TWI821846B - Cut-resistant polyethylene yarn, cut-resistant fabric and protective product - Google Patents

Abstract

Provided are a cut-resistant polyethylene yarn, a cut-resistant fabric and a protective product, and more particularly, a cut-resistant polyethylene yarn which allows manufacture of a product having excellent cut resistance and providing excellent wearability.

Description

Cut-resistant polyethylene yarns, cut-resistant fabrics and protective products

The following disclosure relates to a cut-resistant polyethylene (PE) yarn, and more specifically, to a yarn capable of producing excellent cut resistance and excellent wear resistance. ) both products are cut-resistant polyethylene yarns.

To protect the human body from lethal weapons or sharp cutting tools such as knives, people working in high-risk industrial areas (such as metal and glass processing shops and butcher shops) or people working in safety and disaster response areas (such as police, Soldiers or firefighters) will wear cut-resistant gloves or cut-resistant clothing.

Generally speaking, as a means of imparting cut resistance, products formed of high-strength spun yarn (such as aromatic polyamide fiber) have been developed, but they do not have sufficient cut resistance for high-strength applications. Places for risk groups. At the same time, various products using metal yarns have also been developed, but they lack flexibility and may not be practically applicable to workplaces where workers' hands are often used.

Therefore, as disclosed in Japanese Patent Publication No. 2002-180324, a glove using polyethylene yarn with high elastic modulus and strength has been proposed. However, its usability is poor because its cut resistance is not good enough to be substantially used in industrial fields with high-risk groups.

In addition, when a polyethylene yarn developed with only emphasis on strength improvement is manufactured for protecting products and used, it is prone to lint, and therefore it is difficult to reuse the yarn for a long time.

[Related technical documents]

[Patent document]

(Patent document 1): Japanese Patent Publication No. 2002-180324

Embodiments of the present invention aim to provide a polyethylene yarn with excellent cut resistance and improved wear resistance.

In a general aspect, there is provided a cut-resistant polyethylene yarn having the following properties: In a plot of storage modulus (G') as a function of angular frequency (ω), having a storage modulus of 10 Pascal to 100 Pascal at an angular frequency of 1 rad/s (rad/s) and a storage modulus of 100 Pascal to 1000 Pascal at an angular frequency of 1 rad/s; and In the graph of tan δ changing according to the angular frequency (ω), there is a tan δ of 9 or more when the angular frequency is 0.1 radians per second.

In the cut-resistant polyethylene yarn according to an exemplary embodiment of the present invention, the loss modulus (G″) changes according to the angular frequency (ω) In the graph of , the cut-resistant polyethylene yarn can have a loss modulus of 100 Pascal to 700 Pascal at an angular frequency of 0.1 radians per second, and in the region of 0.25 radians per second to 0.5 radians per second. has a point with a loss modulus of 1000 Pa.

In the cut-resistant polyethylene yarn according to an exemplary embodiment of the present invention, in the graph of complex viscosity (η*) according to the angular frequency (ω), the cut-resistant polyethylene yarn It can have 3000 Pa when the angular frequency is 0.1 radians per second. seconds (Pa.s) to 6000 Pa. second complex viscosity with an average gradient from -1000 to -300 over the angular frequency range from 0.1 radians per second to 1 radians per second.

In the cut-resistant polyethylene yarn according to an exemplary embodiment of the present invention, the polyethylene yarn may have a fineness of 1 denier per filament (DPF) to 3 DPF.

In the cut-resistant polyethylene yarn according to an exemplary embodiment of the present invention, in a graph of phase angle according to multiple shear modulus (G*), The phase angle may be 75° to 90° when the multiple shear modulus (G*) is 350 Pascal to 1000 Pascal.

In the cut-resistant polyethylene yarn according to an exemplary embodiment of the present invention, the number of fluff occurrences may be 20 pieces (EA)/50,000 meters (m) or less than 20 pieces/50,000 meters (m).

In another general aspect, a cut-resistant fabric includes the cut-resistant polyethylene yarns set forth above.

In the cut-resistant fabric according to an exemplary embodiment of the present invention, the fabric may have a resistance of 5.5 Newtons (N) as measured according to the standard of ISO13997:1999 Or greater than 5.5 Newton (N) cutting resistance.

