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WO2019004432A1 - Procédé de production d'élément d'étanchéité et procédé de liaison d'éléments - Google Patents

Procédé de production d'élément d'étanchéité et procédé de liaison d'éléments Download PDF

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Publication number
WO2019004432A1
WO2019004432A1 PCT/JP2018/024818 JP2018024818W WO2019004432A1 WO 2019004432 A1 WO2019004432 A1 WO 2019004432A1 JP 2018024818 W JP2018024818 W JP 2018024818W WO 2019004432 A1 WO2019004432 A1 WO 2019004432A1
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WO
WIPO (PCT)
Prior art keywords
tube
porous body
seal member
woven fabric
manufacturing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/024818
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English (en)
Japanese (ja)
Inventor
文人 竹内
友則 中島
健吾 後藤
宏行 宮武
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Chemicals Inc
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Mitsui Chemicals Inc
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Filing date
Publication date
Application filed by Mitsui Chemicals Inc filed Critical Mitsui Chemicals Inc
Priority to JP2019527060A priority Critical patent/JP6851479B2/ja
Publication of WO2019004432A1 publication Critical patent/WO2019004432A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/70—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by moulding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing

Definitions

  • the present invention relates to a method of manufacturing a seal member used for a vehicle, a door of a building or the like, and a method of joining members.
  • a door provided in a vehicle such as an automobile or a building usually has a configuration in which a seal member (packing) is attached to an outer peripheral edge portion of a door main body made of a rigid body such as metal to improve sealing.
  • the sealing member desirably has high sound insulation to keep the room quiet in addition to the heat resistance and the weather resistance, in addition to suppressing the infiltration of water and dust.
  • a normal seal member is attached to the outer peripheral edge of the door body, and exhibits excellent sealing performance in a state of being sandwiched and compressed between the door body and the door frame. Therefore, the seal member is often in the form of a hollow tube made of an elastomer that can be easily elastically deformed so as to be sandwiched and compressed between the door body and the door frame.
  • Patent Document 1 discloses a configuration in which a hard core material and a soft filler are inserted into a hollow tube (hollow seal portion) to prevent excessive deformation.
  • a columnar cushion made of rubber or synthetic resin high-foamed sponge is provided inside a hollow tube (hollow seal portion). The inside of the tube is not completely blocked by the columnar cushion portion, and two air holding spaces (closed space portions) are left inside the tube.
  • a high foam sponge material made of rubber or synthetic resin is provided inside a hollow tube (hollow seal portion). The inside of the tube is not completely blocked by the highly foamed sponge material, and an air holding space (air layer) is left inside the tube.
  • Patent Document 4 discloses a method of producing an open-cell type foam.
  • Patent Document 7 discloses a technique of ultrasonically welding a rubber member having a rubber-joined rough surface having a predetermined roughness and a resin member having a resin-joined rough surface having a predetermined roughness.
  • Patent Document 8 is a web having a configuration in which a non-woven fabric (decorative layer) is provided via a resin adhesive layer to a trim portion having a substantially U-shaped cross section provided protruding from a part of a tube (hollow seal portion). The strip is disclosed.
  • Patent Documents 2 and 3 disclose a weather strip having a configuration in which a high foam sponge is disposed inside a hollow tube. Furthermore, it is also disclosed that the weather strip has a waterproof function as well as a soundproof function. It is well known to those skilled in the art that the weather strip is provided with an air vent for facilitating deformation in order to exert expected performance by deformation. Thus, in the configuration in which the air vent holes are provided, it is general to use a material with relatively low water absorbability among highly foamed materials in order to suppress the entry and retention of water inside as much as possible.
  • the hollow seal portion and the high-foaming sponge are integrally extrusion molded, and basically the same kind of material (foaming sponge made of rubber or synthetic resin) It consists of. That is, for the purpose of improving the sound insulation, it is not assumed that members provided inside the hollow tube are arbitrarily selected from various materials regardless of the material of the tube.
  • Patent Document 4 is a double tube structure in which a sound absorbing material such as glass wool is inserted into a waterproof tube and then inserted into a hollow tube (hollow seal portion). Therefore, since it is necessary to insert the insertion member into the hollow tube after the insertion member is manufactured by filling the sound absorbing material such as glass wool inside the waterproof tube having a thin film thickness, many manufacturing processes are required. It is complicated. In addition, it is necessary to make the thickness of the film thinner so that the sound absorbing property of the sound absorbing material is not reduced in the waterproof tube, and the thinner the waterproof tube, the more complicated the process of filling the sound absorbing material. Therefore, in the invention described in Patent Document 4, it is difficult to simultaneously maintain the sound absorbing effect by the sound absorbing material and reduce the complexity of the manufacturing process. Further, none of Patent Documents 1 to 4 mentions the frequency selectivity of sound insulation.
  • weight reduction is desired for the door for vehicles and the door for buildings considered as the use of a sealing member.
  • weight reduction of the entire vehicle is an important factor to improve traveling performance and maneuverability and to reduce fuel consumption, and the weight of the seal member can not be ignored.
  • the building door needs to be transported to the installation location, so weight reduction is desired in order to facilitate such work, especially when installed on a high floor of a building ing.
  • Patent Documents 1 to 4 completely consider the increase in weight due to the insertion members (hard core material and soft filler, columnar cushion portion, high foam sponge material, sound absorbing material and waterproof tube) for enhancing the sound insulation. Not.
  • Patent Documents 5 and 6 disclose compositions that can be used as part of the seal member, but the characteristics such as sound insulation of the seal member are not considered at all. Further, Patent Documents 7 and 8 propose special methods invented for joining members made of resin with high reliability. This indicates that in order to join the members with high reliability, restrictions on selection of materials, joining methods, and the like are large.
  • an object of the present invention is to provide a method of manufacturing a seal member which is high in heat resistance, weather resistance and sound insulation, is easy to manufacture, and can suppress an increase in weight, and a method of bonding members. .
  • the method of bonding members according to the present invention is characterized in that the melting peak temperature measured according to differential scanning calorimetry of the method of measuring the transition temperature of plastic specified in JIS K 7121 is 100 ° C. for the first member made of crosslinked rubber.
  • a second member made of a non-woven fabric containing a material having a temperature of 200 ° C. or less is joined by ultrasonic welding.
  • the first resin member is a hollow tube, and the non-woven fabric is fixed to the inside of the tube by the method of bonding members described above.
  • a method of manufacturing a seal member which is high in heat resistance, weather resistance and sound insulation, is easy to manufacture, and can suppress an increase in weight, and a method of bonding members.
  • FIG. 1 is a front view of a vehicle door having a seal member manufactured by the method according to the present invention.
  • FIG. 1 is a front view of a building door having a seal member manufactured by the method according to the present invention. It is a front view showing an example of a seal member manufactured by a method concerning the present invention.
  • FIG. 6 is a cross-sectional view of a seal member of Reference Example 1; It is a schematic diagram which shows an example of an acoustic characteristic measurement system. It is an enlarged view which shows the acoustic characteristic measurement state by the acoustic characteristic measurement system shown to FIG. 5A. It is a graph which shows an example of the acoustic characteristic measurement result by the acoustic characteristic measurement system shown to FIG. 5A.
  • FIG. 7 is a cross-sectional view of the seal member of Reference Example 2;
  • FIG. 10 is a cross-sectional view of the seal member of Reference Example 3;
  • FIG. 18 is a cross-sectional view of the seal member of Reference Example 4; It is a graph which shows the sound insulation of the sealing member of the reference example 4 and a prior art example.
  • FIG. 21 is a cross-sectional view of the seal member of Reference Example 6;
  • FIG. 7 is a cross-sectional view of a seal member of Comparative Example 1;
  • It is a graph which shows sound shielding volume of the seal member of comparative example 1, 2 and a prior art example.
  • FIG. 10 is a cross-sectional view of a seal member of Comparative Example 2;
  • FIG. 16 is a cross-sectional view of the seal member of Comparative Example 3; It is a graph which shows sound shielding volume of the sealing member of Comparative Example 3-5 and a prior art example.
  • FIG. 20 is a cross-sectional view of the seal member of Comparative Example 4;
  • FIG. 20 is a cross-sectional view of the seal member of Comparative Example 5;
  • FIG. 1 is a perspective view schematically showing a schematic configuration of a seal member of Examples 1 to 3 of the present invention, Reference Examples 1 to 6 and Comparative Examples 1 to 3.
  • FIG. 18 is a perspective view schematically showing a schematic configuration of a seal member of Embodiments 4, 6 to 8 and Reference Example 7 of the present invention. It is a perspective view which shows typically schematic structure of the sealing member of Example 9 of this invention. It is a perspective view which shows typically schematic structure of the sealing member of Examples 10 and 12 of this invention. It is a perspective view which shows typically schematic structure of the sealing member of a prior art example.
