JP6314014B2 - Net with excellent wind resistance - Google Patents

Description

  The present invention relates to a net used for semi-light-shielding or semi-hiding in a house, a store, a farm, or the like. More specifically, it is a net that is woven and knitted only with a sheath-core type thermoadhesive conjugate fiber having the same fineness, and the intersections of the sheath-core type thermoadhesive conjugate fibers are heat-sealed, and the density of the fibers It is related with the net | network excellent in the wind resistance used for the semi-light-shielding or semi-hiding | occlusion use provided with the target light-shielding rate or hiding effect.

  In houses and stores, curtains are generally used for light shielding or concealment purposes. Thick fabric curtains are made of fabric woven so that the fiber's eyes are tightly packed, and combined with multiple fabrics to create a certain level of thickness. Is obtained. Further, in the case where a complete light shielding effect or a completely concealing effect is not required, for example, a lace fabric curtain is widely used. Since this curtain has a larger fiber mesh (distance between fibers) than a thick fabric curtain, it can be seen thinly over the curtain.

  However, a curtain using a fabric generally has a significantly low air permeability due to the thickness of the fabric and clogging of fibers. Even when a thin fabric such as lace fabric is used, there is a low air permeability due to the lint peculiar to spun yarn and the softness of the fabric, and it is rolled up by the wind or its shape collapses so that it can shield and conceal May be damaged. In addition, it is difficult to use in places with high humidity such as bathroom windows.

  In addition, curtains and blinds are widely used in houses and stores. Blinds can adjust the degree of shading or concealment by arbitrarily adjusting the gap between the wings, but, like a curtain, the wings may be deformed by wind pressure, which may impair the shading or concealing effect.

  Shading nets are rarely used in houses and stores, and are widely used in agricultural applications. Therefore, as a prior art, a shading net for agriculture is mainly used. In general, a light-shielding net for agriculture is widely used in which a film, a flat yarn or the like is inserted between warps or wefts of the net. For example, Patent Document 1 discloses a net that is formed of heat-fusible fibers and tape yarns and in which the intersections of the warp yarns and the weft yarns of the heat-fusible fibers are heat-sealed. In Patent Document 2, a large number of flat yarns formed in a tape shape with a light-shielding material and a large number of yarns formed of a stretchable material are crossed to form a net. A shading net is disclosed. Further, Patent Document 3 discloses a light-shielding net in which a tape-like thread formed by slitting a non-woven fabric into a thin width is heat-sealed at least on one side of a net base fabric made of a synthetic resin flat yarn or filament. Has been.

  As in the nets disclosed in Patent Documents 1 to 3, in the prior art, the use of a film, a flat yarn, or the like was indispensable in order to provide a light shielding effect. Further, since the film and flat yarn are thin, the light resistance is weak, and the opening of the net increases due to deterioration over time, and the light shielding and concealing effects may be lowered.

  A net material woven and knitted with a heat-adhesive conjugate fiber and heat-bonded at the intersection of fibers is known, but the net material is not knitted and knitted with warps and wefts closely, and does not have a high light shielding or hiding effect. It was. Moreover, since the effect of the cross point thermal bonding is expected, the area ratio of the sheath part exceeds 50% with respect to the core part, and when the area of the sheath part is very large, the cross point thermal adhesive force is large. Since the resin component in the sheath part melts and spreads when bonded, the degree of mesh may vary depending on the location or may be blocked. Further, in a net where the intersection is not thermally bonded, the position of the fiber may shift due to tension or the like. For this reason, the scale may change due to external pressure such as wind pressure.

  Further, in the conventional net, when an external force such as wind is applied in a state where tension is applied, a load is applied to the bottom of the net, and the fibers constituting the bottom or the vicinity thereof may be cut. In addition, when the apparent warp constituting the net has an angle with respect to the direction of gravity due to repeated winding or stretching of the net, that is, when the net is inclined, stress is applied to any intersection of the fibers due to external force. Concentrated, sometimes unraveled and torn. These problems are relatively likely to occur when the warps and wefts have very different fineness or when the fineness is small.

  Increasing the fineness increases the strength of the fiber itself, but increases the weight of the net itself. In this case, a continuous load is applied to the upper part of the net, and the fibers constituting the upper part or the vicinity thereof are cut. End up. Moreover, since the rigidity (hardness) of the net increases, it becomes difficult to handle.

