JP2013252468A - Collection net - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a collection net with high efficiency of collection of airborne dust.SOLUTION: A collection net includes a net base material 1, and an adhesive 2 which is applied to the net base material 1. The net base material 1 includes a plurality of longitudinal net legs 11 which are formed by passing through adjacent loops to longitudinally connect the loops to each other and which are longitudinally elongated almost in parallel with one another, and a plurality of lateral net legs 12 which are laterally elongated to connect a section between the adjacent longitudinal net legs 11. A quadrangular mesh 10 is formed between the pair of longitudinal net legs 11 and the pair of lateral net legs 12. Two or more pieces of insertion weft 13 are laterally elongated in each mesh 10. The two or more pieces of insertion weft 13 are arranged at almost regular intervals between the longitudinal net legs 11 facing each other with the mesh 10 in between so as to separate the meshes 10 into approximately rectangular space parts 100 at almost regular intervals. The apparent diameter of the insertion weft 13 is smaller than the apparent diameter of the longitudinal and lateral net legs 11 and 12.

Description

  The present invention relates to a collection net for collecting dust such as dust in the air.

  In precision machine manufacturing factories, electrical component manufacturing factories, food processing factories, etc., dust floating in the air causes deterioration of product quality. For this reason, the collection net | network which collects dust is extended in the factory. The dust floating in the air in the factory is dust, paint mist, fiber scrap, industrial fine powder, etc., and most of them are on the order of several μm to several tens of μm.

Conventionally, the inventor has repeatedly pursued earnestly, and has developed a collection net that is deployed in the factory. The collection net is required to have high dust collection efficiency. Furthermore, in the factory, since it is expanded with a size of several m ² to several tens m ² , strength for maintaining the shape and structure is required. For example, as disclosed in Patent Document 1, a collection net having high collection efficiency for dust and the like has been developed by applying an adhesive to a net substrate. As disclosed in Patent Document 2, the collection efficiency was further improved by dividing the mesh of the net base material into an oblique shape or a cross shape.

JP 2002-233800 A JP 2004-314008 A

  The inventor has made various improvements and has developed a collection net with higher dust collection efficiency. In particular, the development of a collection net was aimed at focusing on efficiently collecting dust in a state close to no wind speed in a room or in a breeze.

  This invention is made | formed in view of this situation, and makes it a subject to provide the collection net | network with high collection efficiency of the dust which floats in the air.

  The inventor has paid attention to the arrangement and configuration of the yarns that divide the mesh of the collection net in order to efficiently collect the dust in a dust collection efficiency, particularly in a state close to no wind speed in the room or in a breeze state.

  (1) The collection net of the present invention is formed by connecting loops to each other in the vertical direction by passing through adjacent loops, and a plurality of vertical net legs extending in the vertical direction substantially parallel to each other, and extending in the horizontal direction and adjacent to each other. A plurality of horizontal mesh legs connected between the vertical mesh legs, and a square mesh is formed between the pair of opposed vertical mesh legs and the pair of opposed horizontal mesh legs. A net comprising a net base material and a pressure-sensitive adhesive applied to the net base material, wherein the net base material further includes a vertical net leg and a horizontal net leg in each mesh. Two or more transverse insertion yarns each having an apparent diameter smaller than any apparent diameter are extended in the transverse direction, and the two or more transverse insertion threads are opposed to each other with the mesh therebetween. By being arranged at approximately equal intervals between the vertical mesh legs, At substantially regular intervals the mesh between the longitudinal network leg, characterized in that the length of the lateral direction than the mesh are separated to the space portion of the relatively long substantially rectangular shape than longitudinal length.

  The most excellent operation and effect of the collection net of the present invention is to collect dust contained in the air most effectively by filtering the air. For this reason, the net legs and nets constituting the net base material per unit area are required to come into contact with air to the maximum extent and to collect dust by filtering. For this purpose, the entire net base is made to be as small as possible in air resistance, but is not reversed before the net base. Moreover, it is preferable to reduce the mesh aperture ratio. In order to reduce the air resistance of the entire net base material and to maintain the net base material shape that can withstand use, the net thread and the net legs are strengthened, and the opening ratio of the net base material is reduced to reduce dust. Increasing the contact area is a contradictory element. In order to solve this problem, the present invention increases the air resistance, but reduces the number of vertical mesh legs indispensable for maintaining the shape and strength of the net substrate as much as possible per unit area. The number of horizontal mesh legs, which is a large air resistance element, is reduced, and the net base material is composed of a finer mesh insertion thread (horizontal insertion thread) with less air resistance, and the mesh opening ratio is reduced. By doing so, the dust collection performance was effectively improved.

  In particular, dust filtration is most effective at low wind speeds (breeze or no wind) because the contact resistance between the collection net and dust-containing air is low and the contact area between the collection net and dust-containing air is large. Is good. In order to satisfy these two conflicting requirements, the collection net of the present invention has an optimal configuration.

  That is, the opening area through which air passes is dispersed in the plurality of spaces by partitioning the mesh with the lateral insertion thread. For this reason, the probability that dust will be filtered will be much greater than if one large opening area is formed in the mesh. For this reason, air can be passed through even in a state close to no wind speed in the room or in a breeze. Therefore, the dust floating in the room can be effectively collected by extending the collection net in the room.

  The mesh is divided into a plurality of space portions substantially evenly by the lateral insertion thread, so that the shape of the space portion is a relatively elongated and substantially rectangular shape. For this reason, the distance between long sides which oppose becomes narrow, and it becomes easy to collect dust on a long side. In addition, since the distance between the long sides is almost the same in any part of the space part, the dust collection efficiency in the entire space part is increased.