  • FIG. 28 is a front view of a seal member that is a composite member including the seal member shown in FIGS. 27A-27E. It is explanatory drawing which shows the step which inserts a porous body in a tube member of the manufacturing method of the sealing member of this invention.
  • FIG. 29A It is a perspective view which shows the tube member in the state to which the porous body was inserted at the step shown to FIG. 29A. It is a top view of the core used in the manufacturing method of the seal member of the present invention. It is a top view which shows the state which attached the tube member to the both ends of the core of the manufacturing method of the sealing member of this invention. It is a top view which shows the state which has arrange
  • FIG. 1 It is a top view which shows the state in which the joint was formed in the outer periphery of the core of the manufacturing method of the sealing member of this invention. It is a perspective view which shows typically the step of taking out the core of the manufacturing method of the seal member of the present invention. It is a top view which shows the sealing member manufactured by the manufacturing method of the sealing member of this invention. It is a top view which shows the state which has arrange
  • FIG. 1 It is a perspective view which shows the ultrasonic welding process of this invention.
  • FIG. 39A is a perspective view showing a step that follows the step shown in FIG. 39A. It is a top view which shows an example of the manufacturing method of the sealing member of this invention. It is a top view which shows the process of following the process shown to FIG. 40A. It is a top view which shows the process of following the process shown to FIG. 40B. It is a top view which shows the process of following the process shown to FIG. 40C. It is a top view which shows the state which the process shown to FIG. 40D completed.
  • FIG. 40D is a plan view showing a process following the process shown in FIGS. 40D to 40E. It is a top view which shows the other example of the manufacturing method of the sealing member of this invention.
  • FIG. 42 is a plan view showing a process following the process shown in FIG. 42C.
  • the seal member 1 is mainly used in the vehicle door 2 shown in FIG. 1 and the building door 4 shown in FIG. Specifically, the seal member 1 is attached to, for example, the outer peripheral edge of the vehicle door main body 2a of the vehicle door 2 shown in FIG. 1, and the vehicle door main body 2a and the two-dot chain line are schematically required It is used in a state of being pinched and compressed between a door frame 3a of a vehicle body 3 showing a part. Further, the seal member 1 is attached to the outer peripheral edge portion of the building door main body 4a of the building door 4 shown in FIG.
  • the seal member 1 used mainly for the vehicle door 2 shown in FIG. 1 will be described as an example, but the following description is substantially the same as the seal member 1 used for the building door 4.
  • the seal member 1 shown in FIGS. 3 and 4 has a hollow tube 6 and a porous body 7 disposed inside the tube 6.
  • the tube 6 is made of an elastically deformable elastomer, and is attached so as to be in close contact with the outer peripheral edge portion of the vehicle door main body 2a shown in FIG.
  • the tube 6 has a hollow portion having a substantially circular cross-sectional shape with an inner diameter of about 5 to 25 mm in an initial state (non-compressed state).
  • the tube 6 having a relatively simple shape is shown in FIGS. 3 and 4, it may be a shape further provided with an engaging portion and an attaching portion for attaching to the vehicle door main body 2a.
  • An example of the elastomer constituting the tube 6 is an ethylene / ⁇ -olefin / nonconjugated polyene copolymer, and the specific gravity in the non-compressed state is 0.3 or more and 1.0 or less and the water absorption rate is less than 50%.
  • tube 6 of other materials can also be used, and its specific gravity and water absorption may be different from the example mentioned above.
  • the measurement of water absorption rate is performed as follows. That is, a test piece of 20 mm ⁇ 20 mm was punched out of a tube-shaped processed product, and this test piece was depressurized to ⁇ 635 mmHg at a position of 50 mm below the water surface and held for 3 minutes.
  • the porous body 7 is inserted into the inside (hollow part) of the tube 6.
  • the inside of the tube 6 is not completely blocked by the porous body 7, and the air holding space 8 is provided between a part of the inner wall of the tube 6 and a part of the outer surface of the porous body 7 There is. That is, the air holding space 8 in the present application is surrounded by the inner wall (the surface forming the inner space) of the hollow tube 6 and the outer surface of the porous body 7 (but not including the pores of the surface of the porous body 7).
  • the air holding space 8 is a space which is at least wider than the pores of the porous body 7.
  • the maximum width of the air holding space 8 (maximum value of the distance between the inner wall of the tube 6 and the outer surface of the porous body 7 in the direction orthogonal to each part of the outer surface of the porous body 7) is 1 mm or more, more preferably Is 5 mm or more, more preferably 8 mm or more.
  • the proportion of the portion occupied by the air holding space 8 in the tube 6 can be expressed by the proportion of the area of the porous body 7. This numerical value points out the area which the part applicable to the porous body 7 occupies, observing the cross section of the location containing the hollow tube 6 and the porous body 7.
  • the ratio of the area of the porous body 7 in the tube 6 is preferably in the range of 5% to 95%.
  • the area ratio of the porous body 7 in the tube 6 is clearly 5 % Or more and 95% or less.
  • the more preferable lower limit of the ratio of the area of the porous body 7 in the tube 6 is 8%, and the still more preferable lower limit is 15%.
  • a more preferable upper limit is 90%, and a still more preferable upper limit is 85%.
  • the porous body 7 which consists of a foam (polyurethane foam) is shown by FIG. 4 as a reference example
  • the porous body 7 of this invention is a nonwoven fabric, ie, the aggregate
  • the porous body 7 is a structure which can measure a water absorption.
  • the air holding space 8 is maintained without being lost even in a state of being pinched and compressed between the door main body 2a and the door frame 4 when the seal member 1 is used.
  • the compressed porous body 7 in a cross section orthogonal to the longitudinal direction of the tube 6 in a use state of the seal member 1 (for example, a 30% compression state, ie, a state in which the dimension in the compression direction is reduced by 30%)
  • the cross-sectional area is 5% or more and 90% or less of the cross-sectional area of the hollow portion (including the portion occupied by the porous body 7 in the tube 6) which is a portion surrounded by the inner wall of the tube 6.
  • the area of the air holding space 8 in the use state of the seal member 1 is 10% or more and 95% or less of the cross-sectional area of the portion surrounded by the inner wall of the tube 6.
  • the ratio of the cross-sectional area of the porous body 7 to the cross-sectional area of the hollow portion of the tube 6 is 5% or more and 90% or less.
  • the volume occupancy of the porous body 7 in the hollow portion is 5% or more and 90% or less.
  • the porous body 7 does not necessarily have to be inserted over the entire length of the tube 6. Even if the porous body 7 is disposed only in a part of the hollow portion of the tube 6 in the longitudinal direction, the effect of improving the sound insulation can be obtained. .
  • the volume occupancy rate, the sound insulation and the like in that case will be described later.
  • the material of the porous body 7 of the present invention is a non-woven fabric, and the water absorption rate in the non-compressed state is 10% or more and 3000% or less.
  • the upper limit value of the water absorption rate is more preferably 2800%, still more preferably 2500%, still more preferably 2000%, particularly preferably 1600%.
  • the lower limit value of the water absorption rate is more preferably 12%, further preferably 13%.
  • the water absorption rate of the nonwoven fabric which comprises the porous body 7 was measured by the method similar to the elastomer material which comprises the tube 6 mentioned above.
  • the nonwoven fabric constituting the porous body 7 the bulk density is 10 kg / m 3 or more 150 kg / m 3 or less in the uncompressed state.
  • the compressive stress (25% compressive stress) for compressing the size of the non-woven fabric constituting the porous body 7 until the dimension in the compressive direction is reduced by 25% is 1 N / cm 2 or less, and the dimension in the compressive direction is reduced by 50%
  • the sound insulation of the seal member 1 or the like can be measured, for example, by the acoustic characteristic measurement system shown in FIGS. 5A and 5B.
  • the acoustic characteristic measurement system has two chambers, ie, a reverberation chamber 9 which is a first chamber, and a semi-anechoic chamber 10 or an anechoic chamber which is a second chamber.
  • the reverberation chamber 9 and the semi-anechoic chamber 10 are adjacent to each other, and share a part of the wall (partition 11).
  • the reverberation chamber 9 has an inner wall made of a reverberation plate such as a metal plate.
  • the semi-anechoic chamber 10 has a sound absorbing structure (a structure in which a suction member (not shown) is provided on substantially the entire inner wall) except the floor surface.
  • a chamber in which all the inner walls including the floor surface have a sound absorbing structure is called an anechoic chamber.
  • the second chamber of the present invention may be a semi-anechoic chamber 10 or an anechoic chamber.
