Retroreflective sheet and preparation method thereof

A retro-reflective and reflective layer technology, applied in the direction of instruments, vehicle parts, printing, etc., can solve the problems of easy stickiness of reflective film, high pressure of winding core, falling off, etc., and achieve good wipeability, high production efficiency and convenient production Effect

Pending Publication Date: 2022-07-01
NIPPON CARBIDE INDS HANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the retroreflection coefficient and wipeability of this type of reflective film in the market still need to be improved. At the same time, the storage stability of existing products also needs to be improved. The printed blue ink is easy to stick to the release paper, and the roll of reflective film is easy to stick, causing problems such as loss of gloss and peeling off

Method used

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  • Retroreflective sheet and preparation method thereof
  • Retroreflective sheet and preparation method thereof
  • Retroreflective sheet and preparation method thereof

Examples

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preparation example Construction

[0071]

[0072] The present invention also provides the preparation method of the retroreflective sheet of the present invention, which comprises the following steps: printing ink on the surface of the reflective layer body containing glass microbeads arranged in a roll, and then drying at a temperature below 95°C, and the drying time is 40°C. seconds or more. If the temperature is above 95°C, the release paper will be defective due to the evaporation of moisture in the release paper. In some embodiments of the present invention, the drying time is 50 to 150 seconds in consideration of printability, drying and economy.

[0073] In some specific embodiments of the present invention, the thickness of the reflective layer body containing glass microbeads arranged in a roll is 100-500 μm. Further, the thickness is 120-400 μm, further 150-300 μm, in some specific embodiments of the present invention, the thickness of the reflective layer body 2 after removing the release layer i...

Embodiment 1

[0083] Preparation of the glass microbead-containing light-reflecting layer body: As the engineering substrate, a transparent polyethylene terephthalate film with a thickness of 75 μm (trade name: Teijin Tetoron Film S-75) manufactured by Teijin Co., Ltd. was used. Then, a methylated melamine resin solution (trade name: NIKALAC MS-11) manufactured by SANWACHEMICAL CO., LTD. was added to 100 parts by weight of an acrylic resin solution (trade name: RS-1200) manufactured by SANWACHEMICAL CO., LTD. 16 parts by weight, 6 parts by weight of a cellulose derivative (trade name: CAB) manufactured by TOKUSHIKI Co., Ltd., 1.5 parts by weight of an ultraviolet absorber (trade name: Seesorb 103) manufactured by SHIPRO KASEIKAISHA, LTD, BYK-Chemie Japan KK 0.05 parts by weight of a prepared leveling agent (trade name: BYK-300), 0.12 part by weight of a catalyst (trade name: BECKAMINE P-198) manufactured by DIC Co., Ltd., and 16.7 in a ratio of MIBK / toluene=8 / 2 as a solvent The resin mixed ...

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Abstract

The invention relates to a retroreflective sheet and a preparation method thereof. The retroreflective sheet sequentially comprises an erasable layer and a reflective layer body containing glass beads, the erasable layer is an ink layer containing organic pigment, and the particle size of the organic pigment does not exceed 600 nm. The retro-reflection sheet provided by the invention has the advantages of good wiping performance, high retro-reflection coefficient, low haze, high light transmission and good storage stability. The retroreflective sheet can be directly used for preparing the license plate, reduces the printing process, is convenient to manufacture and reduces the cost.

Description

technical field [0001] The invention relates to the field of reflective materials, in particular to a retroreflective sheet and a preparation method thereof. Background technique [0002] Retroreflective sheeting is widely used in public transportation, electricity, mining, decoration and other fields, with signs and warnings. Among them, retroreflective products are most widely used in license plates, and license plate-grade retroreflective sheets are reflective materials used to manufacture license plates, covering the outermost layer of license plates. The traditional license plate production process is to select an aluminum alloy plate as the license plate base material, clean the surface, paste the retroreflective sheet with adhesive on the aluminum alloy plate, and punch it into a semi-finished product with the size of the license plate by a punch. Blue ink is printed on the surface of the reflective film, and then the characters of the license plate are stamped to ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/128G02B1/14B60R13/10B41M1/04B41M1/10B41M1/30B41M7/00
CPCG02B5/128G02B1/14B60R13/10B41M1/04B41M1/10B41M1/30B41M7/009
Inventor 蒋纪辉韩剑钧陈燕肖岳堂
Owner NIPPON CARBIDE INDS HANGZHOU
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