  The apparent diameter of the horizontal insertion thread is apparently smaller than the apparent diameter of the vertical mesh legs and the horizontal mesh legs. For this reason, it is possible to secure a sufficient amount of air circulation in the space while maintaining the strength of the collection net between the horizontal screen legs and the vertical screen legs to some extent. Therefore, the collection efficiency of dust in the air can be increased.

  (2) Further, the net base material further includes an oblique insertion thread having an apparent diameter smaller than the apparent diameter of each of the vertical mesh legs and the horizontal mesh legs in each of the space portions. Preferably, the space portion is extended obliquely with respect to the direction, and the space portion is divided into a plurality of narrow space portions by the oblique insertion thread.

  In order to extend the horizontal insertion thread in each mesh in the horizontal direction, it is necessary to pass the horizontal insertion thread through a pair of loops positioned at the same height of the opposite vertical mesh legs. For this reason, the number of transverse insertion yarns that can be arranged in each mesh is limited by the number of vertical mesh leg loops that form each mesh.

  Therefore, as a method for further reducing each space portion, each space portion is partitioned by an oblique insertion thread extending obliquely with respect to the extending direction of the lateral insertion thread. This is because the vertical mesh leg loop can be overlapped with the horizontal insertion thread and the diagonal insertion thread on the braid. In this case, the diagonally inserted yarn does not overlap the laterally inserted yarn in the space portion, and further partitions the space portion into a plurality of narrow spaces. Therefore, the mesh is further subdivided compared to the case where the mesh is partitioned only by the lateral insertion thread. For this reason, there are many opportunities for dust to be collected in the lateral insertion thread and the diagonal insertion thread.

  The apparent diameter of the diagonally inserted thread is apparently smaller than the apparent diameter of the vertical and horizontal mesh legs. For this reason, the flow of air passing through the mesh is not hindered. Therefore, it is possible to increase the number of yarn portions where dust is collected while sufficiently ensuring air circulation. Therefore, dust collection efficiency is increased.

  (3) It is preferable that the length of the said horizontal mesh leg which forms the said mesh is larger than the length of the said vertical mesh leg which forms the said mesh. In this case, the distance between the pair of vertical mesh legs opposed across the mesh is larger than the distance between the pair of horizontal mesh legs opposed across the mesh, and the mesh exhibits a rectangle wider in the horizontal direction than in the vertical direction. . Therefore, the number of vertical mesh legs that are indispensable for maintaining the strength of the net substrate can be reduced as much as possible per unit area, and the air resistance can be reduced.

  (4) The transverse insertion yarn is preferably made of a monofilament of 350 to 1000 denier. In this case, while maintaining the strength of the lateral insertion yarn high, it is possible to secure a sufficient air flow rate in the space and improve the dust collection efficiency.

  (5) It is preferable that the oblique insertion yarn is made of a monofilament of 350 to 1000 denier. In this case, while maintaining the strength of the oblique insertion yarn high, it is possible to sufficiently secure the air flow rate in the narrow space and improve the dust collection efficiency.

  (6) The aperture ratio of the collection net is preferably 10 to 80%. In this case, the dust collection rate can be effectively increased.

  In addition, by inserting relatively thin insertion threads (lateral insertion threads, slant insertion threads) in this way, the mesh shape takes a relatively large distance between the vertical mesh legs, and the net substrate unit The amount of vertical screen legs used per area can be reduced. The filtration effect can be enhanced and the dust collecting effect can be enhanced so as not to disturb the air resistance while forming more narrow spaces in the space in the mesh.

  According to the collection net of the present invention, the vertical insertion legs constituting each mesh and the horizontal insertion thread having an apparent diameter smaller than that of the horizontal mesh legs are arranged in a substantially rectangular space by arranging the meshes in the horizontal direction. Therefore, the collection efficiency of dust floating in the air can be increased.

It is a partial front view of the collection net of Examples 1 and 1A of the present invention. It is a partial front view of the collection net of Example 2. It is a partial front view of the collection net of Example 3. It is a partial front view of the collection net of Example 4. It is a partial front view of the collection net of Comparative Examples 1 and 1A. It is a partial front view of the collection net of the comparative example 2. It is a partial front view of the collection net of the comparative example 3.

  The collection net according to the embodiment of the present invention will be described in detail.

  The collection net has a net base material and an adhesive applied to the net base material. The net substrate has vertical screen legs extending in the vertical direction and horizontal screen legs extending in the horizontal direction. The vertical mesh legs and the horizontal mesh legs intersect in a lattice pattern, and a mesh is formed between the pair of opposite vertical mesh legs and the pair of opposite horizontal mesh legs. In the mesh, two or more transverse insertion yarns extend in the transverse direction.

  The vertical screen legs are formed by connecting the loops in the vertical direction by passing through adjacent loops. The vertical screen legs are composed of a plurality of loops that are continuous in the vertical direction. A plurality of loops are connected in a chain by passing through other adjacent loops in each loop. Long vertical legs are formed by connecting the loops.

  The yarn constituting the vertical mesh legs may be monofilament or multifilament. When the yarn constituting the vertical mesh leg is a multifilament, either a non-twisted yarn or a twisted yarn may be used.

  The horizontal mesh legs connect the vertical mesh legs in the horizontal direction to form a substantially square mesh. The horizontal net legs may be formed by connecting the loops in the vertical direction by passing through adjacent loops, or may extend linearly without forming the loops. The yarn constituting the horizontal net legs may be monofilament or multifilament. When the yarn constituting the horizontal mesh leg is a multifilament and extends linearly, either a non-twisted yarn or a twisted yarn may be used.