  • the partition portion 11 is provided with an opening 12 for communicating the reverberation chamber 9 with the semi-anechoic chamber 10, and a test piece (seal in this example, as shown in FIG. 5B) is opposed to the opening 12.
  • a holding mechanism 13 is provided which holds the member 1) while compressing it.
  • the presence of the seal member 1 corresponds to the seal member of the conventional example described later, that is, the seal member having a configuration in which nothing is inserted into the hollow tube 6 by the holding mechanism 13. It is the result of measuring a sound insulation property in the state hold
  • the sound insulation performance of the seal member 1 can also be represented by a decibel average value of sound insulation of a specific frequency range (for example, 4000 Hz to 10000 Hz). In the same frequency range of the conventional sealing member of the configuration in which nothing is inserted into the hollow tube 6 by calculating the decibel average value of the sound shielding of the specific frequency range of the sealing member 1 of the present invention It is also possible to show the improvement of the sound barrier according to the invention by comparing it with the decibel average value of.
  • each seal member was determined in four steps as follows based on the improvement amount to the sound insulation of the seal member as a reference, and displayed in Tables 1 to 3 described later. ⁇ : 6 dB or more, :: 2 dB or more and less than 6 dB, ⁇ : 1 dB or more and less than 2 dB, ⁇ : less than 1 dB.
  • the tube 6 produced according to Patent Document 5 is made of an ethylene / ⁇ -olefin / nonconjugated polyene copolymer, and the water absorption rate in an uncompressed state is 0.49% The specific gravity in the state is 0.62.
  • the attachment portion is provided on a cylinder having an outer diameter of 19 to 22 mm and an inner diameter of about 15 to 16 mm in the non-compressed state, and the total length of the tube is 840 mm.
  • the seal member is held in a 30% compressed state as described above using, for example, the acoustic characteristic measurement system shown in FIGS. 5A and 5B.
  • FIG. 7A is in the non-compressed state
  • FIG. 7B is in the 30% compressed state (used state).
  • Table 1 Table 2 and FIGS. 8, 12, 14, 18, 21, and 24 show the sound insulation for sounds of various frequencies by the seal member having no porous body. According to this result, in the conventional example, the sound isolation for a high frequency of 2000 Hz or more is not sufficient, and the decibel average value of the sound isolation of 4000 Hz to 10000 Hz is 50.7 dB.
  • the seal member 1 of the reference example 1 will be described.
  • This sealing member 1 is shown in FIG. 4, and a porous body 7 having a square cross-sectional shape of 10 mm ⁇ 10 mm is inserted into the inside of the tube 6.
  • the material constituting the porous body 7 is polyurethane foam (trade name: Sealflex ESH (manufactured by Inoac Corporation)), the water absorption rate in the non-compressed state is 1400%, and the bulk density in the non-compressed state is 45 kg / m is 3. Also, the material has a 25% compressive stress of 0.52 N / cm 2 and a 50% compressive stress of 0.72 N / cm 2 .
  • the cross-sectional area of the porous body 7 in a use state of the seal member 1 in a cross section orthogonal to the longitudinal direction of the tube 6 is 60% of the cross-sectional area of the hollow portion (internal space) of the tube 6 Since the porous body 7 was arranged, the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 60%.
  • Table 1 and FIG. 8 show the sound interception to the sound of various frequencies of the use state of the seal member 1 in which the porous body 7 made of this material is inserted in the tube 6.
  • the sound insulation of the seal member 1 is good, and the sound insulation for high frequencies of 2000 Hz or more is particularly improved compared to the conventional example, and the average decibel value of the sound insulation between 4000 Hz and 10000 Hz is higher than that of the conventional example. It improved by 12.7 dB.
  • the porous body 7 which is a square of 10 mm ⁇ 10 mm in cross section is inserted into the inside of the tube 6.
  • the material constituting this porous body 7 is polyurethane foam (trade name: Color Foam ECS (manufactured by Inoac Corporation)), the water absorption rate in the non-compression state is 2742%, and the bulk density in the non-compression state is 22 kg / m is 3. Further, 25% compressive stress is 0.33 N / cm 2, 50% compression stress is a material of 0.35 N / cm 2.
  • the cross-sectional area of the porous body 7 in the used state of the seal member 1 is 60% of the cross-sectional area of the hollow portion of the tube 6 and the porous body 7 is disposed over the entire length of the tube 6, the contents of the tube 6
  • the volume occupancy of the porous body 7 to the product was 60%.
  • Table 1 and FIG. 8 show the sound interception for sounds of various frequencies in the use state of the seal member 1.
  • the sound insulation of the seal member 1 is better than that of the conventional example, and the decibel average value of the sound insulation of 4000 Hz to 10000 Hz is improved by 9.8 dB as compared with the conventional example.
  • a porous body 7 having a square cross-sectional shape of 10 mm ⁇ 10 mm is inserted into the inside of the tube 6.
  • the material constituting this porous body 7 is polyurethane foam (trade name: Calm Flex F-2 (manufactured by Inoac Corporation)), the water absorption rate in the non-compression state is 2310%, and the bulk density in the non-compression state is it is 25kg / m 3. Further, 25% compressive stress is 0.48 N / cm 2, 50% compression stress is a material of 0.5 N / cm 2.
  • the cross-sectional area of the porous body 7 in the used state of the seal member 1 is 60% of the cross-sectional area of the hollow portion of the tube 6 and the porous body 7 is disposed over the entire length of the tube 6, the contents of the tube 6
  • the volume occupancy of the porous body 7 to the product was 60%.
  • Table 1 and FIG. 8 show the sound interception for sounds of various frequencies in the use state of the seal member 1.
  • the sound insulation of the seal member 1 is good as compared with the conventional example, and the decibel average value of the sound insulation of 4000 Hz to 10000 Hz is improved by 9.9 dB as compared with the conventional example.
  • the inside of the tube 6 is filled with the porous body 7 made of flexible polyurethane foam.
  • the porous body 7 is formed as a non-flowing solid polyurethane foam by foaming the material in a fluid state before foaming into the inside of the tube 6 and then foaming.
  • the inside of the tube 6 is not completely blocked by the porous body 7, and an air holding space 8 exists between a part of the inner wall of the tube 6 and a part of the outer surface of the porous body 7.
  • the water absorption of the polyurethane foam constituting the porous body 7 in the uncompressed state after foaming is 665%, and the bulk density in the uncompressed state is 60 kg / m 3 .
  • the material has a 25% compressive stress of 0.12 N / cm 2 and a 50% compressive stress of 0.18 / cm 2 . Since the cross-sectional area of the porous body 7 in the used state of the sealing member 1 is 89% of the cross-sectional area of the hollow portion of the tube 6 and the porous body 7 is disposed over the entire length of the tube 6, the contents of the tube 6 The volume occupancy of the porous body 7 to the product was 89%.
  • Table 1 and FIG. 12 show the sound interception for sounds of various frequencies in the use state of the seal member 1. According to this seal member 1, better sound insulation is obtained as compared with the conventional example, and the decibel average value of the sound insulation of 4000 Hz to 10000 Hz is improved by 10.7 dB compared to the conventional example.
  • Example 1 In the seal member 1 of the first embodiment of the present invention shown in FIG. 13, the porous body 7 having a cross-sectional shape of 2 mm ⁇ 20 mm is inserted into the inside of the tube 6.
  • the material constituting the porous body 7 is a non-woven fabric produced by processing polypropylene by a meltblown method, the water absorption in the non-compressed state is 16%, and the bulk density in the non-compressed state is 31 kg / m 3 . Moreover, it is a material whose 50% compressive stress is 0.09 N / cm 2 with 25% compressive stress below the measurement lower limit (not measurable).
  • the cross-sectional area of the porous body 7 in the used state of the seal member 1 is 40% of the cross-sectional area of the hollow portion of the tube 6 and the porous body 7 is disposed over the entire length of the tube 6, the contents of the tube 6
  • the volume occupancy of porous body 7 to the product was 40%.
  • Table 1 and FIG. 14 show the sound interception for sounds of various frequencies in the use state of the seal member 1.
  • the sound insulation of the seal member 1 is good, and the sound insulation for high frequencies of 2000 Hz or more is particularly improved compared to the conventional example, and the average decibel value of the sound insulation between 4000 Hz and 10000 Hz is higher than that of the conventional example. It improved by 12.4 dB.
  • the porous body 7 is joined to the inside of the tube 6 by a method using ultrasonic vibration described later (see FIGS. 39A to 39B). ing.
  • the frequency of ultrasonic waves used in this method is usually 20 kHz or more and 3000 kHz or less, preferably 25 kHz or more and 1000 kHz or less.
  • the amount of energy given to the tube 6 and the porous body 7 is appropriate. And the handling of the porous body 7 is easy.
  • Example 2 In the seal member 1 of the second embodiment of the present invention shown in FIG. 15, the porous body 7 having a cross-sectional shape of 2 mm ⁇ 6.5 mm is inserted into the inside of the tube 6.
  • the material which comprises this porous body 7 is the same nonwoven fabric as Example 1.
  • the cross-sectional area of the porous body 7 in the used state of the sealing member 1 is 9% of the cross-sectional area of the hollow portion of the tube 6, and the porous body 7 is disposed over the entire length of the tube 6.
  • the volume occupancy of the porous body 7 to the product was 9%.
  • Table 1 and FIG. 14 show the sound interception for sounds of various frequencies in the use state of the seal member 1.
  • the sound insulation of the seal member 1 is better than that of the conventional example, and the decibel average value of the sound insulation of 4000 Hz to 10000 Hz is improved by 9.1 dB as compared with the conventional example.
  • the porous body 7 having a cross-sectional shape of 8 mm ⁇ 13 mm is inserted into the inside of the tube 6.
  • the material constituting this porous body 7 is a non-woven fabric (trade name: Tafnel oil blotter AR-65 (Mitsui Chemical Co., Ltd.)), the water absorption rate in the non-compression state is 203%, and the bulk density in the non-compression state is It is 70 kg / m 3 .
  • the material has a 25% compressive stress of 0.16 N / cm 2 and a 50% compressive stress of 2.2 N / cm 2 .
  • the porous body 7 having a square of 10 mm ⁇ 10 mm in cross section is inserted into the inside of the tube 6.
  • the material constituting the porous body 7 is a foamed rubber (trade name: Ept Sealer No. 685 (manufactured by Nitto Denko Corporation)), the water absorption rate in the non-compression state is 169%, and the bulk density in the non-compression state is 140 kg / m 3
  • the material also has a 25% compressive stress of 0.26 N / cm 2 and a 50% compressive stress of 0.54 N / cm 2 .
  • the cross-sectional area of the porous body 7 in the used state of the seal member 1 is 60% of the cross-sectional area of the hollow portion of the tube, and the porous body 7 is disposed over the entire length of the tube 6.
  • the volume occupancy of the porous body 7 to the above was 60%.
  • Table 1 and FIG. 18 show the sound interception for sounds of various frequencies in the use state of the seal member 1.
  • the sound insulation of the seal member 1 is good as compared with the conventional example, and the decibel average value of the sound insulation of 4000 Hz to 10000 Hz is improved by 12.0 dB as compared with the conventional example.
  • a porous body 7 having a rectangular cross-sectional shape of 10 mm ⁇ 15 mm is inserted into the inside of the tube 6.
  • the material constituting the porous body 7 is adjusted in the amount of the foaming agent to have a water absorption rate of 46.8% in the non-compressed state and a bulk density of 73 kg / m 3 in the non-compressed state.
  • the cross-sectional area of the porous body 7 in the used state of the seal member 1 is 80% of the cross-sectional area of the hollow portion of the tube 6 and the porous body 7 is disposed over the entire length of the tube 6, the contents of the tube 6
  • the volume occupancy of the porous body 7 to the product was 80%.
  • Table 1 and FIG. 18 show the sound interception for sounds of various frequencies in the use state of the seal member 1.
  • the sound insulation of the seal member 1 is good, and the sound insulation for high frequencies of 2000 Hz or more is particularly improved compared to the conventional example, and the average decibel value of the sound insulation between 4000 Hz and 10000 Hz is higher than that of the conventional example. It improved by 14.4 dB.
  • Comparative Example 1 In the seal member of Comparative Example 1 shown in FIG. 20, a porous body 7 having a circular cross-sectional shape of 10 mm in diameter is inserted into the inside of the tube 6. According to Patent Document 6, the material constituting the porous body 7 adjusts the amount of the foaming agent, and the water absorption rate in the non-compression state is 0.8%, and the bulk density in the non-compression state is 290 kg / m 3 .
  • Foam rubber EPT sponge (EPDM sponge) manufactured to be Further, 25% compressive stress is 4.4 N / cm 2, 50% compression stress is a material of 13.1N / cm 2.
  • the cross-sectional area of the porous body 7 in the used state of the seal member is 65% of the cross-sectional area of the hollow portion of the tube 6, and the porous body 7 is disposed over the entire length of the tube 6.
  • the volume occupancy of the porous body 7 to the above was 65%.
  • Table 1 and FIG. 21 show the sound interception for sounds of various frequencies in the use state of this seal member. According to this seal member, only the same sound insulation as in the seal member of the conventional example can be obtained, and in particular, the sound shield to high frequency of 2000 Hz or more is compared with the seal member 1 of Examples 1 to 3 and Reference Examples 1 to 6. Insufficiently, the decibel average value of the 4000 Hz to 10000 Hz sound insulation level is improved by only 0.5 dB as compared with the conventional example.
  • Comparative Example 2 In the sealing member of Comparative Example 2 shown in FIG. 22, the porous body 7 having a square of 10 mm ⁇ 10 mm in cross section is inserted into the inside of the tube 6.
  • the material constituting this porous body 7 is a foamed rubber (CR (chloroprene rubber) sponge square cord), the water absorption rate in the non-compression state is 1.6%, and the bulk density in the non-compression state is 310 kg / m 3 It is. Also, the material has a 25% compressive stress of 5.19 N / cm 2 and a 50% compressive stress of 13.2 N / cm 2 .
  • the cross-sectional area of the porous body 7 in the used state of the seal member is 66% of the cross-sectional area of the hollow portion of the tube 6 and the porous body 7 is disposed over the entire length of the tube 6
  • the volume occupancy of the porous body 7 to the above was 66%.
  • Table 1 and FIG. 21 show the sound interception for sounds of various frequencies in the use state of this seal member. According to this seal member, only the same sound insulation as in the seal member of the conventional example can be obtained, and in particular, the sound shield to high frequency of 2000 Hz or more is compared with the seal member 1 of Examples 1 to 3 and Reference Examples 1 to 6. Insufficient, the decibel average value of the 4000 Hz to 10000 Hz sound insulation level is 2.0 dB lower than that of the conventional example.
  • the porous body 7 made of soft polyurethane foam is filled in the inside of the tube 6 without a gap. That is, the porous body 7 is one in which the material in the fluid state before foaming is injected into the inside of the tube 6 and then foamed to form a non-flowing solid polyurethane foam. The inside of the tube 6 is completely closed by the porous body 7, and the air holding space 8 does not exist between the inner wall of the tube 6 and the outer surface of the porous body 7.
  • the water absorption in the non-compressed state after foaming of the polyurethane foam constituting the porous body 7 is 1268%, and the bulk density in the non-compressed state is 56 kg / m 3 .
  • the material also has a 25% compressive stress of 0.54 N / cm 2 and a 50% compressive stress of 0.8 / cm 2 .
  • the cross-sectional area of the porous body 7 in the used state of the seal member is 100% of the cross-sectional area of the hollow portion of the tube, and the porous body 7 is disposed over the entire length of the tube 6
  • the volume occupancy of the porous body 7 was 100%.
  • the sound insulation of the seal member 1 in use is shown in Table 1 and FIG. 24. The sound insulation is insufficient, and the decibel average value of the sound insulation between 4000 Hz and 10000 Hz is the conventional example. It is 3.9 dB lower than that.
  • Comparative Example 4 In the seal member 1 of Comparative Example 4 schematically shown in FIG. 25, a porous body 7 having a rectangular cross-sectional shape of 10 mm ⁇ 10 mm is arranged in line with the tube 6 outside the tube 6.
  • the material constituting this porous body 7 is the same polyurethane foam as the porous body 7 of Reference Example 3 (trade name: Calm Flex F-2 (manufactured by Inoac Corporation)), and the water absorption rate in the non-compressed state, the non-compressed state
  • the bulk density, 25% compressive stress, and 50% compressive stress in the state are all the same as in the porous body 7 of Reference Example 3.
  • the seal member 1 was compressed by 30% in a state where the porous member 7 was positioned on the sound generating unit side, and the sound shielding volume for sounds of various frequencies was measured. Since the porous body 7 is disposed on the outside of the tube 6, the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 0%. Table 1 and FIG. 24 show the measurement results of the sound shielding volume. According to this seal member 1, similarly to the conventional example, the sound isolation for high frequencies of 2000 Hz or more is insufficient, and the average decibel value of the sound isolation from 4000 Hz to 10000 Hz is only 0.4 dB better than the conventional example. Not.
