JPH04333603A - Clothing for self protection - Google Patents

Abstract

PURPOSE:To obtain clothing for self protection, having excellent strength, creep resistance, thrust resistance, wear resistance, cut resistance, maintaining proper flexibility in spite of being lightweight. CONSTITUTION:Clothing for self protection comprising woven or knitted fabric composed of a molecule orientated molded article of ultra-high-molecular weight ethylenic polymer having at least >=5d/g intrinsic viscosity [eta]. The back of the woven or knitted fabric may be optionally lined with nonwoven fabric comprising the molecule orientated molded article.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to self-defense clothing, and more specifically, it is extremely difficult to be cut by a knife, and it is difficult to be stabbed with a metal weapon-like object with a sharp tip. also relates to self-defense clothing that is extremely difficult to pierce.

0002

[Prior art and its problems] V from representatives and foreign countries
Like police officers who protect important people such as IP, due to their occupation,
People who fear that their safety may be threatened by a thug's weapon protect themselves by wearing protective clothing, such as a vest, for example. In our country,
Ordinarily, the average person is not allowed to own a pistol, so the weapon used in such cases is often a sharp-edged object such as a knife or kitchen knife, and protective clothing is made of materials such as Kevlar ( (registered trademark) fiber cloth, and a non-woven fabric such as polypropylene is laminated on the back side.

On the other hand, JP-A-58-180635 discloses a network structure of polyethylene fibers having a weight average molecular weight of at least 500,000, a tensile modulus of at least 300 g/denier, and a tenacity of at least 15 g/denier. Alternatively, it has been disclosed that a composite of the network structure and the matrix formed to a sufficient thickness is used for ballistic resistant articles such as bulletproof vests and helmets. However, conventionally known self-defense clothing cannot be said to have sufficient cut resistance, and the ballistic resistance article does not teach that the structure alone exhibits ballistic resistance. Moreover, it does not disclose what kind of cut resistance the structure exhibits against cutlery.

0004

OBJECTS OF THE INVENTION Therefore, an object of the present invention is to provide self-defense clothing that is extremely difficult to cut even with a sharp knife and has excellent cut resistance.

[0005]

[Means for Solving the Problems] The present invention has been proposed to achieve the above-mentioned object. It also features self-defense clothing with excellent puncture resistance. That is, according to the present invention, the intrinsic viscosity [
Provided is a self-defense garment with excellent cut and puncture resistance, which is made of a knitted fabric made of a molecularly oriented molded product of an ultra-high molecular weight ethylene polymer having a η] of at least 5 dl/g. Further, according to the present invention, the material is a nonwoven fabric made of a molecularly oriented molded product of an ultra-high molecular weight ethylene polymer having an intrinsic viscosity [η] of at least 5 dl/g on at least a part of the back surface of the knitted fabric. This provides self-defense clothing with even better cut and puncture resistance. Furthermore, according to the present invention, the ultra-high molecular weight ethylene polymer contains an α-olefin having 3 or more carbon atoms at an average of 0.
A copolymer of ethylene and α-olefin containing from 1 to 20 atoms, especially when the α-olefin is butene-1,
4-Methylpentene-1, hexene-1 and decene-1
When a copolymer of ethylene and α-olefin, which is one or more selected from the group consisting of provided.

[0006]

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an ultra-high molecular weight ethylene polymer having an intrinsic viscosity [η] of at least 5 dl/g, particularly an α-olefin having 3 or more carbon atoms.
This product was developed based on the knowledge that a knitted fabric made of a molecularly oriented molded product of a copolymer of ethylene and α-olefin containing an average of 0.1 to 20 molecules per 1,000 molecules has outstanding cut resistance. It is something that

The self-defense clothing according to the present invention is made of an ultra-high molecular weight ethylene polymer having an intrinsic viscosity [η] of at least 5 dl/g, preferably 6 to 30 dl/g, as measured in a decalin solvent at 135°C. The knitted fabric of the molecularly oriented molded product, or at least a part of the back side of the knitted fabric, is lined with a nonwoven fabric made of the molecularly oriented molded product of an ultra-high molecular weight ethylene polymer having an intrinsic viscosity [η] of at least 5 dl/g. Use what you made as a material.

