CN111704779A - Television shell, preparation method thereof and television - Google Patents
Television shell, preparation method thereof and television Download PDFInfo
- Publication number
- CN111704779A CN111704779A CN201910205322.2A CN201910205322A CN111704779A CN 111704779 A CN111704779 A CN 111704779A CN 201910205322 A CN201910205322 A CN 201910205322A CN 111704779 A CN111704779 A CN 111704779A
- Authority
- CN
- China
- Prior art keywords
- television
- flame retardant
- parts
- extruder
- raw materials
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3477—Six-membered rings
- C08K5/3492—Triazines
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K3/2279—Oxides; Hydroxides of metals of antimony
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/02—Halogenated hydrocarbons
- C08K5/03—Halogenated hydrocarbons aromatic, e.g. C6H5-CH2-Cl
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
- C08K5/523—Esters of phosphoric acids, e.g. of H3PO4 with hydroxyaryl compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The application provides a television shell, a preparation method thereof and a television, wherein the television shell comprises the following raw materials in parts by weight: 80-95 parts of high impact polystyrene, 10-20 parts of flame retardant and 1-3 parts of antioxidant; the flame retardant comprises a main flame retardant and a synergistic flame retardant, wherein the weight ratio of the main flame retardant to the synergistic flame retardant is 1: (5-10), the main flame retardant comprises decabromodiphenylethane, and the synergistic flame retardant comprises brominated triazine. The television shell, the preparation method thereof and the television provided by the application realize that the thickness of the television shell is reduced on the basis of ensuring that the production process and the performance requirements of the television shell are met, and the requirements of the development of the trend of lightness and thinness of the television are met.
Description
Technical Field
The application relates to the technical field of television equipment shells, in particular to a television shell, a preparation method of the television shell and a television.
Background
At present, flat panel televisions are increasingly popular with consumers due to their advantages of thin body, large screen, high definition display, and the like, and are generally used in family rooms and meeting rooms. Meanwhile, with the development of the flat panel television, in order to further promote the development of the lightness and thinness of the body of the flat panel television, the technical personnel in the field pay more and more attention to how to reduce the thickness of the shell of the flat panel television while ensuring the use requirement of the shell of the flat panel television. The thickness of the flat-panel television shell is reduced, the development requirement of lightness and thinness of the flat-panel television body can be met, resources can be saved, and the cost can be reduced. Most of the existing television housings adopt High Impact Polystyrene (HIPS) and other plastics as raw materials, and if the thickness of the flat panel television housing is reduced by 0.2mm, the HIPS and other raw materials are saved by 10%.
At present, most of television housings are processed by injection molding. During the injection molding process, the plastic material is mixed with the cooling material in the television housing mold. During filling, the temperature of the mold is lower than the temperature of the molten plastic, which cools down gradually in the direction of flow. During the cooling process, the plastic fluid of the surface layer is firstly cooled, then the plastic fluid of the core part is cooled, and the thickness of the cooled surface layer plastic flow is increased and the thickness of the plastic fluid of the core part is gradually reduced along with the increase of the flow length. The molten plastic is gradually solidified in the flowing direction, the thickness of the molten plastic is gradually increased, the flowing channel is narrower and narrower until the molten plastic completely disappears, and then the injection molding is finished.
However, in the process of thinning the television shell, the flowability of plastic raw materials such as HIPS (high impact polystyrene) is a constant value, namely, the flow length ratio (flow length/wall thickness) is a constant value, and when the thickness of the television shell is reduced, the flow length of the plastic such as HIPS in the injection molding process is reduced, so that incomplete filling of a mold of the television shell is caused, and the injection molding of the television shell is restricted. Moreover, because the thicknesses of the various parts of the television shell are different, the thicknesses of the various parts of the corresponding mold are different, so that the heat dissipation of the various parts of the mold is inconsistent in the injection molding process, the cooling and heat dissipation of the various parts of the television shell are inconsistent, the temperature difference is generated among the various parts of the television shell, the temperature stress is generated, and the defects of poor appearance, warping deformation and the like such as delay lines and the like of the injection molded television shell are caused.
Disclosure of Invention
The application provides a television shell, a preparation method thereof and a television, which can reduce the thickness of the television shell on the basis of meeting the production process and performance requirements of the television shell and meet the requirement of the development of the trend of lightness and thinness of the television.
In a first aspect, the present application provides a television housing, comprising, in parts by weight: 80-95 parts of high impact polystyrene, 10-20 parts of flame retardant and 1-3 parts of antioxidant; wherein the content of the first and second substances,
the flame retardant comprises a main flame retardant and a synergistic flame retardant, wherein the weight ratio of the main flame retardant to the synergistic flame retardant is 1: (5-10), the main flame retardant comprises decabromodiphenylethane, and the synergistic flame retardant comprises brominated triazine.
In a second aspect, the present application provides a method of making a television housing, the method comprising: taking any one of the raw materials in proportion;
adding the uniformly mixed raw materials into a hopper of an extruder, and carrying out melt granulation on the raw materials through the extruder to obtain the HIPS composite material;
and preparing the television shell from the HIPS composite material through injection molding.
In a third aspect, the present application further provides a television set, including a television housing; wherein the television shell is any one of the television shells; or the television shell is prepared by the television shell preparation method.
In the television shell, the preparation method thereof and the television, the raw materials of the television shell adopt high impact polystyrene mixed flame retardant and antioxidant, wherein the flame retardant comprises main flame retardant decabromodiphenylethane and synergistic flame retardant bromotriazine. Decabromodiphenylethane and bromotriazine are good flame retardants, which are beneficial to improving the strength and heat resistance of the television shell and can be combined with an antioxidant to enhance the flame retardant property of the television shell. In addition, in the application, the mutual synergistic effect of decabromodiphenylethane and bromotriazine is beneficial to improving the flexibility of a molecular chain of high-impact polystyrene at high temperature, improving the flow length ratio of a plastic raw material of the television shell in a molten state, being convenient to solve the defects of poor appearance, warping deformation and the like caused by reducing the thickness of the television shell in the prior art, and avoiding the adverse effect on the appearance and the service performance of the television shell caused by reducing the thickness of the television. Therefore, the television shell, the preparation method thereof and the television provided by the application can reduce the thickness of the television shell on the basis of ensuring that the production process and performance requirements of the television shell are met, and are suitable for the development of the trend of lightness and thinness of the television.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
FIG. 1 is a schematic representation of the molecular structure of decabromodiphenylethane in the examples of this application;
FIG. 2 is a schematic representation of the molecular structure of bromotriazine in an example of the present application;
FIG. 3 is a schematic representation of the intermolecular resistance of the bromine atoms in decabromodiphenylethane in the examples of this application;
FIG. 4 is a flow chart of a method of making a television housing;
FIG. 5 is a schematic diagram comparing the mold flow analysis of example 8 of the present application with that of comparative example 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the application provides a television shell, which comprises the following raw materials in parts by weight: 80-95 parts of HIPS (high impact polystyrene), 10-20 parts of flame retardant and 1-3 parts of antioxidant; wherein the content of the first and second substances,
the flame retardant comprises a main flame retardant and a synergistic flame retardant, wherein the weight ratio of the main flame retardant to the synergistic flame retardant is 1: (5-10), the main flame retardant comprises decabromodiphenylethane, and the synergistic flame retardant comprises brominated triazine.
In the examples of the present application, HIPS is mainly prepared by a graft copolymerization method, and a main chain is a block copolymer formed by two monomers of butadiene and styrene. Compared with common polystyrene, HIPS has greatly improved impact toughness, improved solvent resistance, good processability and high strength and heat resistance. However, when the thickness of the television shell is further reduced, the movement capability of the HIPS molecular chain is reduced due to the lower temperature of the cavity side of the die, and the deviation occurs in the movement of the cavity side molecular chain and the core side molecular chain, so that the appearance delay mark is generated on the television shell. In addition, as the size of the television shell is larger and larger, the number of the gates is relatively increased in the injection molding process, the number of the welding lines formed between the two material flows is increased, the appearance delay marks generated on the television shell are increased, and the rear shell is easy to warp and deform after being demoulded. In order to meet the requirement of HIPS for the thin-walled development trend of television housings, the flexibility of molecular chains in the HIPS needs to be further improved, namely the melt index or the fluidity of the HIPS is improved, and the influence of the cavity side temperature on the appearance and the internal stress of the thin-walled television housings is weakened.
In the embodiment of the application, the flame retardant comprises a main flame retardant and a synergistic flame retardant, on one hand, the main flame retardant and the synergistic flame retardant are combined with an antioxidant to improve the flame retardant property of HIPS (high impact polystyrene), so that the HIPS has good heat resistance and flame retardant property even if the wall thickness of the television shell is reduced, and the use requirement of the television shell is met; on the other hand, the main flame retardant and the synergistic flame retardant are mutually synergistic to improve the flexibility of the HIPS molecular chain, weaken the influence of the cavity side temperature on the appearance and the internal stress of the thin-walled television shell and reduce the defects of poor appearance, warping deformation and the like generated after the wall thickness of the television shell is reduced.
