Membranous body

Abstract

To provide a high-strength membranous body.SOLUTION: A membranous body includes a super fiber layer configured with super fiber, and resin solvent layers that are in contact with the super fiber layer and formed to interpose the super fiber layer therebetween. The super fiber layer has been subjected to at least one of a deoiling treatment and a hydrophilic treatment.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to the technical field of membranes.

Background Art

[0002] As this type of membrane, a membrane composed of super fibers has been proposed (see Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] There is room for improvement in the technologies described in Patent Documents 1 and 2 above.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a high-strength membrane.

Means for Solving the Problems

[0006] A membrane according to one aspect of the present invention is a membrane including a super fiber layer composed of super fibers and a resin solvent layer that is in contact with the super fiber layer and is formed so as to sandwich the super fiber layer, wherein at least one of degreasing treatment and hydrophilic treatment is performed on the super fiber layer.

Brief Description of the Drawings

[0007]

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Embodiments for Carrying Out the Invention

[0008] Embodiments related to the film body will be described with reference to FIGS. 1 to 13. In FIG. 1, the film body 10 includes a super fiber layer 11 formed of super fibers, and resin solvent layers 12 and 13 that are in contact with the super fiber layer 11 and are formed so as to sandwich the super fiber layer 11.

[0009] (Configuration of the film body 10) Examples of super fibers include ultra-high-strength polyethylene (ultra-high molecular weight polyethylene fiber), para-aramid fiber, polyarylate fiber, PBO (polyparaphenylene benzobisoxazole) fiber, carbon fiber, glass fiber, metal fiber, and ceramic fiber.

[0010] As shown in FIG. 2, the super fiber layer 11 has a plurality of yarns 11a extending in a first direction and a plurality of yarns 11b extending in a second direction different from the first direction. The plurality of yarns 11a and 11b are yarns made of super fibers. As shown in FIG. 2, the yarns 11a and 11b are intertwined with each other so that the relative position variation between the yarn 11a and the yarn 11b is suppressed. By intertwining the yarns 11a and 11b, a fabric using super fiber yarns may be formed. That is, the super fiber layer 11 may be composed of a fabric using super fiber yarns. Examples of the fabric include plain weave, twill weave, and satin weave.

[0011] In addition, the super fiber layer 11 may have one or more super fiber-containing yarns extending in a third direction different from the first direction and the second direction. In this case, the yarns 11a, 11b, and the yarn extending in the third direction may be intertwined with each other so that the relative position variation among the yarn 11a, the yarn 11b, and the yarn extending in the third direction is suppressed. In this case, the super fiber layer 11 may be composed of a fabric woven by the yarns 11a, 11b, and the yarn extending in the third direction.

[0012] In addition, the yarn 11a and the yarn 11b may be constrained by at least one of sewing thread and molten yarn so that the relative position variation between the yarn 11a and the yarn 11b is suppressed. In this case, the yarn 11a and the yarn 11b may not be intertwined with each other. For example, the super fiber layer 11 may have a first layer composed of a plurality of yarns 11a and a second layer composed of a plurality of yarns 11b. And at least one yarn 11a included in the first layer and at least one yarn 11b included in the second layer may be constrained by at least one of sewing thread and molten yarn. That is, the super fiber layer 11 may be formed by constraining the first layer and the second layer by at least one of sewing thread and molten yarn.

[0013] Further, when the super fiber layer 11 has threads extending in the above-described third direction in addition to the threads 11a and 11b, at least two of the thread 11a, the thread 11b, and the threads extending in the third direction may be constrained by at least one of the sewing thread and the molten thread. In this case, the thread 11a, the thread 11b, and the threads extending in the third direction may not be intertwined with each other. For example, the super fiber layer 11 may have a first layer composed of a plurality of threads 11a, a second layer composed of a plurality of threads 11b, and a third layer composed of a plurality of threads extending in the third direction. And at least two of at least one thread 11a included in the first layer, at least one thread 11b included in the second layer, and at least one thread included in the third layer may be constrained by at least one of the sewing thread and the molten thread. That is, the super fiber layer 11 may be formed by constraining the first layer, the second layer, and the third layer by at least one of the sewing thread and the molten thread.

[0014] Further, the super fiber layer 11 may have a plurality of threads extending in one direction instead of the threads 11a and 11b. The plurality of threads are threads containing super fibers. Further, the one direction may be the same as any of the above-described first direction, second direction, and third direction, or may be a direction different from the first direction, second direction, and third direction. Two adjacent threads among the plurality of threads extending in one direction may be intertwined with each other so that the relative positions of the two threads are suppressed from fluctuating. By intertwining two adjacent threads among the plurality of threads extending in one direction, a knitted fabric using super fiber threads may be formed. That is, the super fiber layer 11 may be composed of a knitted fabric using super fiber threads. Examples of knitted fabrics include plain knitting, rubber knitting, pearl knitting, denim knitting, cord knitting, and atlas knitting.