In yet another general aspect, a protective product includes the cut-resistant fabric set forth above.

The protective product according to an exemplary embodiment of the present invention may be a cut-resistant glove.

Since the cut-resistant polyethylene yarn according to the present invention has excellent cut resistance, it enables the manufacture of fiber products that can be substantially used in industrial and disaster disposal sites for high-risk groups.

In addition, the cut-resistant polyethylene yarn according to the present invention enables the manufacture of products with high wear resistance.

G’: storage modulus

G”: loss modulus

G*: multiple shear modulus

η*: complex viscosity

ω: angular frequency

1 to 5 are graphs showing results of measuring rheological properties of cut-resistant polyethylene yarns according to exemplary embodiments of the present invention.

Unless otherwise defined, technical terms and scientific terms used in this specification have general meanings understood by those skilled in the art of the present invention, and will not obscure the gist of the present invention in the following description and drawings. Unclearly known functions and configurations will be described in detail.

Additionally, unless the context indicates otherwise, the singular forms used in this specification are intended to include the plural forms as well.

In addition, units used in this specification that are not specifically mentioned are by weight, and as an example, unless otherwise defined, units of % or ratio refer to weight % (wt%) or weight ratio. , and weight% refers to the weight% of any component in the total composition.

In addition, the numerical range used in this specification includes all values within the range, including the lower limit and upper limit, increments derived from the form and span logic in the defined range, and all double limited values. ) and all possible combinations of upper and lower limits in numerical ranges defined in different forms. Unless otherwise defined in the specification of the present invention, values that may fall outside the numerical range due to experimental error or rounding of values are also included in the defined numerical range.

The term "comprise" in this specification means something like "is/are provided", "contain", "have" or "is/are characterized" An open statement of equivalent meanings of terms, and does not exclude components, materials, or processes not further listed.

Cut resistance means the durability to resist being cut by the edge of a knife or an object with a sharp part (e.g., a knife edge), and is used to protect the human body from lethal weapons or sharp cutting tools such as knives, in high-risk industrial areas (e.g., metal Cut-resistant gloves or cut-resistant clothing are worn by people who work in glass shops and butcher shops) or in safety and disaster management fields (such as police, military or firefighters).

Traditionally, cut-resistant fiber products using polyethylene yarns with high elastic modulus and strength have been developed, but their availability is poor because their cut resistance is not good enough to be substantially used in industrial fields for high-risk groups. .

In addition, since products made from polyethylene yarns developed solely focusing on strength improvement have low wear resistance, they are prone to lint, and therefore, it is difficult to reuse the product for a long time.

Therefore, the present applicant has concentrated on research for a long time in order to develop polyethylene yarns with excellent cut resistance and wear resistance, and as a result, found that polyethylene yarns with specific rheological properties enable the production of polyethylene yarns with extremely high resistance to cutting and wear. It is a product that has both good cutting resistance and excellent wear resistance, and therefore, in-depth research was carried out to complete the present invention.

Polyethylene yarn in this specification refers to monofilament and multifilament produced by using polyethylene fragments as raw materials through processes such as spinning and drawing. As an example, the polyethylene yarn may include 40 to 500 filaments each having a fineness of 1 to 3 denier, and may have an overall fineness of 100 to 1,000 denier.

Rheological properties in this specification refer to storage modulus (G'), loss modulus (G"), tan δ, complex viscosity (η*) and phase angle (°), and unless otherwise defined in this specification, Otherwise the rheological properties can be measured using a DHR-2 (Thermal Analysis (TA) Instrument). The geometry used in the measurement is plate-plate (parallel plate) , PP)), its measurement depends on the storage modulus (G'), loss modulus (G"), tanδ, complex viscosity (η*) and phase angle of the angular velocity change. Unless otherwise defined, the rheological properties can be measured under a nitrogen atmosphere at a temperature of 250°C, and the measurement specifications (sample size) can be 25 mm diameter, 1.0 mm gap point, and 10% strain.

