WO2020067672A1 - 이종 소재 접합체의 제조방법 및 이종 소재 접합체 - Google Patents
이종 소재 접합체의 제조방법 및 이종 소재 접합체 Download PDFInfo
- Publication number
- WO2020067672A1 WO2020067672A1 PCT/KR2019/012048 KR2019012048W WO2020067672A1 WO 2020067672 A1 WO2020067672 A1 WO 2020067672A1 KR 2019012048 W KR2019012048 W KR 2019012048W WO 2020067672 A1 WO2020067672 A1 WO 2020067672A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin layer
- less
- metal substrate
- laser
- etching groove
- Prior art date
Links
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Images
Classifications
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Definitions
- the present invention relates to a method for manufacturing a heterogeneous material conjugate and a heterogeneous material conjugate.
- bonding between dissimilar materials is often not easy because the physical and chemical properties and surface conditions of each material are different.
- Techniques that can be attempted for bonding between dissimilar materials can be classified into bonding using an adhesive, mechanical tightening, welding, insert injection, and the like.
- the method of using the adhesive has the advantage that the method of use is simple, and thus it is most frequently used as a representative and classic method used for bonding between dissimilar materials in electronic products.
- the present invention provides a method for manufacturing a heterogeneous material bonding body and a heterogeneous material bonding body that can easily realize bonding between multilayer resins and bonding between resins and metals.
- An exemplary embodiment of the present invention comprises the steps of: preparing a metal substrate including two or more etching grooves on one surface, and protrusions provided adjacent to the etching grooves; Sequentially stacking a first resin layer and a second resin layer on one surface of the metal substrate to produce a laminate; And irradiating a laser on the surface of the second resin layer; including, for any wavelength of 800 nm or more and 1100 nm or less, the light transmittance of the first resin layer is 20% or more and 70% or less , For a wavelength of any one of 800 nm or more and 1100 nm or less, the light transmittance of the first resin layer is less than the light transmittance of the second resin layer.
- a metal substrate including two or more etching grooves on one surface, and a protrusion provided adjacent to the etching grooves; And a first resin layer and a second resin layer sequentially stacked on one surface of the metal substrate; and for any wavelength of 800 nm or more and 1100 nm or less, the light transmittance of the first resin layer is 20 % Or more and 70% or less, and for any wavelength of 800 nm or more and 1100 nm or less, the light transmittance of the first resin layer is less than that of the second resin layer to provide a heterogeneous material bonding body.
- the method for manufacturing a dissimilar material bonded body according to an exemplary embodiment of the present invention has an advantage of simultaneously forming a bond between resin layers and a bond between a resin layer and a metal substrate through a simple method.
- the heterogeneous material bonded body according to an exemplary embodiment of the present invention may have excellent bonding strength between a metal substrate and a first resin layer, and bonding strength between a first resin layer and a second resin layer.
- FIG. 1 is a plan view (A) of a surface of a metal substrate etched according to an exemplary embodiment of the present invention and a state (B) of observing the metal substrate with a scanning electron microscope (SEM).
- SEM scanning electron microscope
- FIG. 2 is a side cross-sectional view of a metal substrate according to an exemplary embodiment of the present invention.
- FIG. 3 is a view schematically showing a method of manufacturing a heterogeneous material conjugate according to an exemplary embodiment of the present invention.
- Figure 4a is a photograph of a heterogeneous material conjugate prepared in Example 1 of the present invention
- Figure 4b is a photograph of a transfer material conjugate prepared in Example 2 of the present invention.
- FIG. 5A is a photograph of a heterogeneous material conjugate prepared in Comparative Example 1
- FIG. 5B is a photograph of a heterogeneous material conjugate prepared in Comparative Example 2
- FIG. 5C is a photograph of a heterogeneous material conjugate prepared in Comparative Example 3
- Figure 5d is a photograph of a heterogeneous material conjugate prepared in Comparative Example 4.
- a component when “equipped” in a part, it may mean that it is located or provided on a part, not formed through a special or limited method.
- the thickness of the member is measured in comparison with a corresponding scale in a scanning electron microscope (SEM; Scanning Electron Microscope S-4800, HITACHI Co.) image of the side of the member, or by using a thickness gauge It can be measured.
- SEM scanning electron microscope
- the “light transmittance” of the member may mean a ratio of the amount of light transmitted through the member to the amount of light incident on the member, and “light reflectivity” is the amount of light reflected from the member with respect to the amount of light incident on the member.
- the ratio may mean a ratio
- “light absorption” may mean a ratio of the amount of light absorbing the member to the amount of light incident on the member
- the light transmittance of the member may be the light absorption (%) and light reflectance (%) of the member. It may mean the value subtracted from 100%.
- the light transmittance, light reflectance, and light absorption of the member may be a value at a specific wavelength measured using a Spolid 3700 device manufactured by Shimadzu.
- An exemplary embodiment of the present invention comprises the steps of: preparing a metal substrate including two or more etching grooves on one surface, and protrusions provided adjacent to the etching grooves; Sequentially stacking a first resin layer and a second resin layer on one surface of the metal substrate to produce a laminate; And irradiating a laser on the surface of the second resin layer; including, for any wavelength of 800 nm or more and 1100 nm or less, the light transmittance of the first resin layer is 20% or more and 70% or less , For a wavelength of any one of 800 nm or more and 1100 nm or less, the light transmittance of the first resin layer is less than the light transmittance of the second resin layer.
- the method for manufacturing a dissimilar material bonded body according to an exemplary embodiment of the present invention has an advantage of simultaneously forming a bond between resin layers and a bond between a resin layer and a metal substrate through a simple method.
- the metal substrate a conventional one may be used without particular limitation, but it may be preferable to use one having a suitable light absorption and easy pattern formation by laser irradiation.
- a pure metal such as aluminum (Al) and titanium (Ti) or an alloy such as stainless steel (STS) may be used as the metal substrate.
- the shape of the metal substrate can be applied without particular limitations as long as it can be etched by laser irradiation and can be smoothly joined with a resin.
- the metal substrate may have a shape of a cylindrical shape, a polyhedron including a curved surface, and a polyhedron.
- a metal substrate including two or more etching grooves and protrusions provided adjacent to the etching grooves is prepared. You can.
- the first laser may be a pulse laser having a wavelength of 1064 nm.
- the output of the first laser may be 20 W or more and 200 W or less, specifically 20 W or more and 100 W or less, 20 W or more and 50 W or less, or 20 W or more and 40 W or less.
- the number of repetitions of the first laser may be 30 kHz or more and 600 kHz or less, and specifically, 30 kHz or more and 200 kHz, 40 kHz or more, 600 kHz or less, or 40 kHz or more and 200 kHz or less .
- the number of repetitions of the first laser may mean the frequency per second of the pulse laser.
- the scanning speed of the first laser may be 100 mm / s or more and 1,000 mm / s or less, and specifically 100 mm / s or more and 400 mm / s or less, 200 mm / s or more and 1,000 mm or more / s or less, 200 mm / s or more and 400 mm / s or less, 200 mm / s or more and 450 mm / s or less, 300 mm / s or more and 400 mm / s or less, or 300 mm / s or more and 450 mm / s or less .
- the scanning speed of the pulse laser may mean a speed of moving from one point to another point of the irradiated laser.
- the number of times the first laser is irradiated may be 1 or more and 10 or less, specifically 1 or more and 8 or less, 1 or more and 4 or less, 2 or more and 10 or less, 2 The number of times may be 8 times or less, 2 times or more and 4 times or less, or 4 times or more and 8 times or less.
- the pulse width of the first laser may be 15 ns or more and 220 ns or less.
- the spot size of the first laser may be 15 ⁇ m or more and 50 ⁇ m or less, and specifically 25 ⁇ m or more and 50 ⁇ m or less, 30 ⁇ m or more, 50 ⁇ m or less, or 35 ⁇ m or more and 50 ⁇ m or less have.
- spot size may mean the maximum distance from one end to the other end of the focus of the pulse laser.
- the peak power of the first laser may be 1.5 kW or more and 6 kW or less, specifically 1.5 kW or more and 3.4 kW or less, 1.9 kW or more and 6 kW or less, or 1.9 kW or more and 3.4 kW or less have.
- the pulse energy of the first laser may be 0.1 mJ or more and 2 mJ or less, and specifically, 0.1 mJ or more and 1 mJ or less, 0.5 mJ or more, 2 mJ or less, or 0.5 mJ or more and 1 mJ or less.
- the etching groove depth, the etching groove inlet width, the etching groove intermediate width, the length of the protrusion, the height of the protrusion and the surface of the protrusion and the metal substrate can be controlled as described below. Through this, it is possible to increase the bonding force between the metal substrate and the first resin layer.
- the energy condition of the first laser is capable of re-condensing the evaporated material at the wall of the etching groove and the entrance of the etching groove, and forming the protrusion protruding from the metal substrate relatively roughly. have. Through this, an area and an anchoring structure capable of bonding the metal substrate and the first resin layer can be easily formed.
- the first laser may be irradiated in the depth direction of the etching groove, and according to the irradiation of the first laser, a part of the metal substrate is etched from the surface of the metal substrate. It may be melted in a direction away from the central axis to have the protrusion.
- the rest of the metal substrate except for a portion having a protrusion according to the irradiation of the first laser may be melted toward the central axis of the etching groove in the metal substrate on which the etching groove is formed. Accordingly, an etching groove having a relatively narrow entrance width can be formed.
- the melting of the metal substrate may proceed rapidly, and then the molten metal substrate may be cooled while the first laser focus moves, and the molten metal substrate may be etched As it is cooled from the portion adjacent to the etched groove having a relatively narrow inlet width compared to the middle width can be formed.
