Seal material having cut pile

Abstract

To provide a seal material having cut pile, which ensures sealability in a low load state and has high degree of freedom for design.SOLUTION: A seal material has cut pile. The seal material has at least two types of cut piles formed by shirring of a woven fabric or a knitted fabric including at least two types of pile yarns. At least the two types of cut piles are different in easily falling property. At least the two types of cut piles constitute stripe by forming lines respectively on a surface of the seal material. The cut pile forming the lines has hair flow direction tilting toward one of the adjacent cut piles forming lines.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a sealing material having cut pile. [Background technology]

[0002] It is known that a sealant having cut pile is used to seal the gap between a sliding body and a support that supports the sliding body. Patent Document 1 discloses a sealant having striped cut pile woven fabric for preventing powder leakage from a device that uses powder such as toner. Patent Document 2 discloses a sealant having cut pile knitted fabric used to prevent toner leakage from an electrophotographic image processing device. Patent Document 3 discloses a sealant having cut pile woven fabric or cut pile knitted fabric that prevents the intrusion of liquids such as coolant as well as solids such as chips and foreign matter into the sliding part of a slider. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-127832 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-251391 [Patent Document 3] Japanese Patent Application Publication No. 2023-84031 Summary of the Invention [Problem to be solved by the invention]

[0004] The sealing material disclosed in Patent Document 1 has a surface with steps due to the stripes of the cut pile fabric. These steps contribute to reducing frictional heat caused by the contact pressure of the cut pile. However, the present inventors have found that the sealing material disclosed in Patent Document 1 may not be able to ensure sufficient sealing performance when the load applied to the cut pile in the gap between the sliding body and the support is low (hereinafter, sometimes referred to as a "low load state").

[0005] Patent Documents 2 and 3 disclose sealing materials with one type of cut pile. The properties of sealing materials with cut pile, such as sealing ability, water repellency, and durability, vary depending on the type, thickness, and density of the fibers that make up the cut pile. When designing sealing materials with cut pile, the pile yarn is selected taking these properties into consideration.

[0006] In addition to pile yarns made of one type of monofilament, pile yarns made of two or more types of monofilaments are known as pile yarns used in sealing materials with cut pile. When using pile yarns made of two or more types of monofilaments, it is possible to design sealing materials with cut pile that take into account the above-mentioned characteristics by combining the monofilaments that make up the pile yarn. However, it can be difficult to manufacture pile yarns made of two or more types of monofilaments by combining monofilaments that have large differences in properties such as tensile strength, flexibility, fineness, fiber length, entanglement, draftability, bundling ability, elasticity, wettability, moisture retention, and openability.

[0007] Furthermore, pile yarns made of composite fibers containing two or more polymers with different properties are known as pile yarns used in sealing materials with cut pile. When using pile yarns made of composite fibers, it is possible to design sealing materials with cut pile that take into account the above-mentioned properties by selecting the combination of polymers that make up the composite fibers. However, the types of polymers that can be used as materials for composite fibers are limited.

[0008] As described above, pile yarns made of two or more types of monofilaments and pile yarns made of composite fibers are limited in the combination of monofilaments and the types of polymers that can be used, which has resulted in a problem of limited freedom in designing sealing materials with cut pile (hereinafter sometimes referred to as "design freedom").

[0009] Therefore, an object of the present invention is to provide a sealing material having cut pile that ensures sealing properties even under low load conditions and has a high degree of design freedom. [Means for solving the problem]

[0010] The present invention relates to a sealing material having at least two types of cut pile formed by shearing a woven or knitted fabric containing at least two types of pile yarn, the at least two types of cut pile having different collapse liabilities, the at least two types of cut pile constituting stripes that form lines on the surface of the sealing material, and the cut pile forming the lines has a pile flow direction that is inclined toward the adjacent cut pile forming the line on one side. [Effects of the Invention]

[0011] According to the present invention, a sealing material having cut pile is provided which ensures sealing performance even under low load and has a high degree of design freedom. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic diagram showing a sealing material having cut pile according to one embodiment of the present invention, and a sealing material that is the base material for the sealing material. [Figure 2] FIG. 2 is an enlarged schematic view of a side surface of the sealing material. [Figure 3] FIG. 10 is an explanatory diagram of the reference angle of the cut pile in the seal material for measurement after oven treatment. [Figure 4] FIG. 10 is an explanatory diagram of the slant angle of the cut pile on the surface of the sealing material after slant treatment. [Figure 5] FIG. 10 is an explanatory diagram of the inclination angle of the pile flow direction of the cut pile. [Figure 6] 10 is an explanatory diagram of steps occurring between the first cut pile and second cut pile lines in the stripes formed on the surface of the sealing material. FIG. [Figure 7] FIG. 1 is a schematic diagram of a pile knitted fabric before shirring. [Figure 8] FIG. 1 is a schematic diagram of a cut pile knitted fabric after shirring. [Figure 9]10 is a schematic diagram showing a sealing material having three types of cut pile and the sealing material from which it is made according to another embodiment of the present invention. FIG. [Figure 10] 10 is a schematic diagram showing a sealing material having cut pile that forms lines including multiple arrangement directions, and the sealing material that is the raw material for the sealing material, according to another embodiment of the present invention. [Figure 11] FIG. 1 is a schematic diagram of a vibration testing device. [Figure 12] 10 is a graph showing differences in slant angles. [Figure 13] 10 is a graph showing the measurement results of the step. DETAILED DESCRIPTION OF THE INVENTION

[0013] The present invention will be described in detail below based on preferred embodiments, with appropriate reference to the accompanying drawings. However, the present invention is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0014] (1) One embodiment of the present invention is a sealing material having cut pile, The sealing material has at least two types of cut pile formed by shirring a woven or knitted fabric containing at least two types of pile yarn, The above two types of cut pile have different collapse easiness. The at least two types of cut piles constitute stripes that form lines on the surface of the sealing material, the cut pile forming the line has a pile flow direction inclined toward the cut pile forming the adjacent line on one side; It is a sealing material.

[0015] The sealing material (1) above ensures sealing performance even under low load conditions and has a high degree of design freedom.

[0016] (2) In the sealing material described in (1) above, the sealing material has the at least two types of cut pile formed by shearing a knitted fabric in which the at least two types of pile yarn are weft-knitted to form stripes.

[0017] The sealing material described in (2) above ensures sealing performance under low load conditions, has a high degree of freedom in design, and also improves productivity.

[0018] (3) In the sealing material described in (1) or (2) above, the difference in the tendency to collapse means that there is a difference in the reference angle between the at least two types of cut pile. The above reference angle is For each of the at least two types of pile yarns, a seal material for measurement is produced having cut pile formed by shirring a woven fabric containing only one type of pile yarn selected from the at least two types of pile yarns; 10g / cm for the cut pile of the seal material used for the measurement 2 With the load applied, the sample was heated in an oven at 160°C for 5 minutes, then left in the oven for 1 day to return to room temperature and remove the weight. It is obtained based on the measurement results of the slant angle of the cut pile of the sealing material for measurement that has been subjected to the oven treatment.

[0019] (4) In the sealing material described in (3) above, the difference in reference angle between the at least two types of cut pile is 30° or less.

[0020] (5) In the sealing material according to any one of (1) to (4), the at least two types of pile yarns are A combination of a PTFE yarn having a thickness of 440 decitex and a cross-sectional fiber count of 60 with a Berima yarn having a thickness of 84 decitex and a cross-sectional fiber count of 28, or The combination is a yarn made of acrylic fiber, 393.7 decitex in thickness, and 236 fibers in cross-section, and a yarn made of rayon fiber, 500 decitex in thickness, and 132 fibers in cross-section.

