porosity of the melt-blown cloth layer is 90-95%.

Further, the coiled structure is a spiral coiled structure.

Further, the polymer components are two.

Further, the polymer component is thermoplastic polyurethane and polypropylene.

Further, the mass ratio of the thermoplastic polyurethane to the polypropylene is 1: 9-3: 7.

Furthermore, the number of ear straps is two, sets up respectively in the relative both sides of gauze mask body.

The mask with the melt-blown cloth with the curled structure has the beneficial effects that:

1. the melt-blown fabric produced by two polymers with different heat shrinkage performances has the advantages that the fibers are in a spiral micro-curled or strong-curled structure, the curling degree is adjustable, the structure is fluffy, and the dust holding capacity of the mask is large.

2. The specific surface area of the fiber is large, and the charged quantity is large, so that the mask has high filtering efficiency and small air suction resistance.

Drawings

Fig. 1 is a schematic structural view of a mask having a rolled meltblown structure according to an embodiment of the present invention.

Fig. 2 is an enlarged schematic view of the mask a having a meltblown fabric with a rolled structure according to the present invention.

In the figure: (1) an outer non-woven fabric layer; (2) melt-blown fabric layer; (3) an inner non-woven fabric layer; (4) an ear band.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.

The utility model provides a mask with a crimped meltblown fabric, which comprises a mask body and an ear band 4, wherein the mask body comprises an outer nonwoven fabric layer 1, a meltblown fabric layer 2 and an inner nonwoven fabric layer 3 which are arranged from outside to inside; the number of the ear bands 4 is two, and the two ear bands are respectively arranged on two opposite sides of the mask body.

The melt-blown cloth layer 2 is made of fibers with a crimped structure, the fibers comprise a plurality of polymer components with different heat shrinkage performances, and preferably, the polymer components are Thermoplastic Polyurethane (TPU) and polypropylene (PP).

Firstly, placing a TPU raw material in a vacuum drying oven at 70-80 ℃ for drying for 24 hours for later use, and then blending the TPU and PP according to a certain proportion for later use, wherein the preferable mass ratio of the TPU to the PP is 1: 9-3: 7. Pouring the prepared TPU/PP blending system into a melt spinning machine, forming melt trickle under the high-temperature condition of a screw extruder, extruding the melt trickle through a spinneret orifice of a spinneret die head, and rapidly cooling and solidifying the melt trickle to form the superfine fiber melt-blown fabric. Due to different thermal shrinkage performances of TPU and PP, when the Thermoplastic Polyurethane (TPU) and the PP are cooled and solidified, as shown in figure 2, fibers are shrunk differently and are further curled, so that the fibers are in a spiral micro-curled or strong-curled structure, the structure of the melt-blown fabric is fluffy due to the curled structure, and the dust holding capacity of a mask manufactured by using the melt-blown fabric with the curled structure is large. According to the difference of the mass ratio of TPU and PP, the curling degree of the fiber can be adjusted, the curling number of the fiber can reach 20-40/25 mm, the porosity of the melt-blown cloth layer 2 can reach 90-95%, the specific surface area of the fiber is large, the charged amount is large, and the mask is high in filtering efficiency and small in air suction resistance.

Example 1

Firstly, placing TPU raw materials in a vacuum drying oven at 75 ℃ for drying for 24 hours, mixing the dried TPU raw materials with PP according to the mass ratio of 1:4, blending the TPU raw materials and the PP, pouring the blended TPU raw materials and the PP into a melt spinning machine, forming melt trickle under the high-temperature condition of a screw extruder, extruding the melt trickle through a spinneret orifice of a spinneret die head, and rapidly cooling and solidifying the melt trickle to form the superfine fiber melt-blown fabric with a spiral curled structure. As shown in fig. 1, the prepared meltblown fabric was used together with an outer nonwoven fabric layer 1, an inner nonwoven fabric layer 3, and an ear band 4 to produce a mask. In this example, the test results of the finished meltblown fabric prepared are shown in table 1.

Example 2

Firstly, placing TPU raw materials in a vacuum drying oven at 75 ℃ for drying for 24 hours, mixing the dried TPU raw materials with PP according to the mass ratio of 1:7, blending the TPU raw materials and the PP, pouring the blended TPU raw materials and the PP into a melt spinning machine, forming melt trickle under the high-temperature condition of a screw extruder, extruding the melt trickle through a spinneret orifice of a spinneret die head, and rapidly cooling and solidifying the melt trickle to form the superfine fiber melt-blown fabric with a spiral curled structure. As shown in fig. 1, the prepared meltblown fabric was used together with an outer nonwoven fabric layer 1, an inner nonwoven fabric layer 3, and an ear band 4 to produce a mask. In this example, the test results of the finished meltblown fabric prepared are shown in table 1.

TABLE 1

	Mass ratio of	Number of crimps	Porosity of the material	Efficiency of filtration	Resistance to air suction
						Example 1	TPU/PP＝1：4	20 pieces/25 mm	90％	99.12％	55Pa
Example 2	TPU/PP＝1：7	30 pieces/25 mm	92％	99.56％	48Pa

As can be seen from Table 1, the meltblown fabric produced by blending the TPU and PP materials has a crimped structure, high porosity, good filtration effect and low air suction resistance. The prepared melt-blown fabric with a curled structure, the outer non-woven fabric layer 1, the inner non-woven fabric layer 3 and the ear bands 4 can be used for manufacturing the mask with large dust holding capacity, high filtering efficiency and small air suction resistance. The heat shrinkage rate of PP is larger than that of TPU, the number of curls of the fibers is increased along with the increase of the content of the PP component, preferably, the mass ratio of TPU to PP is 1: 9-3: 7, and the content of the PP component can be increased as much as possible within a proper range so as to manufacture the mask with better filtering effect and smaller air suction resistance.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A mask with crimped meltblown comprises a mask body and ear bands; the mask body comprises an outer-layer non-woven fabric layer, a melt-blown fabric layer and an inner-layer non-woven fabric layer which are arranged from outside to inside, and is characterized in that the melt-blown fabric layer is made of fibers with a curled structure, and the fibers comprise a plurality of polymer components with different heat shrinkage performances.

2. The mask having a meltblown with a crimped structure according to claim 1, wherein the number of crimps of the fibers is 20 to 40 per 25 mm.

3. The mask with meltblown having a rolled structure of claim 1 wherein said meltblown layer has a porosity of between 90% and 95%.

4. The mask having a crimped meltblown fabric according to claim 1 wherein said crimp is a helical crimp.

5. The mask with a crimped meltblown fabric according to claim 1 wherein said polymeric components are two.

6. The mask having a meltblown with a rolled structure of claim 1 or 5 wherein the polymer component is a thermoplastic polyurethane or polypropylene.

7. The mask with the melt-blown cloth having the rolled structure according to claim 6, wherein the mass ratio of the thermoplastic polyurethane to the polypropylene is 1:9 to 3: 7.

8. The mask with meltblown having a rolled structure according to claim 1, wherein the number of ear straps is two, and the two ear straps are disposed at opposite sides of the mask body.