[0015] The resin solvent layers 12 and 13 are formed by applying a resin solvent to the super fiber layer 11. That is, the super fiber layer 11 is coated with a resin solvent. Therefore, the resin solvent layers 12 and 13 may be referred to as resin coating layers. The resin solvent constituting the resin solvent layers 12 and 13 may contain super engineering plastics. Examples of super engineering plastics include polyamideimide, polyimide, polyphenylene sulfide, polysulfone, polyphenylene sulfone, polyether sulfone, polyarylate, polyetherimide, polyetheretherketone, polyetherketone, polyetherketoneketone, polytetrafluoroethylene, perfluoroalkoxy alkane polymer, and liquid crystal polymer.

[0016] (Manufacturing method of the film body 10) The manufacturing method of the film body 10 will be described with reference to the flowchart of FIG. 3. The manufacturing method of the film body 10 includes a weaving process (step S101), a scouring process (step S102), and a resin processing process (step S103). Note that FIG. 3 is a flowchart showing the main part of the manufacturing method 10 of the film body 10. Therefore, one or more other processes may exist before the weaving process. Similarly, one or more other processes may exist after the resin processing process.

[0017] In the weaving process of step S101, the super fiber layer 11 is formed using super fiber yarns. As described above, the super fiber layer 11 may be a woven fabric or a knitted fabric using super fiber yarns. Alternatively, the super fiber layer 11 may be formed by restraining at least two super fiber yarns with at least one of sewing thread and molten thread. Note that the super fiber yarns may or may not be finer yarns.

[0018] In the scouring process of step S102, the super fiber layer 11 formed in the weaving process is subjected to a degreasing treatment. The degreasing treatment may be appropriately selected according to the super fibers used in the weaving process. Note that since various existing modes can be applied to the degreasing treatment, the detailed description thereof is omitted.

[0019] In the resin processing step of step S103, a resin solvent is applied to the surface of the super fiber layer 11 from which the sizing agent has been washed (i.e., degreased) in the refining step. The resin solvent layer 12 and 13 are formed by the resin solvent applied to the surface of the super fiber layer 11.

[0020]

[0019] In the resin processing step, before the resin solvent is applied to the surface of the super fiber layer 11, at least one of a hydrophilization treatment and an undercoat treatment may be performed on the super fiber layer 11. That is, the resin processing step may include at least one of a hydrophilization treatment step and an undercoat treatment step, and a step of applying a resin solvent. Since various existing modes can be applied to the hydrophilization treatment and the undercoat treatment, the description thereof will be omitted. Note that the undercoat treatment may be referred to as a pretreatment.

[0021] Note that the manufacturing method of the film body 10 may not include one of the refining step and the hydrophilization treatment step. That is, either the degreasing treatment or the hydrophilization treatment may not be performed on the super fiber layer 11.

[0022] (Usage example of the film body 10) The above-described film body 10 may be used, for example, in the inflatable kite 1 shown in FIG. 4. The inflatable kite 1 may be used, for example, in a tethered wind power generation system. For example, the inflatable tube 1a of the inflatable kite 1 is manufactured by adhering the film body 10 with an adhesive or sewing the film body 10 with a thread.

[0023] For example, the inside of the inflatable tube 1a may be filled with air. At this time, the internal pressure of the inflatable tube 1a becomes higher than the atmospheric pressure. As a result, a relatively strong force is applied to at least one of the bonding portion and the sewing portion of the inflatable tube 1a. Therefore, the film body 10 is required to have, for example, relatively high creep resistance and slip-off resistance. In addition, the inflatable kite 1 may fall. When the inflatable kite 1 falls, the film body 10 is required to have relatively high puncture strength so that the inflatable kite 1 does not break.

[0024] (Evaluation of the film body 10) The evaluation results of the test pieces of the film body 10 (hereinafter, appropriately referred to as "Examples") manufactured by the above-described manufacturing method will be described. The film body 10 as an example includes a super fiber layer 11 as a fabric using super fiber yarns. The resin solvent layers 12 and 13 contain polyamideimide. The mass of the film body 10 as an example is 45 to 55 g / m 2 is. Note that the mass of the film body 10 as an example takes into account the variations in the masses of a plurality of examples.

