TW201520017A - Plastic granules and preparation method thereof - Google Patents

Abstract

The present invention discloses a plastic granule and the preparation method thereof. The said plastic granule consists of a plastic powder, a light diffusing powder and an anti-blue powder. The said preparation process is using said plastic powder as a raw material and uniformly mixing with said light diffusing powder and said anti-blue powder. Then, it was heated to become a melt which is a semi-solid state or a liquid state. After cooling and drying said melt, the said plastic granule was made when executing a process of granulation. Therefore, plastic products made from said plastic granule which contains said light diffusing powder and said anti-blue powder can evenly have light diffusion and absorb or filter blue light. The present invention can improve the complex production process problems which need coating an anti-blue film or add an anti-blue layer on the products.

Description

Plastic masterbatch and its manufacturing method

The invention relates to a plastic masterbatch and a manufacturing method thereof, in particular to a plastic masterbatch capable of uniformly diffusing light at the same time, and absorbing and blocking blue light, and a manufacturing method thereof.

Light is divided into visible light and invisible light. Infrared and ultraviolet light are invisible light, while red, orange, yellow, green, blue, enamel and purple light are visible light. Ultraviolet (UV), also known as ultraviolet light, can be classified into near ultraviolet light (Near UV). Or UVC), medium ultraviolet (Mid UV or UVB) and far ultraviolet (Far UV or UVA), wherein the near ultraviolet wavelength range is about 190-280 nm, most of which will be absorbed by the ozone layer by the atmosphere, and the middle ultraviolet (wavelength) The range is about 280-315nm) and the far-ultraviolet light (the wavelength range is about 315-380nm), which will damage the human skin, cause erythema of the skin, precipitate melanin, and even cause skin cancer, so it is often necessary to use hats and sleeves in daily life. Cover with sunscreen or other sunscreen to apply sunscreen to prevent long-term exposure to UV rays.

The wavelength of visible light in the electromagnetic spectrum is between 380 nm and 700 nm. This wavelength range is the electromagnetic spectrum that can be perceived by the human eye. The blue light belongs to the visible light with strong energy. The wavelength of blue light in the electromagnetic spectrum is between 390 nm and 500 nm. The excessive blue light will penetrate the cornea and the crystal of the human eye, and directly enter the macula to cause the macula. Photoreceptor damage, in addition, blue light will produce free radicals in the retina, and free radicals will cause the retinal pigment epithelial cells to die, which will make the light-sensitive cells lack nutrients. Moreover, due to the shorter wavelength of blue light, the scattering is more serious than other visible light. When the eyes are focused for a long time, they will fatigue and form pseudomyopia.

In order to maintain high brightness, Blu-ray is not only found in general light, but also in the light emitted by various electronic products, such as smart phone screens, computer screens and LCD TV screens or other LED-related products. It will use blue light stronger than the traditional image tube; in addition, the current white LED production technology is mainly divided into two major mainstreams. The first type is to use yellow light fluorescent powder to convert the blue light generated by the blue LED into white light. This technology is called Phosphor Converted-LED, and the second type is multi-wafer white LED. By combining two (or more) LEDs of different color to form white light, Currently, white LED products on the market are most commonly used with blue LED chips and yellow fluorescent powders. Therefore, LED light sources commonly used for lighting in daily life will also emit high-intensity blue light, and as the government expects to be in the next few years, Will completely eliminate incandescent bulbs and switch to LED power-saving lighting, more and more people buy products with anti-blue light function, such as anti-blue lens, anti-blue screen and anti-blue Light shade, so as to prevent the blue light damage human eyes, causing eye disease (e.g., macular degeneration, etc.); Technology To solve the above problem, in a conventional current As the main raw material, the plastic raw material is processed into the outer cover of the lighting fixture through injection, extrusion or extrusion and pultrusion technology. However, since the raw material itself does not have the function of absorbing and blocking blue light, it is necessary to add a blue light-resistant layer to the product. Or by applying a blue light-resistant film to the product through a coating process, such as the Republic of China Patent Bulletin No. M463663 "Composition of anti-blue protective stickers", which discloses a functional layer on a substrate. And a protective film, wherein the functional layer comprises a blue light blocking agent, so that the protective sticker of the composition can effectively reduce the damage of the blue light existing on the object during use, and the processing layer is complicated in the manufacturing process, and further The coated product will reduce the brightness and cause a difference in visual brightness. Therefore, how to provide a product that does not require secondary processing, that is, a blue light-resistant film is coated by a coating method, thereby achieving a blue light-resistant function. Need to solve the problem.