- an etching groove may be formed on one surface of the metal substrate according to a traveling direction of the first laser. That is, the traveling direction of the first laser and the traveling direction of the etching groove may coincide.
- two or more first lasers may be irradiated on one surface of the metal substrate, and the traveling directions of the two or more first lasers may intersect. Specifically, the traveling direction of the one first laser and the traveling direction of the other first laser may intersect.
- burrs protruding from the surface of the etched metal substrate are etched into the etching groove. Adjacent to one surface of the metal substrate, it may be formed to protrude away from the etching groove.
- an etching groove having a size of a micrometer ( ⁇ m) is formed on one surface of the metal substrate, and a protrusion is adjacent to the etching groove and away from the etching groove. It can be formed in the direction.
- the etching groove may be formed according to the traveling direction of the first laser, an etching groove formed according to the traveling direction of the one first laser and an etching groove formed according to the traveling direction of the other first laser.
- one of the protrusions adjacent to the one etching groove and one of the protrusions adjacent to the other etching groove are continuously connected to face each other, and are formed according to another first laser traveling direction.
- the pair of protrusions are respectively connected to the other protrusions, so that a fence shape having a space therein can be formed.
- a traveling direction of one etching groove and a traveling direction of another etching groove may be parallel.
- a direction in which one of the etching grooves and a direction in which the other etching grooves progress may cross at right angles or at non-right angles.
- FIG. 1 is a plan view (A) of a surface of a metal substrate etched according to an exemplary embodiment of the present invention and a state (B) of observing the metal substrate with a scanning electron microscope (SEM).
- SEM scanning electron microscope
- the traveling direction (X) of the one etching groove 10 and the traveling direction (Y) of the other etching groove 10 cross at right angles, it is provided in a direction away from the etching groove
- the protrusion 20 is continuously or discontinuously provided according to the traveling direction (X and Y) of the etching groove 10, and the surface area 30 surrounded by the protrusion 20 It may be provided in a square or rectangular form.
- the surface of the metal substrate may exhibit a lattice structure.
- the traveling direction X of one etching groove 10 and the traveling direction Y of the other etching groove 10 cross (specifically, Orthogonal), it may be a structure formed by the etching groove (10).
- the light reflectivity of one surface of the metal substrate can be adjusted to an appropriate level. Through this, bonding between one surface of the metal substrate and the first resin layer may be more easily formed, and the bonding strength may be excellent.
- FIG. 2 is a side cross-sectional view of a metal substrate according to an exemplary embodiment of the present invention.
- an etching groove 10 in a micrometer ( ⁇ m) unit is provided on the surface of the metal substrate, and protrusions 20a and 20b are adjacent to the etching groove and provided in a direction away from the etching groove.
- the protrusion may be provided in a form protruding from the surface of the metal substrate, and the protrusion may be provided in a form protruding away from the etching groove. .
- the protrusion 20b provided on the surface of the metal substrate adjacent to the one etching groove 10 and the protrusion provided on the surface of the metal substrate adjacent to the other etching groove (20c) is continuously or discontinuously connected to form a facing shape, and finally formed of four surfaces, and a fence shape in which the space 30 is formed may be provided.
- one of the protrusions 20b adjacent to one etching groove 10 provided in the metal substrate according to one embodiment of the present invention, and one of the protrusions 20c adjacent to the other etching groove Is continuously or discontinuously connected to face each other, is provided according to the direction of the other etching grooves, and a pair of facing protrusions (not shown) are connected to the protrusions indicated by 20b and 20c, respectively.
- the surface area 30 may be provided with a fence shape.
- the cross-sectional shape of the traveling direction of the one etching groove and the cross-sectional shape of the traveling direction of the other etching groove may be very similar.
- the traveling direction of the one etching groove and the traveling direction of the other etching groove cross orthogonally, the cross-sectional shape of the traveling direction of the one etching groove and the cross-sectional shape of the traveling direction of the other etching groove May be different.
- the protrusion may be provided at an acute angle with respect to one surface of the metal substrate.
- the angle formed by one surface of the metal substrate and the protrusion provided in a direction away from the etching groove may be an acute angle.
- the angle formed by the protrusion relative to one surface of the metal substrate is 30 ° or more and 80 ° or less, 30 ° or more and 70 ° or less, 35 ° or more and 80 ° or less, 35 ° or more and 70 ° or less, It may be 35 ° or more and 60 ° or less, 40 ° or more and 70 ° or less, or 40 ° or more and 60 ° or less.
- the angle between the protrusion and one surface of the metal substrate may mean an angle between the protrusion provided in a direction away from the etching groove and one surface of the metal substrate.
- a ratio of the etching groove depth to the etching groove inlet width may be 1: 3 to 1:14, or 1: 3 to 1:13.
- the first resin layer can be sufficiently filled inside the etching groove, so that the bonding strength between the metal substrate and the first resin layer can be improved.
- the etch groove inlet width may mean a width of the etch groove on an extension line of the surface of the metal substrate on which the etch groove is formed.
