KR20220009701A - Method for manufacturing clothes for marine work using polypropylene - Google Patents

Abstract

A method for manufacturing marine workwear using polypropylene according to the present invention comprises: a union fabric manufacturing step for manufacturing a union fabric by using a polyester yarn as the warp, and a polypropylene yarn as the weft; a coating step for applying a functional coating agent to the union fabric and then drying the same; a joining step for cutting the union fabric that has completed the coating step into a predetermined shape, and performing seamless joining the union fabric using ultrasonic welding so as to allow the cut union fabric to form the predetermined shape; and a seam-sealing step for performing seam-sealing of a joint portion formed on the union fabric that has completed the joining step.

Description

Method for manufacturing clothes for marine work using polypropylene

The present invention relates to a method of manufacturing clothes for marine work using polypropylene for manufacturing clothes for marine work that can satisfy environmental compatibility, work performance, and protective functionality by using a polyester yarn and a polypropylene yarn.

Work clothes should have body protection for work efficiency improvement and safety, a sense of belonging, and comfort, and should be designed so that various complex factors such as environmental suitability, work performance, protective function, and comfort are simultaneously satisfied.

The wearing purpose required for work clothes includes functionality, aesthetics, and symbolism, and functional factors for comfortable wearing work clothes include work clothes characteristics, work operation characteristics, worker characteristics, and environmental conditions. Among them, the characteristics of work clothes are more important than anything else in order to improve work efficiency while efficiently maintaining a comfortable fit, and to be safe and not to cause health disorders. In order to do this, research is needed to select the optimal fabric by analyzing the physical properties according to various tissue patterns.

Korean Patent Publication No. 10-2013-0051522 (2013.05.21)

The method for manufacturing clothes for marine work using polypropylene according to the present invention has the effect of providing an optimal knitting fabric with maximized mechanical strength and water resistance to be suitable for a marine environment.

The method for manufacturing clothes for marine work using polypropylene according to the present invention includes a cross-woven fabric manufacturing step of using a polyester yarn as a warp yarn and a polypropylene yarn as a weft yarn to produce a cross-woven fabric, and a functional coating agent is applied to the cross-woven fabric and then dried After the coating step, and after the coating step, the cross-woven fabric is cut into a predetermined shape, and the cut cross-woven fabric is made into a predetermined shape by using ultrasonic welding, a bonding step of seamless bonding, and the bonding step to the cross-woven fabric It characterized in that it comprises a seam sealing step of seam sealing the formed junction portion.

In addition, the cross fabric, using the polyester yarn and polypropylene yarn as a drawing process (DTY, DrawTextured Yarn), the warp density of the polyester yarn is 110 to 120 / inch, the weft density of the polypropylene yarn It is characterized in that 60 to 70 pieces/inch.

In addition, in the bonding step, the frequency range of the ultrasonic waves used during ultrasonic welding is characterized in that 0.47 to 0.53 kHz.

According to the present invention, the method for manufacturing clothes for seamless maritime work uses polyester yarn and polypropylene yarn with draw textured yarn (DTY) to weave a knitted fabric, thereby maximizing mechanical strength and water resistance to suit the marine environment. There is an effect that can provide a teaching fabric.

In addition, during the bonding step, the seam is not sewn on the edge of the garment for sea work, but is joined through ultrasonic welding, and at the same time, the joint is seam-sealed through the seam sealing step to form a more robust sealing structure. It has the effect of securing domestic water supply by compensating for the disadvantages of not being able to do so.

1 is a flowchart of a method for manufacturing clothes for marine work using polypropylene according to the present invention.
Figure 2 is a photograph showing the organizational structure of the fabric produced according to the present invention.
Figure 3 is a graph measuring the peel strength of the fabric produced according to the present invention.

Hereinafter, the technical idea of the present invention will be described in more detail with reference to the accompanying drawings.

Since the accompanying drawings are merely examples shown in order to explain the technical idea of the present invention in more detail, the technical idea of the present invention is not limited to the form of the accompanying drawings.

1 is a flowchart of a method for manufacturing a garment for marine work using polypropylene according to the present invention, and FIG. 2 is a photograph showing the organizational structure of a textile fabric manufactured according to the present invention.

As shown in Figure 1, the method for manufacturing clothes for marine work using polypropylene according to the present invention includes a fabric manufacturing step (S100), a coating step (S200), a bonding step (S300) and a seam sealing step (S400). .

First, the knitting fabric manufacturing step (S100) is a step of using a polyester yarn as a warp yarn, and using a polypropylene yarn as a weft yarn to produce a cross fabric.

It is preferable to use the polyester yarn and polypropylene yarn as a draw textured yarn (DTY) for the cross fabric.

In the case of the drawing process, it is twisted again after stretching, and the setting is made in the process of twisting and untwisting the yarn, so it swells up and maintains its shape even under conditions such as heat or cooling. .

Accordingly, in the present invention, it is possible to secure tensile strength and tensile elongation suitable for use as a fabric for marine work clothes by using a stretching process.

In addition, as shown in FIG. 2 , the woven fabric is preferably woven in the form of a Rip Stop tissue. The fabric of the ripstop structure is characterized by being strong against rupture and tearing in a checkerboard shape, and even if it is torn, the tear does not spread and there is no damage to the surrounding area. It is a form of weaving with

And, the warp density of the polyester yarn when weaving the cross-woven fabric is 110 to 120 / inch, and the polypropylene yarn is woven so that the weft density of the polypropylene yarn is 60 to 70 / inch, in this case, the weight of the woven cross fabric is 140 It is preferable to be to 150 g/m 2 .

Specifically, when the warp density of the yarn of the polyester is less than 110 yarns/inch, and the weft density of the polypropylene yarn is less than 60 yarns/inch, it is difficult to secure the water repellency of the cross-woven material due to the large pores, and the polyester When the warp density of the yarn exceeds 120 yarns / inch, and the weft density of the polypropylene yarn exceeds 70 yarns / inch, the weaving density is high, and the weight of the knitted fabric increases, thereby causing a problem in that the marine clothing becomes heavy.

In addition, if the weight of the knitted fabric is less than 140g/m2, there is a concern that the mechanical properties are somewhat deteriorated due to the thin thickness. Occurs.

The warp density, weft density, and weight of the knitted fabric as described above have the minimum weight so that the applicant can fit the fabric of the marine workwear garment after several manufactures, and at the same time have sufficient tensile strength, tear strength and tensile elongation. As the density and weight were derived, the related contents will be described in detail in Experimental Example 1 below.

Next, the coating step (S200) is performed. The coating step (S200) is a step of drying after applying a functional coating agent to the fabric.

At this time, the functional coating agent is applied to impart various functions to the fabric, and it is preferable to apply a coating agent such as polyurethane, acrylic, or silicone according to the type and purpose of use of the fabric and then dry it through a dryer.

In the present invention, it is most preferable to apply a polyurethane coating agent in order to maximize the mechanical properties of the fabric, particularly the tensile strength.

In addition, it is possible to secure water repellency and moisture permeability by making a water-repellent film on the upper surface of the knitted fabric during coating of the polyurethane coating agent.

When the polyurethane coating agent is applied, it is preferable to dry it for 1 minute at a temperature of 70 to 90 ° C.

When drying for less than 1 minute at a temperature of less than 70 ℃, the polyurethane coating is difficult to adhere to the fabric, and if dried for more than 1 minute at a temperature exceeding 90 ℃, because there is a risk of damage to the fabric.

Next, a bonding step (S300) is performed, and the bonding step (S300) cuts the cross fabric that has undergone the coating step (S200) into a predetermined shape, and uses ultrasonic welding to form the cut cross fabric into a predetermined shape. This is the joining step.

Ultrasonic welding is a method of welding with pressure and ultrasonic energy without applying heat, and can solve the problem of hardening of the adhesive surface due to heat welding. It has excellent peel strength and high productivity.

In addition, the ultrasonic welding method can secure water resistance by compensating for the disadvantage of not being waterproof in the existing seams, and also has the advantage of less change in physical properties after washing the moisture-permeable waterproof fabric.

In the case of ultrasonic welding, it is preferable that the frequency range (ie, welding strength) of the ultrasonic waves used is 0.47 to 0.53 kHz.

Specifically, when the frequency of the ultrasonic wave is less than 0.47 kHz, sufficient bonding between the fabrics is not made, so it is not possible to secure peel strength and water resistance suitable for use as marine work clothes, and the frequency of the ultrasonic wave is more than 0.53 kHz In this case, there is a risk that the fabric may be damaged and the peel strength and water resistance may be lowered, and this will be described in more detail in Experimental Example 2 below.

Next, a seam sealing step (S400) is performed, and the seam sealing step (S400) is a step of seam sealing the joint portion formed in the cross-woven fabric that has undergone the joining step (S300).

That is, after bonding the cut cross-woven fabric by ultrasonic welding, it is a step of closing the bonding area with a seam sealing tape so as to maintain peel strength and water resistance of the bonding area (ie, the bonding surface).

The finishing with the seam sealing tape is preferably done using a seam sealing machine under the conditions of a temperature of 100 to 300° C. and a pressure of 10 to 100 psi, but is not limited thereto. At this time, as a condition for finishing with seam sealing tape, if the temperature is less than 100 ℃, there is a problem that the polyurethane adhesive is not sufficiently melted and the adhesive strength is lowered. There is a problem that leaks out or the moisture-permeable waterproof fabric and seam sealing tape are thermally damaged. In addition, when the pressure is less than 10psi, there is a problem that the moisture-permeable waterproof fabric and the seam sealing tape are pushed or slippery to each other, and when the pressure exceeds 100psi, the moisture-permeable waterproof fabric is damaged due to strong pressure or polyurethane There is a problem that the adhesive melts and flows out of the seam sealing tape.

That is, the present invention performs bonding through ultrasonic welding without sewing the edges of clothing for marine work, and at the same time performs seam sealing to form a more robust sealing structure to secure excellent wear strength, peel strength and water resistance. can be improved

The peel strength of the knitted fabric prepared as described above was measured to be a maximum of 5.258 kgf / cm, which proves that it has excellent peel strength as it satisfies the peel strength of 1.0 kgf / cm among the fabric requirements of the clothing industry, which is shown in FIG. see

3 is a graph measuring the peel strength of the cross-woven fabric manufactured according to the present invention, and details thereof will be described in detail in Experimental Example 2 below.

In the case of peel strength, it was measured according to KS K 0531:2006, the peeling speed was fixed at 300 mm/min, and peeling was performed in the longitudinal direction of the fusion using a constant-speed tensile machine.

<Experimental Example 1>

In this Experimental Example 1, an experiment was conducted to measure the weight of the knitted fabric by varying the warp and weft yarn types, warp density and weft yarn density.

Table 1 below shows examples and various comparative examples of the present invention.

division yarn type gradient density
(bones/inch) weft density
(bones/inch) weight
(g/m2) slope weft Comparative Example 1 NA 160/96 FD NA 160/96 FD 106 84 131 Comparative Example 2 N 330D SD ATY N 330D SD ATY 68 50 200 Comparative Example 3 NA 66 340D FD NA 66 340D FD 6262 50 199 Comparative Example 4 N 160 FD ATY N 160 FD ATY 101 66 125 Comparative Example 5 N66 160 FD ATY N66 160 FD ATY 96 66 165 Example Polypropylene 150/48 SD Polypropylene 150/48 SD 118 66 144

Specifically, in the case of a textile fabric used as a fabric for marine work clothes, it is preferable that the weight be 140 to 150 g/m 2 . Specifically, if the weight of the knitted fabric is less than 140g/m2, there is a concern that the mechanical properties may be slightly deteriorated due to the thin thickness. As a result of measuring the weight of the fabric, as shown in Table 1 above, the weight of the fabric according to the embodiment was measured to be 144 g/m2, which is a weight range that can secure physical properties suitable for use as clothing for marine work. It can be confirmed that it belongs to 140 to 150 g/m 2 .

In conclusion, the fabric according to the embodiment can minimize the weight of the fabric and at the same time satisfy the requirements of tensile strength, tensile elongation and tear strength of the fabric for industrial clothing, so it is sufficiently suitable for use in clothing for marine work. Able to know.

<Experimental Example 2>

And, in this Experimental Example 2, an experiment was conducted to measure the peel strength of the knitted fabric according to the frequency domain (ie, fusion strength) by varying the frequency range of the ultrasonic waves used during ultrasonic welding in the bonding step (S300).

Table 2 below is the same as the samples of Examples and Comparative Examples of Table 1, and was carried out under the same welding speed and welding pressure during the bonding step (S300). See FIG. 3 for the results.

division Ultrasonic frequency (kHz, fusion strength) Peel strength (kgf/cm) B-1 (Comparative Example 1) 0.47 3.487 B-2 (Comparative Example 2) 0.47 5.258 B-3 (Comparative Example 3) 0.50 3.636 B-4 (Comparative Example 4) 0.50 2.387 B-5 (Comparative Example 5) 0.53 2.207 B-6 (Example) 0.50 1.292

As a result of measuring the peel strength of the cross fabric according to Experimental Example 2, the maximum peel strength was 5.258 kgf / cm and the minimum peel strength was measured to be 1.292 kgf / cm, which satisfies the peel strength 1.0 kgf / cm among the fabric requirements for industrial clothing. Accordingly, it was verified that the Examples and Comparative Examples had sufficient peel strength for use as garments for marine work.

That is, as in Experimental Example 2, when the frequency range of ultrasonic waves used during ultrasonic welding is set to 0.47 to 0.53 kHz, peel strength of 1.0 kgf / cm among the fabric requirements for industrial clothing is satisfied. Not only was it proven to have sufficient peel strength, but there was no damage to the fabric.

Accordingly, the method for manufacturing clothes for marine work using polypropylene according to the present invention can minimize the weight to be suitable for the marine environment, and at the same time secure excellent mechanical properties to satisfy the environmental suitability, work performance and protective function. There is an advantage that there is

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention as claimed in the claims.

Claims (3)

A knitting fabric manufacturing step of using a polyester yarn as a warp yarn, and using a polypropylene yarn as a weft yarn to produce a knitted fabric;
A coating step of applying a functional coating agent to the fabric and then drying;
After the coating step, a bonding step of cutting the cross-woven fabric into a predetermined shape, and using ultrasonic welding so that the cut cross-woven fabric forms a predetermined shape, seamless bonding; and
Seam sealing step of seam-sealing the seam-sealing process of the joint portion formed on the cross-woven fabric that has undergone the joining step;
The method of claim 1,
The teaching fabric is
The polyester yarn and polypropylene yarn are used as a drawing processing yarn (DTY, DrawTextured Yarn), the warp density of the polyester yarn is 110 to 120 yarns/inch, and the weft density of the polypropylene yarn is 60 to 70 yarns/inch A method of manufacturing clothing for marine work using polypropylene, characterized in that inches.
The method of claim 1,
In the bonding step,
A method of manufacturing clothes for marine work using polypropylene, characterized in that the frequency range of the ultrasonic waves used during ultrasonic welding is 0.47 to 0.53 kHz.

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