WO2011070679A1 - Porous net material and method for producing same - Google Patents

Porous net material and method for producing same Download PDF

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Publication number
WO2011070679A1
WO2011070679A1 PCT/JP2009/070771 JP2009070771W WO2011070679A1 WO 2011070679 A1 WO2011070679 A1 WO 2011070679A1 JP 2009070771 W JP2009070771 W JP 2009070771W WO 2011070679 A1 WO2011070679 A1 WO 2011070679A1
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WO
WIPO (PCT)
Prior art keywords
melt adhesive
adhesive film
hot
base material
hot melt
Prior art date
Application number
PCT/JP2009/070771
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French (fr)
Japanese (ja)
Inventor
利通 原田
Original Assignee
ソニーケミカル＆インフォメーションデバイス株式会社
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Application filed by ソニーケミカル＆インフォメーションデバイス株式会社 filed Critical ソニーケミカル＆インフォメーションデバイス株式会社
Priority to JP2011545037A priority Critical patent/JP5536801B2/en
Priority to PCT/JP2009/070771 priority patent/WO2011070679A1/en
Priority to KR1020127013334A priority patent/KR101636598B1/en
Priority to TW099142986A priority patent/TWI517977B/en
Publication of WO2011070679A1 publication Critical patent/WO2011070679A1/en

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/21—Paper; Textile fabrics
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2400/00—Presence of inorganic and organic materials
    • C09J2400/20—Presence of organic materials
    • C09J2400/26—Presence of textile or fabric
    • C09J2400/263—Presence of textile or fabric in the substrate

Definitions

  • the present invention relates to a porous net material having fine through holes and a method for manufacturing the same.
  • the polyester mesh material is used for the purpose of improving the reinforceability and balancing the blindfolding ability to blind the speaker body with the sound omission ability to efficiently emit the sound output from the speaker body to the outside.
  • a perforated net material has been proposed in which a rubber-based liquid adhesive diluted with a solvent is applied and bonded to a punching sheet.
  • a perforated net material is applied to a punching sheet.
  • the workability is poor, the adhesiveness to the punching sheet is weak, and the adhesive strength varies greatly.
  • the hot melt adhesive film contains a foaming agent, and foaming occurs at an unexpected location. Therefore, there is a problem that a regular mesh-like film is not formed and a desired through hole may not be formed.
  • the present invention has been made in view of such problems, and the object of the present invention is to obtain a regular mesh-like film without using a hot melt adhesive containing a foaming agent.
  • An object of the present invention is to provide a permeable net material having a through hole.
  • the inventor of the present application obtains a regular mesh-like film by laminating a hot-melt adhesive film made of a hot-melt adhesive containing no foaming agent on a base material having pores, thereby obtaining a desired mesh film.
  • the inventors have found that a permeable net material having through holes can be provided, and have completed the present invention.
  • a permeable thermal adhesive sheet in which a hot-melt adhesive film made from a hot-melt adhesive that does not contain a foaming agent is laminated on one side of a base material having fine through-holes. It is formed in a lattice shape, and the hot melt adhesive film has through holes formed by bridging the adhesive raw material so as to cross the through holes of the base material. Net material.
  • the holes of the hot melt adhesive film are also effective when the adhesive raw material is bridged so as to cross the holes of the base material to form a rhombus shape.
  • the base material is a plain weave of a predetermined yarn material
  • the hot-melt adhesive film has the adhesive raw material from the top of the base material of the plain weave to the direction of extending the yarn material.
  • the through hole of the hot melt adhesive film is a thread material that extends in a horizontal direction with respect to a direction in which the hot melt adhesive film is applied to the base material among the thread materials constituting the base material.
  • the hot melt adhesive film is also effective when the hot melt adhesive having a softening temperature of 50 ° C. to 65 ° C. is used as a raw material.
  • the said hot-melt-adhesive film is effective also when it uses as a raw material the hot-melt-adhesive whose melt viscosity in 150 degreeC environment is 200 Pa.s or less.
  • the base material is also effective when the through holes are formed so that the numerical aperture per inch is 50 to 100.
  • the base material is also effective when it is made of a thread material having a thickness of 95 ⁇ m or less.
  • the thread material is also effective when it is made of black.
  • the present invention relates to a porous property comprising a porous thermal adhesive sheet in which a hot melt adhesive film made of a hot melt adhesive containing no foaming agent is laminated on one side of a substrate having fine through holes.
  • a method for producing a net material wherein the hot melt adhesive film having a predetermined melt viscosity is heated in a state in which a pair of rollers constituting a nip roll portion through which the base material passes is set to room temperature.
  • a step of applying, and a coated product in which the hot melt adhesive film is coated on the base material is dried at a predetermined temperature by a predetermined drying device. It is a manufacturing method of the through hole of net member and a degree.
  • the hot melt adhesive film is also effective when the hot melt adhesive having a softening temperature of 50 ° C. to 65 ° C. is used as a raw material.
  • the said hot-melt-adhesive film is effective also when it uses as a raw material the hot-melt-adhesive whose melt viscosity in 150 degreeC environment is 200 Pa.s or less.
  • the base material is also effective when the through holes are formed so that the numerical aperture per inch is 50 to 100.
  • the substrate is also effective when it is made of a thread material having a thickness of 95 ⁇ m or less.
  • the thread material is also effective when it is made of black.
  • the hot melt adhesive film is supplied and supplied to the nip roll portion so that the outflow temperature thereof is 110 ° C. to 120 ° C., and the rollers constituting the nip roll portion have a temperature of 17 ° C. to 19 ° C. This is also effective when the cooling water is set with temperature-set cooling water.
  • one of the rollers constituting the nip roll portion is a predetermined rubber roller, and the other roller is also effective when it is a predetermined metal roller.
  • the present invention is also effective when the surface of the metal roller is coated with a fluororesin.
  • the hot melt adhesive film has the adhesive raw material crossing the through holes of the base material. Since a regular mesh-shaped through-hole is formed by being bridged, a perforated net material having a desired through-hole can be provided.
  • the permeable net material since the opening part of the hole of a base material and the opening part of the hole of a hot melt adhesive film do not correspond, it becomes different in the present invention.
  • the blinding property and the sound omission property are determined according to the opening ratio of the base material and the opening ratio of the hot melt adhesive film. That is, the permeable net material according to the present invention can adjust the overall opening ratio by changing the opening ratio of the hot melt adhesive film while using a base material having a unique opening ratio. It has a blinding property and a sound omission property according to the overall aperture ratio.
  • the aperture ratio can be finely adjusted only by using the base material having a unique aperture ratio without using the base material having various aperture ratios. As a result, it is possible to finely adjust the blinding and sound omission according to the required specifications. Further, in the method for producing a porous net material according to the present invention, a hot melt adhesive that does not contain a foaming agent is used, and the adhesive raw material is bridged so as to cross the through hole of the base material.
  • a hot-melt adhesive film in which regular and network-like pores are formed can be laminated to one side of the substrate, so a porous net material can be produced, so the softening temperature and melting of the hot-melt adhesive film By controlling the viscosity, the line width and amount of the adhesive can be adjusted and the aperture ratio can be changed.
  • a base material with a unique opening ratio is used without using a base material with various opening ratios. As a result, it is possible to finely adjust the aperture ratio, and as a result, it is possible to finely adjust the blinding and sound omission according to the required specifications.
  • FIG. 3 is a view for explaining the configuration of a permeable net material using hot melt adhesive films having different physical properties.
  • B It is a figure explaining the structure of the permeable net material shown as embodiment of this invention, and was used for the permeable net material shown to Fig.6 (a) (b) and Fig.7 (a). It is a figure explaining the structure of the permeable net material using the hot-melt-adhesive film of a physical property different from a hot-melt-adhesive film. It is a figure explaining the result of having calculated
  • the blind paper that conceals the cone paper covering the speaker main body 1 to make it difficult for dust and moisture to enter inside, and the sound output from the speaker main body 1 is efficient.
  • the perforated net member 10 is disposed on the front surface 1a of the speaker main body 1 together with the metal punching sheet 2 in order to achieve a balance with the sound omission property that is often emitted to the outside.
  • the permeable net material 10 is made of a permeable thermal adhesive sheet obtained by laminating a base material having fine permeable holes such as nylon ridges and a hot melt adhesive film.
  • the base material is made of, for example, a woven or non-woven fabric of synthetic fibers such as nylon, polyester, rayon, urethane, or a woven or non-woven fabric of thin felt, saran, cotton, hemp or the like.
  • the yarn material 3 is formed by weaving in a lattice shape (plain weave).
  • the weaving method of the thread material 3 is not particularly limited, but from the viewpoint of obtaining a hot melt adhesive film having a regular mesh-like through hole, in addition to plain weave, twill weave, satin weave Can be adopted.
  • One thread material 3 is composed of a thread-like member formed by twisting one thread material element or a plurality of thread material elements, and the surface is coated with melanin resin or the like as necessary. Formed.
  • the thickness of one thread material 3 is normally 95 ⁇ m or less.
  • the thread material 3 is made of black from the viewpoint of improving the above-described blinding property.
  • the size of the through holes 4 formed by forming the thread material 3 in a lattice shape is not particularly limited, but it is desirable that both the major axis and the minor axis are 100 ⁇ m to 2 mm.
  • the size of the through-hole 4 is less than 100 ⁇ m, the above-described sound loss is deteriorated, and when the size of the through-hole 4 exceeds 2 mm, the dustproof effect is impaired.
  • the numerical aperture per inch (one inch is about 2.54 cm) of the substrate is 50 to 100. When the numerical aperture is less than 50, the sound loss is deteriorated. When the numerical aperture exceeds 100, the dustproof effect is impaired.
  • the hot melt adhesive film has a structure in which a plurality of through-holes are formed on one side of a substrate with a thickness of about 20 ⁇ m to 60 ⁇ m. These through-holes are not shaped along the grid-like through-holes in the base material by controlling the softening temperature, melt viscosity, and amount of the base material of the hot-melt adhesive, for example, as shown in FIG.
  • the adhesive raw material of the hot-melt adhesive film is preferably formed into a regular rhombus shape or parallelogram shape by being bridged so as to cross the through holes 4 of the base material.
  • the hot melt adhesive film is such that the adhesive raw material of the hot melt adhesive film is inclined with respect to the extending direction of the yarn material 3 from the top of the plain weave base material. It is more preferable that a substantially rhombic through hole is formed by bridging to the top of the adjacent base material (hereinafter, this portion is referred to as “bridge portion 5”).
  • the hot melt adhesive used for such a hot melt adhesive film one not containing a foaming agent is used.
  • foaming agent included in a hot melt adhesive, foaming occurs at an unexpected location, so that a regular mesh-like film is not formed, and as a result, the adhesive raw material is not bridged across the substrate through-holes. For this reason, a desired through hole may not be formed.
  • the hot melt adhesive used in the present invention one having a softening temperature of 50 ° C. to 65 ° C. can be suitably used, and a more preferable softening temperature is 50 ° C. to 60 ° C.
  • the “softening temperature” refers to the Vicat softening temperature. Further, the Vicat softening temperature is measured by “Shimadzu Flow Tester CFT-100C” manufactured by Shimadzu Corporation.
  • the softening temperature is less than 50 ° C., problems such as blocking occur when the adhesive raw material is re-melted by other processing heat such as aging to form a roll. Further, if the softening temperature exceeds 65 ° C., the fluidity is impaired due to cooling of the hot melt adhesive film in the manufacturing process described later, and it becomes difficult to form through holes. Since a high temperature is required for bonding to a certain punching sheet 2, there arises a problem that the punching sheet 2 is thermally deformed.
  • the melt viscosity at 150 ° C. is 200 Pa ⁇ s or less. Is more desirable. However, if the melt viscosity is too low, the adhesive raw material tends to flow and clogging may occur.
  • an ethylene / vinyl acetate copolymer for example, an ethylene / vinyl acetate copolymer, polyethylene, ethylene / acrylate copolymer, copolymer nylon, polyamide resin, butyral resin, polyester resin, polymethyl methacrylate resin, etc.
