WO2020036141A1 - 積層体 - Google Patents

積層体 Download PDF

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Publication number
WO2020036141A1
WO2020036141A1 PCT/JP2019/031636 JP2019031636W WO2020036141A1 WO 2020036141 A1 WO2020036141 A1 WO 2020036141A1 JP 2019031636 W JP2019031636 W JP 2019031636W WO 2020036141 A1 WO2020036141 A1 WO 2020036141A1
Authority
WO
WIPO (PCT)
Prior art keywords
laminate
thermal expansion
resin
present
ratchet structure
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/JP2019/031636
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
拓平 束田
望月　章弘
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.)
Polyplastics Co Ltd
Original Assignee
Polyplastics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Polyplastics Co Ltd filed Critical Polyplastics Co Ltd
Priority to US17/262,880 priority Critical patent/US11607868B2/en
Priority to CN201980043638.4A priority patent/CN112384363B/zh
Priority to DE112019004113.4T priority patent/DE112019004113T5/de
Publication of WO2020036141A1 publication Critical patent/WO2020036141A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
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    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/082—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising vinyl resins; comprising acrylic resins
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    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
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Definitions

  • the present invention relates to a laminate of two materials having different coefficients of thermal expansion, the laminate having a ratchet structure on the laminated surface.
  • Bimetallics are well known as a laminate of two materials having different coefficients of thermal expansion, which convert a thermal change into a mechanical change.
  • the bimetal utilizes the fact that the degree of bending of the laminated body changes due to a temperature change, and is used in various fields such as switching. In the bimetal, when the temperature returns to the original temperature, the shape of the laminate also returns to its original shape, and the heat change due to heating and cooling does not remain in the laminate as a mechanical deformation amount.
  • the inventor of the present invention has found a structure in which the repetition of heating and cooling can be left as a mechanical deformation.
  • a laminate comprising two types of first and second members having different coefficients of thermal expansion, wherein a laminate surface has a ratchet structure. However, the thermal expansion coefficient of the first member is larger than the thermal expansion coefficient of the second member.
  • the repetition of heating and cooling can be left as a mechanical deformation amount.
  • the amount of deformation can be left as a mechanical amount called stress.
  • FIG. 3 is a conceptual diagram showing the movement of a resin-metal laminate having a ratchet structure according to the present invention.
  • 4 is an actual photograph showing the movement of the resin-metal laminate shown in FIG. 5 is the actually measured ratchet structure shape of the laminate shown in FIG. 4.
  • It is an example of the ratchet structure of the present invention manufactured by injection molding. It is an example of the ratchet structure of the present invention manufactured by injection molding.
  • the laminate of the present invention is a laminate of two types of first member and second member having different coefficients of thermal expansion, wherein the laminated surface has a ratchet structure.
  • the coefficient of thermal expansion in the present invention refers to a coefficient of linear expansion per 1 K at 23 to 55 ° C. ( ⁇ 10 ⁇ 6 / K).
  • a material that can be used in the present invention a material having a coefficient of thermal expansion of 10 or more can be preferably used, and the difference between the coefficients of thermal expansion of the first and second members can be different even in principle. If the effect of the present invention can be obtained, it is practically 5 to 250 ( ⁇ 10 ⁇ 6 / K), preferably 20 to 200 ( ⁇ 10 ⁇ 6 / K).
  • Resins having a coefficient of thermal expansion of 60 to 250 such as polyethylene, polypropylene, nylon 6, ABS, polycarbonate, polyacetal, polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, liquid crystal polymer, Cycloolefin polymers and the like can be mentioned.
  • the resin may contain an inorganic filler for adjusting the coefficient of thermal expansion.
  • the metal examples include those having a thermal expansion coefficient of 4 to 50 ( ⁇ 10 ⁇ 6 / K), such as aluminum, chromium, titanium, iron, nickel, brass, copper, and alloys thereof such as stainless steel. it can.
