JP2019155799A - Laminate and method for manufacturing the same - Google Patents

Abstract

To provide a laminate capable of simultaneously enhancing sharpness and wear resistance of a printing part when printing means by use of laser irradiation is employed, and a method for manufacturing the same, and to provide a laminate that excels, in addition to the above characteristics, in welding strength between a laser transmissive member and a laser printing member, and a method for manufacturing the same.SOLUTION: A method for manufacturing a laminate includes the following steps which are carried out in this order: overlapping a laser transmissive member and a laser printing member that absorbs a laser to develop a color; and allowing the laser transmissive member to be passed through, and irradiating the laser printing member with the laser to print on the surface of the laser printing member.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a laminate and a method for producing the same.

  Conventionally, as a means for joining synthetic resin materials, a laser welding method for joining a synthetic resin material by irradiating a laser is known. For example, a method is disclosed in which laser welding is performed with a laser-transmitting sheet interposed between a laser-transmitting resin member and a laser-absorbing resin member (see, for example, Patent Document 1).

  On the other hand, a printing method is known in which characters and symbols are drawn and written on the printing surface of the package by laser irradiation. For example, prepare a base material (surface protective layer) made of a synthetic resin layer, a metal layer or metal oxide layer, or a resin molded body with a sealant fused, and the surface of the metal layer or metal oxide layer over the surface protective layer A printing method for performing desired printing by irradiating a laser beam is disclosed (for example, see Patent Document 2). In such a laser printing method, the sharpness of the printing may be insufficient, and in order to improve this, desired printing is performed by directly irradiating the surface of the resin molded body with a laser without providing a surface protective layer. A printing method has also been studied (for example, see Patent Document 3).

JP 2007-111961 A Japanese Patent Laid-Open No. 2007-217048 Japanese Patent Laid-Open No. 2006-124562

  However, with the conventional printing method, it has been difficult to achieve both the clearness of the printed portion and the wear resistance. Specifically, in the technique disclosed in Patent Document 2, the volume of the print portion formed by laser irradiation increases, and the print portion is slightly raised. And since the surface protective layer is being fixed in the state closely_contact | adhered to the resin molding, a surface protection layer cannot follow the volume change of the printing part formed in the resin molding. For this reason, there is a problem that the printing interface is blurred and the clearness of the printing portion is impaired. Further, the technique disclosed in Patent Document 3 has a problem in that the printed part is easily damaged by an external impact because the surface protective layer is not provided.

  Thus, some aspects of the present invention provide a laminate that can simultaneously improve the sharpness and wear resistance of a printed portion when a printing means using laser irradiation is used, and a method for manufacturing the same. Furthermore, some embodiments according to the present invention provide a laminate having excellent fusion strength between a laser transmitting member and a laser printing member in addition to the above characteristics, and a method for producing the same.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as any of the following aspects.

One aspect of the method for producing a laminate according to the present invention is as follows.
A step of superimposing a laser transmitting member and a laser printing member that absorbs the laser and develops color;
Irradiating the laser printing member with a laser transmitting through the laser transmitting member and printing on the surface of the laser printing member;
Are performed in this order.

In one aspect of the method for producing the laminate,
After the overlaying process and before the printing process,
Further, the method may include a step of causing the laser transmitting member to pass through and irradiating the laser printing member with a laser so as to fuse a part of the laser transmitting member and a part of the laser printing member.

In any aspect of the method for producing the laminate,
In the fusing step, a fusing region between a part of the laser transmitting member and a part of the laser printing member may be a region other than the printing portion of the laser printing member.

In any aspect of the method for producing the laminate,
The laser printing member may comprise a resin composition containing a laser color former in an amount of more than 0.01 parts by weight and less than 1 part by weight with respect to 100 parts by weight of the resin.

In any aspect of the method for producing the laminate,
The laser color former may be carbon black.