  • those made of an ethylene / vinyl acetate copolymer can be particularly preferably used from the viewpoint of adhesion to a base material such as nylon and ease of adjustment of melt viscosity.
  • Polyvinyl chloride and adhesives containing polyvinyl chloride plasticizers and stabilizers may be used for the purpose of thinning when hot-melt adhesive films are laminated.
  • a tackifier antioxidant, a coloring agent, etc.
  • a hot-melt-adhesive As the tackifier, terpene / phenol resin, terpene resin, pinene resin, rosin, rosin derivatives such as hydrogenated rosin and hydrogenated rosin ester, and the like can be used.
  • the tackifier is not particularly limited, but when a hot melt adhesive comprising the ethylene / vinyl acetate copolymer is used, it is compatible with the ethylene / vinyl acetate copolymer. From the viewpoint of good solubility and the ability to further improve the adhesion to the substrate, it is preferable to use a terpene / phenol resin.
  • Antioxidants include 2,5-di-t-butylhydroquinone, 2,5-di-t-amylhydroquinone, 2,2′-methylene-bis (4-methyl-6-t-butylphenol), 4,4′-thiobis (6-t-butyl-m-cresol), 2,2′-ethylene-bis (4-ethyl-6-t-butylphenol) and the like can be used. Further, although not particularly limited, it is desirable to use a black colorant from the viewpoint of improving the above-described blinding property.
  • the base material and the hot melt adhesive film are laminated so that the adhesive raw material is placed around the yarn material of the base material.
  • the wrap around and the overall thickness is determined. For example, when the thickness of the base material is 95 ⁇ m and the hot melt adhesive film having a thickness of 30 ⁇ m to 40 ⁇ m is laminated and laminated, the total thickness of the porous net material 10 is 100 ⁇ m to 105 ⁇ m. It is formed. And the permeable net
  • the shape of the through hole of the hot melt adhesive film laminated on the base material is as shown in FIGS. More preferably, the bridge portion 5 is formed so as to extend from the top portion of the plain-woven base material to the top portion of the base material adjacent to the direction in which the yarn material 3 extends in an oblique direction so as to cross. Therefore, the opening portion of the through hole 4 of the base material and the opening portion of the through hole of the hot melt adhesive film do not coincide with each other and are different. Therefore, in the permeable net material 10, the above-described blinding property and sound omission property are determined according to the opening ratio of the base material and the opening ratio of the hot melt adhesive film.
  • the aperture ratio of the base material is uniquely determined by the material selection of the base material.
  • the aperture ratio of the hot melt adhesive film can be arbitrarily changed depending on the line width and amount of the bridge portion 5 that forms the through hole. And the line
  • the overall aperture ratio can be adjusted by changing the aperture ratio of the hot melt adhesive film while using a base material having a unique aperture ratio.
  • the aperture ratio is controlled in a range of about 25% to 55% as a whole. can do. This is equivalent to the case where a substrate having a numerical aperture per inch of 250 to 100 is used.
  • the aperture ratio can be finely adjusted only by using the base material with a unique aperture ratio without using the base material with various aperture ratios. Subtle adjustment of blinding and sound omission according to the required specifications can be performed.
  • the permeable net material 10 can be manufactured by a manufacturing apparatus 20 as shown in FIG.
  • the hot melt adhesive film F the adhesive raw material is put into a predetermined extruder 21 and melt kneaded, and the melt is about 30 ⁇ m to 40 ⁇ m, for example, through a T die 22 set at a predetermined temperature. It is formed by allowing it to flow out in layers with a thickness of.
  • the set temperature of the T die 22 is such that the outflow temperature of the hot melt adhesive film F flowing out through the T die 22 is about 110 ° C. to 120 ° C., which is higher than the softening temperature described above. It is set to about 140 ° C to 180 ° C.
  • the manufacturing apparatus 20 may apply an inflation molding method instead of the T die molding method using the T die 22.
  • the hot melt adhesive film F that has flowed out in layers reaches the nip roll portion 24 through which the long base material B fed out from the unwinding portion 23 with a predetermined tension passes.
  • One roller 24a constituting the nip roll portion 24 is made of a highly heat-resistant rubber roller such as silicone rubber, and the other roller 24b has a fluororesin such as poly-4 tetrafluoroethylene resin on its surface, For example, it is made of a metal roller such as chromium coated with Teflon (registered trademark).
  • the nip roll portion 24 is applied while the hot melt adhesive film F is uniformly pushed onto one surface of the base material B by being driven to rotate while the pair of rollers 24 a and 24 b are in contact with each other at a predetermined pressure.
  • the nip roll portion 24 is not heated, but is cooled by cooling water set at a normal temperature of 17 ° C. to 19 ° C. so that the hot melt adhesive film F does not adhere to the rollers 24a and 24b. That is, the hot melt adhesive film F that flows out at a temperature of about 110 ° C. to 120 ° C. is cooled as it passes through the nip roll portion 24.
  • the pressure by the nip roll part 24 is set so that the whole thickness in the state by which the hot-melt-adhesive film F was apply
  • the coated material in which the hot melt adhesive film F is applied to the base material B is carried into a drying device 25 such as an oven or a dryer and dried at a predetermined temperature.
  • the base material B, the hot melt adhesive film F, Is laminated to produce the permeable net material 10.
  • the through holes of the hot melt adhesive film F are formed by this process.
  • the through-hole is formed by hot-melt adhesion to the base material B among the yarn materials constituting the plain-woven base material B, as shown in FIGS. 6 (a), 6 (b) and 7 (a), (b).
  • the thread material extending in the horizontal direction with respect to the application direction of the agent film F is formed in a region located on the application surface side of the hot melt adhesive film F in the base material B.
  • the hot melt adhesive film F is in the direction in which the hot melt adhesive film F is applied to the base material B in the region where the thread materials extending in the horizontal direction and the vertical direction constituting the base material B intersect.
  • the thread material extending in the horizontal direction remains as it is on the base material B in the vicinity of the region located on the surface side of the base material B opposite to the surface to which the hot melt adhesive film F is applied.
  • the bridge portion 5 is formed so as to extend from the top portion to the top portion of the base material that is adjacent to the base material B in the oblique direction with respect to the direction in which the yarn material of the base material B extends.
  • a diamond-shaped opening is formed.
  • 6 (a) (b) and 7 (a) (b) are pores manufactured by applying hot-melt adhesive film F having different physical properties to base material B having the same specifications.
  • a specific example of the net member 10 is shown.
  • the permeable net material 10 is also hot when the hot melt adhesive film F having different physical properties is used.
  • the shape of the through holes of the melt adhesive film F is formed into a substantially rhombus shape by bridging the adhesive raw material so as to cross the through holes of the base material B.
  • the manufacturing apparatus 20 mentioned above winds up the elongate permeable net material 10 in which such a through-hole was formed by the winding-up part 26, and complete
  • the long permeable net member 10 taken up by the take-up unit 26 is cut into a predetermined size according to the size of the punching sheet 2 that is an adherend and used.
  • the porous net material 10 described above can finely adjust the overall aperture ratio by changing the aperture ratio of the hot-melt adhesive film F while using the base material B having a unique aperture ratio. As a result, it is possible to finely adjust the blinding and sound omission according to the required specifications. Therefore, the permeable net material 10 is expected to reduce the manufacturing cost as compared with the case of preparing a base material having various opening ratios and adjusting the opening ratio.
  • this porous net material 10 uses the hot-melt adhesive film F uniformly laminated by the nip roll part 24, the porous net material bonded to a punching sheet using a conventional liquid adhesive Compared to the above, there is an advantage that workability at the time of bonding to the punching sheet 2 is good, adhesion to the punching sheet 2 is strong, and variation in adhesive strength is small.
  • the present invention is not limited to the embodiment described above.
  • the net material used for the speaker has been described.
  • the present invention can also be applied to a cabinet device of other audio equipment such as a microphone, and includes an air conditioner. It can also be applied to various filters.
  • the inventor of the present application produced a permeable net material using the hot melt adhesive film having the physical properties shown in Table 1 below, and was blinded. The sound omission and visible light transmittance were evaluated.
  • a plain weave base material with a numerical aperture per inch of 70 (aperture ratio 65%) was applied to a softening temperature of 60 ° C. and 150 ° C.
  • a laminate of a hot melt adhesive film having a melt viscosity of 150 Pa ⁇ s and containing no foaming agent was prepared.
  • a permeable net material of Comparative Example 1 a plain weave base material having a numerical aperture per inch of 70 (aperture ratio 65%) has a softening temperature of 60 ° C. and a melt viscosity in an environment of 150 ° C. What laminated
  • a plain weave base material having a numerical aperture per inch of 70 (opening ratio 65%) has a softening temperature of 70 ° C. and a melt viscosity in an environment of 150 ° C.
  • permeability of visible light was measured as a parameter
  • the visible light transmittance was measured using a “visible light transmittance / reflectometer HA-TR” manufactured by Suga Test Instruments Co., Ltd.
  • the visible light transmittance of the porous net material produced as Example 1 was 45%, and the characteristics of 40% or more, which is the required specification for ordinary products, were obtained.
  • the adhesive force obtained by peeling the porous net material of Example 1 bonded to a punching sheet made of polystyrene at a pulling speed of 300 mm / min using a 180 ° peeling machine was 14 N / 2 cm, which was hot. It is equivalent to the adhesive strength of a porous net material containing a foaming agent in the melt adhesive, and is much larger than the adhesive strength of 6N / 2cm of the porous net material bonded to the punching sheet using a liquid adhesive. Good results were obtained.
  • the porous net material produced as Comparative Example 1 has a melt viscosity higher than that of Example 1, so that sufficient pores are not formed, and the visible light transmittance is 15%.
  • the permeable net material produced as Comparative Example 2 has almost no through holes due to its higher softening temperature than that of Example 1, and visible light rays. It was observed that the transmittance was greatly reduced to 5%.
  • the change in melt viscosity with respect to the heating temperature of the hot melt adhesive film was determined. Specifically, a hot melt adhesive film of Example 2 having a softening temperature of 61.7 ° C. was prepared. For comparison with Example 2, the hot melt adhesive film of Comparative Example 3 having a softening temperature of 88.4 ° C. and the hot melt adhesive film of Comparative Example 4 having a softening temperature of 52 ° C. Were prepared as Comparative Example 5 hot melt adhesive films having a softening temperature of 85.3 ° C., respectively. These hot melt adhesive films as Comparative Examples 3 to 5 have physical properties in which no through holes are formed. And when these hot-melt-adhesive adhesive films were heated and melt viscosity in each temperature was calculated
  • the softening temperature of the hot melt adhesive film of Comparative Example 5 is that of Example 2. Since it was higher than that, a result that sufficient through holes were not formed was obtained. From this, it can be seen that even if the physical properties are controlled so that the melt viscosity curves are matched, an appropriate hot melt adhesive film cannot be obtained, and the combination of the softening temperature and the melt viscosity is important. Furthermore, in order to compare the characteristics depending on the weaving method of the base material, a porous net material was produced using the base material of the weaving method shown in Table 2, and the blinding property and the sound omission property were evaluated.
  • the permeable net material of Example 4 which laminated the hot-melt-adhesive film which does not contain was produced, and each blinding property and sound loss property were evaluated.
  • the speaker when the punching sheet, the translucent net and the speaker main body are bonded together and viewed from the punching sheet side, the speaker is not visible, and on the other hand, the speaker is visible. Those that could not be recognized until ⁇ were marked as ⁇ . On the other hand, the sound loss was evaluated by the visible light transmittance. In this case, since the hot melt adhesive used contained carbon particles, the visible light transmittance was 34% when no through-holes were formed.
  • the porous net material of Example 1 using a plain weave base material has good blindfolding because the holes of the hot melt adhesive film are formed in a rhombus shape,
  • a transparent net material having a visible light transmittance of 45% and a good balance between blinding and sound omission was obtained.
  • the porous net materials of Example 3 and Example 4 using a twill weave base material have visible light transmittances of 52% and 58%, respectively, and sound leakage is better than that of Example 1.
  • the shape of the through holes was a parallelogram, and the blinding property was slightly inferior to that of Example 1.