  • Comparative Example 5 In Comparative Example 5 schematically shown in FIG. 26, the seal member 1 of Comparative Example 4 is compressed by 30% in a state where the porous body 7 is disposed on the opposite side of the sound producing portion, and the sound of various frequencies is generated. The shadow volume was measured. Since the porous body 7 is disposed on the outside of the tube 6, the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 0%. Table 1 and FIG. 24 show the measurement results of the sound shielding volume. According to this seal member 1, similarly to the conventional example, the sound isolation for high frequencies of 2000 Hz or more is insufficient, and the average decibel value of the sound isolation from 4000 Hz to 10000 Hz is only 0.4 dB better than the conventional example. Not.
  • the seal members of Examples 1 to 3 and Reference Examples 1 to 6 and Comparative Examples 1 to 3 described above have a configuration in which the porous body 7 is disposed along the entire length of the tube 6.
  • the inventor of the present invention does not arrange the porous body 7 over the entire length of the tube 6, but the configuration in which the porous body 7 is arranged only partially in the longitudinal direction of the tube 6 is a conventional example. It has been found that there may be a case where an excellent sound insulation effect can be obtained as compared with the seal members (FIGS. 7A and 7B).
  • the tubes 6 of Examples 4 to 13 and Reference Examples 7 to 13 and Comparative Examples 6 and 7 described below are hollow not open in a closed loop but open at both ends as schematically shown in FIGS. 27B to 27D.
  • Example 4 In the seal member 1 according to the fourth embodiment of the present invention, the porous body 7 having a cross-sectional shape of 2 mm ⁇ 10 mm is inserted into the hollow linear or curved tube 6 having the both end openings.
  • the material which comprises this porous body 7 is the same nonwoven fabric as Example 1 (FIG. 13).
  • the cross-sectional area of the porous body 7 in the used state of the sealing member 1 is 20% of the cross-sectional area of the hollow portion of the tube 6, and as shown in FIG.
  • the porous body 7 was disposed only in the inner portion, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 13.3%.
  • the porous body 7 having a cross-sectional shape of 2 mm ⁇ 10 mm is inserted into the hollow linear or curved tube 6 having openings at both ends.
  • the material which comprises this porous body 7 is the same nonwoven fabric as Example 1 (FIG. 13).
  • the cross-sectional area of the porous body 7 in the used state of the sealing member 1 is 20% of the cross-sectional area of the hollow portion of the tube 6, and although not shown, one end (one end) for the tube 6 having a total length of 840 mm.
  • the porous body 7 was disposed only in a portion within 280 mm from the above, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 6.7%.
  • the sound insulation of the seal member 1 in use with respect to sounds of various frequencies is good as compared with the conventional example, and the decibel average value of the sound insulation of 4000 Hz to 10000 Hz is improved by 2.6 dB as compared with the conventional example.
  • Table 2 The results are shown in Table 2.
  • the porous body 7 having a cross-sectional shape of 2 mm ⁇ 20 mm is inserted into the hollow linear or curved tube 6 having the both end openings.
  • the material which comprises this porous body 7 is the same nonwoven fabric as Example 1 (FIG. 13).
  • the cross-sectional area of the porous body 7 in the used state of the seal member 1 is 40% of the cross-sectional area of the hollow portion of the tube 6 and, as shown in FIG.
  • the porous body 7 was disposed only in the inner portion, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 26.7%.
  • Example 7 In the seal member 1 according to the seventh embodiment of the present invention, the porous body 7 having a cross-sectional shape of 2 mm ⁇ 5 mm is inserted into the hollow straight or curved tube 6 open at both ends.
  • the material which comprises this porous body 7 is the same nonwoven fabric as Example 1 (FIG. 13).
  • the cross-sectional area of the porous body 7 in the used state of the sealing member 1 is 10% of the cross-sectional area of the hollow portion of the tube 6, and as shown in FIG.
  • the porous body 7 was disposed only in the inner portion, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 6.7%.
  • Example 8 In the seal member 1 according to the eighth embodiment of the present invention, a porous body 7 having a cross-sectional shape of 2 mm ⁇ 2.5 mm is inserted into a hollow linear or curved tube 6 having openings at both ends.
  • the material which comprises this porous body 7 is the same nonwoven fabric as Example 1 (FIG. 13).
  • the cross-sectional area of the porous body 7 in the used state of the seal member 1 is 5% of the cross-sectional area of the hollow portion of the tube 6 and, as shown in FIG.
  • the porous body 7 was disposed only in the inner portion, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 3.3%.
  • a porous body 7 having a cross-sectional shape of 2 mm ⁇ 10 mm is inserted into a hollow linear or curved tube 6 having openings at both ends.
  • the material which comprises this porous body 7 is the same nonwoven fabric as Example 1 (FIG. 13).
  • the cross-sectional area of the porous body 7 in the used state of the sealing member 1 is 20% of the cross-sectional area of the hollow portion of the tube 6, and as shown in FIG.
  • the porous body 7 was disposed only in the inner portion, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 10%.
  • Example 10 In the seal member 1 according to the tenth embodiment of the present invention, the porous body 7 having a cross-sectional shape of 2 mm ⁇ 10 mm is inserted into the hollow straight or curved tube 6 open at both ends.
  • the material which comprises this porous body 7 is the same nonwoven fabric as Example 1 (FIG. 13).
  • the cross-sectional area of the porous body 7 in the used state of the seal member 1 is 20% of the cross-sectional area of the hollow portion of the tube 6, and as shown in FIG.
  • the porous body 7 was disposed only in the inner portion, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 5%.
  • the porous body 7 having a cross-sectional shape of 2 mm ⁇ 10 mm is inserted into the hollow straight or curved tube 6 having openings at both ends.
  • the material which comprises this porous body 7 is the same nonwoven fabric as Example 1 (FIG. 13).
  • the cross-sectional area of the porous body 7 in the used state of the sealing member 1 is 20% of the cross-sectional area of the hollow portion of the tube 6, and although not shown, with respect to the tube 6 having a total length of 840 mm
  • the porous body 7 was arranged only in the above, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 2.5%.
  • a porous body 7 having a cross-sectional shape of 10 mm ⁇ 10 mm is inserted into a hollow linear or curved tube 6 having openings at both ends.
  • the material which comprises this porous body 7 is the same nonwoven fabric as Example 1 (FIG. 13).
  • the cross-sectional area of the porous body 7 in the used state of the sealing member 1 is 60% of the cross-sectional area of the hollow portion of the tube 6, and as shown in FIG.
  • the porous body 7 was disposed only in the inner portion, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 15%.
  • the porous body 7 having a cross-sectional shape of 8 mm ⁇ 13 mm is inserted into the hollow straight or curved tube 6 having openings at both ends.
  • the material which comprises this porous body 7 is the same nonwoven fabric as Example 3 (FIG. 15).
  • the cross-sectional area of the porous body 7 in the used state of the sealing member 1 is 55% of the cross-sectional area of the hollow portion of the tube 6, and although not shown, with respect to the tube 6 having a total length of 840 mm
  • the porous body 7 was arranged only in the above, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 6.9%.
  • the porous body 7 having a cross-sectional shape of 10 mm ⁇ 10 mm is inserted into the hollow linear or curved tube 6 having openings at both ends.
  • the material constituting this porous body 7 is the same polyurethane foam as in Reference Example 1 (FIG. 4).
  • the cross-sectional area of the porous body 7 in the used state of the sealing member 1 is 60% of the cross-sectional area of the hollow portion of the tube 6, and as shown in FIG.
  • the porous body 7 was disposed only in the inner portion, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 40%.
  • the porous body 7 having a cross-sectional shape of 10 mm ⁇ 10 mm is inserted into the hollow linear or curved tube 6 open at both ends.
  • the material constituting this porous body 7 is the same polyurethane foam as in Reference Example 1 (FIG. 4).
  • the cross-sectional area of the porous body 7 in the used state of the sealing member 1 is 60% of the cross-sectional area of the hollow portion of the tube 6, and although not shown, for the tube 6 with a total length of 840 mm
  • the porous body was arranged only in the above, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 20%.
  • the porous body 7 having a cross-sectional shape of 10 mm ⁇ 10 mm is inserted into the hollow linear or curved tube 6 having the both end openings.
  • the material constituting this porous body 7 is the same polyurethane foam as in Reference Example 1 (FIG. 4).
  • the cross-sectional area of the porous body 7 in the used state of the seal member 1 is 60% of the cross-sectional area of the hollow portion of the tube 6, and although not shown, with respect to the tube 6 having a total length of 840 mm
  • the porous body 7 was arranged only in the above, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 7.5%.
  • the porous body 7 having a cross-sectional shape of 10 mm ⁇ 10 mm is inserted into the hollow linear or curved tube 6 having openings at both ends.
  • the material constituting this porous body 7 is the same polyurethane foam as in Reference Example 1 (FIG. 4).
  • the cross-sectional area of the porous body 7 in the used state of the seal member 1 is 60% of the cross-sectional area of the hollow portion of the tube 6, and although not shown, for the tube 6 having a total length of 840 mm
  • the porous body 7 was arranged only in the above, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 2.5%.
  • the porous body 7 having a cross-sectional shape of 10 mm ⁇ 10 mm is inserted into the hollow linear or curved tube 6 open at both ends.
  • the material constituting this porous body 7 is the same polyurethane foam as in Reference Example 3 (FIG. 10).
  • the cross-sectional area of the porous body 7 in the used state of the seal member 1 is 60% of the cross-sectional area of the hollow portion of the tube 6, and although not shown, with respect to the tube 6 having a total length of 840 mm
  • the porous body 7 was arranged only in the above, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 7.5%.
  • a porous body 7 having a cross-sectional shape of 10 mm ⁇ 10 mm is inserted into the hollow linear or curved tube 6 having openings at both ends.
  • the material constituting this porous body 7 is the same polyurethane foam as in Reference Example 2 (FIG. 9).
  • the cross-sectional area of the porous body 7 in the used state of the seal member 1 is 60% of the cross-sectional area of the hollow portion of the tube 6, and although not shown, with respect to the tube 6 having a total length of 840 mm
  • the porous body 7 was arranged only in the above, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 7.5%.
  • the porous body 7 having a cross-sectional shape of 10 mm ⁇ 10 mm is inserted into the hollow linear or curved tube 6 having openings at both ends.
  • the material constituting this porous body 7 is the same foamed rubber as in Reference Example 5 (FIG. 17).
  • the cross-sectional area of the porous body 7 in the used state of the seal member 1 is 60% of the cross-sectional area of the hollow portion of the tube 6, and although not shown, with respect to the tube 6 having a total length of 840 mm
  • the porous body 7 was arranged only in the above, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 7.5%.
  • Comparative Example 6 In the seal member 1 of Comparative Example 6, the porous body 7 having a cross-sectional shape of 2 mm ⁇ 10 mm is inserted into the hollow linear or curved tube 6 open at both ends.
  • the material which comprises this porous body 7 is the same nonwoven fabric as Example 1 (FIG. 13).
  • the cross-sectional area of the porous body 7 in the used state of the sealing member 1 is 20% of the cross-sectional area of the hollow portion of the tube 6, and although not shown, one end (one end) for the tube 6 having a total length of 840 mm.
  • the porous body 7 was disposed only in a portion within 53 mm from the above, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 1.3%.
  • the sound insulation of the use state of the sealing member 1 against sound of various frequencies is insufficient in sound insulation particularly for high frequencies of 2000 Hz or more, and the decibel average value of sound insulation of 4000 Hz to 10000 Hz Is only 0.4 dB better than the conventional example.
  • Table 2 The results are shown in Table 2.
  • Comparative Example 7 In the seal member 1 of Comparative Example 7, the porous body 7 having a cross-sectional shape of 2 mm ⁇ 10 mm is inserted into the hollow linear or curved tube 6 having openings at both ends.
  • the material which comprises this porous body 7 is the same nonwoven fabric as Example 1 (FIG. 13).
  • the cross-sectional area of the porous body 7 in the used state of the sealing member 1 is 20% of the cross-sectional area of the hollow portion of the tube 6, and although not shown, with respect to the tube 6 having a total length of 840 mm
  • the porous body 7 was arranged only in the above, and the volume occupancy of the porous body 7 with respect to the internal volume of the tube 6 was 1.3%.
  • the frequency of the high frequency noise (about 2000 Hz to about 16000 Hz) generated by the electric motor particularly used for the electric car and the hybrid car Demonstrates excellent sound insulation.
  • the excellent sound insulation can be obtained by Examples 1 to 13 and Reference Examples 1 to 13 because the sound absorption effect by the porous body 7 and the vibration damping by air in the air holding space 8 work together. is there.
  • the porous body is not provided, although there is a vibration damping effect due to the air in the tube 6, there is no sound absorbing effect by the porous body 7, so sufficient sound insulation can not be obtained.
  • Comparative Example 3 in which the air holding space does not exist in the tube 6, although there is a sound absorbing effect by the porous body 7, there is no vibration damping effect by the air in the tube 6, so sufficient sound insulation can not be obtained.
  • Comparative Examples 4 and 5 in which the porous body 7 is located outside the tube 6, the vibration of air is transmitted through the side of the porous body 7 located in the open space, so The sound absorbing effect of the porous body 7 can be applied to only a small portion, and sufficient sound insulation can not be obtained.
  • the material of the porous body 7 is not appropriate in Comparative Examples 1 and 2 in which sufficient sound insulation can not be obtained. That is, when the materials of Comparative Examples 1 and 2 are examined again, it is understood that the bulk density is higher than those of Examples 1 to 13 and Reference Examples 1 to 13. This means that the high density of the porous body 7 means that the total amount of the pores in a constant cross-sectional area of the porous body 7 is small, and the smaller the number of the pores, the smaller the sound absorbing effect. Therefore, in order to realize high sound insulation, it is preferable that the density of the porous body 7 be small.
  • the bulk density is preferably 150 kg / m 3 or less.
  • the material strength of the porous body 7 may be reduced, which may make processing and mounting difficult, so the bulk density is preferably 10 kg / m 3 or more.
  • the water absorption rate of the material constituting the porous body 7 it is considered that high sound insulation can not be obtained because the higher the water absorption rate, the more continuous pores, and the lower the water absorption rate, the less continuous pores.
  • the water absorption rates of Examples 1 to 13 and Reference Examples 1 to 13 and Comparative Examples 1 and 2 are compared, it is considered that sufficient sound insulation may not be obtained when the water absorption rate is 1.6% or less.
  • the water absorption be approximately 10% or more.
  • the weight may increase due to water absorption of water entering from the gap, or the continuous sound holes may be blocked and the original sound insulation of the sealing member of the present invention may not be obtained.
  • the water absorption rate is preferably 3000% or less.
  • the 25% compressive stress of the porous body 7 of the seal member 1 with excellent sound insulation was about 1 N / cm 2 or less .
  • the 50% compressive stress of the porous body 7 of the seal member 1 from which excellent sound insulation was obtained was approximately 2.5 N / cm 2 or less.
  • bulk density is preferably 10 kg / m 3 to 150 kg / m 3 and water absorption is 10% to 3000%, 25 % compression stress 1N / cm 2 or less, it satisfies the condition of 50% compression stress 2.5 N / cm 2 or less.
  • water absorption is 10% to 3000%, 25 % compression stress 1N / cm 2 or less, it satisfies the condition of 50% compression stress 2.5 N / cm 2 or less.
  • the sound insulation of the sealing member 1 of this invention was demonstrated, characteristics other than sound insulation are demonstrated below.
  • weight reduction is required for the door for vehicles and the door for buildings which are the main applications of the seal member 1 of the present invention.
  • the tube 6 of the seal member 1 of the present invention is similar to that of the conventional example, and the weight of the seal member 1 is increased by the amount of the porous body 7 inserted into the tube 6. Therefore, it is preferable that this porous body 7 be as light as possible.
  • the density of the porous body 7 is small. Leads to the suppression of the increase in weight.
  • the sealing member 1 of the present invention since the porous body 7 to be inserted into the tube 6 does not need to be inserted in advance in the waterproof tube etc., the manufacturing process of the sealing member 1 is not complicated and the number of parts is also increased. Absent.
  • the porous body 7 is formed of a material having a small compressive stress as described above, the attachment of the porous body 7 and the compression at the time of using the seal member 1 can be easily performed, and the workability is good.
  • the seal reliability heat resistance and weather resistance
  • is good because it can be easily adhered to the outer peripheral edge portions 2a and 4a and the door frames 3a and 5a with a small force.
  • Examples 4 to 13 and Reference Examples 7 to 13 of the present invention as shown in FIG. 27A, the porous body 7 is not arranged over the entire length of the tube 6, but as shown in FIGS. Even in the configuration in which the porous body 7 is inserted only partially in the longitudinal direction, the effect of improving the sound insulation is obtained as compared to the conventional seal member having no porous body as shown in FIG. 27E. .
  • sound insulation comparable to that of Examples 1 to 3 and Reference Examples 1 to 6 in which the porous body 7 is disposed over the entire length of the tube 6 is realized.
  • the manufacturing cost can be kept low, and the overall weight of the seal member 1 can be kept low and the weight can be reduced. Contribute to the various effects involved.
  • Comparative Examples 6 and 7 since the ratio (volume occupancy) of the porous body 7 to the internal volume of the tube 6 is too small, the sound absorbing effect of the porous body 7 does not reach, and sufficient sound insulation is obtained. Absent.
  • the volume occupancy of the porous body 7 is about 2.5 to 89%. Is preferable.
  • At least the porous body 7 is at least in the longitudinal direction of the tube 6. It is understood that it is preferable to arrange so as to occupy a range of 4% or more of the total length of the tube 6.
  • a hollow straight or curved tube 6 with both ends open as shown in FIGS. 27A to 27E is used, but this is a closed one as shown in FIG. It may constitute a part of the looped tube 6X.
  • a pair of tubes one tube 6a and another tube 6b
  • a corner joint 6c to form a loop-shaped tube body 6X which is a composite member.
  • one or both of the pair of tubes 6a and 6b are partially inserted with the porous body 7 in the longitudinal direction as described above, as in Examples 4 to 13 and Reference Examples 7 to 13.
  • a linear or curved seal member 1 can be constructed.
  • the upper tube 6a located at the upper (ceiling side) and the lower tube 6b located at the lower (floor side) are joined when mounted.
  • the porous body 7 is at least partially disposed as in Examples 10 to 26. It is particularly preferable to improve the sound insulation.
  • the porous body 7 may be disposed at least partially in the lower tube 6b to improve the sound insulation, or the porous body 7 is not disposed in the lower tube 6b far from the occupant's ear. Further reduction and weight reduction may be achieved.
  • the tube (e.g., the upper tube 6a) to be joined to another tube (e.g., the lower tube 6b) via the corner joint 6c is generally open at both ends for convenience of the molding and joining process.
  • a seal member including such a tube has sound leakage from the open end of the tube.
  • the sound leakage from the open end is suppressed by the porous body 7. Looking at Table 2, when at least a part of the porous body 7 exists within a distance of 33% of the total length of the tube from the open end, the effect of the sound insulation improvement is obtained Can be seen.
  • the porous body 7 is a loop-shaped tube which is a composite member as shown in FIG. 28 even in the closed loop-like seal member 1 as shown in FIG.
  • the present invention is also effective in the sealing member 1 which is a part constituting a part of the body 6X and which is a hollow straight or curved tube 6a having an opening at both ends.
  • the seal member 1 of the present invention described above is not limited to the configuration attached to the outer peripheral edge portion of the vehicle door main body or the building door main body, and may be attached to the inside of the door frame.
  • the seal member 1 of the present invention is attached to the outer peripheral edge of a storage portion such as a vehicle drive device, for example, a gasoline engine of an automobile or an electric motor, and is pinched and compressed with a housing frame. May be sealed.
  • a storage portion such as a vehicle drive device, for example, a gasoline engine of an automobile or an electric motor
  • the present invention can be used in various members that require a seal such as an electric product, and the application range thereof is not limited.
  • the porous body 7 is disposed inside the hollow tube body 6X, which is a composite member configured by joining a plurality of tubes 6a and 6b (parts) via the joint 6c. Is a method for manufacturing the seal member 1 of FIG.
  • the hollow tube body 6X which is a composite member
  • a plurality of tubes which are hollow parts are joined through joints.
  • one tube is fitted to one end of a rod-like (cylindrical) core for forming a hollow portion of a joint
  • the other tube is fitted to the other end of the core.
  • an unvulcanized rubber layer or a resin layer is formed so as to cover the outer periphery of the core, and the rubber layer is bonded by vulcanization by heat and pressure, or the resin layer is formed by heat and pressure and subsequent cooling and pressure.
  • a joint made of an elastically deformable vulcanized rubber layer or a resin layer is formed.
  • the porous body 7 described above is previously inserted into the tubes 6a and 6b. As shown, the porous body 7 is fixed to the inner surface of the tube. Then, the tubes 6a and 6b into which the porous body 7 is inserted are fitted and attached to both ends of the curved rod-like (cylindrical) core 16 shown in FIG. 30 (FIG. 31). At this time, it is preferable that the porous body 7 is not in contact with the core 16.
  • an unvulcanized rubber sheet or a thermoplastic resin sheet is wound around the outer periphery of the core 16 to which the tubes 6a and 6b to which the porous body 7 is inserted and fixed are attached.
  • the core 16 in a state in which the tubes 6a and 6b are attached and the unvulcanized rubber sheet or the resin sheet is wound is disposed in the cavity 17a of the mold 17.
  • the mold 17 is set in the press 18, and the rubber is vulcanized by heating and pressing, or by heating and pressing followed by cooling and pressing.
  • the resin sheet is heat-welded to form a joint 6c made of a vulcanized rubber layer or a resin layer.
  • heating condition in the case of forming a joint 6c by vulcanizing a rubber for example, heating at 170 ° C. for 15 minutes, heating at 180 ° C. for 8 minutes, heating at 190 ° C. for 4 minutes, etc. may be mentioned.
  • heating conditions in the case of solidifying a thermoplastic resin and forming joint 6c preheating 10 minutes at 200 ° C, heating pressurization 5 minutes, cooling pressurization 5 minutes etc. are mentioned.
  • the slit portion is formed in advance from the slit portion 19 of the joint 6c formed in advance by a convex portion (not shown) or the like provided on the mold. If not formed, a part of the joint 6c is cut away to form the slit portion 19, and then the core 16 is taken out from the slit portion 19.
  • a tube body 6X of a configuration in which the tubes 6a and 6b are joined via the joint 6c is completed.
  • the core 16 to which the tubes 6a and 6b to which the porous body 7 is inserted and fixed in advance is attached is disposed in the cavity 20a of the mold 20 of the injection molding apparatus shown in FIG. Then, molten unvulcanized rubber or resin is injected into the cavity 20a, and the inside of the cavity 20a and the outside of the core 16 are filled with the molten unvulcanized rubber or resin. Then, the injected unvulcanized rubber or resin is vulcanized or solidified to form a joint 6c made of an elastically deformable vulcanized rubber layer or a resin layer. After that, as shown in FIGS. 34 to 35, the tubes 16a and 6b are jointed as shown in FIG. 36 by removing the core 16 from the slit portion 19 of the joint 6c as shown in FIGS. The tube body 6X of the structure joined via 6c is completed.
  • the porous body 7 is joined and fixed to the inner surface of the tube 6 as shown in FIG.
  • the sound insulation is further improved.
  • the vibration absorbing effect of the porous body 7 is enhanced by fixing the porous body 7 and making it less likely to move or vibrate.
  • the porous body 7 is fixed in the vicinity of the slit portion 19 Since the porous body 7 is surely positioned at the position where the sound absorbing action is particularly desired, the sound insulation effect of the sealing member can be efficiently obtained.
  • polyurethane foam, foamed rubber, non-woven fabric, and the like can be mentioned as the material of the porous body 7 capable of achieving good sound insulation under appropriate conditions.
  • the bonding strength is weak, and the effect of the sound insulation improvement can not be obtained due to the porous body 7 being fixed inside the tube 6 described above. May melt and lose porosity and sound insulation.
  • the material of the porous body 7 is the same or similar material as the material of the tube 6, it can be easily joined with high reliability by a method such as heat fusion.
  • the resin members made of the same or similar resin material have close melting temperatures, and strong heat fusion is realized by heating to a temperature near the melting temperatures. Further, as disclosed in Patent Document 7, it is conceivable to improve the bonding strength by defining the surface roughness of the bonding surface of members (rubber member and resin member) to be bonded to each other.
  • the reliability by thermal welding is not high because the material is not the same as or similar to the material of the tube 6 (for example, crosslinked rubber).
  • prescribed roughness it is difficult to apply the method of patent document 7 and to perform favorable joining.
  • the resin adhesive layer is interposed between the resin material (weather strip) and the non-woven fabric, the weather strip is bonded to the resin adhesive layer, and the non-woven fabric is bonded to the resin adhesive layer. It has been proposed to indirectly strongly bond the weather strip and the non-woven fabric. However, this method requires a resin adhesive layer, which causes problems such as the manufacturing cost, the complexity of the manufacturing process, and the enlargement of the joint portion.
  • the non-woven fabric is composed of a plurality of materials, if the melting peak temperature of at least one material is 100 ° C. or more and 200 ° C. or less, preferably 110 ° C. or more and 190 ° C. or less, more preferably 120 or more and 180 ° C.
  • the non-woven fabric is made of a material containing polyethylene or polypropylene.
  • polypropylene produced by the melt-blown method of Mitsui Chemical Co., Ltd. used in Mystic White (trade name, material: polyethylene, melting peak temperature: 148 ° C.) of Examples 1 to 2 and 4 to 12 of Krypton Co., Ltd.
  • Non-woven fabric material: polypropylene, melting peak temperature: 162 ° C.
  • TAFNER oil blotter AR-65 trade name, material: polypropylene, melting peak temperature: 169 ° C.
  • Thinsulate (trade name, material: polypropylene (melting peak temperature: 166 ° C.) + Polyester (melting peak temperature:> 230 ° C.) etc. of 3M Japan Co., Ltd. are suitably used as the material of the non-woven fabric. Measurement is based on the method of measuring the transition temperature of plastic specified in JIS K Differences scanning calorimetry (DSC), weighing was carried out by heating at a heating rate of 10 ° C. / sec in the range of 30 ⁇ 230 ° C. A sample of about 5 mg.
  • the tube 6 joined to the non-woven fabric is preferably made of a material containing a foamed ethylene-propylene-diene rubber, a foamed chloroprene rubber, and a foamed EVA (ethylene-vinyl acetate copolymer resin). More specifically, synthetic rubbers such as EPDM (ethylene-propylene-diene rubber) described above are generally used as the material of the tubes 6a and 6b, but the material is not limited thereto.
  • the tubes 6a and 6b and the joint 6c may be formed of the same material, but may be formed of different materials, and the material of the joint 6c may be EPDM (ethylene-propylene-diene rubber) as described above.
  • Synthetic rubbers and olefin-based thermoplastic elastomers for example, Milastomer (trade name) of Mitsui Chemicals, Inc.) can be used.
  • FIGS. 39A and 39B An example of ultrasonic welding in the method according to the present invention is shown in FIGS. 39A and 39B.
  • an ultrasonic welding machine 21 such as an ultrasonic stapler of Suzuki Motor Corporation SUH-30 (trade name) (oscillation frequency 60 kHz)
  • the opening end of the tube 6 The horn 21a is made to enter and abut against the porous body (non-woven fabric) 7, and the tip 21b is abutted on the outer surface of the tube 6 at a position overlapping the porous body 7.
  • ultrasonic vibration is applied to the non-woven fabric 7 from the horn 21a while heating while pressurizing the tube 6 and the non-woven fabric 7 by the horn 21a and the tip 21b.
  • the material whose melting peak temperature of the non-woven fabric 7 is 100 ° C. or more and 200 ° C. or less melts or softens, and is firmly bonded to the tube 6 made of the crosslinked rubber.
  • the porous body (non-woven fabric) 7 is disposed on the inner surface of the tube 6, the porous body 7 is bonded to the inside of the tube 6 using ultrasonic vibration.
  • the frequency of the ultrasonic wave used in this method is usually 20 kHz or more and 3000 kHz or less, preferably 25 kHz or more and 1000 kHz or less.
  • the amount of energy given to the tube 6 and the porous body 7 is appropriate. And the porous body 7 is easy to handle.
  • Example 3 The inventors of the present invention joined by using the same material as in Example 1 while changing the conditions of ultrasonic welding, and the results are shown in Table 3. From this table, it can be seen that it is preferable to apply ultrasonic vibration while pressing the nonwoven fabric 7 at a pressure of 1.0 MPa or more for 0.7 seconds or more. In particular, when ultrasonic vibration is applied while pressing the non-woven fabric 7 under the condition that the product of pressure and pressing time is larger than 1.75 [MPa ⁇ sec], it is understood that good bonding can be performed. In Table 3 below, the product of the pressure and the pressurizing time is 1.75 when the pressure is 2.5 MPa and the pressurizing time is 0.7 seconds.
  • a force gauge not shown for example, force gauge AD-4932A-50N from A & D Inc.
  • force gauge AD-4932A-50N from A & D Inc.
  • the force applied when the non-woven fabric 7 was joined was measured by a force gauge, and the pressure was determined by dividing it by the area of the portion sandwiched by the horn 21a and the tip 21b.
  • the area of the portion sandwiched by the horn 21a and the chip 21b is substantially the same as the area of the terminal portion of the chip 21b (14.45 mm 2 in one example).
  • FIG. 40A the nonwoven fabric 7 which is a porous body as shown to FIG. 40B is inserted in the inside of the tube 6a which consists of crosslinked rubber and has the air release hole 23.
  • the nonwoven fabric 7 is arrange
  • a small ultrasonic welder 21 is prepared, and the horn of the ultrasonic welder 21 contacts or opposes the non-woven fabric 7 inserted into the tube 6a through the air vent hole 23,
  • the ultrasonic welding machine 21 is disposed so that the tip facing the horn supports the surface (outside surface) opposite to the surface (inner surface) on which the non-woven fabric 7 of the tube 6a is placed. Therefore, as in the process shown in FIG. 39B, ultrasonic vibration is applied while pressing the non-woven fabric 7 against the inner surface of the tube 6 with the horn and the tip. Thereby, as shown in FIG.
  • the non-woven fabric 7 is ultrasonically welded to the inner surface of the tube 6 and is firmly fixed to such an extent that it does not separate even if it is pulled. Thereafter, similar to the process shown in FIGS. 31 to 37 or FIG. 38, the joint is connected to another tube 6b via the joint 6c (see FIG. 41).
  • the nonwoven fabric 7 is arrange
  • ultrasonic vibration is applied while pressing the non-woven fabric 7 against the inner surface of the tube 6 with a horn and a tip, similarly to the process shown in FIG. It is firmly joined to the inner surface of the tube 6.
  • the seal member 1 similar to the configuration shown in FIG. 41 is completed.
  • the non-woven fabric 7 can be firmly joined to the inner surface of the tube 6a by ultrasonic welding, and the sound insulation effect can be enhanced. Since joining can be performed in a very short time (in the example shown in Table 3, the shortest is less than 1 second) using a general ultrasonic welding machine 21, the working efficiency is very good. The operation is very simple, just by bringing the horn of the ultrasonic welding machine 21 into contact with the non-woven fabric 7 through a known air vent 23 generally provided in the tube 6a. Furthermore, ultrasonic welding is possible if ultrasonic vibration and pressure can be applied to the nonwoven fabric 7 through a part of the tube 6a, even if the horn does not directly contact the nonwoven fabric 7. As described above, since the manufacturing process is simple and the working time is short and there is no need to use an adhesive layer or the like, the manufacturing cost of the seal member 1 can be extremely reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Sealing Material Composition (AREA)

Abstract

L'invention concerne : un procédé de production d'un élément d'étanchéité, qui présente une résistance thermique élevée, une résistance aux intempéries et une isolation phonique en plus d'être facile à produire et pour lequel un poids accru peut être limité ; et un procédé de liaison d'éléments. Un second élément 7, obtenu à partir d'un tissu non tissé contenant un matériau pour lequel la température de pic de fusion est de 100 °C à 200 °C, telle que mesurée par calorimétrie différentielle à balayage conformément aux méthodes de test pour des températures de transition des matières plastiques stipulés dans le JIS K 7121, est lié à un premier élément 6 qui est constitué d'un caoutchouc réticulé au moyen d'un soudage par ultrasons.
PCT/JP2018/024818 2017-06-30 2018-06-29 Procédé de production d'élément d'étanchéité et procédé de liaison d'éléments Ceased WO2019004432A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5820434A (ja) * 1981-07-30 1983-02-05 Okuto:Kk 伸縮テ−プ製造装置
JPH0275316U (fr) * 1988-11-29 1990-06-08
JPH111680A (ja) * 1997-06-12 1999-01-06 Uchiyama Mfg Corp ガスケット材
JP2003094952A (ja) * 2001-09-19 2003-04-03 Shigeru Nagano ウェザーストリップシールド機構
JP2005035461A (ja) * 2003-07-17 2005-02-10 Toyo Tire & Rubber Co Ltd ウエザストリップの型成形部構造及びウエザストリップ
JP2016142449A (ja) * 2015-02-02 2016-08-08 パナソニック株式会社 ガスケットおよびそのガスケットを用いた断熱構造体

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5820434A (ja) * 1981-07-30 1983-02-05 Okuto:Kk 伸縮テ−プ製造装置
JPH0275316U (fr) * 1988-11-29 1990-06-08
JPH111680A (ja) * 1997-06-12 1999-01-06 Uchiyama Mfg Corp ガスケット材
JP2003094952A (ja) * 2001-09-19 2003-04-03 Shigeru Nagano ウェザーストリップシールド機構
JP2005035461A (ja) * 2003-07-17 2005-02-10 Toyo Tire & Rubber Co Ltd ウエザストリップの型成形部構造及びウエザストリップ
JP2016142449A (ja) * 2015-02-02 2016-08-08 パナソニック株式会社 ガスケットおよびそのガスケットを用いた断熱構造体

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