  The vertical mesh legs are formed by passing the loops adjacent to each other in terms of the braided structure, thereby connecting the loops to each other in the vertical direction, and thus it is necessary to achieve the shape maintenance and strength maintenance of the entire net base material. Since the vertical screen legs have such a loop configuration, the apparent diameter is inevitably thicker than the horizontal screen legs. Moreover, on the other hand, the net base material must satisfy the conflicting condition of minimizing the blockage of air. For this reason, it is desirable to keep the distance between the vertical mesh legs as large as possible while maintaining the knitted fabric strength. That is, the interval between the vertical screen legs is preferably equal to or greater than that of the horizontal screen legs.

  The transverse insertion yarn extends two or more laterally in the mesh. The lateral insertion thread is composed of a vertical mesh leg and a thread having an apparent diameter smaller than that of the horizontal mesh leg. The transverse insertion yarn may be monofilament or multifilament. Further, the lateral insertion thread may be formed by passing through adjacent loops so that the loops are connected to each other in the longitudinal direction, or may extend linearly without forming a loop.

  Here, the apparent partial diameter of the horizontal insertion thread is apparently smaller than the apparent partial diameters of the vertical mesh legs and the horizontal mesh legs. The ratio (D2 / D1) of the apparent split diameter D2 of the horizontal insertion thread to the apparent split diameter D1 of the horizontal net legs is preferably 0.1 to 0.9, and more preferably 0.2 to 0.75. desirable. When the ratio (D2 / D1) is too small, the strength of the lateral insertion thread may be reduced and may break, and when the ratio (D2 / D1) is excessive, the lateral insertion thread is too thick. Thus, air circulation may be hindered and dust collection efficiency may be reduced.

  The apparent diameter of the vertical screen legs is preferably larger than the apparent diameter of the horizontal screen legs. The apparent diameter D0 of the vertical mesh legs is preferably 0.5 to 2.0 mm, and more preferably 1 to 1.5 mm. In this case, the strength of the net substrate can be maintained without increasing the air resistance, and the entire collection net can be formed satisfactorily.

  The apparent diameter D1 of the horizontal net legs is preferably 0.3 to 1.5 mm, and more preferably 0.4 to 1.0 mm. The apparent diameter D2 of the lateral insertion yarn is preferably 0.15 to 0.4 mm, and more preferably 0.2 to 0.3 mm.

  The transverse insertion yarn is preferably made of a monofilament. The transverse insertion yarn is preferably made of a monofilament of 350 to 1000 denier, and more preferably made of a monofilament of 400 to 600 denier. This is because if the monofilament is too thin, the rigidity of the transverse insertion yarn is low, and if the monofilament is too thick, the air flow is hindered and the dust collection efficiency is reduced.

  A plurality of vertical screen legs extend in parallel to each other in the vertical direction. Here, “parallel to the vertical direction” means that the vertical screen legs extend within a range of ± 15 ° with respect to the vertical direction. Further, a plurality of horizontal net legs extend in parallel to each other in the horizontal direction. Here, “parallel to the horizontal direction” means that the horizontal screen legs extend within a range of ± 15 ° with respect to the horizontal direction. The extending direction of the vertical screen legs is the vertical direction, and is perpendicular to the horizontal direction that is the extending direction of the horizontal screen legs.

  Further, the lateral insertion thread extends in the lateral direction, and the extending direction of the lateral insertion thread is parallel to the extending direction of the lateral net legs. Here, “parallel to the extending direction of the horizontal screen legs” means that the horizontal insertion thread extends within a range of ± 15 ° with respect to the extending direction of the horizontal screen legs.

  The vertical mesh legs and the horizontal mesh legs intersect with each other in a lattice shape to form a mesh having a substantially square shape. In the vertical direction of the mesh, a pair of horizontal screen legs are opposed to each other. In the horizontal direction of the mesh, a pair of vertical mesh legs are opposed to each other. In each mesh, two or more transverse insertion yarns extend in the lateral direction, and the mesh is divided into three or more spaces. The lateral insertion yarns are arranged at substantially equal intervals between the vertical mesh legs facing each other across the mesh, thereby dividing the mesh into substantially equal space portions.

  The number of transverse insertion yarns separating each mesh may be 2 or more, for example, 2 or more and 7 or less, and more preferably 2 or more and 5 or less. The number of transverse insertion yarns separating each mesh is limited to the number of vertical mesh leg loops constituting each mesh. When the loop of the vertical mesh legs constituting each mesh is 4, the number of lateral insertion yarns separating each mesh is 2 or more and 4 or less. When the loop of the vertical mesh legs constituting each mesh is 6, the number of transverse insertion yarns separating each mesh is 2 or more and 6 or less. Thus, the greater the number of vertical mesh leg loops that constitute each mesh, the greater the number of transverse insertion threads that divide each mesh.

  In general, it is preferable that each mesh has a substantially square shape or a horizontally long substantially rectangular shape. Furthermore, for example, the mesh may be a substantially rectangular shape that is large in the lateral direction within a range that maintains the shape and strength of the net base material. By arranging two or more transverse insertion yarns extending in the transverse direction at equal intervals in each mesh, each stitch is partitioned into a substantially rectangular space.

  Each space portion has a substantially rectangular shape including a pair of long sides arranged vertically and a pair of short sides arranged horizontally. The pair of long sides is composed of a lateral insertion thread and a lateral insertion thread, or a lateral insertion thread and a lateral web leg. The pair of short sides is composed of a pair of vertical mesh legs facing each other. In the rectangular space, the distance between the long sides facing each other is short, so that dust is easily collected.

  The ratio (L2 / L3) of the length L2 in the vertical direction of the space portion to the length L3 in the horizontal direction of the space portion is preferably 1 or less, and preferably 1/2 or less. When the square mesh is divided at approximately equal intervals by two or more transverse insertion yarns, the above ratio is about 1/3. When the horizontally long rectangular mesh is divided at equal intervals by two or more horizontally inserted yarns, the ratio becomes more than 1/3. When the ratio exceeds 1, the number of vertical mesh legs constituting the mesh is too small, and the strength of the net substrate may be reduced. The ratio (L2 / L3) is preferably 1/6 or more. If the ratio is too small, the adhesive film will block the space and prevent air flow. There is a risk that the dust collection rate may decrease.