  • it was the permeable net material of Example 3 and Example 4 what was satisfactory in practical use was obtained.

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  • Organic Chemistry (AREA)
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  • Adhesives Or Adhesive Processes (AREA)

Abstract

Provided is a porous net material having desired through-holes that is obtained by producing a regular-shaped mesh type film without using a hot-melt adhesive containing a foaming agent. The porous net material comprises a porous heat bonding sheet wherein a hot-melt adhesive film, which is produced from a hot-melt adhesive free from a foaming agent, is laminated on one face of a base material having fine through-holes. The through-holes of the base material are formed by plain weaving a yarn material. In the hot-melt adhesive film, a bridging part (5) formed of said adhesive material extends obliquely, relative to the stretching direction of the yarn material, from a top of the plain woven base material to the adjacent top of the base material so as to form through-holes (4) each having a rhomboidal shape.

Description

透孔性ネット材及びその製造方法Permeable net material and method for producing the same
　本発明は、微細な透孔を有する透孔性ネット材及びその製造方法に関する。 The present invention relates to a porous net material having fine through holes and a method for manufacturing the same.
　近年、テレビジョン装置の大型画面化に伴い、音響特性も改善することを目的としてスピーカの大型化も進んでいる。従来から、各種スピーカには、外気に含まれる塵埃や湿気の侵入を防止するために、多数の透孔が設けられた金属製のパンチングシートが配設されている。近年では、かかるパンチングシートは、高級感を出すために光沢性（透明性）が高く、コストを低減するために薄型化が進む傾向にある。 In recent years, with the increase in the screen size of television devices, the size of speakers has been increasing for the purpose of improving acoustic characteristics. Conventionally, various speakers are provided with a metal punching sheet provided with a large number of through holes in order to prevent intrusion of dust and moisture contained in the outside air. In recent years, such punching sheets have high gloss (transparency) in order to give a high-class feeling, and tend to be thinned in order to reduce costs.
　また、補強性を向上させるとともに、スピーカ本体を目隠しする目隠し性と、スピーカ本体から出力される音を効率良く外部に放音させる音抜け性との均衡を図ることを目的として、ポリエステルメッシュ材にゴム系の液状接着剤を溶剤で薄めたものを塗布し、これをパンチングシートに貼り合せた透孔性ネット材が提案されているが、かかる透孔性ネット材は、パンチングシートに貼り合わせる際の作業性が悪く、また、パンチングシートに対する接着性が弱く、接着強度のバラツキも多いという問題がある。 In addition, the polyester mesh material is used for the purpose of improving the reinforceability and balancing the blindfolding ability to blind the speaker body with the sound omission ability to efficiently emit the sound output from the speaker body to the outside. A perforated net material has been proposed in which a rubber-based liquid adhesive diluted with a solvent is applied and bonded to a punching sheet. However, such a perforated net material is applied to a punching sheet. There are problems that the workability is poor, the adhesiveness to the punching sheet is weak, and the adhesive strength varies greatly.
　これに対して、透孔を有する基材と、発泡剤を含有するホットメルト接着剤フィルムとをラミネートして透孔性ネット材を製造する技術が提案されている（例えば、特許文献１等参照）。 On the other hand, a technique for manufacturing a permeable net material by laminating a base material having a through hole and a hot melt adhesive film containing a foaming agent has been proposed (see, for example, Patent Document 1). ).
特開昭５９－１４５２７３号公報JP 59-145273 A
　しかし、透孔を有する基材とホットメルト接着剤フィルムとをラミネートした透孔性ネット材にあっては、ホットメルト接着剤フィルムが発泡剤を含有しており、予想外の箇所で発泡が生ずるため定形の網目状のフィルムが形成されず、所望の透孔が形成されないおそれがあるという問題があった。 However, in the case of a porous net material obtained by laminating a substrate having a hole and a hot melt adhesive film, the hot melt adhesive film contains a foaming agent, and foaming occurs at an unexpected location. Therefore, there is a problem that a regular mesh-like film is not formed and a desired through hole may not be formed.
　本発明は、このような課題に鑑みてなされたもので、その目的とするところは、発泡剤を含有するホットメルト接着剤を用いることなく、定形の網目状のフィルムが得られ、これにより所望の透孔を有する透孔性ネット材を提供することにある。 The present invention has been made in view of such problems, and the object of the present invention is to obtain a regular mesh-like film without using a hot melt adhesive containing a foaming agent. An object of the present invention is to provide a permeable net material having a through hole.
　本願発明者は、透孔を有する基材に、発泡剤を含有しないホットメルト接着剤を原料とするホットメルト接着剤フィルムをラミネートすることによって定形の網目状のフィルムが得られ、これにより所望の透孔を有する透孔性ネット材を提供することができることを見出し、本発明を完成させるに至った。 The inventor of the present application obtains a regular mesh-like film by laminating a hot-melt adhesive film made of a hot-melt adhesive containing no foaming agent on a base material having pores, thereby obtaining a desired mesh film. The inventors have found that a permeable net material having through holes can be provided, and have completed the present invention.
　微細な透孔を有する基材の片面に、発泡剤を含有しないホットメルト接着剤を原料とするホットメルト接着剤フィルムをラミネートした透孔性熱接着シートからなり、上記基材の透孔は、格子状に形成されたものであり、上記ホットメルト接着剤フィルムには、当該接着剤原料が上記基材の透孔を横切るように橋架けされることによって透孔が形成されている透孔性ネット材である。
　本発明では、上記ホットメルト接着剤フィルムの透孔は、上記基材の透孔を横切るように上記接着剤原料が橋架けされることによって菱形形状とされている場合にも効果的である。
　本発明では、上記基材は、所定の糸材が平織りされたものであり、上記ホットメルト接着剤フィルムは、当該接着剤原料が、上記平織りの基材の頂部から上記糸材の延材方向に対して斜め方向に隣接する基材の頂部へ橋架けされることによってそれぞれ菱形形状の透孔が形成されている場合にも効果的である。
　本発明では、上記ホットメルト接着剤フィルムの透孔は、上記基材を構成する糸材のうち、当該基材に対する当該ホットメルト接着剤フィルムの塗布方向に対して水平方向に延在する糸材が、当該基材における当該ホットメルト接着剤フィルムの塗布面側に位置する領域に形成されている場合にも効果的である。
　本発明では、上記ホットメルト接着剤フィルムは、軟化温度が５０℃～６５℃のホットメルト接着剤を原料としたものである場合にも効果的である。
　本発明では、上記ホットメルト接着剤フィルムは、１５０℃環境下での溶融粘度が２００Ｐａ・ｓ以下のホットメルト接着剤を原料としたものである場合にも効果的である。
　本発明では、上記基材は、１インチあたりの開口数が５０～１００となるように透孔が形成されたものである場合にも効果的である。
　本発明では、上記基材は、９５μｍ以下の太さからなる糸材からなる場合にも効果的である。
　本発明では、上記糸材は、黒色からなるものである場合にも効果的である。
　一方、本発明は、微細な透孔を有する基材の片面に、発泡剤を含有しないホットメルト接着剤を原料とするホットメルト接着剤フィルムをラミネートした透孔性熱接着シートからなる透孔性ネット材の製造方法であって、上記基材が通過するニップロール部を構成する一対のローラを常温に温度設定した状態で、所定の溶融粘度からなる上記ホットメルト接着剤フィルムの溶融物を当該ホットメルト接着剤フィルムの軟化温度よりも高い温度で層状に流出させて上記ニップロール部に供給する工程と、上記ニップロール部を駆動させて上記基材の片面に上記ホットメルト接着剤フィルムを均一に押し込みながら塗布する工程と、上記基材に上記ホットメルト接着剤フィルムが塗布された塗布物を、所定の乾燥装置によって所定温度で乾燥する工程とを備える透孔性ネット材の製造方法である。
　本発明では、上記ホットメルト接着剤フィルムは、軟化温度が５０℃～６５℃のホットメルト接着剤を原料としたものである場合にも効果的である。
　本発明では、上記ホットメルト接着剤フィルムは、１５０℃環境下での溶融粘度が２００Ｐａ・ｓ以下のホットメルト接着剤を原料としたものである場合にも効果的である。
　本発明では、上記基材は、１インチあたりの開口数が５０～１００となるように透孔が形成されたものである場合にも効果的である。
　本発明では、上記基材は、９５μｍ以下の太さからなる糸材からなるものである場合にも効果的である。
　本発明では、上記糸材は、黒色からなるものである場合にも効果的である。
　本発明では、上記ホットメルト接着剤フィルムは、その流出温度が１１０℃～１２０℃となるように上記ニップロール部に流出供給され、上記ニップロール部を構成するローラは、１７℃～１９℃の温度に温度設定された冷却水によって冷却されている場合にも効果的である。
　本発明では、上記ニップロール部を構成する一方のローラは、所定のゴム製ローラであり、他方のローラは、所定の金属製ローラである場合にも効果的である。
　本発明では、上記金属製ローラの表面には、フッ素樹脂がコーティングされている場合にも効果的である。 It consists of a permeable thermal adhesive sheet in which a hot-melt adhesive film made from a hot-melt adhesive that does not contain a foaming agent is laminated on one side of a base material having fine through-holes. It is formed in a lattice shape, and the hot melt adhesive film has through holes formed by bridging the adhesive raw material so as to cross the through holes of the base material. Net material.
In the present invention, the holes of the hot melt adhesive film are also effective when the adhesive raw material is bridged so as to cross the holes of the base material to form a rhombus shape.
In the present invention, the base material is a plain weave of a predetermined yarn material, and the hot-melt adhesive film has the adhesive raw material from the top of the base material of the plain weave to the direction of extending the yarn material. However, it is also effective when the rhomboid-shaped through holes are formed by being bridged to the tops of the base materials adjacent to each other in an oblique direction.
In the present invention, the through hole of the hot melt adhesive film is a thread material that extends in a horizontal direction with respect to a direction in which the hot melt adhesive film is applied to the base material among the thread materials constituting the base material. However, it is also effective when it is formed in a region located on the application surface side of the hot melt adhesive film in the substrate.
In the present invention, the hot melt adhesive film is also effective when the hot melt adhesive having a softening temperature of 50 ° C. to 65 ° C. is used as a raw material.
In this invention, the said hot-melt-adhesive film is effective also when it uses as a raw material the hot-melt-adhesive whose melt viscosity in 150 degreeC environment is 200 Pa.s or less.
In the present invention, the base material is also effective when the through holes are formed so that the numerical aperture per inch is 50 to 100.
In the present invention, the base material is also effective when it is made of a thread material having a thickness of 95 μm or less.
In the present invention, the thread material is also effective when it is made of black.
On the other hand, the present invention relates to a porous property comprising a porous thermal adhesive sheet in which a hot melt adhesive film made of a hot melt adhesive containing no foaming agent is laminated on one side of a substrate having fine through holes. A method for producing a net material, wherein the hot melt adhesive film having a predetermined melt viscosity is heated in a state in which a pair of rollers constituting a nip roll portion through which the base material passes is set to room temperature. A step of supplying the nip roll part in a layered manner at a temperature higher than the softening temperature of the melt adhesive film, and driving the nip roll part to uniformly push the hot melt adhesive film onto one side of the substrate. A step of applying, and a coated product in which the hot melt adhesive film is coated on the base material is dried at a predetermined temperature by a predetermined drying device. It is a manufacturing method of the through hole of net member and a degree.
In the present invention, the hot melt adhesive film is also effective when the hot melt adhesive having a softening temperature of 50 ° C. to 65 ° C. is used as a raw material.
In this invention, the said hot-melt-adhesive film is effective also when it uses as a raw material the hot-melt-adhesive whose melt viscosity in 150 degreeC environment is 200 Pa.s or less.
In the present invention, the base material is also effective when the through holes are formed so that the numerical aperture per inch is 50 to 100.
In the present invention, the substrate is also effective when it is made of a thread material having a thickness of 95 μm or less.
In the present invention, the thread material is also effective when it is made of black.