One aspect of the laminate according to the present invention is:
A laser transmitting member;
A laser printing member that absorbs the laser and develops color;
In a laminate comprising
Having a printing portion on the surface of the laser printing member;
A part of the laser transmitting member and a part of the laser printing member are fixed, and has a flexible region with respect to the thickness direction of the laminate between the laser transmitting member and the laser printing member,
The printing unit is located in the flexible region.

In one aspect of the laminate,
A part of the laser transmitting member and a part of the laser printing member may be fused and fixed.

In one aspect of the laminate,
A part of the laser transmitting member and a part of the laser printing member may be fixed by laser welding.

In any embodiment of the laminate,
The laser printing member may comprise a resin composition containing a laser color former in an amount of more than 0.01 parts by weight and less than 1 part by weight with respect to 100 parts by weight of the resin.

In any embodiment of the laminate,
The laser color former may be carbon black.

According to one aspect of the method for manufacturing a laminate according to the present invention, it is possible to manufacture a laminate that can simultaneously improve the sharpness and wear resistance of a printed portion formed by laser irradiation. Furthermore, according to one aspect of the method for producing a laminate according to the present invention, it is possible to produce a laminate excellent in the fusion strength between the laser transmitting member and the laser printing member in addition to the above characteristics.

It is sectional drawing which shows typically the superimposition process of this embodiment. It is sectional drawing which shows typically the printing process of this embodiment. It is sectional drawing which shows typically the melt | fusion process of this embodiment. It is a top view which shows typically the laminated body shown in FIG. It is sectional drawing which shows typically the structure of the laminated body which concerns on this embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail. In addition, this invention is not limited to the following embodiment, Various modifications implemented in the range which does not change the summary of this invention are also included.

  In the present specification, a numerical range described using “to” means that numerical values described before and after “to” are included as a lower limit value and an upper limit value.

  In the present invention, “printing” refers to drawing by laser irradiation, and what is printed includes, but is not limited to, letters, numbers, symbols, designs, various information, barcodes, and the like.

  In the present invention, “fusion” means that at least a part of two members is locally heated and melted to be welded.

1. Method for Producing Laminate The method for producing a laminate according to this embodiment is a step of superimposing a laser transmitting member and a laser printing member that absorbs laser and develops color (also referred to as “superposition step” in this specification). And a step of transmitting the laser transmitting member and irradiating the laser printing member with a laser to print on the surface of the laser printing member (also referred to as a “printing step” in the present specification). Perform in this order. In addition, in the method for manufacturing a laminate according to the present embodiment, after the superimposing step and before the printing step, the laser transmitting member is transmitted through the laser transmitting member to irradiate the laser printing member with the laser transmitting member. A step of fusing part of the laser printing member and part of the laser printing member (also referred to as “fusing step” in the present specification) may be further included. Hereinafter, each process of the manufacturing method of the laminated body which concerns on this embodiment is demonstrated in detail, referring drawings.

1.1. Superposition Process FIG. 1 is a cross-sectional view schematically showing the superposition process of the present embodiment. First, as shown in FIG. 1, a laser transmitting member 10 and a laser printing member 12 that develops color by absorbing a laser are overlapped. At this stage, the laser transmitting member 10 and the laser printing member 12 are detachable. In this specification, “detachable” means that the laser transmitting member 10 and the laser printing member 12 can be separated from each other without being fixed via an adhesive layer or fixed by fusion. It means being in a state. When the laser transmitting member 10 and the laser printing member 12 are in a detachable state, a flexible region in the thickness direction of the laminate is present between them, so-called “play” can be ensured.

In the example of FIG. 1, the laser printing member 12 is formed independently, but may be formed integrally with another member such as a laser absorbing member. When these members are integrally molded, for example, the molding can be performed by a general molding method such as an injection molding method or an extrusion molding method. Further, when the laser printing member 12 and other members such as a laser absorbing member are formed separately, these members may be fixed with an adhesive or the like in a non-detachable state. Even when the laser printing member 12 and other members are fixed, the laser transmitting member 10 and the laser printing member 12 need to be overlapped with each other so that they can be detached. There is.