[0025] The film body 210 as Comparative Example 1 and the film body 220 as Comparative Example 2 to be compared with the film body 10 will be described with reference to FIG. 5. In FIG. 5(a), the film body 210 includes a fiber layer 211 formed by laminating one layer composed of a plurality of yarns extending in one direction and another layer composed of a plurality of yarns extending in another direction different from the one direction, and resin film layers 212 and 213 sandwiching the fiber layer 211. Note that the fiber layer 211 is formed using super fiber yarns. The resin film layers 212 and 213 contain PET (polyethylene terephthalate). The mass of the film body 210 as Comparative Example 1 is 73 g / m 2 is.

[0026] In Fig. 5(b), the film body 220 includes a fiber layer 221 as a fabric woven using a thread extending in one direction and a thread extending in another direction different from the one direction, and resin film layers 222 and 223 sandwiching the fiber layer 221. Note that the fiber layer 221 is formed using threads of super fiber. The resin film layers 222 and 223 contain PET. The mass of the film body 210 as Comparative Example 2 is 82 g / m 2 is.

[0027] (1) Creep test As shown in Fig. 6, a creep test was performed in which two test pieces adhered with an adhesive were pulled in the direction of the arrow with a load of 800 N. The distance (length) in the longitudinal direction of the test piece after adhesion is 200 mm, and the distance (width) in the short transverse direction is 30 mm.

[0028] An example of the results of the creep test is shown in Fig. 7. The film body 210 as Comparative Example 1 stretched by about 15 mm and broke in about 8.7 hours. The film body 220 as Comparative Example 2 stretched by about 40 mm and broke in about 35 hours. In contrast, the film body 10 as an Example stretched by about 45 mm and broke in about 110 hours. From this, it can be said that the film body 10 has higher creep resistance than the film bodies 210 and 220.

[0029] (2) Sewing slippage test As shown in Fig. 8, a sewing slippage test was performed in which two test pieces sewn with a thread were pulled in a direction (see the arrow) intersecting the direction in which the sewing thread penetrates the two test pieces. An example of the results of the sewing slippage test is shown in Fig. 9. Note that when the thickness of the film body increases or the amount of fibers constituting the film body increases, the strength of the film body increases and the mass of the film body increases. The sewing strength shown in Fig. 9 is the value obtained by dividing the strength measured in the test by the mass per square meter (g / m 2 ) of the film body. That is, the sewing strength shown in Fig. 9 indicates the strength per unit mass.

[0030] From the results of the film body 10 as Example 1 and the results of the film body 10 as Example 2, it can be said that when the tensile stroke of the film body 10 is 7.5 to 12.5 mm, the sewing strength is 30 to 44 N / gsm. Comparing the maximum values of the sewing strengths of the film body 10 as an example, the film body 210 as Comparative Example 1, and the film body 220 as Comparative Example 2, it can be said that the film body 10 has a strength about three times that of the film body 210, and the film body 10 has a strength about 1.7 times that of the film body 220. From this, it can be said that the film body 10 has a higher slippage resistance than the film bodies 210 and 220. Note that the sewing strength may also be referred to as a tensile load. Note that the unit [gsm] means [g / m 2 .

[0031] (3) Tear test As shown in FIG. 10, a tear test was performed in which two test pieces sewn with a thread were pulled in the direction in which the sewing thread penetrates the two test pieces (see the arrow). An example of the results of the tear test is shown in FIG. 11. The sewing tear strength shown in FIG. 11 is, similar to the sewing strength shown in FIG. 9, the strength measured in the test divided by the mass per square meter (g / m 2 ) of the film body. That is, the sewing tear strength shown in FIG. 11 indicates the strength per unit mass.

[0032] From the results of the film body 10 as Example 1 and the results of the film body 10 as Example 2, it can be said that when the tensile stroke of the film body 10 is 3 to 6 mm, the sewing tear strength is 20 to 35 N / gsm. Comparing the maximum values of the sewing tear strengths of the film body 10 as an example, the film body 210 as Comparative Example 1, and the film body 220 as Comparative Example 2, it can be said that the film body 10 has a strength about 2.5 times that of the film bodies 210 and 220. Note that the sewing tear strength may also be referred to as a tensile load.

[0033] (4) Puncture test A puncture test was performed in which a pin with a diameter of 1 mm was punctured into the test piece at a speed of 20 inch / min. An example of the results of the puncture test is shown in FIG. 12. The puncture strength shown in FIG. 12 is, similar to the sewing strength shown in FIG. 9, the strength measured in the test divided by the mass per square meter (g / m 2It is the value divided by . That is, the piercing strength shown in Fig. 12 indicates the strength per unit mass.

