CN115071235A - Light-transmission-proof anti-aging sheet for styrene lampshade and manufacturing process thereof - Google Patents
Light-transmission-proof anti-aging sheet for styrene lampshade and manufacturing process thereof Download PDFInfo
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- CN115071235A CN115071235A CN202210788213.XA CN202210788213A CN115071235A CN 115071235 A CN115071235 A CN 115071235A CN 202210788213 A CN202210788213 A CN 202210788213A CN 115071235 A CN115071235 A CN 115071235A
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/023—Optical properties
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V3/00—Globes; Bowls; Cover glasses
- F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
- F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
- F21V3/062—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/416—Reflective
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/552—Fatigue strength
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of materials, and provides a light-transmitting and anti-aging sheet for a styrene lampshade, which is light-tight, can increase light without changing the toughness of the lampshade and can improve the oxidation resistance of the upper surface layer and the lower surface layer of the lampshade, and a manufacturing process of the light-transmitting and anti-aging sheet, wherein the light-transmitting and anti-aging sheet comprises an upper substrate sheet layer, a lower substrate sheet layer and a light-condensing layer which is arranged between the upper substrate sheet layer and the lower substrate sheet layer and is used for preventing light from transmitting from the upper substrate sheet layer, the thickness of the upper substrate sheet layer is 35-45% of the total thickness of a composite board, the thickness of the light-condensing layer is 10-30% of the total thickness of the composite board, and the thickness of the lower substrate sheet layer is 35-45% of the total thickness of the composite board; the upper substrate sheet layer and the lower substrate sheet layer are prepared from the following raw materials in parts by weight: 85-97 parts of polystyrene blend (HIPS), 2-6 parts of toughening agent, 2-6 parts of white masterbatch and 1-4 parts of antioxidant; the light-gathering layer is prepared from the following raw materials in parts by weight: 85-98 parts of polystyrene blend (HIPS) and 2-10 parts of colorant.
Description
Technical Field
The invention relates to the technical field of materials, in particular to a light-transmitting and anti-aging sheet for a styrene lampshade and a manufacturing process thereof.
Background
The LED lamp shade is formed by using a white HIPS sheet through plastic suction molding all the time, and the lamp shade is arranged above the lamp source and used for intensively reflecting light rays emitted by the lamp source. When the white HIPS lampshade is used, 20% -30% of light can leak to the upper part of the lampshade through the lampshade, and the utilization rate of a light source is reduced.
In order not to influence the aesthetic property of the white HIPS lampshade, the light is blocked in the prior art by adding the color master titanium dioxide, and the toughness of the lampshade is influenced after adding excessive color master titanium dioxide, so that the lampshade becomes brittle and fragile.
In order not to influence the performance that changes HIPS lamp shade and solve HIPS lamp shade light leak problem simultaneously, the present case produces from this.
Disclosure of Invention
Therefore, aiming at the problems, the invention provides the light-transmitting and anti-aging sheet for the styrene lampshade and the manufacturing process thereof, wherein the light-transmitting and anti-aging sheet is light-tight, can increase the light without changing the toughness of the lampshade, and can improve the oxidation resistance of the upper surface layer and the lower surface layer of the lampshade.
In order to solve the technical problems, the light-transmitting and anti-aging sheet for the styrene lampshade comprises a white upper substrate sheet layer, a white lower substrate sheet layer and a light-condensing layer arranged between the upper substrate sheet layer and the lower substrate sheet layer and used for preventing light from transmitting from the upper substrate sheet layer, wherein the thickness of the upper substrate sheet layer is 35-45% of the total thickness of the composite board, the thickness of the light-condensing layer is 10-30% of the total thickness of the composite board, and the thickness of the lower substrate sheet layer is 35-45% of the total thickness of the composite board.
The upper substrate sheet layer and the lower substrate sheet layer are prepared from the following raw materials in parts by weight: 85-97 parts of polystyrene blend (HIPS), 2-6 parts of toughening agent, 2-6 parts of white masterbatch and 1-4 parts of antioxidant;
the light-gathering layer is prepared from the following raw materials in parts by weight: 85-98 parts of polystyrene blend (HIPS) and 2-10 parts of colorant.
