JP2016187953A - Resin member and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin member which enhances appearance quality of a gap between adjacent members and prevents formation of a thick portion in a coating layer of a surface bent portion, and to provide a method for producing the same.SOLUTION: There is provided a resin member 10 in which a coating layer 3 is formed on a resin substrate 1 having a surface bent portion 4 the surface of which is bent at a curvature radius R1 of 3 mm or less. In the resin member, in a vertical cross-section of the resin member 10 where the coating layer 3 is arranged above the resin substrate 1, the resin substrate 1 has a step portion 40 of which the surface is raised or sunk on the surface bent portion 4, a step x of the step portion 40 is 0.02-2.5 mm, a drop y (mm) from a bend start point Q1 of the surface bent portion 4 to the step portion 40 and the radius R1 (mm) of curvature of the surface bent portion 4 satisfy a relational expression: R1×0.2≤y≤R1×1.8. There is also provided a method for producing the resin member including forming the resin substrate 1, and then forming the coating layer 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a resin member having a coating layer on a resin substrate and a method for producing the same.

  A resin member having a coating layer on a resin base material is often used as a composite material in various daily fields such as a vehicle member, an optical member, and a building member from the viewpoint of the recent weight saving and energy saving. Yes.

  For example, in a vehicle member, it is conventionally known to form a coating layer such as a hard coat layer on the surface of a resin window as a resin base (for example, Patent Document 1).

  Specifically, an example of the rear window 100 in the prior art is shown in FIGS. FIG. 8A is a schematic overall view when the rear window of the automobile is viewed from the outside of the vehicle, and FIG. 8B is a schematic cross-sectional view when the AA cross section in FIG. 8C is an enlarged cross-sectional view of the left end portion in FIG. 8B, and FIG. 8D is an enlarged schematic view of the surface bent portion 104 in FIG. 8C. The hard coat layer 103 is omitted in FIGS. 8A to 8B, and as shown in FIG. 8C, a black resin including the surface of the surface bent portion 104 and the end face 116 in the transparent resin substrate 101. In general, it is formed on the entire surface 115 opposite to the surface on which the layer 102 is formed. As shown in FIGS. 8A to 8B, the black resin layer 102 is formed in an annular shape at the peripheral end portion of the transparent resin base material 101. By applying an adhesive to the surface of the black resin layer 102 and fixing the rear window 100, the adhesive is prevented from being seen through from the outside of the vehicle.

Special table 2014-502229 gazette

  However, when the hard coat layer 103 is formed on the resin base 101 as described above, the hard coat layer is formed at the surface bent portion 104 at the end of the resin base 101 as shown in FIGS. The thick part 105 based on the dripping of the forming paint was formed. The thick part 105 not only causes the appearance defect, but also easily breaks, and thus causes a crack from the thick part 105 toward the center of the rear window 100.

  When the radius of curvature R of the surface bent portion 104 was more than 3 mm, formation of a thick portion of the hard coat layer 103 could be prevented, but a new appearance quality problem that a gap with an adjacent member was seen wide occurred. Specifically, when the rear window obtained using a resin base material having a curved surface portion having a curvature radius R of more than 3 mm at the end portion was mounted on an automobile, a wide gap was seen between adjacent members.

  The present invention improves the appearance quality of the gap between adjacent members by setting the radius of curvature R of the surface bent portion to 3 mm or less, and prevents the formation of a thick portion in the coating layer of the surface bent portion It aims at providing a member and its manufacturing method.

The present invention
A resin member in which a coating layer is formed on a resin base material having a surface bending portion where the surface bends at a curvature radius R1 of 3 mm or less,
In the vertical cross section of the resin member in which the coating layer is disposed above the resin base material,
The resin base material has a stepped portion formed on the surface bent portion, the surface rising or sinking,
The step x of the stepped portion is 0.02 to 2.5 mm;
The drop y (mm) from the bending start point of the surface bent portion to the stepped portion is a curvature radius R1 (mm) of the surface bent portion and the following relational expression:
R1 × 0.2 ≦ y ≦ R1 × 1.8
It is related with the resin member which satisfy | fills.

