Seal member, and method of manufacturing seal member

Abstract

To provide a seal member for permitting the movement of gas while suppressing the movement of solids and water or water solution.SOLUTION: The seal member includes a pile material as a seal body, the pile material having a cut pile woven / knit fabric. To the pile material, a dry matter of a fluororesin emulsion is attached. The fiber density of a cut pile yarn of the cut pile woven / knit fabric is 700 / mm2 or more.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a seal member and a method for manufacturing the seal member. [Background technology]

[0002] A seal member using pile material for the seal body is known. For example, Patent Document 1 proposes a sealing member for powder that uses cut pile fabric, which is a pile material. Seal members using pile material have low sliding resistance when in sliding contact with a mating material, and are said to be less likely to generate frictional heat than seal members with a rubber seal body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-127832 Summary of the Invention [Problem to be solved by the invention]

[0004] Because pile material is a fibrous material, it was thought that while sealing members using pile material could prevent the movement of solids such as powder from one space to the other, it would be difficult to prevent the movement of water. [Means for solving the problem]

[0005] The present invention provides a seal member that employs pile material in the seal body and is capable of sealing out water or an aqueous solution, and a method for manufacturing the same.

[0006] (1) The sealing member of the present invention is A seal member having a pile material as a seal body, The pile material has a cut pile woven or knitted fabric, The pile material is coated with dried fluororesin emulsion. The fiber density of the cut pile yarn in the above cut pile woven or knitted fabric is 700 threads / mm 2 That's all.

[0007] (2) In the seal member of (1) above, the preferred amount of the dried fluororesin emulsion adhering to the seal body is 0.025 mg / mm 2 That's all.

[0008] (3) In the sealing member of (1) or (2) above, the cut pile yarn preferably includes a split polyester / nylon composite yarn.

[0009] (4) In the sealing member of any one of (1) to (3) above, the cut pile yarn preferably has an average fiber diameter of 5 μm or more and 15 μm or less.

[0010] (5) The method for producing a sealing member of the present invention comprises: A method for manufacturing a seal member having a pile material as a seal body, A step (1) of applying a treatment liquid containing a fluororesin emulsion to a cut pile woven or knitted fabric; a step (2) of heating the cut pile woven or knitted fabric to which the treatment liquid has been applied; and The fiber density of the cut pile yarn in the above cut pile woven or knitted fabric is 700 threads / mm 2 That's all.

[0011] (6) In the method for producing a sealing member according to (5) above, the step (1) preferably includes the steps of immersing the cut pile woven or knitted fabric in the treatment liquid, and passing the cut pile woven or knitted fabric, which has been removed from the treatment liquid, between a pair of rolls.

[0012] (7) In the method for producing a sealing member according to (5) or (6), the treatment liquid containing the fluororesin emulsion preferably contains a fluororesin, a crosslinking agent, and a solvent; The step (2) includes a first heating step of heating at 70°C or higher and 90°C or lower, and a second heating step of heating at 140°C or higher and 170°C or lower. [Effects of the Invention]

[0013] According to the present invention, a sealing member can be provided that, by being placed between a space on one side and a space on the other side, can suppress the movement of solids and water or aqueous solutions between the two spaces while allowing the movement of gas between the two spaces. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 2 is a perspective view illustrating an example of a sealing member according to an embodiment of the present invention. [Figure 2] 2 is a front view of the sealing member of FIG. 1 in a state where it is bent into an annular shape. [Figure 3] FIG. 4 is an enlarged view illustrating an example of a seal body. [Figure 4] 2A and 2B are diagrams illustrating an example of use of the sealing member of FIG. 1. [Figure 5] FIG. 2 is a perspective view showing a jig used to evaluate the water-blocking performance of the sealing member. [Figure 6] FIG. 6 is an exploded perspective view of the jig shown in FIG. 5. [Figure 7] FIG. 6 is a front view of the jig shown in FIG. 5. [Figure 8] FIG. 6 is a cross-sectional view taken along line AA in FIG. 5. [Figure 9] FIG. 9 is a partially enlarged view of FIG. 8.