In the present invention, the hot melt adhesive film is supplied and supplied to the nip roll portion so that the outflow temperature thereof is 110 ° C. to 120 ° C., and the rollers constituting the nip roll portion have a temperature of 17 ° C. to 19 ° C. This is also effective when the cooling water is set with temperature-set cooling water.
In the present invention, one of the rollers constituting the nip roll portion is a predetermined rubber roller, and the other roller is also effective when it is a predetermined metal roller.
The present invention is also effective when the surface of the metal roller is coated with a fluororesin.
　本発明の透孔性ネット材にあっては、微細な透孔を有する基材の片面に、発泡剤を含有しないホットメルト接着剤を原料とするホットメルト接着剤フィルムをラミネートした透孔性熱接着シートからなり、基材の透孔は、例えば平織り状の格子状に形成されたものであり、上記ホットメルト接着剤フィルムには、当該接着剤原料が上記基材の透孔を横切るように橋架けされることによって定形の網目状の透孔が形成されていることから、所望の透孔を有する透孔性ネット材を提供することができる。
　そして、このような透孔性ネット材によれば、基材の透孔の開口部分と、ホットメルト接着剤フィルムの透孔の開口部分とが一致せずに異なるものとなるため、本発明にかかる透孔性ネット材においては、基材の開口率と、ホットメルト接着剤フィルムの開口率とに応じて、目隠し性や音抜け性が決定されることになる。すなわち、本発明にかかる透孔性ネット材は、一意の開口率の基材を用いながらも、ホットメルト接着剤フィルムの開口率を変化させることにより、全体の開口率を調整することができ、その全体の開口率に応じた目隠し性や音抜け性を有するものとなる。
　したがって、本発明にかかる透孔性ネット材においては、様々な開口率の基材を用いることなく、一意の開口率の基材を用いるのみで、開口率の微調整を行うことができ、結果として、要求仕様に応じた目隠し性や音抜け性の微妙な調整を行うことができる。
　また、本発明にかかる透孔性ネット材の製造方にあっては、発泡剤を含有しないホットメルト接着剤を用い、当該接着剤原料が基材の透孔を横切るように橋架けされることによって定形で網目状の透孔が形成されたホットメルト接着剤フィルムが、基材の片面にラミネートされた透孔性ネット材を製造することができるため、ホットメルト接着剤フィルムの軟化温度や溶融粘度を制御することにより、接着剤の線幅や量を調整し、開口率を変化させることができる。そして、このような本発明にかかる透孔性ネット材の製造方法によって製造された透孔性ネット材においては、様々な開口率の基材を用いることなく、一意の開口率の基材を用いるのみで、開口率の微調整を行うことができ、結果として、要求仕様に応じた目隠し性や音抜け性の微妙な調整を行うことができる。 In the permeable net material of the present invention, the permeable heat obtained by laminating a hot-melt adhesive film made of a hot-melt adhesive containing no foaming agent on one side of a substrate having fine pores. It is made of an adhesive sheet, and the through holes of the base material are formed in, for example, a plain weave lattice pattern. The hot melt adhesive film has the adhesive raw material crossing the through holes of the base material. Since a regular mesh-shaped through-hole is formed by being bridged, a perforated net material having a desired through-hole can be provided.
And according to such a permeable net material, since the opening part of the hole of a base material and the opening part of the hole of a hot melt adhesive film do not correspond, it becomes different in the present invention. In such a permeable net material, the blinding property and the sound omission property are determined according to the opening ratio of the base material and the opening ratio of the hot melt adhesive film. That is, the permeable net material according to the present invention can adjust the overall opening ratio by changing the opening ratio of the hot melt adhesive film while using a base material having a unique opening ratio. It has a blinding property and a sound omission property according to the overall aperture ratio.
Therefore, in the permeable net material according to the present invention, the aperture ratio can be finely adjusted only by using the base material having a unique aperture ratio without using the base material having various aperture ratios. As a result, it is possible to finely adjust the blinding and sound omission according to the required specifications.
Further, in the method for producing a porous net material according to the present invention, a hot melt adhesive that does not contain a foaming agent is used, and the adhesive raw material is bridged so as to cross the through hole of the base material. Because a hot-melt adhesive film in which regular and network-like pores are formed can be laminated to one side of the substrate, a porous net material can be produced, so the softening temperature and melting of the hot-melt adhesive film By controlling the viscosity, the line width and amount of the adhesive can be adjusted and the aperture ratio can be changed. And in the permeable net material manufactured by the manufacturing method of such a permeable net material concerning this invention, a base material with a unique opening ratio is used without using a base material with various opening ratios. As a result, it is possible to finely adjust the aperture ratio, and as a result, it is possible to finely adjust the blinding and sound omission according to the required specifications.
本発明の実施の形態として示す透孔性ネット材を使用したスピーカの構成を説明する斜視図である。It is a perspective view explaining the structure of the speaker using the permeable net material shown as embodiment of this invention. 本発明の実施の形態として示す透孔性ネット材に用いられる基材の具体例を説明する図である。It is a figure explaining the specific example of the base material used for the porous net material shown as embodiment of this invention. 本発明の実施の形態として示す透孔性ネット材の構成を説明する図であり、図２に示す基材にホットメルト接着剤フィルムをラミネートした状態を説明する図である。It is a figure explaining the structure of the porous net material shown as embodiment of this invention, and is a figure explaining the state which laminated the hot-melt-adhesive film on the base material shown in FIG. １インチあたりの開口数と開口率との関係を説明する図である。It is a figure explaining the relationship between the numerical aperture per inch and an aperture ratio. 本発明の実施の形態として示す透孔性ネット材を製造する製造装置の構成を説明する図である。It is a figure explaining the structure of the manufacturing apparatus which manufactures the permeable net material shown as embodiment of this invention. （ａ）：本発明の実施の形態として示す透孔性ネット材の構成を説明する図であり、所定の物性のホットメルト接着剤フィルムを用いた透孔性ネット材の構成を説明する図である。（ｂ）：本発明の実施の形態として示す透孔性ネット材の構成を説明する図であり、図６（ａ）に示す透孔性ネット材に用いたホットメルト接着剤フィルムとは異なる物性のホットメルト接着剤フィルムを用いた透孔性ネット材の構成を説明する図である。(A): It is a figure explaining the structure of the permeable net material shown as embodiment of this invention, and is a figure explaining the structure of the permeable net material using the hot-melt-adhesive film of a predetermined | prescribed physical property. is there. (B): It is a figure explaining the structure of the porous net material shown as embodiment of this invention, and the physical property different from the hot-melt-adhesive film used for the porous net material shown to Fig.6 (a) It is a figure explaining the structure of the permeable net material using the hot-melt-adhesive film of this. （ａ）：本発明の実施の形態として示す透孔性ネット材の構成を説明する図であり、図６（ａ）（ｂ）に示す透孔性ネット材に用いたホットメルト接着剤フィルムとは異なる物性のホットメルト接着剤フィルムを用いた透孔性ネット材の構成を説明する図である。（ｂ）：本発明の実施の形態として示す透孔性ネット材の構成を説明する図であり、図６（ａ）（ｂ）及び図７（ａ）に示す透孔性ネット材に用いたホットメルト接着剤フィルムとは異なる物性のホットメルト接着剤フィルムを用いた透孔性ネット材の構成を説明する図である。(A): It is a figure explaining the structure of the permeable net material shown as embodiment of this invention, and the hot-melt-adhesive film used for the permeable net material shown to FIG. 6 (a) (b) FIG. 3 is a view for explaining the configuration of a permeable net material using hot melt adhesive films having different physical properties. (B): It is a figure explaining the structure of the permeable net material shown as embodiment of this invention, and was used for the permeable net material shown to Fig.6 (a) (b) and Fig.7 (a). It is a figure explaining the structure of the permeable net material using the hot-melt-adhesive film of a physical property different from a hot-melt-adhesive film. ホットメルト接着剤フィルムの加熱温度に対する溶融粘度の変化を求めた結果を説明する図である。It is a figure explaining the result of having calculated | required the change of the melt viscosity with respect to the heating temperature of a hot-melt-adhesive film.
　１　スピーカ本体
　２　パンチングシート
　３　糸材
　４　透孔
　５　橋架け部
　１０　透孔性ネット材
　２０　製造装置
　２１　押出機
　２２　Ｔダイ
　２３　巻き出し部
　２４　ニップロール部
　２４ａ，２４ｂ　ローラ
　２５　乾燥装置
　２６　巻き取り部
　Ｂ　基材
　Ｆ　ホットメルト接着剤フィルム  DESCRIPTION OF SYMBOLS 1 Speaker main body 2 Punching sheet 3 Thread material 4 Through-hole 5 Bridge part 10 Permeable net material 20 Manufacturing apparatus 21 Extruder 22 T die 23 Unwinding part 24 Nip- roll part 24a, 24b Roller 25 Drying apparatus 26 Winding part B Base material F Hot melt adhesive film
　以下、本発明を適用した具体的な実施の形態について図面を参照しながら詳細に説明する。 Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.
　本実施の形態は、例えば図１に示すように、スピーカ本体１を被覆するコーン紙を目隠しして内部に塵埃や湿気を侵入させにくくする目隠し性と、スピーカ本体１から出力される音を効率よく外部に放音させる音抜け性との均衡を図るために、スピーカ本体１の前面１ａに金属製のパンチングシート２とともに配設される透孔性ネット材１０である。 In the present embodiment, for example, as shown in FIG. 1, the blind paper that conceals the cone paper covering the speaker main body 1 to make it difficult for dust and moisture to enter inside, and the sound output from the speaker main body 1 is efficient. The perforated net member 10 is disposed on the front surface 1a of the speaker main body 1 together with the metal punching sheet 2 in order to achieve a balance with the sound omission property that is often emitted to the outside.
　透孔性ネット材１０は、ナイロン紗等の微細な透孔を有する基材と、ホットメルト接着剤フィルムとをラミネートした透孔性熱接着シートからなる。 The permeable net material 10 is made of a permeable thermal adhesive sheet obtained by laminating a base material having fine permeable holes such as nylon ridges and a hot melt adhesive film.
　基材は、例えば図２に示すように、例えば、ナイロン、ポリエステル、レーヨン、ウレタン等の合成繊維の織布又は不織布や、薄いフェルト、サラン、木綿、麻等の織布又は不織布を素材とする糸材３を例えば格子状に織る（平織り）ことによって構成される。
　本発明の場合、糸材３の織り方は特に限定されることはないが、定形の網目状の透孔を有するホットメルト接着剤フィルムを得る観点からは、平織りの他、綾織り、朱子織りを採用することができる。
　これらのうちでも、目隠し性と音抜け性のバランスの良い透孔性ネット材を得る観点からは、平織りの基材を用いることがより好ましい。 For example, as shown in FIG. 2, the base material is made of, for example, a woven or non-woven fabric of synthetic fibers such as nylon, polyester, rayon, urethane, or a woven or non-woven fabric of thin felt, saran, cotton, hemp or the like. For example, the yarn material 3 is formed by weaving in a lattice shape (plain weave).
In the case of the present invention, the weaving method of the thread material 3 is not particularly limited, but from the viewpoint of obtaining a hot melt adhesive film having a regular mesh-like through hole, in addition to plain weave, twill weave, satin weave Can be adopted.
Among these, it is more preferable to use a plain weave base material from the viewpoint of obtaining a porous net material having a good balance between blindfolding and sound loss.
　１本の糸材３は、１本の糸材エレメント又は複数本の糸材エレメントを捩って１本に形成した糸状の部材からなり、必要に応じて、その表面をメラニン樹脂等によってコーティングして形成される。
　１本の糸材３の太さは、通常、９５μｍ以下とされる。本発明の場合、特に限定されることはないが、上述した目隠し性を高める観点からは、糸材３は黒色からなるのが望ましい。
　また、かかる糸材３を格子状にすることによって形成される透孔４の大きさは、特に限定されることはないが、長径及び短径ともに１００μｍ～２ｍｍであるのが望ましい。透孔４の大きさが１００μｍ未満である場合には、上述した音抜け性の悪化を招来し、透孔４の大きさが２ｍｍを超えると、防塵効果が損なわれることになる。さらに、特に限定されることはないが、基材の１インチ（１インチは約２．５４ｃｍ）あたりの開口数は、５０～１００であるのが望ましい。開口数が５０未満である場合には、音抜け性の悪化を招来し、開口数が１００を超えると、防塵効果が損なわれることになる。 One thread material 3 is composed of a thread-like member formed by twisting one thread material element or a plurality of thread material elements, and the surface is coated with melanin resin or the like as necessary. Formed.