[0021] (6) In the sealing material according to any one of (1) to (5), the hair flow direction is determined by using a steam iron with steam, at a temperature of 190°C, a moving speed of 2cm / sec, and a pressure of 2kg / cm. 2 The fabric is formed by ironing under the following conditions and then slanting the pile.

[0022] (7) In the sealing material described in (6) above, the average slant angle of the at least two types of cut pile formed by the slant treatment relative to the surface of the sealing material is 30° or more and 70° or less.

[0023] (8) In the sealing material according to any one of (1) to (7), the bristles flow direction is: When the direction of a perpendicular line perpendicular to the arrangement direction of the cut piles forming the line and pointing in the arrangement direction of the cut piles forming the adjacent line on one side is set to 0°, It is tilted within a range of ±70° from the perpendicular direction.

[0024] (9) In the sealing material according to any one of (1) to (8) above, the step occurring between the stripe lines on the surface of the sealing material is 0.4 mm or less.

[0025] The sealing materials described in (3) to (9) above have improved sealing properties under low load conditions.

[0026] (10) The sealing material according to any one of (1) to (9) above is a sealing material that is used to prevent the inflow and outflow of solids.

[0027] (11) The sealing material described in (10) above is a sealing material that is used to prevent toner leakage from an image forming device in an electrophotographic apparatus.

[0028] The sealing materials described in (1) to (9) above are suitable for preventing the inflow and outflow of solids, particularly for preventing toner leakage.

[0029] (12) The sealing material according to any one of (1) to (9) above is a sealing material that is used to prevent the inflow and outflow of liquid.

[0030] (13) In the sealing material described in (12) above, at least one of the at least two types of cut pile is subjected to a water-repellent treatment.

[0031] The sealing materials described in (1) to (9) above are suitable for preventing the inflow and outflow of liquids, particularly liquids containing water.

[0032] [Basic composition of sealing material] FIG. 1 is a schematic diagram showing a sealing material 1 having cut pile 110 according to one embodiment of the present invention, and a sealing material 2 that is the raw material for the sealing material 1. FIG. 1(a) shows a schematic plan view of the sealing material 2. FIG. 1(b) shows a schematic front view of the sealing material 2. FIG. 1(c) shows a schematic side view of the sealing material 2. FIG. 1(d) shows a schematic plan view of the sealing material 1. FIG. 2 is an enlarged schematic view of the side of the sealing material 2.

[0033] The sealing material 1 and the sealing material 2 each include a cut pile fabric 10 and a support portion 20. The cut pile fabric 10 includes a cut pile 110 and a fabric portion 120. The cut pile 110 is formed by shearing a woven pile fabric or a knitted pile fabric (hereinafter sometimes referred to as a "woven or knitted pile fabric"). In other words, the fabric portion 120 applied to the sealing material 2 may be either a woven fabric or a knitted fabric. The formation of cut pile by shearing a woven or knitted pile fabric may be performed using any known method, and is not particularly limited.

[0034] The fabric part 120 of the cut pile fabric 10 is adhered to the support part 20 so that the cut pile 110 is disposed on the surface of the sealing material 2. As shown in FIG. 2, the fabric part 120 has a ground yarn layer 121 and a coating layer 122.

[0035] The ground yarn layer 121 is made of a base fabric made of ground yarn. The ground yarn may be any known yarn used in pile woven or knitted fabrics, and is not particularly limited. Examples of the ground yarn include yarns made of natural fibers, artificial fibers, or combinations thereof. Specific natural fibers include cotton, silk, and wool. Specific artificial fibers include polyester, polytetrafluoroethylene (hereinafter sometimes referred to as "PTFE"), and rayon.

[0036] The coating layer 122 is configured to prevent the cut pile 110 from coming off from the ground yarn layer 121. The coating layer 122 is formed from a coating agent. There are no particular restrictions on the coating agent, as long as it is a known coating agent that is used to prevent cut pile from coming off. As the coating agent, a water-soluble emulsion is preferred, and an acrylic emulsion is particularly preferred.

[0037] The support part 20 has an adhesive layer 210, a support layer 220, and an attachment layer 230. The adhesive layer 210 is configured to adhere the fabric part 120 to the support layer 220 of the support part 20. The cut pile fabric 10, the back surface of which is coated with the coating layer 122, is supported on the support layer 220 by the adhesive layer 210.

[0038] The adhesive layer 210 is formed of an adhesive or double-sided tape. The adhesive and double-sided tape may be any known adhesive or double-sided tape used to bond a cut pile fabric to a supporting part in the manufacture of a sealant having cut pile, and are not particularly limited. Specific examples of the adhesive include hot melt adhesives.

[0039] There are no particular limitations on the material of the support layer 220, and it is sufficient to use a known material that is applied to a seal material having cut pile. Specific examples of the material of the support layer 220 include a shape-retaining sheet and a stainless steel strip for a spring.

[0040] As shown in Fig. 2, the sealing material 2 has a front surface on which the cut pile 110 is arranged and a back surface on which an attachment layer 230 is arranged. That is, the schematic plan view of the sealing material 2 in Fig. 1(a) and the schematic plan view of the sealing material 1 in Fig. 1(d) are also schematic views showing the surfaces of the sealing material 2 and the sealing material 1, respectively. The attachment layer 230 is configured to attach the sealing material 1 to a member to which the sealing material 1 is applied. The attachment layer 230 is formed, for example, from double-sided tape or adhesive.

[0041] COA in FIG. 1 indicates the cut-out area when the sealing material 1 is cut out from the sealing material 2. The sealing material 1 can be cut out from the sealing material 2 by any known method, and is not particularly limited. One method for cutting out the sealing material 1 from the sealing material 2 is, for example, press-cutting using a die. The sealing material 1 is cut out from the sealing material 2 by press-cutting using a rectangular die. The die is not limited to a rectangular shape and can be designed appropriately depending on the member to which the sealing material is to be attached.

[0042] The cut pile 110 includes a first cut pile 111 and a second cut pile 112. In this embodiment, the first cut pile 111 is less likely to collapse than the second cut pile 112. As shown in FIG. 1, the first cut pile 111 and the second cut pile 112 each form stripes on the surface of the sealing material 1. In designing the sealing material 1, the pile yarns that form the base of the first cut pile 111 and the second cut pile 112 can be selected depending on the properties required of the sealing material 1. Therefore, the sealing material 1 has a higher degree of design freedom than sealing materials that have only one type of cut pile.

[0043] 1 indicates the pile flow direction of the cut pile 110 on the surface of the sealing material 1 and the sealing raw material 2. The first cut pile 111 and the second cut pile 112 have a pile flow direction FD that is inclined toward the cut pile forming the adjacent line on one side. The pile flow direction FD of the sealing material 1 and the sealing raw material 2 is formed so as to be approximately perpendicular to the arrangement direction AD1 of the first cut pile 111 and the arrangement direction AD2 of the second cut pile 112. The pile flow direction FD is formed, for example, by slanting the sealing raw material 2 using a heat roller or iron.

[0044] As shown in Figure 2, the first cut pile 111 and the second cut pile 112 are slanted in the pile flow direction FD so that each one leans toward the adjacent cut pile on one side. This allows the first cut pile 111, which is less likely to lean, to support the second cut pile 112, which is more likely to lean. Therefore, the support provided by the first cut pile 111 prevents the second cut pile 112 from leaning over, as described below, and reduces the slanting angle of the second cut pile 112. As a result, the steps DL between the stripe lines, as described below, on the surfaces of the sealing material 1 and the sealing material 2 are reduced, ensuring the sealing performance of the sealing material 1 even under low load conditions.