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. <Sealing material> Fig. 1 is a perspective view showing an example of a sealing member according to an embodiment of the present invention. Fig. 2 is a front view of the sealing member of Fig. 1 in a state where it is bent into an annular shape. Fig. 3 is an enlarged view illustrating an example of a cut pile fabric constituting the seal body. Fig. 4 is a diagram showing an example of use of the sealing member 100 of Fig. 1.

[0016] The seal member 100 in FIG. 1 is a seal member that is attached around a shaft when used. The seal member 100 has a seal body 110 having a cut pile woven or knitted fabric as a pile material, a support member 120, and an adhesive layer 130 (see FIG. 4) not shown in FIG. 1. The seal body 110 is fixed to the support member 120 via the adhesive layer 130.

[0017] The seal member 100 is used by bending it into an annular shape, as shown in Fig. 2. This allows it to be attached around an axis. The adhesive layer 130 is formed using an adhesive, double-sided tape, or the like.

[0018] The support member 120 may be any member capable of supporting the cut pile woven or knitted fabric as the seal body 110. The seal member 100 of this embodiment is attached to a housing or the like by utilizing the restoring force of the support member 120. For this reason, it is preferable that the support member 120 be made of an elastic material. On the other hand, the support member 120 does not necessarily have to be an elastic body, and may be made of metal or resin, which has little elasticity.

[0019] Examples of the elastic body include a shape-retaining sheet and a stainless steel strip for a spring. Examples of the shape-retaining sheet include a sheet made of a stretched polyolefin resin. The shape-retaining sheet may be a commercially available product, such as "Forte" manufactured by Sekisui Chemical Co., Ltd. The stainless steel strip for springs may be a stainless steel strip for springs conforming to JIS G 4313 (2011). A specific example is a SUS thin plate.

[0020] The cut pile woven / knitted fabric comprises a base fabric and a large number of cut pile yarns. The concept of the cut pile woven / knitted fabric includes both cut pile woven fabrics in which the base fabric is a woven fabric and cut pile knitted fabrics in which the base fabric is a knitted fabric. The cut pile woven or knitted fabric used for the seal body in the embodiment of the present invention may be a cut pile woven fabric or a cut pile knitted fabric. The seal body shown in FIG. 3 is an example of a seal body 110 having a cut pile fabric 20.

[0021] In the cut pile fabric 20 shown in FIG. 3, a base fabric 23 made of a woven fabric has front warp yarns 24, front weft yarns 25, back warp yarns 26, and back weft yarns 27. The front warp threads 24 and the front weft threads 25 are woven as shown on the front side (upper side in FIG. 3) to form the front fabric of the base fabric 23. The back warp threads 26 and the back weft threads 27 are woven as shown on the back side (lower side in FIG. 3) of the front warp threads 24 and the front weft threads 25 to form the lining of the base fabric 23.

[0022] 3, the numerous cut pile yarns 28 are formed by cutting and raising pile yarns woven across the entire surface of the base fabric 23. In this embodiment, each cut pile yarn 28 is woven into the back weft yarn 27 and fixed to the base fabric 23 (back warp yarns 26 and back weft yarns 27) by melting a heat-fusible yarn (not shown) contained in the back weft yarn 27.

[0023] The cut pile fabric 20 has been treated with a treatment liquid containing a fluororesin emulsion, so that the dried fluororesin emulsion adheres to the cut pile fabric 20. The dried fluororesin emulsion needs to adhere to at least each cut pile yarn 28, but it is preferable that it adheres to the surface of the base fabric 23 (the surface on the cut pile yarn side) as well as each cut pile yarn 28.

[0024] Each cut pile yarn 28 is raised from the surface (surface warp yarns 24 and surface weft yarns 25) of the base fabric 23 toward the surface side (see FIG. 3). In the seal body 110, each cut pile yarn 28, particularly the tips of each cut pile yarn 28, comes into contact with the mating material. Each cut pile yarn 28 is made up of a plurality of fibers 28a.

