CN112778608A - Functional color master batch and preparation method thereof - Google Patents

Functional color master batch and preparation method thereof Download PDF

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Publication number
CN112778608A
CN112778608A CN202011626825.6A CN202011626825A CN112778608A CN 112778608 A CN112778608 A CN 112778608A CN 202011626825 A CN202011626825 A CN 202011626825A CN 112778608 A CN112778608 A CN 112778608A
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parts
color master
portions
functional color
master batch
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Chinese (zh)
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胡明发
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Yongkang Caifa Pigment Co ltd
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Yongkang Caifa Pigment Co ltd
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Priority to CN202011626825.6A priority Critical patent/CN112778608A/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/10—Homopolymers or copolymers of propene
    • C08J2423/12—Polypropene
    • 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
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/02—Organic and inorganic ingredients
    • 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
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
    • 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
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • 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
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • 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
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • 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
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • 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
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C08K5/098—Metal salts of carboxylic acids

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

The invention discloses a functional color master batch and a preparation method thereof, wherein the functional color master batch comprises the following components in parts by weight: 500 portions of PE 200; 500 portions of PP 200-; 150 portions and 250 portions of inorganic filler; 100 portions and 200 portions of inorganic pigment; 10-30 parts of metal soap; 30-60 parts of low-molecular wax; and 20-50 parts of an auxiliary agent. Adding the components into stirring equipment, stirring and mixing, carrying out high-temperature treatment, fusion, solidification and bracing treatment on the mixture in a co-rotating parallel double-screw color master machine to obtain plastic water bracing strips, and cutting the plastic water bracing strips into color master batches through a granulator. The color master batch prepared by the invention has the advantages of light aging resistance, deformation resistance, adhesion resistance and flame retardant capability, and has good compatibility with polyethylene resin and polypropylene resin.