The further improvement is that: the toughening agent is formed by mixing more than two of styrene copolymer and styrene-maleic anhydride copolymer or styrene copolymer, styrene-maleic anhydride copolymer and maleic anhydride grafted polyethylene (PE-MAH) in any mixing ratio.
The further improvement is that: the antioxidant is one or two of UV-0, UV-9, UV-71, UV-329, UV-326, UV-327, UV-234 and UV-360 in the ultraviolet absorbent in any mixing ratio.
The further improvement is that: the colorant is a pigment with low saturation color or a plastic color master batch with low saturation color.
The further improvement is that: the upper substrate sheet layer is formed by co-extruding one or two substrate sheet layer material layers, and the lower substrate sheet layer is formed by co-extruding one or two substrate sheet layer material layers.
The further improvement is that: the antioxidant is added on the outer layer substrate sheet material layer of the upper substrate sheet layer and the outer layer substrate sheet material layer of the lower substrate sheet layer.
The further improvement is that: the total thickness of the composite board is 200 threads, the thickness of the upper substrate sheet layer and the thickness of the lower substrate sheet layer are 75 threads, and the thickness of the light-gathering layer is 50 threads.
The light-transmitting and ageing resistant sheet for styrene lamp shade and its making process includes the following steps:
(1) adding the polystyrene blend (HIPS), the flexibilizer, the antioxidant and the white master in the base material sheet layer into a high-speed mixer, and uniformly mixing;
(2) adding the polystyrene blend (HIPS) and the colorant which are raw materials in the light-gathering layer into a high-speed mixer, and uniformly mixing;
(3) adding the uniformly mixed substrate sheet material into two auxiliary screws of a three-screw extruder, and melting and jointly extruding the substrate sheet material into a co-extrusion die runner at the temperature of 160-180 ℃; adding the uniformly mixed light-gathering layer material into a main screw of a three-screw extruder, and melting and extruding the material into a co-extrusion die runner at the temperature of 160-180 ℃; the melted base material sheet layer material and the condensed light layer material are converged in a three-layer co-extrusion die, the base material sheet layer is compounded on the upper surface and the lower surface of the condensed light layer through a die head distributor to form an upper base material sheet layer and a lower base material sheet layer, and the compounded and extruded three-layer sheet material is conveyed to a three-roller calender for tabletting, cooling and shaping and then is continuously output;
(4) and the cooled and shaped composite sheet is guided to a winding shaft at the rear part through the traction and conduction of a guide roller, is wound into a bundle by the winding shaft, and is stored in a warehouse.
The further improvement is that: the upper substrate sheet layer and the lower substrate sheet layer can also be formed by co-extruding two layers of substrate sheet materials;
adding the polystyrene blend (HIPS), the toughening agent, the white masterbatch and the antioxidant which are raw materials in the substrate sheet layer into a high-speed mixer, and uniformly mixing;
adding the polystyrene blend (HIPS), the flexibilizer and the white masterbatch which are raw materials in the substrate sheet layer into a high-speed mixer, and uniformly mixing;
the base material sheet in the first auxiliary screw of the three-screw extruder is extruded to a first flow channel and a fifth flow channel in a five-layer co-extrusion die through a flow divider, the base material sheet of the second auxiliary screw of the three-screw extruder is extruded to a second flow channel and a fourth flow channel in the five-layer co-extrusion die through the flow divider, and the five-layer sheet which is compositely extruded is conveyed to a three-roller calender for tabletting, cooling and shaping and then continuously output.
The further improvement is that: melting and extruding the substrate sheet material in an auxiliary screw of a three-screw extruder at the temperature of 160-180 ℃ and the rotating speed of 70-80 r/min; and adding the light-gathering layer material into a main screw of a three-screw extruder, and performing melt extrusion at the temperature of 160-180 ℃ and the rotating speed of 40-60 r/min.
By adopting the technical scheme, the invention has the beneficial effects that: the invention has the following advantages:
1. when the traditional white HIPS lampshade reflects light, 20% -30% of light can penetrate through the lampshade to leak light, the reflectivity of the light is reduced, and the light penetrating through the lampshade can accelerate the aging of the lampshade. The lampshade made of the composite material does not change the color of the inner surface and the outer surface of the surface cover of the lampshade, the attractiveness of the lampshade is not affected, and the light-gathering layer arranged on the inner layer of the lampshade gathers light penetrating through the lower base material sheet layer to increase the reflectivity of the lower base material sheet layer.