- the depth of the etching groove may mean a maximum distance from the lowest point of the etching groove to an intersection of the extension line of the metal substrate and the central axis of the etching groove.
- the etch groove inlet width may be 10 ⁇ m or more and 25 ⁇ m or less, or 10 ⁇ m or more and 20 ⁇ m or less.
- the depth of the etching groove may be 50 ⁇ m or more and 250 ⁇ m or less, 50 ⁇ m or more and 240 ⁇ m or less, 60 ⁇ m or more and 250 ⁇ m or less, or 60 ⁇ m or more and 240 ⁇ m or less.
- the intermediate width of the etching groove may be 15 ⁇ m or more and 30 ⁇ m or less, or 20 ⁇ m or more and 30 ⁇ m or less, and the ratio of the middle width of the etching groove to the etching groove inlet width is 1: 1.3 to 1: 3.
- the resin layer may be sufficiently filled in the etching groove, and accordingly, the bonding force between the metal substrate and the first resin layer may be improved.
- the middle width of the etching groove may mean a maximum distance between the etching grooves at a point that is half the depth of the etching groove.
- the metal substrate by adjusting the inlet width, the intermediate width, and the depth of the etching groove in the above-described range, to effectively improve the bonding strength of the metal substrate and the first resin layer, the metal substrate
- the light reflectance of one surface can be controlled within an appropriate range.
- the length from one end to the other end of the protrusion is 25 ⁇ m or more and 80 ⁇ m or less, 25 ⁇ m or more and 70 ⁇ m or less, 30 ⁇ m or more, 80 ⁇ m or less, 30 ⁇ m or more, 70 ⁇ m or less, 30 It may be 50 ⁇ m or more, 35 ⁇ m or more, 70 ⁇ m or less, or 35 ⁇ m or more and 50 ⁇ m or less.
- the height of the protrusion is 30 ⁇ m or more and 100 ⁇ m or less, 30 ⁇ m or more, 90 ⁇ m or less, 40 ⁇ m or more, 100 ⁇ m or less, 40 ⁇ m or more, 90 ⁇ m or less, 40 ⁇ m or more, 80 ⁇ m or less, It may be 50 ⁇ m or more and 90 ⁇ m or less, or 50 ⁇ m or more and 80 ⁇ m or less.
- the first resin layer may be sufficiently supplied to be fixed to the metal substrate with sufficient bonding force.
- the distance between the central axes of the etching grooves is 50 ⁇ m or more and 1,000 ⁇ m or less, 50 ⁇ m or more and 800 ⁇ m or less, 80 ⁇ m or more, 1,000 ⁇ m or less, 80 ⁇ m or more, 800 ⁇ m or less, 80 ⁇ m or more, 500 It may be ⁇ m or less, 100 ⁇ m or more, 500 ⁇ m or less, 80 ⁇ m or more, 250 ⁇ m or less, or 100 ⁇ m or more and 250 ⁇ m or less.
- the distance between the central axes of the etching grooves may mean a distance from the end of one etching groove to the end of the other etching groove where the depth of the etching groove is maximum.
- the bonding force between the metal substrate and the first resin layer may be stronger as the height of the protrusion is higher and the gap between the etching grooves is narrow.
- the surface of the metal substrate can be modified by using a method such as treatment and / or chemical corrosion treatment.
- a method such as treatment and / or chemical corrosion treatment.
- a first resin layer and a second resin layer are sequentially stacked on one surface of the metal substrate to produce a laminate, and a laser (hereinafter, a first) is formed on the surface of the second resin layer.
- a laser hereinafter, a first
- a dissimilar material bonded body in which the first resin layer and the metal substrate are bonded and the first resin layer and the second resin layer are bonded can be produced.
- FIG. 3 is a view schematically showing a method of manufacturing a heterogeneous material conjugate according to an exemplary embodiment of the present invention.
- the etching groove and the protrusion provided on one surface of the metal substrate are omitted.
- a first resin layer 210 is provided on one surface of the metal substrate 100, and a second resin layer 220 is provided on one surface of the first resin layer 210.
- the second laser Laser
- the second laser is irradiated from the second resin layer 220 in the direction of the metal substrate 100, it is possible to manufacture a heterogeneous material bonded body.
- the second laser when irradiating a second laser from the second resin layer toward the metal substrate, the second laser passes through the second resin layer and the first resin layer, and one surface of the metal substrate Can reach the statue.
- the second resin layer and the first resin layer are thermal energy absorbed from the second laser, reflected from one surface of the metal substrate, and the first
- the first resin layer and the second resin layer may be fused and joined by thermal energy reabsorbed by the resin layer and thermal energy transferred from one surface of the metal substrate.
- the first resin layer may be melted to fill the inside of the etching groove formed on one surface of the metal substrate, and the metal substrate and the first resin layer may be joined.
- the first resin layer melts.
- the etching groove and the interior space of the fence-shaped protrusion a junction between the metal substrate and the first resin layer, that is, a heterogeneous material may be formed.