  Moreover, it is preferable that the length L2 of the vertical direction of a space part is 0.5-2 mm. If the length L2 in the vertical direction of the space part is too long, the space part becomes large and the dust collection efficiency may be reduced. If the length L2 in the vertical direction of the space portion is too short, air resistance is generated when the space portion is too narrow to pass through the collection net, air flow becomes worse, and dust collection efficiency may be reduced. There is. In addition, the coating of the adhesive to be applied is excessively formed and fills the space in the vertical direction to make the air flow worse, and the dust collection efficiency may be reduced.

  The length L3 of the horizontal net legs constituting each mesh is preferably 4.0 to 15 mm, and more preferably 4.5 to 10 mm. If the length L3 of the horizontal mesh legs is too small (if the interval between the vertical mesh legs is too small), the shape and strength of the net base material can be maintained, but on the other hand, the vertical mesh legs having a large apparent diameter. The air resistance per unit area of the net base material is dramatically increased. Therefore, the air flow becomes worse, and the dust collection efficiency may be significantly reduced. If the length L3 of the horizontal mesh legs is too long (if the distance between the vertical mesh legs is too wide), the formation of the mesh becomes unstable, and the strength of the net base material may be reduced, making it difficult to withstand use.

The area of the space formed by dividing the mesh is preferably 3 mm ² or more and 21 mm ² or less, and more preferably 3.5 mm ² or more and 10 mm ² or less. When the area of the space portion is too small, the pressure-sensitive adhesive covers the space portion in a film shape, and there is a possibility that the air flow rate is reduced. If the area of the space is excessive, much of the dust may pass and the trapping effect may be reduced.

  In order to arrange the horizontal insertion thread in the mesh, the horizontal insertion thread is connected to a loop having the same vertical position among the plurality of loops connected in the vertical direction between adjacent vertical mesh legs. For this reason, the number of transverse insertion yarns that can be arranged in each mesh depends on the number of loops of vertical mesh legs that surround each mesh. For this reason, it is possible to arrange a number of transverse insertion yarns equal to the number of loops at the maximum in the mesh. Furthermore, when it is desired to partition the space part into small parts, it is preferable to divide the space part with an oblique insertion thread.

  That is, it is preferable that the net base material is further provided with an oblique insertion thread extending obliquely with respect to the lateral direction in the space. Thereby, a space part is divided into plurality and it becomes easy to collect dust. One or more oblique insertion threads are arranged in each space. When two or more oblique insertion yarns are arranged in each space portion, each oblique insertion yarn in each space portion may extend obliquely with respect to the lateral direction in parallel to each other, or at different angles. You may extend in the diagonal direction. Further, the oblique insertion yarns may intersect in an X shape within the space. The oblique insertion thread may divide all of the plurality of space portions in the mesh into a plurality of pieces, or may divide a part of the plurality of space portions in each mesh into a plurality of pieces.

  In order to dispose the diagonally inserted yarn in the space, the diagonally inserted yarn is connected to loops having different positions in the vertical direction among a plurality of loops connected in the vertical direction between adjacent vertical legs. Even if the horizontal insertion yarn is connected to all of the loops, the space portion partitioned by the horizontal insertion yarn can be subdivided into a narrower narrow space portion by the diagonal insertion yarn. The smaller the space in the mesh is, the higher the dust collection efficiency.

  The apparent diameter of the oblique insertion thread is smaller than the apparent diameter of either the vertical mesh leg or the horizontal mesh leg, as is the apparent diameter of the horizontal insertion thread. The apparent split diameter of the diagonally inserted thread may be smaller than the vertical mesh legs and the horizontal mesh legs, and may be the same as the apparent split diameter of the horizontally inserted thread, or may be larger than the apparent split diameter of the horizontally inserted thread, or It may be smaller than the apparent diameter of the lateral insertion thread.

  The ratio (D3 / D1) of the apparent split diameter D3 of the oblique insertion thread to the apparent split diameter D1 of the horizontal net legs is preferably 0.1 to 0.9, and more preferably 0.2 to 0.75. desirable. The apparent diameter D3 of the oblique insertion yarn is preferably 0.15 to 0.4 mm, and more preferably 0.2 to 0.3 mm.

  The oblique insertion yarn may be monofilament or multifilament. Further, the oblique insertion thread may be formed by connecting the loops by passing through adjacent loops, or may extend linearly without forming a loop.

  The oblique insertion yarn is preferably made of a monofilament. Further, the oblique insertion yarn is preferably made of a monofilament of 350 to 1000 denier, and more preferably made of a monofilament of 400 to 600 denier. This is because when the monofilament is too thin, the slanted insertion yarn has low rigidity, and when the monofilament is too thick, air circulation is hindered and dust collection efficiency is reduced.

  The material of the yarn constituting the net base material, that is, the material of the longitudinal mesh legs, the transverse mesh legs, and the transverse insertion threads, and the material of the oblique insertion threads may be light in specific gravity. For example, the specific gravity is preferably 2 or less. By configuring the net base material with light yarn, the weight of the collection net can be reduced. The yarn constituting the net base material is preferably made of a synthetic resin material made of a thermoplastic resin such as polyvinylidene chloride, polyvinyl chloride, polyolefin, polyester, and polyamide (nylon). Among them, when polyvinylidene chloride and polyvinyl chloride are used, they are superior in flame resistance and mesh shape maintenance compared to polyamide and polyolefin, etc., and even if dust adheres, they do not hinder reuse. It is extremely easy to reuse and has the highest utility value. When polyolefin or polyamide is used, the handling and strength are improved.