The thickness of one thread material 3 is normally 95 μm or less. In the case of the present invention, although not particularly limited, it is desirable that the thread material 3 is made of black from the viewpoint of improving the above-described blinding property.
Further, the size of the through holes 4 formed by forming the thread material 3 in a lattice shape is not particularly limited, but it is desirable that both the major axis and the minor axis are 100 μm to 2 mm. When the size of the through-hole 4 is less than 100 μm, the above-described sound loss is deteriorated, and when the size of the through-hole 4 exceeds 2 mm, the dustproof effect is impaired. Further, although not particularly limited, it is desirable that the numerical aperture per inch (one inch is about 2.54 cm) of the substrate is 50 to 100. When the numerical aperture is less than 50, the sound loss is deteriorated. When the numerical aperture exceeds 100, the dustproof effect is impaired.
　一方、ホットメルト接着剤フィルムは、基材の片面に２０μｍ～６０μｍ程度の厚みで塗布されて複数の透孔が形成された構造とされる。これらの透孔は、ホットメルト接着剤の軟化温度、溶融粘度、基材に対する量を制御することにより、基材における格子状の透孔に沿った形状ではなく、例えば図３に示すように、ホットメルト接着剤フィルムの接着剤原料が基材の透孔４を横切るように橋架けされることによってそれぞれ定形である菱形形状又は平行四辺形形状に形成されていることが好ましい。
　ここで、ホットメルト接着剤フィルムは、例えば図３に示すように、ホットメルト接着剤フィルムの接着剤原料が、平織りの基材の頂部から当該糸材３の延材方向に対して斜め方向に隣接する基材の頂部へ橋架けされることによってそれぞれ略菱形状の透孔が形成されている（以下、当該部分を「橋架け部５」という。）ことがより好ましい。 On the other hand, the hot melt adhesive film has a structure in which a plurality of through-holes are formed on one side of a substrate with a thickness of about 20 μm to 60 μm. These through-holes are not shaped along the grid-like through-holes in the base material by controlling the softening temperature, melt viscosity, and amount of the base material of the hot-melt adhesive, for example, as shown in FIG. The adhesive raw material of the hot-melt adhesive film is preferably formed into a regular rhombus shape or parallelogram shape by being bridged so as to cross the through holes 4 of the base material.
Here, for example, as shown in FIG. 3, the hot melt adhesive film is such that the adhesive raw material of the hot melt adhesive film is inclined with respect to the extending direction of the yarn material 3 from the top of the plain weave base material. It is more preferable that a substantially rhombic through hole is formed by bridging to the top of the adjacent base material (hereinafter, this portion is referred to as “bridge portion 5”).
　かかるホットメルト接着剤フィルムに用いられるホットメルト接着剤としては、発泡剤を含有しないものが使用される。
　ホットメルト接着剤に発泡剤含まれると、予想外の箇所で発泡が生ずるため定形の網目状のフィルムが形成されず、その結果、接着剤原料が基材の透孔を横切るように橋架けされないため、所望の透孔が形成されないおそれがある。
　また、本発明に用いるホットメルト接着剤としては、軟化温度が５０℃～６５℃のものを好適に用いることができ、より好ましい軟化温度は、５０℃～６０℃である。 As the hot melt adhesive used for such a hot melt adhesive film, one not containing a foaming agent is used.
When a foaming agent is included in a hot melt adhesive, foaming occurs at an unexpected location, so that a regular mesh-like film is not formed, and as a result, the adhesive raw material is not bridged across the substrate through-holes. For this reason, a desired through hole may not be formed.
As the hot melt adhesive used in the present invention, one having a softening temperature of 50 ° C. to 65 ° C. can be suitably used, and a more preferable softening temperature is 50 ° C. to 60 ° C.
　本明細書においては、「軟化温度」とは、ビカット軟化温度のことをいう。また、ビカット軟化温度は、島津製作所社製の「島津フローテスター　ＣＦＴ－１００Ｃ」によって測定したものを用いる。
　軟化温度が５０℃未満である場合には、エージング等の他の加工熱によって接着剤原料が再溶融し、巻物にした際にブロッキングが生じる等の問題が生じる。また、軟化温度が６５℃を超えると、後述する製造工程にてホットメルト接着剤フィルムを冷却することに起因して流動性が損なわれて透孔が形成されにくくなる上に、被接着体であるパンチングシート２に貼り合わせる際に高温を要することから当該パンチングシート２が熱変形してしまうという問題が生じる。さらに、ホットメルト接着剤としては、その溶融粘度が高すぎると、フィルムの形成能が低下して生産性の低下を招来することから、１５０℃環境下での溶融粘度が２００Ｐａ・ｓ以下のものがより望ましい。ただし、溶融粘度が低すぎると、接着剤原料が流れやすくなり、目詰まりを生じたりすることがある。 In this specification, the “softening temperature” refers to the Vicat softening temperature. Further, the Vicat softening temperature is measured by “Shimadzu Flow Tester CFT-100C” manufactured by Shimadzu Corporation.
When the softening temperature is less than 50 ° C., problems such as blocking occur when the adhesive raw material is re-melted by other processing heat such as aging to form a roll. Further, if the softening temperature exceeds 65 ° C., the fluidity is impaired due to cooling of the hot melt adhesive film in the manufacturing process described later, and it becomes difficult to form through holes. Since a high temperature is required for bonding to a certain punching sheet 2, there arises a problem that the punching sheet 2 is thermally deformed. Further, as the hot melt adhesive, if the melt viscosity is too high, the film forming ability is lowered and the productivity is lowered. Therefore, the melt viscosity at 150 ° C. is 200 Pa · s or less. Is more desirable. However, if the melt viscosity is too low, the adhesive raw material tends to flow and clogging may occur.
　なお、ホットメルト接着剤としては、例えば、エチレン・酢酸ビニル共重合体、ポリエチレン、エチレン・アクリレート共重合体、共重合ナイロン、ポリアミド樹脂、ブチラール樹脂、ポリエステル樹脂、ポリメチルメタクリレート樹脂等からなるものを用いることができる。
　これらのうち、ナイロン等の基材との密着性や溶融粘度の調整のし易さの観点からは、エチレン・酢酸ビニル共重合体からなるものを特に好適に用いることができる。
　また、ホットメルト接着剤フィルムのラミネート時に薄く伸ばすことを目的として、ポリ塩化ビニルや、ポリ塩化ビニルの可塑剤や安定剤を配合した接着剤を用いることがあるが、かかるポリ塩化ビニルは、不適切な処分を行うと有害物質を排出するという問題があり、ポリ塩化ビニルの可塑剤や安定剤には、フタル酸エステル等が含まれていることから、環境や人体への影響を考慮する必要がある。そのため、ホットメルト接着剤としては、これらポリ塩化ビニルや、ポリ塩化ビニルの可塑剤や安定剤を配合しないものを用いるのが望ましい。 As the hot melt adhesive, for example, an ethylene / vinyl acetate copolymer, polyethylene, ethylene / acrylate copolymer, copolymer nylon, polyamide resin, butyral resin, polyester resin, polymethyl methacrylate resin, etc. Can be used.
Among these, those made of an ethylene / vinyl acetate copolymer can be particularly preferably used from the viewpoint of adhesion to a base material such as nylon and ease of adjustment of melt viscosity.
Polyvinyl chloride and adhesives containing polyvinyl chloride plasticizers and stabilizers may be used for the purpose of thinning when hot-melt adhesive films are laminated. There is a problem in that hazardous substances are released when properly disposed, and the plasticizers and stabilizers of polyvinyl chloride contain phthalates, etc., so it is necessary to consider the impact on the environment and the human body. There is. For this reason, it is desirable to use a hot-melt adhesive that does not contain these polyvinyl chlorides, or plasticizers or stabilizers of polyvinyl chloride.
　さらに、ホットメルト接着剤には、必要に応じて、粘着付与剤、酸化防止剤、着色剤等を添加してもよい。粘着付与剤としては、テルペン・フエノール樹脂、テルペン樹脂、ピネン樹脂、ロジン、水添ロジンや水添ロジンエステル等のロジン誘導体等を用いることができる。
　ここで、粘着付与剤としては、特に限定されることはないが、ホットメルト接着剤として、上記エチレン・酢酸ビニル共重合体からなるものを用いた場合に、エチレン・酢酸ビニル共重合体と相溶性が良好で、基材との密着性を更に向上させることができる観点からは、テルペン・フエノール樹脂を用いることが好ましい。
　また、酸化防止剤としては、２，５－ジ－ｔ－ブチルハイドロキノン、２，５－ジ－ｔ－アミルハイドロキノン、２，２’－メチレン－ビス（４－メチル－６－ｔ－ブチルフェノール）、４，４’－チオビス（６－ｔ－ブチル－ｍ－クレゾール）、２，２’－エチレン－ビス（４－エチル－６－ｔ－ブチルフェノール）等を用いることができる。さらに、特に限定されることはないが、上述した目隠し性を高める観点からは、黒色の着色剤を用いるのが望ましい。 Furthermore, you may add a tackifier, antioxidant, a coloring agent, etc. to a hot-melt-adhesive as needed. As the tackifier, terpene / phenol resin, terpene resin, pinene resin, rosin, rosin derivatives such as hydrogenated rosin and hydrogenated rosin ester, and the like can be used.
Here, the tackifier is not particularly limited, but when a hot melt adhesive comprising the ethylene / vinyl acetate copolymer is used, it is compatible with the ethylene / vinyl acetate copolymer. From the viewpoint of good solubility and the ability to further improve the adhesion to the substrate, it is preferable to use a terpene / phenol resin.
Antioxidants include 2,5-di-t-butylhydroquinone, 2,5-di-t-amylhydroquinone, 2,2′-methylene-bis (4-methyl-6-t-butylphenol), 4,4′-thiobis (6-t-butyl-m-cresol), 2,2′-ethylene-bis (4-ethyl-6-t-butylphenol) and the like can be used. Further, although not particularly limited, it is desirable to use a black colorant from the viewpoint of improving the above-described blinding property.
　このような基材とホットメルト接着剤フィルムとからなる透孔性ネット材１０においては、基材とホットメルト接着剤フィルムとをラミネートすることにより、接着剤原料が基材の糸材の周囲に回り込み、全体の厚みが決定される。例えば、透孔性ネット材１０においては、基材の厚みが９５μｍの場合において、３０μｍ～４０μｍの厚みのホットメルト接着剤フィルムを積層してラミネートした場合には、全体として１００μｍ～１０５μｍの厚みに形成される。そして、透孔性ネット材１０は、ホットメルト接着剤フィルム側をパンチングシート２に接触させた状態で加熱することにより、パンチングシート２に貼り合わされて使用される。 In the permeable net material 10 composed of such a base material and a hot melt adhesive film, the base material and the hot melt adhesive film are laminated so that the adhesive raw material is placed around the yarn material of the base material. The wrap around and the overall thickness is determined. For example, when the thickness of the base material is 95 μm and the hot melt adhesive film having a thickness of 30 μm to 40 μm is laminated and laminated, the total thickness of the porous net material 10 is 100 μm to 105 μm. It is formed. And the permeable net | network material 10 is bonded together and used for the punching sheet 2 by heating in the state which made the hot-melt-adhesive film side contact the punching sheet 2. FIG.