- the light transmittance of the first resin layer is 20% or more and 70% or less, and the light transmittance of the first resin layer is the It may be smaller than the light transmittance of the second resin layer.
- the second laser can penetrate the first resin layer and the second resin layer to effectively reach one surface of the metal substrate, and the second laser is generated in the process of reaching the one surface of the metal substrate. Through thermal energy, bonding between the metal substrate and the first resin layer, and bonding between the first resin layer and the second resin layer can be easily performed at the same time.
- the light transmittance of the first resin layer may be 20% or more and 70% or less. Specifically, for any wavelength of 800 nm or more and 1100 nm or less, the light transmittance of the first resin layer may be 25% or more and 65% or less, 30% or more and 60% or less, or 35% or more and 65% or less. More specifically, the light transmittance of the first resin layer may be for light having a wavelength of 915 nm.
- the second laser can easily reach one surface of the metal substrate, and in the process of reaching the second laser on one surface of the metal substrate
- the first resin layer can effectively absorb thermal energy. Through this, bonding between the first resin layer and the second resin layer and between the first resin layer and the metal substrate can be effectively performed simultaneously.
- the light absorption of the first resin layer may be 20% or more and 50% or less. Specifically, for any wavelength of 800 nm or more and 1100 nm or less, the light absorption of the first resin layer may be 25% or more and 45% or less, or 30% or more and 40% or less. More specifically, the light absorption of the first resin layer may be for light having a wavelength of 915 nm.
- the first resin layer can effectively absorb energy from the second laser in the process of reaching the second laser on one surface of the metal substrate, It is possible to effectively absorb energy reflected from one surface of the metal substrate. Through this, bonding between the first resin layer and the second resin layer and bonding between the first resin layer and one surface of the metal substrate can be effectively formed.
- the first resin layer may simultaneously serve as a light transmitting material and a light absorbing material.
- the light reflectivity of one surface of the metal substrate may be 50% or less.
- the light reflectivity of one surface of the metal substrate is 10% or more and 50% or less, 15% or more and 45% or less, 20% or more and 35% or less, 12.5% or more and 27.5 or more % Or less, 15% or more and 25% or less, or 17% or more and 23% or less.
- the light reflectivity of one surface of the metal substrate may be for light having a wavelength of 915 nm.
- the second laser reaching the one surface of the metal substrate is reflected to the first resin layer to an appropriate degree, and heat energy is transferred to the first resin layer, and 2
- the energy of the laser is absorbed by one surface of the metal substrate, and the first resin layer of the interface (the surface where the first resin layer is in contact with one surface of the metal substrate) can be effectively melted through converted heat. .
- the first resin layer portion located at the interface with one surface of the metal substrate can be effectively melted, and the molten resin can be easily supplied to the surface of the metal substrate, the etching groove, and the interior space of the fence-shaped protrusion. have.
- the light transmittance of the second resin layer may be 50% or more and 80% or less.
- the light transmittance of the second resin layer is 55% or more and 75% or less, 65% or more, 78% or less, 67.5% or more, 75% or less, or 70% It may be more than 73%. More specifically, the light transmittance of the second resin layer may be for light having a wavelength of 915 nm.
- the thickness of the first resin layer may be 0.1 mm or more and 5 mm or less. Specifically, the thickness of the first resin layer may be 0.5 mm to 4.5 mm, 1.0 mm to 4.0 mm, 1.5 mm to 4.5 mm, 2 mm to 4 mm, or 3 mm to 3.5 mm.
- the thickness of the first resin layer may be 0.1 mm or more and 5 mm or less.
- the thickness of the first resin layer may be 0.5 mm to 4.5 mm, 1.0 mm to 4.0 mm, 1.5 mm to 4.5 mm, 2 mm to 4 mm, or 3 mm to 3.5 mm.
- the resin layer used in the art can be adopted without limitation.
- the resin layer used in the art may be adopted without limitation.
- each of the first resin layer and the second resin layer may include at least one of polypropylene resin, polyamide resin, polycarbonate resin, polybutylene terephthalate, polyethylene terephthalate, and a resin containing a reinforcing material.
- the type is not limited.
- the reinforcing material may include at least one of glass fiber, talc, and carbon fiber, but does not limit the type of the reinforcing material.
- the laser may be a diode laser having an output of 50 W or more and 2,000 W or less.
- the diode laser may mean a laser generated by using a forward semiconductor junction as an active medium.
- the wavelength of the second laser may be a wavelength of the near infrared region.
- the wavelength of the second laser may be any one of 800 nm or more and 1100 nm or less, and specifically, 915 nm.
- the output of the second laser may be 50 W or more and 2,000 W or less, and may be appropriately adjusted according to the spot size of the laser and the materials of the first resin layer and the second resin layer.
- the laser (second laser) is irradiated with a spot size of 100 ⁇ m or more and 5,000 ⁇ m or less, an irradiation speed of 10 mm / s or more and 1,000 mm / s or less, and a number of irradiations of 3 or less Can be.