[0025] Each cut pile yarn 28 is made of, for example, polyester fiber, polyamide (nylon) fiber, acrylic fiber, cotton fiber, rayon fiber, urethane fiber, or the like. The cut pile yarns 28 may contain two or more types of fibers as the fibers 28a.

[0026] Each cut pile yarn 28 may be a composite yarn (conjugate yarn), or may be a split composite yarn. That is, each fiber of the split composite yarn may be the fiber 28a of the cut pile yarn 28. As the composite yarn, a splittable polyester / nylon composite yarn is preferred, from the viewpoint that it is easy to reduce the average fiber diameter of the fibers 28a and to increase the fiber density. As a splittable polyester / nylon composite yarn, for example, Belima manufactured by KB Seiren Co., Ltd. can be used. The cut pile yarn fibers 28a may be made by splitting two or more types of composite yarns.

[0027] The fiber density of the cut pile yarns of the cut pile woven or knitted fabric constituting the seal body 110 (the number of fibers 28a constituting the cut pile yarns 28 per unit area) is 700 fibers / mm 2 That's all. Fiber density is 700 threads / mm 2 If it is less than this, the sealing performance of the seal member 20 will be low and the water-blocking performance will not be ensured. The upper limit of the fiber density of the cut pile woven or knitted fabric is, for example, 2700 threads / mm 2 When the fiber density is high, the contact area with the mating material increases, and the friction resistance also increases. The preferred fiber density of the cut pile woven or knitted fabric is 700 threads / mm 2 Over 1500 lines / mm 2 The following is the result.

[0028] The average fiber diameter of the cut pile yarns of the cut pile woven or knitted fabric (the average fiber diameter of the fibers 28a constituting the cut pile yarns 28) is preferably 5 μm or more and 15 μm or less. If the average fiber diameter is less than 5 μm, the cut pile yarns will be too flexible, and the pressing force of the cut pile yarns against the mating material will be insufficient, which will tend to reduce the sealing ability of the seal member 100. On the other hand, if the average fiber diameter exceeds 15 μm, the friction resistance with the mating material tends to increase. The average fiber diameter in the cut pile woven or knitted fabric is more preferably 5 μm or more and 13 μm or less.

[0029] The average fiber diameter in the cut pile woven or knitted fabric is determined by the fineness (D) and specific gravity (g / cm) of the fibers constituting the raw yarns that are woven into the cut pile yarns. 3 ) is calculated using the following formula (1). The raw yarn is also made up of multiple fibers.

[0030]

number

[0031] If the cut pile yarns are composed of multiple types of fibers, the average fineness and average specific gravity of the fibers constituting the raw yarn that will be woven into the cut pile yarns are calculated in advance, taking into account the types and ratios of the fibers contained in the raw yarn, and the average fiber diameter is calculated using the obtained average fineness and average specific gravity.If the raw yarn is splittable, the average fineness and average specific gravity after splitting are calculated in advance.

[0032] A dried fluororesin emulsion is adhered to the cut pile woven or knitted fabric that constitutes the seal body 110. The dried fluororesin emulsion contains, for example, a fluororesin and an additive such as a surfactant. The fluororesin contained in the dried emulsion may be crosslinked.

[0033] The preferred adhesion amount of the dried fluororesin emulsion is 0.025 mg / mm2 in terms of the amount of adhesion per unit area of ​​the cut pile woven or knitted fabric. 2 That's all. The above adhesion amount is 0.025 mg / mm 2 By setting the above, good water-blocking performance can be ensured. The upper limit of the amount of adhesion is not particularly limited, but is, for example, 0.040 mg / mm 2 is. A more preferable adhesion amount per unit area of ​​the dried fluororesin emulsion is 0.025 mg / mm 2 More than 0.035 mg / mm 2 The following is the result.

[0034] Any known adhesive or double-sided tape can be used as long as it can fix the cut pile woven / knitted fabric to the support member 120. Therefore, the adhesive or double-sided tape can be selected appropriately taking into consideration the materials of the cut pile woven / knitted fabric and the support member.