Specifically, the main flame retardant comprises decabromodiphenylethane, and the synergistic flame retardant comprises bromotriazine. Decabromodiphenylethane is white powder, the water content is lower than 0.1%, the total bromine content is more than or equal to 82.3%, the free bromine content is less than or equal to 20ppm, and the melting point is more than 345 ℃, so that the decabromodiphenylethane flame retardant is a broad-spectrum additive flame retardant with a wide application range. The decabromodiphenylethane molecular structure is a symmetrical structure, as shown in figure 1, and has no obvious weak or easily-broken chemical bond, so that the decabromodiphenylethane molecular structure is relatively stable. The molecular weight of the brominated triazine is 1047.63, the molecular structure is shown in figure 2, the brominated triazine has good thermal stability, electrical performance and excellent light resistance, the brominated triazine has active ether bond, is easy to break, the initial decomposition temperature is high, and meanwhile, the brominated triazine does not contain free bromine because the flame retardant mechanism removes the endothermic decomposition heat degradation. The mutual synergistic effect of the decabromodiphenylethane and the bromotriazine not only ensures the heat resistance and the flame retardant property of the thin-walled television shell, but also improves the flexibility of HIPS molecular chains, weakens the influence of the cavity side temperature on the appearance and the internal stress of the thin-walled television shell, and reduces the defects of poor appearance, warping deformation and the like generated after the wall thickness of the television shell is reduced.
Compared with the brominated triazine, the brominated diphenylethane has large intermolecular resistance due to the fact that the bromine atoms are large in size and ten bromine atoms on the periphery of the brominated diphenylethane have large steric hindrance, and is shown in figure 3. It is known that compared with bromotriazine, the addition of decabromodiphenylethane flame retardant can reduce the fluidity of the plastic matrix to a certain extent and reduce the impact strength of the material, so that the dosage of decabromodiphenylethane is required to be strictly controlled on the basis of meeting the flame retardant performance of a thin-walled television shell. In the examples of the present application, the weight ratio of the main flame retardant to the synergistic flame retardant is 1: (5-10).
When the wall thickness of the television shell is reduced, the structural rigidity, the flame retardance and the heat resistance of the corresponding television shell are reduced, so that the flame retardance, the heat resistance and other properties of the material body are required to be improved in order to ensure that various performance indexes of the thin-wall television shell meet the use requirement. In the embodiment of the application, the antioxidant is beneficial to improving the performances of flame retardance, heat resistance and the like of HIPS, and the performance of the thin-wall television shell is ensured.
In the examples herein, antioxidants are a class of chemicals that, when present in only small amounts in a polymer system, retard or inhibit the progress of the polymer oxidation process, thereby retarding the aging of the polymer and extending its useful life. Specifically, the antioxidant comprises one or more of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] pentaerythritol ester (antioxidant 1010), n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate (antioxidant 1076) or tris [2, 4-di-tert-butylphenyl ] phosphite (antioxidant 168).
In an embodiment of the present application, the primary flame retardant further comprises bisphenol a-bis (diphenyl phosphate). The bisphenol A-bis (diphenyl phosphate) (BDP) is a novel phosphorus flame retardant, is colorless or light yellow transparent liquid, has the relative density of 1.26(20 ℃), the phosphorus content of 8.9 percent, the toxicity LD50 of 5000mg/Kg and the viscosity of 17000mPa.s (25 ℃), and belongs to a halogen-free, low-smoke and low-toxicity environment-friendly flame retardant. During the combustion of bisphenol A-bis (diphenyl phosphate), sheet phosphoric acid is produced to form stable polymer, which promotes the dehydration and carbonization of combustible matter to prevent or reduce the concentration of combustible gas, and during pyrolysis, metaphosphoric acid forms glass-like molten matter to isolate oxygen and thus reach fire retarding effect. And the bisphenol A-bis (diphenyl phosphate) can have good compatibility with HIPS, so that the flame retardant property can be effectively improved in the flame retardant modification process of the HIPS plastic, the physical and mechanical properties of the modified material cannot be greatly influenced, the halogen-free flame retardant HIPS plastic modified material with good tensile strength, bending strength, impact strength, heat deformation temperature resistance and other properties is obtained, and the television shell prepared by the modified material has strong impact resistance and long service life.
In embodiments of the present application, the synergistic flame retardant further comprises antimony trioxide. Antimony trioxide is a synergistic flame retardant with excellent performance, can extinguish flame under the combined action of the antimony trioxide and halogen flame-retardant substances in a gas state, and has the advantages of stable performance, strong universality, no toxicity, smoke suppression and low cost.
In the embodiment of the application, in order to ensure that the flame retardant property of the television shell is improved to a V1 level or higher and the comprehensive performance of notched impact strength is more than 75, the adding amount of the flame retardant and the adding amount of the antioxidant are controlled according to the adding amount of the flame retardant, and the weight ratio of the flame retardant to the antioxidant is controlled within the range of (6.5-10): 1.
In the embodiment of the application, the raw materials of the television shell also comprise a smoke suppressor, and the smoke suppressor is 1-2 parts. The smoke suppressor can quickly dehydrate and carbonize the material in the combustion process to achieve the ultimate aim of smoke elimination. Optionally, in the specific embodiment of the present application, the smoke suppressor is a metal oxide smoke suppressor. Specifically, the metal oxide smoke suppressor comprises Fe2O3、MoO3CuO or Bi2O3One or more mixtures thereof. The particles of the metal oxide smoke suppressor are in a nanometer level, and when the metal oxide smoke suppressor is dispersed into the HIPS, the smoke suppression of the raw materials of the television shell is carried out, a large amount of gas generated by discharging materials in the production process is reduced, the environmental protection performance in the production process of the television shell is improved, the dispersibility of the HIPS is also convenient to improve, and the flexibility of molecular chains in the HIPS is improved to a certain extent.
Further, in the embodiment of the application, the raw material of the television shell further comprises a lubricant, wherein 1-3 parts of the lubricant comprises one or more of calcium stearate, silicone, paraffin, polyethylene wax or zinc stearate. The lubricant improves the fluidity of the HIPS in a molten state to a certain extent, and can form a lubricating layer on the surface between the television shell and the injection mold, so that the friction or the scratch between the television shell and the injection mold is reduced. The lubricant is also beneficial to uniformly disperse the flame retardant, the antioxidant and the smoke suppressor in the HIPS.
The television shell provided by the embodiment of the application adopts HIPS mixed flame retardant and antioxidant as raw materials, wherein the flame retardant comprises a main flame retardant decabromodiphenylethane and a synergistic flame retardant bromotriazine. Decabromodiphenylethane and bromotriazine are good flame retardants, which are beneficial to improving the strength and heat resistance of the television shell and can be combined with an antioxidant to enhance the flame retardant property of the television shell. In the embodiment of the application, the mutual synergistic effect of the decabromodiphenylethane and the bromotriazine is beneficial to improving the flexibility of a molecular chain of HIPS (high impact polystyrene) at a high temperature, improving the flow length ratio of a plastic raw material of the video shell in a molten state, facilitating the solving of the defects of poor appearance, warping deformation and the like caused by the reduction of the thickness of the television shell in the prior art, and avoiding the adverse effect on the appearance and the service performance of the television shell caused by the reduction of the thickness of the television. Therefore, the television shell provided by the embodiment of the application can reduce the thickness of the television shell on the basis of ensuring that the production process and performance requirements of the television shell are met, and is suitable for the development requirement of the trend of lightness and thinness of the television.
Fig. 4 is a flowchart of a method for manufacturing a television housing according to an embodiment of the present application. As shown in fig. 4, a method for manufacturing a television housing according to an embodiment of the present application includes:
s101: taking the raw materials according to the raw material ratio.
According to the raw material proportion in the television shell provided by the embodiment, the raw materials are taken and uniformly mixed. Optionally, the HIPS and the lubricant are put into a high-speed mixer and are uniformly stirred, and then the flame retardant, the antioxidant and the metal oxide smoke suppressor are sequentially added and are uniformly stirred.
S102: and adding the uniformly mixed raw materials into a hopper of an extruder, and carrying out melt granulation on the raw materials through the extruder to obtain the HIPS composite material.
After the raw materials are uniformly mixed, the uniformly mixed raw materials are conveyed into a hopper of an extruder, and the raw materials are subjected to melting granulation through the extruder to obtain the HIPS composite material.
Specifically, the material that will mix evenly is transmitted to twin-screw extruder's loading hopper in, opens twin-screw extruder, and the front portion, middle part, rear portion and the aircraft nose temperature of control feed cylinder are respectively: 165-170 ℃, 180-190 ℃, 195-205 ℃ and 210-230 ℃, wherein the rotation speed of the head screw is controlled at 230rpm/min under 200-230 rpm; and (3) carrying out water cooling, grain cutting, sieving and drying on the molten material extruded by the double-screw extruder to obtain the HIPS composite material. Therefore, the flame retardant is prevented from being decomposed in the manufactured HIPS composite material, and the performance of each raw material component in the HIPS composite material is ensured.
S103: and preparing the television shell from the HIPS composite material through injection molding.
And processing the television shell by injection molding. Specifically, the HIPS composite material prepared in the steps is dyed according to the color requirement of the television shell, then is added into a hopper of an injection molding machine, and is heated to a molten state by the injection molding machine for injection molding production of the television shell, wherein the injection molding temperature is controlled within the range of 200-.
The television shell obtained by processing in the embodiment of the application has stable shrinkage and no defects of poor appearance, warping deformation and the like.
Based on the television shell provided by the embodiment of the application, the embodiment of the application also provides a television, and the television comprises a television shell; the television shell is the television shell of the embodiment; or the television shell is prepared by the preparation method of the television shell in the embodiment.
The present application is further illustrated by the following specific examples, which are intended to be illustrative of the present application and are not intended to limit the scope of the present application.
Example 1
A television shell is prepared by taking raw materials according to the weight proportion of 85 parts of HIPS, 18.5 parts of flame retardant (1.5 parts of decabromodiphenylethane and 17 parts of bromotriazine) and 1 part of antioxidant (1010), and fully and uniformly mixing; adding the uniformly mixed raw materials into a hopper of an extruder, carrying out melt granulation on the raw materials through the extruder to obtain an HIPS composite material, and controlling the temperatures of the front part, the middle part, the rear part and a machine head of a charging barrel of the extruder to be 165 ℃, 185 ℃, 195 ℃ and 210 ℃ respectively; and preparing the television shell from the HIPS composite material through injection molding. The prepared television shell has no defects of hysteresis grain, warping deformation and the like, and generates little smoke in the production and manufacturing process.
Example 2
A television shell is prepared by taking raw materials according to the weight ratio of 85 parts of HIPS, 19 parts of flame retardant (1.5 parts of decabromodiphenylethane, 15 parts of bromotriazine, 0.8 part of antimony trioxide), 2.5 parts of antioxidant (antioxidant 1010) and 1 part of lubricant, and fully and uniformly mixing; adding the uniformly mixed raw materials into a hopper of an extruder, carrying out melt granulation on the raw materials through the extruder to obtain an HIPS composite material, and controlling the temperatures of the front part, the middle part, the rear part and a machine head of a charging barrel of the extruder to be 168 ℃, 180 ℃, 195 ℃ and 220 ℃ respectively; and preparing the television shell from the HIPS composite material through injection molding. The prepared television shell has no defects of hysteresis grain, warping deformation and the like, and generates little smoke in the production and manufacturing process.
Example 3
A television shell is prepared by taking raw materials according to the weight proportion of 95 parts of HIPS, 19 parts of flame retardant (1.5 parts of decabromodiphenylethane, 0.5 part of bisphenol A-bis (diphenyl phosphate), 16 parts of bromotriazine, 1 part of antimony trioxide), 2 parts of antioxidant (antioxidant 1076) and 1 part of metal oxide smoke suppressor, and fully and uniformly mixing; adding the uniformly mixed raw materials into a hopper of an extruder, carrying out melt granulation on the raw materials through the extruder to obtain an HIPS composite material, and controlling the temperatures of the front part, the middle part, the rear part and a machine head of a charging barrel of the extruder to be 170 ℃, 190 ℃, 200 ℃ and 230 ℃ respectively; and preparing the television shell from the HIPS composite material through injection molding. The prepared television shell has no defects of hysteresis grain, warping deformation and the like, and generates little smoke in the production and manufacturing process.
Example 4
A television shell is prepared by taking 90 parts of HIPS (high impact polystyrene), 20 parts of flame retardant (1.5 parts of decabromodiphenylethane, 1 part of bisphenol A-bis (diphenyl phosphate), 16 parts of bromotriazine, 1.5 parts of antimony trioxide), 1.5 parts of antioxidant (antioxidant 1076), 1.5 parts of metal oxide smoke suppressor and 2 parts of lubricant in parts by weight, and fully and uniformly mixing; adding the uniformly mixed raw materials into a hopper of an extruder, carrying out melt granulation on the raw materials through the extruder to obtain an HIPS composite material, and controlling the temperatures of the front part, the middle part, the rear part and a machine head of a charging barrel of the extruder to be 165 ℃, 185 ℃, 205 ℃ and 215 ℃ respectively; and preparing the television shell from the HIPS composite material through injection molding. The prepared television shell has no defects of hysteresis grain, warping deformation and the like, and generates little smoke in the production and manufacturing process.
Example 5
A television shell is prepared by taking raw materials according to the weight proportion of 85 parts of HIPS, 15 parts of flame retardant (0.5 part of decabromodiphenylethane, 1 part of bisphenol A-bis (diphenyl phosphate), 13 parts of bromotriazine, 0.5 part of antimony trioxide), 1.5 parts of antioxidant (antioxidant 1010, antioxidant 1076 and antioxidant 168), 1 part of metal oxide smoke suppressor and 2.5 parts of lubricant, and fully and uniformly mixing; adding the uniformly mixed raw materials into a hopper of an extruder, carrying out melt granulation on the raw materials through the extruder to obtain the HIPS composite material, controlling the temperatures of the front part, the middle part, the rear part and a machine head of a charging barrel of the extruder to be 165 ℃, 180 ℃, 200 ℃ and 225 ℃, and controlling the rotating speed of a machine head screw of the extruder to be 210 rpm/min; and preparing the television shell from the HIPS composite material through injection molding. The prepared television shell has no defects of hysteresis lines, warping deformation and the like, and almost no smoke is generated in the production and manufacturing process.
Example 6
A television shell is prepared by taking raw materials according to the weight ratio of 95 parts of HIPS, 17 parts of flame retardant (1.5 parts of decabromodiphenylethane, 1 part of bisphenol A-bis (diphenyl phosphate), 14 parts of bromotriazine, 0.5 part of antimony trioxide), 1.5 parts of antioxidant (antioxidant 1076 and antioxidant 168), 2 parts of metal oxide smoke suppressor and 3 parts of lubricant, and fully and uniformly mixing; adding the uniformly mixed raw materials into a hopper of an extruder, carrying out melt granulation on the raw materials through the extruder to obtain the HIPS composite material, controlling the temperatures of the front part, the middle part, the rear part and a machine head of a charging barrel of the extruder to be 165 ℃, 185 ℃, 200 ℃ and 225 ℃, and controlling the rotating speed of a machine head screw of the extruder to be 230 rpm/min; and preparing the television shell from the HIPS composite material through injection molding. The prepared television shell has no defects of hysteresis lines, warping deformation and the like, and almost no smoke is generated in the production and manufacturing process.
Example 7
A television shell is prepared by taking 90 parts of HIPS (high impact polystyrene), 18 parts of flame retardant (2.5 parts of decabromodiphenylethane, 1 part of bisphenol A-bis (diphenyl phosphate), 14 parts of bromotriazine, 0.5 part of antimony trioxide), 1.5 parts of antioxidant (antioxidant 1076 and antioxidant 168), 2 parts of metal oxide smoke suppressor and 3 parts of lubricant according to the weight ratio, and fully and uniformly mixing; adding the uniformly mixed raw materials into a hopper of an extruder, carrying out melt granulation on the raw materials through the extruder to obtain the HIPS composite material, controlling the temperatures of the front part, the middle part, the rear part and a machine head of a charging barrel of the extruder to be 170 ℃, 185 ℃, 200 ℃ and 230 ℃ respectively, and controlling the rotating speed of a machine head screw of the extruder to be 200 rpm/min; and preparing the television shell from the HIPS composite material through injection molding. The prepared television shell has no defects of hysteresis lines, warping deformation and the like, and almost no smoke is generated in the production and manufacturing process.
Example 8
A television shell is prepared by taking 80 parts of HIPS (high impact polystyrene), 18 parts of flame retardant (2 parts of decabromodiphenylethane, 1 part of bisphenol A-bis (diphenyl phosphate), 14 parts of bromotriazine, 1 part of antimony trioxide), 1.5 parts of antioxidant (antioxidant 1076 and antioxidant 168), 2 parts of metal oxide smoke suppressor and 3 parts of lubricant according to the weight ratio, and fully and uniformly mixing the raw materials; adding the uniformly mixed raw materials into a hopper of an extruder, carrying out melt granulation on the raw materials through the extruder to obtain the HIPS composite material, controlling the temperatures of the front part, the middle part, the rear part and a machine head of a charging barrel of the extruder to be 170 ℃, 190 ℃, 200 ℃ and 220 ℃ respectively, and controlling the rotating speed of a machine head screw of the extruder to be 205 rpm/min; and preparing the television shell from the HIPS composite material through injection molding. The prepared television shell has no defects of hysteresis grain, warping deformation and the like, and generates little smoke in the production and manufacturing process.
Comparative example 1
A television shell is prepared by taking 90 parts of HIPS, 15 parts of flame retardant (bisphenol A-bis (diphenyl phosphate)), 2 parts of antioxidant and 2 parts of lubricant according to the weight ratio, and fully and uniformly mixing the raw materials; adding the uniformly mixed raw materials into a hopper of an extruder, carrying out melt granulation on the raw materials through the extruder to obtain the HIPS composite material, controlling the temperatures of the front part, the middle part, the rear part and the machine head of a charging barrel of the extruder to be 165-; and preparing the television shell from the HIPS composite material through injection molding. The prepared television shell has no defects of obvious hysteresis grain, warping deformation and the like, and generates obvious smoke in the production and manufacturing process.
Comparative example 2
A television shell is prepared by taking raw materials according to the weight proportion of 85 parts of HIPS, 22 parts of flame retardant (bisphenol A-bis (diphenyl phosphate)), 2.5 parts of antioxidant, 1 part of metal oxide smoke suppressor and 1 part of lubricant, and fully and uniformly mixing; adding the uniformly mixed raw materials into a hopper of an extruder, carrying out melt granulation on the raw materials through the extruder to obtain the HIPS composite material, controlling the temperatures of the front part, the middle part, the rear part and the machine head of a charging barrel of the extruder to be 165-; and preparing the television shell from the HIPS composite material through injection molding. The prepared television shell has the defects of obvious hysteresis grain, warping deformation and the like, and the smoke generated in the production and manufacturing process is very small.
The television housings obtained in examples 1 to 8 and comparative examples 1 to 2 were subjected to tests for relevant properties such as notched impact strength, and the test results are shown in Table 1.
Table 1:
as can be seen by combining examples 1-8 and Table 1, the television set housing provided in the examples of the present application, by controlling the selection type of flame retardant, its ratio to HIPS and the addition amounts of antioxidant, smoke suppressant and lubricant, when the wall thickness is reduced to a small level, the tensile strength, flexural strength and flexural modulus of the television set housing can meet the requirements for use in television set housings, and the notched impact strength is above 85J/m (greater than 75J/m), the flame retardant rating is V1, the melt flow index is above 6 and the generation of smoke is found to be small or even almost smoke-free by the spline combustion test. It can be seen from the combination of comparative examples 1-2 and table 1 that although the flame retardant is added to improve the flame retardant rating of the television housing, the melt flow index is reduced with the increase of the proportion of the flame retardant, so that the defects of hysteresis marks, warping deformation and the like of the television housing occur, and the reduction of the wall thickness of the television housing cannot be met. In addition, comparative example 2 and example 8 of the present application were subjected to mold flow analysis, and when 4.532s was filled, the case was completely filled in example 8 of the present application, and comparative example 2 was not filled to the edge due to poor fluidity, as shown in fig. 5.
Therefore, the television shell provided by the embodiment of the application has no defects of hysteresis marks, buckling deformation and the like, has good and stable performance after the wall thickness is reduced, can reduce the thickness of the television shell on the basis of meeting the production process and performance requirements of the television shell, and is suitable for the development requirement of the trend of lightness and thinness of the television.
All the embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments, and the relevant points may be referred to the part of the description of the method embodiment. It is noted that other embodiments of the present invention will become readily apparent to those skilled in the art from consideration of the specification and practice of the invention herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A television shell is characterized by comprising the following raw materials in parts by weight: 80-95 parts of high impact polystyrene, 10-20 parts of flame retardant and 1-3 parts of antioxidant; wherein the content of the first and second substances,
the flame retardant comprises a main flame retardant and a synergistic flame retardant, wherein the weight ratio of the main flame retardant to the synergistic flame retardant is 1: (5-10), the main flame retardant comprises decabromodiphenylethane, and the synergistic flame retardant comprises brominated triazine.
2. The television housing of claim 1, wherein the primary flame retardant further comprises bisphenol a-bis (diphenyl phosphate) and the synergistic flame retardant further comprises antimony trioxide.
3. The television housing of claim 1, wherein the antioxidant comprises one or more of tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] pentaerythritol ester, n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ester, or tris [ 2.4-di-tert-butylphenyl ] phosphite.
4. The television housing of claim 1, wherein the weight ratio of the flame retardant to the antioxidant is (6.5-10): 1.
5. The television housing of claim 1, wherein the raw materials further comprise: 1-2 parts of metal oxide smoke suppressor, wherein the metal oxide smoke suppressor comprises Fe2O3、MoO3CuO or Bi2O3One or more mixtures thereof.
6. The television housing of claim 1, wherein the raw materials further comprise: 1-3 parts of lubricant, wherein the lubricant comprises one or more of calcium stearate, silicone, paraffin wax, polyethylene wax or zinc stearate.
7. A method of making a television housing, the method comprising: proportioning raw materials according to any one of claims 1-6;
adding the uniformly mixed raw materials into a hopper of an extruder, and carrying out melt granulation on the raw materials through the extruder to obtain the HIPS composite material;
and preparing the television shell from the HIPS composite material through injection molding.
8. The method of making a television housing according to claim 7, wherein melt pelletizing the feedstock through an extruder comprises:
the temperatures of the front part, the middle part, the rear part and the machine head of the charging barrel of the extruder are respectively controlled as follows: 165-170 ℃, 180-190 ℃, 195-205 ℃ and 210-230 ℃;
and (3) carrying out water cooling, grain cutting, sieving and drying on the molten material extruded by the extruder in sequence.
9. The method for preparing a television receiver enclosure according to claim 7, wherein the extruder is a twin-screw extruder, and the head screw rotation speed of the extruder is controlled at 200-230 rpm/min.
10. A television, wherein the television comprises a television housing; wherein the television housing is the television housing of any one of claims 1-6; or, the television housing is prepared by the method for preparing the television housing according to any one of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910205322.2A CN111704779A (en) | 2019-03-18 | 2019-03-18 | Television shell, preparation method thereof and television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910205322.2A CN111704779A (en) | 2019-03-18 | 2019-03-18 | Television shell, preparation method thereof and television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111704779A true CN111704779A (en) | 2020-09-25 |
Family
ID=72536515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910205322.2A Pending CN111704779A (en) | 2019-03-18 | 2019-03-18 | Television shell, preparation method thereof and television |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111704779A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5387636A (en) * | 1991-08-14 | 1995-02-07 | Albemarle Corporation | Flame-retarded hips formulations with enhanced impact strength |
| CN101353463A (en) * | 2007-07-24 | 2009-01-28 | 上海金发科技发展有限公司 | Flame-retardant polystyrene resin complex containing brominated triazine and preparation thereof |
| CN104893223A (en) * | 2015-06-18 | 2015-09-09 | 青岛海信电器股份有限公司 | Electronic equipment casing material and preparation method thereof |
| CN105295281A (en) * | 2015-12-04 | 2016-02-03 | 青岛海信电器股份有限公司 | Shell material of electronic equipment and preparation method thereof |
| CN105820487A (en) * | 2016-04-07 | 2016-08-03 | 青岛海信电器股份有限公司 | Composite material used for casing of audio and video equipment as well as preparation method, and audio and video equipment |
| CN106189034A (en) * | 2016-08-29 | 2016-12-07 | 合肥会通新材料有限公司 | One is applicable to thin-gage goods without the highly anti-flush polyphenylacetylene composition and preparation method thereof that glows |
| CN106380770A (en) * | 2016-08-26 | 2017-02-08 | 青岛海尔新材料研发有限公司 | Flame-retardant styrene resin composition and preparation method thereof |
| CN109135085A (en) * | 2018-07-27 | 2019-01-04 | 武汉金发科技有限公司 | A kind of environmental protection flame retardant poly styrene composite material and preparation method thereof |
-
2019
- 2019-03-18 CN CN201910205322.2A patent/CN111704779A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5387636A (en) * | 1991-08-14 | 1995-02-07 | Albemarle Corporation | Flame-retarded hips formulations with enhanced impact strength |
| CN101353463A (en) * | 2007-07-24 | 2009-01-28 | 上海金发科技发展有限公司 | Flame-retardant polystyrene resin complex containing brominated triazine and preparation thereof |
| CN104893223A (en) * | 2015-06-18 | 2015-09-09 | 青岛海信电器股份有限公司 | Electronic equipment casing material and preparation method thereof |
| CN105295281A (en) * | 2015-12-04 | 2016-02-03 | 青岛海信电器股份有限公司 | Shell material of electronic equipment and preparation method thereof |
| CN105820487A (en) * | 2016-04-07 | 2016-08-03 | 青岛海信电器股份有限公司 | Composite material used for casing of audio and video equipment as well as preparation method, and audio and video equipment |
| CN106380770A (en) * | 2016-08-26 | 2017-02-08 | 青岛海尔新材料研发有限公司 | Flame-retardant styrene resin composition and preparation method thereof |
| CN106189034A (en) * | 2016-08-29 | 2016-12-07 | 合肥会通新材料有限公司 | One is applicable to thin-gage goods without the highly anti-flush polyphenylacetylene composition and preparation method thereof that glows |
| CN109135085A (en) * | 2018-07-27 | 2019-01-04 | 武汉金发科技有限公司 | A kind of environmental protection flame retardant poly styrene composite material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103102669B (en) | Thermal-resistant light-smoke halogen-free flame-retardant PC/ABS alloy material and preparation method thereof | |
| CN101805508B (en) | Halogen-free fire-retardant polyphenyl ether composition capable of improving low-temperature toughness and preparation method thereof | |
| CN108117735B (en) | High-performance halogen-free flame-retardant polycarbonate material and preparation method thereof | |
| CN102558852A (en) | Low-cost flame-retardant glass fiber reinforced polyamide 6 (PA6) engineering plastic and preparation method thereof | |
| CN102079857A (en) | Halogen-free flame-retardant polycarbonate (PC) composition and preparation method thereof | |
| CN109705462A (en) | A kind of dedicated V0 grade halogen-free flame-retardant polypropylene material of extrusion plastic uptake and preparation method thereof | |
| CN103571187A (en) | Preparation technology of high-performance environmentally-friendly flame-retardant reinforced PA66 composite material | |
| CN101899192A (en) | Low-smoke fireproof polyvinyl chloride/acrylonitrile butadiene styrene (PVC/ABS) alloy and preparation method thereof | |
| CN105061887A (en) | Halogen-free flame-retardant polypropylene material and preparation method thereof | |
| CN104893223A (en) | Electronic equipment casing material and preparation method thereof | |
| CN108676331A (en) | A kind of high-strength high temperature-resistant PBT/PC alloy resin materials and preparation method thereof | |
| CN106751808A (en) | A kind of fire-retardant non-reinforcing PA66 composites of GWIT high CTI high | |
| CN109280299B (en) | Low-smoke low-halogen PVC (polyvinyl chloride) granules and preparation method thereof | |
| CN101003666A (en) | Super high flowing, white, fire retardant PBT with no halogen, in high thermal stability, and preparation method | |
| CN105273298A (en) | High-gloss anti-precipitation flame-retardant polypropylene material and preparation method thereof | |
| CN107266786A (en) | A kind of polypropylene halogen-free flame-retardant master batch and preparation method thereof | |
| CN101864137B (en) | High impact-resistance anti-smoldering polystyrene resin composite and preparation method thereof | |
| CN111704779A (en) | Television shell, preparation method thereof and television | |
| CN103242655A (en) | Halogen-free flame retardant PA (Polyamide) 66 plastic modified material and preparation method thereof | |
| CN103131147A (en) | High heat wire inflaming retarding enhancement polybutylece terephthalate (PBT) material and manufacturing method thereof | |
| CN112300480B (en) | Ceramic polyolefin and preparation method thereof | |
| CN106366616B (en) | A kind of MPPO composites and preparation method thereof | |
| CN104725760A (en) | Halogen-free flame-retardant ABS material and preparation method thereof | |
| CN101942174B (en) | Halogen-free flame-retardant ABS/PA6 alloy material and preparation method thereof | |
| CN103146059A (en) | Polypropylene modified halogen-free flame retardant composite material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |