WO2022025205A1 - 樹脂成形体、樹脂成形体の製造方法及び水廻り機器 - Google Patents

樹脂成形体、樹脂成形体の製造方法及び水廻り機器 Download PDF

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Publication number
WO2022025205A1
WO2022025205A1 PCT/JP2021/028159 JP2021028159W WO2022025205A1 WO 2022025205 A1 WO2022025205 A1 WO 2022025205A1 JP 2021028159 W JP2021028159 W JP 2021028159W WO 2022025205 A1 WO2022025205 A1 WO 2022025205A1
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WO
WIPO (PCT)
Prior art keywords
resin molded
convex portion
molded body
convex
resin
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/JP2021/028159
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English (en)
French (fr)
Japanese (ja)
Inventor
敦史 村田
暁史 中村
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.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management 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 Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to JP2022539574A priority Critical patent/JP7457954B2/ja
Priority to CN202180044046.1A priority patent/CN115702075A/zh
Priority to US18/012,826 priority patent/US20230182372A1/en
Priority to EP21850065.0A priority patent/EP4190482B1/en
Publication of WO2022025205A1 publication Critical patent/WO2022025205A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/16—Surface shaping of articles, e.g. embossing; Apparatus therefor by wave energy or particle radiation, e.g. infrared heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/362—Laser etching
    • B23K26/364—Laser etching for making a groove or trench, e.g. for scribing a break initiation groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
    • B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
    • B23K26/0624—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses using ultrashort pulses, i.e. pulses of 1 ns or less
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/40—Removing material taking account of the properties of the material involved
    • B23K26/402—Removing material taking account of the properties of the material involved involving non-metallic material, e.g. isolators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/18—Sheet panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/30—Organic materials
    • B23K2103/42—Plastics other than composite materials
    • 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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/022—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing characterised by the disposition or the configuration, e.g. dimensions, of the embossments or the shaping tools therefor
    • B29C2059/023—Microembossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0093—Other properties hydrophobic