  The present invention also relates to a method for manufacturing the resin member, wherein the resin base material is formed and then the coating member is formed.

  Since the curvature radius R of the surface bending part is 3 mm or less, the resin member of the present invention is excellent in the appearance quality of the gap between adjacent members. Furthermore, formation of a thick part in the coating layer of the surface bending part is prevented.

(A) is a general | schematic vertical sectional view of an example of the resin member of this invention, Comprising: It is an expanded sectional view of the left end part of the said resin member, (B) is one which further expanded the surface bending part of (A). FIG. It is a general | schematic vertical sectional view of another example of the resin member of this invention, Comprising: It is the partially expanded view which expanded the surface bending part in the edge part of the said resin member. It is a general | schematic vertical sectional view of another example of the resin member of this invention, Comprising: It is the partially expanded view which expanded the surface bending part in the edge part of the said resin member. It is a general | schematic vertical sectional view of another example of the resin member of this invention, Comprising: It is the partially expanded view which expanded the surface bending part in the edge part of the said resin member. It is a general | schematic vertical sectional view of another example of the resin member of this invention, Comprising: It is the partially expanded view which expanded the surface bending part in the edge part of the said resin member. It is a general | schematic vertical sectional view of another example of the resin member of this invention, Comprising: It is the partially expanded view which expanded the surface bending part in the edge part of the said resin member. (A) is a schematic whole outline figure of an example of the window member for vehicles of the present invention when looking at the window member for vehicles from the outside of a vehicle, and (B) when looking at the AA section in (A) in the direction of an arrow. (C) is an expanded sectional view of the left end part of the window member for vehicles in (B). (A) is a schematic whole outline view of the conventional rear window when the rear window of the automobile is viewed from the outside of the vehicle, and (B) is a schematic sectional view when the AA cross section in (A) is viewed in the direction of the arrow. (C) is an enlarged cross-sectional view of the left end portion of the rear window in (B), and (D) is a partially enlarged view in which the surface bent portion in (C) is further enlarged.

[Resin member]
In the resin member of the present invention, a coating layer is formed on a resin base material having a surface bent portion whose surface is bent at a specific radius of curvature R1. Hereinafter, although this invention is demonstrated using FIGS. 1-7, unless it mentions specially, the same code | symbol or symbol shall show the same member or the same meaning content except a shape differing. The terms indicating the direction or position such as “up”, “bottom”, “high” or “low” used directly or indirectly in the present specification are respectively positioned above the resin substrate. Thus, it corresponds to “up”, “down”, “high” or “low” in the vertical cross section of the resin member arranged on the horizontal plane.

  As shown in FIGS. 1A and 1B, the resin member 10 of the present invention has a surface bent portion 4 in the resin base material 1 on which the coating layer 3 is formed. The surface bent portion 4 is where the surface of the resin substrate 1 is bent with a radius of curvature R1 of 3 mm or less. When the curvature radius R1 exceeds 3 mm, even if a coating layer is formed on the surface of the surface bent portion, a thick portion is hardly formed. When the curvature radius R1 changes in the surface bending portion 4, the curvature radius R1 is more specifically the surface bending portion from the bending start point Q1 (upper side) where the surface bending starts to a drop (downward in FIG. 1) to 500 μm. It shall mean the minimum convex radius of curvature on the four surfaces. The surface bent portion 4 is normally formed continuously in the front and back direction on the paper surface of FIGS. 1 (A) and 1 (B).

  The degree of bending of the entire surface in the surface bending portion 4 is not particularly limited. For example, the angle θ formed by the bent surface in FIG. 1A is usually 60 to 120 °, particularly 70 to 110. °. 1 (A) and 1 (B), the resin member 10 has the surface bent portion 4 at the end of the resin base material 1, but is not limited to this, for example, the center of the resin base material. The surface may have a surface bent portion 4.

  The resin member 10 of the present invention has a stepped portion 40 in the surface bent portion 4. The stepped portion 40 is a portion where a height difference is formed on the surface. Due to the presence of the stepped portion 40, the coating liquid is accumulated in the stepped portion 40 when the coating layer 3 is formed, and the coating liquid is drawn by its surface tension. As a result, formation of dripping at the surface bent portion 4 is prevented, and formation of a thick portion is also prevented. The step portion 40 is formed continuously in the front and back direction on the paper surface of FIG. In FIG. 1B, the stepped portion 40 is a raised stepped portion having a raised surface, and has a protruding structure (return structure).

  The step x of the stepped portion 40 is 0.02 to 2.5 mm, preferably from the viewpoint of further sufficiently preventing the formation of the thick portion and further improving the appearance quality of the gap with the adjacent member. 0.02 to 0.8 mm. If the level difference x is too small, the coating liquid collected on the level difference part is small, and therefore the coating liquid on the surface bent part surface cannot be drawn sufficiently. For this reason, formation of a thick part cannot be prevented. If the stepped portion x is too large, the stepped portion can be seen in the gap between the resin member and the adjacent member, so that the appearance quality is deteriorated.

  The step x is a difference in height of the step portion 40 itself, specifically, from the inflection point P1 between the curve of the radius of curvature R1 defining the surface bending portion 4 and the step of the step portion 40 to the protrusion point P2. It is the horizontal distance.

The drop y (mm) of the surface bent portion 4 satisfies the following radius of curvature R1 (mm) of the surface bent portion 4 and the following relational expression (1), further sufficiently prevents the formation of the thick portion, and is an adjacent member. From the viewpoint of further improving the appearance quality of the gap, the following relational expression (2) is preferably satisfied:
R1 × 0.2 ≦ y ≦ R1 × 1.8 (1)
R1 × 0.2 ≦ y ≦ R1 × 1.2 (2)
If the drop y is too small, the stepped portion can be seen in the gap between the resin member and the adjacent member, so that the appearance quality is deteriorated. If the drop y is too large, the stepped portion is separated, so that the coating liquid accumulated in the stepped portion cannot sufficiently attract the coating liquid on the surface bent portion surface. For this reason, formation of a thick part cannot be prevented.

  The drop y is a difference in height from the bending start point Q1 (upper side) where the surface starts to bend to the stepped portion 40, specifically, from the bending start point Q1 to the lowest point Q2 of the stepped portion 40. Means vertical distance.

  In FIG. 1B, the stepped portion 40 has a downwardly convex arc shape, but may have a linear shape as shown in FIG. 2, or may protrude upward as shown in FIG. These arc shapes may be used, or a composite shape of these may be used. 2 and 3, R1, x, and y shown in these drawings correspond to R1, x, and y shown in FIG. 1B, respectively.

When the stepped portion 40 has an arc shape as shown in FIG. 1B or FIG. 3, the radius of curvature R2 of the stepped portion 40 is not particularly limited, and usually x / 2 or more with respect to the step x. For example, it may be 0.02 to 2 mm, particularly 0.03 to 1.2 mm. The radius of curvature R2 of the stepped portion 40 preferably satisfies the following relational expression (x1) with the radius of curvature R1 of the surface bent portion 4 from the viewpoint of sufficiently drawing the coating liquid further more preferably. Satisfy equation (x2):
R2 <R1 (x1)
R2 ≦ R1 × 0.8 (x2)

  In FIG. 1 (B), FIG. 2 and FIG. 3, the stepped portion 40 is a raised stepped portion with a raised surface, but as shown in FIGS. Part. The sinking-type step portion has a pull-in structure symmetrically with the raised step portion. In the subsidence type step, P2 indicates a pull-in point. Even if it is a sedimentation type | mold level | step difference part, as shown in FIGS. 4-6, a coating liquid accumulates in the said level | step-difference part 40 at the time of formation of the coating layer 3, and draws a coating liquid with the surface tension.