[0035] Next, a method for manufacturing a sealing member according to an embodiment of the present invention will be described. Here, a method for manufacturing the seal member 100 will be described. The method for manufacturing the seal member 100 includes the steps of: A step (1) of applying a treatment liquid containing a fluororesin emulsion to a cut pile woven or knitted fabric; a step (2) of heating the cut pile woven or knitted fabric to which the treatment liquid has been applied; It has.

[0036] In step (1), a treatment liquid containing a fluororesin emulsion is applied to the cut pile woven or knitted fabric by, for example, immersing the cut pile woven or knitted fabric in the treatment liquid or spraying the treatment liquid onto the cut pile woven or knitted fabric. In step (1), the cut pile woven or knitted fabric may be immersed in the treatment solution and then pulled out of the treatment solution and passed between a pair of rolls, thereby adjusting the amount of treatment solution containing the fluororesin emulsion applied.

[0037] The treatment liquid containing the fluororesin emulsion contains, for example, a fluororesin, a crosslinking agent, and a solvent. The treatment liquid may further contain additives such as a surfactant.

[0038] When the cut pile yarn constituting the cut pile woven or knitted fabric is a splittable composite yarn (conjugate yarn), a step of splitting the composite yarn is carried out before the above step (1).

[0039] In step (2), it is preferable to carry out a first heating step in which heating is carried out at 70°C or higher and 90°C or lower, and a second heating step in which heating is carried out at 140°C or higher and 170°C or lower. In particular, when a treatment liquid containing a fluororesin, a crosslinking agent, and a solvent is used as the treatment liquid containing a fluororesin emulsion, it is preferable to carry out the heating step under the above conditions. In this case, the treatment liquid is dried in the first heating step, and the fluororesin contained in the treatment liquid is crosslinked in the second heating step. By carrying out step (2) in this manner, the adhesive strength of the fluorine-based treatment agent to the cut pile woven or knitted fabric can be increased.

[0040] In step (2), the treatment times for the first and second heating steps may be set according to the dimensions of the cut pile woven or knitted fabric to which the treatment liquid has been applied. The treatment time for the first heating step is, for example, 1 to 5 hours, and the treatment time for the second heating step is, for example, 1 to 10 minutes.

[0041] After steps (1) and (2) are completed, the cut pile woven or knitted fabric with the dried fluororesin emulsion adhered thereto is fixed to the support member 120, thereby completing the seal member 100. Steps (1) and (2) may be carried out after the cut pile woven or knitted fabric is fixed to the support member 120.

[0042] Next, a method of using the seal member 110 will be described. The seal member 110 is used in a structure 200 in which a through hole 211 is provided in a housing 210 and a shaft 201 is inserted through this through hole 211, for example. Specifically, the sealing member 110 is attached such that the support member 120 is fitted into a circumferential groove 212 provided in the wall surface 211a of the through hole 221, and the seal body (the tip of the cut pile yarn) comes into contact with the circumferential surface of the shaft 201. This allows the sealing member 110 to seal the gap between the wall surface 211a of the through hole 221 and the circumferential surface of the shaft 201.

[0043] By attaching the seal member 100 in this manner, the seal member 100 can separate the outside of the housing 200 (first space) from the inside of the housing 200 (second space). The sealing member 100 can restrict the permeation of not only solids such as powder but also water and aqueous solutions (hereinafter, water and aqueous solutions will be collectively referred to as water, etc.), and can therefore prevent the movement of solids, water, etc. from the first space to the second space, as well as from the second space to the first space.

[0044] The aqueous solution whose movement is prevented by the sealing member is preferably an aqueous solution that does not cause corrosion or other damage to the seal body. If an attempt is made to seal an aqueous solution that causes corrosion or other damage to the seal body, the durability of the sealing member may be significantly impaired. An example of a preferred aqueous solution is saline solution.