[0045] The material of the cut pile 110 is not particularly limited, as long as it is a known material used for pile yarn fibers. Examples of materials for the cut pile 110 include PTFE, perfluoroalkoxyalkane (hereinafter sometimes referred to as "PFA"), acrylic, polyester, nylon, rayon, Berima (registered trademark), carbon fiber, and polyacrylonitrile (PAN) flame-resistant fiber. Note that Berima (registered trademark) is a composite fiber containing nylon and polyester, and hereinafter may be simply referred to as "Berima." In the sealing material 1 of this embodiment, PTFE is used as the material for the first cut pile 111, and Berima is used as the material for the second cut pile 112.

[0046] [Easiness of cut pile to collapse] The first cut pile 111 and the second cut pile 112 differ in how easily they collapse when slanted. The collapse of the cut pile was measured by placing a weight on a seal material for measurement, which has cut pile formed by shearing a fabric containing only one type of pile yarn, and measuring the collapse of the cut pile with a weight of 10 g / cm. 2 The seal material to be measured is heated in an oven at 160°C for 5 minutes under a load of 160°C, then left in the oven for 1 day to return to room temperature, and the weight is removed (hereinafter referred to as "oven-treated").The value can be obtained based on the slant angle of the cut pile (hereinafter referred to as "reference angle").

[0047] For example, the collapse susceptibility of the first cut pile 111 and the second cut pile 112 after slanting is determined based on the reference angle (hereinafter sometimes referred to as the "first reference angle") of the first cut pile 111 in a sealing material in which only the first cut pile 111 is arranged on the surface after oven treatment (hereinafter sometimes referred to as the "first measurement sealing material"), and the reference angle (hereinafter sometimes referred to as the "second reference angle") of the second cut pile 112 in a sealing material in which only the second cut pile 112 is arranged on the surface after oven treatment (hereinafter sometimes referred to as the "second measurement sealing material"). As described above, the sealing material 1 is configured such that the first cut pile 111, which is less likely to collapse, supports the second cut pile 112, which is more likely to collapse. Therefore, the first reference angle of the first cut pile 111, which is less likely to collapse, is smaller than the second reference angle of the second cut pile 112, which is more likely to collapse.

[0048] In the present invention, "cut piles having different collapse easiness" refers to the difference in the reference angle between at least two types of cut pile in a sealing material having the target cut pile. For example, if a sealing material having cut piles has a first cut pile 111 and a predetermined cut pile having a smaller reference angle than the first cut pile 111, the sealing material having the cut pile will be configured such that the predetermined cut pile, which is less likely to collapse, supports the first cut pile 111, which is more likely to collapse. Therefore, in the sealing material having the cut pile, the first cut pile 111 will be the cut pile that is more likely to collapse. In other words, the collapse easiness of the cut pile is determined relatively based on the reference angle between at least two types of cut pile in the sealing material having the target cut pile.

[0049] Fig. 3 is an explanatory diagram of the reference angle α of the cut pile in the measurement seal material 3 after oven treatment. Fig. 3 shows a schematic cross-sectional view of the measurement seal material 3 cut along the pile flow direction. In actual measurement of the reference angle α, a cross-sectional image taken by a digital microscope of the measurement seal material 3 cut along the pile flow direction is used.

[0050] As shown in FIG. 3, the test seal material 3 includes a cut pile fabric 11 and a support portion 21. The cut pile fabric 11 has one type of cut pile 110a, a ground yarn layer 121a, and a coating layer 122a. The support portion 21 has an adhesive layer 210a, a support layer 220a, and an attachment layer 230a. The cut pile 110a of the first test seal material becomes the first cut pile 111. The cut pile 110a of the second test seal material becomes the second cut pile 112. When comparing the reference angles of the first cut pile 111 and the second cut pile 112 in the seal material 1 after oven treatment, it is preferable that the first test seal material and the second test seal material as the test seal material 3 have the same configuration as the seal material 2 except for the cut pile 110a.

[0051] In Figure 3, SL1 indicates a reference line on the surface of the measurement seal material 3. UL1 indicates a reference line on the underside of the cut pile fabric 11. The reference line UL1 is set at the boundary between the cut pile fabric 11 and the support part 21 in the digital microscope cross-sectional image of the measurement seal material 3. The width SW1 between the reference line SL1 and the reference line UL1 indicates the thickness of the cut pile fabric 11 of the measurement seal material 3. ML1 indicates the midline between the reference line SL1 and the reference line UL1. The midline ML1 is set at a position midway through the thickness of the cut pile fabric 11 of the measurement seal material 3. ML2 indicates a quarter line between the reference line SL1 and the midline ML1. The quarter line ML2 is set at a position one-quarter of the thickness of the cut pile fabric 11 of the measurement seal material 3.

[0052] The width SW1 can be calculated by subtracting the thickness of the support portion 21 of the seal material 3 for measurement from the thickness of the seal material 3 for measurement. The thickness of the seal material 3 for measurement can be measured using a thickness measuring device conforming to JIS K 6400:2012. The thickness of the support portion 21 can be measured based on a cross-sectional image taken by a digital microscope using the image dimension measurement function of the software provided with the digital microscope. The reference line SL1 is set in the cross-sectional image of the seal material 3 for measurement taken by the digital microscope based on the reference line UL1 and the width SW1.

[0053] The reference angle α can be measured by the following steps (1-1) to (1-5). (1-1) In the cross-sectional image of the measurement sealing material 3 cut along the hair flow direction and after oven treatment, select multiple fibers whose hair ends FT are located between the quarter line ML2 and the reference line SL1. (1-2) For each selected fiber, the crossing position CP where the fiber crosses the midline ML1 is identified. (1-3) For each selected fiber, the line connecting the tip FT and the intersection position CP is defined as the slant direction OD of each fiber. (1-4) The slant angle of the slant direction OD of each fiber relative to the reference line UL1 is measured. (1-5) The average value of the slant angles of the above fibers is calculated as the reference angle α.

[0054] In measuring the reference angle α of the seal material 3 for measurement shown in Fig. 3, the reference angle α is calculated based on the pile ends FT1-4, the crossing positions CP1-4, the slant directions OD1-4, and the slant angles α1-4. In the above-mentioned procedure (1-1), it is preferable to select at least three fibers. This allows the reference angle α calculated in the above-mentioned (1-5) to be a value that more closely reflects the average slant angle of the entire cut pile of the seal material 3 for measurement after oven treatment.

[0055] In the present invention, the difference in the reference angles between at least two types of cut pile is preferably 30° or less, and particularly preferably 20° or less. This allows the first cut pile 111 to adequately support the second cut pile 112. Therefore, the support provided by the first cut pile 111 further prevents the second cut pile 112 from collapsing, as described below, and thereby reduces the step DL between the stripe lines on the surfaces of the sealing material 1 and the sealing blank 2, as described below, improving the sealing performance of the sealing material 1 under low load conditions. Furthermore, since there is a certain degree of freedom in the difference in the reference angles, sufficient design flexibility is ensured.

[0056] [Slant angle of cut pile after slanting] Fig. 4 is an explanatory diagram of the slant angle δ of the cut pile on the surface of the sealing material 1 after slant processing. Fig. 4 shows a schematic cross-sectional view of the sealing material 1 after slant processing when cut along the pile flow direction. The actual slant angle δ is measured using a digital microscope cross-sectional image of the sealing material 1 after slant processing cut along the pile flow direction.