The cut-resistant polyethylene yarn of the present invention may have the following properties: In a graph of storage modulus (G') as a function of angular frequency (ω), it has an angular frequency of 0.1 radians per second, ranging from 10 Pa to has a storage modulus of 100 Pa and has a storage modulus of 100 Pa to 1000 Pa at an angular frequency of 1 radians per second; and in the plot of tan δ as a function of the angular frequency (ω), at the angular frequency ( ω) is 0.1 radians per second with a tan delta of 9 or greater. Such polyethylene yarns can be manufactured into products with excellent wear resistance and excellent cut resistance.

The cut resistance of a product comprising a polyethylene yarn according to the present invention can be determined not only by the strength of the polyethylene yarn, but also by the slippage of the polyethylene yarn (i.e. when sharp tools such as The characteristic of the tool sliding along the surface without getting stuck on the polyethylene yarn) and the rolling of the yarn (i.e. when a sharp tool, such as the blade of a knife) passes over the yarn Determined by the characteristic of the yarn twisting or crimping about the longitudinal axis of the yarn).

The polyethylene yarn according to the present invention has the above ranges in the graphs of storage modulus and tan δ as a function of angular frequency, thereby enabling the manufacture of products with excellent slip and rolling characteristics and with excellent cut resistance. .

Specifically, in a plot of storage modulus (G') as a function of angular frequency (ω), the storage modulus may be 20 Pascal to 80 Pascal at an angular frequency of 0.1 radians per second, and more specifically, 30 Pa to 50 Pa. Here, the storage modulus may have a positive (+) average gradient. Specifically, the storage modulus may have a positive (+) average gradient in a region of angular frequency from 0.1 radians per second to 1000 radians per second. Yarns with such physical properties can exhibit sufficient elasticity to be cut resistant and have relatively excellent strength. Spend. Specifically, in the graph of storage modulus as a function of angular frequency, when the angular frequency (ω) and storage modulus (G') values are converted into logarithmic values, the storage modulus (log G') The average gradient may be from 0.9 to 1.6, specifically from 1.1 to 1.5 in the range of angular frequency (log ω) from 0 radians per second to 1 radians per second.

When the storage modulus is higher than the above range, the strength improves, but the stiffness also increases, and therefore, when the fabric is made by weaving or knitting, the fabric is stiff, making it difficult to process the fabric into a desired product. And the product wearer may feel uncomfortable.

Here, in the graph of tan δ varying according to the angular frequency (ω), tan δ may have a negative (-) average gradient, and more specifically, may be in a region of 0.1 radians per second to 1000 radians per second. There is a negative (-) average gradient in the segment. That is, in the graph of tan δ changing according to the angular frequency (ω), the polyethylene yarn according to the present invention has a gradient value with a relatively high absolute value and does not form an inflection point unlike other polyethylenes. point). This means that such polyethylene yarns exhibit relatively high viscosity compared to elasticity. Specifically, it means that even under low shear stress, entanglements between polymer chains or gels are easily aligned in the flow direction, and therefore, the entanglements between polymer chains or gels in the polyethylene yarn There is virtually no tangle between them. Since polyethylene yarns have such rheological properties, the yarns have essentially no gel or essentially very little gel, thereby preventing the formation of lint during drawing.

Here, in the graph of tan δ varying according to the angular frequency (ω), the yarn may have a tan delta of 9 or more and less than 9 when the angular frequency is 0.1 radians per second. 15. Specifically, tan δ is 9 to 12, but is not limited to this.

When the tan δ value is 1, the angular frequency may be from 200 radians per second to 500 radians per second, specifically from 250 radians per second to 400 radians per second. Since the range of angular frequency at tan δ value 1 is relatively large, the viscosity is better than that of the polyethylene yarn commonly used in this technology, and the polyethylene yarn can be between the polyethylene polymer chains. There is virtually no tangle between them and excellent polymer chain arrangement. Because such yarns have excellent alignment between polymer chains, they enable the production of fabrics with better slip and rolling properties. Fabrics made from such yarns have excellent cut resistance, thereby preventing pilling (where lint occurs even when repeated external force is applied by the blade of a knife or a sharp object) on the fabric. damaged.

