KR101300881B1 - Ear loop of disposable mask and method for producing the same - Google Patents

Abstract

An object of the present invention is to provide an earring portion in which the wearer is less likely to feel pain or discomfort in the ear during mounting of the disposable mask.

The earring portion of the disposable mask is formed by mechanically interlacing and crimping a mixture of the polyolefin crimped composite fiber and the polyester crimped composite fiber.

Description

EAR LOOP OF DISPOSABLE MASK AND METHOD FOR PRODUCING THE SAME}

1 is a side view of a disposable mask according to the present invention.

2 is a perspective view of the mask.

3 is a schematic diagram for measuring the elongation stress and elongation rate of the earring part.

Description of the Related Art

10: mask

11: covering part

12: earrings

The present invention has a disposable mask, more specifically, a coating portion for the nose and mouth of the wearer, and an earring portion extending from both sides thereof, for use in general hygiene, hospitals, food factories, dusty workplaces, and the like. To earrings of disposable masks suitable for use over a relatively long time, and to a method of manufacturing the same.

Conventionally, in this kind of mask, it is known that the earring part is formed from the elastic stretchable fiber nonwoven fabric. For example, Patent Document 1 discloses a disposable mask in which an earring portion is formed of a composite fiber nonwoven fabric of an elastic stretchable layer and an inelastic stretchable layer. This well-known technique arranges the melt blown fiber nonwoven fabric of urethane type and styrene elastomer in the said elastic stretch layer, arranges the spunbond fiber nonwoven fabric of polypropylene in the said inelastic stretch layer, and expands earring part to some extent, and has desired elasticity Is to be obtained.

[Patent Document 1] Japanese Patent Application Laid-Open No. 2001-245998

In the above-described prior art, since the earring portion is the above-described configuration, not only the complicated operation that requires the wearer to extend the earring portion to some extent by hand when mounting the mask is necessary, but also if the operation is neglected, it is relatively short time after installation. There is a problem in that the elongation stress of the earring portion is so strong that the wearer feels pain or discomfort in the ear.

The present inventors earnestly examined for the purpose of obtaining a mask that the wearer does not feel pain in the ear even after a relatively long time of wearing, and can sustain a predetermined mask holding force / extension stress over the time. In order to achieve the present invention, it is possible to achieve the object by mixing crimped composite fibers in a specific ratio, and mechanically entangle the fibers by fiber entanglement, that is, jetting water and expressing thermal crimping. Reached.

The present invention is an improvement of the earring part of a disposable mask formed of a heat-sealing and elastic stretchable fiber nonwoven fabric having a coating part for the nose and mouth of the wearer, and an earring part extending from both sides of the coating part, and an improvement of the manufacturing method thereof. Regarding the present invention, each of the following aspects is featured.

One embodiment of the present invention is as follows. That is, the earring part is characterized by including the following characteristics of a to d.

a. Having a unit weight of 80 g / m 2 to 130 g / m 2;

b. A characteristic consisting of a mixture of 75% to 25% by weight of polyolefin crimped composite fiber and 25% to 75% by weight of polyester crimped composite fiber;

c. Mechanically entangle the polyolefin-based and polyester-based crimped composite fibers to maintain a nonwoven form; And

d. The stretch stress at 50% elongation is 0.02 N / mm 2 to 0.04 N / mm 2, and the initial elongation at 50% elongation is 2% to 10%.

Another embodiment of the present invention resides in the following point. That is, the method of manufacturing the earring part to connect the earring part formed of the heat sealable and elastic stretchable fiber nonwoven fabric by heat welding includes the following steps a to c.

a. Support a fiber web of unit weight of 80 g / m 2 to 130 g / m 2 composed of a mixture of 75% to 25% by weight of polyolefin-based latent crimped composite fiber and 25% to 75% by weight of polyester-based latent crimped composite fiber. Treating the fibrous web by jetting water flow from an orifice arranged in a constant pitch in the same direction across the width direction, and interlacing the fibers of the fibrous web with each other;

b. Then heat treating the fibrous web to shrink the polyolefin-based latent crimped composite fiber to express crimp, and to contract the polyester-based latent crimped composite fiber to express crimp, thereby forming an elastic stretchable fiber nonwoven fabric; And

c. Cutting the nonwoven fabric into an appropriate shape to obtain an earring having an elongation stress at 50% elongation of 0.02 N / mm 2 to 0.04 N / mm 2 and an initial elongation at 50% elongation of 2% to 10%.