　本発明の透孔性ネット材１０の場合、基材にラミネートされたホットメルト接着剤フィルムの透孔の形状は、図２及び図３に示すように、それぞれ当該基材の各透孔４を横切るように、より好ましくは、平織りの基材の頂部から当該糸材３の延材方向に対して斜め方向に隣接する基材の頂部へ延在するように橋架け部５が形成されることによって略菱形形状とされ、当該基材の透孔４の開口部分と、当該ホットメルト接着剤フィルムの透孔の開口部分とが一致せずに異なるものとなる。そのため、透孔性ネット材１０においては、基材の開口率と、ホットメルト接着剤フィルムの開口率とに応じて、上述した目隠し性や音抜け性が決定されることになる。 In the case of the permeable net material 10 of the present invention, the shape of the through hole of the hot melt adhesive film laminated on the base material is as shown in FIGS. More preferably, the bridge portion 5 is formed so as to extend from the top portion of the plain-woven base material to the top portion of the base material adjacent to the direction in which the yarn material 3 extends in an oblique direction so as to cross. Therefore, the opening portion of the through hole 4 of the base material and the opening portion of the through hole of the hot melt adhesive film do not coincide with each other and are different. Therefore, in the permeable net material 10, the above-described blinding property and sound omission property are determined according to the opening ratio of the base material and the opening ratio of the hot melt adhesive film.
　ここで、基材の開口率は、当該基材の素材選定によって一意に決定される。例えば１インチあたりの開口数が７０,１００，１５０，１６０，１８０，２００，２５０となるように太さ７０μｍの糸材を格子状に平織りして構成された基材の開口率は、それぞれ、図４に示すように、６５％，６０％，４９％，４６％，４１％，３６％，２４％と一意であり、１インチあたりの開口数と開口率との間には線形の関係がある。これに対して、ホットメルト接着剤フィルムの開口率は、透孔を形成する橋架け部５の線幅や量によって任意に変化させることができる。そして、この橋架け部５の線幅や量は、当該ホットメルト接着剤の軟化温度、溶融粘度、基材に対する量を制御することにより、調整することができる。 Here, the aperture ratio of the base material is uniquely determined by the material selection of the base material. For example, the aperture ratio of a base material configured by plain weaving of a 70 μm thick thread material so that the numerical aperture per inch is 70, 100, 150, 160, 180, 200, 250, respectively, As shown in FIG. 4, 65%, 60%, 49%, 46%, 41%, 36%, and 24% are unique, and there is a linear relationship between the numerical aperture per inch and the numerical aperture. is there. On the other hand, the aperture ratio of the hot melt adhesive film can be arbitrarily changed depending on the line width and amount of the bridge portion 5 that forms the through hole. And the line | wire width and quantity of this bridge part 5 can be adjusted by controlling the softening temperature of the said hot-melt-adhesive, melt viscosity, and the quantity with respect to a base material.
　したがって、透孔性ネット材１０においては、一意の開口率の基材を用いながらも、ホットメルト接着剤フィルムの開口率を変化させることにより、全体の開口率を調整することができる。透孔性ネット材１０においては、例えば１インチあたりの開口数が７０（開口率６５％）である基材を用いた場合には、全体として２５％～５５％程度の範囲で開口率を制御することができる。これは、１インチあたりの開口数が２５０～１００の基材を用いた場合と同等である。このように、透孔性ネット材１０においては、様々な開口率の基材を用いることなく、一意の開口率の基材を用いるのみで、開口率の微調整を行うことができ、結果として、要求仕様に応じた目隠し性や音抜け性の微妙な調整を行うことができる。 Therefore, in the permeable net material 10, the overall aperture ratio can be adjusted by changing the aperture ratio of the hot melt adhesive film while using a base material having a unique aperture ratio. For the permeable net material 10, for example, when a base material having a numerical aperture per inch of 70 (aperture ratio 65%) is used, the aperture ratio is controlled in a range of about 25% to 55% as a whole. can do. This is equivalent to the case where a substrate having a numerical aperture per inch of 250 to 100 is used. Thus, in the permeable net material 10, the aperture ratio can be finely adjusted only by using the base material with a unique aperture ratio without using the base material with various aperture ratios. Subtle adjustment of blinding and sound omission according to the required specifications can be performed.
　次に、透孔性ネット材１０の製造方法について説明する。
　透孔性ネット材１０は、図５に示すような製造装置２０によって製造することができる。まず、ホットメルト接着剤フィルムＦは、その接着剤原料を所定の押出機２１に投入して溶融混練し、その溶融物を所定の温度に設定されたＴダイ２２を介して例えば３０μｍ～４０μｍ程度の厚みで層状に流出させることによって成形される。
　ここで、Ｔダイ２２の設定温度は、当該Ｔダイ２２を介して流出されるホットメルト接着剤フィルムＦの流出温度が、上述した軟化温度よりも高い１１０℃～１２０℃程度となるように、１４０℃～１８０℃程度に設定される。
　なお、製造装置２０は、Ｔダイ２２によるＴダイ成形法ではなくインフレーション成形法を適用したものとしてもよい。 Next, the manufacturing method of the permeable net | network material 10 is demonstrated.
The permeable net material 10 can be manufactured by a manufacturing apparatus 20 as shown in FIG. First, in the hot melt adhesive film F, the adhesive raw material is put into a predetermined extruder 21 and melt kneaded, and the melt is about 30 μm to 40 μm, for example, through a T die 22 set at a predetermined temperature. It is formed by allowing it to flow out in layers with a thickness of.
Here, the set temperature of the T die 22 is such that the outflow temperature of the hot melt adhesive film F flowing out through the T die 22 is about 110 ° C. to 120 ° C., which is higher than the softening temperature described above. It is set to about 140 ° C to 180 ° C.
The manufacturing apparatus 20 may apply an inflation molding method instead of the T die molding method using the T die 22.
　このようにして層状に流出したホットメルト接着剤フィルムＦは、所定の張力をもって巻き出し部２３から繰り出された長尺状の基材Ｂが通過するニップロール部２４に到達する。このニップロール部２４を構成する一方のローラ２４ａは、シリコーンゴム等の高耐熱性のゴム製ローラが用いられ、他方のローラ２４ｂは、その表面に、ポリ４四フッ化エチレン樹脂等のフッ素樹脂、例えば、テフロン（登録商標）がコーティングされたクロム等の金属製ローラからなる。ニップロール部２４は、これら１対のローラ２４ａ，２４ｂが所定の圧力で当接しながら回転駆動することにより、基材Ｂの片面にホットメルト接着剤フィルムＦを均一に押し込みながら塗布する。ここで、ニップロール部２４は、加熱されるのではなく、ホットメルト接着剤フィルムＦがローラ２４ａ，２４ｂに付着しないように１７℃～１９℃の常温に温度設定された冷却水によって冷却される。すなわち、１１０℃～１２０℃程度の温度で流出されるホットメルト接着剤フィルムＦは、このニップロール部２４を通過するのに応じて冷却されることになる。また、ニップロール部２４による圧力は、基材Ｂにホットメルト接着剤フィルムＦが塗布された状態での全体厚みが１０５μｍ以下となるように設定され、１００μｍ程度の厚みとする場合には、３．５ｋｇ／ｃｍ2程度とされる。 Thus, the hot melt adhesive film F that has flowed out in layers reaches the nip roll portion 24 through which the long base material B fed out from the unwinding portion 23 with a predetermined tension passes. One roller 24a constituting the nip roll portion 24 is made of a highly heat-resistant rubber roller such as silicone rubber, and the other roller 24b has a fluororesin such as poly-4 tetrafluoroethylene resin on its surface, For example, it is made of a metal roller such as chromium coated with Teflon (registered trademark). The nip roll portion 24 is applied while the hot melt adhesive film F is uniformly pushed onto one surface of the base material B by being driven to rotate while the pair of rollers 24 a and 24 b are in contact with each other at a predetermined pressure. Here, the nip roll portion 24 is not heated, but is cooled by cooling water set at a normal temperature of 17 ° C. to 19 ° C. so that the hot melt adhesive film F does not adhere to the rollers 24a and 24b. That is, the hot melt adhesive film F that flows out at a temperature of about 110 ° C. to 120 ° C. is cooled as it passes through the nip roll portion 24. Moreover, the pressure by the nip roll part 24 is set so that the whole thickness in the state by which the hot-melt-adhesive film F was apply | coated to the base material B will be 105 micrometers or less, and when setting it as the thickness of about 100 micrometers, it is 3. It is about 5 kg / cm 2 .
　そして、基材Ｂにホットメルト接着剤フィルムＦが塗布された塗布物は、オーブンやドライヤー等の乾燥装置２５に搬入されて所定温度で乾燥され、これら基材Ｂとホットメルト接着剤フィルムＦとがラミネートされることにより、透孔性ネット材１０が製造される。ホットメルト接着剤フィルムＦの透孔は、この工程によって形成される。
　特に、この透孔は、例えば図６（ａ）（ｂ）及び図７（ａ）（ｂ）に示すように、平織りの基材Ｂを構成する糸材のうち、基材Ｂに対するホットメルト接着剤フィルムＦの塗布方向に対して水平方向に延在する糸材が、基材Ｂにおけるホットメルト接着剤フィルムＦの塗布面側に位置する領域に形成される。換言すれば、ホットメルト接着剤フィルムＦは、基材Ｂを構成する水平方向及び垂直方向に延在する糸材が交差する領域のうち、基材Ｂに対するホットメルト接着剤フィルムＦの塗布方向に対して水平方向に延在する糸材が、基材Ｂにおけるホットメルト接着剤フィルムＦの塗布面とは反対側の面側に位置する領域近傍では基材Ｂ上にそのまま残存して透孔の頂部を形成し、さらに、この頂部から当該基材Ｂの糸材の延材方向に対して斜め方向に隣接する基材の頂部へ延在するように橋架け部５が形成され、これにより略菱形状の開口部が形成される。
　なお、図６（ａ）（ｂ）及び図７（ａ）（ｂ）は、同一の仕様からなる基材Ｂに、異なる物性のホットメルト接着剤フィルムＦを塗布して製造された透孔性ネット材１０の具体例を示している。透孔性ネット材１０は、これら図６（ａ）（ｂ）及び図７（ａ）（ｂ）からも明らかなように、異なる物性のホットメルト接着剤フィルムＦを用いても同様に、ホットメルト接着剤フィルムＦの透孔の形状が、基材Ｂの透孔を横切るように接着剤原料が橋架けされることによって略菱形形状とされたものとなる。 Then, the coated material in which the hot melt adhesive film F is applied to the base material B is carried into a drying device 25 such as an oven or a dryer and dried at a predetermined temperature. The base material B, the hot melt adhesive film F, Is laminated to produce the permeable net material 10. The through holes of the hot melt adhesive film F are formed by this process.
In particular, the through-hole is formed by hot-melt adhesion to the base material B among the yarn materials constituting the plain-woven base material B, as shown in FIGS. 6 (a), 6 (b) and 7 (a), (b). The thread material extending in the horizontal direction with respect to the application direction of the agent film F is formed in a region located on the application surface side of the hot melt adhesive film F in the base material B. In other words, the hot melt adhesive film F is in the direction in which the hot melt adhesive film F is applied to the base material B in the region where the thread materials extending in the horizontal direction and the vertical direction constituting the base material B intersect. On the other hand, the thread material extending in the horizontal direction remains as it is on the base material B in the vicinity of the region located on the surface side of the base material B opposite to the surface to which the hot melt adhesive film F is applied. Further, the bridge portion 5 is formed so as to extend from the top portion to the top portion of the base material that is adjacent to the base material B in the oblique direction with respect to the direction in which the yarn material of the base material B extends. A diamond-shaped opening is formed.
6 (a) (b) and 7 (a) (b) are pores manufactured by applying hot-melt adhesive film F having different physical properties to base material B having the same specifications. A specific example of the net member 10 is shown. As is clear from FIGS. 6A, 6B and 7A, 7B, the permeable net material 10 is also hot when the hot melt adhesive film F having different physical properties is used. The shape of the through holes of the melt adhesive film F is formed into a substantially rhombus shape by bridging the adhesive raw material so as to cross the through holes of the base material B.