2. The upper substrate sheet layer, the light-gathering layer and the lower substrate sheet layer are all made of polystyrene blend (HIPS) as main materials, and the layers can be well fused with one another.
3. The light-gathering layer is subjected to color mixing through black color master batches, light gathering is achieved, material performance is not changed, and the degree of fusion between layers is not affected.
4. The upper substrate sheet layer and the lower substrate sheet layer can also be of a double-layer co-extrusion composite structure, the antioxidant can be added into the outer sides of the upper substrate sheet layer and the lower substrate sheet layer exposed in the air during double-layer co-extrusion, aging and oxidation occur from outside to inside, and the anti-aging material is added into the outer layer, so that the anti-aging performance of the outer layer can be improved without increasing the using amount of the antioxidant, and the integral anti-oxidation performance of the lampshade can be improved.
Detailed Description
The invention will now be further illustrated with reference to specific examples.
Example one
The embodiment of the invention provides a light-transmitting and anti-aging sheet for a styrene lampshade and a manufacturing process thereof.
The styrene-ethylene lamp shade is with preventing light ageing resistance slab that passes through, including white last substrate lamella, white lower substrate lamella, set up in go up the substrate lamella and down be used for preventing the light from the light-gathering layer of last substrate lamella material transmission between the substrate lamella, the thickness of going up the substrate lamella is 35-45% of compound back panel gross thickness, the thickness on light-gathering layer is 10-30% of compound back panel gross thickness, the thickness of lower substrate lamella is 35-45% of compound back panel gross thickness. Preferably: the total thickness of the composite board is 200 threads, the thickness of the upper substrate sheet layer and the thickness of the lower substrate sheet layer are 75 threads, and the thickness of the light-gathering layer is 50 threads.
The upper substrate sheet layer and the lower substrate sheet layer are prepared from the following raw materials in parts by weight: 92 parts of polystyrene blend (HIPS), 4 parts of flexibilizer, 4 parts of white mother and 2 parts of antioxidant;
the light-gathering layer is prepared from the following raw materials in parts by weight: 96 parts of polystyrene blend (HIPS) and 4 parts of colorant. The colorant is a pigment with low saturation color or a plastic color master batch with low saturation color. The low-saturation colorant is a color formed by combining one or more than two of black, blue, gray, green, purple and red in any mixing ratio. The low-saturation colorant is preferably: black plastic color master batch.
The toughening agent is formed by mixing more than two of styrene copolymer and styrene-maleic anhydride copolymer or styrene copolymer, styrene-maleic anhydride copolymer and maleic anhydride grafted polyethylene (PE-MAH) in any mixing ratio. The antioxidant is one or two of UV-0, UV-9, UV-71, UV-329, UV-326, UV-327, UV-234 and UV-360 in the ultraviolet absorbent in any mixing ratio.
A manufacturing process of a light-transmitting-preventing anti-aging sheet for a styrene lampshade comprises the following process steps:
(1) adding the polystyrene blend (HIPS), the flexibilizer, the antioxidant and the white master in the base material sheet layer into a high-speed mixer, and uniformly mixing;
(2) adding the polystyrene blend (HIPS) and the colorant which are raw materials in the light-gathering layer into a high-speed mixer, and uniformly mixing;
(3) adding the uniformly mixed substrate sheet material into two auxiliary screws of a three-screw extruder, and melting and extruding the substrate sheet material into a co-extrusion die runner at 160-180 ℃; adding the uniformly mixed light-gathering layer material into a main screw of a three-screw extruder, and melting and extruding the material into a co-extrusion die runner at the temperature of 160-180 ℃; converging the melted base material sheet layer material and the condensed light layer material in a three-layer co-extrusion die, compounding the base material sheet layer on the upper surface and the lower surface of the condensed light layer through a die head distributor to form an upper base material sheet layer and a lower base material sheet layer, conveying the compounded and extruded three-layer sheet material to a three-roller calender, tabletting, cooling and shaping, and then continuously outputting; the temperature of the first compression roller in the three-roller calender is 60 ℃, the temperature of the second compression roller is 50 ℃, the temperature of the third compression roller is 60 ℃, and the gradually-lowered three-roller temperature is beneficial to outputting and shaping after the composite sheet is rapidly expanded in a casting way, so that the tolerance of the composite sheet is improved, and the composite material is conveniently stripped from the compression rollers after the composite sheet is subjected to casting and sheeting.