In a graph of loss modulus (G") as a function of angular frequency (ω), the polyethylene yarn can have an angular frequency of 0.1 radians per second from 100 to 700 Pa, specifically 200 Pa to a loss modulus of 500 Pa, and can show a point with a loss modulus of 1000 Pa in the angular frequency range from 0.25 rad per second to 0.5 rad per second.

In addition, in the graph of the loss modulus changing according to the angular frequency, when the angular frequency (ω) and loss modulus (G”) values are converted into logarithmic values, when the angular frequency (log ω) is 0 radians, The average gradient in loss modulus (log G”) can be from 0.75 to 0.9 over the range from seconds to 1 rad per second.

In addition, in the graph of the complex viscosity (η*) changing according to the angular frequency (ω), when the angular frequency is 0.1 radians per second, the complex viscosity can be 3000 Pa. seconds to 6000 Pa. seconds, specifically 3700 Pa. seconds to 5000 Pa. seconds, and the angular frequency is In the section from 0.1 radians per second to 1 radians per second, the average gradient can be -1000 to -300, specifically -800 to -500.

In addition, in the graph of the phase angle (°) as a function of the multiple shear modulus (G*), the phase angle can be 60° when the multiple shear modulus (G*) is 350 Pa to 1000 Pa. to 90°, specifically 75° to 90°.

By having such a loss modulus and complex viscosity, the present invention can have a melt viscosity that enables easy melt spinning and can suppress defects caused by the spinning process.

The polyethylene yarn according to the invention may have a weight of from 80,000 g/mol to 180,000 g/mol, specifically from 100,000 g/mol to 170,000 g/mol and more specifically from 120,000 g/mol to 160,000 g/mol. The weight average molecular weight (Mw) of the ear.

In addition, the polyethylene yarn may be a high-density polyethylene (high-density polyethylene) having a density of 0.941 g/cm3 to 0.965 g/cm3 and a crystallinity of 55% to 85%, preferably 60% to 85%. density polyethylene (HDPE).

In addition, the polyethylene yarn may have a polydispersity index (PDI) of greater than 5 and less than 9. Polydispersity index (PDI) is the ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) (Mw/Mn), and is also known as molecular weight distribution index (MWD). When the PDI is less than 5, the flowability is not good due to the relatively narrow molecular weight distribution, and the processability during melt extrusion is poor, resulting in thread trimming due to uneven discharge. . On the contrary, when When PDI is greater than 9, due to the large molecular weight distribution, the melt fluidity and processability during melt extrusion are better, but it contains too much low molecular weight polyethylene, which may reduce the stretch of the final polyethylene yarn. tensile strength.

Such polyethylene yarn of the present invention may have a tensile strength of 3.5 to 8.5 g/denier, a tensile modulus of 15 to 80 g/denier, and Elongation at break (elongation at break) of 14% to 55%. When the tensile strength is greater than 8.5 g/denier, the tensile modulus is greater than 80 g/denier, or the elongation at break is less than 14%, the polyethylene yarn has poor wearability, and the fabric made using the yarn Too stiff, causing discomfort to the user. On the contrary, when the tensile strength is less than 3.5 g/denier, the tensile modulus is less than 15 g/denier, or the elongation at break is greater than 55%, when the user continues to use the fabric, the fabric made from polyethylene yarn will Lints form on the fabric.

The polyethylene yarn of the present invention may have a circular cross-section or a non-circular cross-section, but preferably has a circular cross-section to achieve excellent slip properties.

In addition, the polyethylene yarn of the present invention may have a strength of 11 g/denier or more, in particular 13 g/denier or more than 13 g/denier, such that manufacturing using said yarn of products have a cutting force of 5 or greater.

The method of manufacturing the yarn of the present invention is not limited as long as it is a method of manufacturing the yarn using polyethylene known in the art. As a specific example, the yarn can be produced by including the following steps: melting polyethylene chips to obtain a polyethylene melt; extruding the polyethylene melt through a spinneret having a plurality of nozzle holes; cooling Multiple filaments formed when the polyethylene melt is discharged from the nozzle hole; the multiple filaments are The cooled filaments are sizing to form a multifilament yarn; the multifilament yarn is drawn for a total drawing ratio of 5 to 20 times, and the drawn multifilament yarn is heat setting of silk yarns; and winding of drawn multifilament yarns. Here, the drawing step is performed by multi-stage drawing, and the relaxation ratio of the last stage drawing in the multi-stage drawing may be 3% to 8% or Less than 8%, but not limited to this. The relaxation ratio at the last stage of drawing refers to the relaxation ratio at the drawing finally performed after the drawing and before the winding.