  Each member can be molded by various procedures that are usually performed. For example, it can be molded by an injection molding machine using resin composition pellets. In addition, for example, any generally performed molding method such as extrusion molding, compression molding, foam molding, blow molding, vacuum molding, injection blow molding, rotational molding, calendar molding, solution casting, etc. can be adopted. Various members having various shapes can be obtained by such molding.

  The material of the laser transmitting member 10 is not particularly limited as long as it can transmit the laser to be used. For example, non-liquid crystalline polyester such as non-liquid crystalline semi-aromatic polyester, non-liquid crystalline wholly aromatic polyester, poly (meth) acrylic ester, polycarbonate, aliphatic polyamide, aliphatic-aromatic polyamide, wholly aromatic polyamide, etc. Polyamide, polyoxymethylene, polyimide, polybenzimidazole, polyketone, polyetheretherketone, polyetherketone, polyethersulfone, polyphenyleneoxide, phenoxy resin, polyphenylene sulfide, liquid crystalline resin, polypropylene, polyethylene, polystyrene, and other olefins Polymer, ethylene / propylene copolymer, ethylene / 1-butene copolymer, ethylene / propylene / non-conjugated diene copolymer, ethylene / ethyl acrylate copolymer, ethylene / methacrylic acid Glycidyl acid copolymers, ethylene / vinyl acetate / glycidyl methacrylate copolymers and ethylene / propylene-g-maleic anhydride copolymers, olefin copolymers such as ABS, polyester polyether elastomers, polyester polyester elastomers, etc. Examples thereof include one or a mixture of two or more selected from elastomers (“/” represents copolymerization; the same applies hereinafter).

  The material of the laser printing member 12 is preferably a resin containing a laser color former. Laser color formers include metals such as aluminum, nickel, gold, silver, copper, iron, and stainless steel (SUS); metal oxides such as titanium oxide, magnesium oxide, zinc oxide, aluminum oxide, and silicon oxide; carbon black and the like Is mentioned. Among these, carbon black is preferable. When carbon black is used, color development is good and the printed part tends to be clear. Examples of the resin include polyester resins such as polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), and polycarbonate (PC); polymethyl methacrylate (PMMA) Acrylic resins such as); and other materials such as polystyrene (PS) that can obtain a film with high transparency and low absorptance. Examples of the method for producing the laser printing member 12 include a method in which a laser color former and a resin are melt-kneaded to form a resin composition pellet and molded by an injection molding machine.

  The content ratio of the laser color former in the resin composition pellet is preferably more than 0.01 parts by weight and less than 1 part by weight, more preferably 0.02 parts by weight or more and 0.9 parts by weight with respect to 100 parts by weight of the resin. Part or less, particularly preferably 0.05 parts by mass or more and 0.5 parts by mass or less. When the content ratio of the laser color former is in the above range, the laser printing member 12 is not easily damaged by laser irradiation, and the printing density is moderate and the printed portion tends to be clear.

When using a laser absorbing member, the material of the laser absorbing member is not particularly limited as long as it absorbs the laser to be used. For example, among the resins described in the laser transmitting member 10, those that are more laser-absorbing than the laser-transmitting member 10, materials that are made laser-impermeable (or laser-absorbing) by adding various additives, or The same material as the laser printing member 12 can be used. Various additives are general additives used for laser fusion, and are not particularly limited.

  When the laser printing member 12 and the laser absorbing member are separately molded, the laser printing member 12 may be interposed at least in the printing portion. When the laser printing member 12 and the laser absorbing member are separately molded, the laser printing member 12 is preferably a material having an absorption rate of 5% or less with respect to a laser used for laser printing. As a result, even when laser printing is performed by high-energy laser irradiation, the laser printing member 12 can be prevented from being burnt, and the degree of freedom of laser printing can be improved.