- the spot size of the second laser may be 200 ⁇ m or more, 4,500 ⁇ m or less, 500 ⁇ m or more, 3,500 ⁇ m or less, 750 ⁇ m or more, 2,000 ⁇ m or less, or 1,000 ⁇ m or more and 1,500 ⁇ m or less, and the first It can be appropriately adjusted according to the material of the resin layer and the second resin layer.
- the scanning speed of the second laser may be 50 mm / s or more and 800 mm / s or less, 70 mm / s or more and 500 mm / s or less, or 100 mm / s or more and 250 mm / s or less, and the first resin layer And the material of the second resin layer.
- the number of times the second laser is irradiated may be 3 times or less, specifically 2 times or less. That is, the method for manufacturing a dissimilar material bonded body according to an exemplary embodiment of the present invention easily forms a bond between the metal substrate and the first resin layer, the first resin layer and the second resin layer even with a small number of second laser irradiation times. can do.
- the method for manufacturing a heterogeneous material bonding body according to an exemplary embodiment of the present invention unlike the conventional heterogeneous material bonding method, does not cause problems such as environmental pollution caused by chemical harmful substances or difficult to manage mass production processes.
- a metal substrate including two or more etching grooves on one surface, and a protrusion provided adjacent to the etching grooves; And a first resin layer and a second resin layer sequentially stacked on one surface of the metal substrate; and for any wavelength of 800 nm or more and 1100 nm or less, the light transmittance of the first resin layer is 20 % Or more and 70% or less, and for any wavelength of 800 nm or more and 1100 nm or less, the light transmittance of the first resin layer is less than that of the second resin layer to provide a heterogeneous material bonding body.
- the heterogeneous material bonded body according to an exemplary embodiment of the present invention may have excellent bonding strength between a metal substrate and a first resin layer, and bonding strength between a first resin layer and a second resin layer.
- the heterogeneous material conjugate according to an exemplary embodiment of the present invention may be manufactured by the method of manufacturing the heterogeneous material conjugate.
- each of the metal substrate, the first resin layer and the second resin layer of the heterogeneous material bonded body according to an exemplary embodiment of the present invention includes a metal base material, a first resin layer and a second resin layer in the method for manufacturing the heterogeneous material bonded body described above. It may be the same thing.
- the first resin layer may be filled in the etching groove, between the surface of the metal substrate and the protrusion to be joined to the metal substrate. Specifically, as the molten portion of the first resin layer in contact with one surface of the metal substrate is supplied to and filled in the surface of the metal substrate, the etching groove, and the protrusion-shaped interior space of the fence, the first resin layer and the One surface of the metal base may be bonded.
- the first resin layer and the second resin layer may be fused and bonded. Specifically, bonding may be performed as the interface between the first resin layer and the second resin layer is melted and fused by thermal energy generated in the first resin layer.
- the thickness of the first resin layer may be 0.1 mm or more and 5 mm or less.
- an adhesive or an adhesive is used to bond the resin layer and the metal substrate.
- the pressure-sensitive adhesive or adhesive has a thickness of nanometers to micrometers, and only serves to bond the resin layer and the metal substrate, but did not form a structure of a heterogeneous material bonding body.
- the first resin layer of the heterogeneous material bonding body according to an exemplary embodiment of the present invention has a thickness as described above, and serves to bond the second resin layer and the metal substrate, and at the same time, can achieve the structure of the heterogeneous material bonding body. have.
- the thickness of the metal substrate may be 0.1 mm or more.
- the thickness of the second resin layer may be 0.1 mm or more and 5 mm or less.
- the depth of the etching groove thus formed, the entrance width of the etching groove, and the intermediate width of the etching groove were measured, and the results are shown in Table 2 below.
- the etched aluminum substrate was cut in the vertical direction of the interface and polished to prepare a specimen.
- the average value of the measured values of each shape depth of the etching groove, the width of the etching groove, the middle width of the etching groove, the length of the protrusion and the height of the protrusion
- Etching groove depth ( ⁇ m) Etching groove inlet width ( ⁇ m) Middle width of etching groove ( ⁇ m) Length of protrusion ( ⁇ m) Height of protrusion ( ⁇ m)
- Etching groove inlet width ( ⁇ m)
- the surface of the steel substrate provided with the prepared etching grooves and protrusions had a light reflectivity of about 21% at a wavelength of 915 nm.
- a homopolypropylene resin layer in which light transmittance at a wavelength of 915 nm is about 59%, light absorption is about 30%, thickness is about 1.6 mm, and about 30% by weight of glass fiber is added was prepared.
- an ethylene-propylene block copolymer resin (CB5230) substrate having a light transmittance of about 72% and a thickness of about 3.2 mm at a wavelength of 915 nm was prepared.