The ultra-high molecular weight ethylene polymers include ethylene and α-olefins having 3 or more carbon atoms, such as propylene, butene-1, pentene-1, and 4-methylpentene, which have the above-mentioned intrinsic viscosity. 1, hexene-1,
A copolymer with one or more selected from the group consisting of heptene-1, octene-1 and decene-1 is preferably used, and among them, ethylene and butene-1
, 4-methylpentene-1, hexene-1, octene-1
A copolymer with one or more selected from the group consisting of 1 and decene-1 not only has excellent cut resistance, but also has excellent abrasion resistance and creep resistance, and can be used for the purpose of the present invention. Preferably used.

As the ultra-high molecular weight ethylene polymer used as the backing material, not only the above-mentioned ultra-high molecular weight ethylene copolymer but also ultra-high molecular weight polyethylene can be used. Ethylene and an α-olefin having 3 or more carbon atoms, which have an intrinsic viscosity;
For example, propylene, butene-1, pentene-1, 4
-methylpentene-1, hexene-1, heptene-1,
A copolymer with one or more selected from the group consisting of octene-1 and decene-1, especially ethylene and butene-1, 4-methylpentene-1, hexene-1.
Similarly preferred are copolymers with one or more selected from the group consisting of octene-1, octene-1 and decene-1.

The copolymer of ethylene and α-olefin has an average of 0.1 to 20 carbon atoms per 1000 carbon atoms,
Preferably, the content is preferably 0.5 to 10 on average. When the content of the α-olefin comonomer in the copolymer is within the above range, the α-olefin component forms an intermolecular entanglement structure that is effective in achieving high breaking energy, and this structure improves cut resistance. In the knitted fabric of the molecularly oriented molded product, or at least a part of the back side of the knitted fabric,
By using a material lined with a nonwoven fabric made of a molecularly oriented molded ultra-high molecular weight ethylene polymer with an intrinsic viscosity [η] of at least 5 dl/g, it has excellent cut resistance for self-defense vests, etc. Serves as self-defense clothing. In the self-defense vest, it is preferable that the lining with the nonwoven fabric is applied to reinforce the chest area.

[0011] As described above, the first feature of the self-defense clothing of the present invention is that it has excellent cut resistance against cutlery, but the second feature is that the material has excellent cut resistance. Due to the excellent physical properties and high strength, there is no need to make the material thick for self-defense clothing, and even when lined with the nonwoven fabric, it is still lightweight, resulting in a reduction in weight. Therefore, it is possible to provide self-defense clothing that is comfortable to wear. Furthermore, since the self-defense clothing of the present invention has excellent chemical resistance,
For example, unlike Kevlar, it does not deteriorate due to detergents and its cut resistance decreases.

[0012] Ultra-high molecular weight ethylene α-
Quantification of α-olefin component in olefin copolymer is as follows:
The measurement was performed using an infrared spectrophotometer (manufactured by JASCO Corporation). In other words, the absorbance at 1378 cm-1, which represents the bending vibration of the methyl group of the α-olefin incorporated into the ethylene chain, is measured, and from this the absorbance is measured using a 13C nuclear magnetic resonance apparatus in advance on a test line created using a model compound. It was calculated from the measured value by converting it into the number of methyl branches per 1000 carbon atoms.

Intrinsic viscosity of ultra-high molecular weight ethylene polymer [
If [η] is less than 5 dl/g, even if the stretching ratio is increased, a molecularly oriented molded product with sufficient strength cannot be obtained; The melt viscosity is extremely high, melt fractures etc. occur during extrusion, and the melt spinnability is poor, making it impossible to obtain a suitable multifilament.

The material constituting the self-defense clothing of the present invention is composed of monofilament or multifilament, which is a molecularly oriented molded product of the ultra-high molecular weight ethylene copolymer. In addition to the yarns that can be produced using fibers, we can also use fibrillated yarns made by defibrating stretched tapes or films made from the above-mentioned copolymers using a carding machine, or bulky yarns obtained by controlling the fiber distribution of each part of the constituent fibers. Multifilaments consisting of certain ciliated threads may also be used. The multifilament used does not have to be of a particularly limited denier, and can be of various deniers, but
Usually 100 to 3000 denier, preferably 50
Those having a denier of 0 to 2000 are used. The multifilament molecularly oriented molded product of ultra-high molecular weight ethylene copolymer used in the present invention has a tensile strength of at least 1.8 GPa or more, usually 2.2 GPa or more.