Description

Functional color master batch and preparation method thereof
Technical Field
The invention belongs to the technical field of color master batches, and particularly relates to a functional color master batch and a preparation method thereof.
Technical Field
The color master batch is a novel special coloring agent for high polymer materials, and is an aggregate prepared by uniformly loading an excessive amount of pigment into a carrier resin. When the color master batch is used for coloring, the pigment can be uniformly dispersed in a product, so that the dispersing performance and the coloring efficiency of the pigment are improved.
The main body of the current common color master batch is usually polyethylene or polypropylene, and in the application publication No. CN111423649.A, the tensile strength and the bending strength of the polyethylene color master batch are improved by adding inorganic nanocrystalline. The polyethylene has general mechanical properties, low tensile strength, low heat resistance and good low-temperature resistance. The polypropylene resin has chemical resistance, heat resistance, electric insulation, high-strength mechanical property and good high-wear-resistance processing property.
Disclosure of Invention
In order to solve the above problems, a first aspect of the present invention provides a functional color master batch.
A functional color master batch comprises the following components in parts by weight: PE 200 + 450 parts; 400 portions of PP 200-; 150 portions and 250 portions of inorganic filler; 100 portions and 200 portions of inorganic pigment; 10-30 parts of metal soap; 30-60 parts of low-molecular wax; and 20-50 parts of an auxiliary agent.
Further, the PE is selected from linear polyethylene.
Further, the PP has a melt index of 1 to 5g/10min, and the test method is according to ASTM D-1238.
Further, the PP has a melt index of 2.5g/10 min.
Further, the inorganic filler is one or more of calcium carbonate, barium sulfate, glass beads, kaolin, silicon lime, talcum powder, mica, aluminum hydroxide, magnesium hydroxide and diatomite.
Further, the inorganic pigment is a natural inorganic pigment or an artificially synthesized inorganic pigment; the natural inorganic pigment is a mineral pigment; the artificially synthesized inorganic pigment is one or more of carbon black, titanium dioxide, ferric oxide, lead chrome yellow, zinc chrome yellow, cadmium yellow, iron yellow, chromium oxide, lead chrome, iron blue, cobalt blue and ultramarine.
Further, the metal soap is one or more of zinc stearate, calcium stearate, barium stearate, lead stearate, sodium stearate and magnesium stearate.
Further, the low molecular wax is one of homopolymer, oxidized homopolymer, ethylene-acrylic acid copolymer, ethylene-vinyl acetate copolymer and low molecular ionomer; the homopolymer is a PE wax.
Further, the auxiliary agent is one or more of silicon dioxide, an antistatic agent, an antioxidant, an anti-flame retardant and an anti-caking agent.
The second aspect provides a preparation method of the functional color master batch.
A method for preparing functional color master batches comprises the following steps:
(1) adding the components into stirring equipment, and uniformly stirring and mixing;
(2) carrying out high-temperature treatment, fusion, solidification and bracing treatment on the mixture in a co-rotating parallel double-screw color master machine to prepare plastic water bracing strips; the length-diameter ratio of the homodromous parallel double-screw color master machine is 30-40, and the rotating speed is 300-450 r/min;
(3) and cutting the prepared plastic water bracing piece into color master batches by a granulator.
Compared with the prior art, the invention has the beneficial effects that:
the color master batch prepared by the invention has the capability of light aging resistance, the added inorganic pigment has the ultraviolet masking effect, and meanwhile, the color master batch prepared by the invention is added with silicon dioxide, so that the friction between the color master batch and a melt extrusion brace is improved, the effects of enhancing the anti-blocking capability and the flame retardant capability of the color master batch are realized, and the deformation resistance of the color master batch is also improved. The color master batch prepared by using polyethylene and polypropylene as carrier resins has the advantages of uniform coloring, high coloring efficiency and good compatibility with polyethylene resins and polypropylene resins.
Detailed Description
In order to solve the problems, the invention provides a functional color master batch.
A functional color master batch comprises the following components in parts by weight: PE 200 + 450 parts; 400 portions of PP 200-; 150 portions and 250 portions of inorganic filler; 100 portions and 200 portions of inorganic pigment; 10-30 parts of metal soap; 30-60 parts of low-molecular wax; and 20-50 parts of an auxiliary agent.
Further, the PE has a melt index of 20g/10min, and the test method is according to ASTM D-1238 and the type is PE-L-M2320.
PE, polyethylene, is a thermoplastic resin obtained by polymerizing ethylene. No odor and no toxicity, feels like wax, and has excellent low temperature resistance.
Further, the PP has a melt index of 1 to 5g/10min, and the test method is according to ASTM D-1238.
Further, the PP has a melt index of 2.5g/10min and a model number of K8003.
PP and polypropylene are colorless, odorless, nontoxic and semitransparent solid substances, and have chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high-wear-resistance processing properties.
Further, the inorganic filler is one or more of calcium carbonate, barium sulfate, glass beads, kaolin, silicon lime, talcum powder, mica, aluminum hydroxide, magnesium hydroxide and diatomite.
Further, the inorganic pigment is a natural inorganic pigment or an artificially synthesized inorganic pigment; the natural inorganic pigment is a mineral pigment; the artificially synthesized inorganic pigment is one or more of carbon black, titanium dioxide, ferric oxide, lead chrome yellow, zinc chrome yellow, cadmium yellow, iron yellow, chromium oxide, lead chrome, iron blue, cobalt blue and ultramarine.
Further, the metal soap is one or more of zinc stearate, calcium stearate, barium stearate, lead stearate, sodium stearate and magnesium stearate.
