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KR-20260065607-A - laminated film

KR20260065607AKR 20260065607 AKR20260065607 AKR 20260065607AKR-20260065607-A

Abstract

A laminated film having a resin layer on at least one side of a resin substrate, wherein when the surface of the resin layer is analyzed by time-of-flight secondary ion mass spectrometry, the peak intensity of a fragment of a cation exhibiting maximum intensity detected is M, and the sum of the peak intensity of an alkali metal element cation and an alkaline earth metal element cation is T, the T/M ratio is 0.001 or higher and 0.100 or lower, and the tape peel strength is 2.0 N/19 mm or lower. A laminated film that suppresses device performance degradation when used as a process film for electronic components, including multilayer ceramic capacitors, or components of batteries.

Inventors

  • 나카니시 유타
  • 이와야 타다히코
  • 오타 카즈요시
  • 이하라 다이키

Assignees

  • 도레이 카부시키가이샤

Dates

Publication Date
20260508
Application Date
20240731
Priority Date
20230904

Claims (16)

  1. A laminated film having a resin layer on at least one side of a resin substrate, wherein when the surface of the resin layer is analyzed by time-of-flight secondary ion mass spectrometry, the peak intensity of a cation fragment exhibiting maximum intensity detected is M, and the sum of the peak intensity of an alkali metal element cation and an alkaline earth metal element cation is T, the T/M ratio is 0.001 or greater and 0.100 or less, and the tape peel strength is 2.0 N/19 mm or less.
  2. In Article 1, A laminated film in which the ratio (Sv/Th) of the maximum groove depth Sv of the resin layer and the thickness Th of the resin layer is 0.001 or greater and 0.50 or less, and in the peak intensity F detected by time-of-flight secondary ion mass spectrometry of the surface of the resin layer, the ratio ( Fh / Fb ) of the total peak intensity Fh of a fragment composed of 45 C₂H₅O⁺ , 59 C₃H₇O⁺ , and 75 SiCH₃O²⁻ to the total peak intensity Fb of a fragment originating from the resin substrate is 1.000 or greater and 100.000 or less.
  3. A laminated film having a resin layer on at least one side of a resin substrate, wherein the ratio of the maximum groove depth Sv of the resin layer to the thickness Th of the resin layer (Sv/Th) is 0.001 or more and 0.50 or less, and in the peak intensity F detected by time-of-flight secondary ion mass spectrometry on the surface of the resin layer, the ratio of the total peak intensity Fh of a fragment consisting of 45 C₂H₅O⁺ , 59 C₃H₇O⁺ , and 75 SiCH₃O²⁻ to the total peak intensity Fb of a fragment originating from the resin substrate (Fh/Fb) is 1.000 or more and 100.000 or less.
  4. In Paragraph 3, A laminated film having a T/M ratio of 0.001 or greater and 0.100 or less, wherein M is the peak intensity of a cation fragment exhibiting maximum intensity detected when the surface of the resin layer is analyzed by time-of-flight secondary ion mass spectrometry, and T is the sum of the peak intensity of an alkali metal element cation and an alkaline earth metal element cation.
  5. In Article 3 or Article 4, A laminated film having a tape peel strength of the resin layer of 2.0 N/19 mm or less.
  6. In any one of paragraphs 1 to 5, A laminated film having a K/M ratio of 0.001 or more and 0.050 or less, where K is the peak intensity of potassium cations detected when the surface of the resin layer is analyzed by time-of-flight secondary ion mass spectrometry.
  7. In any one of paragraphs 1 to 6, A laminated film in which the resin layer has a sea-island shape domain in terms of elastic modulus of an atomic force microscope (AFM), and the major axis Da of the sea portion in the sea-island shape domain is 0.05 μm or more and 10 μm or less.
  8. In Article 7, A laminated film in which Da/Db is 1.1 or greater, where Db is the short diameter of the diagram portion in the above-mentioned diagram shape domain.
  9. In any one of paragraphs 1 through 8, A laminated film having a Si/M ratio of less than 0.010, where Si is the peak intensity of a cation fragment derived from polydimethylsiloxane detected when the surface of the resin layer is analyzed by time-of-flight secondary ion mass spectrometry.
  10. In any one of paragraphs 1 through 9, A laminated film comprising at least one of biomass raw materials and recycled raw materials.
  11. In any one of Articles 1 to 10, A laminated film satisfying I(15°)-I(90°)≥0.50, wherein, for the X-ray absorption microstructure (XAFS) spectrum measured by partial electron quantification for the resin layer, the angle formed between the incident X-ray and the surface of the resin layer is θ, and the spectral intensity of 293.5 eV is I(θ).
  12. In any one of paragraphs 1 to 11, A laminated film in which the resin layer contains a long-chain alkyl resin and a melamine resin.
  13. In Article 12, The above long-chain alkyl resin is a laminated film that is a block copolymer with acrylic as the main framework.
  14. In any one of paragraphs 1 to 13, A laminated film in which the resin layer further contains an acrylic resin and/or polyester resin with an acid value of 5 mgKOH/g or higher.
  15. In any one of paragraphs 1 to 14, Laminated film used in the manufacturing process of electronic components or battery components.
  16. A method for manufacturing a laminated film according to any one of claims 1 to 15, comprising, in this order, a coating process of applying a resin composition for forming a resin layer, which has water as the main solvent, to at least one surface of a polyester resin substrate sheet; a stretching process of stretching the polyester resin substrate sheet after applying the resin composition in at least one axial direction; and a heat treatment process of heating the polyester resin substrate sheet after stretching to form a resin layer.