[0045] The seal member 100 uses a cut pile woven or knitted fabric with a dried fluororesin emulsion attached to the seal body, and is therefore capable of allowing gas to pass through. Therefore, when used in the structure 200 shown in FIG. 4, movement of gas such as air between the outside of the housing 200 (first space) and the inside of the housing 200 (second space) can be permitted.

[0046] Therefore, for example, by creating a pressure difference between the first space and the second space so that gas moves from the inside of the housing 200 (second space) to the outside of the housing 200 (first space), it is possible to prevent foreign matter, etc. from approaching the through hole 211 of the housing 210 from the outside. Furthermore, for example, by providing a pressure difference between the first space and the second space so that gas moves from the outside of the housing 200 (first space) toward the inside of the housing 200 (second space), gas can be continuously sent into the housing 200. This makes it difficult for foreign matter to adhere to the inner wall of the housing 210 around the through-hole 211.

[0047] 4, the seal body 110 that comes into contact with the circumferential surface of the shaft 201 is a cut pile woven or knitted fabric to which a dried fluororesin emulsion is attached. Therefore, when the shaft 201 rotates or reciprocates in the axial direction, the sliding resistance between the seal body 110 and the shaft 201 can be kept low.

[0048] The sealing member according to the embodiment of the present invention is suitably used to seal a location where the intrusion of water or the like is prevented but the movement of air or the like is permitted. The sealing member according to the embodiment of the present invention can be used in, for example, machine tools, electronic devices, cell culture devices, and the like.

[0049] Next, an evaluation test conducted by the present inventors to verify the performance of the sealing member according to the embodiment of the present invention will be described. Fig. 5 is a perspective view showing a jig used to evaluate the water-blocking performance of the sealing member. Fig. 6 is an exploded perspective view of the jig shown in Fig. 5. Fig. 7 is a front view of the jig shown in Fig. 5. Fig. 8 is a cross-sectional view taken along line AA in Fig. 5. Fig. 9 is a partially enlarged view of region B in Fig. 8.

[0050] Here, cut pile woven / knitted fabrics A to E were prepared, and for each cut pile woven / knitted fabric, evaluation samples were prepared that were treated with a treatment liquid containing a fluororesin emulsion, that were treated with a silicone-based water-repellent agent, and that were not treated with water-repellent treatment, and the water-blocking performance was evaluated.

[0051] (Cut pile woven / knitted fabric A) This is a cut pile fabric with a base fabric made of polyester fiber. The cut pile yarn is made of split polyester / nylon composite yarn. The cut pile yarn has a fineness of 0.52D and a specific gravity of 1.38g / cm. 3 The average fiber diameter and fiber density are shown in Table 1. In the cut pile woven / knitted fabric A, the fineness and specific gravity of the cut pile yarn are the average fineness and average specific gravity of the fibers (fibers after splitting) that make up the raw yarn that is woven into the cut pile yarn, and are calculated taking into account the types and ratios of fibers contained in this raw yarn.

[0052] (Cut pile woven / knitted fabric B) This is a cut pile knitted fabric with a base fabric made of polyester fiber, and the cut pile yarn is made of an acrylic / cotton composite yarn. The cut pile yarn has a fineness of 1.67D and a specific gravity of 1.17g / cm. 3 The average fiber diameter and fiber density are shown in Table 1. In cut pile woven / knitted fabric B, the fineness and specific gravity of the cut pile yarn are the average fineness and average specific gravity of the fibers constituting the raw yarn that is woven into the cut pile yarn, and are calculated taking into account the types and ratios of fibers contained in this raw yarn. The same applies to the fineness and specific gravity of the cut pile yarn in cut pile woven / knitted fabric D and cut pile E.

[0053] (Cut pile woven / knitted fabric C) This cut pile fabric has a base fabric made of polyester fiber, and the cut pile yarn is made of PTFE fiber. The cut pile yarn has a fineness of 6.60D and a specific gravity of 2.30g / cm. 3 The average fiber diameter and fiber density are shown in Table 1.