Definitions

  • the present invention relates to a resin molded body, a method for manufacturing the resin molded body, and a water circulation device.
  • a plurality of rib ridges having a tip portion wider than the base end portion are formed on the surface, and the tip surface of each rib ridge is coated with fluorine to repel.
  • a resin molded product exhibiting liquidity is known (see, for example, Patent Document 1).
  • the fluorine coat deteriorates and the liquid repellency deteriorates.
  • the droplet may fit between the rib protrusions and reduce the liquid repellency.
  • an object of the present invention is to provide a resin molded product having higher quality in terms of liquid repellency.
  • each of the plurality of concave portions and the plurality of convex portions are alternately and repeatedly arranged along a predetermined direction, and are planar. It has a concavo-convex structural surface that exhibits liquid repellency when arranged, and the convex portion has a shape in which the tip portion is enlarged from the base portion.
  • the method for manufacturing a resin molded body is a method for manufacturing a resin molded body for manufacturing the above-mentioned resin molded body, and laser processing is performed on the surface of the resin base material. This forms a concavo-convex structural surface.
  • the above resin molded body is provided.
  • FIG. 1 is a perspective view showing a bathroom in which the resin molded product according to the first embodiment is used.
  • FIG. 2 is an enlarged plan view showing the surface structure of the floor according to the first embodiment.
  • FIG. 3 is a cross-sectional view of the cut surface including lines III-III in FIG.
  • FIG. 4 is a cross-sectional view showing a state in which a droplet has entered between a pair of adjacent convex portions according to the first embodiment.
  • FIG. 5 is a plan view showing the uneven structure surface according to the second embodiment.
  • FIG. 6 is an enlarged cross-sectional view showing the outer peripheral surface of the convex portion according to the third embodiment.
  • each figure is a schematic diagram and is not necessarily exactly illustrated. Therefore, for example, the scales and the like do not always match in each figure. Further, in each figure, substantially the same configuration is designated by the same reference numeral, and duplicate description will be omitted or simplified.
  • FIG. 1 is a perspective view showing a bathroom 100 in which the resin molded body 1 according to the first embodiment is used.
  • the bathroom 100 is an example of a water supply device, and has a floor 101 having a drain port 102, a wall 103, and a bathtub 104. At least one of the floor 101, the wall 103, and the bathtub 104 may be formed of the resin molded body 1, but in the present embodiment, the case where the floor 101 is formed of the resin molded body 1 will be illustrated and described. ..
  • FIG. 2 is an enlarged plan view showing the surface structure of the floor 101 according to the first embodiment.
  • FIG. 3 is a cross-sectional view of the cut surface including lines III-III in FIG.
  • the surface of the resin molded body 1 is an uneven structure surface 30 having a so-called reentrant structure.
  • the concave-convex structure surface 30 is a surface in which a plurality of convex portions 31 and a plurality of concave portions 32 are alternately and repeatedly arranged along a predetermined direction, and these are arranged in a plane to exhibit liquid repellency. be.
  • the concave-convex structure surface 30 has a plurality of convex portions 31 arranged in a matrix in a plan view.
  • the convex portion 31 has a substantially square shape in a plan view.
  • Each convex portion 31 has substantially the same shape.
  • the convex portion 31 has a shape in which the tip portion thereof is enlarged from the base portion. Specifically, the size of the convex portion 31 in the axial direction is larger at the tip portion than at the base portion of the convex portion 31.
  • the convex portion 31 is formed in an inverted regular quadrangular frustum shape.
  • the portion between the plurality of convex portions 31 in a predetermined direction forms the concave portion 32.
  • the recesses 32 can be said to be one recess 32 because they are lattice-shaped and continuous when viewed as a whole, but can be said to be a plurality of recesses 32 because they are divided into the convex portions 31 when viewed only in a predetermined direction. That is, the plurality of concave portions 32 and the plurality of convex portions 31 are alternately arranged at a predetermined pitch in both the vertical direction and the horizontal direction.
  • the width f1 is the width of the tip of the convex portion 31.
  • the width f2 is the width of the tip of the concave portion 32, that is, the width between the tips of the pair of adjacent convex portions 31.
  • the width f1 and the width f2 are on the order of nanometers or micrometer.
  • D ⁇ / f1.
  • ⁇ is the pure water static contact angle of the base material itself forming the concave-convex structure surface 30.
  • ⁇ ' is a pure water static contact angle of the uneven structure surface 30 itself.
  • the width f1 of the convex portion 31 and the width f2 of the concave portion 32 are determined so that ⁇ 'exceeds 120 ° by simulating using the equation (1).
  • the uneven structure may be non-uniform within the uneven structure surface 30.
  • a first region 30a and a pair of second regions 30b having different predetermined pitches ⁇ are provided in the concave-convex structure surface 30, a first region 30a and a pair of second regions 30b having different predetermined pitches ⁇ are provided.
  • the pair of second regions 30b are arranged so as to sandwich the first region 30a in the lateral direction.
  • the first region 30a and the second region 30b are regions in which the static contact angles of pure water differ by 5 ° or more.
  • the width f1 of the convex portion 31 and the width f2 of the concave portion 32 are determined based on the equation (1) so that the pure water static contact angle of the first region 30a is 121 °. ..