In view of the above problems, the present inventors have researched and improved plastic masterbatch based on years of experience in related industries and manufacturing of plastic masterbatch, and have been able to design a physical product that can solve the above problems; thus, the present invention The main object is to provide a plastic masterbatch which can be processed into a plastic finished product which directly has a uniform diffusion of light, and which absorbs and blocks blue light, and a manufacturing method of the plastic masterbatch.

In order to achieve the above object, a plastic masterbatch of the present invention comprises a plastic powder, a light diffusing powder and an anti-blue light powder, wherein the plastic powder is a high molecular polymer, such as Polycarbonate (Polycarbonate), polyethylene terephthalate, polystyrene, polymethylmethacrylate, etc. Further, the light-diffusing powder is an epoxy resin. (Silicone resin), further, the anti-blue light powder is a yellow pigment (Pigment yellow); firstly, 85 to 95% by weight of the plastic powder, 0.1 to 10% by weight of the light-diffusing powder and 2~ 14.5% by weight of the anti-blue light powder is uniformly mixed and heated to melt into a semi-solid or liquid melt, and then subjected to a drawing operation, and after being cooled and dried and solidified, the pelletizer is used for pelletizing. Manufacture of plastic masterbatch.

In order for your review board to have a clear understanding of the contents of the present invention, please refer to the following description only.

10‧‧‧Plastic masterbatch

101‧‧‧Plastic powder

102‧‧‧Light diffusing powder

103‧‧‧Anti-blue light powder

104‧‧‧Anti-UV powder

S1‧‧‧Material mixing and melting steps

S2‧‧‧ Cooling and curing steps

S3‧‧‧granulation processing steps

Fig. 1 is a schematic view showing the composition of the plastic masterbatch of the present invention.

Fig. 2 is a schematic view showing another embodiment of the plastic master batch of the present invention.

Fig. 3 is a flow chart showing a method of producing a plastic master batch of the present invention.

Please refer to "FIG. 1", which is a schematic diagram of the composition of the plastic masterbatch of the present invention. A plastic masterbatch 10 as shown in the figure mainly comprises a plastic powder body 101, a light diffusing powder body 102 and a primary antibody. The blue powder powder 103 is composed of a plastic powder body 101 (also referred to as a plastic particle having a small particle size) as a high molecular polymer, which is a main raw material in the finished plastic product, according to the physical and chemical properties of the material molecules. It can be divided into thermoplastic plastics (Thermo plastics) and thermoset plastics (Thermoset plastics). Among them, it is fluid after heating, and after cooling, it becomes a thermoplastic. It can be processed by plasticity during heating. In the manufacture of thermosetting plastics, the molecules undergo chemical changes due to heat, the molecular structure changes, and finally lose their plasticity, and cannot be remelted or softened. The plastic powder 101 of the high molecular polymer of the present invention is a thermoplastic polymer polymerization. And more specifically, it may be polycarbonate (polyethylene terephthalate), polyethylene terephthalate, polystyrene or poly Polymethylmethacrylate: (1) Polycarbonate: PC for short, which is high in the molecular chain containing a carbonate group (the formula of the formula is RO-CO-OH or RO-CO-OR') Molecular polymer, which is colorless and transparent, has high impact resistance, abrasion resistance and heat resistance (melting point of about 220-230 ° C), and has good mechanical properties at ordinary use temperatures. The light rate is about 88%, and has good light transmittance. Further, the light refractive index is 1.59, and has a high refractive index; (2) Polyethylene terephthalate: referred to as PET, which is responsive to esterification (Esterification) and polycondensation of Benzenedicarboxylic acid (PBT) and Ethylene glycol (EG). (Condensation polymerization), which has good mechanical properties, is resistant to most solvents, and its heat distortion temperature and long-term use temperature are the highest among thermoplastics. Moreover, its light transmittance is about 88%. Good light transmittance, in addition, the refractive index of light is 1.58, also has a high refractive index; (3) Polystyrene: PS, is a polymer of styrene monomer (SM). It has a glass transition temperature higher than 100 degrees Celsius, so it is often used to make disposable containers that can withstand high temperature hot water. In addition, its light transmittance is about 88%, it has good transparency, and its refractive index is 1.59. , also has a high refractive index, of course, there are shortcomings such as low impact strength and easy stress cracking; (4) Polymethylmethacrylate: referred to as PMMA, commonly known as acrylic, from methyl methacrylate (Methyl methacrylate, PMMA) polymerized with high mechanical strength. In addition, its refractive index is 1.49. Although it is lower than the above three high molecular polymers, its light transmittance is over 92%. It is the most excellent polymer at present. Light transmissive material.