  An adhesive is applied to the net base material. The adhesive is attached to the vertical mesh legs, the horizontal mesh legs, and the horizontal insertion thread. In the case where the net base material has an oblique insertion thread, the adhesive is also attached to the oblique insertion thread. Further, it is preferable that a film of the adhesive is randomly formed on at least part of the loops of the vertical mesh legs, the threads of the horizontal mesh legs, and the threads of the horizontal insertion thread.

  By adjusting the viscosity of the adhesive at the time of application, the film forming area of the adhesive applied to the mesh can be made somewhat, and as a result, the aperture ratio of the collection net can be adjusted more finely. The aperture ratio of the collection net refers to the ratio (percentage) of the area of the portion through which air can pass with respect to the entire area in the plane direction when the collection net is developed.

  When the area of the portion through which the air of the collection net can pass is defined as the opening area, the ratio of the opening area to the total area of the collection net, that is, the opening ratio of the collection net is 10 to 80%. Preferably, it is 15 to 55%. The portion through which air can pass refers to an opening through which air can pass, including the space. In this case, it is possible to increase the chances of adhesion of dust to the pressure-sensitive adhesive while ensuring a sufficient amount of air flow. Moreover, even when the aperture ratio of the collection net deviates from the above range, the indoor dust collection effect is sufficient.

As the pressure-sensitive adhesive, acrylic, natural rubber, SBR, block SIS, silicon rubber or the like is preferably used because of high adhesive force and a long adhesion duration. Moreover, the following range is good as the performance.
・ Adhesive strength (g) 200-700 (conforms to JIS Z0237)
・ P. Tack (g) 200-700 (conforms to JIS Z0237 reference column)
・ Peeling force (g) 5-20 (conforms to JIS Z0237)
・ Ball tack 5-20 (conforms to JISZ0237)
The method of using the collection net is the same as that of the conventional example, but in this case, it is cut into dimensions according to the use location. In addition, the net base material hangs down like a curtain in the painting factory. In this case, it is possible to use only a single collection net, but it is also possible to use two or three sheets in a stacked state. There is also a way to stretch the mesh. There may be a combination of net base materials having different mesh void areas in a plurality of layers.

Example 1
The collection net of Example 1 of this invention consists of the net base material 1 and the adhesive 2 apply | coated to the net base material 1, as shown in FIG. The net substrate 1 has a plurality of vertical screen legs 11 extending in the vertical direction and a plurality of horizontal screen legs 12 extending in the horizontal direction, and between a pair of opposite vertical screen legs 11 and a pair of opposite horizontal screen legs. A mesh 10 is formed between the two. A large number of meshes 10 are arranged in a lattice pattern in the vertical direction and the horizontal direction of the net substrate 1. Each mesh 10 has a length L1 in the vertical direction of 4.5 mm and a length L3 in the horizontal direction of 4.5 mm, and has a substantially square shape.

  The yarn for knitting the net substrate 1 is made of monofilament spun from polyvinylidene chloride. The net substrate 1 is knitted by Russell weaving. The vertical mesh legs 11 are configured by forming loops connected to each other by a single monofilament.

  The vertical mesh legs 11 are formed by connecting loops to each other in the vertical direction by passing through adjacent loops. The plurality of vertical mesh legs 11 extend in the vertical direction substantially parallel to each other. The number of loops of the vertical mesh legs 11 constituting the mesh 10 per unit is four.

  The horizontal mesh leg 12 is composed of two monofilaments. The two monofilaments constituting the horizontal screen legs 12 are connected to the loops of the same height of a pair of opposing vertical screen legs 11. The two monofilaments are not twisted together but overlap each other and extend in the same direction to form the horizontal net legs 12. The apparent diameter D0 of the vertical mesh leg 11 is 1.0 mm. The apparent diameter D1 of the horizontal mesh leg 12 is 0.5 mm.

  In each mesh 10, two lateral insertion threads 13 extend in the lateral direction. The apparent diameter D2 of the monofilament constituting the transverse insertion yarn 13 is 0.25 mm. The ratio (D2 / D1) of the apparent split diameter D2 of the horizontal insertion thread 13 to the apparent split diameter D1 of the horizontal net leg 12 is 0.5. The two transverse insertion yarns 13 are each composed of one monofilament.

  The lateral insertion thread 13 extends in parallel to the lateral net legs 12. The two horizontal insertion threads 13 are connected to the loop of the vertical mesh legs 11 at equal intervals, thereby dividing the mesh 10 into three at equal intervals in the vertical direction. That is, of the fourth loop of the vertical mesh legs 11 constituting each mesh 10, the lateral insertion yarns 13 are connected to the second and third on the center side.

  Each mesh 10 is divided at equal intervals in the vertical direction by two horizontal insertion threads 13 and partitioned into three substantially rectangular space portions 100. The length L2 in the vertical direction of each space portion 100 is 1.5 mm, and the length in the horizontal direction of the space portion 100 is equal to the length L3 in the horizontal direction of the mesh 10. The ratio (L2 / L3) of the length L2 in the vertical direction to the length L3 in the horizontal direction of the space portion 100 is 0.3.

  An adhesive 2 is applied to the net substrate 1. The pressure-sensitive adhesive 2 is made of an acrylic pressure-sensitive adhesive. In order to apply the pressure-sensitive adhesive 2 to the net substrate 1, the pressure-sensitive adhesive is dissolved in the binder so as to have a predetermined viscosity, and the net substrate is passed through the solution and dried. The adhesive 2 is attached to the vertical mesh legs 11, the horizontal mesh legs 12, and the horizontal insertion threads 13 of the net base material 1, and also inside the loop of the vertical mesh legs 11 and between the two monofilaments of the horizontal mesh legs 12. Are also randomly attached to at least a part of the film. The aperture ratio of the collection net formed by applying the adhesive 2 to the net substrate 1 was set to 35%.