  • the inorganic substance other than the metal examples include those having a thermal expansion coefficient of 3 to 15 ( ⁇ 10 ⁇ 6 / K), such as glass and ceramic.
  • composite materials such as CFRP and GFRP can also be mentioned.
  • the fiber amount and the fiber orientation angle may be adjusted for adjusting the coefficient of thermal expansion.
  • resin-to-resin, metal-to-metal, resin-to-metal, resin-to-ceramic, resin-to-composite materials and the like can be appropriately selected, but a resin-to-metal combination is preferable.
  • Ratchet structure of laminated surface has a structure in which, when two kinds of materials are used as a first member and a second member on the lamination surface of the laminate, they serve as a so-called gear and a pawl, respectively (FIG. 1). ). Also includes shark skin riblets, saw blades, scales, and the like.
  • the ratchet structure of the present invention preferably satisfies the following expressions 1 to 3 as shown in FIG. 1. Moving conditions in the thickness direction: 2. Moving conditions in the plane direction: 3. Lock condition: However, each symbol means the following.
  • Equation 1 is a condition for moving in the thickness direction.
  • Equation 2 is a condition for moving in the plane direction, that is, the longitudinal direction in the plane.
  • Equation 3 is a condition for not returning to the original state when cooled after heating.
  • a condition is that thermal expansion and contraction occur within elastic deformation.
  • the first member having a large coefficient of thermal expansion expands as a whole (thickness direction + plane direction)
  • any one of the pitches existing in the plane direction of the laminated body is the same as the original micro ratchet structure location. Is considered to be locked if they are engaged at different places.
  • the laminate satisfies these formulas 1 to 3, repetition of heating and cooling can be left as the amount of mechanical deformation of the laminate.
  • each material generates a force by heating and cooling in the direction of the arrow.
  • the first member and the second member are thermally expanded by heating, and if the deformation exceeds one unit, the ratchet is locked by the ratchet even if the member is to be cooled and then contracted, and cannot return to the original state.
  • the processing depth t of the micro ratchet structure is preferably 0.05 to 2.3%, more preferably 0.1 to 1.0%, and more preferably 0.15 to 0.
  • the content is more preferably 5%, particularly preferably 0.18 to 0.3%.
  • the measured value of the processing depth t is preferably 1 to 160 ⁇ m, more preferably 2 to 100 ⁇ m, further preferably 3 to 50 ⁇ m, and particularly preferably 5 to 20 ⁇ m.
  • the thickness h of the first member is preferably 1 to 10 mm, more preferably 1.5 to 8 mm, even more preferably 2 to 6 mm.
  • the shape is not particularly limited, and both of the two materials may be a desired molded product or sheet, or may be a shape in which one is a cylinder and the other is wound around the cylinder. There may be.
  • FIG. 3 and 4 show an example of insert resin molding for molding a polyacetal resin around a metal cylinder. Resins have a higher coefficient of thermal expansion than metals.
  • a ratchet as shown in FIG. 3 is formed on the metal cylinder.
  • a resin layer is formed on the ratchet structure by insert molding. By repeating the heating-cooling of this laminate, the resin laminate moved from the position indicated by the dotted line in FIG. 3A to the position in FIG. 3B.
  • FIG. 4 is a photograph showing that it actually moved.
  • FIG. 5 shows a specific size of each member.
  • FIG. 7 shows that a ratchet having a shape in which the resin is deformed toward the weld is formed on the metal column.
  • a force for deforming the resin toward the weld acts by repeating the heating and cooling.
  • the bonding strength at the weld is increased, and breakage at the weld due to repeated heating-cooling deformation is less likely to occur.
  • the repetition of heating-cooling can be converted into a mechanical quantity.

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Gears, Cams (AREA)
PCT/JP2019/031636 2018-08-13 2019-08-09 積層体 Ceased WO2020036141A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US17/262,880 US11607868B2 (en) 2018-08-13 2019-08-09 Ratchet stack
CN201980043638.4A CN112384363B (zh) 2018-08-13 2019-08-09 层叠体
DE112019004113.4T DE112019004113T5 (de) 2018-08-13 2019-08-09 Stapel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018152268A JP6968766B2 (ja) 2018-08-13 2018-08-13 積層体
JP2018-152268 2018-08-13

Publications (1)

Publication Number Publication Date
WO2020036141A1 true WO2020036141A1 (ja) 2020-02-20

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PCT/JP2019/031636 Ceased WO2020036141A1 (ja) 2018-08-13 2019-08-09 積層体

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