[0015] In the present invention, the nonwoven fabric made of the molecularly oriented molded product of the ultra-high molecular weight ethylene polymer used as a lining material for a knitted fabric collects randomized fiber groups consisting of long fibers or short fibers. The long fibers or short fibers used are usually 0.1 to 50 deniers, particularly preferably 0.5 to 20 deniers. The basis weight of nonwoven fabric is usually 50 to 500 g/m2, especially 100 g/m2.
Preferably, the weight is between 350 g/m2 and 350 g/m2.

Examples of methods for lining a knitted fabric with the nonwoven fabric include methods such as needle punching and water jet punching, and methods such as quilting sewing. For example, when integrating by needle punching, the number of needles penetrating each layer is 30 to 150 per cm2.
times, especially those with 50 times or more, have good interlayer bonding,
Needle depth 8 to 15 mm, especially 10 to 14 mm
Preferably.

In the present invention, the ultra-high molecular weight ethylene copolymer or ethylene homopolymer constituting the self-defense clothing is composed of ethylene, or ethylene and the α-olefin comonomer of the periodic table IVb, Vb, VIb, VII
Group I transition metal compounds and Periodic Table I to III
It can be obtained by slurry polymerization in, for example, an organic solvent in the presence of a catalyst consisting of a group metal hydride or an organic metal.

The ultra-high molecular weight ethylene polymer thus obtained is, for example, blended with a diluent to enable melt molding, or mixed with paraffin wax that is solid at room temperature, melt extruded, and then stretched. By doing so,
It is made into a molecularly oriented molded product such as fiber or tape.

As the diluent, a solvent for the ultra-high molecular weight ethylene polymer and various wax-like substances having dispersibility for the ultra-high molecular weight ethylene polymer are used.

The solvent preferably has a boiling point higher than the melting point of the polymer, more preferably higher than the melting point +20°C. Specifically, such solvents include n-nonane,
n-decane, n-undecane, n-dodecane, n-tetradecane, n-octadecane or liquid paraffin,
Aromatic carbonization of aliphatic hydrocarbon solvents such as kerosene, xylene, naphthalene, tetralin, butylbenzene, p-cymene, cyclohexylbenzene, diethylbenzene, benzylbenzene, dodecylbenzene, bicyclohexyl, decalin, methylnaphthalene, ethylnaphthalene, etc. Hydrogen solvent or its hydrogenated derivative, 1,1,2,2 -
Halogenated hydrocarbon solvents such as tetrachloroethane, pentachloroethane, hexachloroethane, 1,2,3-trichloropropane, dichlorobenzene, 1,2,4-trichlorobenzene, bromobenzene, paraffinic process oil, naphthenic process oil, Examples include mineral oils such as aromatic process oils.

[0021] As the waxes, aliphatic hydrocarbon compounds or derivatives thereof are used.

The aliphatic hydrocarbon compounds are mainly saturated aliphatic hydrocarbon compounds, and usually have a molecular weight of 2.
000 or less, preferably 1000 or less, more preferably 800 or less, which is called a paraffin wax. These aliphatic hydrocarbon compounds include n-alkanes having 22 or more carbon atoms such as docosane, tricosane, tetracosane, and triacontane, mixtures of these with lower n-alkanes as main components, and separation and refinement from petroleum. So-called paraffin wax, medium-low pressure polyethylene wax, high-pressure polyethylene wax, ethylene copolymer wax, or medium-low pressure polyethylene wax, which is a low molecular weight polymer obtained by copolymerizing ethylene or ethylene with other α-olefins. Examples include waxes obtained by reducing the molecular weight of polyethylene such as polyethylene and high-pressure polyethylene by thermal degradation, oxides of these waxes, oxidized waxes modified with maleic acid, and waxes modified with maleic acid.

