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WO-2026094876-A1 - VENTILATION MEMBER AND MEMBER SUPPLY ASSEMBLY

WO2026094876A1WO 2026094876 A1WO2026094876 A1WO 2026094876A1WO-2026094876-A1

Abstract

This ventilation member comprises: a porous film comprising a fluorine-free thermoplastic resin as a main component; and an adhesive layer bonded to the porous film. In the adhesive layer, the content ratio of a specific component having an HSP value for which the absolute value of the difference from the HSP value of the thermoplastic resin is 8.5 MPa 0.5 or less is less than 0.1 wt%. The member supply assembly comprises: a ventilation member disposed on a face of a target, the face having an opening; and a base material sheet having the ventilation member disposed on a surface thereof. The porous film has a shape such that the film covers the opening when disposed on the face.

Inventors

  • TESHIMA YUTAKA
  • NISHIWAKI MASATAKA
  • FUKUSHIMA TAMAO

Assignees

  • 日東電工株式会社

Dates

Publication Date
20260507
Application Date
20251027
Priority Date
20241101

Claims (10)

  1. A porous film containing a thermoplastic resin that does not contain fluorine as its main component, The porous film comprises an adhesive layer bonded to it, The content of a specific component in the adhesive layer having an HSP value such that the difference from the HSP value of the thermoplastic resin is 0.5 or less in absolute terms is 8.5 MPa, is less than 0.1% by weight. Ventilation component.
  2. The adhesive layer comprises at least one selected from the group consisting of terpene-based tackifiers and acrylic oligomers. The ventilation member according to claim 1.
  3. The adhesive layer includes a first adhesive layer bonded to the first main surface of the porous film and a second adhesive layer bonded to the second main surface of the porous film. The ventilation member according to claim 1.
  4. The porous film has a breathable region where the adhesive layer is not bonded, and the area of the breathable region is 40 mm² or less. The ventilation member according to claim 1.
  5. The thermoplastic resin comprises at least one selected from the group consisting of polyolefin resins, polyester resins, and polyimide resins. The ventilation member according to claim 1.
  6. The thermoplastic resin comprises at least one selected from the group consisting of polyolefin resins and polyester resins. The ventilation member according to claim 1.
  7. The thermoplastic resin includes a polyolefin resin. The ventilation member according to claim 1.
  8. The porous film is a stretched film. The ventilation member according to claim 1.
  9. The porous film further comprises a breathable support material laminated on the aforementioned porous film, The ventilation member according to claim 1.
  10. A component supply assembly comprising a ventilation member disposed on the surface of an object having an opening, and a base sheet on which the ventilation member is disposed, The ventilation member is the ventilation member described in claim 1, The porous film has a shape that covers the opening when placed on the surface. Component supply assembly.

Description

Ventilation member and member supply assembly This invention relates to a ventilation member and a member supply assembly. Porous films made of fluororesin are used in a variety of applications, including filters, sound-transmitting membranes, ventilation membranes, and diaphragms. Porous films that do not contain fluorine have also been proposed for these applications. For example, Patent Document 1 discloses a microporous biaxially oriented olefin resin film having micropores and containing an olefin resin, wherein the puncture strength is 0.7 N or higher and the air permeability is 75 to 400 s/100 mL. Figure 1 is a schematic cross-sectional view showing an example of a ventilation member of the present invention.Figure 2 is a schematic cross-sectional view showing a modified example 1 of the ventilation member.Figure 3 is a schematic cross-sectional view showing an example of a porous film.Figure 4 is a schematic cross-sectional view showing an example of a film member.Figure 5 is a schematic cross-sectional view showing a modified example 2 of the ventilation member.Figure 6 is a schematic cross-sectional view showing a modified example 3 of the ventilation member.Figure 7 is a schematic cross-sectional view showing a modified example 4 of the ventilation member.Figure 8 is a schematic cross-sectional view showing a modified example 5 of the ventilation member.Figure 9 is a schematic cross-sectional view showing an example of a component supply assembly of the present invention.Figure 10 is a schematic cross-sectional view showing a modified example 1 of the component supply assembly.Figure 11 is a schematic cross-sectional view showing a modified example 2 of the component supply assembly.Figure 12 is a schematic cross-sectional view showing a sample body for evaluating the air permeability of a porous film using a measuring jig.Figure 13 illustrates the changes in a porous film over time when a durability test was conducted on a conventional ventilation member.Figure 14A shows the results of observing region A in the cross-section of the ventilation member of Example 1 using SEM 500 hours after the start of the durability test.Figure 14B shows the results of observing region B in the cross-section of the ventilation member of Example 1 using SEM 500 hours after the start of the durability test.Figure 15A shows the results of observing region A in the cross-section of the ventilation member of Comparative Example 1 using SEM 500 hours after the start of the durability test.Figure 15B shows the results of observing region B in the cross-section of the ventilation member of Comparative Example 1 using SEM 500 hours after the start of the durability test. A ventilation member according to a first aspect of the present invention is A porous film containing a thermoplastic resin that does not contain fluorine as its main component, The porous film comprises an adhesive layer bonded to it, The content of a specific component in the adhesive layer having an HSP value such that the difference from the HSP value of the thermoplastic resin is 0.5 or less in absolute terms is 8.5 MPa, is less than 0.1% by weight. In a second embodiment of the present invention, for example, in the ventilation member according to the first embodiment, the adhesive layer comprises at least one selected from the group consisting of terpene-based tackifiers and acrylic oligomers. In a third aspect of the present invention, for example, in a ventilation member according to the first or second aspect, the adhesive layer includes a first adhesive layer bonded to the first main surface of the porous film and a second adhesive layer bonded to the second main surface of the porous film. In a fourth embodiment of the present invention, for example, in a ventilation member according to any one of the first to third embodiments, the porous film has a ventilation region where the adhesive layer is not bonded, and the area of the ventilation region is 40 mm² or less. In a fifth embodiment of the present invention, for example, in a ventilation member according to any one of the first to fourth embodiments, the thermoplastic resin includes at least one selected from the group consisting of polyolefin resin, polyester resin, and polyimide resin. In a sixth embodiment of the present invention, for example, in a ventilation member according to any one of the first to fifth embodiments, the thermoplastic resin includes at least one selected from the group consisting of polyolefin resins and polyester resins. In the seventh embodiment of the present invention, for example, in the ventilation member according to any one of the first to sixth embodiments, the thermoplastic resin includes a polyolefin resin. In the eighth aspect of the present invention, for example, in the ventilation member according to any one of the first to seventh aspects, the porous film is a stretched film. In the ninth aspect of the present invention, for example, the ventilati