  The absorptance (%) can be calculated as 100% −transmittance (%) − reflectance (%) at the wavelength of the laser used for printing. The measuring method of the transmittance and the reflectance is not particularly limited. A commercially available device can also be used as the measuring device. In the case where the absorption rate varies significantly depending on the measuring device, in the present invention, a numerical value calculated using a UV-VIS-NIR spectrophotometer (UV3100) manufactured by Shimadzu Corporation is used as the absorption rate. And

  In the superimposing step of the present embodiment, the materials of the laser transmitting member 10, the laser printing member 12, and the laser absorbing member include an antioxidant, a heat stabilizer, a weathering agent, a release agent, a lubricant, a pigment, at an arbitrary ratio. Dyes, crystal nucleating agents, plasticizers, antistatic agents, flame retardants, other polymers, and the like can be added.

  Each member of the present invention can be obtained by blending necessary materials in a blending amount in accordance with the purpose and forming by the above forming method. The blending amount and molding conditions can be appropriately selected by those skilled in the art.

  The thickness of the laser transmitting member 10 and the laser printing member 12 is preferably 0.1 mm to 10 mm, and more preferably 0.5 mm to 5 mm, particularly from the viewpoint of laser printing strength.

1.2. Fusion / Adhesion Process Other than the printing unit, the members obtained as described above are fixed by applying appropriate fixing means (for example, clamping, air pressure, etc., by applying pressure (weight) in the thickness direction of each member) The laminated body may be formed by fixing by means of an adhesive at this point, fusion by a hot plate, fusion by vibration / ultrasonic waves, welding by laser fusion, or the like. Among these fixing means, a means for welding by laser fusion to a portion other than the printing portion is preferable in order to prevent displacement of each member. Specifically, the following can be performed.

  FIG. 2 is a cross-sectional view schematically showing the fusion process of the present embodiment. As shown in FIG. 2, after the superimposing process and before the printing process, the laser transmitting member 10 is transmitted to irradiate the laser printing member 12 with the laser, and a part of the laser transmitting member 10 and one of the laser printing members 12 are irradiated. The part can be fused. Thereby, since the laser transmission member 10 and the laser printing member 12 are fixed in the fusion | melting area | region 14, position shift can be prevented. The arrow in FIG. 2 means that the laser is irradiated in the direction of the arrow.

As shown in FIG. 2, the fusion region 14 between the laser transmitting member 10 and the laser printing member 12 is preferably a region other than the printing portion 16 of the laser printing member 12. For example, in the plan view of the laminate, it is preferable to form the fusion region 14 in an area other than the printing unit 16 and in at least a part of the inner area from each side of the laminate. As a result, a flexible region in the thickness direction of the laminate is present in the printing portion 16 between the laser transmitting member 10 and the laser printing member 12, and so-called "play" can be ensured. Note that the fusion region 14 can take various shapes such as a circle, a cylinder, and a hemisphere depending on the application.

  As a laser source that can be used in the fusion process of the present embodiment, a YAG laser (1064 nm), a YVO4 laser (1064 nm), a semiconductor laser (for example, a laser having a wavelength in the near infrared region such as 808 nm, 940 nm, 980 nm) Is mentioned. Conditions for laser irradiation in the fusing process can be easily set by a few preliminary experiments by those skilled in the art. Specifically, the fusing process is performed while appropriately adjusting the laser output, spot diameter, scanning speed, etc. Can do.

1.3. Printing Process FIG. 3 is a cross-sectional view schematically showing the printing process of this embodiment. FIG. 4 is a plan view of FIG. A cross-sectional view along line AA in FIG. 4 corresponds to FIG. In addition, the arrow of FIG. 3 means that a laser is irradiated in the direction of the arrow.