The polyethylene melt is transported to a spinning head with multiple nozzle holes by a screw in the extruder, and is then extruded through the nozzle holes. The number of holes in the spinning head can be set depending on the denier per filament (DPF) and the total fineness of the yarn to be produced. As a specific example, to produce yarns of 1 DPF to 3 DPF with an overall fineness of 100 denier to 1,000 denier, the spin head 200 may have 40 to 500 nozzle holes.

The melting process in the extruder and the extrusion process by the spinning head can be performed at 150°C to 315°C, preferably at 250°C to 315°C, and more preferably at 260°C to 290°C. When the spinning temperature is lower than 150°C, the polyethylene chips cannot be melted uniformly due to the low spinning temperature, so spinning may be difficult. However, when the spinning temperature is higher than 315° C., polyethylene undergoes thermal decomposition, so it may be difficult to achieve high strength expression.

The filament can be cooled by air cooling. For example, cooling air with a wind speed of 0.2 m/s to 1 m/s can be used to cool the filaments at 15°C to 40°C. When the cooling temperature is lower than 15°C, due to insufficient elongation due to supercooling, breakage may occur in the subsequent drawing process, and when the cooling temperature is higher than 40°C When used, the fineness deviation between filaments increases due to uneven curing, and breakage may occur during the drawing process.

Before forming the multifilament yarn, an oiling process of applying an oil agent to the cooled filaments using an oil roller (OR) or an oil jet may be further performed. The oiling step can be performed by a metered oiling (MO) method.

In addition, before the multifilament yarn is wound on the winding machine, an interlacing process by an interlacing device can be further performed to improve the sizing and weaving of the polyethylene yarn.

Polyethylene yarns produced by the method are braided or braided to produce cut-resistant fabrics.

Specifically, the polyethylene fabric according to the present invention can be knitted into covered yarn. The covering yarn is not limited as long as it contains the polyethylene yarn of the present invention, but as an example, it can be made by including the polyethylene yarn of the present invention, a polyurethane yarn spirally surrounding the polyethylene yarn, Acid ester yarn (for example, spandex) and polyamide yarn (for example, nylon 6 (nylon 6) or nylon 66 (nylon 66)) spirally wrapped around the polyethylene yarn to form. Depending on the nature of the desired product, polyester yarns (eg, polyethylene terephthalate (PET) yarns) may be included instead of polyamide yarns.

Here, the polyethylene yarn may have a weight of 45% to 85% of the total weight of the covering yarn, and the polyurethane yarn may have a weight of 5% to 85% of the total weight of the covering yarn. 30% by weight, and the polyamide or polyester yarn may have a weight of 5% to 30% of the total weight of the covering yarn, but is not limited thereto.

Meanwhile, the fabric according to the present invention may be a woven fabric or a knitted fabric having a weight per unit area (ie, surface density) of 150 to 800 g/m2. When the fabric has a surface density of less than 150 g/m², the fabric is not dense enough and there are many pores in the fabric, and these pores will reduce the cut resistance of the fabric. However, when the fabric has a surface density greater than 800 g/m2, since the structure of the fabric is too dense, the fabric is very stiff, causing problems with the user's touch, and causing problems in use due to its high weight.

Such fabrics can be processed into products requiring excellent cut resistance. The product can be any traditional fiber product, but preferably it can be a protective glove or protective clothing used to perform a protective function on the human body.

The protective product of the present invention has excellent cutting resistance with a cutting load (cut load) of 5.5 Newton (N) or greater than 5.5 Newton (N), more preferably 5.6 Newton (N) to 9 Newton (N), and also has The stiffness is 5 grams or less, preferably 2 to 5 grams, thereby demonstrating excellent wearability.