  • the width f1 of the convex portion 31 and the width f2 of the concave portion 32 are determined based on the equation (1) so that the pure water static contact angle of the second region 30b is 150 °.
  • the liquid is liquid from the second region 30b toward the first region 30a where the pure water static contact angle is relatively low. You can collect drops. If a plurality of droplets are collected and integrated, the weight of the droplets increases and the droplets easily slide down, so that the liquid repellency on the uneven structure surface 30 can be improved.
  • the pure water static contact angle differs by 5 ° or more between the first region 30a and the second region 30b, the pure water static contact angle can be smoothly changed from the high second region 30b to the low first region 30a. It is possible to collect droplets.
  • the difference in the static contact angle of pure water between the first region 30a and the second region 30b is 30 °, it is possible to collect droplets more smoothly toward the first region 30a. Is.
  • each convex portion 31 has an inverted quadrangular pyramid shape whose tip portion is enlarged from the base portion. Therefore, the outer peripheral surface of each convex portion 31 has a shape that expands toward the tip portion. That is, the outer peripheral surface of the convex portion 31 has a shape in which the distance from the central axis of the convex portion 31 to the edge thereof gradually increases from the base portion to the tip portion.
  • FIG. 4 is a cross-sectional view showing a state in which the droplet L has entered between the pair of adjacent convex portions 31 according to the first embodiment.
  • the droplet L when the droplet L enters between the pair of adjacent convex portions 31, the droplet L has a shape that protrudes toward the bottom surface of the concave portion 32 due to surface tension in the concave portion 32.
  • a force F along the tangent line of the surface of the droplet L is generated on the outer peripheral surface of the convex portion 31. Since this force F is a force toward the tip end portion of the convex portion 31, the droplet L in the concave portion 32 tends to move toward the tip end portion of the convex portion 31 by this force F. That is, in order to prevent the droplet L from falling further from the recess 32, the droplet L withstands external factors such as external pressure and vibration, and high liquid repellency is maintained and exhibited.
  • This base material may be made of any resin as long as it can be laser-processed.
  • the laser-processable resin include thermoplastic resins and the like.
  • the thermoplastic resin include polyolefin-based resins, polyamide-based resins, elastomer-based (styrene-based, olefin-based, polyvinyl chloride (PVC) -based, urethane-based, ester-based, and amide-based) resins, polyester-based resins, and engineering plastics.
  • the base material may contain a thermosetting resin.
  • the thermosetting resin include epoxy resin, unsaturated polyester resin, vinyl ester resin, phenol resin, urethane resin, melamine resin, urea resin, maleimide resin, cyanate ester resin, alkyd resin, and addition curable polyimide resin.
  • examples include thermosetting acrylic resin.
  • the thermosetting resin may contain one of these resins alone, or may contain a mixture of a plurality of resins containing these resins as main components. Thereby, the heat resistance of the resin molded body 1 can be enhanced.
  • the molded body is the resin molded body 1, it is suitable for laser processing.
  • the resin molded body 1 contains a thermosetting resin, the heat resistance of the resin molded body 1 can be enhanced.
  • the surface of the base material is laser-processed to form the uneven structure surface 30.
  • the surface of the base material is laser-processed so that the plurality of concave portions 32 and the plurality of convex portions 31 are alternately arranged in a plane at a predetermined pitch along a predetermined direction.
  • the uneven structure surface 30 is formed.
  • a short pulse laser is irradiated on the surface of the base material.
  • the pulse width of the short pulse laser is preferably nanoseconds or less.
  • each convex portion 31 has an inverted quadrangular pyramid shape.
  • the laser processing is an ablation processing. In the case of ablation processing, heat damage to the processing target can be suppressed. Further, it is possible to sharpen the cross-sectional shape of the convex portion 31 and the concave portion 32.
  • the outer peripheral surface of the convex portion 31 has a shape in which the distance from the central axis of the convex portion 31 to the end edge gradually increases from the base portion to the tip portion. Therefore, a force F toward the tip of the convex portion 31 can be applied to the droplet L that has entered the concave portion 32. Due to this force F, the droplet L in the concave portion 32 tends to move toward the tip end portion of the convex portion 31. That is, since the droplet L tends to escape from the recess 32, high liquid repellency is maintained.
  • the fact is that the static contact angle of pure water exceeding 120 ° cannot be realized due to its chemical properties.
  • the pure water static contact angle cannot exceed 120 °.
  • the pure water static contact angle between the first region 30a and the second region 30b can be determined. Can be different. As a result, droplets can be collected from the second region 30b toward the first region 30a where the static contact angle of pure water is relatively low. If a plurality of droplets are collected and integrated, the weight of the droplets increases and the droplets easily slide down, so that the liquid repellency on the uneven structure surface 30 can be improved.
  • the pure water static contact angle between the first region 30a and the second region 30b is different by 5 ° or more, the difference causes the second region toward the first region 30a where the pure water static contact angle is relatively low. Droplets can be collected more smoothly from 30b.
  • the uneven structure surface 30 of the resin molded body 1 is formed by laser processing, the uneven structure surface 30 can be formed without using an organic material or the like that easily affects the environment.