  Next, as shown in FIG. 3, the laser is irradiated from the laser transmitting member 10 side, the laser is transmitted through the laser transmitting member 10, and at least a part of the laser is absorbed by the laser printing member 12. Printing is performed. In the example shown in FIGS. 3 and 4, the letter “E” is printed by laser irradiation. The printing portion 16 formed by laser irradiation increases in volume and slightly rises. However, since the printing portion 16 has a flexible region in the thickness direction of the laminate, so-called “play” can be ensured. Thereby, even if the printing part 16 rises slightly, it can follow without being restrained by the laser transmitting member 10, so that the printing part 16 appears clearly. On the other hand, since the printing unit 16 is protected by the laser transmitting member 10, it is resistant to external impacts.

  As a laser source that can be used in the printing process of the present embodiment, a YAG laser (1064 nm), a YVO4 laser (1064 nm), a semiconductor laser (for example, a laser having a wavelength in the near infrared region such as 808 nm, 940 nm, 980 nm) or the like. Can be mentioned. The conditions of laser irradiation in the printing process can be easily set by a few preliminary experiments by those skilled in the art. Specifically, the printing process can be performed while appropriately adjusting the laser output, spot diameter, scanning speed, and the like. .

  As described above, the laminated body 100 having the printing unit 16 protected by the laser transmitting member 10 can be manufactured.

2. Laminated body This invention includes the laminated body manufactured by the said manufacturing method. FIG. 5 is a cross-sectional view schematically showing the configuration of the laminate according to this embodiment. As shown in FIG. 5, a laminate according to an embodiment of the present invention includes a laser printing member 12 in a laminate 100 including a laser transmitting member 10 and a laser printing member 12 that absorbs a laser and develops color. The printing part 16 is provided on the surface of the laser beam, a part of the laser transmitting member 10 and a part of the laser printing member 12 are fixed, and the thickness direction of the laminate 100 is between the laser transmitting member 10 and the laser printing member 12. The printing unit 16 is located in the flexible region 18.

  As a means for fixing a part of the laser transmitting member 10 and the laser printing member 12, as shown in FIG. 5, a part of the laser transmitting member 10 and a part of the laser printing member 12 are fused. A means for fixing by the formed fusion region 14 is preferable.

As described above, the printing portion 16 formed by laser irradiation increases in volume and slightly rises. However, since the printing portion 16 includes the flexible region 18 in the thickness direction of the laminate 100, so-called “ "Play" can be secured. Thereby, even if the printing part 16 rises slightly, it can follow without being restrained by the laser transmitting member 10, so that the printing part 16 appears clearly. On the other hand, since the printing unit 16 is protected by the laser transmitting member 10, it is resistant to external impacts.

  The laminate according to the present embodiment is useful for, for example, electrical / electronic applications, automobile applications, general sundries applications, building members, and the like, and in particular, automotive parts such as module parts in an engine room, intake manifolds, underhood parts, It can be used for cockpit module parts used for radiator parts, instrument panels, and the like. As other applications, it is useful for electronic parts such as personal computers, liquid crystal projectors, mobile devices, and mobile phones.

3. Examples Hereinafter, the present invention will be described by way of examples. However, the present invention is not limited to these examples. In the examples, “parts” and “%” are based on mass unless otherwise specified.

3.1. Example 1
3.1.1. Laminate creation <superposition process>
Under conditions of a cylinder temperature of 230 ° C and a mold temperature of 60 ° C, an injection molding machine (manufactured by JSW, 110H) was used to injection-mold PMMA resin (manufactured by Mitsubishi Chemical Co., Ltd., trade name “Acrypet MF”). A laser transmitting member having a size of 90 mm × width 50 mm × thickness 3 mm was prepared.
Next, 100 parts by mass of PMMA resin (trade name “Acrypet MF” manufactured by Mitsubishi Chemical Corporation) and carbon black (trade name “# 45” manufactured by Mitsubishi Chemical Corporation, average particle diameter 24 nm) 0.3 as a laser color former The mass part was melt-kneaded with a twin-screw extruder and then pelletized. The prepared pellets were injection-molded using an injection molding machine (manufactured by JSW, 110H) under conditions of a cylinder temperature of 230 ° C. and a mold temperature of 60 ° C., and a laser printing member having a length of 90 mm × width of 50 mm × thickness of 3 mm was obtained. Created.
The obtained laser transmitting member and the laser printing member were superposed, sandwiched from the outside with a quartz plate, and temporarily fixed with a load of 0.6 MPa to obtain a laminate.

<Fusion process and printing process>
The laminate obtained above is scanned and irradiated with a laser from the laser transmitting member side and an inner circumference of 5 mm from the end portion onto the frame with a welding line width of 2 mm, and the laser transmitting member and the laser printing member are partially Fused. As the laser, a YVO4 laser (wavelength: 1064 nm, spot diameter: 60 μm, maximum output: 24 W) manufactured by German Roffin-Sinar was used.
After that, using the same laser, the surface of the laser printing member was placed at the focal position, the spot diameter was 60 μm, the output was 4 W, the scanning speed was 600 mm / sec, and a 14 mm × 14 mm two-dimensional bar code recording company information on Nippon Coloring. Is printed.

3.1.2. Evaluation method <Vividness of printing>
The laminate obtained above was read from the laser transmitting member side with a two-dimensional barcode reader, and the vividness of printing was evaluated based on whether or not the reading was possible. As a reader, a two-dimensional barcode reader SR1000 manufactured by Keyence Corporation, which can be evaluated based on ISO / IEC TR29158, was used.
(Evaluation criteria)
-If it was readable and the printed image was found to be very clear visually, it was judged as very good and indicated as "「 ".
-When it was readable and the print was recognized visually, it was judged as good and indicated as "O".
・ When reading was impossible, the print was unclear and judged as defective, and indicated as “x”.

<Abrasion resistance>
The printed part of the laminate obtained above was rubbed with a nail, and the rubbing (damage) state of the printed part of the laminated body after rubbing was visually observed to evaluate the friction resistance. The evaluation criteria are as follows. The evaluation results are also shown in Table 1.
(Evaluation criteria)
・ If no fading was observed in the printed part, it was judged as good and indicated as “◯”.
・ When fading was observed in the printed part, it was judged as defective and indicated as “×”.

<Fusion strength>
The laminate obtained above was evaluated by measuring the shear strength of the laser transmitting member and the laser printing member in accordance with JIS K6850 using model number “5565” manufactured by Instron. The evaluation criteria are as follows. The evaluation results are also shown in Table 1.
(Evaluation criteria)
When the shear strength was 1 kgf or more, it was judged that the fusion strength was good, and indicated as “◯”.
When the shear strength was less than 1 kgf, the fusion strength was judged to be poor and indicated as “x”.

3.2. Examples 2-7
A laser printing member was prepared in the same manner as in Example 1 except that the laser intensity was changed in a timely manner and the resin composition was changed to the composition shown in Table 1, and the sharpness, friction resistance, and fusion strength of printing were adjusted. evaluated. The evaluation results are also shown in Table 1.

3.3. Comparative Example 1
The laser transmitting member prepared in the same manner as in Example 1 was placed in a mold, and the pellet for a laser printing member prepared in Example 1 using the same apparatus (manufactured by JSW, 110H) as in Example 1, By performing insert molding under the conditions of a cylinder temperature of 230 ° C. and a mold temperature of 60 ° C., a laminate having a length of 90 mm × width of 50 mm × thickness of 6 mm in which a laser transmitting member and a laser printing member were integrated was obtained. Thereafter, in the same manner as in Example 1, the clearness, friction resistance and fusion strength of the printing were evaluated. The evaluation results are also shown in Table 1.

3.4. Comparative Example 2
The surface of the laser printing member obtained in Example 1 was placed at the focal position, the spot diameter was 60 μm, the output was 4 W, the scanning speed was 600 mm / sec, and the company information of Nippon Coloring was recorded by direct laser irradiation. 14 mm × 14 mm A two-dimensional barcode was printed. Thereafter, in the same manner as in Example 1, the clearness and friction resistance of the printing were evaluated. The evaluation results are also shown in Table 1.

3.5. Evaluation Results Table 1 below shows the composition, construction method, and evaluation results of the resin composition pellets used to prepare the laser printing member in each of the examples and comparative examples.

Abbreviations of the resin types in Table 1 are as follows.
・ PMMA: Mitsubishi Chemical Corporation, trade name “Acrypet MF”, polymethyl methacrylate PC: Mitsubishi Engineering Plastics, trade name “7022PJ”, Polycarbonate PS: PS Japan, trade name “HF77” ,polystyrene

  As is apparent from Table 1 above, according to the method for manufacturing a laminate according to the present invention of Examples 1 to 7, when the printing means by laser irradiation is used, the sharpness and wear resistance of the printed portion are simultaneously obtained. It turned out that the laminated body which can be improved is obtained. Moreover, according to the manufacturing method of the laminated body which concerns on this invention of Examples 1-7, it is excellent also in melt | fusion strength by fusing the inner periphery of 5 mm from the edge part of a laminated body to frame shape. I understood.

  On the other hand, in the method for manufacturing the laminate of Comparative Example 1, since the laser transmissive member and the laser printing member are integrated by insert two-color molding, the flexible structure is provided between the laser transmissive member and the laser printing member. It was found that the print area was not clear and the print area was unclear.

  In the method for manufacturing the laminate of Comparative Example 2, the printed part was clear, but it was found that the printed part was not protected by the laser transmitting member, so that the friction resistance was poor.

  The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the present invention includes substantially the same configuration (for example, a configuration having the same function, method, and result, or a configuration having the same purpose and effect) as the configuration described in the embodiment. In addition, the invention includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. In addition, the present invention includes a configuration that achieves the same effect as the configuration described in the embodiment or a configuration that can achieve the same object. In addition, the invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

DESCRIPTION OF SYMBOLS 10 ... Laser transmission member, 12 ... Laser printing member, 14 ... Fusion area | region, 16 ... Printing part, 18 ... Flexible area | region, 100 ... Laminate

Claims (10)

A step of superimposing a laser transmitting member and a laser printing member that absorbs the laser and develops color;
Irradiating the laser printing member with a laser transmitting through the laser transmitting member and printing on the surface of the laser printing member;
The manufacturing method of a laminated body which is performed in this order. After the overlaying process and before the printing process,
2. The method according to claim 1, further comprising a step of causing the laser transmitting member to pass through and irradiating the laser printing member with a laser to fuse a part of the laser transmitting member and a part of the laser printing member. The manufacturing method of the laminated body.   3. The laminate according to claim 2, wherein in the fusion process, a fusion region between a part of the laser transmitting member and a part of the laser printing member is a region other than a printing portion of the laser printing member. Production method.   The said laser printing member consists of a resin composition which contains more than 0.01 mass parts and less than 1 mass part of laser color formers with respect to 100 mass parts of resin. A manufacturing method of a layered product.   The manufacturing method of the laminated body of Claim 4 whose said laser color former is carbon black. A laser transmitting member;
A laser printing member that absorbs the laser and develops color;
In a laminate comprising
Having a printing portion on the surface of the laser printing member;
A part of the laser transmitting member and a part of the laser printing member are fixed, and has a flexible region with respect to the thickness direction of the laminate between the laser transmitting member and the laser printing member,
A laminate in which the printing unit is located in the flexible region.   The laminate according to claim 6, wherein a part of the laser transmitting member and a part of the laser printing member are fused and fixed.   The laminate according to claim 6, wherein a part of the laser transmitting member and a part of the laser printing member are fixed by laser fusion.   The laminate according to claim 6 or 8, wherein the laser printing member comprises a resin composition containing a laser color former in an amount of more than 0.01 parts by mass and less than 1 part by mass with respect to 100 parts by mass of the resin.   The laminate according to claim 9, wherein the laser color former is carbon black.

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