　そして、上述した製造装置２０は、このような透孔が形成された長尺状の透孔性ネット材１０を巻き取り部２６によって巻き取り、一連の製造工程を終了する。巻き取り部２６によって巻き取られた長尺状の透孔性ネット材１０は、被接着体であるパンチングシート２のサイズに応じて所定の大きさに裁断され、使用されることになる。 And the manufacturing apparatus 20 mentioned above winds up the elongate permeable net material 10 in which such a through-hole was formed by the winding-up part 26, and complete | finishes a series of manufacturing processes. The long permeable net member 10 taken up by the take-up unit 26 is cut into a predetermined size according to the size of the punching sheet 2 that is an adherend and used.
　以上説明した透孔性ネット材１０は、一意の開口率の基材Ｂを用いながらも、ホットメルト接着剤フィルムＦの開口率を変化させることにより、全体の開口率を微調整することができ、結果として、要求仕様に応じた目隠し性や音抜け性の微妙な調整を行うことができる。そのため、透孔性ネット材１０は、様々な開口率の基材を用意して開口率を調整する場合に比べて、製造コストの削減も期待される。また、この透孔性ネット材１０は、ニップロール部２４によって均一にラミネートされたホットメルト接着剤フィルムＦを用いることから、従来の液状接着剤を用いてパンチングシートに貼り合せた透孔性ネット材に比べて、パンチングシート２に貼り合わせる際の作業性が良好であり、かつ、パンチングシート２に対する接着性が強く、接着強度のバラツキも少ないという利点を有する。 The porous net material 10 described above can finely adjust the overall aperture ratio by changing the aperture ratio of the hot-melt adhesive film F while using the base material B having a unique aperture ratio. As a result, it is possible to finely adjust the blinding and sound omission according to the required specifications. Therefore, the permeable net material 10 is expected to reduce the manufacturing cost as compared with the case of preparing a base material having various opening ratios and adjusting the opening ratio. Moreover, since this porous net material 10 uses the hot-melt adhesive film F uniformly laminated by the nip roll part 24, the porous net material bonded to a punching sheet using a conventional liquid adhesive Compared to the above, there is an advantage that workability at the time of bonding to the punching sheet 2 is good, adhesion to the punching sheet 2 is strong, and variation in adhesive strength is small.
　なお、本発明は、上述した実施の形態に限定されるものではない。
　例えば、上述した実施の形態では、スピーカに使用されるネット材について説明したが、本発明は、マイクロフォン等の他の音響機器のキャビネット装置に適用することもでき、また、空調機器をはじめとする各種フィルタにも適用することができる。 The present invention is not limited to the embodiment described above.
For example, in the above-described embodiment, the net material used for the speaker has been described. However, the present invention can also be applied to a cabinet device of other audio equipment such as a microphone, and includes an air conditioner. It can also be applied to various filters.
　このように、本発明は、その趣旨を逸脱しない範囲で適宜変更が可能であることはいうまでもない。 Thus, it goes without saying that the present invention can be modified as appropriate without departing from the spirit of the present invention.
　以下、本発明を適用した透孔性ネット材の具体的な実施例について、実験結果に基づいて説明する。 Hereinafter, specific examples of the porous net material to which the present invention is applied will be described based on experimental results.
　まず、本願発明者は、ホットメルト接着剤フィルムの物性の違いによる特性を比較するために、次表１に示す物性のホットメルト接着剤フィルムを用いて透孔性ネット材を作製し、目隠し性、音抜け性及び可視光線の透過率を評価した。 First, in order to compare the properties of the hot melt adhesive film due to the difference in physical properties, the inventor of the present application produced a permeable net material using the hot melt adhesive film having the physical properties shown in Table 1 below, and was blinded. The sound omission and visible light transmittance were evaluated.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　具体的には、実施例１の透孔性ネット材として、１インチあたりの開口数が７０（開口率６５％）である平織りの基材に、軟化温度が６０℃、１５０℃環境下での溶融粘度が１５０Ｐａ・ｓであり発泡剤を含有しないホットメルト接着剤フィルムをラミネートしたものを作製した。
　また、比較例１の透孔性ネット材として、１インチあたりの開口数が７０（開口率６５％）である平織りの基材に、軟化温度が６０℃、１５０℃環境下での溶融粘度が２５０Ｐａ・ｓであるホットメルト接着剤フィルムをラミネートしたものを作製した。
　さらに、比較例２の透孔性ネット材として、１インチあたりの開口数が７０（開口率６５％）である平織りの基材に、軟化温度が７０℃、１５０℃環境下での溶融粘度が１５０Ｐａ・ｓであるホットメルト接着剤フィルムをラミネートしたものを作製した。そして、目隠し性及び音抜け性の指標として、可視光線の透過率を測定した。
　この場合、可視光線の透過率は、スガ試験機社製の「可視光線透過率・反射率計　HA-TR」を用いて測定した。 Specifically, as a porous net material of Example 1, a plain weave base material with a numerical aperture per inch of 70 (aperture ratio 65%) was applied to a softening temperature of 60 ° C. and 150 ° C. A laminate of a hot melt adhesive film having a melt viscosity of 150 Pa · s and containing no foaming agent was prepared.
Further, as a permeable net material of Comparative Example 1, a plain weave base material having a numerical aperture per inch of 70 (aperture ratio 65%) has a softening temperature of 60 ° C. and a melt viscosity in an environment of 150 ° C. What laminated | stacked the hot-melt-adhesive film which is 250 Pa * s was produced.
Furthermore, as a permeable net material of Comparative Example 2, a plain weave base material having a numerical aperture per inch of 70 (opening ratio 65%) has a softening temperature of 70 ° C. and a melt viscosity in an environment of 150 ° C. A laminate having a hot melt adhesive film of 150 Pa · s was produced. And the transmittance | permeability of visible light was measured as a parameter | index of blinding property and sound-missing property.
In this case, the visible light transmittance was measured using a “visible light transmittance / reflectometer HA-TR” manufactured by Suga Test Instruments Co., Ltd.
　この結果、表１に示すように、実施例１として作製した透孔性ネット材の可視光線の透過率は４５％となり、通常の製品に対する要求仕様である４０％以上の特性が得られた。
　また、ポリスチレンからなるパンチングシートに貼り合わせた実施例１の透孔性ネット材を、１８０°剥離機を用いて引張速度３００ｍｍ／分で剥離して求めた接着力は、１４Ｎ／２ｃｍとなり、ホットメルト接着剤に発泡剤を含有する透孔性ネット材の接着力と同等であり、液状接着剤を用いて同パンチングシートに貼り合せた透孔性ネット材の接着力６Ｎ／２ｃｍに比べて大幅に良好な結果が得られた。 As a result, as shown in Table 1, the visible light transmittance of the porous net material produced as Example 1 was 45%, and the characteristics of 40% or more, which is the required specification for ordinary products, were obtained.
Moreover, the adhesive force obtained by peeling the porous net material of Example 1 bonded to a punching sheet made of polystyrene at a pulling speed of 300 mm / min using a 180 ° peeling machine was 14 N / 2 cm, which was hot. It is equivalent to the adhesive strength of a porous net material containing a foaming agent in the melt adhesive, and is much larger than the adhesive strength of 6N / 2cm of the porous net material bonded to the punching sheet using a liquid adhesive. Good results were obtained.
　一方、比較例１として作製した透孔性ネット材は、実施例１のものに比べて溶融粘度が高いことに起因して十分な透孔が形成されておらず、可視光線の透過率が１５％に低下し、また、比較例２として作製した透孔性ネット材は、実施例１のものに比べて軟化温度が高いことに起因して殆ど透孔が形成されておらず、可視光線の透過率が５％と大幅に低下していることが観察された。 On the other hand, the porous net material produced as Comparative Example 1 has a melt viscosity higher than that of Example 1, so that sufficient pores are not formed, and the visible light transmittance is 15%. In addition, the permeable net material produced as Comparative Example 2 has almost no through holes due to its higher softening temperature than that of Example 1, and visible light rays. It was observed that the transmittance was greatly reduced to 5%.
　また、ホットメルト接着剤フィルムの加熱温度に対する溶融粘度の変化を求めた。具体的には、実施例２のホットメルト接着剤フィルムとして、軟化温度が６１．７℃のものを用意した。この実施例２と比較するために、比較例３のホットメルト接着剤フィルムとして、軟化温度が８８．４℃のものを、比較例４のホットメルト接着剤フィルムとして、軟化温度が５２℃のものを、比較例５のホットメルト接着剤フィルムとして、軟化温度が８５．３℃のものをそれぞれ用意した。これら比較例３乃至比較例５としてのホットメルト接着剤フィルムは、いずれも透孔が形成されない物性のものである。そして、これらホットメルト接着剤フィルムを加熱して各温度における溶融粘度を求めると、図８に示すような結果が得られた。 Also, the change in melt viscosity with respect to the heating temperature of the hot melt adhesive film was determined. Specifically, a hot melt adhesive film of Example 2 having a softening temperature of 61.7 ° C. was prepared. For comparison with Example 2, the hot melt adhesive film of Comparative Example 3 having a softening temperature of 88.4 ° C. and the hot melt adhesive film of Comparative Example 4 having a softening temperature of 52 ° C. Were prepared as Comparative Example 5 hot melt adhesive films having a softening temperature of 85.3 ° C., respectively. These hot melt adhesive films as Comparative Examples 3 to 5 have physical properties in which no through holes are formed. And when these hot-melt-adhesive adhesive films were heated and melt viscosity in each temperature was calculated | required, the result as shown in FIG. 8 was obtained.
　図８に示すように、比較例５の溶融粘度曲線は、実施例２の溶融粘度曲線と近似するにもかかわらず、比較例５のホットメルト接着剤フィルムの軟化温度が実施例２のものに比べて高いことから、十分な透孔が形成されていないという結果が得られた。このことから、単に溶融粘度曲線が合うように物性を制御しても、適切なホットメルト接着剤フィルムを得ることはできず、軟化温度と溶融粘度との組み合わせが重要であることが伺える。
　さらに、基材の織り方の違いによる特性を比較するために、表２に示す織り方の基材を用いて透孔性ネット材を作製し、目隠し性、音抜け性を評価した。
　具体的には、上述した平織りの基材（横糸：縦糸＝１：１）を用いた実施例１の透孔性ネット材に対し、綾織りの基材（横糸：縦糸＝２：３）に、実施例１と同一の発泡剤を含有しないホットメルト接着剤フィルムをラミネートした実施例３と、朱子折りの基材（横糸：縦糸＝１：４）に、実施例１と同一の発泡剤を含有しないホットメルト接着剤フィルムをラミネートした実施例４の透孔性ネット材を作製し、それぞれの目隠し性、音抜け性を評価した。
　この場合、目隠し性については、パンチングシート、透光性ネット及びスピーカ本体を貼り合わせて、パンチングシート側から視認した場合に、スピーカが見えないものを○とし、その一方、視認できるもののスピーカであるとまでは認識できないものを△とした。
　一方、音抜け性については、可視光線の透過率によって評価した。この場合、使用したホットメルト接着剤はカーボン粒子を含有しているため、透孔が形成されない場合には、可視光線の透過率は３４％となった。 As shown in FIG. 8, although the melt viscosity curve of Comparative Example 5 approximates the melt viscosity curve of Example 2, the softening temperature of the hot melt adhesive film of Comparative Example 5 is that of Example 2. Since it was higher than that, a result that sufficient through holes were not formed was obtained. From this, it can be seen that even if the physical properties are controlled so that the melt viscosity curves are matched, an appropriate hot melt adhesive film cannot be obtained, and the combination of the softening temperature and the melt viscosity is important.
Furthermore, in order to compare the characteristics depending on the weaving method of the base material, a porous net material was produced using the base material of the weaving method shown in Table 2, and the blinding property and the sound omission property were evaluated.
Specifically, the twill weave base material (weft yarn: warp yarn = 2: 3) is different from the porous net material of Example 1 using the above-described plain weave base material (weft yarn: warp yarn = 1: 1). The same foaming agent as in Example 1 was applied to Example 3 in which a hot-melt adhesive film not containing the same foaming agent as in Example 1 was laminated, and a satin-folded base material (weft yarn: warp yarn = 1: 4). The permeable net material of Example 4 which laminated the hot-melt-adhesive film which does not contain was produced, and each blinding property and sound loss property were evaluated.
In this case, as for the blindness, when the punching sheet, the translucent net and the speaker main body are bonded together and viewed from the punching sheet side, the speaker is not visible, and on the other hand, the speaker is visible. Those that could not be recognized until △ were marked as △.
On the other hand, the sound loss was evaluated by the visible light transmittance. In this case, since the hot melt adhesive used contained carbon particles, the visible light transmittance was 34% when no through-holes were formed.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　表２から理解されるように、平織りの基材を用いた実施例１の透孔性ネット材は、ホットメルト接着剤フィルムの透孔が菱形形状に形成されるため、目隠し性が良好で、かつ、可視光線の透過率が４５％であり、目隠し性と音抜け性のバランスの良い透孔性ネット材が得られた。
　他方、綾織りの基材を用いた実施例３、実施例４の透孔性ネット材は、可視光線の透過率がそれぞれ５２％、５８％であって、実施例１のものより音抜け性の向上が見られるが、共に透孔の形状が平行四辺形であり、目隠し性が実施例１のものと比べてやや劣っていた。
　ただし、実施例３及び実施例４の透孔性ネット材であっても、実用上は問題はないものが得られた。  As can be seen from Table 2, the porous net material of Example 1 using a plain weave base material has good blindfolding because the holes of the hot melt adhesive film are formed in a rhombus shape, In addition, a transparent net material having a visible light transmittance of 45% and a good balance between blinding and sound omission was obtained.
On the other hand, the porous net materials of Example 3 and Example 4 using a twill weave base material have visible light transmittances of 52% and 58%, respectively, and sound leakage is better than that of Example 1. However, the shape of the through holes was a parallelogram, and the blinding property was slightly inferior to that of Example 1.
However, even if it was the permeable net material of Example 3 and Example 4, what was satisfactory in practical use was obtained.

Claims (18)

  1. 　微細な透孔を有する基材の片面に、発泡剤を含有しないホットメルト接着剤を原料とするホットメルト接着剤フィルムをラミネートした透孔性熱接着シートからなり、
    　上記基材の透孔は、格子状に形成されたものであり、
    　上記ホットメルト接着剤フィルムには、当該接着剤原料が上記基材の透孔を横切るように橋架けされることによって透孔が形成されている透孔性ネット材。     It consists of a permeable thermoadhesive sheet in which a hot melt adhesive film made from a hot melt adhesive that does not contain a foaming agent is laminated on one side of a substrate having fine through holes,
    The through holes of the base material are formed in a lattice shape,
    The hot-melt adhesive film is a permeable net material in which through holes are formed by bridging the adhesive raw material so as to cross the through holes of the base material.
  2. 　上記ホットメルト接着剤フィルムの透孔は、上記基材の透孔を横切るように上記接着剤原料が橋架けされることによって菱形形状とされている請求項１記載の透孔性ネット材。 The perforated net material according to claim 1, wherein the through holes of the hot melt adhesive film are formed in a rhombus shape by bridging the adhesive raw material so as to cross the through holes of the base material.
  3. 　上記基材は、所定の糸材が平織りされたものであり、上記ホットメルト接着剤フィルムは、当該接着剤原料が、上記平織りの基材の頂部から上記糸材の延材方向に対して斜め方向に隣接する基材の頂部へ橋架けされることによってそれぞれ菱形形状の透孔が形成されている請求項１又は２のいずれか１項記載の透孔性ネット材。 The base material is a plain weave of a predetermined thread material, and the hot-melt adhesive film has an adhesive material that is slanted from the top of the base material of the plain weave to the extending direction of the thread material. The permeable net | network material of any one of Claim 1 or 2 in which the rhombus-shaped through-hole is formed by being bridged to the top part of the base material adjacent to a direction.
  4. 　上記ホットメルト接着剤フィルムの透孔は、上記基材を構成する糸材のうち、当該基材に対する当該ホットメルト接着剤フィルムの塗布方向に対して水平方向に延在する糸材が、当該基材における当該ホットメルト接着剤フィルムの塗布面側に位置する領域に形成されている請求項１乃至３のいずれか１項記載の透孔性ネット材。 The through hole of the hot-melt adhesive film is formed of a thread material that extends in a horizontal direction with respect to a direction in which the hot-melt adhesive film is applied to the base material. The permeable net material of any one of Claims 1 thru | or 3 currently formed in the area | region located in the application | coating surface side of the said hot-melt-adhesive film in a material.
  5. 　上記ホットメルト接着剤フィルムは、軟化温度が５０℃～６５℃のホットメルト接着剤を原料としたものである請求項１乃至４のいずれか１項記載の透孔性ネット材。 The porous net material according to any one of claims 1 to 4, wherein the hot melt adhesive film is made from a hot melt adhesive having a softening temperature of 50 ° C to 65 ° C.
  6. 　上記ホットメルト接着剤フィルムは、１５０℃環境下での溶融粘度が２００Ｐａ・ｓ以下のホットメルト接着剤を原料としたものである請求項１乃至５のいずれか１項記載の透孔性ネット材。 The porous network material according to any one of claims 1 to 5, wherein the hot melt adhesive film is made from a hot melt adhesive having a melt viscosity of 200 Pa · s or less in an environment of 150 ° C as a raw material. .
  7. 　上記基材は、１インチあたりの開口数が５０～１００となるように透孔が形成されたものである請求項１乃至６のいずれか１項記載の透孔性ネット材。 The permeable net material according to any one of claims 1 to 6, wherein the base material is formed with through holes so that the numerical aperture per inch is 50 to 100.
  8. 　上記基材は、９５μｍ以下の太さからなる糸材からなる請求項３乃至７のいずれか１項記載の透孔性ネット材。 The permeable net material according to any one of claims 3 to 7, wherein the base material is made of a thread material having a thickness of 95 µm or less.
  9. 　上記糸材は、黒色からなるものである請求項８記載の透孔性ネット材。 The permeable net material according to claim 8, wherein the thread material is made of black.
  10. 　微細な透孔を有する基材の片面に、発泡剤を含有しないホットメルト接着剤を原料とするホットメルト接着剤フィルムをラミネートした透孔性熱接着シートからなる透孔性ネット材の製造方法であって、
    　上記基材が通過するニップロール部を構成する一対のローラを常温に温度設定した状態で、所定の溶融粘度からなる上記ホットメルト接着剤フィルムの溶融物を当該ホットメルト接着剤フィルムの軟化温度よりも高い温度で層状に流出させて上記ニップロール部に供給する工程と、
    　上記ニップロール部を駆動させて上記基材の片面に上記ホットメルト接着剤フィルムを均一に押し込みながら塗布する工程と、
    　上記基材に上記ホットメルト接着剤フィルムが塗布された塗布物を、所定の乾燥装置によって所定温度で乾燥する工程とを備える透孔性ネット材の製造方法。     A method for producing a permeable net material comprising a permeable thermoadhesive sheet obtained by laminating a hot-melt adhesive film made of a hot-melt adhesive containing no foaming agent on one side of a substrate having fine pores. There,
    In a state where the pair of rollers constituting the nip roll portion through which the base material passes is set at a normal temperature, the melt of the hot melt adhesive film having a predetermined melt viscosity is set to be higher than the softening temperature of the hot melt adhesive film. Supplying the nip roll part with a layered flow at a high temperature; and
    Applying the hot-melt adhesive film while driving the nip roll part and uniformly pressing the hot-melt adhesive film on one side of the substrate;
    A method for producing a porous net material comprising: a step of drying a coated product obtained by applying the hot melt adhesive film to the substrate at a predetermined temperature using a predetermined drying device.
  11. 　上記ホットメルト接着剤フィルムは、軟化温度が５０℃～６５℃のホットメルト接着剤を原料としたものである請求項１０記載の透孔性ネット材の製造方法。 The method for producing a porous net material according to claim 10, wherein the hot melt adhesive film is made from a hot melt adhesive having a softening temperature of 50 ° C to 65 ° C.
  12. 　上記ホットメルト接着剤フィルムは、１５０℃環境下での溶融粘度が２００Ｐａ・ｓ以下のホットメルト接着剤を原料としたものである請求項１０又は１１のいずれか１項記載の透孔性ネット材の製造方法。 The porous net material according to any one of claims 10 and 11, wherein the hot melt adhesive film is made from a hot melt adhesive having a melt viscosity of 200 Pa · s or less in an environment of 150 ° C. Manufacturing method.
  13. 　上記基材は、１インチあたりの開口数が５０～１００となるように透孔が形成されたものである請求項１０乃至１２のいずれか１項記載の透孔性ネット材の製造方法。 The method for producing a perforated net material according to any one of claims 10 to 12, wherein the base material is formed with through holes so that the numerical aperture per inch is 50 to 100.
  14. 　上記基材は、９５μｍ以下の太さからなる糸材からなるものである請求項１０乃至１３のいずれか１項記載の透孔性ネット材の製造方法。 The method for producing a permeable net material according to any one of claims 10 to 13, wherein the base material is made of a thread material having a thickness of 95 µm or less.
  15. 　上記糸材は、黒色からなるものである請求項１４記載の透孔性ネット材の製造方法。 The method for producing a porous net material according to claim 14, wherein the thread material is made of black.
  16. 　上記ホットメルト接着剤フィルムは、その流出温度が１１０℃～１２０℃となるように上記ニップロール部に流出供給され、
    　上記ニップロール部を構成するローラは、１７℃～１９℃の温度に温度設定された冷却水によって冷却されている請求項１０乃至１５のいずれか１項記載の透孔性ネット材の製造方法。     The hot melt adhesive film is supplied and supplied to the nip roll so that the outflow temperature is 110 ° C. to 120 ° C.
    The method for producing a permeable net member according to any one of claims 10 to 15, wherein the roller constituting the nip roll portion is cooled by cooling water set to a temperature of 17 ° C to 19 ° C.
  17. 　上記ニップロール部を構成する一方のローラは、所定のゴム製ローラであり、他方のローラは、所定の金属製ローラである請求項１６記載の透孔性ネット材の製造方法。 The method for producing a permeable net member according to claim 16, wherein one roller constituting the nip roll portion is a predetermined rubber roller, and the other roller is a predetermined metal roller.
  18. 　上記金属製ローラの表面には、フッ素樹脂がコーティングされている請求項１７記載の透孔性ネット材の製造方法。  The method for producing a porous net material according to claim 17, wherein a surface of the metal roller is coated with a fluororesin.
PCT/JP2009/070771 2009-12-11 2009-12-11 Porous net material and method for producing same WO2011070679A1 (en)

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KR1020127013334A KR101636598B1 (en) 2009-12-11 2009-12-11 Porous net material and method for producing same
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JPS59145273A (en) * 1983-02-07 1984-08-20 Sony Corp Heat-bondable sheet having through-hole and production thereof
JPS59145272A (en) * 1983-02-07 1984-08-20 Sony Corp Heat-bondable sheet having through-hole and production thereof
JPS61126192A (en) * 1984-11-21 1986-06-13 Hiraoka & Co Ltd Repair sheet for air-permeable sheet
JP2000502739A (en) * 1995-12-22 2000-03-07 ミネソタ マイニング アンド マニュファクチャリング カンパニー Adhesive tape and manufacturing method thereof
WO2005002483A2 (en) * 2003-06-25 2005-01-13 Andover Coated Products, Inc. Pressure-sensitive adhesive tapes
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JPS59145273A (en) * 1983-02-07 1984-08-20 Sony Corp Heat-bondable sheet having through-hole and production thereof
JPS59145272A (en) * 1983-02-07 1984-08-20 Sony Corp Heat-bondable sheet having through-hole and production thereof
JPS61126192A (en) * 1984-11-21 1986-06-13 Hiraoka & Co Ltd Repair sheet for air-permeable sheet
JP2000502739A (en) * 1995-12-22 2000-03-07 ミネソタ マイニング アンド マニュファクチャリング カンパニー Adhesive tape and manufacturing method thereof
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WO2009151115A1 (en) * 2008-06-13 2009-12-17 ソニーケミカル＆インフォメーションデバイス株式会社 Porous net material and manufacturing method thereof

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