[0057] The slant treatment may be performed by any known method using a heat roller, an iron, etc. For example, a method of performing the slant treatment with a heat roller is to use a Monkey29DX (manufactured by Lamy Corporation) as the heat roller, at a temperature of 140°C, a speed of 0.3 m / min, and a pressure of 1 kg / cm. 2 For example, a method of slanting the hair using an iron uses a steam iron, with steam present, a temperature of 190°C, a moving speed of 2cm / sec, and a pressure of 2kg / cm. 2 The following conditions are met for the slanting process:

[0058] In Figure 4, SL2 indicates the reference line on the surface of the sealing material 1 after slanting. UL2 indicates the reference line on the underside of the cut pile fabric 10. The reference line UL2 is set at the boundary between the cut pile fabric 10 and the support part 20 in the digital microscope cross-sectional image of the sealing material 1 described above. The width SW2 between the reference line SL2 and the reference line UL2 indicates the thickness of the cut pile fabric 10. ML3 indicates the midline between the reference line SL2 and the reference line UL2. The midline ML2 is set at a position midway through the thickness of the cut pile fabric 10. ML4 indicates the quarter line between the reference line SL2 and the midline ML3. The quarter line ML4 is set at a position one-quarter of the thickness of the cut pile fabric 10.

[0059] The width SW2 can be calculated by subtracting the thickness of the support portion 20 from the thickness of the sealing material 1 after the slanting process. The thickness of the sealing material 1 after the slanting process can be measured using a thickness measuring device that complies with JIS K 6400:2012. The thickness of the support portion 20 can be measured based on a cross-sectional image taken with a digital microscope using the image dimension measurement function of the software provided with the digital microscope. The reference line SL2 is set on the cross-sectional image of the sealing material 1 after the slanting process taken with a digital microscope based on the reference line UL2 and the width SW2.

[0060] The slant angle δ formed by the slant treatment can be measured by the following procedures (2-1) to (2-5). (2-1) In a cross-sectional image of the sealing material 1 after the slant treatment, cut along the pile flow direction, select multiple fibers for each of the first cut pile 111 and the second cut pile 112, whose fiber tips FT are located between the quarter line ML4 and the reference line SL2. (2-2) For each selected fiber, the crossing position CP where the fiber crosses the midline ML3 is identified. (2-3) For each selected fiber, the line connecting the tip FT and the crossing position CP is defined as the slant direction OD of each fiber. (2-4) The slant angle of the slant direction OD of each fiber relative to the reference line UL1 is measured. (2-5) The average value of the slant angles of the above-mentioned fibers is calculated as the slant angle δ.

[0061] In the measurement of the slant angle δ of the sealing material 1 shown in Figure 4, the slant angle δ is calculated based on the pile tips FT5 and FT7, crossing positions CP5 and CP7, slant directions OD5 and OD7, and slant angles δ1 and δ3 of the first cut pile 111, and the pile tips FT6 and FT8, crossing positions CP6 and CP8, slant directions OD6 and OD8, ​​and slant angles δ2 and δ4 of the second cut pile 112. In the above procedure (2-1), it is preferable to select at least two fibers from each of the first cut pile 111 and the second cut pile 112. This allows the slant angle δ calculated in the above procedure (2-5) to be a value that more closely reflects the average slant angle of the entire cut pile 110 on the surface of the sealing material 1 after the slant treatment.

[0062] The slant angle δ is preferably between 30° and 70°. If the slant angle δ is 30° or more, the width SW2, which is the thickness of the cut pile fabric 10, is ensured, allowing for flexible adjustment to the tolerance of the gap where the sealing material 1 is applied. If the slant angle δ is 70° or less, a sufficient pile flow direction FD is formed in the cut pile fabric 110, improving the sealing performance of the sealing material 1.

[0063] The cut pile sealing material of the present invention uses at least two types of cut pile with different collapse liabilities, allowing the less collapsed cut pile to support the more collapsed cut pile adjacent to each other. This prevents the slanting angle of the more collapsed cut pile from decreasing when the slanting process is performed during the manufacturing of the sealing material. This reduces the step between each stripe line (described below). As a result, the seal with cut pile is able to maintain its sealing performance even under low loads.

[0064] [Inclination angle of hair flow direction] FIG. 5 is an explanatory diagram of the inclination angle θ of the pile flow direction FD of the cut pile 110. The pile flow direction FD of the cut pile 110 is formed by the slant process in the manufacturing of the sealing material 2 described above. In FIG. 5, PD indicates a perpendicular direction toward the pile flow direction FD, which is perpendicular to the arrangement direction AD1 of the first cut pile 111 and the arrangement direction AD2 of the second cut pile 112. θ indicates the inclination angle of the pile flow direction FD when the perpendicular direction PD is set to 0°. In FIG. 5, the positive and negative inclination angles of the inclination angle θ are indicated by arrows extending from the perpendicular direction PD. TBE indicates the tips of the fibers located at both ends of the cut pile 110 in a plan view of the sealing material 1. MP indicates the midpoint of the line connecting the two tips TBE. CPR indicates the root of the cut pile 110 in the ground yarn layer 121.

[0065] As described above, the sealing material 1 according to this embodiment is configured such that the pile flow direction FD is the same as the normal direction PD, i.e., the inclination angle θ is 0°. To facilitate understanding of the inclination angle θ, Fig. 5 shows the configuration of the cut pile 110 in which the pile flow direction FD has an inclination angle θ of +20° with respect to the normal direction PD.

[0066] The inclination angle θ of the sealing material 1 is preferably within the range of ±70°, particularly ±35°. If the inclination angle θ of the pile flow direction FD is within the range of ±70°, the first cut pile 111 can adequately support the collapse of the second cut pile 112. This reduces the step between each line in the stripes, improving the sealing performance of the sealing material 1 under low load conditions. If the inclination angle θ of the pile flow direction FD is within the range of ±35°, it is possible to provide a sealing material 1 with excellent sealing performance under low load conditions.

[0067] 5 shows a configuration in which all cut pile 110 have an inclination that coincides with the pile flow direction FD to facilitate understanding of the inclination angle θ. The actual inclination angle θ of the pile flow direction FD is measured using a planar image of the sealing material 1 taken with a digital microscope.

[0068] The cut pile 110 is formed when the pile woven / knitted fabric is sheared, causing the fibers that make up the pile yarn to untwist and separate. Therefore, in the planar image taken with the digital microscope described above, as shown in the schematic planar view of the sealing material 1 in Figure 5, not all of the individual cut pile 110 have an inclination angle θ that perfectly matches the pile flow direction FD. In other words, the pile flow direction FD indicates the average inclination direction of the entire cut pile 110 on the surface of the sealing material 1. Similarly, the inclination angle θ of the pile flow direction FD indicates the average inclination angle of the entire cut pile 110.

[0069] The inclination angle θ of the pile flow direction FD can be calculated from the average value of the inclination angles of multiple cut piles 110 or the average value of the inclination angles of multiple fibers of the cut pile 110. When calculating the inclination angle θ from the average value of the inclination angles of multiple cut piles 110, the inclination angle θ can be calculated by the following steps (3-1) to (3-5). (3-1) In the planar image of the sealing material 1, a plurality of cut piles 110 are selected as targets for measuring the inclination angle. (3-2) For each selected cut pile, identify the tip TBE and root CPR. (3-3) The line passing through the midpoint MP of the line connecting the base CPR of the target cut pile 110 to the tip TBE is defined as the pile flow direction of the target cut pile 110. (3-4) The inclination angle of the pile flow direction of the target cut pile 110 with respect to the perpendicular direction PD is measured. (3-5) The average value of the inclination angles measured for each of the target cut piles 110 is calculated as the inclination angle θ.

[0070] In the above-mentioned procedure (3-1), it is preferable to select at least two cut piles 110 from each of the first cut piles 111 and the second cut piles 112, for a total of four or more cut piles 110. This allows the inclination angle θ calculated in the above-mentioned (3-5) to be a value that more closely reflects the average inclination angle of the entire cut pile 110.

[0071] When the inclination angle θ is calculated from the average value of the inclination angles of the fibers of the cut pile 110, the inclination angle θ can be calculated by the following steps (4-1) to (4-6). (4-1) The straight lines of the cut pile fibers are detected by linear Gabor transformation of the planar image of the sealing material 1. (4-2) Line detection by linear Gabor transform. Thinning is performed by morphology transform of the image. (4-3) A binary image is obtained by binarizing the thinned image using morphology transformation. (4-4) In the acquired binary image, areas not to be analyzed are masked to obtain a masked image. (4-5) Based on the masked image, line segments corresponding to the length of the cut pile fibers are detected. (4-6) The average value of the inclination angles of the detected line segments with respect to the perpendicular direction PD is calculated as the inclination angle θ.

[0072] In the above-mentioned step (4-5), it is preferable to select at least 100 fibers from the cut pile 110. This allows the inclination angle θ calculated in the above-mentioned step (4-6) to be a value that more closely reflects the average inclination angle of the entire cut pile 110.

[0073] [Steps between stripe lines] FIG. 6 is an explanatory diagram of the step DL that occurs between each line of the first cut pile 111 and the second cut pile 112 in the stripes formed on the surface of the sealing material 1. As will be described later, the step DL increases as the inclination angle θ of the pile flow direction FD approaches ±90°. To facilitate understanding of the explanation of the step DL, FIG. 6 shows a schematic cross-sectional view of a sealing material 1 with an inclination angle θ of +90° in the pile flow direction FD, cut along the perpendicular direction PD. The actual measurement of the step DL is performed using a cross-sectional image of the sealing material 1 cut along the pile flow direction, taken with a digital microscope.

[0074] In Fig. 6, DLL indicates the reference line on the surface of the second cut pile 112, which is prone to collapse. The reference line DLL is set to be parallel to the reference line SL2. The setting of the reference line SL2 and the measurement of the width SW2 can be performed in the same manner as the measurement of the slant angle δ of the sealing material 1 with respect to the surface described above.

[0075] The step DL can be measured by the following steps (5-1) to (5-4). (5-1) In a cross-sectional image of the sealing material 1 cut along the pile flow direction, a plurality of second cut piles 112 to be used for setting the reference line DLL are selected. (5-2) For each of the selected second cut piles 112, one tip FT of the fibers present on the surface is selected. (5-3) An approximate line of each selected hair tip FT that is parallel to the reference line SL2 is set as the reference line DLL. (5-4) The width between the reference line SL2 and the reference line DLL is the step DL, and its length is measured.

[0076] 6, the step DL is measured by setting a reference line DLL from the pile tips FT9 to FT12 of the four second cut piles 112. In the above-mentioned procedure (5-1), it is preferable to select at least three or more second cut piles 112. This allows the step DL measured in the above-mentioned (5-4) to be a value that more closely reflects the average step on the entire surface of the sealing material 1.

[0077] The smaller the step DL, the better the sealing performance of the sealing material 1 under low load conditions. The step DL is 0.4 mm or less, preferably 0.2 mm or less, and particularly preferably 0.02 mm or less. If the step DL is 0.4 mm or less, the sealing performance of the sealing material 1 under low load conditions is improved. If the step DL is 0.2 mm or less, it is possible to provide a sealing material 1 with excellent sealing performance under low load conditions. If the step DL is 0.02 mm or less, it is possible to provide a sealing material 1 with even better sealing performance under low load conditions.

[0078] [Sealing material with striped cut pile knit fabric] FIG. 7 is a schematic diagram of a knitted fabric 4 (hereinafter, may be referred to as "pile knitted fabric 4") before shearing that is applied to the sealing material 2. FIG. 7(a) is a schematic side view of the pile knitted fabric 4 in the sealing material 2. FIG. 7(b) is a schematic plan view of the pile knitted fabric 4 in the sealing material 2. FIG. 8 is a schematic diagram of a knitted fabric 5 (hereinafter, may be referred to as "cut pile knitted fabric 40") after shearing of the pile knitted fabric 4 shown in FIG. 7. FIG. 8(a) is a schematic side view of the cut pile knitted fabric 40 in the sealing material 2. FIG. 8(b) is a schematic plan view of the cut pile knitted fabric 40 in the sealing material 2.

[0079] As shown in Fig. 7, the pile knit fabric 4 has a first pile yarn 111a, a second pile yarn 112a, and a ground yarn 121a. The pile knit fabric 4 is configured such that the first pile yarn 111a and the second pile yarn 112a are alternately weft-knitted on the knitted fabric of the ground yarn 121a. As shown in Fig. 7(b), the first pile yarn 111a and the second pile yarn 112a are knitted on the knitted fabric of the ground yarn 121a so that the loop pile LP protrudes.

[0080] In Figure 7(b), LD1 indicates the weft knitting direction of the first pile yarn 111a. LD2 indicates the weft knitting direction of the second pile yarn 112a. LFD indicates the loop flow direction of the pile loops LP on the knitted side of the ground yarn 121a. As shown in Figure 7(b), the loop flow direction LFD is formed approximately perpendicular to the weft knitting directions LD1 and LD2 by the weft knitting of the first pile yarn 111a and the second pile yarn 112a. Also, as shown in Figure 7(a), the pile loops LP of the first pile yarn 111a and the pile loops LP of the second pile yarn 112a both face the loop flow direction LFD and are inclined relative to the knitted side of the ground yarn 121a.

[0081] The loop pile LP of the pile fabric 4 is sheared to form first cut pile 111 and second cut pile 112. This turns the pile fabric 4 into a cut pile fabric 40. The first pile yarns 111a and second pile yarns 112a of the pile fabric 4 are alternately weft-knitted in the weft knitting direction LD1 and the weft knitting direction LD2, respectively. Therefore, by shearing the loop pile LP, stripes are formed on the surface of the cut pile fabric 40, with the first cut pile 111 and the second cut pile 112 forming lines.

[0082] As described above, the loop flow direction LFD of the pile fabric 4 is approximately perpendicular to the weft knitting direction LD1 and the weft knitting direction LD2. Therefore, the pile flow direction FD of the cut pile yarns 110 of the cut pile fabric 40, which are formed by shearing the loop pile yarns LP, is also approximately perpendicular to the arrangement directions AD1 and AD2. Furthermore, the loop pile yarns LP of the pile fabric 4 are inclined toward the loop flow direction LFD with respect to the knitted fabric of the ground yarn 121a. Therefore, the first cut pile yarns 111 and the second cut pile yarns 112 of the cut pile fabric 40 are inclined toward the pile flow direction FD, so that they each lean over the adjacent cut pile yarn on one side.

[0083] In the case of a sealing material 1 having cut pile woven fabric, after shearing, a slanting treatment using a heat roller or iron is required to give the cut pile 110 a slanted nap in the pile flow direction FD. On the other hand, in the case of a sealing material 1 having cut pile knitted fabric, the slanting treatment can be omitted or simplified to produce a sealing material 1 having cut pile 110 with slanted naps in the pile flow direction FD. Therefore, the sealing material 1 having cut pile knitted fabric ensures sealing performance even under low load, has a high degree of design freedom, and is highly productive.

[0084] [Application of sealing materials to prevent the inflow and outflow of solids] The sealing material 1 is suitable for environments (hereinafter sometimes referred to as "dry environments") that aim to prevent the inflow and outflow of solids such as toner and chips. Examples of applications of the sealing material 1 in dry environments include preventing toner leakage from an image forming device in an electrophotographic device and preventing dust from entering the housing of an industrial machine. The sealing material 1 is particularly suitable for preventing toner leakage from an image forming device in an electrophotographic device.

[0085] [Application of sealing materials to prevent fluid inflow and outflow] The sealing material 1 is suitable for environments (hereinafter sometimes referred to as "wet environments") where the purpose is to prevent the inflow and outflow of fluids such as coolant and cutting oil. Applications of the sealing material 1 in wet environments include, for example, preventing coolant from entering the sliding parts of machine tools and preventing the intrusion of foreign matter such as chips and wear powder.

[0086] When using the sealing material 1 to prevent the inflow and outflow of water or aqueous solutions, it is preferable that at least one of the first cut pile 111 and the second cut pile 112 be treated to be water-repellent. For example, when designing a sealing material with cut pile, water-repellent properties can be imparted to the sealing material by selecting pile yarn that has been treated to be water-repellent.

[0087] The entire cut pile of the sealing material may also be subjected to a water-repellent treatment. Examples of methods for water-repellent treatment include (A) immersing the cut pile in a water-repellent treatment liquid containing a water-repellent agent, removing it from the treatment liquid, and then drying it, (B) applying a water-repellent treatment liquid containing a water-repellent agent to the cut pile and then drying it, and (C) spraying a water-repellent treatment liquid containing a water-repellent agent onto the cut pile and then drying it.

[0088] Examples of the water repellent agent include fluorine-based water repellent agents, silicone-based water repellent agents, and paraffin-based water repellent agents.

[0089] [Other embodiments] The sealing material 1 has stripes formed by two types of cut pile 110, the first cut pile 111 and the second cut pile 112, but the present invention is not limited to this. For example, the sealing material of the present invention can also have stripes formed by three or more types of cut pile 110. More specifically, the sealing material of the present invention can have a stripe structure in which three types of cut pile 110, the first cut pile 111, the second cut pile 112, and the third cut pile 113, form lines, as shown in sealing material 5 and sealing material 6 in Figure 9. In Figure 9, AD3 indicates the arrangement direction of the third cut pile 113.

[0090] In the sealing material 1, the lines are formed by alternately repeating the arrangement direction AD1 of the first cut pile 111 and the arrangement direction AD2 of the second cut pile 112, but the present invention is not limited to this. The sealing material of the present invention can also be configured so that one line includes multiple arrangement directions. More specifically, as shown in the sealing material 7 and sealing material 8 in Figure 10, the sealing material of the present invention can also be configured as a stripe configuration in which lines are formed by alternately repeating two arrangement directions AD1 in which the first cut pile 111 are continuous and three arrangement directions AD2 in which the second cut pile 112 are continuous. [Example]

[0091] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to the following examples.

[0092] [Cut pile fabric production] Pile fabrics were woven on a Jacquard loom using the yarns shown in Table 1. The pile yarns of the woven pile fabrics were cut approximately in the center with a cutter attached to the loom. The cut pile fabrics after the pile yarn cutting were sheared with a shearing machine to produce cut pile fabrics 1 to 7 with a cut pile length of 1.4 mm.

[0093] [Table 1]

[0094] In this example, PTFE refers to PTFE yarn manufactured by Toray Industries, Inc., with a PTFE fiber material, a thickness of 440 decitex, and a cross-sectional fiber count of 60. Berima refers to Berima yarn manufactured by KB Seiren Co., Ltd., with a Berima fiber material, a thickness of 84 decitex before splitting, and a cross-sectional fiber count of 28. Acrylic refers to acrylic yarn manufactured by Toray Industries, Inc., with an acrylic fiber material, a thickness of 393.7 decitex, and a cross-sectional fiber count of 236. Rayon refers to rayon yarn manufactured by Aditya Birla Group Pt. Elegant Textile Industry, with a rayon fiber material, a thickness of 500 decitex, and a cross-sectional fiber count of 132. Warp polyester refers to polyester yarn manufactured by KB Seiren Co., Ltd., with a polyester fiber material, a thickness of 168 decitex, and a cross-sectional fiber count of 72. The polyester weft yarn refers to polyester yarn manufactured by Toray Industries, Inc., which is made of polyester fiber material, has a thickness of 33 decitex, and has 12 cross-sectional fibers.

[0095] The cut pile fabrics 1 to 4 only have a first cut pile formed by shearing the first pile yarn.

[0096] The cut pile fabrics 5 to 7 have first cut pile formed by shearing the first pile yarn and second cut pile formed by shearing the second pile yarn. The surface of the cut pile fabric is formed with stripes, each of which is made up of first lines of the first cut pile and second lines of the second cut pile.

[0097] [Preparation of seal material with cut pile fabric] An acrylic emulsion (CM4025, manufactured by Shin-Nakamura Chemical Co., Ltd.) was applied as a coating agent to the backside of each of the cut pile fabrics 1 to 7. After the coating agent had dried, a foam (ESH, manufactured by Inoac Corporation) serving as a support layer was attached to each of the cut pile fabrics 1 to 5 using double-sided tape to produce measurement sealing materials 1 to 4 and test sealing materials 1 to 3 shown in Table 2. Double-sided tape was used for the attachment layer.

[0098] [Table 2]

[0099] [Oven treatment of measurement seal material] A weight is placed on the measuring seal material 1 to 4, and the weight is 10 g / cm against the cut pile. 2 With the load applied, the seal materials 1 to 4 were heat-treated at 160°C for 5 minutes in a gear oven manufactured by Toyo Seiki Seisaku-sho, Ltd. After the heat treatment, the seal materials were left in the oven for one day to return to room temperature, and then the weights placed on the seal materials 1 to 4 were removed.

[0100] [Measurement of reference angle] Using a digital microscope (manufactured by KEYENCE Corporation), cross-sectional images (magnification 50x) of the measurement seal materials 1 to 4 cut along the pile flow direction after oven treatment were obtained. Using the obtained cross-sectional images of the measurement seal materials 1 to 4, the slant angles in the four slant directions OD were measured for each of the cut pile of the measurement seal materials 1 to 4 based on the procedures (1-1) to (1-5) above. The average value of the slant angles measured for each of the measurement seal materials 1 to 4 was calculated as the reference angle. Table 3 shows the reference angles of the measurement seal materials 1 to 4. The thickness of the measurement seal materials 1 to 4 was measured at 3.7 gf / cm using a constant pressure thickness meter PG-11J (manufactured by Teclock Corporation). 2 The thickness of the support portion was measured based on the cross-sectional images of the measurement seal materials 1 to 4 using the image dimension measurement function of the software attached to the digital microscope.

[0101] [Table 3]

[0102] From Table 3, it can be seen that the cut pile has the smallest reference angle in the following order: PTFE, berryma, acrylic, and rayon. In other words, it can be seen that the cut pile is most likely to collapse in the following order: PTFE, berryma, acrylic, and rayon. Furthermore, it can be seen that the difference in reference angle between the first cut pile (PTFE) and the second cut pile (berryma) in test sealing material 1 is 15.30°, the difference in reference angle between the first cut pile (acrylic) and the second cut pile (rayon) in test sealing material 2 is 14.84°, and the difference in reference angle between the first cut pile (PTFE) and the second cut pile (rayon) in test sealing material 3 is 34.18°.

[0103] [Slanting treatment of test seal material] The cut pile of each of the test sealing materials 1 to 3 was given a pile flow direction by slanting the pile using a steam iron (Steam Q Plus JSE-4874, manufactured by Japanet Takata Co., Ltd.) and a brush. The cut pile of each of the cut pile fabrics of the test sealing materials 1 to 3 was given a desired pile flow direction by using a steam iron and a brush in the direction of the pile flow, thereby producing sealing materials A to G. The cut pile was ironed with a steam iron using steam, at a temperature of 190°C, a moving speed of 2cm / sec, and a pressure of 2kg / cm. 2 The application was carried out in the direction of hair flow under the conditions of

[0104] In FIG. 5, sealing material A is a sealing material having a bristle flow direction FD that is the same as the perpendicular direction PD (0°). Sealing material B is a sealing material having a bristle flow direction FD with an inclination angle of 11.25°. Sealing material C is a sealing material having a bristle flow direction FD with an inclination angle of 22.5°. Sealing material D is a sealing material having a bristle flow direction FD with an inclination angle of 33.75°. Sealing material E is a sealing material having a bristle flow direction FD with an inclination angle of 45°. Sealing material F is a sealing material having a bristle flow direction FD with an inclination angle of 67.5°. Sealing material G is a sealing material having a bristle flow direction FD that is the same as the arrangement direction AD (90°).

[0105] [Preparation of sealing material with cut pile fabric] The produced seal materials A to G of the test seal materials 1 to 3 were subjected to press-punching using a punching die to produce seal materials A to G of the test seal materials 1 to 3, respectively. The punching die used for press-punching was a rectangular die with a longitudinal length of 30 mm and a lateral length of 5 mm. The seal materials A to G were produced by press-punching with the longitudinal direction of the rectangular die tilted at 45° with respect to the hair flow direction FD of the seal materials A to G.

[0106] [Relationship between hair flow direction and sealing ability] (Vibration testing equipment) FIG. 11 is a schematic diagram of a vibration test apparatus 500 used to measure the sealing properties of the sealing materials A, E, and G of the test sealing materials 1 and 2, respectively, and to measure the sealing property of the sealing material A of the test sealing material 3. The two double-headed arrows in FIG. 11 indicate the upper and lower sides and the front and rear sides of the vibration test apparatus 500, respectively. As shown in FIG. 11, the vibration test apparatus 500 has a toner box 530 held by a vibrator 510 via an angle 520. Toner is stored in the toner box 530. The toner box 530 is equipped with a cover 540. As shown in FIG. 11, a sealing material is attached to the lower end of the cover 540. The vibration test apparatus 500 tests for toner leakage from a gap between the sealing material and the toner box 530 at the lower end of the cover 540 due to vibration by the vibrator 510.

[0107] The cover 540 is configured so that its position can be adjusted by moving it up and down. By adjusting the position of the cover 540, the load applied to the cut pile of the sealing material can be adjusted. The vibrator 510 vibrates the toner box 530 back and forth via the angle 520. The degree of vibration is detected by the pickup sensor 550.

[0108] (Vibration test conditions) The sealing material A was attached to the gap between the toner box 530 and the cover 540 so that the pile flow direction FD was inclined at 45° toward the toner side. A load of 30 g / cm was applied to the cut pile of the sealing material A. 2 The vibration exciter 510 generates an acceleration of 10 m / s 2 After applying vibration to the toner box 530 for 5 minutes, it was confirmed whether or not there was any toner leakage. After confirming that there was no toner leakage, the acceleration was increased to 10 m / s 2 The acceleration was increased and vibration was applied again for 5 minutes, after which the presence or absence of toner leakage was checked. 2The vibration test was continued until the acceleration reached 0.05. The vibration test for sealing materials E and G was conducted under the same conditions as for sealing material A. Table 4 shows the relationship between toner leakage and acceleration for sealing materials A, E, and G made from test sealing material 1. Table 5 shows the relationship between toner leakage and acceleration for sealing materials A, E, and G made from test sealing material 2. Table 6 shows the relationship between toner leakage and acceleration for sealing material A made from test sealing material 3.

[0109] [Table 4]

[0110] [Table 5]

[0111] [Table 6]

[0112] As shown in Tables 4 and 5, the seal material G made from the test seal material 1 and the test seal material 2, which have the same hair flow direction FD as the arrangement direction AD (90°), both had an acceleration of 50 m / s 2 On the other hand, in the case of seal material E made from test seal material 1, where the angle of inclination of the hair flow direction FD is 45°, toner leakage occurs at an acceleration of 60 m / s 2 In addition, in the case of seal material E made from test seal material 2, toner leakage occurred at an acceleration of 70 m / s 2 It is as follows.

[0113] In the case of the seal material A made from the test seal material 1 and the test seal material 2, where the inclination angle of the hair flow direction FD is 0°, the acceleration is at least 100 m / s 2 On the other hand, in the case of seal material A made from test seal material 3, toner leakage did not occur until an acceleration of 60 m / s 2 It is as follows.

[0114] Tables 4 and 5 show experimentally that a sealing material having stripes in which at least two types of cut pile each form a line exhibits improved sealing properties as the pile flow direction FD of the cut pile approaches the perpendicular direction PD (0°), and decreased sealing properties as it approaches the arrangement direction AD (90°).

[0115] Furthermore, Tables 3 to 6 experimentally demonstrated that sealing material A made from test sealing material 1, in which the difference in reference angle between the piles constituting each stripe is 15.30°, and sealing material A made from test sealing material 2, in which the difference in reference angle is 14.84°, have better toner leakage suppression performance than sealing material A made from test sealing material 3, in which the difference in reference angle between the piles constituting each stripe is 34.18°. This suggests that sealing material with stripes can have better sealing properties by setting the difference in reference angle between the piles constituting each stripe to 30° or less.

[0116] [Difference in slant angle between first cut pile and second cut pile] Using a digital microscope (manufactured by KEYENCE Corporation), cross-sectional images (magnification 50x) of sealing materials A to G made from the test sealing material 1, cut along the pile flow direction FD, were obtained. Using the obtained cross-sectional images, the slant angles in the four slant directions OD were measured for each of the first cut pile and the second cut pile, based on the procedures (2-1) to (2-4) above. The difference in the slant angles of the first cut pile and the second cut pile of sealing materials A to G was calculated by subtracting the average value of the measured slant angles of the second cut pile from the average value of the measured slant angles of the first cut pile. The thickness of sealing materials A to G was measured at 3.7 gf / cm using a constant pressure thickness measuring instrument PG-11J (manufactured by Teclock Corporation). 2The thickness of the support portion was measured using the image dimension measurement function of the software attached to the digital microscope based on cross-sectional images of sealing materials A to G. Figure 12 is a graph showing the difference in the slant angle of the first cut pile and the second cut pile for each of sealing materials A to G made from the test sealing material 1.

[0117] As shown in Figure 12, in sealing material G, which has the same pile flow direction FD as the arrangement direction AD (90°), the difference in slant angle is 30° or more. On the other hand, in sealing material E, where the inclination angle of the pile flow direction FD is 45°, and sealing material F, where the inclination angle of the pile flow direction FD is 67.5°, the difference in slant angle is 20° or less. Furthermore, in sealing materials A to D, where the inclination angle of the pile flow direction FD is 33.75° or less, the difference in slant angle is 5° or less. From this, it has been experimentally shown that in sealing materials having stripes in which at least two types of cut pile each form a line, the difference in slant angle becomes smaller as the pile flow direction FD of the cut pile approaches the perpendicular direction PD (0°), and the difference in slant angle becomes larger as it approaches the arrangement direction AD (90°).

