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Long afterglow rare earth phosphor and polymer composite material

A technology of rare earth luminescence and composite materials, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of low afterglow brightness, poor chemical stability, and short time, and achieve the effects of long afterglow time, good stability, and high brightness

Inactive Publication Date: 2010-04-28
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sulfide long afterglow materials have obvious disadvantages: such as low afterglow brightness, short time, poor chemical stability, and easy deliquescence. Although some shortcomings can be overcome by adding radioactive elements and coating the material, the addition of radioactive elements is harmful to human health and environmental hazards, so the use of this material is greatly limited

Method used

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  • Long afterglow rare earth phosphor and polymer composite material
  • Long afterglow rare earth phosphor and polymer composite material

Examples

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Effect test

Embodiment 1

[0016] Example 1 The specific proportions of the long-lasting rare earth luminescent powder polymer composite material in parts by weight are: 15 parts of green long-lasting rare earth luminescent powder, 80 parts of high-density polyethylene (HDPE), 0.5 part of zinc stearate, antioxidant Agent (1010) 0.5 parts, paraffin 4 parts, castor oil 1 part.

[0017] Preparation method: According to the ratio, the above materials are extruded and granulated by twin-screw extruder, and the head temperature of the twin-screw extruder is 180°C.

Embodiment 2

[0019] The specific ratio of the long afterglow rare earth luminescent powder polymer composite material in parts by weight is:

[0020] 20 parts of green long-lasting rare earth luminescent powder, 75 parts of low-density polyethylene (LDPE), 1 part of zinc stearate, 1 part of antioxidant (1010), 3 parts of paraffin, and 1 part of castor oil.

[0021] Preparation method: According to the ratio, the above-mentioned materials are extruded and granulated by twin-screw extruder, and the head temperature of the twin-screw extruder is 160°C.

Embodiment 3

[0023] The specific ratio of the long afterglow rare earth luminescent powder polymer composite material in parts by weight is:

[0024] 30 parts of green long-lasting rare earth luminescent powder, 66 parts of ethylene vinyl acetate copolymer (EVA), 1 part of zinc stearate, 1 part of antioxidant (1010), 2 parts of paraffin, and 2 parts of castor oil.

[0025] Preparation method: According to the ratio, the above materials are extruded and granulated by twin-screw extruder, and the head temperature of the twin-screw extruder is 150°C.

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Abstract

The invention relates to a method for preparing a long afterglow rare earth phosphor and polymer composite material, which comprises the following steps: blending, extruding and pelleting various polymer materials such as high-density polyethylene (HDPE), low-density polyethylene (LDPE) and ethylene vinyl acetate (EVA), green long afterglow rare earth phosphor and other related addition agents with a double screw to prepare granules of the long afterglow rare earth phosphor and polymer composite material; and preparing various luminescent products by an injection molding or mould pressing method. The method effectively solves bottleneck problems of dispersion, adhesion, bright color, plasticization and the like in the process to prepare the environment-friendly material with long afterglow time, high luminance, good stability, and no toxicity or radiation. The performance of the material is that: the material has long fluorescent lifetime which is longer than 24 hours; the adhesive force is first grade; and the impact strength is 43kg / cm. The material can replace the traditional ZnS luminescent material, and can be applied to various safety exit signs in airplanes, ships, underground markets and the like, fir-fighting apparatus signs, public traffic stop boards, various rating plates, films, tapes, handicraft articles, ornaments, toys and the like.

Description

technical field [0001] The invention relates to a long afterglow rare earth luminescent powder and a polymer composite material. Background technique [0002] Long-lasting materials are materials that can store the energy of external light radiation and then slowly release the stored energy in the form of visible light. The long afterglow materials studied earlier are sulfide series long afterglow materials. In order to improve their luminous brightness and long afterglow time, they are often doped with radioactive elements, such as promethium and radium. Therefore, no external energy is needed, and the energy generated by the transformation of radioactive elements is used as the source of luminous energy. Sulfide long afterglow materials have obvious disadvantages: such as low afterglow brightness, short time, poor chemical stability, and easy deliquescence. Although some shortcomings can be overcome by adding radioactive elements and coating the material, the addition of ...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08K13/02C08K5/098C08K3/22C09K11/64
Inventor 莫志深于黎李成宇张会良苏锵
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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