The metal soap is a metal salt obtained by reacting a metal other than an alkali metal, a metal oxide or a salt thereof with a fatty acid, abietic acid, naphthenic acid or the like.
Further, the low molecular wax is one of homopolymer, oxidized homopolymer, ethylene-acrylic acid copolymer, ethylene-vinyl acetate copolymer and low molecular ionomer; the homopolymer is a PE wax.
The PE wax is a PE wax commonly used in the art without any limitation.
The low molecular wax is a series of oligomers with different performances, which are prepared by cracking and oxidizing various polyethylene, polypropylene, polystyrene or other high molecular modifiers serving as raw materials.
Further, the auxiliary agent is one or more of silicon dioxide, an antistatic agent, an antioxidant, an anti-flame retardant and an anti-caking agent.
The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
In addition, the starting materials used are all commercially available, unless otherwise specified.
Example 1
The color master batch comprises the following components in parts by weight:
300 parts of PE; 300 parts of PP; 200 parts of calcium carbonate; 150 parts of carbon black; 10 parts of zinc stearate; 50 parts of PE wax; and 20 parts of silicon dioxide.
The melt index of PE was 20g/10min, and was purchased from Bohui plastification, Inc., Kunshan, model number PE-L-M2320.
The melt index of PP was 2.5g/10min and was purchased from Shanghai Seikeke petrochemical company, Inc. under the model number K8003.
Carbon black was purchased from Chongqing Kaiyin chemical Co., Ltd, model number ZY-4.
Calcium carbonate, CAS: 471-34-1.
Zinc stearate, CAS: 557-05-1.
Silica, CAS: 7631-86-9.
The color master batch preparation process comprises the following steps:
(1) adding the components into stirring equipment, and uniformly stirring and mixing;
(2) carrying out high-temperature treatment, fusion, solidification and bracing treatment on the mixture in a co-rotating parallel double-screw color master machine to prepare plastic water bracing strips; the length-diameter ratio of the homodromous parallel double-screw color master machine is 40, and the rotating speed is 450 r/min;
(3) and cutting the prepared plastic water bracing piece into color master batches by a granulator.
Example 2
The color master batch comprises the following components in parts by weight:
200 parts of PE; 400 parts of PP; 200 parts of calcium carbonate; 150 parts of titanium dioxide; 20 parts of zinc stearate; 70 parts of PE wax; and 20 parts of silicon dioxide.
Titanium dioxide, CAS: 13463-67-7.
The components were purchased from the same manufacturer and model as in example 1 except for carbon black.
The color master batch preparation process comprises the following steps:
(1) adding the components into stirring equipment, and uniformly stirring and mixing;
(2) carrying out high-temperature treatment, fusion, solidification and bracing treatment on the mixture in a co-rotating parallel double-screw color master machine to prepare plastic water bracing strips; the length-diameter ratio of the homodromous parallel double-screw color master machine is 40, and the rotating speed is 450 r/min;
(3) and cutting the prepared plastic water bracing piece into color master batches by a granulator.
Example 3
The color master batch comprises the following components in parts by weight:
450 parts of PE; 200 parts of PP; 200 parts of calcium carbonate; 150 parts of carbon black; 20 parts of zinc stearate; 70 parts of PE wax; and 20 parts of silicon dioxide.
The manufacturers and models of the components are the same as those of example 1.
The color master batch preparation process comprises the following steps:
(1) adding the components into stirring equipment, and uniformly stirring and mixing;
(2) carrying out high-temperature treatment, fusion, solidification and bracing treatment on the mixture in a co-rotating parallel double-screw color master machine to prepare plastic water bracing strips; the length-diameter ratio of the homodromous parallel double-screw color master machine is 40, and the rotating speed is 450 r/min;
(3) and cutting the prepared plastic water bracing piece into color master batches by a granulator.
Comparative example 1
The color master batch comprises the following components in parts by weight:
300 parts of PP; 300 parts of calcium carbonate; 200 parts of calcium carbonate; 150 parts of carbon black; 10 parts of zinc stearate; 50 parts of PE wax.
The manufacturers and models of the components are the same as those of example 1.
The color master batch preparation process comprises the following steps:
(1) adding the components into stirring equipment, and uniformly stirring and mixing;
(2) carrying out high-temperature treatment, fusion, solidification and bracing treatment on the mixture in a co-rotating parallel double-screw color master machine to prepare plastic water bracing strips; the length-diameter ratio of the homodromous parallel double-screw color master machine is 40, and the rotating speed is 450 r/min;
(3) and cutting the prepared plastic water bracing piece into color master batches by a granulator.
Comparative example 2
The difference from example 1 is that PP having a melt index of 26g/10min and a type K7926 was purchased from petrochemical company, Inc., Shanghai Seikeke.
Performance testing
The color concentrates obtained in the different examples and comparative examples were subjected to tensile yield strength and light aging resistance measurements, and the data are reported in table 1.
TABLE 1
Examples Tensile yield strength MPa Color fastness to color change
Example 1 25.6 4-5
Example 2 26.2 4-5
Example 3 24.4 4-5
Comparative example 1 17.3 4
Comparative example 2 11.8 4
Note: the standard for implementation of tensile yield strength is GB/T-1040.2. The smaller the tensile yield strength, the more susceptible the plastic is to deformation from external forces.
The light aging resistance test standard is referred to GB/T15596-. The color fastness was best at 5 and worst at 1.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may modify or change the technical content of the above disclosure into equivalent embodiments with equivalent changes, but all those simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the present invention.

Claims (10)

1. A functional color master batch is characterized in that: comprises the following components in parts by weight: PE 200 + 450 parts; 400 portions of PP 200-; 150 portions and 250 portions of inorganic filler; 100 portions and 200 portions of inorganic pigment; 10-30 parts of metal soap; 30-60 parts of low-molecular wax; and 20-50 parts of an auxiliary agent.
2. The functional color masterbatch of claim 1, wherein: the PE is selected from linear polyethylene.
3. The functional color masterbatch of claim 1, wherein: the PP has a melt index of 1 to 5g/10min, the test method being according to ASTM D-1238.
4. The functional color masterbatch of claim 3, wherein: the melt index of the PP is 2.5g/10 min.
5. The functional color masterbatch of claim 1, wherein: the inorganic filler is one or more of calcium carbonate, barium sulfate, glass beads, kaolin, silicon lime, talcum powder, mica, aluminum hydroxide, magnesium hydroxide and diatomite.
6. The functional color masterbatch of claim 1, wherein: the inorganic pigment is natural inorganic pigment or artificially synthesized inorganic pigment; the natural inorganic pigment is a mineral pigment; the artificially synthesized inorganic pigment is one or more of carbon black, titanium dioxide, ferric oxide, lead chrome yellow, zinc chrome yellow, cadmium yellow, iron yellow, chromium oxide, lead chrome, iron blue, cobalt blue and ultramarine.
7. The functional color masterbatch of claim 1, wherein: the metal soap is one or more of zinc stearate, calcium stearate, barium stearate, lead stearate, sodium stearate and magnesium stearate.
8. The functional color masterbatch of claim 1, wherein: the low molecular wax is one of homopolymer, oxidized homopolymer, ethylene-acrylic acid copolymer, ethylene-vinyl acetate copolymer and low molecular ionomer; the homopolymer is a PE wax.
9. The functional color masterbatch of claim 1, wherein: the auxiliary agent is one or more of silicon dioxide, an antistatic agent, an antioxidant, an anti-flame retardant and an anti-caking agent.
10. The method for preparing the functional color masterbatch according to claim 1, wherein the method comprises the following steps: adding the components into stirring equipment, stirring and mixing uniformly, carrying out high-temperature treatment, fusion, solidification and bracing treatment on the mixture in a co-rotating parallel double-screw color master machine to obtain plastic water bracing strips, and cutting the plastic water bracing strips into color master batches through a granulator; the length-diameter ratio of the homodromous parallel double-screw color master machine is 30-40, and the rotating speed is 300-450 r/min.
CN202011626825.6A 2020-12-31 2020-12-31 Functional color master batch and preparation method thereof Pending CN112778608A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114437378A (en) * 2022-03-09 2022-05-06 佛山市高明彩盈福新材料有限公司 PP material blue phase control method and PP material
CN114874533A (en) * 2022-05-12 2022-08-09 深圳市普拉托科技有限公司 Ageing-resistant commodity circulation tray

Citations (7)

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Publication number Priority date Publication date Assignee Title
CN1110975A (en) * 1994-03-15 1995-11-01 赫彻斯特股份公司 Coloring agent adapted for preparation master agent of color
CN101691438A (en) * 2009-09-22 2010-04-07 广州市波斯塑胶颜料有限公司 ABS color master batch
CN102604228A (en) * 2012-03-20 2012-07-25 广州市聚赛龙工程塑料有限公司 Multi-functional plastic masterbatch and preparation method thereof
CN107619520A (en) * 2017-09-04 2018-01-23 珠海市南蓝塑胶科技有限公司 For polyethylene or polyacrylic blue phase black agglomerate and preparation method thereof
CN109251385A (en) * 2017-07-06 2019-01-22 无锡小天鹅股份有限公司 Antibiotic plastic Masterbatch and its preparation method and application and antibacterial plastic product and its preparation method and application
CN111423649A (en) * 2020-05-13 2020-07-17 中著(杭州)知识产权运营有限公司 Polyethylene color master batch and preparation method thereof
CN111534003A (en) * 2020-06-16 2020-08-14 含山县领创新材料科技有限公司 Masterbatch production process for improving coloring uniformity of plastic masterbatch

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1110975A (en) * 1994-03-15 1995-11-01 赫彻斯特股份公司 Coloring agent adapted for preparation master agent of color
CN101691438A (en) * 2009-09-22 2010-04-07 广州市波斯塑胶颜料有限公司 ABS color master batch
CN102604228A (en) * 2012-03-20 2012-07-25 广州市聚赛龙工程塑料有限公司 Multi-functional plastic masterbatch and preparation method thereof
CN109251385A (en) * 2017-07-06 2019-01-22 无锡小天鹅股份有限公司 Antibiotic plastic Masterbatch and its preparation method and application and antibacterial plastic product and its preparation method and application
CN107619520A (en) * 2017-09-04 2018-01-23 珠海市南蓝塑胶科技有限公司 For polyethylene or polyacrylic blue phase black agglomerate and preparation method thereof
CN111423649A (en) * 2020-05-13 2020-07-17 中著(杭州)知识产权运营有限公司 Polyethylene color master batch and preparation method thereof
CN111534003A (en) * 2020-06-16 2020-08-14 含山县领创新材料科技有限公司 Masterbatch production process for improving coloring uniformity of plastic masterbatch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114437378A (en) * 2022-03-09 2022-05-06 佛山市高明彩盈福新材料有限公司 PP material blue phase control method and PP material
CN114874533A (en) * 2022-05-12 2022-08-09 深圳市普拉托科技有限公司 Ageing-resistant commodity circulation tray

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Application publication date: 20210511