In the following, the present disclosure will be explained in more detail through the following examples. However, the following exemplary embodiments are merely references for elaborating the present invention in detail, and the present invention is not limited thereto and may be implemented in various forms.

In addition, unless otherwise defined, all technical terms and scientific terms have the same meaning as commonly understood by those skilled in the art. The terminology used herein is used only to effectively describe specific exemplary embodiments, and It is not intended to limit the invention. Furthermore, unless otherwise stated, the units of added materials herein may be weight %.

<Measurement of yarn rheological properties>

Rheological properties were measured using a DHR-2 (TA Instruments), and the geometry used in the measurements was plate-to-plate (parallel plate, PP) measurements of the storage modulus (G) as a function of angular velocity changes '), loss modulus (G"), tan δ, complex viscosity (η*) and phase angle (°). The measurements were performed under a nitrogen atmosphere at a temperature of 250°C and with a diameter of 25 mm and a gap The sample dimensions were measured at a point of 1.0 mm and a strain of 10%.

Graphs of the results of measuring the rheological properties of Example 1 and Comparative Example 1 are shown in Figures 1 to 5 below.

Specifically, Figure 1 shows the results of measuring the storage modulus (G'), Figure 2 shows the results of measuring the loss modulus (G"), Figure 3 shows the results of measuring tan δ, and Figure 4 shows The results of measuring the complex viscosity (eta*), and FIG. 5 shows the results of measuring the phase angle (°) of Example 1 and Comparative Example 1.

[Measuring the physical properties of protective gloves]

*Cut resistance

The cut resistance of the protective gloves was measured according to the specifications of ISO 13997:1999.

*Stiffness (grams)

The sample (width: 60 mm, vertical: 60 mm) was removed from the palm part of the protective glove and measured according to Chapter 38 of American Society for Testing Materials (ASTM) D885/D885M-10a (2014). Describe the stiffness of the sample. The measuring device is as follows:

(i) Constant rate of extension (CRE) tensile testing machine (Model: INSTRON 3343)

(ii) Loading Cell, 2 kilonewtons (N) [200 kilograms of force]

(iii) Specimen Holder: Specimen Holder specified in Chapter 38.4.3

(iv) Specimen Depressor: Specimen Depressor specified in Chapter 38.4.4.

Specifically, the sample is placed in the center of the sample holder so that the outside glove side of the sample is facing up and the inside glove side of the sample is facing down, with one side adjacent to the glove fingers and the opposite side (i.e. , the side adjacent to the wrist of the glove) is directly supported by the sample holder. Keep the sample on a flat platform without bending. At this time, the distance between the sample support part of the sample holder and the pressing part of the sample press is 5 mm. Subsequently, the sample holder was raised to 15 mm while allowing the sample press to remain stationary to measure the maximum tension.

*Evaluate wear resistance

The wear resistance of protective gloves was measured according to the specifications of ASTM-D 3884. A Martindale wear resistance meter was used as an evaluation instrument. The rubbing cloth used at this time was 320 grit (Cw) sandpaper and the applied load was 500 grams.

<Example 1>

Made consisting of 240 filaments and having a total fineness of 400 denier Polyethylene multifilament interwoven yarn.

Specifically, polyethylene chips are added to an extruder and melted. The polyethylene melt was extruded through a spinneret with 240 nozzle holes. The filaments formed by being discharged from the nozzle holes of the spinning head are cooled in the cooling unit and sized into multifilament yarns by a sizer. Subsequently, the multifilament yarn is drawn in a drawing unit and heat-set.

The drawing step was performed in multi-stage drawing, and the relaxation ratio of the last drawing stage of the multi-stage drawing was 8%. Subsequently, the drawn multifilament yarn was interlaced in an interlacing device using an air pressure of 6.0 kgf/cm2, and then wound on a winding machine. The winding tension is 0.6g/denier.

The rheological properties of the yarns produced were measured and are shown in Table 1 below and in Figures 1 to 5. In addition, the density, weight average molecular weight, and PDI of the produced yarn were analyzed and shown in Table 2 below.