  The subsidence-type stepped portion may have a downwardly convex arc shape as shown in FIG. 4, or a linear shape as shown in FIG. As shown in FIG. 6, it may have an upwardly convex arc shape, or a composite shape thereof. 4 to 6, R1, x, y, and R2 shown in these drawings respectively correspond to R1, x, y, and R2 shown in FIG.

  In the present invention, a stepped portion 40 that is preferable from the viewpoint of sufficiently preventing the formation of the thick portion is a stepped portion having the shape shown in FIG.

The resin constituting the resin substrate 1 may be any thermoplastic polymer or thermosetting polymer, and a thermoplastic polymer is usually used from the viewpoint of moldability. As the thermoplastic polymer, any polymer having thermoplasticity can be used. Examples include the following polymers and mixtures thereof:
Polyolefin resins such as polyethylene and polypropylene, and modified products thereof;
Polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polylactic acid (PLA);
Polyacrylate resins such as polymethyl methacrylate resin (PMMA);
Polyether resins such as polyether ether ketone (PEEK) and polyphenylene ether (PPE);
Polyacetal (POM);
Polyphenylene sulfide (PPS);
PA6, PA66, PA11, PA12, PA6T, PA9T, MXD6 and other polyamide-based resins (PA);
Polycarbonate resin (PC);
Polyurethane resin;
A fluoropolymer resin; and a liquid crystal polymer (LCP).

Any polymer having thermosetting properties can be used as the thermosetting polymer. Examples include the following polymers and mixtures thereof:
Phenolic resin;
Epoxy resin;
Melamine resin;
Urea resin.

  As the resin base 1, a transparent resin base is used particularly when a resin member is used as a vehicle window member. As the resin constituting the transparent resin base material, a transparent polymer such as a polycarbonate-based resin is used among the above polymers.

  The resin base material 1 may contain any additive. Examples of such additives include colorants and antioxidants. In particular, when the resin member is used as a vehicle window member, the transparent resin base material does not contain a colorant.

  The thickness (T1) of the resin base material 1 is not particularly limited, and is usually 1 to 20 mm, preferably 2 to 15 mm, more preferably 3 to 10 mm, and particularly when the resin member is used as a vehicle window member. Is most preferably 3 to 5 mm.

  The coating layer 3 may be any layer as long as it is formed by a method including applying a coating liquid (coating layer forming material). For example, the coating layer 3 may be various types such as a hard coat layer and an antireflection layer. It may be a functional layer. The coating layer 3 may be one or more layers. A preferred coating layer 3 is a hard coat layer.

  As the coating layer 3, a transparent coating layer is used particularly when a resin member is used as a vehicle window member. As resin which comprises a transparent coating layer, the below-mentioned reactive compound, its polymer, and hardened | cured material are mentioned, for example.

  The thickness (after drying) of the coating layer 3 is usually 1 to 100 μm, preferably 2 to 50 μm. When the coating layer 3 consists of one or more layers, those total thickness should just be in the said range.

[Production method of resin member]
The resin member 10 can be manufactured by a method of forming the coating layer 3 after forming the resin base material 1.

  As long as the formation method of the resin base material 1 can be shape | molded in the above-mentioned predetermined shape, what kind of method may be employ | adopted. The resin base material 1 is molded using, for example, an injection molding method, a press molding method, or the like using a mold processed into a shape corresponding to a predetermined shape. A preferable method for producing the resin base material 1 from the viewpoint of moldability is an injection molding method.

  The coating layer 3 can be usually formed by applying a coating liquid to the surface 15 including the surface of the surface bent portion 4 and the end surface 151 of the resin base material 1, drying, and then polymerizing or curing as desired. .

  As the coating solution, any coating solution for forming a coating layer can be used.

  When the coating layer is a hard coat layer, the coating liquid for forming a hard coat layer usually contains at least a reactive compound. Examples of the reactive compound include a polymerizable monomer having a polymerizable double bond and a reactive silicone resin having a reactive group.

  Examples of the polymerizable monomer include acrylic monomers, olefin monomers, vinyl ester monomers, styrene monomers, vinyl halide monomers, and the like. Acrylic monomers are preferred.

Specific examples of acrylic monomers include, for example, dimethylol-tricyclodecane diacrylate, dimethylol-tricyclodecane dimethacrylate, methyl acrylate, ethyl acrylate, propyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, etc. Is mentioned.
Specific examples of the olefin monomer include ethylene, propylene, isobutylene, hexene and the like.
Examples of the vinyl ester monomer include vinyl acetate and vinyl benzoate.
Specific examples of the styrene monomer include styrene, α-methylstyrene, α-ethylstyrene, α-chlorostyrene, α-bromostyrene, 2,5-dichlorostyrene, and the like.
Specific examples of the vinyl halide monomer include vinyl chloride, vinyl fluoride, tetrafluoroethylene, and the like.

  The reactive silicone resin is a compound containing a reactive group and a siloxane skeleton. Examples of the reactive group include (meth) acryloyl group; vinyl group; glycidyl group; hydroxyl group; and halogen atoms such as fluorine atom, chlorine atom and bromine atom. The reactive silicone resin has one or more reactive groups selected from these.

  Specific examples of the reactive silicone resin include, for example, a silsesquioxane resin having a so-called cage structure, ladder structure, or random structure. Such a silsesquioxane resin is available as, for example, a commercially available silsesquioxane (Sigma-Aldrich).

The coating liquid may contain a polymerization initiator and a solvent.
As the polymerization initiator, any compound used as a thermal polymerization initiator or a photopolymerization initiator in the plastics field can be used.

  The solvent is not particularly limited as long as it can dissolve the reactive compound.

  The viscosity of the coating solution is not particularly limited, but is preferably 1000 mPas or less, more preferably 1 to 1000 mPas, from the viewpoint of further sufficiently preventing the formation of the thick portion in the surface bent portion 4. More preferably, it is ˜300 mPas. If the viscosity is too low, it will be difficult to hold the paint and it will be difficult to paint. If the viscosity is too high, it becomes difficult to ensure the smoothness of the painted surface.

  The viscosity is a value measured at 25 ° C. using an R / S-CCPplus double cylinder type (manufactured by Brookfield).

  Although the surface tension of the coating liquid is not particularly limited, it is preferably 80 mN / m or less, and preferably 10 to 80 mN / m from the viewpoint of further sufficiently preventing the formation of the thick portion in the surface bent portion 4. Is more preferably 10 to 50 mN / m. If the surface tension is too low, it is difficult to ensure the smoothness of the painted surface. If the surface tension is too high, it becomes difficult to ensure wettability (repelling), and it becomes difficult to solve the thick part of the coating film at the edge part.

  As the surface tension, a value measured at 25 ° C. using a Dyna-meter (manufactured by BYK) is used.

  Polymerization and curing may be performed by heating or light irradiation depending on the kind of the polymerization initiator.

[Uses of resin members]
The resin member of the present invention is useful as a vehicle member, an optical member, a building member, or the like.

  Examples of the vehicle member include vehicle window members such as a roof window, a front window, a triangular window, a rear window, a rear quarter window, and a back window.

  The case where the resin member of the present invention is used as a vehicle window member (rear window) will be described in detail.

  In the vehicle window member of the present invention, the resin base material 1 is the transparent resin base material, and the coating layer 3 is the transparent coating layer.

  An example of the vehicle window member (rear window) of the present invention is shown in FIG. FIG. 7A is a schematic overview of the vehicle window member 50 when the vehicle window member is viewed from the outside of the vehicle, and FIG. 7B is a cross-sectional view taken along the line AA in FIG. FIG. 7C is an enlarged sectional view of the left end portion of the vehicle window member in FIG. 7B. Note that the right end portion omitted in FIG. 7C has a left-right symmetric structure with the structure of the left end portion in FIG. 7C.

  The vehicle window member 50 shown in FIGS. 7A to 7C is characterized in that an enlarged cross-sectional view of the surface bent portion 4 in FIG. 7C is the same as that in FIG. The enlarged cross-sectional view of the surface bent portion 4 in FIG. 7C may be the same as in FIGS. The vehicle window member 50 shown in FIG. 7 is the same as the resin member 10 described above except that the resin base material 1 has the engraved portion 16 on the lower surface and the resin layer 2 is formed annularly on the periphery of the engraved portion 16. It is. For this reason, the description about the member common to FIG. 1 is abbreviate | omitted, and hereafter demonstrates the manufacturing method of the window member 50 for vehicles, and the resin layer 2 in detail.

  The vehicle window member 50 of the present invention can be manufactured by forming the coating layer 3 after forming the resin layer 2 on the resin substrate 1.

  The formation method of the resin base material 1 and the formation method of the coating layer 3 are the same as those described above.

  Any method may be adopted as a method of forming the resin layer 2. The resin layer 2 is molded using, for example, an injection molding method, a press molding method, or the like using a mold processed into a predetermined shape.

  A preferable production method of the resin base material 1 and the resin layer 2 from the viewpoint of moldability is a method of forming the resin base material 1 by the injection molding method and then forming the resin layer 2 by the injection molding method.

  As the resin constituting the resin layer 2, the same resin exemplified as the resin constituting the resin substrate 1 can be used, and a thermoplastic polymer is usually used from the viewpoint of moldability. As a thermoplastic polymer, the same polymer illustrated in the said resin base material 1 and those mixtures are mentioned.

  As the resin layer 2, a colored resin layer, preferably a black resin layer is used. By applying an adhesive to the surface of the colored resin layer and fixing the window member for a vehicle, it is possible to prevent the adhesive from being seen through from the outside of the vehicle. As the resin constituting the colored resin layer, among the same polymers exemplified in the resin substrate 1, polycarbonate resins, polyester resins, and mixtures thereof are preferably used.

  Any additive may be contained in the resin layer 2. As such an additive, the same additive illustrated in the resin base material 1 is mentioned. The resin layer 2 usually contains at least a colorant as an additive. A colorant such as a black colorant is used as the colorant. Examples of the black colorant include carbon black.

  The thickness (T2) of the resin layer 2 is not particularly limited, and is usually 1 to 20 mm, preferably 2 to 15 mm, more preferably 2 to 10 mm, and most preferably 2 to 4 mm.

[Experiment A]
(Examples A1 to A25 and Comparative Examples A1 to A12)
A vehicle window member 50 shown in FIGS. 7A to 7C was manufactured. The total width shown in FIG. 7A = 1000 mm, θ = 85 °, T1 = 4 mm and T2 = 3 mm shown in FIG. 7C. The enlarged cross-sectional view of the surface bent portion 4 in FIG. 7C is the same as that in FIG.

  In each of the examples / comparative examples, R1, x, y, and R2 in FIG. 1B in the surface bent portion 4 had values shown in Table 1.

A specific manufacturing method is shown below.
Polycarbonate was melted, and a resin substrate 1 having a predetermined surface bent portion 4 was manufactured by an injection molding method, and cooled to room temperature. A mixed polymer of polycarbonate and polyethylene terephthalate and carbon black are melted and mixed, and injected into a mold containing the resin base material 1, thereby forming a resin layer 2 having a predetermined shape on the resin base material 1. did.