  • the laser processing is an ablation processing
  • the concave-convex structure surface 30 in which a plurality of convex portions 31 are arranged in a matrix is exemplified.
  • the concave-convex structure surface 30A in which a plurality of convex portions 31 are arranged in a striped pattern is exemplified.
  • the same parts as those in the first embodiment may be designated by the same reference numerals and the description thereof may be omitted.
  • FIG. 5 is a plan view showing the uneven structure surface 30A according to the second embodiment.
  • FIG. 5 is a diagram corresponding to FIG. 2.
  • each convex portion 31a and each concave portion 32a are formed in a straight line.
  • Each convex portion 31a is formed in a trapezoidal shape in which the tip portion thereof is enlarged from the base portion in the longitudinal direction view.
  • the plurality of convex portions 31a and the plurality of concave portions 32a are repeatedly and alternately arranged at a predetermined pitch. Even in this case, if the above conditions are satisfied, the concave-convex structure surface 30A can be used as a liquid-repellent surface.
  • the concave portions and the convex portions may have any shape in a plan view as long as they are alternately and repeatedly arranged at a predetermined pitch.
  • the convex portion 31 has an inverted regular quadrangular frustum shape.
  • the outer peripheral surface of the convex portion may have a shape in which the distance from the central axis of the convex portion to the edge thereof gradually increases from the base portion to the tip portion.
  • the outer peripheral surface of the convex portion has a convex curved surface shape is illustrated.
  • FIG. 6 is an enlarged cross-sectional view showing the outer peripheral surface of the convex portion 31b according to the third embodiment. Specifically, FIG. 6 is a diagram corresponding to FIG. 4. As shown in FIG. 6, the outer peripheral surface of the convex portion 31b has a convex curved surface shape protruding outward. In this case, as shown in FIG. 6, when the droplet L enters between the pair of adjacent convex portions 31b, the droplet L has a shape protruding toward the bottom surface of the concave portion 32b due to surface tension in the concave portion 32b. .. In the droplet L, a force F along the tangent line of the surface of the droplet L is generated on the outer peripheral surface of the convex portion 31b.
  • FIG. 6 a plurality of surface positions of the droplet L for each degree of progress into the recess 32b are shown.
  • the surface position that has not progressed most in the recess 32b is the droplet L, and as the degree of progress progresses, it becomes the droplet L1 and the droplet L2.
  • the force F is tilted toward the tip portion of the convex portion 31b as the droplets L, L1 and L2 advance into the concave portion 32b. It fluctuates to.
  • the droplets L, L1 and L2 try to enter the concave portion 32b, the more the force F tilted toward the tip of the convex portion 31b acts on the droplets L, L1 and L2. Attempts to move towards the tip of 31b. As a result, the droplets L, L1 and L2 can easily escape from the recess 32b, so that high liquid repellency is exhibited.
  • the outer peripheral surface of the convex portion 31b has a spherical shape, the above-mentioned fluctuation of the force F can be made more remarkable, which is preferable.
  • each convex portion 31 is an inverted quadrangular pyramid
  • the shape of the convex portion has a flat tip surface and the tip portion is enlarged more than the base portion. Any shape is acceptable. Examples of other shapes of the convex portion include an inverted polygonal frustum, an inverted truncated cone, and an inverted elliptical pyramid other than the inverted regular quadrangular frustum.
  • the bathroom 100 is exemplified as a water supply device.
  • the water-related device may be any device as long as it can get wet with a liquid.
  • Examples of other water-related devices include devices arranged in kitchens, washrooms, toilets, and baths.
  • Examples of the equipment arranged in the kitchen include a kitchen counter, a sink, a range hood, and the like.
  • Examples of the equipment arranged in the washroom include a washbasin, a faucet, and the like.
  • Examples of the equipment arranged in the toilet include a toilet seat and a toilet bowl.
  • Examples of the equipment arranged in the bath include a bathtub, a bathroom door, and the like.
  • the water-related member may be a device that can get wet with a liquid while being installed outdoors.
  • the resin molded body 1 is exemplified, but the resin molded body may be formed of any resin material as long as it is a material capable of laser processing.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Laser Beam Processing (AREA)
PCT/JP2021/028159 2020-07-31 2021-07-29 樹脂成形体、樹脂成形体の製造方法及び水廻り機器 Ceased WO2022025205A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2022539574A JP7457954B2 (ja) 2020-07-31 2021-07-29 樹脂成形体、樹脂成形体の製造方法及び水廻り機器
CN202180044046.1A CN115702075A (zh) 2020-07-31 2021-07-29 树脂成形体、树脂成形体的制造方法以及用水设备
US18/012,826 US20230182372A1 (en) 2020-07-31 2021-07-29 Resin molded body, method for producing resin molded body, and wet-area equipment
EP21850065.0A EP4190482B1 (en) 2020-07-31 2021-07-29 Resin molded article, method for producing resin molded body, and wet-area equipment.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020129948 2020-07-31
JP2020-129948 2020-07-31

Publications (1)

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WO2022025205A1 true WO2022025205A1 (ja) 2022-02-03

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US (1) US20230182372A1 (https=)
EP (1) EP4190482B1 (https=)
JP (1) JP7457954B2 (https=)
CN (1) CN115702075A (https=)
WO (1) WO2022025205A1 (https=)

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CN115702075A (zh) 2023-02-14
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JPWO2022025205A1 (https=) 2022-02-03
US20230182372A1 (en) 2023-06-15
EP4190482A4 (en) 2024-01-10
JP7457954B2 (ja) 2024-03-29

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