- the prepared steel substrate, the first resin layer, and the second resin layer are respectively cut to a size of 20 mm in width and 60 mm in length, and then the first resin layer and the second resin layer are 1 cm on the etched steel substrate surface. It was fixed to overlap in length.
- a laminate in which a steel substrate, a first resin layer, and a second resin layer were sequentially provided was prepared.
- the second resin layer was irradiated with a diode laser having a wavelength of 915 nm, a spot size of 3 mm, and an output of 450 W at a irradiation speed of 40 mm / s twice in the direction of the steel substrate (width direction of the laminate) to dissimilar material Conjugates were prepared.
- a homopolypropylene resin layer in which light transmittance at a wavelength of 915 nm is about 35%, light absorption is about 50%, thickness is about 3.2 mm, and about 30% by weight of glass fiber is added
- a heterogeneous material conjugate was prepared in the same manner as in Example 1, except that was prepared.
- a heterogeneous material bonded body was prepared in the same manner as in Comparative Example 1, except that a resin for laser absorption having a light reflectance of about 5% at a wavelength of 915 nm was prepared instead of the steel substrate.
- a homopolypropylene resin layer having a light transmittance of about 72%, a light absorption of about 15%, and a thickness of about 1.6 mm at a wavelength of 915 nm is prepared, and as a second resin layer at a wavelength of 915 nm.
- a light-transmittance of about 35%, a thickness of about 3.2 mm, and a glass fiber (glass fiber) was prepared in a heterogeneous material assembly in the same manner as in Example 1, except that a homopolypropylene resin layer was added.
- a homopolypropylene resin layer having a light transmittance of about 80% at a wavelength of 915 nm, a light absorption of about 10%, and a thickness of about 3.2 mm was prepared, and as a second resin layer at a wavelength of 915 nm.
- a heteromaterial conjugate was prepared in the same manner as in Example 1, except that a homopolypropylene substrate having a light transmittance of about 72% and a thickness of about 1.6 mm was prepared.
- FIG. 4a is a photograph of a heterogeneous material conjugate prepared in Example 1 of the present invention
- Figure 4b is a photograph of a transfer material conjugate prepared in Example 2 of the present invention.
- FIG. 4A (1) is a photograph of the side surface of the heterogeneous material conjugate prepared in Example 1
- (2) is a photograph of the top surface of the heterogeneous material conjugate prepared in Example 1.
- a method of manufacturing a heterogeneous material bonded body according to Examples 1 and 2 of the present invention includes bonding between a metal substrate and a first resin layer, and bonding between a first resin layer and a second resin layer It was confirmed that can be effectively bonded at the same time. Further, referring to FIG. 4A (1), it was confirmed that the surface of the second resin layer irradiated with the laser was not damaged.
- FIG. 5A is a photograph of a heterogeneous material conjugate prepared in Comparative Example 1
- FIG. 5B is a photograph of a heterogeneous material conjugate prepared in Comparative Example 2
- FIG. 5C is a photograph of a heterogeneous material conjugate prepared in Comparative Example 3
- Figure 5d is a photograph of a heterogeneous material conjugate prepared in Comparative Example 4.
- (1) of Figure 5c is a photograph of the side surface of the heterogeneous material conjugate prepared in Comparative Example 3
- (2) is a photograph of the top surface of the heterogeneous material conjugate prepared in Comparative Example 3.
- the light transmittance and light absorption of the first resin layer, the light transmittance of the second resin layer is out of the scope of the present invention
- the light transmittance of the second resin layer is the first number
- Comparative Example 3 which is lower than the light transmittance of the formation layer
- most of the energy of the irradiated laser is concentrated in the second resin layer and penetrates through the second resin layer and is not sufficiently transmitted to the first resin layer and the metal substrate, resulting in metal It was confirmed that bonding between the substrate and the first resin layer and bonding between the first resin layer and the second resin layer were not formed.
- (2) of FIG. 5C it was confirmed that most of the energy of the laser is concentrated in the second resin layer, and the surface of the second resin layer is damaged.
- Example 1 has a bonding strength of 23 MPa
- Example 2 has a bonding strength of 22 MPa. Further, in the process of measuring the shearing tension of Examples 1 and 2, the metal and plastic interface was broken, and separation between the first resin layer and the second resin layer did not occur.
- Comparative Example 1 and Comparative Example 3 the bonding between the steel substrate and the first resin layer was not formed in the process of manufacturing the heterogeneous material bonding body, and Comparative Example 2 was caused by bonding between the absorbent resin and the first resin layer. Bonding between the resin layer and the second resin layer did not occur.
- Comparative Example 4 only the steel substrate and the first resin layer were joined, and the bonding between the first resin layer and the second resin layer did not occur, and the bonding strengths of the heterogeneous material joint bodies of Comparative Examples 1 to 4 were compared. It could not be measured.
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Abstract
Description
펄스 폭(ns) | 스폿크기(㎛) | 출력(W) | 반복수(kHz) | 주사속도(mm/s) | 첨두 출력(kW) | 에너지 밀도(kJ/cm 2) | 조사 횟수(회) | |
실시예 1 | 220 | 35 | 30 | 40 | 200 | 3.2 | 73 | 1 |
에칭 홈 깊이(㎛) | 에칭 홈 입구 폭(㎛) | 에칭 홈중간 폭(㎛) | 돌출부의 길이(㎛) | 돌출부의높이(㎛) | |
실시예 1 | 80 | 12 | 25 | 45 | 35 |
Claims (10)
- 일면 상에 2 이상의 에칭홈, 상기 에칭홈에 인접하여 구비된 돌출부를 포함하는 금속 기재를 준비하는 단계;상기 금속 기재의 일면 상에 제1 수지층 및 제2 수지층을 순차적으로 적층하여, 적층체를 제조하는 단계; 및상기 제2 수지층의 표면 상에 레이저를 조사하는 단계;를 포함하고,800 nm 이상 1100 nm 이하 중 어느 하나의 파장에 대하여, 상기 제1 수지층의 광투과율은 20 % 이상 70 % 이하이고,800 nm 이상 1100 nm 이하 중 어느 하나의 파장에 대하여, 상기 제1 수지층의 광투과율은 상기 제2 수지층의 광투과율보다 작은 이종 소재 접합체의 제조방법.
- 청구항 1에 있어서,800 nm 이상 1100 nm 이하 중 어느 하나의 파장에 대하여, 상기 제1 수지층의 광흡수율은 20 % 이상 50 % 이하인 이종 소재 접합체의 제조방법.
- 청구항 1에 있어서,800 nm 이상 1100 nm 이하 중 어느 하나의 파장에 대하여, 상기 금속 기재 일면의 광반사율은 50 % 이하인 이종 소재 접합체의 제조방법.
- 청구항 1에 있어서,800 nm 이상 1100 nm 이하 중 어느 하나의 파장에 대하여, 상기 제2 수지층의 광투과율은 50 % 이상 80 % 이하인 이종 소재 접합체의 제조방법.
- 청구항 1에 있어서,상기 제1 수지층의 두께는 0.1 mm 이상 5 mm 이하인 이종 소재 접합체의 제조방법.
- 청구항 1에 있어서,상기 레이저는 50 W 이상 2,000 W 이하의 출력의 다이오드 레이저인 이종 소재 접합체의 제조방법.
- 청구항 1에 있어서,상기 레이저는 100 ㎛ 이상 5,000 ㎛ 이하의 스폿 크기, 10 mm/s 이상 1,000 mm/s 이하의 조사 속도, 및 3 회 이하의 조사 횟수로 조사되는 이종 소재 접합체의 제조방법.
- 일면 상에 2 이상의 에칭홈, 상기 에칭홈에 인접하여 구비된 돌출부를 포함하는 금속 기재; 및상기 금속 기재의 일면 상에 순차적으로 적층되는 제1 수지층 및 제2 수지층;을 포함하고,800 nm 이상 1100 nm 이하 중 어느 하나의 파장에 대하여, 상기 제1 수지층의 광투과율은 20 % 이상 70 % 이하이고,800 nm 이상 1100 nm 이하 중 어느 하나의 파장에 대하여, 상기 제1 수지층의 광투과율은 상기 제2 수지층의 광투과율보다 작은 이종 소재 접합체.
- 청구항 8에 있어서,상기 제1 수지층은 상기 에칭홈의 내부, 상기 금속 기재의 표면과 돌출부 사이에 채워져 상기 금속 기재에 접합된 이종 소재 접합체.
- 청구항 8에 있어서,상기 제1 수지층의 두께는 0.1 mm 이상 5 mm 이하인 이종 소재 접합체.
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US17/256,501 US11904553B2 (en) | 2018-09-28 | 2019-09-18 | Method for producing joined body of different materials and joined body of different materials |
EP19865390.9A EP3797985A4 (en) | 2018-09-28 | 2019-09-18 | PROCESS FOR PRODUCING A BONDED BODY FROM DIFFERENT MATERIALS AND BONDED STRUCTURE FROM DIFFERENT MATERIALS |
JP2020570864A JP7053109B2 (ja) | 2018-09-28 | 2019-09-18 | 異種素材接合体の製造方法および異種素材接合体 |
CN201980042636.3A CN112351879B (zh) | 2018-09-28 | 2019-09-18 | 不同材料的接合体的制备方法和不同材料的接合体 |
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CN112351879B (zh) | 2022-11-08 |
US11904553B2 (en) | 2024-02-20 |
CN112351879A (zh) | 2021-02-09 |
EP3797985A4 (en) | 2021-10-20 |
KR20200036363A (ko) | 2020-04-07 |
KR102631904B1 (ko) | 2024-01-31 |
US20210276306A1 (en) | 2021-09-09 |
JP7053109B2 (ja) | 2022-04-12 |
EP3797985A1 (en) | 2021-03-31 |
JP2021528282A (ja) | 2021-10-21 |
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