[0034] From the results related to the film body 10 as Example 1, the results related to the film body 10 as Example 2, the results related to the film body 10 as Example 3, and the results related to the film body 10 as Example 4, it can be said that when the piercing stroke of the film body 10 is 2 - 3 mm, the piercing strength is 0.6 - 0.8 N / gsm. The average value of the piercing strength of the film body 10 as an example is 0.73 N / gsm. The average value of the piercing strength of the film body 210 as Comparative Example 1 is 0.44 N / gsm. From this, it can be said that the film body 10 has a higher piercing strength than the film body 210. Incidentally, the piercing strength may be referred to as the piercing load.

[0035] (5) Fiber pull - out test A fiber pull - out test was conducted in which a test piece with one end adhered to metal (for example, stainless steel) was pulled in the longitudinal direction of the test piece with a load of 130 N. Here, when the test piece is destroyed with breakage, cracks occur in the resin layer (for example, resin solvent layers 12 and 13), and the resin layer and the fiber layer (for example, super fiber layer 11) peel off or fiber pull - out of the broken fibers occurs. The fiber pull - out test is a test for measuring the time until fiber pull - out of the broken fibers occurs. For the film body 10 as an example, no fiber pull - out occurred even after 10 hours from the start of the test.

[0036] (6) Tensile strength measurement Tensile strength measurements were made for a plurality of film bodies 10 as examples. In the tensile strength measurement, each test piece was measured three times, and the average value was taken as the tensile strength. The measurement results are shown below. Incidentally, the tensile strength indicates the strength per unit width.

[0037]

Table 1

[0038] Here, the variation in the three measurement results for each test piece was from +6.4% to -3.9%. Considering the variation, it can be said that the tensile strength of the film body 10 as an example is 51 to 64 N / mm. The tensile strength of the film body 210 as Comparative Example 1 is 44.6 N / mm, and the tensile strength of the film body 220 as Comparative Example 2 is 50.0 N / mm.

[0039] As described above, when the thickness of the film body increases or the amount of fibers constituting the film body increases, the strength of the film body increases and the mass of the film body also increases. Therefore, a film body with a relatively heavy mass has a relatively high strength. Thus, considering the mass of the film body, the tensile strengths of the film body 10 as an example, the film body 210 as Comparative Example 1, and the film body 220 as Comparative Example 2 are compared.

[0040] As described above, the mass of the film body 10 as an example is 45 to 55 g / m 2 . The mass of the film body 210 as Comparative Example 1 is 73 g / m 2 . The mass of the film body 210 as Comparative Example 2 is 82 g / m 2 . Considering the mass, it can be said that the tensile strength of the film body as an example is about twice as high as the tensile strengths of the film body 210 as Comparative Example 1 and the film body 220 as Comparative Example 2.

[0041] An additional explanation will be given with reference to FIG. 13 showing the relationship between the mass and the tensile strength of the film body. In FIG. 13, the tensile strength considering the mass of the film body is represented by the slopes of the solid line, the broken line, and the dotted line shown in FIG. 13. As is clear from the solid line and the broken line shown in FIG. 13, the film body 10 as an example has a lighter mass and a higher tensile strength than the film body 210 as Comparative Example 1 and the film body 220 as Comparative Example 2. That is, it can be said that the film body 10 is a light and strong film body.

[0042] For example, when the fiber density of the super fiber layer 11 of the film body 10 is increased, the mass of the film body 10 increases and the tensile strength of the film body 10 also increases. On the other hand, when the fiber density of the super fiber layer 11 is decreased, the mass of the film body 10 decreases and the tensile strength of the film body 10 also decreases. In such a case, the mass and the tensile strength of the film body 10 change along the solid line shown in FIG. 13. Therefore, the film body 10 is not limited to a film body having a tensile strength of 51 to 64 N / mm and a mass of 45 to 55 g / m 2 is not limited to.

[0043] (Technical effect) Super fibers have a relatively low affinity for water. For this reason, if a resin solvent is applied to the super fiber layer 11 without taking any measures, the adhesion strength between the super fiber layer 11 and the resin solvent will become relatively low. In contrast, in the present embodiment, at least one of a degreasing treatment and a hydrophilization treatment is performed on the super fiber layer 11. Therefore, according to the present embodiment, the adhesion strength between the super fiber layer 11 and the resin solvent can be increased. As a result, peeling between the super fiber layer 11 and the resin is suppressed, so that the strength of the film body 10 can be increased. That is, according to the present embodiment, a high-strength film body 10 can be provided.