[0118] The differences in the slant angles of sealing materials A to G shown in Figure 12 and the vibration test results shown in Table 4 experimentally suggest that sealing materials with cut pile where the difference in slant angle is 20° or less, especially 5° or less, have improved sealing properties under low load conditions. Furthermore, the experiments also suggest that sealing materials with cut pile where the slant angle in the pile flow direction FD is 70° or less, especially 35° or less, have improved sealing properties under low load conditions.

[0119] [Relationship between hair flow direction and step height] Using the cross-sectional images of the above-mentioned sealing materials A to G, the steps (5-1) to (5-4) were followed to measure the step heights between the first cut pile and second cut pile lines in the sealing materials A to G. Fig. 13 is a graph showing the measurement results of the step heights for the sealing materials A to G made from the test sealing material 1.

[0120] As shown in Figure 13, in sealing material G, which has the same pile flow direction FD as the arrangement direction AD (90°), the step is 0.50 mm or more. On the other hand, in sealing material E, where the inclination angle of the pile flow direction FD is 45°, and sealing material F, where the inclination angle of the pile flow direction FD is 67.5°, the step is 0.40 mm or less. Furthermore, in sealing materials A to D, where the inclination angle of the pile flow direction FD is 33.75° or less, the step is 0.20 mm or less. From this, it has been experimentally shown that in sealing materials having stripes in which at least two types of cut pile each form a line, the step becomes smaller as the pile flow direction FD of the cut pile approaches the perpendicular direction PD (0°), and the step becomes larger as it approaches the arrangement direction AD (90°).

[0121] The step heights of sealing materials A to G shown in Figure 13 and the vibration test results shown in Table 4 experimentally suggest that sealing materials with cut pile layers with step heights of 0.40 mm or less, especially 0.20 mm or less, have improved sealing properties under low load conditions. Furthermore, the experiment also suggests that sealing materials with cut pile layers with an inclination angle of 70° or less, especially 35° or less in the pile flow direction FD, have improved sealing properties under low load conditions. [Explanation of symbols]

[0122] 1, 5, 7 Sealing material 2, 6, 8 Seal material 10 Cut pile fabric 110 cut pile 111 First Cut Pile 112 Second Cut Pile 113 Third Cut Pile 120 Fabric section 121 Ground thread layer 122 Coating layer 20 Support part 210 Adhesive layer 220 Supporter layer 230 Adhesive layer 3 Measurement seal material 11 Cut pile fabric for measuring sticker material 110a Cut pile measuring sticker material 121a Ground layer of measuring seal material 122a Coating layer of measurement seal material 21 Support for measuring seal material 210a Adhesive layer of measuring seal material 220a Support layer of measuring seal material 230a Adhesive layer of measurement seal material 4. Pile knitting 40 Cut pile knitting 111a First pile yarn 112a Second pile yarn 121a Ground thread 500 Vibration Test Equipment 510 Vibrator 520 Angle 530 Toner Box 540 Cover 550 Pickup Sensor AD1 Arrangement direction of first cut pile AD2 Second cut pile arrangement direction AD3 Third cut pile arrangement direction FD Hair flow direction COA clipping area OD oblique hair direction FT Fiber tip CP intersection position α Reference angle SL1 Reference line on the surface of the seal material for measurement UL1 Reference line on the underside of the cut pile fabric of the measurement sticker material SW1 Width indicating the thickness of cut pile fabric of measuring sticker material ML1 Measurement sticker material cut pile fabric thickness midline ML2 Measurement sticker material cut pile fabric thickness quarter line δ oblique angle SL2 Reference line on the surface of the seal material UL2 Reference line on the underside of the cut pile fabric of the sealing material SW2 Width indicating the thickness of the cut pile fabric of the sealing material ML3 Sealing material cut pile fabric thickness midline ML4 Sealing material cut pile fabric thickness quarter line θ Inclination angle in the direction of hair flow TBE Cut pile fiber tips located on both ends MP: The midpoint of the line connecting the tips of the fibers at both ends of the cut pile The roots of CPR cut pile DL step DLL: Reference line on the surface of cut pile that is prone to collapse LP Loop Pile LFD Loop Flow Direction LD1 Weft knitting direction of first pile yarn LD2 Second pile yarn weft knitting direction

Claims

1. A sealing material having cut pile, the sealing material has at least two types of cut pile formed by shirring a woven or knitted fabric containing at least two types of pile yarn; The at least two types of cut pile have different collapse easiness, the at least two types of cut pile constitute stripes that form lines on the surface of the sealing material, The cut pile forming the line has a pile flow direction inclined toward the cut pile forming the adjacent line on one side. Sealing material.

2. 2. The sealing material according to claim 1, wherein the sealing material has the at least two types of cut pile formed by shirring a knitted fabric in which the at least two types of pile yarns are weft knitted to form stripes.

3. The difference in the tendency to collapse indicates that there is a difference in the reference angle between the at least two types of cut pile. The reference angle is For each of the at least two types of pile yarns, a seal material for measurement is produced having a cut pile formed by shirring a woven fabric containing only one type of pile yarn selected from the at least two types of pile yarns; 10 g / cm for the cut pile of the seal material for measurement ２ With the load applied, the sample was heated in an oven at a temperature of 160°C for 5 minutes, and then left in the oven for 1 day to return to room temperature, after which the weight was removed. The value is obtained based on the angle of the cut pile in the seal material for measurement that has been subjected to the oven treatment. The sealing material according to claim 1 .

4. The sealing material according to claim 3 , wherein the difference in reference angle between the at least two types of cut pile is 30° or less.

5. The at least two types of pile yarns are A combination of a yarn made of PTFE, having a thickness of 440 decitex and a cross-sectional fiber count of 60, and a yarn made of Berima, having a thickness of 84 decitex and a cross-sectional fiber count of 28, or A combination of a yarn made of acrylic fiber, 393.7 decitex in thickness, and 236 cross-sectional fibers, and a yarn made of rayon fiber, 500 decitex in thickness, and 132 cross-sectional fibers, The sealing material according to claim 1 ,

6. The hair flow direction was determined using a steam iron with steam, temperature 190°C, moving speed 2cm / sec, and pressure 2kg / cm. ２ The sealing material according to claim 1, which is formed by a slanting treatment in which ironing is performed under the conditions of

7. The sealing material according to claim 6, wherein an average slant angle of the at least two types of cut pile formed by the slant treatment relative to the surface of the sealing material is 30° or more and 70° or less.

8. The hair flow direction is When a perpendicular direction perpendicular to the arrangement direction of the cut piles forming the line and directed toward the arrangement direction of the cut piles forming the adjacent line on one side is defined as 0°, The sealing material according to claim 1 , which is inclined within a range of ±70° with respect to the perpendicular direction.

9. The sealing material according to claim 1 , wherein a step occurring between each of the stripe lines on the surface of the sealing material is 0.4 mm or less.

10. The sealing material according to claim 1 , wherein the sealing material is adapted to prevent the inflow and outflow of solids.

11. The sealing material according to claim 10, wherein the sealing material is used to prevent toner leakage from an image forming device in an electrophotographic apparatus.

12. The sealing material according to claim 1 , wherein the sealing material is used to prevent the inflow and outflow of a liquid.

13. The sealing material according to claim 12, wherein at least one of the at least two types of cut pile is treated to be water repellent.

Images