  When the collection net of this example is extended indoors, indoor air passes through the space 100 formed in the net substrate 1. When passing through the space 100, dust in the air is reliably captured by the net base material 1 due to the adhesive force of the adhesive 2.

Example 1A
The collection net of this example is formed by applying a pressure-sensitive adhesive 2 with increased viscosity at the time of application to a net substrate 1 having the same network configuration as that of Example 1. The adhesive is randomly attached to the vertical mesh legs 11, the horizontal mesh legs 12, and the horizontal insertion threads 13 of the net substrate 1. The aperture ratio of the collection net was 25%.

(Example 2)
In the collection net of this example, as shown in FIG. 2, the mesh 10 formed on the net base 1 is divided into three substantially rectangular spaces 100 in the vertical direction by two horizontal insertion threads 13. It is divided into. Of the three space portions 100, the upper and lower space portions 100 are each divided into two narrow space portions 101 by oblique insertion threads 14 extending obliquely with respect to the lateral insertion thread 13.

  In FIG. 2, the left side of the oblique insertion thread 14 that divides the upper space 100 is connected to the first loop from the top of the left vertical mesh leg 11, and the right side of the oblique insertion thread 14 is the right vertical mesh leg 11. Is connected to the second loop from the top. The left side of the diagonal insertion thread 14 that divides the lower space 100 is connected to the first loop from the bottom of the left vertical mesh leg 11, and the right side of the diagonal insertion thread 14 is from the bottom of the right vertical mesh leg 11. It is connected to the second loop.

  The horizontal net legs 12 forming the mesh 10 are made of three monofilaments, and the horizontal insertion thread 13 is made of one monofilament. In FIG. 2, the horizontal mesh leg 12 and the diagonally inserted thread 14 are connected to the first loop from the top and the first loop from the bottom on the left vertical mesh leg 11, and the second and third from the top. A transverse insertion thread 13 is connected to the second loop. The horizontal insertion thread 13 and the diagonal insertion thread 14 are connected to the second loop from the top and the second loop from the bottom on the right vertical mesh leg 11, and the first from the top and the first from the bottom. A horizontal mesh leg 12 is connected to the loop. The aperture ratio of the collection net was 25%. Others are the same as in the first embodiment.

  In the collection net of the second embodiment shown in FIG. 2, the space portion of the collection net of the first embodiment is further divided into a plurality of pieces by the oblique insertion thread 14. For this reason, the opening area of the collection net of the second embodiment is narrower than that of the first embodiment, and is collected by the oblique insertion thread 14, the lateral insertion thread 13, the lateral net legs 12 and the vertical net legs 11.

  In the second embodiment, the diagonal insertion yarns 14 are arranged in the upper and lower space portions of the three space portions 100 formed in each mesh 10, but the diagonal insertion yarns 14 are also inserted in the middle space portion 100. It may be arranged.

(Example 3)
As shown in FIG. 3, the collection net of this example is different from the first embodiment in that the horizontal mesh legs 12 constituting the mesh 10 are longer than the vertical mesh legs 11. The mesh 10 is a rectangle that is long in the horizontal direction, the length L1 of the vertical mesh legs 11 is 4.5 mm, the length L3 of the horizontal mesh legs 12 is 6.0 mm, and the length L1 of the vertical mesh legs 11 is. The ratio (L3 / L1) of the length L3 of the horizontal screen leg 12 to the horizontal half is 1.5. The ratio (L2 / L3) of the length L2 in the vertical direction to the length L3 in the horizontal direction of the space portion 100 is 1/4 (4.5 mm ÷ 3 / 6.0 mm). In the mesh 10, two lateral insertion yarns 13 extending in the lateral direction are arranged at equal intervals to divide the mesh 10 into three space portions 100. The space 100 has a rectangular shape that is relatively longer in the lateral direction than the mesh 10.

  The adhesive 2 is attached to the vertical mesh legs 11, the horizontal mesh legs 12, and the horizontal insertion threads 13. The aperture ratio of the collection net is 37%.

Example 4
As shown in FIG. 4, the collection net of this example is different from the second embodiment in that the horizontal mesh legs 12 constituting the mesh 10 are longer than the vertical mesh legs 11. The size, shape, and L1, L2, and L3 of the mesh 10 are the same as those in the third embodiment. The lateral insertion thread 13 and the diagonal insertion thread 14 that divide the mesh 10 are the same as in the second embodiment. The adhesive 2 is attached to the vertical mesh legs 11, the horizontal mesh legs 12, and the horizontal insertion threads 13. The aperture ratio of the collection net is 27%.

(Comparative Example 1)
As shown in FIG. 5, the collection net of this comparative example is the same as the collection net of Example 2 except that there is no lateral insertion thread and oblique insertion thread. The net substrate 1 is composed only of vertical screen legs 11 and horizontal screen legs 12. A mesh 10 is formed between a pair of opposing vertical mesh legs 11 and a pair of opposing horizontal mesh legs 12. The aperture ratio of the collection net was 35%.

(Comparative Example 1A)
The collection net of this comparative example is formed by applying an adhesive having increased viscosity to a net base material having the same net configuration as that of comparative example 1. The adhesive is randomly (irregularly) attached to the vertical mesh legs 11, the horizontal mesh legs 12, and the horizontal insertion threads 13 of the net substrate 1. The aperture ratio of the collection net was 25%.

(Comparative Example 2)
As shown in FIG. 6, the collection net of this comparative example has no lateral insertion thread, and the collection net of Example 2 is that two diagonal insertion threads 14 divide the mesh 10 into two. It is the same.

