JP6123358B2 - Thermal insulating decorative sheet with wood grain pattern - Google Patents

Description

  The present invention is mainly used for the outer layer of exterior doors such as houses and stores, and is used outdoors such as window frames, terraces, garages, etc., and has a wood pattern with a high weather resistance and a light shielding effect. The present invention relates to a thermal decorative sheet.

  Conventionally, olefin-based decorative sheets with weather resistance have been used for the surface of entrance doors, etc., but weather resistance has been evaluated by actual outdoor exposure and accelerated weather resistance tests, and in the ultraviolet region of sunlight. On the other hand, although it was the design which gave the prescription, it was not considered about the absorption of the heat | fever of an infrared region.

  When actually used, the weather resistance was satisfactory, but heat absorption occurred due to the absorption of heat in the infrared region of sunlight, resulting in transmission from the base film to the entrance door, etc. As a result, the chronic problem in which thermal expansion occurs and warpage occurs due to a temperature difference between the front and back sides remains unresolved.

  In particular, in printing with a wood grain pattern, black printing was required in the conduit part of the wood to give depth as a design, but black pigments such as carbon black have a reflectance in the near-infrared light region (781 nm to 2500 nm). Therefore, a heat storage effect was generated by absorption of heat in the infrared region. Although it is possible to express black with a pigment other than black, in that case, the design is inferior, and since the degree of deterioration of the weather resistance of the pigment with time is different, a color change occurs.

JP2010-089441

  The present invention has been made in order to solve such problems, that is, the problem is that it has excellent physical properties such as weather resistance, abrasion resistance, water resistance and the like, and has a light shielding effect. In addition, an object of the present invention is to provide a heat-insulating decorative sheet having a wood grain pattern that is excellent in design properties such as the depth of a pattern.

The present invention solves this problem, that is, the invention according to claim 1 is a heat-insulating decorative sheet having a wood grain pattern in which a printing layer and an overlay film layer are provided at least in this order on the surface side of the base film layer. The printed layer has one or more solid printed layers and a plurality of wood grain patterned layers in this order from the base film layer side, and the pigment used in the printed layer is isoindolinone, disazo, polyazo, diketo It is selected from pyrrolopyrrole, quinacridone, phthalocyanine, and titanium oxide, and the outermost wood grain pattern layer of the wood grain pattern layer is black by mixing isoindolinone, diketopyrrolopyrrole, and phthalocyanine pigment without using carbon black pigment. Is a heat-shielding decorative sheet having a wood grain pattern, which is characterized by reproducing the above.

  The invention according to claim 2 comprises a coating layer provided on the surface side of the overlay film layer, and the overlay film layer comprises a random polypropylene resin added with an ultraviolet absorber and a hindered amine light stabilizer. 2. The heat-insulating decorative sheet having a wood grain pattern according to claim 1, wherein the coating layer comprises an acrylic polyol and hexamethylene diisocyanate added with an ultraviolet absorber and a hindered amine light stabilizer.

  According to the first aspect of the present invention, the printed layer is a solid printed layer and a wood grain pattern layer, specific pigments are used for these layers, and black pigments are not used. Thus, it is possible to obtain a light shielding effect, prevent warping from occurring, and obtain a heat-insulating decorative sheet having a wood grain pattern that does not change in color over time.

  Further, according to the invention of claim 2, it is possible to further improve and maintain the weather resistance over time and the light shielding effect by specifying the resin of the overlay film layer and further providing a coating layer of the specific resin on the surface side thereof. did.

It is explanatory drawing which shows the shape of the cross section of one Example of the heat insulation decorative sheet which has the grain pattern of this invention.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cross-sectional shape of one embodiment of the heat-shielding decorative sheet having the wood grain pattern of the present invention. The base film layer 1 and the print layer 2 are composed of a solid print layer 21, a wood grain pattern layer 22, and an overlay film layer 3, and a coating layer 4 is appropriately provided.

  As the base film layer 1 in the present invention, a polypropylene resin or a polyethylene resin can be used as a substitute for the vinyl chloride resin, and a random polypropylene resin that is easy to handle is particularly suitable. An ultraviolet absorber and a hindered amine light stabilizer are preferably added to the base film layer 1 for improving weather resistance. Further, a phenolic antioxidant or the like may be added as appropriate.

  The printing layer 2 in the present invention is provided with ink using a pigment, which will be described later, by gravure printing or the like, and includes a solid printing layer 21 and a wood grain pattern layer 22. The solid print layer 21 and the wood grain pattern layer 22 may be appropriately composed of a plurality of layers. The ink only needs to be printable on the base film layer 1. Specifically, if the base film layer 1 is a random polypropylene resin, a mixture of urethane resin and vinyl chloride = vinyl acetate copolymer resin is suitable. Used for.

  As the pigment used for the printing layer 2 in the present invention, a pigment selected from isoindolinone, disazo, polyazo, diketopyrrolopyrrole, quinacridone, phthalocyanine, and titanium oxide is used. When a solid print layer 21 is provided and a wood grain pattern 22 is used to represent a wood conduit, black is not used but black is reproduced by mixing isoindolinone, diketopyrrolopyrrole, and phthalocyanine pigment. . By combining with the solid print layer 21, it is possible to obtain a deep design and suppress a color change with time and increase the reflectance in the infrared light region to a certain level or more.

  As the over film layer 3 in the present invention, when the coating layer 4 is further provided on the surface, a resin may be selected in consideration of interlayer adhesion with the base film layer 1 and the printing layer 2. Specifically, The same resin as the base film layer 1 is preferable, and it is preferable to add an ultraviolet absorber and a hindered amine light stabilizer. On the other hand, when the overlay film layer 3 is a surface layer, it is preferable to use a polymethylmethacrylic resin, and it is preferable to add an ultraviolet absorber and a hindered phenol-based antioxidant, considering interlayer adhesion. It is preferable to provide an adhesive layer (not shown) made of at least one of acrylic resin, polyester resin, and vinyl chloride = vinyl acetate copolymer resin between the printing layer 2 and the printed layer 2.

  As base film layer 1, 100 parts by weight of a random polypropylene resin, 1 part by weight of an ultraviolet absorber, 1 part by weight of a hindered amine light stabilizer and 3 parts by weight of a hindered phenol antioxidant are added to a thickness of 70 μm. What was formed into a film was used.

  As a solid printing layer 21 of the printing layer 2 on the surface of the base film layer 1, 100 parts by weight of a mixture of urethane resin and vinyl chloride = vinyl acetate copolymer resin in a ratio of 7: 3 is used as a curing agent, hexamethylene diisocyanate. 3 parts by weight of a mixture of 1: 8 and isophorone diisocyanate was added, and 5.3 parts by weight of isoindolinone, 2.4 parts by weight of polyazo, and 1.7 parts by weight of phthalocyanine were added as pigments to form ink. Printed on.

  As a first layer of the grain pattern layer 22 on the surface of the solid printing of the printing layer 2, 100 parts by weight of a mixture of urethane resin and vinyl chloride = vinyl acetate copolymer resin in a ratio of 7: 3 is used as a curing agent. 3 parts by weight of a mixture of methylene diisocyanate and isophorone diisocyanate in a ratio of 2: 8 was added, and 6.0 parts by weight of polyazo and 3.1 parts by weight of phthalocyanine were added as pigments. .

  As a second layer of the wood grain pattern layer 22 of the printing layer 2, 100 parts by weight of a urethane resin and vinyl chloride = vinyl acetate copolymer resin mixed in a ratio of 7: 3, hexamethylene diisocyanate and isophorone diisocyanate as curing agents are used. 3 parts by weight of a mixture of 2: 8 was added, 2.4 parts by weight of isoindolinone, 5.2 parts by weight of polyazo, and 2.7 parts by weight of phthalocyanine were added as pigments to obtain an ink. Printed the part.

  As a third layer of the wood grain pattern layer 22 of the printing layer 2, 100 parts by weight of a mixture of urethane resin and vinyl chloride = vinyl acetate copolymer resin in a ratio of 7: 3, hexamethylene diisocyanate and isophorone diisocyanate as curing agents are used. 3 parts by weight of a 2: 8 mixture was added, and 3.2 parts by weight of isoindolinone, 4.9 parts by weight of polyazo, and 3.0 parts by weight of phthalocyanine were added as pigments to obtain a mixed color black ink. , Printed the wood grain conduit part.

  As an overlay film layer 3, 0.5 parts by weight of an ultraviolet absorber and 0.3 parts by weight of a hindered amine light stabilizer were added to 100 parts by weight of a random polypropylene resin as the overlay film layer 3 on the surface of the base film 1 provided with the printing layer 2. The product was provided by melt extrusion so that the thickness after drying was 70 μm.

  The surface of the overlay film layer 3 is prepared by adding 10 parts by weight of hexamethylene diisocyanate, 5 parts by weight of an ultraviolet absorber, and 5 parts by weight of a hindered amine light stabilizer to 100 parts by weight of an acrylic polyol so as to have a coating thickness of 9 μm. The heat-insulating decorative sheet having the wood grain pattern of the present invention was prepared.

<Comparative Example 1>
The base film layer was formed by adding the pigment added to the solid print layer 21 of Example 1, the solid print layer 21 was not provided, and the pigment in the third layer of the grain pattern layer was 5 parts by weight of carbon black. Replaced. Other materials and configurations were the same as in Example 1, and a decorative sheet having the same grain pattern as in Example 1 was prepared.

<Performance comparison 1>
The reflectivity for light having a wavelength of 250 nm to 2500 nm was measured on the decorative sheets of Example 1 and Comparative Example 1 using a U-4100 type spectrophotometer manufactured by Hitachi High-Technologies Corporation. The results are shown in Table 1.

<Performance comparison 2>
For a non-coated steel sheet with a length of 21 cm and a width of 29.7 cm and a thickness of 0.5 mm, the decorative sheet is irradiated from the place where the halogen bulb is separated from the top by 15 cm from the adhesive sheet. Irradiation was continued for 120 minutes so as to be a surface, the temperature was recorded on the front and back of the steel sheet every minute, and the maximum value was measured. The results are shown in Table 2.

  From Table 1, it was confirmed that Example 1 has a higher reflectance in the infrared light region (781 nm to 2500 nm) than Comparative Example 1. Further, from Table 2, it was confirmed that the heat shielding property was excellent.

  The heat-insulating decorative sheet having a wood grain pattern of the present invention can be used not only for the surface layer of exterior doors of houses, stores, ships, etc., but also outdoors such as window frames, terraces, and garages.

DESCRIPTION OF SYMBOLS 1 ... Base film layer 2 ... Printing layer 21 ... Solid printing layer 22 ... Wood grain pattern layer 3 ... Overlay film layer 4 ... Coating layer

Claims (2)

In the heat-shielding decorative sheet having a wood grain pattern in which at least a printing layer and an overlay film layer are provided in this order on the surface side of the base film layer,
The printed layer has one or more solid printed layers and a plurality of wood grain patterned layers in this order from the base film layer side, and pigments used in the printed layer are isoindolinone, disazo, polyazo, diketopyrrolopyrrole. Selected from quinacridone, phthalocyanine, and titanium oxide, and the outermost wood grain pattern layer of the wood grain pattern layer reproduces black by mixing color with isoindolinone, diketopyrrolopyrrole, and phthalocyanine pigment without using carbon black pigment A heat-insulating decorative sheet having a grain pattern characterized by being made.   A coating layer is provided on the surface side of the overlay film layer, the overlay film layer is made of a random polypropylene resin with an ultraviolet absorber and a hindered amine light stabilizer added, and the coating layer is made of acrylic polyol and hexamethylene. 2. The heat-insulating decorative sheet having a wood grain pattern according to claim 1, comprising a diisocyanate added with an ultraviolet absorber and a hindered amine light stabilizer.