CN104448574A - Environment-friendly weather-resistant flame-retardant PP material and preparation method thereof - Google Patents
Environment-friendly weather-resistant flame-retardant PP material and preparation method thereof Download PDFInfo
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- CN104448574A CN104448574A CN201410717742.6A CN201410717742A CN104448574A CN 104448574 A CN104448574 A CN 104448574A CN 201410717742 A CN201410717742 A CN 201410717742A CN 104448574 A CN104448574 A CN 104448574A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/015—Additives for heat shrinkable compositions
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
Abstract
The invention relates to an environment-friendly weather-resistant flame-retardant PP material and a preparation method thereof. The PP material is prepared from the following components in percentage by weight: 20-30% of homo-polypropylene, 35-45% of polypropylene copolymer, 25-30% of a compound expansive type halogen-free flame-retardant, 5-10% of talcum powder, 0.2-0.4% of an ultraviolet light absorber, 0.2-0.4% of an antioxidant and 0.2-0.5% of a lubricant. The process comprises the following steps: firstly adding the materials in proportion into a mixing barrel to be uniformly mixed; then adding the mixture into a twin-screw extruder to be mixed, wherein the extruding temperatures of the first and second sections of the twin-screw extruder are 160-170 DEG C while the extruding temperatures of other sections are 170-190 DEG C and the total standing time of reactants in the twin-screw extruder is 3-5 minutes; and finally, cooling and slicing the extruded material obtained to obtain the environment-friendly weather-resistant flame-retardant PP material. By modifying PP, the material is environmentally friendly and flame-retardant, and also can satisfy the long-term anti-aging using requirement outdoors.
Description
Technical field
The present invention relates to polypropylene material, particularly relate to fire-retardant PP material of a kind of environment-friendlyweather-proof weather-proof and preparation method thereof.
Background technology
Polypropylene (PP) is as a kind of resins for universal use, the all respects of daily life are widely used in, as industries such as automobile, home electronic appliance, office goods, there is excellent mechanical property and good processability, thermotolerance, chemical resistant properties, and density is little, relative low price, stable performance.Fire-retardant PP has become maximum, the fastest-rising flame retardance of polymer material of use flame retardant amount.Along with the enforcement of ROHS instruction, the environmental protection flame retardant PP meeting ROHS instruction more and more receives the concern of people.
Traditional polypropylene fire retardant method of modifying be add halogen containing flame-retardant (as, decabromodiphenyl oxide, hexabromocyclododecane, eight bromo ether etc.), but it is fire-retardant that interpolation halogen containing flame-retardant is made, while burning plays usefulness, contaminate environment, the cigarette be detrimental to health and corrosive gases can be discharged, the destruction of these corrosive gasess to buildings and equipment even exceedes fire itself, more seriously when the burning of some bromide fire retardant or hot tearing, poisonous carcinogens many bromos dibenzodioxin alkane and PBDF can be formed.Therefore new fire retardant is needed: expansion type flame retardant.When adding the polypropylene burning of expansion type flame retardant, the uniform carbonaceous foam layer of one deck can be formed on surface, this layer of charcoal to be on good terms the effect played heat insulation, oxygen barrier, press down cigarette and anti-molten drop in cohesion, and Halogen, low cigarette, low toxicity, non-corrosiveness gas, on the impact of PP mechanical property and processing characteristics also more when young, the shortcoming existed in conventional flame retardant technology is substantially overcomed.
PP goods are widely used in outdoor material, as the plastic seat of large-scale outdoor gymnasium, exterior decorative materials, automobile component and household electrical appliance etc.But because the weathering resistance of PP is poor, the hydrogen on tertiary carbon atom is oxidizable, very sensitive to ultraviolet, easily degrades under oxygen and action of ultraviolet radiation.Oxidation inhibitor is added and ultraviolet agent effectively slows down the aging of PP material in PP material.
Summary of the invention
The object of the invention is the deficiency overcoming prior art existence, fire-retardant PP material of a kind of environment-friendlyweather-proof weather-proof and preparation method thereof is provided, by PP modification, both environmental protection flame retardant, outdoor chronic anti-aging service requirements can be met again.
Object of the present invention is achieved through the following technical solutions:
The fire-retardant PP material of environment-friendlyweather-proof weather-proof, feature is to comprise following weight percent composition: homopolymerization PP: 20 ~ 30%, copolymerization PP:35 ~ 45%, composite expanding halide-free fire-retardant: 25 ~ 30%, talcum powder: 5 ~ 10%, UV light absorber: 0.2 ~ 0.4%, oxidation inhibitor: 0.2 ~ 0.4%, lubricant: 0.2 ~ 0.5%.
Further, the fire-retardant PP material of above-mentioned environment-friendlyweather-proof weather-proof, its component: homopolymerization PP: 25%, copolymerization PP:40%, composite expanding halide-free fire-retardant: 27%, talcum powder: 7%, UV light absorber: 0.3%, oxidation inhibitor: 0.4%, lubricant: 0.3%.
Further, the fire-retardant PP material of above-mentioned environment-friendlyweather-proof weather-proof, the melting index of described homopolymerization PP is 0.8 ~ 5.0g/10min, and the melting index of described copolymerization PP is 10 ~ 20g/10min; Described talcous particle diameter is at 1250 ~ 2000 orders; Described composite expanding halide-free fire-retardant is phosphorous-nitrogen system bittern-free fire retardant; Described UV light absorber is the compound of UV light absorber 770 and UV light absorber 2020; Described oxidation inhibitor is the compound of antioxidant 1010 and irgasfos 168; Described lubricant is ethylene bis stearamide.
The preparation method of the fire-retardant PP material of environment-friendlyweather-proof weather-proof, comprises the following steps:
1. raw material mixes: to be added in tempering tank by each constituent materials according to proportioning and make it to mix;
2. mixing in twin screw extruder: mixture step 1. obtained adds in twin screw extruder mixing; Twin screw extruder has six sections, and first paragraph and second segment extrusion temperature are at 160 ~ 170 DEG C, and other several sections of extrusion temperatures are between 170 ~ 190 DEG C; The total residence time of reactant in twin screw extruder is 3 ~ 5min, and twin screw extruder rotating speed is at 300 ~ 350r.min
-1;
3. the material obtained is extruded rear cooling, pelletizing, obtain the fire-retardant PP material of a kind of environment-friendlyweather-proof weather-proof.
Again further, the preparation method of the fire-retardant PP material of above-mentioned environment-friendlyweather-proof weather-proof, first, by 25 parts of homopolymerization PP, 40 parts of copolymerization PP, 27 parts of composite expanding halide-free fire-retardants, 7 parts of talcum powder, 0.3 part of UV light absorber, 0.4 part of oxidation inhibitor, 0.3 part of ethylene bis stearamide adds in tempering tank makes it to mix; Then, mixing at twin screw extruder, the temperature of twin screw every section is respectively: T
1=160 DEG C, T
2=170 DEG C, T
3=175 DEG C, T
4=180 DEG C, T
5=185 DEG C, T
6=190 DEG C, twin screw extruder rotating speed is r=350r.min
-1, finally, extrude, cool, namely pelletizing obtain a kind of environment-friendlyweather-proof weather-proof fire-retardant PP material.
The substantive distinguishing features that technical solution of the present invention is outstanding and significant progress are mainly reflected in:
1. adopt composite expanding halide-free fire-retardant, meet ROHS environmental requirement, and low cigarette, low toxicity, non-corrosiveness gas, also less on the impact of PP mechanical property and processing characteristics;
2. in fire retardant material, add UV light absorber and oxidation inhibitor, effectively slow down the oxidation of material, atomization process, enable material meet outdoor application requirement;
3. the method for copolymerization PP and homopolymerization PP and Inorganic Fillers Filled modification is adopted to make material have certain toughness, improve the rigidity of material simultaneously, talcum powder is selected in mineral filler, accelerate the crystallization velocity of PP, make the spherocrystal refinement of PP, accelerate the shaping speed of injection moulding on the one hand, eliminate the phenomenons such as shrink mark surface that PP molding shrinkage brings, formed product shrinking percentage be bigger than normal simultaneously, talcum powder can also delay material combustion speed simultaneously, and be worth wide popularization and application in the field of business, prospect is particularly good.
Embodiment
The fire-retardant PP material of environment-friendlyweather-proof weather-proof, the weight percent of composition is: homopolymerization PP: 20 ~ 30%, copolymerization PP:35 ~ 45%, composite expanding halide-free fire-retardant: 25 ~ 30%, talcum powder: 5 ~ 10%, UV light absorber: 0.2 ~ 0.4%, oxidation inhibitor: 0.2 ~ 0.4%, lubricant: 0.2 ~ 0.5%.Screening formulation is: homopolymerization PP: 25%, copolymerization PP:40%, composite expanding halide-free fire-retardant: 27%, talcum powder: 7%, UV light absorber: 0.3%, oxidation inhibitor: 0.4%, lubricant: 0.3%.Wherein, the melting index of homopolymerization PP is 0.8 ~ 5.0g/10min, and the melting index of copolymerization PP is 10 ~ 20g/10min; Talcous particle diameter is at 1250 ~ 2000 orders; Composite expanding halide-free fire-retardant is phosphorous-nitrogen system bittern-free fire retardant; UV light absorber is the compound of UV light absorber 770 and UV light absorber 2020; Oxidation inhibitor is the compound of antioxidant 1010 and irgasfos 168; Lubricant is ethylene bis stearamide.
Adopt composite expanding halide-free fire-retardant, meet ROHS environmental requirement, and low cigarette, low toxicity, non-corrosiveness gas, on the impact of PP mechanical property and processing characteristics also more when young.In addition, in fire retardant material, add UV light absorber and oxidation inhibitor, effectively slow down the oxidation of material, atomization process, enable material meet outdoor application requirement.The method of copolymerization PP and homopolymerization PP and Inorganic Fillers Filled modification is adopted to make material have certain toughness, improve the rigidity of material simultaneously, talcum powder is selected in mineral filler, accelerate the crystallization velocity of PP, make the spherocrystal refinement of PP, accelerate on the one hand the shaping speed of injection moulding, eliminate the phenomenons such as shrink mark surface that PP molding shrinkage brings, formed product shrinking percentage be bigger than normal, talcum powder can also delay material combustion speed simultaneously simultaneously.
Embodiment 1:
By 25 parts of homopolymerization PP, 40 parts of copolymerization PP, 27 parts of composite expanding halide-free fire-retardants, 7 parts of talcum powder, 0.3 part of UV light absorber, 0.4 part of oxidation inhibitor, 0.3 part of ethylene bis stearamide adds in high-speed mixing bucket makes it to mix; Then, mixing at twin screw extruder, the temperature of twin screw every section is respectively: T
1=160 DEG C, T
2=170 DEG C, T
3=175 DEG C, T
4=180 DEG C, T
5=185 DEG C, T
6=190 DEG C, twin screw extruder rotating speed is r=350r.min
-1, finally, extrude, cool, namely pelletizing obtain a kind of environment-friendlyweather-proof weather-proof fire-retardant PP material.
Embodiment 2:
By 20 parts of homopolymerization PP, 45 parts of copolymerization PP, 25 parts of composite expanding halide-free fire-retardants, 9 parts of talcum powder, 0.3 part of UV light absorber, 0.4 part of oxidation inhibitor, 0.3 part of ethylene bis stearamide adds in high-speed mixing bucket makes it to mix; Then, mixing at twin screw extruder, the temperature of twin screw every section is respectively: T
1=160 DEG C, T
2=170 DEG C, T
3=175 DEG C, T
4=180 DEG C, T
5=185 DEG C, T
6=190 DEG C, twin screw extruder rotating speed is r=350r.min
-1, finally, extrude, cool, namely pelletizing obtain a kind of environment-friendlyweather-proof weather-proof fire-retardant PP material.
Embodiment 3:
By 29 parts of homopolymerization PP, 35 parts of copolymerization PP, 30 parts of composite expanding halide-free fire-retardants, 5 parts of talcum powder, 0.3 part of UV light absorber, 0.4 part of oxidation inhibitor, 0.3 part of ethylene bis stearamide adds in high-speed mixing bucket makes it to mix; Then, mixing at twin screw extruder, the temperature of twin screw every section is respectively: T
1=160 DEG C, T
2=170 DEG C, T
3=175 DEG C, T
4=180 DEG C, T
5=185 DEG C, T
6=190 DEG C, twin screw extruder rotating speed is r=350r.min
-1, finally, extrude, cool, namely pelletizing obtain a kind of environment-friendlyweather-proof weather-proof fire-retardant PP material.
Embodiment 4:
By 25 parts of homopolymerization PP, 40 parts of copolymerization PP, 27 parts of composite expanding halide-free fire-retardants, 7.3 parts of talcum powder, 0.4 part of oxidation inhibitor, 0.3 part of ethylene bis stearamide adds in high-speed mixing bucket makes it to mix; Then, mixing at twin screw extruder, the temperature of twin screw every section is respectively: T
1=160 DEG C, T
2=170 DEG C, T
3=175 DEG C, T
4=180 DEG C, T
5=185 DEG C, T
6=190 DEG C, twin screw extruder rotating speed is r=350r.min
-1, finally, extrude, cool, namely pelletizing obtain a kind of environment-friendlyweather-proof weather-proof fire-retardant PP material.
After testing, adopt the modified polypropylene material that technical solution of the present invention obtains, its basic mechanical design feature index is in table 1.The tensile property of material carries out according to GB 9341 according to GB 1040 standard, modulus in flexure in Britain product Tinius Olsen material-testing machine, impact property is produced on impact tester according to GB 1843 standard testing in Chengde, melting index according to GB 3682 standard Shanghai think and reach scientific instrument company limited produce fusion index instrument on test, the Rockwell hardness instrument that Rockwell hardness produces in Shanghai material-testing machine factory according to GB 9342 standard is measured, fire-retardantly to measure in the testing tool company limited of ten thousand one-tenth, Kunshan according to UL94 standard.
Table 1 embodiment Performance comparision
In compound system, add expanding halide-free fire-retardant, make material have excellent flame retardant effect; UV light absorber adds and plays vital effect to material weathering resistance; Talcous adding reduces molding shrinkage on the one hand, improves the rigidity of material simultaneously.
To sum up obviously show, the present invention carries out modification to resins for universal use PP, and the modified polypropylene material excellent product performance of preparation, good weatherability bring considerable Social benefit and economic benefit, can be applicable on the products such as store battery.
Below be only embody rule example of the present invention, protection scope of the present invention is not constituted any limitation.The technical scheme that all employing equivalents or equivalence are replaced and formed, all drops within rights protection scope of the present invention.
Claims (10)
1. the fire-retardant PP material of environment-friendlyweather-proof weather-proof, it is characterized in that comprising following weight percent composition: homopolymerization PP: 20 ~ 30%, copolymerization PP:35 ~ 45%, composite expanding halide-free fire-retardant: 25 ~ 30%, talcum powder: 5 ~ 10%, UV light absorber: 0.2 ~ 0.4%, oxidation inhibitor: 0.2 ~ 0.4%, lubricant: 0.2 ~ 0.5%.
2. the fire-retardant PP material of environment-friendlyweather-proof weather-proof according to claim 1, is characterized in that weight percent composition: homopolymerization PP: 25%, copolymerization PP:40%, composite expanding halide-free fire-retardant: 27%, talcum powder: 7%, UV light absorber: 0.3%, oxidation inhibitor: 0.4%, lubricant: 0.3%.
3. the fire-retardant PP material of environment-friendlyweather-proof weather-proof according to claim 1 and 2, it is characterized in that: the melting index of described homopolymerization PP is 0.8 ~ 5.0g/10min, the melting index of described copolymerization PP is 10 ~ 20g/10min.
4. the fire-retardant PP material of environment-friendlyweather-proof weather-proof according to claim 1 and 2, is characterized in that: described talcous particle diameter is at 1250 ~ 2000 orders.
5. the fire-retardant PP material of environment-friendlyweather-proof weather-proof according to claim 1 and 2, is characterized in that: described composite expanding halide-free fire-retardant is phosphorous-nitrogen system bittern-free fire retardant.
6. the fire-retardant PP material of environment-friendlyweather-proof weather-proof according to claim 1 and 2, is characterized in that: described UV light absorber is the compound of UV light absorber 770 and UV light absorber 2020.
7. the fire-retardant PP material of environment-friendlyweather-proof weather-proof according to claim 1 and 2, is characterized in that: described oxidation inhibitor is the compound of antioxidant 1010 and irgasfos 168.
8. the fire-retardant PP material of environment-friendlyweather-proof weather-proof according to claim 1 and 2, is characterized in that: described lubricant is ethylene bis stearamide.
9. prepare the preparation method of the fire-retardant PP material of environment-friendlyweather-proof weather-proof described in claim 1, it is characterized in that: comprise the following steps:
1. raw material mixes: to be added in tempering tank by each constituent materials according to proportioning and make it to mix;
2. mixing in twin-screw extrusion equipment: mixture step 1. obtained adds in twin screw extruder mixing; Twin screw extruder has six sections, and first paragraph and second segment extrusion temperature are at 160 ~ 170 DEG C, and the 3rd section to the 6th section extrusion temperature is at 170 ~ 190 DEG C; The total residence time of reactant in twin screw extruder is 3 ~ 5min, and twin screw extruder rotating speed is at 300 ~ 350r.min
-1;
3. the material obtained is extruded rear cooling, pelletizing, namely obtain the fire-retardant PP material of environment-friendlyweather-proof weather-proof.
10. the preparation method of the fire-retardant PP material of environment-friendlyweather-proof weather-proof according to claim 9, it is characterized in that: first, by 25 parts of homopolymerization PP, 40 parts of copolymerization PP, 27 parts of composite expanding halide-free fire-retardants, 7 parts of talcum powder, 0.3 part of UV light absorber, 0.4 part of oxidation inhibitor, 0.3 part of ethylene bis stearamide adds in tempering tank makes it to mix; Then, mixing at twin screw extruder, the temperature of twin screw every section is respectively: T
1=160 DEG C, T
2=170 DEG C, T
3=175 DEG C, T
4=180 DEG C, T
5=185 DEG C, T
6=190 DEG C, twin screw extruder rotating speed is r=350r.min
-1, finally, extrude, cool, namely pelletizing obtain environment-friendlyweather-proof weather-proof fire-retardant PP material.
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| CN201410717742.6A CN104448574A (en) | 2014-12-01 | 2014-12-01 | Environment-friendly weather-resistant flame-retardant PP material and preparation method thereof |
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| CN201410717742.6A CN104448574A (en) | 2014-12-01 | 2014-12-01 | Environment-friendly weather-resistant flame-retardant PP material and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109093981A (en) * | 2018-07-27 | 2018-12-28 | 成都亿洲塑料制品有限公司 | A kind of manufacture craft of venue plastic seat |
| CN110317399A (en) * | 2019-06-29 | 2019-10-11 | 浙江大学 | Expanded flame-retardant polypropylene lightweighting materials and its continuous extrusion foaming preparation method |
| CN110791014A (en) * | 2019-10-19 | 2020-02-14 | 东莞市致森五金塑胶制品有限公司 | Flame-retardant PP (polypropylene) plate and preparation method thereof |
| CN110885498A (en) * | 2019-12-20 | 2020-03-17 | 广东道生科技股份有限公司 | Flame-retardant toughened polypropylene material and preparation method thereof |
| CN114410003A (en) * | 2022-01-25 | 2022-04-29 | 青岛明瑞祥塑料有限公司 | High-flame-retardancy modified plastic for ultrathin filter screen |
| CN115339201A (en) * | 2022-07-19 | 2022-11-15 | 上海盟杉科技技术发展有限公司 | Composite perforated sound-absorbing board and manufacturing method thereof |
| TWI796920B (en) * | 2021-11-05 | 2023-03-21 | 財團法人工業技術研究院 | Halogen free flame-retardant materials and method for manufacturing the same |
-
2014
- 2014-12-01 CN CN201410717742.6A patent/CN104448574A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109093981A (en) * | 2018-07-27 | 2018-12-28 | 成都亿洲塑料制品有限公司 | A kind of manufacture craft of venue plastic seat |
| CN110317399A (en) * | 2019-06-29 | 2019-10-11 | 浙江大学 | Expanded flame-retardant polypropylene lightweighting materials and its continuous extrusion foaming preparation method |
| CN110317399B (en) * | 2019-06-29 | 2020-11-13 | 浙江大学 | Expanded flame-retardant polypropylene lightweight material and continuous extrusion foaming preparation method thereof |
| CN110791014A (en) * | 2019-10-19 | 2020-02-14 | 东莞市致森五金塑胶制品有限公司 | Flame-retardant PP (polypropylene) plate and preparation method thereof |
| CN110885498A (en) * | 2019-12-20 | 2020-03-17 | 广东道生科技股份有限公司 | Flame-retardant toughened polypropylene material and preparation method thereof |
| TWI796920B (en) * | 2021-11-05 | 2023-03-21 | 財團法人工業技術研究院 | Halogen free flame-retardant materials and method for manufacturing the same |
| US11840656B2 (en) | 2021-11-05 | 2023-12-12 | Industrial Technology Research Institute | Halogen free flame-retardant materials and method for manufacturing the same |
| CN114410003A (en) * | 2022-01-25 | 2022-04-29 | 青岛明瑞祥塑料有限公司 | High-flame-retardancy modified plastic for ultrathin filter screen |
| CN115339201A (en) * | 2022-07-19 | 2022-11-15 | 上海盟杉科技技术发展有限公司 | Composite perforated sound-absorbing board and manufacturing method thereof |
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