[0044] When applying a resin solvent to the super fiber layer 11, the contact area between the surface of the super fiber layer 11 and the resin can be increased compared to the case where the super fiber layer 11 is sandwiched between resin films. That is, according to the present embodiment, the adhesion strength between the surface of the super fiber layer 11 and the resin can be increased compared to the case where the super fiber layer 11 is sandwiched between resin films. As a result, peeling between the super fiber layer 11 and the resin is suppressed, so that the strength of the film body 10 can be increased.

[0045] The relative positional relationship between the yarns constituting the super fiber layer 11 is less likely to fluctuate due to the resin solvent. For example, the occurrence of fiber displacement of the super fiber layer 11 due to sewing yarns can be suppressed. Therefore, according to the present embodiment, the sewing strength of the film body 10 can be increased.

[0046] The super fiber layer 11 may be a woven or knitted fabric of super fiber yarns. Alternatively, the super fiber layer 11 may be formed by restraining a plurality of fiber layers with at least one of sewing thread and molten yarn. With this configuration, the relative positional relationship between the yarns constituting the super fiber layer 11 is less likely to vary. Also in this case, for example, the sewing strength of the membrane body 10 can be increased.

[0047] As described above, the membrane body 10 has relatively high creep resistance, slip resistance, and puncture strength, for example. Therefore, it can be said that the membrane body 10 is suitable as a material for the inflatable kite 1. In particular, the membrane body 10 is lighter than other membrane bodies (for example, membrane bodies 210 and 220) having the same strength. Therefore, if the inflatable kite 1 is manufactured using the membrane body 10, it is possible to achieve both high strength and weight reduction of the inflatable kite 1.

[0048] Aspects of the invention derived from the embodiments described above will be described below.

[0049] A membrane body according to one aspect of the invention is a membrane body including a super fiber layer formed using super fibers, and a resin solvent layer formed in contact with the super fiber layer and sandwiching the super fiber layer, wherein the super fiber layer has been subjected to at least one of degreasing treatment and hydrophilization treatment.

[0050] In the membrane body, the resin solvent constituting the resin solvent layer may be applied to the super fiber layer. Here, the resin solvent may contain super engineering plastics.

[0051] In the film body, the super fiber layer may have at least two yarns including the super fibers, one yarn extending in a first direction, one yarn extending in a second direction different from the first direction, and one yarn extending in a third direction different from the first and second directions. The at least two yarns may be intertwined with each other so that fluctuations in the relative positions of the at least two yarns are suppressed, or the at least two yarns may be constrained by at least one of a sewing thread and a molten thread.

[0052] Alternatively, in the film body, the super fiber layer may include the super fibers and have a plurality of yarns extending in one direction. The two adjacent yarns among the plurality of yarns may be intertwined with each other so that fluctuations in the relative positions of the two yarns are suppressed.

[0053] The film body may have a tensile strength of 51 to 64 N / mm and a mass of 45 to 55 g / m 2 and may be.

[0054] The present invention is not limited to the above-described embodiments, and can be appropriately modified without departing from the gist or idea of the invention read from the claims and the entire specification, and a film body with such modifications is also included in the technical scope of the present invention.

Explanation of Reference Numerals

[0055] 10... film body, 11... super fiber layer, 12, 13... resin solvent layer

Claims

1. A film body comprising a super fiber layer composed of super fibers and a resin solvent layer that is in contact with the super fiber layer and is formed so as to sandwich the super fiber layer, wherein at least one of a degreasing treatment and a hydrophilization treatment is performed on the super fiber layer. The film body is characterized by this.

2. The resin solvent constituting the resin solvent layer is applied to the super fiber layer. The film body according to claim 1, characterized by this.

3. The resin solvent contains super engineering plastic. The film body according to claim 2, characterized by this.

4. The super fiber layer has at least two yarns including the super fibers, one yarn extending in a first direction, one yarn extending in a second direction different from the first direction, and one yarn extending in a third direction different from the first direction and the second direction, wherein the at least two yarns are intertwined with each other or the at least two yarns are constrained by at least one of a sewing thread and a fused yarn so that fluctuations in the relative positions of the at least two yarns are suppressed. The film body according to claim 1, characterized by this.

5. The super fiber layer includes the super fibers and has a plurality of yarns extending in one direction, wherein two adjacent yarns among the plurality of yarns are intertwined with each other so that fluctuations in the relative positions of the two yarns are suppressed. The film body according to claim 1, characterized by this.

6. The tensile strength is 51 to 64 N / mm, and the mass is 45 to 55 g / m ２ is The film body according to any one of claims 1 to 5, characterized by this.

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