Formation of Hard Coat Layer The hard coat layer 3 was formed on the surface 15 of the resin substrate 1 (see FIG. 7C). Specifically, a photopolymerization initiator was added to and mixed with a propylene glycol monomethyl ether (PGM) solution of dimethylol-tricyclodecane diacrylate (solid content concentration 30% by weight) to prepare a hard coat layer forming material (viscosity 5 mPas, Surface tension 29 mN / m). This hard coat layer forming material was applied to the surface 15 including the surface of the surface bent portion 4 and the end surface 151 and dried at 100 ° C. for 6 minutes. The coating film was cured by irradiating ultraviolet rays at an illuminance of 193 mW / cm ² and an integrated light quantity of 1998 mJ / cm ² to form a hard coat layer having an average thickness of 10 μm.

Evaluation / Thickness Uniformity An area from the bending start point Q1 (upper side) where the surface bending starts at the surface bending part to a drop of 0.75y was defined as a measurement area. In this measurement region, the thickness of the hard coat layer was measured at arbitrary 100 points, the maximum value and the average value were obtained, and evaluated according to the following criteria.
○: Maximum value ≦ average value × 1.5;
Δ: Maximum value ≦ average value × 2 (no problem in practical use);
×: Maximum value> average value × 2.

Appearance of gaps between adjacent members Adhesive was applied to the surface of the resin layer 2 of the window member, and this window member was incorporated into the vehicle body as a rear window and fixed. The gap between the window member and the adjacent member (vehicle body) was visually observed and evaluated according to the following criteria.
○: The step was not visible at all and there was no sense of incongruity;
Δ: The level difference was only slightly visible, and the sense of incongruity was slight (no problem in practical use);
X: The step portion was clearly visible, and there was a noticeable discomfort.

[Experiment B]
(Examples B1 to B25 and Comparative Examples B1 to B12)
The window member was manufactured and evaluated in the same manner as in Experimental Example A, except that R1, x, y, and R2 in FIG. 1B in the surface bent portion 4 had the values shown in Table 2. .

The resin member of the present invention is useful as a vehicle member, an optical member, a building member, or the like.
Examples of the vehicle member include vehicle window members such as a roof window, a front window, a triangular window, a rear window, a rear quarter window, and a back window.

1: Resin base material 2: Resin layer 3: Coating layer 4: Surface bent portion 40: Stepped portion

Claims (8)

A resin member in which a coating layer is formed on a resin base material having a surface bending portion where the surface bends at a curvature radius R1 of 3 mm or less,
In the vertical cross section of the resin member in which the coating layer is disposed above the resin base material,
The resin base material has a stepped portion formed on the surface bent portion, the surface rising or sinking,
The step x of the stepped portion is 0.02 to 2.5 mm;
The drop y (mm) from the bending start point of the surface bent portion to the stepped portion is a curvature radius R1 (mm) of the surface bent portion and the following relational expression:
R1 × 0.2 ≦ y ≦ R1 × 1.8
Resin member that satisfies The stepped portion is a raised stepped portion formed by raising the surface,
2. The resin member according to claim 1, wherein the raised stepped portion has a downwardly convex arc shape, a linear shape, or an upwardly convex arc shape in the vertical cross section. The stepped portion is a settling type stepped portion formed by sinking the surface,
2. The resin member according to claim 1, wherein the subsidence-type stepped portion has a downwardly convex arc shape, a linear shape, or an upwardly convex arc shape in the vertical cross section.   The resin member according to claim 1, wherein the coating layer has a thickness of 1 to 100 μm.   The method for producing a resin member according to any one of claims 1 to 4, wherein the coating layer is formed from a coating liquid having a viscosity of 1000 mPas or less and a surface tension of 80 mN / m or less. The resin member is a vehicle window member;
The resin substrate is a transparent resin substrate;
The resin member according to claim 1, wherein the coating layer is a transparent coating layer. It is a manufacturing method of the resin member in any one of Claims 1-6,
A method for producing a resin member, wherein the coating layer is formed after the resin substrate is formed.   The method for producing a resin member according to claim 7, wherein the coating layer is formed from a coating liquid having a viscosity of 1000 mPas or less and a surface tension of 80 mN / m or less.

Images