CN109721836B - Flame-retardant shading low-shrinkage polypropylene composite material and preparation method thereof - Google Patents
Flame-retardant shading low-shrinkage polypropylene composite material and preparation method thereof Download PDFInfo
- Publication number
- CN109721836B CN109721836B CN201811573724.XA CN201811573724A CN109721836B CN 109721836 B CN109721836 B CN 109721836B CN 201811573724 A CN201811573724 A CN 201811573724A CN 109721836 B CN109721836 B CN 109721836B
- Authority
- CN
- China
- Prior art keywords
- flame
- parts
- retardant
- polypropylene
- shrinkage
- 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.)
- Active
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a flame-retardant shading low-shrinkage polypropylene composite material and a preparation method thereof, wherein the flame-retardant shading low-shrinkage polypropylene composite material comprises the following components in parts by weight: 33.1-39.1 parts of polypropylene, 5-10 parts of calcium sulfate whisker, 5-10 parts of wollastonite, 5-10 parts of glass fiber, 5-8 parts of compatilizer, 10-20 parts of titanium dioxide, 0-4 parts of flame retardant synergist, 13-20 parts of flame retardant, 0.2-0.4 part of antioxidant and 0.5-1 part of lubricant. The modified polypropylene material can achieve the effects of shading light, low shrinkage, V2-grade flame retardance, 750-DEG C glowing filament flammability index and 125-DEG C hot bulb pressure, and simultaneously maintains certain toughness. The flame-retardant polypropylene material can replace a PC material to be applied to components such as a rear cover and a lamp housing of a ceiling lamp, the product cost is reduced, and the application field of the flame-retardant polypropylene material is widened.
Description
Technical Field
The invention relates to the technical field of new materials, and particularly relates to a flame-retardant shading low-shrinkage polypropylene composite material and a preparation method thereof.
Background
China is a big manufacturing country of lighting electrical products, a perfect lighting electrical product manufacturing chain is provided, and the existing lighting electrical products are sold in 220 countries and regions. China is also a large-scale consumer market of lighting electrical products, and the domestic lighting market accounts for more than 20% of the global lighting market. With the vigorous development of the real estate industry and the improvement of the living level of the materials, more and more enterprises produce lighting appliances.
The mainstream material used in the lighting industry is polycarbonate material, which has excellent mechanical property, optical property, insulating property, flame retardant property and dimensional stability, but has higher cost. The polypropylene material with low cost has excellent processability and chemical resistance and good mechanical property and insulating property, but the application of the polypropylene material in the lighting and electrical appliance industry is limited due to poor flame retardant property and dimensional stability of the polypropylene material.
Patent CN201610682477.1 discloses a polypropylene composite material with high light shading degree, which comprises polypropylene, polyolefin elastomer, titanium dioxide, mica powder, antioxidant, nucleating agent and lubricant, wherein the titanium dioxide and the mica powder which are mixed according to a certain mass ratio are added into the polypropylene material, so that the light shading property of the polypropylene material is improved, and the mechanical property of the light shading polypropylene material is improved by adding glass fiber. However, the lighting electrical appliance is easy to fire under the conditions of overhigh temperature and aging of components, so that potential safety hazards are caused.
Disclosure of Invention
In order to solve the defects and problems in the prior art, the invention provides a flame-retardant shading low-shrinkage polypropylene composite material, which comprises the following components in parts by weight:
further, the polypropylene is composed of homopolymerized polypropylene and copolymerized polypropylene, wherein the crystallinity of the homopolymerized polypropylene is more than 60%, and the melt flow rate is not less than 20g/10 min; the melt flow rate of the copolymerized polypropylene is not less than 30g/10 min.
Furthermore, the wollastonite and the calcium sulfate whisker have an average diameter of 6-8 mu m and an average length of 150-200 mu m, and are treated by a silane coupling agent in advance.
Furthermore, the glass fiber is alkali-free chopped glass fiber of Taishan glass fiber company, the average diameter of which is 11um, and the glass fiber is treated by a silane coupling agent in advance.
Further, the compatilizer is maleic anhydride grafted polypropylene, and the grafting rate is 0.8%.
Further, the titanium dioxide is rutile type and is treated by a silane coupling agent in advance.
Further, the flame retardant synergist is antimony trioxide, and the flame retardant is at least one of decabromodiphenylethane and octabromothioether.
Further, the antioxidant is at least one of phosphite antioxidant and hindered phenol antioxidant, and the lubricant is at least one of vinyl bis stearamide and silicone master batch.
The invention also provides a preparation method of the flame-retardant shading low-shrinkage polypropylene composite material, which comprises the following steps:
weighing materials except the calcium sulfate whiskers, the wollastonite and the glass fibers according to corresponding components and weight ratios, mixing for 15min in a high-speed mixer, uniformly mixing the raw materials, and extruding and granulating the mixed blend through a double-screw extruder; wherein, the calcium sulfate whisker and the wollastonite are fed from the 6 th area side according to the corresponding weight proportion, and the glass fiber is fed from the 8 th area side according to the corresponding weight proportion.
Further, the temperatures of the zones of the extruder are 160 ℃, 170 ℃, 180 ℃, 190 ℃, 200 ℃, 205 ℃, 195 ℃ and 185 ℃ in sequence from the feeding section to the head, the length-diameter ratio of the extrusion screw is 44, and the rotating speed of the extrusion screw is 400 r/min.
The problems of shading and low shrinkage of polypropylene materials are solved in the prior art, and the flame retardant requirement of lighting products is not considered. In addition, the addition of the calcium sulfate whiskers and the glass fibers in the processing process increases the shearing between the screw and the material, and the decomposition of the flame retardant is inevitably caused. Calcium sulfate whiskers and glass fibers are added in the double-side feeding process, so that shearing of whiskers and glass fibers can be reduced, on one hand, decomposition of a flame retardant is avoided, on the other hand, the lengths of the calcium sulfate whiskers and the glass fibers can be effectively maintained, the longer the lengths of the calcium sulfate whiskers and the glass fibers are, the larger the bridging energy transfer effect in a polymer matrix is, and further the overall performance of the material is improved.
The flame retardant and the flame retardant synergist play a flame retardant role, and heat, oxygen and flame are separated by a carbon layer formed during combustion and generated non-combustible gas. The V2 grade flame retardant and 750 ℃ glow wire performance are achieved by the two additives. The shading is a result generated by the synergistic effect of the titanium dioxide and the flame retardant, and the added calcium sulfate whisker and the glass fiber also have good shading effect. The low shrinkage is mainly due to the added calcium sulfate whiskers and glass fibers. The polypropylene material shrinks because of crystallization, the shrinkage is generally between 1.8 and 2.2 percent, the added filler slows down the shrinkage of the material, and the shape, the particle size, the aspect ratio and the thickness of the filler have an influence on the shrinkage of the PP material.
The modified polypropylene material can achieve the effects of shading light, low shrinkage, V2-grade flame retardance, 750-DEG C glowing filament flammability index and 125-DEG C hot bulb pressure, and simultaneously maintains certain toughness. The flame-retardant polypropylene material can replace a PC material to be applied to components such as a rear cover and a lamp housing of a ceiling lamp, the product cost is reduced, and the application field of the flame-retardant polypropylene material is widened.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention provides examples 1-3 and comparative examples 1-3.
Table 1: compositions and proportions of examples and comparative examples in weight proportions
The preparation methods of the above examples and comparative examples include: weighing materials except the calcium sulfate whiskers, the wollastonite and the glass fibers according to corresponding components and weight ratios, mixing for 15min in a high-speed mixer, uniformly mixing the raw materials, and extruding and granulating the mixed blend through a double-screw extruder; wherein, the calcium sulfate whisker and the wollastonite are fed from the 6 th area side according to the corresponding weight proportion, and the glass fiber is fed from the 8 th area side according to the corresponding weight proportion.
Further, the temperatures of the zones of the extruder are 160 ℃, 170 ℃, 180 ℃, 190 ℃, 200 ℃, 205 ℃, 195 ℃ and 185 ℃ in sequence from the feeding section to the head, the length-diameter ratio of the extrusion screw is 44, and the rotating speed of the extrusion screw is 400 r/min.
A certain amount of flame-retardant light-blocking low-shrinkage polypropylene composite was prepared by examples 1 to 3 and comparative examples 1 to 3 and tested under the same conditions, and the experimental results are shown in table 2.
TABLE 2 Experimental results for examples 1-3 and comparative examples 1-3
As can be seen from the test in Table 2, the modified polypropylene material of the invention enhances the shrinkage rate and the strength of the material so as to meet the requirements of the size and the pressure bearing of a workpiece; the shading performance is improved, so that the optical loss is reduced, and the daily life requirement is met; the flame retardant property and glow wire resistance of the material are improved, so that the use safety of the product is improved, and the use range of the product is expanded.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The flame-retardant shading low-shrinkage polypropylene composite material is characterized by comprising the following components in parts by weight:
33.1 to 39.1 portions of polypropylene
5-10 parts of calcium sulfate whisker
5-10 parts of wollastonite
5-10 parts of glass fiber
5-8 parts of compatilizer
10-20 parts of titanium dioxide
0-4 parts of flame-retardant synergist
13-20 parts of flame retardant
0.2 to 0.4 portion of antioxidant
0.5-1 part of lubricant;
the wollastonite and the calcium sulfate whisker with the average diameter of 6-8 mu m and the average length of 150-200 mu m are treated by a silane coupling agent in advance;
the glass fiber is alkali-free chopped glass fiber with the average diameter of 11 mu m and is treated by a silane coupling agent in advance;
the preparation method of the flame-retardant shading low-shrinkage polypropylene composite material comprises the following steps:
weighing materials except the calcium sulfate whiskers, the wollastonite and the glass fibers according to corresponding components and weight ratios, mixing for 15min in a high-speed mixer, uniformly mixing the raw materials, and extruding and granulating the mixed blend through a double-screw extruder; wherein, the calcium sulfate whisker and the wollastonite are fed from the 6 th area side according to the corresponding weight proportion, and the glass fiber is fed from the 8 th area side according to the corresponding weight proportion.
2. The flame-retardant shading low-shrinkage polypropylene composite material as claimed in claim 1, wherein the polypropylene is composed of homo-polypropylene and co-polypropylene, wherein the crystallinity of the homo-polypropylene is above 60%, and the melt flow rate is not less than 20g/10 min; the melt flow rate of the copolymerized polypropylene is not less than 30g/10 min.
3. The flame retardant, opacifying, low shrink polypropylene composite of claim 1, wherein the compatibilizer is maleic anhydride grafted polypropylene with a grafting of 0.8%.
4. The flame-retardant shading low-shrinkage polypropylene composite material as claimed in claim 1, wherein the titanium dioxide is rutile type and is treated with a silane coupling agent in advance.
5. The flame-retardant shading low-shrinkage polypropylene composite material as claimed in claim 1, wherein the flame-retardant synergist is antimony trioxide, and the flame retardant is at least one of decabromodiphenylethane and octabromothioether.
6. The flame-retardant shading low-shrinkage polypropylene composite material as claimed in claim 1, wherein the antioxidant is at least one of phosphite antioxidant and hindered phenol antioxidant, and the lubricant is at least one of vinyl bis-stearamide and silicone master batch.
7. The flame retardant and opacifying low shrink polypropylene composite according to claim 1, wherein the temperature of each zone of the extruder is, in order from the feed section to the head, 160 ℃, 170 ℃, 180 ℃, 190 ℃, 200 ℃, 205 ℃, 195 ℃, 185 ℃, the aspect ratio of the extrusion screw is 44, and the rotation speed of the extrusion screw is 400 rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811573724.XA CN109721836B (en) | 2018-12-21 | 2018-12-21 | Flame-retardant shading low-shrinkage polypropylene composite material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811573724.XA CN109721836B (en) | 2018-12-21 | 2018-12-21 | Flame-retardant shading low-shrinkage polypropylene composite material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109721836A CN109721836A (en) | 2019-05-07 |
| CN109721836B true CN109721836B (en) | 2021-05-11 |
Family
ID=66296972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811573724.XA Active CN109721836B (en) | 2018-12-21 | 2018-12-21 | Flame-retardant shading low-shrinkage polypropylene composite material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109721836B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112063045B (en) * | 2020-08-25 | 2022-11-04 | 上海日之升科技有限公司 | Low-odor high-glowing filament flame-retardant polypropylene alloy composition in high-temperature environment |
| CN113174106A (en) * | 2020-12-14 | 2021-07-27 | 浙江金华威达日化包装实业有限公司 | PP material with high shading rate and high toughness and preparation method thereof |
| CN113845724B (en) * | 2021-10-18 | 2023-12-15 | 上海金发科技发展有限公司 | Heat-aging-resistant shading polypropylene material and preparation method thereof |
| CN115505207B (en) * | 2022-09-29 | 2023-11-10 | 宁波公牛光电科技有限公司 | Short glass fiber reinforced flame-retardant polypropylene material, application and preparation method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693776A (en) * | 2009-09-18 | 2010-04-14 | 苏州禾盛新型材料股份有限公司 | Novel high-intensity high heat-resistance polypropylene modified composite material and preparation method thereof |
| CN103073794A (en) * | 2013-01-11 | 2013-05-01 | 中山赛特工程塑料有限公司 | Special material for high-rigidity high-heat-resistance low-shrinkage air conditioning wind wheel and preparation method thereof |
| CN103333415A (en) * | 2013-07-11 | 2013-10-02 | 广东天保再生资源发展有限公司 | Modified polypropylene material with low molding shrinkage and without buckling deformation and preparation method of modified polypropylene material |
| CN103965544A (en) * | 2013-01-25 | 2014-08-06 | 上海杰事杰新材料(集团)股份有限公司 | High strength antibacterial polypropylene composite material and preparation method thereof |
| CN106589581A (en) * | 2016-11-18 | 2017-04-26 | 江苏沃特新材料科技有限公司 | Special material for wind wheels of air conditioners and preparation method for special material |
| CN107513225A (en) * | 2017-09-26 | 2017-12-26 | 上海日之升科技有限公司 | A kind of LED high shading high reflection PP composite materials and preparation method thereof |
| CN107759898A (en) * | 2016-08-18 | 2018-03-06 | 江苏金发科技新材料有限公司 | High obscurity PP composite material and preparation method thereof |
-
2018
- 2018-12-21 CN CN201811573724.XA patent/CN109721836B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693776A (en) * | 2009-09-18 | 2010-04-14 | 苏州禾盛新型材料股份有限公司 | Novel high-intensity high heat-resistance polypropylene modified composite material and preparation method thereof |
| CN103073794A (en) * | 2013-01-11 | 2013-05-01 | 中山赛特工程塑料有限公司 | Special material for high-rigidity high-heat-resistance low-shrinkage air conditioning wind wheel and preparation method thereof |
| CN103965544A (en) * | 2013-01-25 | 2014-08-06 | 上海杰事杰新材料(集团)股份有限公司 | High strength antibacterial polypropylene composite material and preparation method thereof |
| CN103333415A (en) * | 2013-07-11 | 2013-10-02 | 广东天保再生资源发展有限公司 | Modified polypropylene material with low molding shrinkage and without buckling deformation and preparation method of modified polypropylene material |
| CN107759898A (en) * | 2016-08-18 | 2018-03-06 | 江苏金发科技新材料有限公司 | High obscurity PP composite material and preparation method thereof |
| CN106589581A (en) * | 2016-11-18 | 2017-04-26 | 江苏沃特新材料科技有限公司 | Special material for wind wheels of air conditioners and preparation method for special material |
| CN107513225A (en) * | 2017-09-26 | 2017-12-26 | 上海日之升科技有限公司 | A kind of LED high shading high reflection PP composite materials and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109721836A (en) | 2019-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109721836B (en) | Flame-retardant shading low-shrinkage polypropylene composite material and preparation method thereof | |
| CN112250935B (en) | High-flame-retardant-grade low-smoke halogen-free material and preparation method and application thereof | |
| CN109627567A (en) | A kind of B1 grades of fire-retardant irradiated crosslinking low-smoke and halogen-free insulated cable material and preparation method thereof | |
| CN101817972A (en) | Flame-retardant enhanced PBT material and preparation method thereof | |
| CN111019242B (en) | Impact-resistant, heat-resistant and flame-retardant MPP power pipe material and preparation method thereof | |
| CN109021386A (en) | A kind of corrosion proof cable material 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 | |
| CN109370043A (en) | A kind of low cost, which can pass through the short glass fiber of UL94-5VA, enhances halogen-free anti-flaming polypropylene material and preparation method thereof | |
| CN103333469A (en) | Halogen-free flame-retardant PET (polyethylene terephthalate) composite material and preparation method thereof | |
| CN103450549A (en) | Expansive type halogen-free flame-retardant cable material | |
| CN109824974A (en) | A kind of halogen-free flame-retardant composite material and preparation method thereof of high flowing antibacterial | |
| CN112194845A (en) | Halogen flame-retardant reinforced polypropylene composite material and preparation method thereof | |
| CN104817838A (en) | High-toughness halogen-free flame-retardant PC/ABS (polycarbonate/acrylonitrile-butadiene-styrene) alloy reflecting material and preparation method thereof | |
| CN104829957A (en) | Halogen-free flame-retardant polyamide 6-polystyrene alloy material and preparation method thereof | |
| CN108624027A (en) | A kind of catalysis carbon-forming efficient halogen-free anti-inflaming PC/ABS mixtures and preparation method thereof | |
| CN113025025A (en) | A2-grade fireproof aluminum-plastic plate core material, preparation method thereof and aluminum-plastic plate | |
| CN109535629B (en) | Full-shading polypropylene composite material for lamps and preparation method thereof | |
| CN101353473A (en) | Highly transparent flame-retardant polycarbonate material, film and sheet material products thereof | |
| CN112552677B (en) | Modified nylon 66 composition and preparation method thereof | |
| CN112080073A (en) | Flame-retardant antibacterial PP-ps composite material and preparation method thereof | |
| CN101935444A (en) | High-temperature-resistant halogen-free phosphorus flame-retardant polycarbonate film and preparation method thereof | |
| CN115505207B (en) | Short glass fiber reinforced flame-retardant polypropylene material, application and preparation method | |
| CN117447790B (en) | High-performance PP-PE-PBT flame-retardant composite shell material and preparation method thereof | |
| CN110564006A (en) | Flame retardant for low-density polyethylene, preparation method and application thereof | |
| CN115895251B (en) | Halogen-free flame-retardant reinforced PPO/PPA alloy 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |