CN103887412A - Preparation method and application method for LED lamp luminous plastic master batch - Google Patents

Abstract

The invention relates to the preparation and application method of a luminescent plastic masterbatch for LED lamps. By using one of polycarbonate (PC), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), after adding 5-30PHR phosphor powder, the required plastic can be produced Masterbatch: Plastic masterbatch can be made into luminous plastic sheets, luminous plastic lampshades, and luminous plastic lamp tubes by compression molding and blow molding. It can be applied to the light conversion unit of LED spotlights, LED bulb lamps, and LED light tubes.

Description

Preparation and application method of luminescent plastic masterbatch for LED lamp

technical field

The invention relates to the technical fields of polymer materials, inorganic luminescent materials and lighting, and relates to a preparation and application method of a light conversion material, in particular to a luminescent plastic masterbatch prepared by adjusting different phosphor components. A light-converting material that emits white light through light conversion and light coupling of blue light, that is, the preparation and application method of luminescent plastic masterbatch for LED lamps.

Background technique

The luminous efficiency of modern LED light-emitting diodes has been continuously improved with the advancement of technology, but the development of phosphor powder has restricted the development of white LED lighting industry. For example: the light conversion efficiency of phosphor powder is less than 40%, and the rest is emitted in the form of heat; in traditional LED packaging, the phosphor powder and the chip are in contact without gaps, so the heat cannot be dissipated. After long-term use, high temperature will shorten the life of the LED chip and phosphor powder. severely reduced. In particular, some such as silicate-based red phosphors and chlorosilicate-based green phosphors have poor heat resistance. Long-term high temperature and contact with air will inevitably lead to a decrease in the performance of the phosphors and affect the stability of LED lighting. and service life.

Traditional white LED packaging is to mix YAG phosphor with organic silica gel and evenly coat the surface of the LED chip. Due to the high density of YAG phosphor, it is easy to deposit, resulting in a large change in the color temperature of the packaged product; Poor dispersion, prone to inconsistencies in color temperature from all angles. In traditional white LED packaging, in order to adjust the color temperature, more red phosphors and green phosphors are added. Due to the difference in density of various phosphors, uneven mixing occurs. The theoretical color temperature is seriously inconsistent with the actual color temperature. The above phosphors The defects have seriously restricted the development of LED lighting products.

Organic polymer materials, such as polycarbonate (PC), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), have high light transmittance, and the light transmittance can reach 95 % or more, and the molding process is simple, it can be made into various shapes and specifications required, and the thickness of the finished product is well controllable. After the phosphor powder is added, the dispersion of the phosphor powder is better, and the color temperature of the LED lighting device can be controlled by adjusting the thickness of the luminescent plastic sheet, luminescent plastic lampshade, and luminescent plastic lamp tube.

Contents of the invention

The first technical problem to be solved by the present invention is to provide a preparation method of luminescent plastic masterbatch for LED lamps, which not only meets the various processing requirements and physical properties of the plastic masterbatch, but also requires that it can be processed by 450-470nm Excited by blue light, it has high light transmittance and light conversion efficiency.

The second technical problem to be solved by the present invention is to provide a luminescent plastic masterbatch, which has good flame retardancy and consistency, and has good operability and repeatability in its preparation method.

The third technical problem to be solved by the present invention is to provide the application field and usage method of the luminous plastic masterbatch for LED lamps.

In order to solve the above technical problems, the present invention is realized through the following technical solutions:

A method for preparing luminescent plastic masterbatches suitable for LED lamps. According to 100 parts by weight of the matrix organic polymer plastic, the composition ratio is: organic polymer plastic 100PHR; fluorescent powder 5-30phR; flame retardant 0.2-1.0PHR ; Other additives (antioxidant/anti-ultraviolet agent) 0.2-1.0PHR.

Wherein the organic macromolecular material can use any one in polycarbonate (PC), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA) as matrix, all can satisfy the requirements of the present invention Purpose.

The fluorescent powder is one or more of YAG yellow fluorescent powder, silicate-based red fluorescent powder, chlorosilicate-based green fluorescent powder, nitride and nitrogen oxide red fluorescent powder.

Wherein the flame retardant is a fluoropolymer flame retardant, such as high molecular weight polytetrafluoroethylene.

Wherein said other additives are phosphorous acid antioxidant and nano zinc oxide anti-ultraviolet agent.

A method for preparing a luminous plastic masterbatch for an LED lamp, the specific preparation steps are as follows:

1: Weigh organic polymer plastics, fluorescent powder, flame retardant and other additives according to the weight ratio;

2: Put the matrix polymer plastic, flame retardant and other additives into the feeding port of the twin-screw extruder, and the fluorescent powder is fed through the side feeding port, melted and then extruded and granulated;

Due to the different organic polymer plastic substrates, the temperature range in the processing technology is different:

a: The processing technology of polycarbonate (PC) is as follows: Twin-screw extruder zone 1 temperature 240-250°C, zone 2 temperature 250-260°C, zone 3 temperature 260-270°C, zone 4 temperature 270-275°C, zone 5 The zone temperature is 265-270°C, the sixth zone temperature is 270-280°C, the die head temperature is 275-280°C, and the pressure is 2-2.5MPa.

b: The processing technology of polyethylene terephthalate (PET) is as follows: twin-screw extruder, the temperature in the first zone is 260-265°C, the temperature in the second zone is 265-270°C, the temperature in the third zone is 270-275°C, and the temperature in the fourth zone 275-280°C, the temperature of the fifth zone is 280-285°C, the temperature of the sixth zone is 285-290°C, the temperature of the die head is 290-295°C, and the pressure is 2-2.5MPa.

c: The processing technology of polymethyl methacrylate (PMMA) is as follows: Twin-screw extruder zone 1 temperature 170-175°C, zone 2 temperature 175-180°C, zone 3 temperature 180-185°C, zone 4 temperature 185-190 ℃, the temperature of the fifth zone is 190-195℃, the temperature of the sixth zone is 195-200℃, the temperature of the die head is 210-220℃, and the pressure is 35-100MPa.

The invention adopts the phosphor powder side-feed feeding method, which can solve the dispersion problem of the phosphor powder in the luminescent plastic master batch, so that the light transmittance and luminous efficiency of the luminescent plastic master batch are improved.

The present invention also relates to a method of using luminescent plastic masterbatch:

The luminous plastic masterbatch made can be divided into three luminescent colors of red, yellow and green according to the addition of phosphor powder. Yellow luminescent plastic masterbatch can be used alone to make luminescent plastic devices through compression molding and blow molding; it can also be used in combination with yellow and red and green luminescent plastic masterbatches to make luminescent plastic devices through compression molding and blow molding processes. Luminous plastic devices. The color temperature of the luminescent plastic device is related to the addition ratio of the luminescent plastic masterbatch prepared in the present invention. Under the excitation of the blue light of 450-470nm from the LED chip, the manufactured luminescent plastic device emits white light through light conversion and light coupling. It maintains a certain distance from the LED chip matrix, has high luminous efficiency, less intermediate process, and high yield. The advantages.

Detailed ways

Preparation of plastic masterbatch

A method for preparing luminescent plastic masterbatches suitable for LED lamps. According to 100 parts by weight of the matrix organic polymer plastic, the composition ratio is: organic polymer plastic 100PHR; fluorescent powder 5-30phR; flame retardant 0.2-1.0PHR ; Other additives (antioxidant/anti-ultraviolet agent) 0.2-1.0PHR.

Wherein the organic macromolecular material can use any one in polycarbonate (PC), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA) as matrix, all can satisfy the requirements of the present invention Purpose.

The fluorescent powder is one or more of YAG yellow fluorescent powder, silicate-based red fluorescent powder, chlorosilicate-based green fluorescent powder, nitride and nitrogen oxide red fluorescent powder.

Wherein the flame retardant is a fluoropolymer flame retardant, such as high molecular weight polytetrafluoroethylene.

Wherein said other additives are phosphorous acid antioxidant and nano zinc oxide anti-ultraviolet agent.

Example 1:

Weigh the following raw materials according to weight ratio (PHR): polycarbonate (PC) 100PHR; flame retardant 0.3PHR; YAG yellow fluorescent powder 25PHR; other additives 0.4PHR. Put polycarbonate, flame retardant and other additives into the hopper of the twin-screw extruder; YAG yellow fluorescent powder is fed through the side feeding port, melted and then extruded and granulated. The processing technology is as follows: Twin-screw extruder, the temperature of the first zone is 240-250°C, the temperature of the second zone is 250-260°C, the temperature of the third zone is 260-270°C, the temperature of the fourth zone is 270-275°C, the temperature of the fifth zone is 265-270°C, the temperature of the six The zone temperature is 270-280°C, the die head temperature is 275-280°C, and the pressure is 2-2.5MPa.

Example 2:

Weigh the following raw materials according to the weight ratio (PHR): polycarbonate (PC) 100PHR; flame retardant 0.3PHR; YAG yellow phosphor 22PHR; nitride red phosphor 3PHR; other additives 0.4PHR. Put polycarbonate, flame retardant and other additives into the hopper of the twin-screw extruder; YAG yellow phosphor and nitride red phosphor are fed through the side feeding port, melted and then extruded and granulated. The processing technology is as follows: Twin-screw extruder, the temperature of the first zone is 240-250°C, the temperature of the second zone is 250-260°C, the temperature of the third zone is 260-270°C, the temperature of the fourth zone is 270-275°C, the temperature of the fifth zone is 265-270°C, the temperature of the six The zone temperature is 270-280°C, the die head temperature is 275-280°C, and the pressure is 2-2.5MPa.

Example 3

Weigh the following raw materials according to the weight ratio (PHR): polycarbonate (PC) 100PHR; flame retardant 0.3PHR; YAG yellow phosphor 22PHR; silicate-based red phosphor 3PHR; other additives 0.4PHR. Put polycarbonate, flame retardant and other additives into the hopper of the twin-screw extruder; YAG yellow phosphor and silicate-based red phosphor are mixed and then fed through the side feeding port, melted and extruded to make grain. The processing technology is as follows: Twin-screw extruder, the temperature of the first zone is 240-250°C, the temperature of the second zone is 250-260°C, the temperature of the third zone is 260-270°C, the temperature of the fourth zone is 270-275°C, the temperature of the fifth zone is 265-270°C, the temperature of the six The zone temperature is 270-280°C, the die head temperature is 275-280°C, and the pressure is 2-2.5MPa.

Example 4

Weigh the following raw materials according to the weight ratio (PHR): polycarbonate (PC) 100PHR; flame retardant 0.3PHR; YAG yellow phosphor 20PHR; chlorosilicate-based green phosphor 3PHR; silicate-based red phosphor 2PHR ; Other additives 0.4PHR. Put polycarbonate, flame retardant and other additives into the hopper of the twin-screw extruder; YAG yellow phosphor, chlorosilicate-based green phosphor and silicate-based red phosphor are fully mixed and fed through the side Mouth feeding, extrusion after melting, pelletizing. The processing technology is as follows: Twin-screw extruder, the temperature of the first zone is 240-250°C, the temperature of the second zone is 250-260°C, the temperature of the third zone is 260-270°C, the temperature of the fourth zone is 270-275°C, the temperature of the fifth zone is 265-270°C, the temperature of the six The zone temperature is 270-280°C, the die head temperature is 275-280°C, and the pressure is 2-2.5MPa.

Example 5

Weigh the following raw materials according to weight ratio (PHR): polycarbonate (PC) 100PHR; flame retardant 0.3PHR; silicate-based red phosphor powder 25PHR; other additives 0.4PHR. Put polycarbonate, flame retardant and other additives into the hopper of the twin-screw extruder; the silicate-based red phosphor is fed through the side feeding port, melted, extruded, and pelletized. The processing technology is as follows: Twin-screw extruder, the temperature of the first zone is 240-250°C, the temperature of the second zone is 250-260°C, the temperature of the third zone is 260-270°C, the temperature of the fourth zone is 270-275°C, the temperature of the fifth zone is 265-270°C, the temperature of the six The zone temperature is 270-280°C, the die head temperature is 275-280°C, and the pressure is 2-2.5MPa.

Example 6

Weigh the following raw materials according to weight ratio (PHR): polycarbonate (PC) 100PHR; flame retardant 0.3PHR; nitride red phosphor 25PHR; other additives 0.4PHR. Put polycarbonate, flame retardant and other additives into the hopper of the twin-screw extruder; nitride red phosphor is fed through the side feeding port, melted and then extruded and granulated. The processing technology is as follows: Twin-screw extruder, the temperature of the first zone is 240-250°C, the temperature of the second zone is 250-260°C, the temperature of the third zone is 260-270°C, the temperature of the fourth zone is 270-275°C, the temperature of the fifth zone is 265-270°C, the temperature of the six The zone temperature is 270-280°C, the die head temperature is 275-280°C, and the pressure is 2-2.5MPa.

Example 7

Weigh the following raw materials according to weight ratio (PHR): polycarbonate (PC) 100PHR; flame retardant 0.3PHR; chlorosilicate-based green fluorescent powder 25PHR; other additives 0.4PHR. Put polycarbonate, flame retardant and other additives into the hopper of the twin-screw extruder; chlorosilicate-based green fluorescent powder 25PHR is fed through the side feeding port, melted and then extruded and granulated. The processing technology is as follows: Twin-screw extruder, the temperature of the first zone is 240-250°C, the temperature of the second zone is 250-260°C, the temperature of the third zone is 260-270°C, the temperature of the fourth zone is 270-275°C, the temperature of the fifth zone is 265-270°C, the temperature of the six The zone temperature is 270-280°C, the die head temperature is 275-280°C, and the pressure is 2-2.5MPa.

Example 8

Weigh the following raw materials according to weight ratio (PHR): polyethylene terephthalate (PET) 100PHR; flame retardant 0.3PHR; YAG yellow fluorescent powder 15PHR; other additives 0.4PHR. Put polycarbonate, flame retardant and other additives into the hopper of the twin-screw extruder. YAG yellow fluorescent powder is fed through the side feeding port, extruded and granulated after melting. The processing technology is as follows: twin-screw extruder, the temperature of the first zone is 260-265°C, the temperature of the second zone is 265-270°C, the temperature of the third zone is 270-275°C, the temperature of the fourth zone is 275-280°C, the temperature of the fifth zone is 280-285°C, the temperature of the six The zone temperature is 285-290°C, the die head temperature is 290-295°C, and the pressure is 2-2.5MPa.

Example 9

Weigh the following raw materials according to the weight ratio (PHR): polyethylene terephthalate (PET) 100PHR; flame retardant 0.3PHR; nitride red phosphor 15PHR; other additives 0.4PHR. Put polycarbonate, flame retardant and other additives into the hopper of the twin-screw extruder; nitride red phosphor is fed through the side feeding port, melted and then extruded and granulated. The processing technology is as follows: twin-screw extruder, the temperature of the first zone is 260-265°C, the temperature of the second zone is 265-270°C, the temperature of the third zone is 270-275°C, the temperature of the fourth zone is 275-280°C, the temperature of the fifth zone is 280-285°C, the temperature of the six The zone temperature is 285-290°C, the die head temperature is 290-295°C, and the pressure is 2-2.5MPa.

Example 10

Weigh the following raw materials according to the weight ratio (PHR): polymethyl methacrylate (PMMA) 100PHR; flame retardant 0.3PHR; nitride red phosphor 20PHR; other additives 0.4PHR. Put polycarbonate, flame retardant and other additives into the hopper of the twin-screw extruder; nitride red phosphor is fed through the side feeding port, melted and then extruded and granulated. The processing technology is as follows: twin-screw extruder, the temperature of the first zone is 170-175°C, the temperature of the second zone is 175-180°C, the temperature of the third zone is 180-185°C, the temperature of the fourth zone is 185-190°C, the temperature of the fifth zone is 190-195°C, the temperature of the six The zone temperature is 195-200°C, the die head temperature is 210-220°C, and the pressure is 70-75MPa.

Example 11

Weigh the following raw materials according to weight ratio (PHR): polymethyl methacrylate (PMMA) 100PHR; flame retardant 0.3PHR; YAG yellow fluorescent powder 20PHR; other additives 0.4PHR. Put polycarbonate, flame retardant and other additives into the hopper of the twin-screw extruder; YAG yellow fluorescent powder is fed through the side feeding port, melted and then extruded and granulated. The processing technology is as follows: twin-screw extruder, the temperature of the first zone is 170-175°C, the temperature of the second zone is 175-180°C, the temperature of the third zone is 180-185°C, the temperature of the fourth zone is 185-190°C, the temperature of the fifth zone is 190-195°C, the temperature of the six The zone temperature is 195-200°C, the die head temperature is 210-220°C, and the pressure is 70-75MPa.

A kind of use method that the present invention relates to, the luminescent plastic masterbatch that adopts PET, PMMA as matrix to make is described below only taking polycarbonate (PC) as the matrix as an example, and the plastic masterbatch that adopts PET, PMMA to make can be exemplified according to PC Use method changes, but does not depart from the category of the patent of the present invention.

The number ① of the luminescent plastic master batch made in Example 1; the number ② of the luminescent plastic master batch made in Example 5; the number ③ of the luminescent plastic master batch made in Example 6; the number ④ of the luminescent plastic master batch made in Example 7.

Example 12

Weigh the luminescent plastic masterbatch ①, and carry out compression molding at a temperature of 270°C and a pressure of 5MPa to make a luminescent plastic sheet with a thickness of 0.5mm, or perform blow molding at a temperature of 270°C to make a luminescent plastic sheet with a thickness of 0.5mm Plastic lampshades and luminous plastic tubes. LED spotlights, LED bulb lamps, and LED tubes are tested after being manufactured with 457.5nm blue light chips. The color temperatures are 4500K, 4460K, and 4475K respectively; the luminous lumen efficiency can reach 110±51m/w.

Example 13

Weigh the luminescent plastic masterbatch ①95wt% and ②5wt% according to the mass percentage, carry out compression molding at a temperature of 270°C, and a pressure of 5MPa to make a luminescent plastic sheet with a thickness of 0.5mm, or carry out blow molding at a temperature of 270°C. 0.5mm thick luminous plastic lampshade and luminous plastic lamp tube. LED spotlights, LED bulb lamps, and LED tubes are tested after being manufactured with 457.5nm blue light chips. The color temperatures are 3090K, 3050K, and 3065K respectively; the luminous lumen efficiency can reach 95±51m/w.

Example 14

Weigh the luminescent plastic masterbatch ①98wt% and luminescent plastic masterbatch ③2wt% by mass percentage, carry out compression molding at a temperature of 270°C, and a pressure of 5MPa to make a luminescent plastic sheet with a thickness of 0.5mm, or blow it at a temperature of 270°C Molding to make 0.5mm thick luminous plastic lampshades and luminous plastic lamp tubes. LED spotlights, LED bulb lamps, and LED tubes are tested after being made with 457.5nm blue light chips. The color temperatures are 2890K, 2849K, and 2863K respectively; the luminous lumen efficiency can reach 105±51m/w.

Example 15

Weigh the luminescent plastic masterbatch ① 95wt%; the luminescent plastic masterbatch ③ 3wt%; the luminescent plastic masterbatch ④ 2wt% by mass percentage, carry out compression molding at a temperature of 270°C, and a pressure of 5MPa to make a luminescent plastic sheet with a thickness of 0.5mm, or Blow molding is carried out at a temperature of 270° C. to make a luminous plastic lampshade and a luminous plastic lamp tube with a thickness of 0.5 mm. LED spotlights, LED bulbs, and LED tubes were tested after being manufactured with 457.5nm blue light chips, and their color temperatures were 3300K, 3270K, and 3290K, respectively. The luminous lumen efficiency can reach 100±51m/w.

The specific embodiments above are used to describe the purpose, features and effects of the present invention in detail. For those familiar with this type of technology, according to the above description, some changes and modifications may be made to the specific embodiments without departing from the essence. Those who belong to the spiritual category of the present invention should be included in the patent application scope of this case.

Claims (9)

1. the preparation method who the present invention relates to a kind of LED lamp luminous plastics mother granule, is 100 weight portions by matrix organic polymer plastics, and composition and ratio is: organic polymer plastics 100PHR; Fluorescent material 5-30PHR; Fire retardant 0.2-1.0PHR; Other auxiliary agents (antioxidant/anti ultraviolet agent) 0.2-1.0PHR.

2. according to claim 1: fluorescent material is wherein one or more in YAG yellow fluorescent powder, silicate-base red fluorescence powder, chloride silicate-based green emitting phosphor, nitride and nitrogen oxide red fluorescence powder.

3. according to claim 1: wherein high-molecular organic material can use any one in Merlon (PC), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA).

4. according to claim 1: wherein fire retardant is a kind of fluorine-based polymer fire retardant, as the polytetrafluoroethylene of HMW.

5. according to claim 1: wherein said other auxiliary agent is phosphorous acid class antioxidant and nano zine oxide anti ultraviolet agent.

6. a preparation method for plastic master batch for LED lamp, comprises step, it is characterized in that:

1) take by weight ratio organic polymer plastics, fluorescent material, fire retardant and other auxiliary agent;

2) matrix high molecule plastic, fire retardant and other auxiliary agent are dropped into the charge door of double screw extruder, fluorescent material is fed a mouthful charging through side, extrudes, granulation after melting;

Because of the difference of organic polymer plastic substrate, in processing technology, temperature range is different:

A) Merlon (PC) processing technology is as follows: double screw extruder one district temperature 240-250 DEG C, two district temperature 250-260 DEG C, three district temperature 260-270 DEG C, four district temperature 270-275 DEG C, five district temperature 265-270 DEG C, six district temperature 270-280 DEG C, die head temperature is 275-280 DEG C, pressure is 2-2.5MPa;

B) polyethylene terephthalate (PET) processing technology is as follows: double screw extruder one district temperature 260-265 DEG C, two district temperature 265-270 DEG C, three district temperature 270-275 DEG C, four district temperature 275-280 DEG C, five district temperature 280-285 DEG C, six district temperature 285-290 DEG C, die head temperature is 290-295 DEG C, pressure is 2-2.5MPa;

C) polymethyl methacrylate (PMMA) processing technology is as follows: double screw extruder one district temperature 170-175 DEG C, two district temperature 175-180 DEG C, three district temperature 180-185 DEG C, four district temperature 185-190 DEG C, five district temperature 190-195 DEG C, six district temperature 195-200 DEG C, die head temperature is 210-220 DEG C, pressure is 35-100MPa.

7. relate to the occupation mode of LED lamp plastic master batch herein, luminous plastics mother granule, according to the difference of adding fluorescent material, can be divided into three kinds of luminous plastics mother granules of red, yellow, and green.The Yellow luminous plastic master batch that it is characterized in that can be used alone, also can be used in conjunction with red and green emitting plastic master batch, makes light-emitting plastic device by compression moulding, blow moulding process; The light-emitting plastic device of making, under LED chip 450-470nm blue-light excited, transformed with optical coupling and is sent white light by light.

8. according to claim 7: the Yellow luminous plastic master batch that it is characterized in that can be used alone is by the mode of compression moulding, blow molding, make light-emitting plastic device, also can use Yellow luminous plastic master batch to coordinate by compression moulding, blow moulding process with red and green emitting plastic master batch, make light-emitting plastic device.

9. according to claim 7: it is characterized in that the light-emitting plastic device made, under LED chip 450-470nm blue-light excited, transformed with optical coupling and sent white light by light; Between light-emitting plastic device and LED chip matrix, maintain a certain distance.