  In this comparative example, the vertical mesh legs 11 constituting the mesh 10 form the mesh 10 with four loops. In FIG. 4, the left side of the oblique insertion thread 14 is connected to the second loop from the top of the vertical mesh leg 11, and the right side is connected to the second loop from the bottom of the other vertical mesh leg 11. The aperture ratio of the collection net was 32%. Others are the same as in the second embodiment.

(Comparative Example 3)
As shown in FIG. 7, the collection net of this comparative example has no lateral insertion yarn, and the mesh 10 is divided into two X-shaped insertion yarns 14 that are a combination of two, so that the embodiment 2 It is different from the collection 7 net. In FIG. 5, the left side of one diagonal insertion thread 14 is connected to the second loop from the top of the vertical mesh leg 11, and the right side of one diagonal insertion thread 14 is the second from the bottom of the other vertical mesh leg 11. It is connected to the loop. The left side of the other diagonal insertion thread 14 is connected to the second loop from the bottom of the vertical mesh leg 11, and the right side of the other diagonal insertion thread 14 is connected to the second loop from the top of the other vertical mesh leg 11. Has been. The two X-shaped oblique insertion threads 14 divide the mesh 10 into four. The aperture ratio of the collection net was 25%. Others are the same as in Comparative Example 2.

(Comparative Example 4)
In this comparative example, an adhesive is applied to both the front and back surfaces of the film. There are no openings in the film.

<Experimental example 1>
A collection net having a mesh (Examples 1, 2, 3, 4 and Comparative Examples 1, 2, 3), a filter formed of a nonwoven fabric, and a film having no holes (Comparative Example 4) are placed indoors. When spreading, the behavior of dust in the air was observed by video shooting.

  In any of the collection nets of Examples 1, 2, 3, and 4 and Comparative Examples 1, 2, and 3, because the net was formed on the net base material, dust in the air was sucked into the collection net. . Whether the air is flowing gently like natural wind (for example, wind speed 0.3 to 1.0 m / sec) or no wind, the air in the vicinity of the collection net approaches the collection net, and the air The dust inside was collected on the collection net. The presence of the collection net did not interfere with the air flow. The air passed through the mesh of the collection net without being disturbed by the collection net. When the air passed through the mesh, dust in the air was caught by the vertical mesh legs, the horizontal mesh legs, and the horizontal insertion threads constituting the mesh. Since the adhesive was attached to the vertical mesh legs, the horizontal mesh legs, and the horizontal insertion threads, the dust stayed on the net base material and was collected without falling off due to the adhesive force of the adhesive.

  In the collection nets of Examples 1, 2, 3, and 4 and the collection nets of Comparative Examples 1, 2, and 3, in Examples 1, 2, 3, and 4, more dust is attracted to the collection net. It was.

  On the other hand, when the film (Comparative Example 4) with the adhesive applied on the front and back is suspended in the room, the air is reversed in the vicinity of the film and flows backward in the direction away from the film. Only a part of the dust was close to the film and adhered.

  Moreover, in the air permeable filter formed from the nonwoven fabric, the air forcedly sent by the filter passed, and a part of dust in the air was collected by the filter. However, low-speed air like natural wind did not pass and dust in the air was not collected.

<Experimental example 2>
The dust collection rate of the collection net was measured. As the collection net, the collection nets of Examples 1, 1A, 2, 3, and 4 and Comparative Examples 1, 1A, 2, 3, and 4 described above were used.

  In the dust collection experiment, various collection nets were extended in an air conditioning experiment apparatus (wind tunnel experiment apparatus) set to a wind speed of 0.3 to 1.0 m / sec. A vinyl chloride resin powder having a size of 30 to 50 μm was suspended as dust in the room. Video recording of dust flow between the front and back of the collection net, observation of dust movement, number of dust per unit area (N1) suspended in the air, and collection net per unit area The number of dust adhering to (N2) was measured. The ratio (N2 / N1) of the number of dusts (N2) adhering to the collection net per unit area to the number of dusts per unit area (N1) suspended in air was determined as the dust collection rate. The experiment was performed five times, and the dust collection rate was determined as an average of the five experimental values. The experimental results are shown in Table 1.

  As shown in Table 1, the collection nets of Examples 1, 1A, 2, 3, and 4 had a higher dust collection rate than the collection nets of Comparative Examples 1, 1A, 2, 3, and 4. . The collection net of Example 2 had a higher dust collection rate than the collection net of Example 1. The collection nets of Examples 3 and 4 had higher dust collection rates than Examples 1 and 2, respectively. Moreover, in Example 1 and Comparative Example 1, although the aperture ratio was the same, the dust collection rate of Example 1 was higher than that of Comparative Example 1. The reason is considered as follows.

  The collection net of Example 1 shown in FIG. 1 forms a square mesh 10 between a pair of opposing vertical mesh legs 11 and a pair of opposing horizontal mesh legs 12. The mesh 10 per unit is divided into a plurality of space portions 100 by two or more horizontal insertion threads 13 extending in parallel with the horizontal net legs 12. Since the two or more horizontal insertion threads 13 extend in parallel with the horizontal net legs 12 constituting the mesh 10, the space portion 100 defined by the horizontal insertion threads 13 has a relatively narrow, substantially rectangular opening area. It becomes. Therefore, most of the dust flowing through the space portion 100 is collected by the horizontal insertion thread 13, the horizontal mesh leg 12, or the vertical mesh leg 11 surrounding the space portion 100.

  Further, the two or more lateral insertion yarns 13 are arranged at substantially equal intervals between the horizontal mesh legs 12, 12, thereby dividing the mesh 10 into the space portions 100 at substantially equal intervals. For this reason, the opening area | region which dust can pass in any space part 100 becomes narrow. Therefore, even if it passes through any opening region of the space part 100, dust is easily collected, and dust is effectively collected.