  The conventional net has the same number of warps and wefts driven (the opening of the net is square). In this case, if a stress is applied with the net tilted, a large plane distortion of the net occurs. This is because, in the square forming the opening, the received external force is stress-distributed in one diagonal direction, but this stress distribution is only concentrated in one direction. A large raised muscle will be generated. This phenomenon also damages the intersections of the nets and the fibers themselves, which can cause tears and tears.

JP-A-10-44273 JP-A-6-153710 Japanese Patent Laid-Open No. 10-327684

  The present invention does not use a film, flat yarn or the like, there is no change in the scale due to external pressure such as wind pressure, no tearing, no plane distortion deformation, and there is no change in shading or hiding effect over time, It is an object to provide a net having an appropriate light shielding and concealing effect.

  The present inventors have intensively studied to solve the above problems. As a result, it has been found that the above-mentioned problems can be solved by using a sheath-core type thermoadhesive composite monofilament having the same fineness for the warp and the weft, and weaving and knitting the composite monofilament in a certain range. It came to complete.

That is, the present invention is as follows.
1. A net in which a sheath-core type thermoadhesive composite monofilament having a fineness of 300 to 800 dtex is densely woven and knitted as warps and wefts. The warp and wefts have the same fineness, and the ratio of the number of warps and wefts to be driven is within a certain range. A net that is woven and knitted so that the intersection of warp and weft is thermally bonded.

2. The sheath-core thermoadhesive composite monofilament is composed of a low-melting point thermoplastic resin having a melting point difference of 15 ° C. or higher and a high-melting point thermoplastic resin, and the sheath-core ratio is in the range of sheath: core = 20: 80-60: 40 by weight ratio. The net according to Item 1, wherein

Item 3. The net according to Item 1 or 2, wherein the ratio of the number of warps and wefts per inch is densely woven and knitted in a range of 1.6 to 2.6 on the basis of the smaller number of driven yarns.

4). Item 4. The net according to any one of Items 1 to 3, wherein the light shielding ratio is 60% or more and 85% or less.

5. Item 5. The net according to any one of Items 1 to 4, wherein the tear strength is 70 N or more.

6). Item 6. The net according to any one of Items 1 to 5, wherein the tensile strength is 140 N or more and the 45 ° tensile strength is 70 N or more.

7). Item using the net according to any one of Items 1 to 6.

  According to the present invention, there is no need to use a film, a flat yarn, or the like that has been conventionally required. Thin films and flat yarns have a fast light resistance deterioration, but the net of the present invention is composed only of a heat-adhesive composite monofilament, and therefore has a high light resistance as a net material. In addition, the intersections are thermally bonded, and there is no change in scale due to external pressure such as wind pressure, and no change in light shielding or concealment effect.

  Furthermore, since the net of the present invention is densely woven and knitted and the fiber intersections are thermally bonded, the heat shielding effect is also high. Furthermore, since the opening is not square, even if the received external force is stress-dispersed in one diagonal direction, the diagonal length in each opening is long, so that the load distribution amount per opening is small. That is, the stress dispersion vector amount (energy amount) is smaller than that of the square shape. For this reason, when viewed as a whole net, one large raised streak is hardly generated in the diagonal direction, so that the plane distortion of the large net is unlikely to occur.

2 is a photograph of a net disclosed in Example 1 (using a single-lens reflex camera and a macro lens).

  Hereinafter, the present invention will be described in detail. The sheath-core type thermoadhesive composite monofilament may be simply referred to as composite monofilament or fiber. A net suitable for light shielding according to the present invention may be referred to as a light shielding net or simply a net. The act of forming into a net shape using fibers is expressed as weaving. In the present invention, a net having a mesh size of 1 mm or less is defined as dense when the driving ratio is 1.5 or more.

  The light-shielding net of the present invention is a net in which a sheath-core type thermoadhesive composite monofilament having the same fineness is densely woven and knitted as warps and wefts. Here, the same fineness may not be completely the same, and common sense differences that occur in manufacturing are allowed. In general, a difference of about ± 10 dtex is allowed as being included in the same concept.

  The composite monofilament has a fineness of 300 dtex or more in consideration of the adhesiveness of the fiber intersection when weaving and knitting on the net and the strength of the net itself. Preferably, it is 400 dtex or more, more preferably 550 dtex or more.

  Further, in order to prevent excessive rigidity of the net itself and an increase in weight, a composite monofilament having a fineness of 800 dtex or less is used. Preferably it is 750 dtex or less, More preferably, it is 700 dtex or less.

  In the present invention, since the fineness of the warp and the weft is the same, there is no relatively fine fiber, so that stress concentration does not occur only in the fine fiber when subjected to an external load. , The net is hard to break.

  The composite monofilament constituting the light-shielding net of the present invention is a sheath-core type thermoadhesive composite monofilament. The structure of the composite monofilament includes a sheath core type that is substantially concentric like a pencil cross section, an eccentric type such as a crescent moon, and a sea island type that looks like islands floating in the sea. In order to prevent crimping (crimp; curling of curled fibers), a sheath-core type composite monofilament having a substantially concentric shape is selected. Crimping should not cause problems such as equipment troubles during weaving or distortion of the net.

  As described above, the sheath core type has a substantially concentric cross section of the fiber. The cross section of the fiber is a cross section cut at a right angle to the longitudinal direction of the fiber. The almost concentric circle means that a circle (inner circle) drawn with a core component appears almost at the center of a circle drawn with a sheath component (outer circle), but the center of the outer circle and the center of the inner circle are completely Is not required until it matches. It may be a substantially concentric circle in appearance.

  The sheath-core ratio of the composite monofilament is preferably in the range of sheath component: core component = 20: 80 to 60:40 (weight ratio). The lower limit value of 20 wt% of the sheath component is based on the bond strength at the fiber intersection, and the upper limit value of 60 wt% is based on fiber damage (filming) during weaving and knitting. A more preferable range is sheath component: core component = 30: 70 to 50:50 (weight ratio).

  The composite monofilament constituting the light-shielding net of the present invention is preferably composed of a low-melting point thermoplastic resin and a high-melting point thermoplastic resin, and preferably has a melting point difference of 15 ° C. or more. Since thermal bonding at the fiber intersection is essential, the sheath component is a low melting thermoplastic resin and the core component is a high melting thermoplastic resin.

  If the melting point difference is small, it is difficult to adjust the temperature at the time of thermal bonding. A more preferable melting point difference is 25 ° C. or more, and further preferably 30 ° C. or more. The upper limit of the melting point difference is not particularly specified, and a material to be the sheath component or the core component may be selected in consideration of the thermal deterioration of the sheath component resin due to the significant melting point difference.

  The material of the composite monofilament constituting the light-shielding net of the present invention is a polyolefin such as a high-density polyethylene, low-density polyethylene, linear low-density polyethylene, polypropylene, a binary to ternary copolymer of propylene and another α-olefin. , Polyamides such as nylon-6 and nylon-66, polyethylene terephthalate, low melting point copolymerized polyesters in which terephthalic acid and isophthalic acid are copolymerized as an acid component, thermoplastic resins such as polyvinyl chloride, polyvinylidene fluoride, and polyphenylene sulfide The mixture etc. can be used.

  Since the fiber used in the present invention is a composite monofilament, the sheath component and the core component can be exemplified by various combinations of the thermoplastic resins. For example, high density polyethylene / polypropylene, propylene / ethylene / binary copolymer / polypropylene, propylene / ethylene / butene-1 terpolymer / polypropylene, high density polyethylene / polyethylene terephthalate, polypropylene / polyethylene terephthalate, low melting point copolymer Examples thereof include a combination of polyester / polyethylene terephthalate.

  Among these combinations, preferred combinations are high density polyethylene / polypropylene, propylene / ethylene / butene-1 terpolymer / polypropylene, and polypropylene / polyethylene terephthalate.

  The composite monofilament used in the present invention can be obtained by spinning by a known method. The spinning method is not particularly limited as long as a sheath-core type composite monofilament is obtained.

  In the shading net of the present invention, the ratio of the number of warps and wefts driven per inch can be adjusted so as to achieve a predetermined concealing effect and shading rate. It is preferable that the knitting number ratio is densely woven or knitted so as to be in the range of 1.6 to 2.6 on the basis of the smaller number of driving. For example, if the number of warp yarns per inch is 20 and the number of weft yarns per inch is 40, the ratio of the number of yarns to be driven is 2.0. Since the concealing effect and the light shielding rate are adjusted by the ratio of the number of driving, there is no particularly preferable range and is determined according to the purpose.

  In a normal net, the mesh means the distance between fibers. Agricultural nets with a size of about 4 mm are the widest category. In the present invention, it is possible to set the scale to about 4 mm. However, since the scale of 4 mm is generally too wide in a house or a store, it is preferably set to 1 mm or less. There is no limit to the lower limit value, and the range that can be woven or knitted industrially is the lower limit value.

  In the present invention, in relation to the number ratio of driving, a net having a mesh size of 1 mm or less is referred to as dense when the driving ratio is 1.5 or more. Since it is preferable that the knitting / knitting ratio is in the range of 1.6 to 2.6, in this case, the knitting / knitting is densely woven / knitted.

  Depending on the color of the fiber, the concealment effect and the light shielding rate may change. Even if the shot ratio is the same, generally black fibers are added to natural fibers (color systems that do not use pigments but derived from resin) and glossy fibers to which metal pigments are added. There is a tendency for the light shielding rate to be lower than that of the treated fibers. The combination of warp and weft may be any color combination. The shading rate may change slightly depending on the weaving method. However, if the preferable shot ratio of the present invention is in the range of 1.6 to 2.6, it is possible to adjust the light shielding rate to approximately 60% or more and 85% or less, and a concealing effect is also obtained.

  The tear strength of the net of the present invention is 70 N or more. The tear strength is considered to correlate with the weak physical property of the bond strength at the fiber intersection or the single yarn strength, and is one of the important factors in understanding the breaking and breaking of the net when subjected to external force. In particular, in the present invention, warps and wefts are densely woven and knitted, so it is considered that they are more susceptible to wind than ordinary nets.

  Although there is no clear relationship between the breaking of the net and the wind pressure, the wind pressure resistance (standard) of the sash door required for general housing is 800 MPa (wind speed 36 m / s) with the first floor window according to JIS class. About) The second floor window is 1200 MPa (wind speed of about 44 m / s), and the third floor window is 1600 MPa (wind speed of about 50 m / s). Considering the relationship between wind speed and stress described in this JIS grade guideline, generally the wind speed during typhoon is 17 m / s (wind force 8) or more, and the net has many openings, the stress is about 70 MPa (approximately 70 N (Equivalent to the tear strength) is preferable because it can withstand use in harsh environments without hindrance.

  The net of the present invention has a 45 ° tear strength of 70 N or more. The 45 ° tear test is not specified in a specific industrial standard, but assumes a condition where a load is applied by the net. In addition, this test is measured using the test piece in which the fibers in the test piece are inclined by 45 ° with respect to the gripping chuck horizontal plane of the evaluation device.

  The 45 ° tear strength is the same concept as a normal tear test in that it understands the physical properties of individual fibers. Therefore, it is considered to correlate with the weak physical properties of the bond strength at the fiber intersection or the single yarn strength, and the 45 ° tear strength is preferably 70 N or more as in the normal tear test.

  The tensile strength of the net of the present invention is 140 N or more. Tensile strength is also considered to correlate with the weak physical properties of the bond strength at the fiber intersection or single yarn strength, but the tensile strength reflects the effect of individual fibers, whereas the tensile strength is the strength at the surface (group). reflect. It is also one of the important factors in understanding the breaking and unraveling of the net when receiving external forces.

  When the net is stretched, tension is working on at least two sides (up and down or left and right) facing each other. In addition, when fixed up and down, the net weight of the net is also involved as a tension. When an external force (stress) is applied to the net surface, the stress is distributed in all directions, but the stress may be amplified by the interference of the wave front. For this reason, it is preferable that the tensile strength is 140 N or more, which is twice the tear strength.

  The net of the present invention has a 45 ° tensile strength of 70 N or more. The 45 ° tensile test is not stipulated in a specific industry standard, but it is an important factor in considering how the external force (stress) received on the surface affects individual fibers. One. In addition, this test is measured using the test piece in which the fibers in the test piece are inclined by 45 ° with respect to the gripping chuck horizontal plane of the evaluation device.

  Since the 45 ° tensile strength is the same as the tear test in that it understands the physical properties of individual fibers, it is considered that the 45 ° tensile strength also correlates with a weak physical property, either the adhesive strength at the fiber intersection or the single yarn strength. For this reason, it is preferable that 45 degree tensile strength is 70 N or more like a tear test.

  The composite monofilament used in the present invention may be added with an effective amount of various additives such as a light-resistant agent and a flame retardant, in addition to the above-described pigment, as necessary. The additive may be previously kneaded into the resin used as a raw material for the composite monofilament, and may be added later or added during spinning.

As the light resistance agent, for example, the following can be used.
Bis (2,2 ′, 6,6′-tetramethyl-4-piperidyl) sebacate, tetrakis (2,2,6,6-tetramethyl-4-piperidyl) -1,2,3,4-butanetetracarboxyl And hindered amine compounds such as dimethyl succinate 1- (2-hydroxyethyl) -4-hydroxy-2,2,6,6-tetramethylpiperidine polycondensate. Benzophenone-based compounds such as 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone. Benzotriazoles such as 2 (2′-hydroxy-5-methylphenyl) benzotriazole, 2 (2′-hydroxy-3′-t-butyl-5′-methylphenyl) -5-chlorobenzotriazole, 2,4 -Light-proofing agents such as various ultraviolet absorbers such as benzoate type such as di-t-butyl-phenyl-3,5-di-t-butyl-4-hydroxybenzoate and radical scavengers.

As the flame retardant, for example, the following can be used.
Chlorinated or brominated halogen compounds, inorganic flame retardants such as antimony oxide, cyclic phosphazene compounds such as 1,1,3,3,5,5-hexa (methoxy) cyclotriphosphazene, or 1,1,3 Chain phosphazene compounds such as 3,3,5,5-hexa (methoxy) triphosphazene.

  The use and type of the light proofing agent and flame retardant may be selected according to the purpose, and the combination thereof is also arbitrary. However, regarding the flame retardant, it is preferable to use various phosphazene compounds in consideration of the load on the environment and the human body. In addition, an effective amount of additives other than those described above can be added depending on the use environment and purpose.

  The woven / knitting method for obtaining the light-shielding net of the present invention is not particularly limited as long as a conventionally known knitting / knitting method can be used and the effect of the present invention is not hindered. Most of the known shading nets are obtained by plain weaving, but we choose a weaving method such as oblique weaving, broken oblique weaving, or twill weaving in consideration of designability and light reflection / diffusion effects between fibers. May be.

  After weaving, the intersections of the fibers are thermally bonded by a heat treatment device. The heating temperature may be equal to or higher than the temperature at which the intersections of the fibers used in the net of the present invention are fused. Specifically, the melting point of the low-melting thermoplastic resin may be higher than the softening point or higher than the melting point, and lower than the melting point of the high-melting thermoplastic resin.

  Various apparatuses can be used as the heat treatment apparatus. For example, a hot-air heater, an infrared heater, a far-infrared heater, a high-pressure steam heater, an ultrasonic heater, a hot roll heater, a thermocompression roll heater, and a combination of the above devices. Can be used. When a device combining a hot air heater and a hot roll heater, or a device combining a hot air heater and a thermocompression roll heater is used, a net having high adhesive strength at the fiber intersection can be obtained.

  Thus, since the intersection of the light-shielding net of the present invention is thermally bonded, for example, even if it is cut into a blind wing, it does not collapse due to wind pressure. Further, secondary processing such as pleating can be easily performed.

  The shading net of the present invention may be used as it is, but can be used by being incorporated into various articles.

  The article using the light-shielding net of the present invention includes, for example, a light-shielding screen, a cover screen for preventing see-through, various building materials such as screen doors, warmth and space partition materials, industrial materials, and agricultural materials such as a net for adjusting the amount of light. Is mentioned. Moreover, the use to be used is not limited to these.

  The present invention will be described in more detail based on examples. The present invention is not limited to the following examples.

<Method for evaluating concealment effect>
A net having a size of 20 cm × 30 cm was prepared. This was fixed to the window glass with tape. The situation inside and outside the room was observed from a position 2 m away from the window, and the concealing effect was evaluated. The evaluation was carried out by the following five-step visual sensory method and expressed as an average value of the evaluation results of five people. The evaluation was carried out on a sunny day in spring. In addition, we turned on the room light and confirmed beforehand that the room can be seen well even from the outside. All samples were evaluated on the same day.

(Sensory evaluation score classification)
1 point: You can see the situation over the internet well 2 points: You can see the situation over the internet a little, and you can see what is there 3 points: You can see the situation over the internet a little, but you can't understand without watching it 4 points: Over the internet The appearance is somewhat visible, but I don't know what it is 5 points: I can't see anything over the Internet (evaluation of concealment effect)
(Score of the result of observing the room from the outside)-(Score of the result of observing the room from the outside)
When 1 or more: Concealing effect is present. When less than 1: Concealment effect is determined to be absent.

<Evaluation method of total light transmittance>
It carried out according to JIS K 7375. The light shielding rate was determined from the following formula from the total light transmittance.
Light blocking ratio (%) = 100−total light transmittance (%)

<Tear strength>
The tear test was performed at a test speed of 100 mm / min in accordance with JIS L 1096 single tongue method A-1. The test piece is 50 mm wide × 250 mm long. Since the fineness of the warp and the weft is the same, the net of the present invention can be torn in any direction, but when the fineness is different, the test piece is prepared so that the finer fineness fiber is torn.

<45 ° tear strength>
Although not specified in the industry standard, it is the same as the method for measuring the normal tear strength, except that a test piece in which the fiber in the test piece is inclined by 45 ° with respect to the horizontal surface of the gripping chuck of the tester is used. .

<Tensile strength>
Conforms to JIS L 1096. The distance between chucks was 100 mm, and the test speed was 100 mm / min. The test piece is about 10 mm wide by 300 mm long. In addition, since the width of the test piece used in the tensile test is manufactured so that 10 fibers are arranged in the length direction, the width varies depending on the fineness and the density of the fibers (weave).

<45 ° tensile strength>
Although not specified in the industry standard, it is the same as the method for measuring the tensile strength described above, except that a test piece in which the fibers in the test piece are inclined by 45 ° with respect to the gripping chuck horizontal plane of the tester is used. . The width of the test piece used in this test is in the state where the fiber is inclined, and it is difficult to set the width for 10 fibers. Prepare to be the same as the length.

  All the tear strength and tensile strength were measured using a TS-2632 type Unicorn II general-purpose testing machine manufactured by Ueshima Seisakusho Co., Ltd. Five test pieces were prepared for each test, and the result was an average of five measurements.

  The composition of the composite monofilament used in the present invention is described below. Although some pigments are used, specific colors will be described later in Table 1. Spinning was performed by a known melt spinning method.

<Synthetic monofilament spinning 1>
Composite monofilament (fiber A) having a sheath component of ethylene / propylene / butene-1 copolymer having a melting point of 138 ° C., a core component of polypropylene having a melting point of 171 ° C., a sheath core ratio of sheath: core = 35: 65, and a fineness of 320 dtex. A composite monofilament (fiber B) having a fineness of 560 dtex was obtained. The sheath-core ratio was common.

[Example 1 and Comparative Example 1]
Using the obtained fibers A and B, a net having the structure shown in Table 1 was woven and knitted, and heat-treated at a temperature at which the fiber intersections could be thermally bonded to obtain an evaluation net.

  Using the net obtained in Example 1, the concealment effect was evaluated. The evaluation results are shown in Table 2.

  The concealment effect was confirmed with the net of the present invention.

  The total light transmittance was evaluated using the net obtained in Example 1. The evaluation results are shown in Table 3.

  The net of the present invention was able to obtain an appropriate light shielding rate.

  Using the nets obtained in Example 1 and Comparative Example 1, the tear strength, 45 ° tear strength, tensile strength, and 45 ° tensile strength were measured. The results are shown in Table 4.

  The light-shielding net of the present invention is a net having an appropriate light-shielding rate and concealment effect, and can be suitably used for, for example, a light-shielding screen or a concealment prevention concealment screen.

  1 ... warp, 2 ... weft

Claims (5)

A net in which a sheath-core type heat-adhesive composite monofilament with a fineness of 300 to 800 dtex is densely woven and knitted as warp and weft, and the warp and weft have the same fineness, and the ratio of the number of warps and wefts per inch However, a net having a tear strength of 70 N or more, which is densely woven and knitted in the range of 1.6 to 2.6 on the basis of the smaller number of driving , and the intersection of warp and weft is thermally bonded.   The sheath-core thermoadhesive composite monofilament is composed of a low-melting point thermoplastic resin having a melting point difference of 15 ° C. or higher and a high-melting point thermoplastic resin, and the sheath-core ratio is in the range of sheath: core = 20: 80-60: 40 by weight ratio. The net according to claim 1, wherein The net according to claim 1 or 2 , wherein the light shielding ratio is 60% or more and 85% or less. The net according to any one of claims 1 to 3 , wherein the tensile strength is 140 N or more and the 45 ° tensile strength is 70 N or more. An article using the net according to any one of claims 1 to 4 .