Subsequently, the PE yarns of Examples 1 to 3 and Comparative Examples 1 to 3 were spirally wound with 140 denier polyurethane yarn (spandex) and 140 denier nylon yarn. Covered yarn was produced. The weight of polyethylene yarn is 60% of the total weight of the covering yarn, and the weight of polyurethane yarn and nylon yarn is 20% of the total weight of the covering yarn respectively. The covered yarn is knitted to make protective gloves.

The physical properties of the manufactured gloves were measured and are shown in Table 3 below.

[Table 1]

<Examples 2 and 3 and Comparative Examples 1 to 3>

Protective gloves were produced in the same manner as in Example 1, except that polyethylene yarns meeting the physical properties of Tables 1 and 2 were used.

According to Table 3, it was confirmed that the protective gloves of the Examples manufactured using the polyethylene yarn according to the present invention had excellent cut resistance and low stiffness while having excellent wear resistance, and therefore were better than those of the Comparative Examples. It is said to have improved wearability.

In the above, although the present invention has been explained through specific content, limited exemplary embodiments and drawings, they are only provided to help the overall understanding of the present invention, and the present invention is not limited to the exemplary embodiments, and familiar Those skilled in the art may make various modifications and changes based on the description.

Therefore, the spirit of the present invention should not be limited to the above-described exemplary embodiments, and all modifications equivalent to or equivalent to the claimed patent scope below are intended to fall within the scope and spirit of the present invention.

G’: storage modulus

ω: angular frequency

Claims (10)

A cut-resistant polyethylene yarn having the following properties in a graph of storage modulus (G') as a function of angular frequency (ω) at an angular frequency of 0.1 radians per second (rad/s) Having the storage modulus of 10 Pascals (Pa) to 100 Pascals (Pa), and having an angular frequency of 100 Pascals (Pa) to 1000 Pascals (Pa) when the angular frequency is 1 rad/s (rad/s) and in a plot of tan δ as a function of the angular frequency (ω), having a tan δ of 9 or greater when the angular frequency is 0.1 radians per second (rad/s) . The cut-resistant polyethylene yarn according to claim 1, wherein in the graph of the loss modulus (G″) changing according to the angular frequency (ω), the cut-resistant polyethylene yarn is in the having the loss modulus (G") of 100 Pascal (Pa) to 700 Pascal (Pa) at an angular frequency of 0.1 radians per second (rad/s) and at an angular frequency of 0.25 radians per second (rad/s) /s) to 0.5 rad/s (rad/s) shows the point where the loss modulus is 1000 Pascals (Pa). The cut-resistant polyethylene yarn according to claim 1, wherein in the graph of the complex viscosity (η*) changing according to the angular frequency (ω), the cut-resistant polyethylene yarn is at the angle of When the frequency is 0.1 rad/s (rad/s), it has 3000 Pa. seconds (Pa.s, poise) to 6000 Pa. The complex viscosity in seconds (Pa.s, poise), and has a range of -1000 to - in the section where the angular frequency is 0.1 rad/s (rad/s) to 1 rad/s (rad/s) Average gradient of 300. The cut-resistant polyethylene yarn according to claim 1, wherein the cut-resistant polyethylene yarn has a denier per filament (DPF) of 1 to 3. The fineness of silk denim. The cut-resistant polyethylene yarn according to claim 1, wherein in the graph of the phase angle changing according to the multiple shear modulus (G*), the cut-resistant polyethylene yarn is in the multiple shear modulus. The modulus (G*) is 350 Pascal (Pa) to 1,000 Pascal (Pa) with the phase angle of 75° to 90°. The cut-resistant polyethylene yarn of claim 1, wherein the cut-resistant polyethylene yarn has a lint occurrence number of 20/50,000 meters or less than 20/50,000 meters. A cut-resistant fabric, including the cut-resistant polyethylene yarn described in any one of claims 1 to 6. The cut-resistant fabric of claim 7, wherein the cut-resistant fabric has a cut resistance of 5.5 Newton (N) to 9 Newton (N) as measured according to the specification of ISO13997:1999. A protective product comprising a cut-resistant fabric as claimed in claim 7. The protective product of claim 9, wherein the protective product is a cut-resistant glove.