Description

laminated film The present invention relates to a laminated film having a resin layer on at least one side of a resin substrate. Plastic films are widely used as substrate films in many applications, such as magnetic recording materials and packaging materials, due to their excellent mechanical properties, electrical properties, dimensional stability, transparency, and chemical resistance. Furthermore, plastic films having a resin layer with excellent release properties formed on at least one outermost surface are often used as process films (hereinafter referred to as release films) as protective films for adhesive layers in adhesive products, or as carrier films in the production and processing of electronic components or battery components. The resin layer of such process films is generally formed by coating with paint, but the organic solvents contained in the paint pose a problem in terms of environmental burden. Considering this background, the use of water-based paints, which use water as the main solvent or dispersion medium, has recently become widespread in order to reduce organic solvents and improve the working environment and reduce environmental burden. For example, a film in which a layer containing a silicon compound is formed by a water-based paint (Patent Document 1), or a process film in which a long-chain alkyl resin that does not contain a silicon compound in the resin layer is used as a release agent for the purpose of resolving defects originating from silicon compounds, such as cratering or pinholes in the coating solution (Patent Document 2). In addition, multilayer ceramic capacitors, which are a type of electronic component, are small in size and have a wide capacitance range. They are used in various electrical circuits for purposes such as noise reduction and power supply voltage smoothing, and have become essential core components for the high functionality of mobile phones and automobiles. In the manufacturing process of multilayer ceramic capacitors, a dielectric ceramic slurry is applied onto a release film and dried, and then the layer (surface layer) formed by the slurry is peeled off from the release film. In addition, research and development of all-solid-state batteries is being actively carried out as a next-generation battery capable of achieving both safety and battery performance. In particular, it is known that in all-solid-state batteries using oxide-based solid electrolytes, which have high stability in the atmosphere and are resistant to heat, it is possible to increase ion conductivity by making the internal structure of the device a stacked structure similar to that of a multilayer ceramic capacitor (Patent Document 3). A stacked all-solid-state battery using an oxide-based solid electrolyte can be manufactured by a process similar to that of a multilayer ceramic capacitor. A solid electrolyte slurry is applied onto a release film and dried to form a surface layer, and then a solid electrolyte layer is formed by peeling the surface layer from the release film. It is known that in multilayer electronic components such as those described above, particularly multilayer ceramic capacitors, alkaline earth metal oxides such as SrO and CaO, or alkali metal oxides such as Na₂O and K₂O , are present as impurities in the dielectric barium titanate, which significantly affects the sintering state of the barium titanate and, furthermore, its electrical characteristics (Patent Document 4). In addition, to increase the stacking precision of the constituent members in the aforementioned stacked electronic component, the surface layer of the release film in contact with each layer corresponding to the constituent member of the electronic component is required to be smooth, in particular, having few protrusions (Patent Documents 5, 6). Hereinafter, the laminated film of the present invention will be described in detail. The laminated film of the present invention includes the first laminated film of the present invention and the second laminated film of the present invention. Furthermore, unless otherwise specifically stated, "the laminated film of the present invention" shall refer to both. The first laminated film of the present invention has a resin layer on at least one side of a resin substrate, and is a laminated film in which, when the peak intensity of a fragment of a cation exhibiting maximum intensity detected when the surface of the resin layer is analyzed by time-of-flight secondary ion mass spectrometry is M, and the sum of the peak intensity of a cation of an alkali metal element and a cation of an alkaline earth metal element is T, the T/M is 0.001 or more and 0.100 or less, and the tape peel strength is 2.0 N/19 mm or less. The second laminated film of the present invention has a resin layer on at least one side of a resin substrate, and the ratio (Sv/Th) of the maximum groove depth Sv of the resin layer and the thickness Th of the resin layer is 0.001 or more