In addition, in one aspect of the present invention, in order to achieve the desired purpose, the relationship between the weight% of the polyolefin crimped composite fiber and the weight% of the polyester crimped composite fiber is equal to the former weight%> the latter weight%. It is preferable that the weight% of the former ≤ any weight% of the latter, in particular, the weight% of the former ≥ the weight% of the latter.

Moreover, in another said aspect of this invention, in order to achieve the desired objective, the said earring part is cut | disconnected and obtained so that the said width direction in the said nonwoven fabric may substantially correspond to the longitudinal direction of the said earring part, and the said coating | cover by heat welding It is preferable to connect to both sides of a part.

In the present invention, the term "initial elongation rate" refers to the ratio of the elongated portion to the original length, which is increased with respect to the fixed length (circle length) when the earring portion of the unused mask is stretched by 50% in the longitudinal direction and then contracted. Mean in percent.

An embodiment of the earring part of the disposable mask according to the present invention will be described with reference to the illustrated example.

<Earring part of mask>

1 and 2, the disposable mask 10 includes a covering 11 for the nose and mouth of the wearer, and a pair of earrings 12 that hang on the wearer's ear and maintain the covering 11. It is composed of The covering portion 11 is formed in such a way that the periphery is fitted to the face of the wearer by the thermoplastic sheet members 11a and 11b of the same size and substantially the same shape as the inelastic stretch, and a proper distance is formed between the wearer's nose and the mouth. However, in some cases, the covering part 11 may have some elastic elasticity. The covering part 11 is formed by joining by the heat seal along the front edge 13 of the sheet member 11a, 11b which curves forward.

The earring portion 12 is formed of sheet members 12a and 12b having elastic elasticity in all directions extending along the surface thereof, in particular in the longitudinal direction thereof, and passes through the ear of the wearer almost at the center along the longitudinal direction. A slit 14a for forming the opening 14 to be made is provided. The sheet members 12a and 12b have a shape that gradually narrows from these bases 15 to their end portions 16, and forms the covering portion 11 by heat seals along these bases 15. As shown in FIG. It is joined to the sheet member 11a, 11b to make.

The sheet members 12a and 12b forming the earring portion 12 are formed of a thermoplastic elastic stretchable fiber nonwoven fabric. The elastic stretchable fiber nonwoven fabric has a unit weight of 80 g / m 2 to 130 g / m 2, and is composed of a mixture of 75% to 25% by weight of polyolefin crimped composite fiber and 25% to 75% by weight of polyester crimped composite fiber. do. As the polyolefin crimped composite fiber, it is preferable to crimp a composite fiber of a high melt polypropylene fiber and a low melt (modified) polypropylene fiber, and the polyester crimped composite fiber is a high melt polyester fiber and a low melt (modified) fiber. It is preferable to crimp the composite fiber of polyester fiber.

The mixing ratio of the polyolefin-based crimped composite fiber and the polyester-based crimped composite fiber is intended for the purpose of the present invention, in particular, the wearer wears the mask according to the present invention over a daily active time of the wearer, for example, 8 to 16 hours. In order to achieve the purpose of not having any pain in the ears, it is an indispensable technical matter with the classification of these crimped composite fibers. The relationship between the weight% of the polyolefin crimped composite fiber and the weight% of the polyester crimped composite fiber may be any one of the weight% of the former> weight% of the latter and weight% of the former ≤ weight% of the latter in the above range. However, it is particularly preferred that the former weight% ≥the latter weight%. In particular, the mixing and ratio of the polyester-based crimped composite fiber have a predetermined elongation stress and initial elongation rate of the earring portion 12, that is, an elongation stress at 50% elongation is 0.02 N / mm 2 to 0.04 N / mm 2, 50 It is indispensable in obtaining the technical details that the initial elongation rate at% elongation is 2% to 10%. If the numerical value is not satisfied, the covering 11 of the mask cannot be maintained on the face in a desirable adhesion state, and at the same time, the holding force (detachability and durability of the mask) by the earring part decreases as the number of detachment of the mask increases. . More specifically, when the elongation stress is less than 0.02 N / mm 2 and the initial elongation is more than 10%, a predetermined tension is applied to the earring portion 12 so that the covering portion 11 sufficiently adheres to the face of the wearer and performs its function. This does not occur, i.e., sufficient retaining force on the covering portion of the earring portion cannot be obtained, and the earring portion is immediately relaxed by repeated removal of the mask. In addition, when the elongation stress is more than 0.04 N / mm 2 and the initial elongation is less than 2%, the wearer may feel pain or discomfort in the ear when the mask is worn for a relatively long time.

In addition, in order to achieve the desired object of the present invention, it is an indispensable technical matter to mechanically entangle the crimped composite fibers forming the earring portion, that is, to entangle the fibers by spraying water and maintain the nonwoven fabric form. If these fibers maintain the nonwoven form by thermal welding, not only the earring part having a good touch can be obtained, but also the indispensable technique of each earring part 12 so that the elongation stress and initial elongation can be obtained in the predetermined range. It is difficult to construct the present invention so as to properly adjust the matters to achieve the desired object of the present invention. In other words, if the fiber is entangled by the jet stream to maintain the nonwoven fabric shape, it is easy to appropriately adjust each indispensable technical matter of the earring section 12, and as a result, the present invention to achieve the desired object of the present invention. It is easy to construct.

Incidentally preferred technical matters, the polyolefin crimped composite fibers and polyester crimped composite fibers having a fineness of 1 dtex to 6 dtex, fiber length 25 mm to 60 mm, strength 1.5 to 6, elongation 15 to 70, the former And the latter fiber has a potential shrinkage of 9/25 mm to 20/25 mm before heat treatment in the production method of the present invention (described later), and similarly, the dry fiber shrinkage ratio of the former fiber before heat treatment is 3% to 10%, The latter fiber dry heat shrinkage is 15% to 35%.

In particular, when referring to the dry heat shrinkage rate, when such other latent crimped composite fibers of the dry heat shrinkage rate are mixed at the mixing ratio, the detachable durability (at least 10 detachable times) of the mask can be secured. The elastic stretchable fiber which forms the earring part 12 by using the polyester-based crimped composite fiber of the said dry heat shrinkage rate which a wearer does not feel an ear pain or a discomfort within the range of the number of times, and is relatively high The inventors also found that the detachable durability of the mask can be maintained even if the unit weight of the nonwoven fabric is reduced to some extent.

As polyolefin crimped composite fiber, it is a parallel composite fiber of the brand name "EP" manufactured by Chisoh Corporation, polypropylene (melting temperature 180 degreeC), and a modified polypropylene (melting temperature 125 degreeC), and is dry heat before the said heat processing. A shrinkage ratio of about 6% to 7% can be suitably used, and examples of the polyester crimped composite fiber include, for example, the brand name "USW" manufactured by Toyoboseki Co., Ltd., polyester (melting temperature 230 ° C) and It is a parallel composite fiber of modified polyester (melting temperature of 125 ° C.), and a dry heat shrinkage ratio of about 33.7% can be suitably used before the heat treatment.

<Manufacturing method of earring part of mask>

First, 75% to 25% by weight of polyolefin-based latent crimped composite fiber and 25% to 75% by weight of polyester-based latent crimped composite fiber were placed on a mixed carding machine to form a fiber web having a unit weight of 80 g / m 2 to 130 g / m 2. Get Other needs and / or preferred requirements as the fibers to be used are those specified in the section &quot; earring portion of mask &quot;.

The fibers of the fibrous web are then entangled with each other by supporting the fibrous web with a support and treating it by spray water under a predetermined pressure from a plurality of fine orifices arranged in a constant pitch in the same direction across the width direction. Subsequently, the fiber web is dehydrated and dried. A well-known water flow entanglement apparatus (machine) can be used for this entanglement process. For example, among the methods for producing a nonwoven fabric disclosed in Japanese Patent Laid-Open No. 57-39268 regarding the applicant's development, those provided for the practice of the invention can be used. In general, the nonwoven fabric obtained by this method is relatively difficult to stretch in the longitudinal direction (machine direction) of the nonwoven fabric and extends in the width direction (direction intersecting the machine direction), even if the fibrous web can be said to be a so-called random web. It has the characteristic of being easy.

Furthermore, the elastic fiber nonwoven fabric is obtained by heat-processing the dried fiber web under the temperature which the fiber does not weld, and shrinking the fiber to express crimp.

The elastic stretchable fibrous nonwoven fabric thus obtained is cut in a suitable shape, for example, in the shape shown, and the length of the earring portion 12 to be obtained substantially matches the width direction of the nonwoven fabric so that the stretch stress at 50% elongation is 0.02. The earring portion 12 having N / mm 2 to 0.04 N / mm 2 and an initial elongation at 50% elongation of 2% to 10% is obtained.

<Example and Comparative Example>

Examples and comparative examples are as shown in Table 1.