As the aliphatic hydrocarbon compound derivative, for example, one or more, preferably one or two, particularly preferably one, aliphatic hydrocarbon group (alkyl group, alkenyl group) has one or more, preferably one or two, at the end or inside the aliphatic hydrocarbon group (alkyl group, alkenyl group). A compound having a functional group such as a carboxyl group, a hydroxyl group, a carbamoyl group, an ester group, a mercapto group, or a carbonyl group with a carbon number of 8 or more, preferably a carbon number of 12 to 50, or a molecular weight of 130 to 2000, preferably 200 to 800.
Examples include fatty acids, aliphatic alcohols, fatty acid amides, fatty acid esters, aliphatic mercaptans, aliphatic aldehydes, and aliphatic ketones. Specifically, the fatty acids include capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid; the fatty alcohols include lauryl alcohol, myristyl alcohol, cetyl alcohol, and stearyl alcohol; and the fatty acid amides include caprinamide, laurinamide, Examples of palmitinamide, stearylamide, and fatty acid ester include stearyl acetate.

[0024] The ratio of the ultra-high molecular weight ethylene polymer to the diluent varies depending on the type thereof, but is generally 3:97 to 80:20, particularly 15:85 to 60:40 by weight. It is better to use it as a ratio. If the amount of the diluent is lower than the above range, the melt viscosity will become too high, making melt kneading and melt molding difficult, and the surface of the molded product will be extremely rough, easily causing stretching breakage and the like. On the other hand, if the amount of the diluent is larger than the above range, melt-kneading will become difficult and the stretchability of the molded product will be poor.

[0025] Melt kneading is generally carried out at 150 to 300°C.
In particular, it is desirable to carry out the process at a temperature of 170 to 270°C; if the temperature is lower than the above range, the melt viscosity will be too high and melt molding will be difficult; if the temperature is higher than the above range, the melt viscosity will be The molecular weight of the high molecular weight ethylene polymer decreases, making it difficult to obtain a molded article with high elastic modulus and high strength. The blending may be carried out by dry blending using a Henschel mixer, a V-type blender, or the like, or by melt mixing using a single-screw or multi-screw extruder.

[0026] Melt molding is generally performed by melt extrusion molding. For example, drawn filaments can be obtained by melt extrusion through a spinneret, and tapes can be obtained by extrusion through a flat or ring die. At this time, the molten material extruded from the spinneret may be subjected to drafting, that is, drawing in the molten state. The draft ratio can be defined as the ratio of the extrusion speed VO of the molten resin in the die orifice and the winding speed V of the undrawn material cooled and solidified by the following formula. Draft ratio=V/VO This draft ratio varies depending on the temperature of the mixture, the molecular weight of the ultra-high molecular weight ethylene polymer, etc., but it can usually be 3 or more, preferably 6 or more.

Next, the unstretched molded product of the ultra-high molecular weight ethylene polymer thus obtained is subjected to a stretching treatment. The stretching operation can be performed in one stage or in multiple stages of two or more stages. The stretching ratio depends on the desired molecular orientation and the accompanying effect of increasing the melting temperature, but it is generally satisfactory if the stretching operation is carried out at a stretching ratio of 5 to 80 times, particularly 10 to 50 times. Get the desired results. Generally, multi-stage stretching of two or more stages is advantageous, and in the first stage, 80
The stretching operation is performed while extracting the diluent in the extruded product at a relatively low temperature of 120 to 120°C, and in the second and subsequent stages,
It is preferable to continue the stretching operation of the molded body at a temperature of 120 to 160° C. and higher than the first-stage stretching temperature. The molecularly oriented molded product thus obtained can be heat-treated under restrictive conditions if desired. This heat treatment is generally from 140 to 180°C, in particular from 150 to 175°C.
It can be carried out for 1 to 20 minutes, especially 3 to 10 minutes, at a temperature of . The heat treatment further advances the crystallization of the oriented crystal portions, shifts the crystal melting temperature to a higher temperature side, improves strength and elastic modulus, and improves creep resistance at high temperatures.

The process of molecular orientation in a molded article can be determined by X-ray diffraction, birefringence, fluorescence polarization, and the like. In the case of the drawn filament of the ultra-high molecular weight ethylene polymer of the present invention, the degree of orientation according to the half-width as described in detail in, for example, Yukichi Go and Kiichiro Kubo: Industrial Chemistry Magazine Vol. 39, p. 992 (1939), that is, where H° is the half-width (°) of the intensity distribution curve along the Debye ring of the strongest paratropic surface on the equator. The degree of orientation (F) defined by is 0.90 or more, especially 0.95
It is desirable for the molecules to be oriented in the above manner from the viewpoint of mechanical properties.