  Further, the apparent insertion diameter of the horizontal insertion thread 13 that divides the mesh 10 into a plurality of parts is made smaller than that of the vertical mesh legs 11 and the horizontal mesh legs 12 to suppress air resistance as much as possible. For this reason, while maintaining the shape and strength of the collection net with the vertical mesh legs 11 and the horizontal mesh legs 12, the air resistance of the space portion 100 can be kept low, and the air flow rate can be sufficiently secured. Therefore, it is thought that the dust collection rate of Example 1 became high.

  In the collection net of Example 1A, the adhesion amount of the adhesive is larger than that in Example 1, and the aperture ratio is small. For this reason, it is thought that dust easily adheres to the pressure-sensitive adhesive formed with more films, and the dust collection rate is increased.

  Further, in the collection net of Example 2 shown in FIG. 2, the slant insertion thread 14 that is narrower than the vertical mesh legs 11 and the horizontal mesh legs 12 is arranged in the space portion 100 and divided into a plurality of narrow spaces 101. Yes. For this reason, it is considered that the dust collection rate is further increased by further reducing the opening area through which dust passes while keeping the air resistance low and sufficiently ensuring the air flow rate.

  The collection net of Example 3 shown in FIG. 3 increases the length of the horizontal mesh legs 12 of the mesh 10 to reduce the number of the vertical mesh legs 11, while the interval between the horizontal mesh legs 12 and the horizontal insertion thread 13 is The same as in the first embodiment. For this reason, the distance between the upper and lower portions of the space portion 100 partitioned by the horizontal screen legs 13 is not different from that of the first embodiment, and the amount of the air flow is increased because the vertical screen legs 11 serving as air resistance are small. It is thought that the dust collection rate was higher than that.

  The collection net of Example 4 shown in FIG. 4 is the same as Example 2 except that the length of the horizontal net legs 12 constituting the mesh 10 is increased. For this reason, the distance between the upper and lower portions of the space portion 100 partitioned by the horizontal screen legs 13 is not different from that in the second embodiment, and since the vertical screen legs 11 serving as air resistance are small, the amount of air flow is increased, and the second embodiment. It is thought that the dust collection rate was higher than that.

  On the other hand, in the collection net of Comparative Example 1 shown in FIG. 5, the horizontal insertion yarn is not inserted into the mesh 10, and the mesh is not subdivided into a plurality of spaces. The mesh 10 larger than the space part allows most of the dust in the air to pass through and is not easily collected by the collection net.

  In the collection net of Comparative Example 2 shown in FIG. 6, the mesh 10 is partitioned into two space portions 100 by one oblique insertion thread 14. The space portion 100 has a substantially trapezoidal shape and is formed between a long side and a short side that are parallel to each other. In the space portion 100, an opening region having a relatively large distance between yarns exists on the long side thereof. In this large opening area, it is considered that dust is hardly collected and the dust collection rate is relatively low.

  In the collection net of Comparative Example 3 shown in FIG. 7, two oblique insertion threads 14 crossed in an X shape divide the mesh 10 into four. Two of the divided space portions 109 are small triangles and are easily closed by the adhesive 2, and the other two space portions 109 have a large height in the vertical direction of the central portion, and dust is filtered in these portions. It is easy for dust to pass through. In addition, the reversal of air is relatively large due to the influence of two diagonally inserted yarns having a large apparent diameter, which are likely to generate air resistance, and the opportunity for dust filtration is reduced as a whole. Therefore, it is considered that the dust collection function of Comparative Example 3 did not exhibit an effective dust filtering function even though the aperture ratio was small and the dust collection area was large as in Example 2.

  In the film of Comparative Example 4, since no opening is formed, air does not circulate. Moreover, it is considered that the air was reversed in the vicinity of the film, so that the dust did not easily reach the film surface, and the dust collection rate was extremely low.

1: net base material, 10: mesh, 11: vertical mesh leg, 12: horizontal mesh leg, 13: horizontal insertion thread, 14: oblique insertion thread, 100: space part, 101: narrow space part, 2: adhesive.

Claims (6)

A plurality of vertical mesh legs formed by connecting the loops in the vertical direction by passing through adjacent loops and extending in the vertical direction substantially parallel to each other, and a plurality of connections between the adjacent vertical network legs extending in the horizontal direction A net base material formed by forming a square mesh between the pair of opposite vertical net legs and the pair of opposite horizontal net legs,
A collection net comprising an adhesive applied to the net substrate,
The net base material further includes two or more transverse insertion yarns in the transverse direction, each having an apparent diameter smaller than the apparent diameter of each of the vertical mesh legs and the horizontal mesh legs in each mesh. The two or more transverse insertion yarns are extended and arranged between the vertical mesh legs at substantially equal intervals between the vertical mesh legs facing each other across the mesh. A collection net characterized in that it is divided into substantially rectangular spaces having a length in the horizontal direction relatively longer than the length in the vertical direction at substantially equal intervals.   The net base material extends obliquely with respect to the lateral direction in each space portion with an oblique insertion thread having an apparent diameter smaller than the apparent diameter of either the vertical mesh legs or the horizontal mesh legs. The collection net according to claim 1, wherein the space portion is divided into a plurality of narrow space portions by the oblique insertion thread.   The collection net according to claim 1 or 2, wherein a length of the horizontal net legs forming the mesh is larger than a length of the vertical net legs forming the mesh.   The collection net according to any one of claims 1 to 3, wherein the lateral insertion yarn is made of a monofilament of 350 to 1000 denier.   The collection net according to claim 2, wherein the oblique insertion yarn is made of a monofilament of 350 to 1000 denier.   The collection net according to any one of claims 1 to 5, wherein an aperture ratio of the collection net is 10 to 80%.

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