Fiber formulation
(%) Unit weight
(g / m 2) 50% elongation stress
(N / mm &lt; 2 & Elongation (%) Example 1 EP75
USW25 100 0.015 7.1 Example 2 EP50
USW50 100 0.05 4.3 Example 3 EP25
USW75 100 0.033 8.6 Comparative Example 1 EP100 100 0.035 17.1 Comparative Example 2 USW100 100 0.038 1.4

The measurement of the elongation stress and the initial elongation rate was carried out using an autograph, and as shown in Fig. 3, the sample earring part of the mask made of the coating part and the earring part was set between the chucks (70 mm intervertebral distance), and the speed was 300 mm / min. The value at the time of shrinkage after 50% elongation was expressed as elongation stress and elongation rate.

Elongation was calculated | required by the following formula.

(Iii) "EP" in the table is a parallel latent crimped composite fiber manufactured by Chisso Corp., Ltd., of polypropylene (melting temperature 180 ° C.) and modified polypropylene (melting temperature 125 ° C.), with dry heat shrinkage of about 6% to 7%. In addition, in the table, "USW" is manufactured by Toyo Boseki Co., Ltd., and is a latent crimped composite fiber of polyester (melting temperature 230 ° C) and modified polyester (melting temperature 125 ° C), and dry heat The shrinkage percentage was about 33.7%, and these were used.

Since the earring portion of the disposable mask according to the present invention has the above-described configuration, the wearer does not feel pain or discomfort in the ear even when it is worn for a relatively long time, and accordingly, a predetermined mask holding force / strength stress over a long period of time. You can get a mask that can sustain. Moreover, the mask which exhibits the said effect can be easily manufactured by the manufacturing method of the earring part of a disposable mask which concerns on this invention.

Claims (5)

In the earring part of the disposable mask which has the coating part about the nose and the mouth of a wearer, and the earring part extended from both sides of the said coating part, The earring part is formed from the heat-sealing and elastically stretchable fiber nonwoven fabric. Earring part of a disposable mask comprising the following characteristics of a to d: a. Having a unit weight of 80 g / m 2 to 130 g / m 2; b. 75 wt% to 25 wt% of polyolefin crimped composite fiber and 25 wt% to 75 wt% of polyester crimped composite fiber, wherein the polyolefin crimped composite fiber and the polyester crimped composite fiber The relationship is the weight percent of the former fiber ≤ the weight percent of the latter fiber, both fibers having characteristics of 1 to 6 dtex fineness, fiber length 25 to 60 mm, strength 1.5 to 6, elongation 15 to 70, respectively; c. Mechanically entangle the polyolefin-based and polyester-based crimped composite fibers to maintain a nonwoven fabric shape; d. The stretch stress at 50% elongation is 0.033 N / mm 2, and the initial elongation at 50% elongation is 8.6%. delete delete Fabrication of the earring part of the disposable mask for joining the earring part formed of the heat sealable and elastic stretchable fiber nonwoven fabric by heat welding with respect to both sides of the coating part for the nose and the mouth of the wearer formed of the heat sealable fiber nonwoven fabric. A method for producing an earring part of a disposable mask comprising the following steps a to c: a. 75 to 25 wt% of polyolefin based crimped composite fiber and polyester based crimp consisting of a mixture of 75 to 25 wt% of polyolefin latent crimped composite fiber and 25 to 75 wt% of polyester latent crimped composite fiber It consists of a mixture of 25% to 75% by weight of the composite fiber, The relationship between the weight percentage of the polyolefin crimped composite fiber and the polyester crimped composite fiber is the weight% of the former fiber ≤ the weight% of the latter fiber, The fibers of both are 1 to 6 dtex fineness, fiber length 25 to 60 mm, strength 1.5 to 6, elongation 15 to 70, The fibers of both are 9 to 20/25 mm potential crimp before heat treatment, respectively The former fiber has a dry heat shrinkage of 3 to 10% before heat treatment, and the latter fiber has a dry heat shrinkage of 15 to 35% before heat treatment. By supporting a fiber web having a unit weight of 80 g / m 2 to 130 g / m 2 as a support, and treating the fiber web by spray water flow from orifices arranged at a constant pitch in the same direction across the width direction, Interlacing the fibers of the fibrous web with each other; b. Then heat treating the fibrous web to shrink the polyolefin-based latent crimped composite fiber to express crimp, and to contract the polyester-based latent crimped composite fiber to express crimp, thereby forming an elastic stretchable fiber nonwoven fabric; And c. Cutting the nonwoven fabric into an appropriate shape to obtain an earring having an elongation stress at 50% elongation of 0.033 N / mm 2 and an initial elongation at 50% elongation of 8.6%. The said earring part is a manufacturing method of the earring part of a disposable mask of Claim 4 obtained by cutting | disconnecting so that the said width direction in the said nonwoven fabric may match the longitudinal direction of the said earring part.

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