Preferably: melting and extruding the substrate sheet material in an auxiliary screw of a three-screw extruder at the temperature of 160-180 ℃ and the rotating speed of 70-80 r/min; and adding the light-gathering layer material into a main screw of a three-screw extruder, and performing melt extrusion at the temperature of 160-180 ℃ and the rotating speed of 40-60 r/min.
(4) And the cooled and shaped composite sheet is guided to a winding shaft at the rear part through the traction and conduction of a guide roller, is wound into a bundle by the winding shaft, and is stored in a warehouse.
Example two
The embodiment of the invention provides a light-transmitting and anti-aging sheet for a styrene lampshade and a manufacturing process thereof.
The styrene-ethylene lampshade is with preventing light anti-aging sheet and preparation technology thereof, including white last substrate lamella, white lower substrate lamella, set up in go up the substrate lamella and be used for preventing the light from the light-gathering layer of last substrate lamella material transmission down between the substrate lamella, it is formed by one deck or two-layer substrate lamella material layer crowded altogether to go up the substrate lamella, the substrate lamella is formed by one deck or two-layer substrate lamella material layer crowded altogether down, the antioxidant addition is on the outer substrate lamella material layer of last substrate lamella and the outer substrate lamella material layer of lower substrate lamella. The thickness of the upper substrate sheet layer is 35-45% of the total thickness of the composite rear plate, the thickness of the light-gathering layer is 10-30% of the total thickness of the composite rear plate, and the thickness of the lower substrate sheet layer is 35-45% of the total thickness of the composite rear plate. Preferably: the total thickness of the composite board is 200 threads, the thickness of the upper substrate sheet layer and the thickness of the lower substrate sheet layer are 75 threads, and the thickness of the light-gathering layer is 50 threads. Wherein, the thickness of the outer layer substrate sheet material layer of the upper substrate sheet layer 1' is 30-70% of the thickness of the upper substrate sheet layer, preferably 30 filaments; the thickness of the outer substrate sheet material layer of the lower substrate sheet 2 "is 30-70% of the thickness of the lower substrate sheet, preferably 30 filaments.
The inner substrate sheet layer material layer of the upper substrate sheet layer and the lower substrate sheet layer is prepared from the following raw materials in parts by weight: 92 parts of polystyrene blend (HIPS), 4 parts of flexibilizer and 4 parts of white mother;
the outer-layer substrate sheet material layer of the upper substrate sheet layer and the lower substrate sheet layer is prepared from the following raw materials in parts by weight: 92 parts of polystyrene blend (HIPS), 4 parts of flexibilizer, 4 parts of white mother and 2 parts of antioxidant;
the light-gathering layer is prepared from the following raw materials in parts by weight: 96 parts of polystyrene blend (HIPS) and 4 parts of black master batch. The colorant is a pigment with low saturation color or a plastic color master batch with low saturation color. The low-saturation colorant is a color formed by combining one or more than two of black, blue, gray, green, purple and red in any mixing ratio. The low-saturation colorant is preferably: black plastic color master batch.
The toughening agent is formed by mixing more than two of styrene copolymer, styrene-maleic anhydride copolymer or styrene copolymer, styrene-maleic anhydride copolymer and maleic anhydride grafted polyethylene (PE-MAH) in any mixing ratio. The antioxidant is one or two of UV-0, UV-9, UV-71, UV-329, UV-326, UV-327, UV-234 and UV-360 in the ultraviolet absorbent in any mixing ratio.