[0054] (Cut pile woven / knitted fabric D) This is a cut pile fabric with a base fabric made of polyester fiber. The cut pile yarn is made of an acrylic / rayon composite yarn (first material) and a split polyester / nylon composite yarn (second material). The cut pile yarn has a fineness of 0.85D and a specific gravity of 1.17g / cm. 3 The average fiber diameter and fiber density are shown in Table 1.

[0055] (Cut pile woven / knitted fabric E) This is a cut pile fabric with a base fabric made of polyester fiber. The cut pile yarn is made of an acrylic / rayon composite yarn (first material) and an acrylic fiber (second material). The cut pile yarn has a fineness of 1.33D and a specific gravity of 1.17g / cm. 3 The average fiber diameter and fiber density are shown in Table 1.

[0056] (Treatment with fluororesin emulsion) Each of the cut pile woven / knitted fabrics A to E, cut to a size of 50 mm x 50 mm, was immersed in a treatment liquid containing a fluororesin emulsion (Rikenpalan FG-3700, manufactured by Miki Riken Kogyo Co., Ltd., diluted concentration: 3%) for 60 seconds, and then removed from the treatment liquid and allowed to stand for 30 seconds. Thereafter, the substrate was dried by heating in an oven at 80°C for 1 hour, and then heated at 160°C for 3 minutes to crosslink the fluororesin contained in the treatment liquid. Finally, the sample was cut into 5 mm x 20 mm pieces to prepare evaluation samples with the dried fluororesin emulsion attached. Table 1 shows the amount of dried matter attached to the treatment liquid containing the fluororesin emulsion.

[0057] (treated with silicone-based water-repellent agent) Each cut pile woven / knitted fabric A to E was cut to a size of 50 mm x 50 mm and immersed in a silicone-based water-repellent treatment liquid (Rikenpalan SG-54, manufactured by Miki Riken Kogyo Co., Ltd., diluted at 3%) for 60 seconds, and then removed from the treatment liquid and allowed to stand for 30 seconds. Thereafter, the substrate was dried by heating in an oven at 80°C for 1 hour, and then heated at 160°C for 3 minutes to crosslink the water repellent treatment agent. Finally, the sample was cut into 5 mm x 20 mm pieces to prepare evaluation samples coated with a silicone-based water repellent agent.

[0058] (Untreated with water repellent) Each of the cut pile woven / knitted fabrics A to E was cut into a size of 5 mm x 20 mm to prepare an evaluation sample that was not subjected to a water-repellent treatment.

[0059] (Performance evaluation) The water-blocking performance of the sealing member was evaluated using each evaluation sample. [jig] The waterproof performance was evaluated using a waterproof performance evaluation jig 300 shown in FIGS. 8 is called the upper side of the jig, the lower side of the jig, the left side of the jig in FIG. 8 is called the front side of the jig, and the left side of the jig in FIG. 8 is called the rear side of the jig.

[0060] The jig 300 includes a water storage member 310 having a water storage space 311, a cover member 320, and a bolt 331 for fixing the cover member 320 to the water storage member 310. The water storage member 310 and the lid member 320 are both made of resin and are produced using a 3D printer.

[0061] The water storage member 310 has a water storage space 311 and a water injection channel 312 connected to the water storage space 311. The water injection channel 312 has a water injection port 312a on the top surface of the jig 300. The water storage space 311 is open on the front side. The water storage member 310 has a recess 313 on the front side into which the cover member 320 is fitted.

[0062] The lid member 320 is a plate-like member having bolt holes 321. The lid member has a cutout portion 322 on the underside. The lid member 320 is designed so that when fitted into the recess 313 of the water storage member 310, no gap is created between the lid member 320 and the water storage member 310, except for the cutout portion 322. Furthermore, when assembling the jig 300, grease is applied to the contact surfaces between the water storage member 310 and the lid member 320. It has been confirmed that when water is supplied to the water storage space 311 after the jig 300 is assembled, no water leaks from any portion other than the notch 322.

[0063] [Evaluation method] The water-blocking evaluation using the jig 300 is performed by fitting the cover member 320 into the recess 313 and fixing it to the water storage member 310 with the bolt 311, and attaching the evaluation sample S to the cutout portion 322 in a predetermined orientation. The evaluation sample S is attached in a direction such that the cut pile yarn contacts the lower side surface of the lid member 423.

[0064] In this evaluation, the evaluation sample S is attached to the jig 300 so that a certain load is applied to the evaluation sample S. Specifically, the evaluation sample S is attached so that a load of 4.9 N is applied in the thickness direction (vertical direction in FIG. 9) of the evaluation sample S. The load applied to the evaluation sample S is adjusted by the thickness T of the notch 322. Therefore, in this evaluation, a plurality of lid members 320 with adjusted thicknesses T of the cutout portions 322 are prepared for each evaluation sample S, and the evaluation is performed by replacing the lid member 320 for each evaluation sample S.

[0065] In this evaluation, evaluation sample S was attached to jig 300, and black-colored water was supplied from water inlet 312a to water storage space 311, and the time from the start of supply until water began to leak from the notch was measured. The results are shown in Table 1. Measurement times of less than one hour were rounded down. Therefore, the evaluation time "0 hours" shown in Table 1 means that water leakage occurred within one hour of the start of water injection. Furthermore, if no water leakage occurred 120 hours after water injection, the evaluation was terminated at that point, and the evaluation result was recorded as "120 hours."

[0066] [Table 1]

[0067] [result] As is clear from the results shown in Table 1, it was revealed that water-blocking performance can be ensured by treating cut pile woven or knitted fabrics having a specified fiber density with a treatment solution containing a fluororesin emulsion. This demonstrates that the sealing member according to the embodiment of the present invention can suppress the movement of water.

[0068] <Other embodiments> The seal member according to the embodiment of the present invention does not necessarily have to include a support member, and may be composed of only the seal body. Therefore, the sealing member according to the embodiment of the present invention may be made up of only the cut pile woven or knitted fabric to which the dried fluororesin emulsion is attached.

[0069] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above meaning, and is intended to include all modifications within the scope and meaning equivalent to the claims. [Explanation of symbols]

[0070] 23 Base fabric 28 Cut pile yarn 28a Fiber 100 sealing member 110 Seal body 120 Support member 210 Housing 300 Evaluation Jig

Claims

1. A seal member having a pile material as a seal body, The pile material has a cut pile woven or knitted fabric, The pile material has a dried fluororesin emulsion attached thereto, The fiber density of the cut pile yarn of the cut pile woven or knitted fabric is 700 threads / mm ２ That's it for the sealing member.

2. The amount of the dried fluororesin emulsion adhering to the seal body is 0.025 mg / mm ２ The sealing member according to claim 1 .

3. 3. The sealing member according to claim 1, wherein the cut pile yarn comprises split polyester / nylon composite yarn.

4. 3. The sealing member according to claim 1, wherein the cut pile yarn has an average fiber diameter of 5 [mu]m or more and 15 [mu]m or less.

5. A method for manufacturing a seal member having a pile material as a seal body, A step (1) of applying a treatment liquid containing a fluororesin emulsion to a cut pile woven or knitted fabric; a step (2) of heating the cut pile woven or knitted fabric to which the treatment liquid has been applied; and The fiber density of the cut pile yarn of the cut pile woven or knitted fabric is 700 threads / mm ２ This completes the method for manufacturing the sealing member.

6. 6. The method for producing a sealing member according to claim 5, wherein the step (1) comprises the steps of immersing the cut pile woven or knitted fabric in the treatment liquid and passing the cut pile woven or knitted fabric, which has been removed from the treatment liquid, between a pair of rolls.

7. the treatment liquid containing the fluororesin emulsion contains a fluororesin, a crosslinking agent, and a solvent; The step (2) includes a first heating step of heating at 70°C or higher and 90°C or lower, and a second heating step of heating at 140°C or higher and 170°C or lower. The method for manufacturing the sealing member according to claim 5 or 6.

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