[0029]

According to the present invention, a knitted fabric made of a molecularly oriented molded product of a specific polymer, or a nonwoven fabric made of a molecularly oriented molded product of the specific polymer, is provided on at least a portion of the back side of the knitted fabric. By using a lined material as a material, the material has the characteristics of excellent cut resistance despite being thin, as well as high strength with excellent impact resistance and creep resistance. Therefore, it is possible to provide self-defense clothing that is extremely resistant to being torn by sharp knives and is comfortable to wear.

[0030]

[Examples] The present invention will be explained below with reference to Examples. Reference Example 1 <Polymerization of ultra-high molecular weight ethylene/butene-1 copolymer> Slurry polymerization of ultra-high molecular weight ethylene/butene-1 copolymer was carried out using a Ziegler catalyst and 1 liter of n-decane as the polymerization solvent. Ta. A mixed monomer gas containing ethylene and butene-1 in a molar ratio of 97.2:2.8 was continuously supplied to the reactor so as to maintain a constant pressure of 5 kg/cm2. Polymerization was completed in 2 hours at a reaction temperature of 70°C. The yield of the obtained ultra-high molecular weight ethylene/butene-1 copolymer powder was 160 g, the intrinsic viscosity [η] (decalin: 135°C) was 8.2 dl/g, and the butene-1 content determined by an infrared spectrophotometer was 1.5 per 1000 carbon atoms
It was.

<Preparation of stretched oriented product of ultra-high molecular weight ethylene/butene-1 copolymer> 20 parts by weight of the ultra-high molecular weight ethylene/butene-1 copolymer powder obtained by the above polymerization and paraffin wax (melting point = 69 °C, molecular weight = 490)8
The mixture with 0 parts by weight was melt-spun under the following conditions. To 100 parts by weight of the mixture, 0.0% of 3,5-di-tert-butyl-4-hydroxytoluene was added as a process stabilizer.
1 part by weight was added. Next, the mixture was heated to a set temperature of 190°C using a screw extruder (screw diameter = 25 mm, L/D = 25, manufactured by Thermoplastics).
Melt-kneading was performed. Subsequently, the mixed melt was melt-spun using a spinning die with an orifice diameter of 2 mm attached to the extruder. The extrusion melt was taken off at a draft ratio of 36 times through an air gap of 180 cm, cooled and solidified in air, and undrawn fibers were obtained. Furthermore, the undrawn fibers were drawn under the following conditions.

Two-stage stretching was carried out using three godet rolls. At this time, the heating medium in the first drawing tank was n-decane at a temperature of 110°C, and the heating medium in the second drawing tank was triethylene glycol at a temperature of 145°C. The effective length of each tank was 50 cm. When stretching,
By setting the rotation speed of the first godet roll to 0.5 m/min and changing the rotation speed of the third godet roll, oriented fibers with a desired drawing ratio were obtained. The rotational speed of the second godet roll was appropriately selected within a range that allowed stable stretching. Almost all of the initially mixed paraffin wax is n-
Extracted into decane. Thereafter, the oriented fibers were washed with water, dried under reduced pressure at room temperature overnight, and then subjected to measurement of various physical properties. Note that the stretching ratio was calculated from the rotational speed ratio of the first godet roll and the third godet roll.

<Measurement of tensile properties> The elastic modulus and tensile strength were measured at room temperature (23° C.) using a tensile tester model DCS-50M manufactured by Shimadzu Corporation. At this time, the sample length between the clamps was 100 mm, and the tensile rate was 100 mm/min (100%/min strain rate). The elastic modulus was calculated using the slope of the tangent at the initial elastic modulus. The fiber cross-sectional area required for calculation was calculated from the weight, assuming a density of 0.960 g/cc.

<Tensile modulus and strength retention after heat history> The heat history test was conducted using a gear oven (Perfect Oven:
This was done by leaving it in a container (manufactured by Tabai Seisakusho). The sample had a length of about 3 m, and was folded over a stainless steel frame equipped with a plurality of pulleys at both ends to fix both ends of the sample. At this time, both ends of the sample were fixed to the extent that the sample did not sag, and no tension was actively applied to the sample. The tensile properties after the thermal history were measured based on the description of the measurement of the tensile properties described above.

