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Low-reflectivity black film, and method for manufacturing laminate

A technology of a low-reflection film and a manufacturing method, which can be applied to devices, coatings, instruments and other directions for coating liquid on the surface, can solve the problems of strong scattering and increased scattering reflectivity, and achieve the effect of excellent reflectivity

Active Publication Date: 2020-07-24
TOYO INK SC HOLD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the regular reflectance can be reduced, but there is a tendency that the scattering due to unevenness is strong and the scattering reflectance becomes larger.

Method used

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  • Low-reflectivity black film, and method for manufacturing laminate
  • Low-reflectivity black film, and method for manufacturing laminate
  • Low-reflectivity black film, and method for manufacturing laminate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0126] Hereinafter, although an Example is given and the present invention is demonstrated in detail, this invention is not limited to these Examples. In addition, "part" means a mass part unless otherwise noted.

[0127]

[0128] The hydroxyl value (OHV) and acid value (AV) were calculated|required based on JISK0070.

[0129]

[0130] The molecular weight distribution was measured using a gel permeation chromatography (Gel Permeation Chromatography, GPC) apparatus (HLC-8220 manufactured by Tosoh Corporation), and the mass average molecular weight (Mw) was calculated|required. Mw is the converted molecular weight using polystyrene as a standard substance. The measurement conditions are shown below.

[0131] Column: The following columns were connected in series and used.

[0132] Guard column H manufactured by Tosoh Corporation XL -H,

[0133] TSKgelG5000H manufactured by Tosoh Corporation XL ,

[0134] TSKgelG4000H manufactured by Tosoh Corporation XL ,

[0135] ...

Synthetic example 1

[0141] [Synthesis Example 1] (Binder Component: Synthesis of Solution of Acrylic Resin)

[0142] In a reaction vessel with a stirrer, a thermometer, a reflux cooler, a dropping device, and a nitrogen gas introduction pipe, add 20.0 parts of methyl methacrylate, 0.6 parts of methacrylic acid, 3.0 parts of 2-hydroxyethyl methacrylate, and 76.4 parts of n-butyl acrylate, and 100 parts of propylene glycol 1-monomethyl ether 2-acetate. These raw materials were heated up to 100 degreeC, stirring and mixing under nitrogen atmosphere. Thereafter, 0.5 part of azobisisobutyronitrile (azobisisobutyronitrile) was added, and a polymerization reaction was performed for 2 hours. Then, 0.5 parts of azobisisobutyronitrile was added every hour to perform a polymerization reaction until the conversion rate reached 98% or more. After confirming that the conversion rate was 98% or more, 50 parts of propylene glycol 1-monomethyl ether 2-acetate was added to the reaction solution for dilution. Th...

Synthetic example 2

[0143] [Synthesis Example 2] (Adhesive Component 1: Synthesis of Acrylic Resin Solution)

[0144] In a reaction vessel with a stirrer, a thermometer, a reflux cooler, a dropping device and a nitrogen inlet pipe, add 60 parts of n-butyl acrylate, 30 parts of methacrylate, 2-ethylhexyl acrylate (2-ethylhexyl acrylate) 5 parts, 5 parts of acrylic acid, 70 parts of ethyl acetate, and 0.10 parts of 2,2'-azobis(2-methylbutyronitrile). These raw materials were reacted at reflux temperature for 7 hours while stirring and mixing them under a nitrogen atmosphere. After completion of the reaction, ethyl acetate was added to the reaction solution for dilution to obtain a solution of an acrylic resin having a solid content of 30% and a weight average molecular weight Mw of 980,000.

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Abstract

The present invention provides a low-reflectivity black film having a good low-reflective property due to low reflectivity in both regular reflection and scattering reflection, having a sufficiently smooth surface, and having a high degree of blackness. The low-reflectivity black film according to the present invention includes a porous black pigment having a porosity of 50% or more and a binder component at a volume ratio of 50:50-100:0, wherein with regard to surface roughness parameters Rt, Ra, Rt is 0.15-5 [mu]m, and Ra is 0.01-0.5 [mu]m; an L* value is 20 or less; and in a range of 400-700 nm, the maximum value of the regular reflectivity is 0.8% or less, the maximum value of the scattering reflectivity is 2% or less, and the maximum value of the light transmittance is 5% or less.

Description

technical field [0001] The invention relates to a black low-reflection film and a method for manufacturing a laminate with the black low-reflection film. Background technique [0002] As a method of imparting low reflectivity to a film, there is known a method of making the film contain organic fine particles or inorganic fine particles to form irregularities on the surface of the film, thereby matting the film. In this method, the regular reflectance can be reduced, but there is a tendency that the scattering due to unevenness is strong and the scattering reflectance becomes large. [0003] As another method, there is a method of disposing a low-refractive-index film on the surface of the film. For example, Patent Document 1 discloses a multilayer film formed by forming a film having a lower refractive index than the colored low-resistance film on a colored low-resistance film containing highly conductive carbon black (claim 1 , claims 6-8). It is also disclosed that the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/111B05D5/06G02B5/00G02B5/20
CPCG02B1/04G02B5/22G02B1/041C08K3/04C08L33/10C08L2666/55G02B1/111G02B5/20B05D5/06C08F220/1804C08J5/18C08J2333/12C08K2201/006
Inventor 田中直宏
Owner TOYO INK SC HOLD CO LTD
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