A manufacturing process of a light-transmitting-preventing anti-aging sheet for a styrene lampshade comprises the following process steps:
(1) the upper substrate sheet layer and the lower substrate sheet layer can also be formed by co-extrusion of two substrate sheet layers;
adding the polystyrene blend (HIPS), the toughening agent, the white masterbatch and the antioxidant which are raw materials in the substrate sheet layer into a high-speed mixer, and uniformly mixing;
adding the polystyrene blend (HIPS), the flexibilizer and the white masterbatch which are raw materials in the substrate sheet layer into a high-speed mixer, and uniformly mixing;
(2) adding the polystyrene blend (HIPS) and the colorant in the light-gathering layer into a high-speed mixer, and uniformly mixing;
(3) adding the material of the outer layer in the upper substrate sheet layer and the material of the outer layer in the lower base layer sheet layer into a first auxiliary screw of a three-screw extruder, adding the material of the inner layer in the upper substrate sheet layer and the material of the inner layer in the lower base layer sheet layer into a second auxiliary screw of the three-screw extruder, melting and jointly extruding the material in the first auxiliary screw into a first runner and a fifth runner of a co-extrusion die at the temperature of 160-180 ℃, and melting and jointly extruding the material in the second auxiliary screw into a second runner and a fourth runner of the co-extrusion die at the temperature of 160-180 ℃; adding the light-gathering layer material into a main screw of a three-screw extruder, and melting and extruding the light-gathering layer material into a third flow channel of a co-extrusion die at the temperature of 160-180 ℃; the melted base material sheet layer material and the light gathering layer material are converged in a five-layer co-extrusion die, the base material sheet layer is compounded on the upper surface and the lower surface of the light gathering layer through a die head distributor to form an upper base material sheet layer and a lower base material sheet layer, and the five layers of compounded and extruded sheets are conveyed to a three-roller calender for tabletting, cooling and shaping and then continuously output; the temperature of the first compression roller in the three-roller calender is 60 ℃, the temperature of the second compression roller is 50 ℃, the temperature of the third compression roller is 60 ℃, the temperature of the three rollers is gradually reduced, the composite sheet is output and shaped after being rapidly expanded in a casting way, the tolerance of the composite sheet is improved, and the composite material is conveniently stripped from the compression rollers after being subjected to casting and sheeting.
Preferably: melting and extruding the substrate sheet material in an auxiliary screw of a three-screw extruder at the temperature of 160-180 ℃ and the rotating speed of 70-80 r/min; and adding the light-gathering layer material into a main screw of a three-screw extruder, and performing melt extrusion at the temperature of 160-180 ℃ and the rotating speed of 40-60 r/min.
(4) And the cooled and shaped composite sheet is guided to a winding shaft at the rear part through the traction and conduction of a guide roller, is wound into a bundle by the winding shaft, and is stored in a warehouse.
Based on the technical scheme, the light-gathering layer can also be a metal coating which can prevent light from passing through.
While there have been shown and described what are at present considered to be the fundamental principles of the invention and its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are included to illustrate the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (10)
1. Styrene lamp shade is with preventing passing through light ageing resistance slab, its characterized in that: the composite plate comprises a white upper substrate sheet layer, a white lower substrate sheet layer and a light-gathering layer which is arranged between the upper substrate sheet layer and the lower substrate sheet layer and used for preventing light from being transmitted from the upper substrate sheet layer, wherein the thickness of the upper substrate sheet layer is 35-45% of the total thickness of the composite plate, the thickness of the light-gathering layer is 10-30% of the total thickness of the composite plate, and the thickness of the lower substrate sheet layer is 35-45% of the total thickness of the composite plate;
the upper substrate sheet layer and the lower substrate sheet layer are prepared from the following raw materials in parts by weight: 85-97 parts of polystyrene blend (HIPS), 2-6 parts of toughening agent, 2-6 parts of white masterbatch and 1-4 parts of antioxidant;
the light-gathering layer is prepared from the following raw materials in parts by weight: 85-98 parts of polystyrene blend (HIPS) and 2-10 parts of colorant.
2. The styrene lamp shade of claim 1, wherein the light-transmitting and anti-aging sheet comprises: the toughening agent is formed by mixing more than two of styrene copolymer and styrene-maleic anhydride copolymer or styrene copolymer, styrene-maleic anhydride copolymer and maleic anhydride grafted polyethylene (PE-MAH) in any mixing ratio.
3. The styrene lamp shade of claim 1, wherein the light-transmitting and anti-aging sheet comprises: the antioxidant is one or two of UV-0, UV-9, UV-71, UV-329, UV-326, UV-327, UV-234 and UV-360 in the ultraviolet absorbent in any mixing ratio.