<Measurement of Creep Resistance> Creep resistance was measured using a thermal stress strain measuring device TMA/SS10 (manufactured by Seiko Electronics Co., Ltd.) with a sample length of 1 cm and an ambient temperature of 70°C.
℃, and the loading was carried out under accelerated conditions with a weight corresponding to 30% of the breaking load at room temperature. In order to quantitatively evaluate the amount of creep, the following two values were determined. That is, the values are the value of creep elongation (%) CR90 when 90 seconds have elapsed after applying a load to the sample, and the value of average creep rate (sec-1) ε when 180 seconds have elapsed from the time when 90 seconds have elapsed.

Table 1 shows the tensile properties of the multifilament obtained by bundling a plurality of drawn and oriented fibers.

The original crystal melting peak of the ultra-high molecular weight ethylene-butene-1 copolymer drawn filament (Sample-1) was 126.7°C, and Tp relative to the total crystal melting peak area.
The percentage was 33.8%. Also, the creep resistance is C
R90=3.1%, ε=3.03×10-5sec-
It was 1. Furthermore, after heat history at 170°C for 5 minutes, the elastic modulus retention rate was 102.2%, and the strength retention rate was 102.
No deterioration in performance due to thermal history was observed at 5%. Also, the amount of work required to break the drawn filament is 10.3
kg・m/g, and the density is 0.973g/cm3
, the dielectric constant is 2.2, and the dielectric loss tangent is 0.02.
4%, and the impulse voltage breakdown value is 180kV/
It was mm. The reduction rate of multifilament knot strength and loop strength with respect to linear strength was 38%, respectively.
It was 36%.

Reference Example 2 <Polymerization of ultra-high molecular weight polyethylene> Slurry polymerization of ultra-high molecular weight polyethylene was carried out using a Ziegler catalyst and 1 liter of n-decane as a polymerization solvent. Prior to polymerization, a mixed gas of ethylene gas and hydrogen gas was introduced into the reactor at a pressure of 5 kg/cm2 (including hydrogen gas partial pressure of 0.2 kg).
/cm2), and thereafter only ethylene gas was supplied to maintain the polymerization pressure at 5 kg/cm2. Polymerization was completed in 2 hours at a reaction temperature of 70°C. The yield of the obtained ultra-high molecular weight polyethylene was 170 g, and the intrinsic viscosity [
η] (decalin: 135°C) was 7.42 dl/g.

<Preparation of stretched and oriented ultra-high molecular weight polyethylene polymer> Ultra-high molecular weight polyethylene (homopolymer) powder (intrinsic viscosity [η]=7.42 dl/g, decalin,
A mixture of 20 parts by weight of paraffin wax (melting point = 69°C, molecular weight = 490) and 80 parts by weight of paraffin wax (melting point = 69°C, molecular weight = 490) was melt-spun and drawn using the method of Reference Example 1, and drawn to form a stretch-oriented fiber (sample-2). Obtained. Table 2 shows the tensile properties of the multifilament obtained by bundling a plurality of drawn and oriented fibers. Ultra-high molecular weight polyethylene drawn filament (sample-
2) The original crystal melting peak was 135.1°C, and the ratio of Tp to the total crystal melting peak area was 8.8%. Similarly, the ratio of the high temperature side peak Tp1 to the total crystal melting peak area was 1% or less. Creep resistance is CR90=11.9%, ε=1.07×10-3sec
-1. Further, after heat history at 170°C for 5 minutes, the elastic modulus retention rate was 80.4% and the strength retention rate was 78.2%. Furthermore, the amount of work required to break sample-3 was 10.
2kg・m/g, and the density is 0.985g/cm3
The dielectric constant is 2.3 and the dielectric loss tangent is 0.030.
%, and the impulse voltage breakdown value is 182kV/mm
Met. The reduction rates of multifilament knot strength and loop strength with respect to linear strength were 54% and 52%, respectively.
%Met.

Examples Production of nonwoven fabric Molecularly oriented molded product of ultra-high molecular weight ethylene-butene-1 copolymer obtained in Reference Example 1 (Sample-1) and Reference Example 2
Molecularly oriented molded product of ultra-high molecular weight polyethylene obtained in (
Sample-2) multifilament with fiber length of 5
It was cut into short fibers of 0 mm. The short fibers were then fed into a cotton opener to form cotton. The obtained cotton is passed through a card machine and a web forming machine to a target weight of 250.
A web of g/m2 was formed. Furthermore, this web is guided to a needle punch machine (FEHRER model 12/33) and a needle punch needle: FOSTER NEED
A nonwoven fabric was obtained by needle punching under the conditions of 40HDB manufactured by LE, needle depth = 12 mm, and number of punches = 50 N/cm2.

The thickness and basis weight of the obtained nonwoven fabric were as shown in Table 3 below.

[0042] Considering the air permeability, a knitted cloth was used for the test. 1000 denier/10 of sample-1 and sample-2
0 filament was used to knit an 8 gauge minano rib knit using a knitting machine. The fabric weight and thickness of the obtained knit were as shown in Table 4 below.

Cut resistance evaluation method A test specimen (cloth, non-woven fabric) was placed on top of a wooden box filled with oil clay, and a cutlery (funeral knife) was dropped from the top in a vertical direction to evaluate puncture resistance. The configuration of the evaluation device is shown in Figure 1. A cloth (non-woven fabric) to be tested is placed without being fixed on a wooden box 4 of 20 x 20 x 20 cm filled with commercially available oil clay (manufactured by Pajico), and above this is a cloth with an inner diameter of 8 cm and a length of 1. A 1 m cylinder 3 is installed vertically, and a knife 1 with a weight 2 attached to the top is dropped perpendicularly to the surface of the test object through the inside of the cylinder 3, and the falling height and the test object cross (
Cut resistance was investigated by measuring the length of the cutting edge that pierced through (and non-woven fabric). The knife used in the test was the Funayuki knife "Chiharu" manufactured by Chiharu Cutlery Main Factory, which has the shape shown in Figure 2 (blade length = 17 cm, maximum blade width = 4 cm, maximum back thickness = 4 m).
m), the weight 2 is 2 mm from the inner diameter of the cylinder 3 so that the total weight with the knife 1 is 1 kg and it falls perpendicularly to the test object.
It was made into a small cylindrical shape. In addition, in consideration of changes in the cutting edge due to the test, a new cutting tool was used every 5 measurements.

Evaluation Results The cut resistance evaluation results are shown in Table 5. As a comparative example, a commercially available polyester workwear fabric (thickness: 0.45 mm, basis weight: 250 g/m2) was also tested in the same manner. In the test, each condition was measured five times and expressed as an average value. As mentioned above, by combining the cloth made of the molecularly oriented molded article of the ultra-high molecular weight ethylene copolymer of the present invention, or the same nonwoven fabric, it is possible to provide protective clothing that will not cause fatal injuries.

[0045]

[Brief explanation of the drawing]

FIG. 1 is a perspective view schematically showing an apparatus for measuring cut resistance of self-defense clothing according to the present invention.

FIG. 2 is a perspective view of the cutter used in the measurement.

Claims (5)

[Claims] Claim 1: The intrinsic viscosity [η] is at least 5 dl/
Self-defense clothing with excellent cut resistance and puncture resistance, which is made of a knitted fabric made of a molecularly oriented molded product of an ultra-high molecular weight ethylene polymer. 2. The material is such that at least a part of the surface of the knitted fabric is lined with a nonwoven fabric made of a molecularly oriented molded product of an ultra-high molecular weight ethylene polymer having an intrinsic viscosity [η] of at least 5 dl/g. The self-defense clothing according to claim 1, which is a self-defense clothing. 3. The ultra-high molecular weight ethylene polymer contains ethylene and α-olefin containing on average 0.1 to 20 α-olefins having 3 or more carbon atoms per 1000 carbon atoms.
The self-defense clothing according to claim 1 or 2, which is an olefin copolymer. 4. The α-olefin is butene-1,4-
4. The self-defense clothing according to claim 3, wherein the material is one or more selected from the group consisting of methylpentene-1, hexene-1, and decene-1. Claim 5: The content of α-olefin is 1 carbon atom.
5. The self-defense clothing according to claim 3 or 4, wherein the average number is 0.5 to 10 pieces per 1,000 pieces.