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Light-emitting/transmitting plastic lampshade and manufacture method thereof

A technology of luminescent pigments and lampshades, which is applied in the directions of luminescent materials, lampshades, chemical instruments and methods, can solve the problems of opacity and reduced light transmittance of luminescent pigments, and achieve the effect of high luminous brightness.

Inactive Publication Date: 2013-06-12
张海峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a luminescent lampshade, the luminescent pigment is added with luminescence, but the luminescent pigment is opaque, and the added luminescent pigment in turn leads to a decrease in light transmission, so the luminous lampshade must have both light transmission and luminescence

Method used

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  • Light-emitting/transmitting plastic lampshade and manufacture method thereof
  • Light-emitting/transmitting plastic lampshade and manufacture method thereof
  • Light-emitting/transmitting plastic lampshade and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0072] Example 1: This example is the application of extrusion molding to manufacture light-emitting lampshades.

[0073]

[0074] Among them, PC-30 luminescent plastic masterbatch contains 30% SrAl 2 o 4 :Eu 2+ , Dy 3+ Luminescent pigment, the average particle size of luminescent pigment is 30μm, and the brightness is 340mcd / m2 in 10 minutes.

[0075] Take 10kg of luminescent plastic masterbatch PC-30 and 8.34kg of PC2805 resin and dry at 80 degrees for 8 hours. Add the resin and other materials into a high-speed mixer and stir for 8 minutes at a speed of 860 rpm to distribute evenly at high speed. The mixed raw materials are extruded at 240-270° C. to make a luminescent lampshade with a thickness of 1.35 mm.

[0076] The processing temperature is as follows:

[0077] Location

Feeding section

compressed section

Plasticizing section

nose

Die

temperature / ℃

240～270

250～270

260～270

260～270

250～270

[0078] ...

example 2

[0082] Example 2: This example is the application of extrusion molding to manufacture luminescent and transparent lampshades.

[0083]

[0084]

[0085] Among them, the average particle size of the luminescent pigment is 90 μm, and the brightness is 600 mcd / m2 in 10 minutes.

[0086] Put other materials except luminescent pigments into a high-speed mixer and stir for 10 minutes at a speed of 860 rpm to distribute evenly at high speed. Then, the mixed material and the luminous pigment were stirred for 1.5 hours in a drum type plastic mixer at a speed of 30 rpm. The mixed raw materials are extruded into 1.8mm thick luminescent lampshade profiles according to the processing temperature of the following sections.

[0087] Processing temperature of each section:

[0088] Location

Feeding section

compressed section

Plasticizing section

nose

Die

temperature / ℃

150～160

180～190

195～205

195～205

205～210

[0089] Trac...

example 3

[0092] Example 3: This example is the application of injection molding to manufacture luminescent and transparent lampshades.

[0093]

[0094] Among them, the average particle size of the luminescent pigment is 90 μm, and the brightness is 660 mcd / m2 in 10 minutes.

[0095] Dry the PMMA resin at 85°C for 6 hours. Add other materials into a high-speed mixer (without luminescent pigments), and disperse evenly at high speed, then add luminescent materials and stir evenly, and the dispersion time should be short. The mixed raw materials are made into a luminous lampshade with a thickness of 3mm through injection molding process, such as image 3. The lampshade is also heat treated at 80°C for 6 hours to eliminate internal stress.

[0096] The injection processing parameters are as follows:

[0097]

[0098] Its luminous properties and light transmission properties are as follows:

[0099]

[0100] The lampshade can be in accordance with Figure 3 shown, bolted to th...

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Abstract

The invention relates to a light-emitting / transmitting plastic lampshade. The plastic lampshade takes one or more transparent or semitransparent thermoplastic resin as base resin and comprises a strontium aluminate salt luminous pigment, which is 10-30% in weight percentage and 30-120 mu m in particle size and is excited by rare earth europium ions and dysprosium ions. The chemical formula of the luminous pigment can be represented as SrAl2O4:Eu<2+>,Dy<3+> or Sr4Al14O25:Eu<2+>,Dy<3+>. Before being compounded with the base resin, the luminous pigment is subjected to cladding treatment by using polymethyl methacrylate with the thickness being 0.1-1 mu m at first. The molding method of the lampshade comprises the steps of extruding, injection molding and blow molding, and the lampshade has the thickness ranging from 1mm to 3mm. The lampshade has good light transmittance and luminance, is more than 65% in light transmittance, exceeds 80mcd / m<2> in luminance within 10min, and exceeds 10mcd / m<2> in luminance within 60min. The light-emitting / transmitting plastic lampshade can not only guarantee the daily illumination function but also fulfill functions of emergency illumination and evacuation indication in a dark environment, and is simple in structure, convenient to machine and obvious in cost advantage.

Description

Technical field [0001] The invention relates to a plastic lampshade, more specifically, the invention relates to a luminescent and light-transmitting plastic lampshade, which belongs to the field of emergency lighting or evacuation indication. Background technique [0002] Luminescent pigments and luminescent products have the function of absorbing light in bright places and emitting light in dark places, which can be used repeatedly. [0003] In the 1960s, zinc sulfide luminescent materials began to be used in clocks, toys and other fields. Since the 1990s, strontium aluminate luminescent products excited by rare earths have been more and more used in the field of emergency lighting or evacuation instructions because of their high brightness and long afterglow. IMO Resolution A.752(18) of the International Maritime Organization stipulates that ships with more than 25 passengers must install luminous products, and the minimum brightness requirement of luminous products is 1...

Claims

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Application Information

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IPC IPC(8): F21V3/04C09K11/64C09K11/02
Inventor 张海峰
Owner 张海峰
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