4. The styrene lamp shade of claim 1, wherein the light-transmitting and anti-aging sheet comprises: the colorant is a pigment with low saturation color or a plastic color master batch with low saturation color.
5. The styrene lamp shade of claim 1, wherein the light-transmitting and anti-aging sheet comprises: the upper substrate sheet layer is formed by co-extruding one or two substrate sheet layer material layers, and the lower substrate sheet layer is formed by co-extruding one or two substrate sheet layer material layers.
6. The styrene lamp shade of claim 5 is with preventing passing through light ageing resistant slab, characterized by: the antioxidant is added on the outer layer substrate sheet material layer of the upper substrate sheet layer and the outer layer substrate sheet material layer of the lower substrate sheet layer.
7. The light-transmission-preventing and anti-aging sheet for the styrene lamp cover according to claim 1, 5 or 6, wherein: the total thickness of the composite board is 200 threads, the thickness of the upper substrate sheet layer and the thickness of the lower substrate sheet layer are 75 threads, and the thickness of the light-gathering layer is 50 threads.
8. The manufacturing process of the light-transmitting-preventing anti-aging sheet for the styrene lampshade is characterized by comprising the following steps of: the process comprises the following steps:
(1) adding the polystyrene blend (HIPS), the flexibilizer, the antioxidant and the white master in the base material sheet layer into a high-speed mixer, and uniformly mixing;
(2) adding the polystyrene blend (HIPS) and the colorant which are raw materials in the light-gathering layer into a high-speed mixer, and uniformly mixing;
(3) adding the uniformly mixed substrate sheet material into two auxiliary screws of a three-screw extruder, and melting and jointly extruding the substrate sheet material into a co-extrusion die runner at the temperature of 160-180 ℃; adding the uniformly mixed light-gathering layer material into a main screw of a three-screw extruder, and melting and extruding the material into a co-extrusion die runner at the temperature of 160-180 ℃; converging the melted base material sheet layer material and the condensed light layer material in a three-layer co-extrusion die, compounding the base material sheet layer on the upper surface and the lower surface of the condensed light layer through a die head distributor to form an upper base material sheet layer and a lower base material sheet layer, conveying the compounded and extruded three-layer sheet material to a three-roller calender, tabletting, cooling and shaping, and then continuously outputting;
(4) and the cooled and shaped composite sheet is guided to a winding shaft at the rear part through the traction and conduction of a guide roller, is wound into a bundle by the winding shaft, and is stored in a warehouse.
9. The manufacturing process of the light-transmission-preventing and anti-aging sheet for the styrene lamp shade according to claim 8, is characterized in that: the upper substrate sheet layer and the lower substrate sheet layer can also be formed by co-extruding two layers of substrate sheet materials;
adding the polystyrene blend (HIPS), the toughening agent, the white masterbatch and the antioxidant which are raw materials in the substrate sheet layer into a high-speed mixer, and uniformly mixing;
adding the polystyrene blend (HIPS), the flexibilizer and the white masterbatch which are raw materials in the substrate sheet layer into a high-speed mixer, and uniformly mixing;
and the base material sheet in the first auxiliary screw of the three-screw extruder is extruded into a first flow channel and a fifth flow channel in a five-layer co-extrusion die through a splitter, the base material sheet of the second auxiliary screw of the three-screw extruder is extruded into a second flow channel and a fourth flow channel in the five-layer co-extrusion die through the splitter, and the five layers of sheets which are compositely extruded are conveyed to a three-roller calender for tabletting, cooling and shaping and then are continuously output.
10. The process for manufacturing the light-transmitting and anti-aging sheet for the styrene lamp shade according to claim 8 or 9, which is characterized in that: melting and extruding the substrate sheet material in an auxiliary screw of a three-screw extruder at the temperature of 160-180 ℃ and the rotating speed of 70-80 r/min; and adding the light-gathering layer material into a main screw rod of a three-screw extruder, and performing melt extrusion at the temperature of 160-180 ℃ and the rotating speed of 40-60 r/min.
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| CN202210788213.XA CN115071235A (en) | 2022-07-06 | 2022-07-06 | Light-transmission-proof anti-aging sheet for styrene lampshade and manufacturing process thereof |
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