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High-strength tear-resistant reflective film and preparation process thereof

A preparation process and anti-tearing technology, which is applied in the field of reflective film, can solve the problems of easily generating bubbles or tearing on the surface of the reflective film, reducing the reflective ability of the reflective film, and reducing the service life of the reflective film. The effect of long life and good performance

Active Publication Date: 2020-11-06
CHANGZHOU RIYUE REFLECTIVE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Reflective film is a kind of retroreflective material that can be directly applied as a thin film. It is widely used in all aspects of life, such as road signs, truck body recognition, and clothing with warning functions. To warn, it will reflect clear and bright light at night or in the case of insufficient light to enhance the recognition ability of the human eye and effectively avoid accidents; the current mainstream types of reflective film mainly include: lens embedded reflective film, Lens-sealed reflective film, micro-prism reflective film; lens-embedded reflective film has low brightness when reflecting light, which cannot meet safety requirements; dimensional prism reflective film uses the principle of refraction and reflection of micro-prism to achieve reflective effect, but its effect on distance and The angle has certain requirements; the lens-sealed reflective film adopts glass bead reflective technology, although it has high reflective intensity and angle performance, but its brittleness and low mechanical strength, when the lens-sealed reflective film is in harsh environments for a long time When working, affected by the change of ambient temperature, the gas repeatedly expands and contracts, and the surface of the reflective film is prone to bubbles or tears, which reduces the reflective ability of the reflective film and reduces the service life of the reflective film. Moreover, the current base material and sealing material of the reflective film The main components are acrylic resin, polyurethane resin and other materials, which are very easy to age, and yellowing will affect the reflective effect

Method used

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  • High-strength tear-resistant reflective film and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Preparation of modified glass beads:

[0058] A. Preparation of modified microbeads A:

[0059] a. Add iminodiacetic acid into deionized water and stir to dissolve, raise the temperature to 68°C, add glycidyl methacrylate, stir and react at 250r / min for 3-5h to obtain solution A.

[0060] b. At room temperature, add glass microspheres into normal silane, stir evenly, add 2-bromoisobutyryl bromide and triethylamine in turn, increase the speed to 250r / min, continue to stir and react for 18h, and obtain microspheres a;

[0061] c. Add dimethylformamide to deionized water to dissolve, nitrogen protection, add microbeads a, solution A, copper bromide, cuprous bromide, bipyridine in turn, stir and react at 150r / min for 6h, filter Freeze-dry to obtain modified microbeads A.

[0062] B. Preparation of modified microbeads B:

[0063] a. Add a silane coupling agent to the ethanol solution, stir evenly, adjust the pH value to 3, add glass beads at 65°C, and stir for 1 hour...

Embodiment 2

[0080] (1) Preparation of modified glass beads:

[0081] A. Preparation of modified microbeads A:

[0082] a. Add iminodiacetic acid in deionized water and stir to dissolve, raise the temperature to 74°C, add glycidyl methacrylate, stir and react at 300r / min for 4h to obtain solution A.

[0083] b. At room temperature, add glass microspheres into normal silane, stir well, then add 2-bromoisobutyryl bromide and triethylamine in turn, increase the speed to 300r / min, continue stirring for 19h to obtain microspheres a;

[0084] c. Add dimethylformamide to deionized water to dissolve, nitrogen protection, add microbeads a, solution A, copper bromide, cuprous bromide, bipyridine in turn, stir and react at 200r / min for 7h, filter Freeze-dry to obtain modified microbeads A.

[0085] B. Preparation of modified microbeads B:

[0086] a. Add a silane coupling agent to the ethanol solution, stir evenly, adjust the pH value to 5, add glass beads at 75°C, and stir for 1.5 hours at a spe...

Embodiment 3

[0103] (1) Preparation of modified glass beads:

[0104] A. Preparation of modified microbeads A:

[0105] a. Add iminodiacetic acid to deionized water and stir to dissolve, raise the temperature to 82°C, add glycidyl methacrylate, and stir for 5h at 350r / min to obtain solution A.

[0106] b. At room temperature, add glass microbeads into n-silane, stir evenly, add 2-bromoisobutyryl bromide and triethylamine in turn, increase the speed to 350r / min, continue to stir and react for 20h to obtain microbeads a;

[0107] c. Add dimethylformamide to deionized water to dissolve, under nitrogen protection, add microbeads a, solution A, cupric bromide, cuprous bromide and bipyridine in turn, stir and react at 250r / min for 8h, filter Lyophilized to obtain modified microbeads A.

[0108] B. Preparation of modified microbeads B:

[0109] a. Add a silane coupling agent to the ethanol solution, stir evenly, adjust the pH to 6, add glass microbeads at 85°C, and stir for 2 hours at a speed...

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Abstract

The invention discloses a high-strength tear-resistant reflective film and a preparation process thereof. The preparation process comprises the steps of first modifying resin, mixing the modified resin with a defoaming agent, an anti-UV agent, a halogen-free flame retardant, a curing agent and fumed silica to obtain a base material, coating a PET film with the base material to obtain a plant film,coating the plant film with modified microspheres, enabling one part of each modified microsphere to sink into the base material, and coating the other part of each modified microsphere with a high-purity metal aluminum layer as a reflecting layer; coating the base material on the PET film to form a film, covering the film-formed PET film on a PVC bead planting film to obtain a composite film, pressing the composite film on a honeycomb-shaped grain heat sealing machine, and stripping the PET film to obtain a honeycomb-shaped reflective film. The prepared reflective film is high in strength, not easy to tear, high in reflectivity, not easy to discolor and age, and long in service life, has certain self-repairing capability, greatly prolongs the service cycle of the reflective film, and hasvery good use performance.

Description

technical field [0001] The invention relates to the field of reflective films, in particular to a high-strength tear-resistant reflective film and a preparation process thereof. Background technique [0002] Reflective film is a kind of retroreflective material that can be directly applied by making a film. It is widely used in all aspects of life, such as road signs, truck body identification, clothing with warning functions, etc. Its bright colors can be very attractive to people during the day. As a warning, clear and bright light will be reflected at night or in the case of insufficient light to enhance the recognition ability of the human eye and effectively avoid accidents. At present, the main types of reflective film are: lens embedded reflective film, Lens-sealed reflective film, micro-prism reflective film; lens-embedded reflective film has low brightness when reflecting light, which cannot meet safety needs; dimensional prism reflective film uses the principle of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/128
CPCG02B5/128
Inventor 陈标
Owner CHANGZHOU RIYUE REFLECTIVE MATERIAL