The plastic masterbatch 10 of the present invention is used to spread light more evenly. The light is evenly distributed and soft, and the contrast between light and dark is weakened. Therefore, the light diffusing powder 102 is added; the light diffusion efficiency depends on the difference in refractive index between different media, and the greater the difference in refractive index between the media, the larger the angle of light deflection In other words, the haze and uniformity of the light are higher; the light diffusing powder 102 is a Silicone resin, which is characterized by high thermal stability, oxidation resistance, electrical insulation, and weather resistance. Good and good optical light transmissive materials, and currently, the commonly used oxime resin can be roughly divided into a long chain structure of a fluorene oxide having a methyl group as a side chain or a phenyl side chain, wherein the methyl group is a side The chain of the epoxy resin has excellent thermal stability, and the refractive index of the light ranges from about 1.41 to 1.42, and the refractive index of the plastic powder 101 described above (PMMA is 1.49, PET is 1.58, PC is 1.59). The difference between the two is large, so that the plastic masterbatch 10 prepared by mixing the methyl ether as a side chain can greatly improve the haze and uniformity of the light; and, as long as the light-diffusing powder 102 is as described above, The addition can produce the desired light diffusion effect, but it is not special Limiting the particle diameter of the light diffusing powder 102, however, the average particle diameter preferably ranging between 2 ~ 10μm.

Further, the plastic masterbatch 10 of the present invention is capable of absorbing and blocking blue light, especially blue light having a wavelength ranging from 390 nm to 500 nm, so that the anti-blue light powder 103 is added, and the relative position on the hue ring is according to color theory. The two colors are complementary colors. Common complementary colors are red and cyan, green and magenta, and blue and yellow. In addition, the important characteristic of complementary color, that is, a color light that illuminates its complementary color, will be absorbed. Therefore, the blue light-resistant powder 103 of the present invention is a yellow pigment (Pigment yellow), and more specifically, the color index number (CInumber) is CI11680 (CIPigment yellow). 1), a yellow toner of CI11665 (CIPigment yellow 4), CI21090 (CIPigment yellow 12) or CI73462 (CIPigment yellow 13); in addition, as long as the addition of the anti-blue light powder 103 can produce The absorption and blocking of the blue light effect are not particularly limited to the particle diameter of the blue light-resistant powder 103. However, the ideal average particle diameter is between 3 and 8 μm.

Please refer to FIG. 2, which is a schematic view of another embodiment of the plastic masterbatch of the present invention. As shown in the figure, the composition of the plastic masterbatch 10 of the present invention is in addition to the plastic powder 101 and the light-diffusing powder 102. In addition to the blue light-resistant powder 103, an anti-ultraviolet powder 104 may be added to achieve uniform diffusion of light and absorption and blocking of ultraviolet light and blue light; wherein the ultraviolet light powder 104 is ultraviolet. A light absorbing agent, which is a light stabilizer, capable of absorbing ultraviolet light in a sunlight and a fluorescent light source (especially ultraviolet light having a wavelength ranging from 280 nm to 380 nm) without changing itself, and having good chemical stability. It does not react adversely with other materials in the product, and further, it has good miscibility and can be uniformly dispersed in the material; the ultraviolet powder 104 of the present invention may be Phenyl salicylate, 2,4-Dihydroxybenzophenone or 2-Hydroxy-4-Methoxybenzophenone: (1) phenyl salicylate ( Phenyl salicylate): also known as phenyl hydroxybenzoate, which can be composed of salicylic acid and salicylic acid. Phenol is obtained by heating in the presence of a dehydrating agent such as phosphorus pentachloride (Phosphorus pentachloride). It is a white crystalline powder and is an ultraviolet light absorber capable of absorbing ultraviolet light with a maximum absorption wavelength of 290 nm to 330 nm; (2) 2,4-Dihydroxybenzophenone: a reaction of resorcinol (Benzene-1,3-diol) with benzamidine chloride After refining, it is a pale yellow needle crystal powder or white powder. It is an ultraviolet light absorber that absorbs ultraviolet light and has a maximum absorption wavelength between 280 nm and 340 nm. (3) 2-Hydroxy-4-methoxy 2-Hydroxy-4-Methoxybenzophenone: Resorcinol is used as a raw material, and is purified by methylation reaction with dimethyl sulfate (Dimethy sulfate) in the presence of a sodium hydroxide (NaOH) catalyst. It is a pale yellow crystalline powder, an ultraviolet light absorber that absorbs ultraviolet light and has a maximum absorption wavelength between 290 nm and 380 nm.

For the continuation, please refer to "Fig. 3", which is a flow chart of the method for manufacturing the plastic masterbatch of the present invention. As shown in the figure, it comprises: (1) raw material mixing and melting step S1: 85 to 95% by weight a plastic powder, 0.1 to 10% by weight of a light-diffusing powder and 2 to 14.5% by weight of a primary anti-blue light powder, uniformly mixed by a mixer, and heated to a certain temperature to be melted into a semi-solid state a melt in the form of a liquid or a liquid; (2) a cooling and solidifying step S2: after drawing a semi-solid or liquid melt, it is cooled to a curing temperature by water cooling or air cooling, such as a blower. Curing and drying into a strip; (3) Granulation processing step S3: The strip body is sheared by a pelletizer, and it is precisely cut into a desired particle size length, that is, the manufacture of the plastic masterbatch is completed.

The plastic masterbatch of the present invention can be further subjected to injection molding, extrusion or extrusion molding technology and Pultrusion molding (not shown). Formed into a plastic product that directly diffuses light and absorbs and blocks blue light or contains ultraviolet light, such as lighting fixtures, such as lampshades and bulbs, lighting masks for construction, electronic products, and Eyeglass lenses, etc.

It can be seen from the above that the plastic masterbatch referred to in the present invention mainly uses a plastic powder as a main raw material, uniformly mixes the light-diffusing powder and the anti-blue-ray powder, heats them to be melted, and then cools and solidifies them. Thereafter, the pelletizing operation is carried out; accordingly, the present invention can be implemented to provide a plastic masterbatch which can be processed and formed into a plastic product directly having a uniform diffusion of light and absorbing and blocking blue light, and The purpose of the method for producing a plastic masterbatch is described.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; any changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention All should be covered by the patent of the present invention.

10‧‧‧Plastic masterbatch

101‧‧‧Plastic powder

102‧‧‧Light diffusing powder

103‧‧‧Anti-blue light powder

Claims (10)

A plastic masterbatch for processing into a finished product of light diffusing, absorbing and blocking blue light, which is composed of a plastic powder, a light diffusing powder and an anti-blue light powder, wherein the plastic powder The body is a thermoplastic polymer, and the light-diffusing powder is a fluorene resin having a methyl group as a side chain, and the anti-blue light powder is a yellow toner. The plastic masterbatch according to claim 1, wherein the plastic powder is a polycarbonate (Polycarbonate), a polyethylene terephthalate, a polystyrene (Polystyrene). Or one of polymethylmethacrylate. The plastic masterbatch according to claim 1, wherein the yellow toner is any one of color index 11680, color index 11665, color index 21090 or color index 73462 or a mixture thereof. The plastic masterbatch according to claim 1, wherein the plastic masterbatch comprises 85 to 95% by weight of the plastic powder. The plastic masterbatch according to claim 1, wherein the plastic masterbatch comprises 0.1 to 10% by weight of the light-diffusing powder. The plastic masterbatch according to claim 1, wherein the plastic masterbatch comprises 2 to 14.5% by weight of the anti-blue light powder. The plastic masterbatch according to claim 1, wherein the light-diffusing powder has an average particle diameter of 2 to 10 μm. The plastic masterbatch according to claim 1, wherein the anti-blue light powder has an average particle diameter of 3 to 8 μm. The plastic masterbatch of claim 1, wherein the plastic masterbatch The anti-ultraviolet powder can be added, and the anti-ultraviolet powder is an ultraviolet light absorber, and the main component thereof is Phenyl salicylate and 2,4-dihydroxybenzophenone. (2,4-Dihydroxybenzophenone) or any of 2-Hydroxy-4-Methoxybenzophenone. A method for manufacturing a plastic masterbatch comprises the steps of: mixing and melting a raw material: using a plastic powder as a main raw material, adding a light diffusing powder and a blue light resistant powder, uniformly mixing the mixture, and heating Melting into a semi-solid or liquid melt; a cooling solidification step: the semi-solid or liquid melt is subjected to a drawing operation, and then cooled and dried to solidify; a granulation processing step: using all the particles The machine performs a pelletizing operation and is formed into a plastic masterbatch.