CN105504511A - Low-shrinkage polypropylene material with excellent wall surface texture - Google Patents
Low-shrinkage polypropylene material with excellent wall surface texture Download PDFInfo
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- CN105504511A CN105504511A CN201610003443.5A CN201610003443A CN105504511A CN 105504511 A CN105504511 A CN 105504511A CN 201610003443 A CN201610003443 A CN 201610003443A CN 105504511 A CN105504511 A CN 105504511A
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- polypropylene
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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
- 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
- C08L23/12—Polypropene
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Health & Medical Sciences (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
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Abstract
The invention discloses a low-shrinkage polypropylene material with excellent wall surface texture. The polypropylene material is prepared from, by mass, 55%-70% of polypropylene, 5%-20% of polyamides, 2%-5% of maleic anhydride grafted POE, 1%-10% of lubricant, 1%-5% of nucleating agent and 10%-25% of inorganic reinforced materials, wherein polyamides are random copolymerization polyamides, and polypropylene is high-crystallized polypropylene. According to the low-shrinkage polypropylene material with the excellent wall surface texture, the formula integrates the advantages of polypropylene and polyamide resin; meanwhile, by means of matching of other components, the shrinkage mark resistant performance of the finally obtained product is excellent, the appearance quality of the product is prominent, and the polypropylene material can meet the requirement of products such as household appliances and automobiles which are higher in appearance requirement.
Description
Technical field
The present invention relates to a kind of polypropylene material of low-shrinkage wall surface texture excellence.
Background technology
Acrylic resin is as a kind of environmentally friendly material, and its use range expands rapidly.But due to polypropylene material, cooling curing speed is slow after moulding, the position of variation in thickness is there is in product, easily there is shrink mark phenomenon, shrink mark refers to the local dent formed at article surface, shrink mark often produces in the larger region of local wall thickness, the back side of muscle or thrust, does not obtain enough compensation produce by product thick wall part when cooling.This surface imperfection has a strong impact on the appearance looks elegant degree of goods, and still visible after spray coating, strongly limit the use of polypropylene material in appearance part.
Research shows, the formation of shrink mark is except outside the Pass having with product design, die design, moulding process etc., also there are much relations with material itself, first, crystalline material more easily produces shrink mark for amorphous material, because crystalline material is from molten state to the process of room temperature, molecular chain ordered arrangement forms crystal.Polypropylene material belongs to crystalline material, and shrinking percentage own is large, so be easy to produce shrink mark, secondly, the viscosity of material and filling additive etc. should also have very large impact to the product of shrink mark.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of polypropylene material of low-shrinkage wall surface texture excellence.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of polypropylene material of low-shrinkage wall surface texture excellence, be prepared from by the raw material of following component, each component is by mass percentage: polypropylene 55-70%, nylon 5-20%, maleic anhydride graft POE2-5%, lubricant 1-10%, nucleator 1-5%, inorganic reinforcement 10-25%, nylon is random copolymerization nylon, and described polypropylene is high-crystallinity polypropylene.
Preferably, described inorganic reinforcement is glass fibre, and described glass fibre is special-shaped glass fiber.The special-shaped glass fiber of surface irregularity is mutually fitted together to the frictional force that can improve fiber in goods, thus improves the intensity of matrix material.
Preferably, described nucleator is the mixture of aryl carboxylic acid and metallic salt nucleator and sorbose alcohols nucleator.
Preferably, described lubricant is the mixture of calcium stearate, metal soap lubricant and TAF.
Preferably, described nylon viscosity is 1.8-2.5.
Preferably, the percentage of grafting of described maleic anhydride graft POE is 1.3-1.5%, and melting index is 0.6-2.0g/10min (190 DEG C, 2.16kg).
The beneficial effect that the present invention reaches:
(1) maleic anhydride graft POE and inorganic reinforcement are mainly used to the intensity of strongthener, reduce material water-intake rate, improve forming materials processibility, to be highly resistant to the string stress of course of processing center core layer, thus making article surface be not easy to produce shrink mark, inside also can not produce shrinkage cavity phenomenon; Nucleator can also make crystal finer and close while raising resin rigidity, thus makes article surface smooth, improves visual appearance; Lubricant is used for regulating viscosity of material, and avoid glass emergence on the surface simultaneously, increase the consistency between each material, material obtains suitable viscosity can effectively reduce punch die resistance, improves pressurize feeding effect, improves the shrink mark of product;
(2) the present invention fills a prescription and has gathered the respective advantage of polypropylene and nylon resin, simultaneously under the cooperation of other components, make the nonshrink trace excellent performance of product finally obtained, product appearance quality is given prominence to, and can meet in the higher looking products such as household electrical appliance, automobile of appearance requirement.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
The preparation method of following examples and comparative example material all adopts melt-blending process well known in the art, and each component raw material all can be bought by commercial means and obtain.Wherein, without outside special instruction, nylon is random copolymerization nylon, and nylon viscosity is 1.8-2.5.Polypropylene is high-crystallinity polypropylene.Nucleator is the mixture of aryl carboxylic acid and metallic salt nucleator and sorbose alcohols nucleator.Lubricant is the mixture of calcium stearate, metal soap lubricant and TAF.The percentage of grafting of maleic anhydride graft POE is 1.3-1.5%, and melting index is 0.6-2.0g/10min (190 DEG C, 2.16kg).
Embodiment 1-3
Each component formula of embodiment 1-3 is in table 1, and the performance test results is in table 2.
Comparative example 1-3
Each component formula of comparative example 1-3 is in table 1, and the performance test results is in table 2.Wherein, comparative example 1 is not add nylon with the difference of embodiment 3, and comparative example 2 is to replace special-shaped glass fiber with common short glass fiber with the difference of embodiment 3, and comparative example 3 is with the difference of embodiment 3 the lubricant TAF using single-component; Comparative example 4 is not add nucleator with the difference of embodiment 3.
The each component concentration of table 1 embodiment 1-3 and comparative example 1-3 (mass percent)
The performance test results:
Performance test comprises measuring mechanical property and appearance property test, and measuring mechanical property standard measures tensile modulus according to ISO527-2/1B/1, and appearance property test uses injection moulding sample (melt temperature: about 290 DEG C; Die temperature: about 90 DEG C, and dwell pressure is 90MPa), carry out appearance and shrink mark measurement.In the mould with smooth surface (namely without texture), molding has the test sample book of 353 × 100 × 2mm rectangular shape.Test sample book has the rib of 25 × 5 × 1.5mm.The test sample book of molding dry state (DAM) is measured at 23 DEG C.Shrink mark degree of depth step instrument is measured, surfacing, the outward appearance visual method such as smooth.
The performance test results of table 2 embodiment 1-3 and comparative example 1-3
Can be found out by result in table 2, the nonshrink trace effect of this formula materials and article surface good quality, both can reach extraordinary balance, the Effect on Mechanical Properties of nylon to material is lacked larger in formula, although products appearance is smooth, shrink mark is obvious, and after using common chopped glass fiber, material shrink mark improves, but surface quality is coarse, the lubricant of polycomponent mixing all has considerable influence to the nonshrink trace performance of material and surface quality.Nucleator is larger on the surface quality impact of material equally.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (6)
1. the polypropylene material of a low-shrinkage wall surface texture excellence, it is characterized in that, be prepared from by the raw material of following component, each component by mass percentage: polypropylene 55-70%, nylon 5-20%, maleic anhydride graft POE2-5%, lubricant 1-10%, nucleator 1-5%, inorganic reinforcement 10-25%, nylon is random copolymerization nylon, and described polypropylene is high-crystallinity polypropylene.
2. the polypropylene material of a kind of low-shrinkage wall surface texture excellence according to claim 1, it is characterized in that, described inorganic reinforcement is glass fibre, and described glass fibre is special-shaped glass fiber.
3. the polypropylene material of a kind of low-shrinkage wall surface texture excellence according to claim 1 and 2, it is characterized in that, described nucleator is the mixture of aryl carboxylic acid and metallic salt nucleator and sorbose alcohols nucleator.
4. the polypropylene material of a kind of low-shrinkage wall surface texture excellence according to claim 3, it is characterized in that, described lubricant is the mixture of calcium stearate, metal soap lubricant and TAF.
5. the polypropylene material of a kind of low-shrinkage wall surface texture excellence according to claim 1, it is characterized in that, described nylon viscosity is 1.8-2.5.
6. the polypropylene material of a kind of low-shrinkage wall surface texture excellence according to claim 1, it is characterized in that, the percentage of grafting of described maleic anhydride graft POE is 1.3-1.5%, and melting index is 0.6-2.0g/10min (190 DEG C, 2.16kg).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610003443.5A CN105504511A (en) | 2016-01-05 | 2016-01-05 | Low-shrinkage polypropylene material with excellent wall surface texture |
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| CN201610003443.5A CN105504511A (en) | 2016-01-05 | 2016-01-05 | Low-shrinkage polypropylene material with excellent wall surface texture |
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| CN105504511A true CN105504511A (en) | 2016-04-20 |
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| CN201610003443.5A Pending CN105504511A (en) | 2016-01-05 | 2016-01-05 | Low-shrinkage polypropylene material with excellent wall surface texture |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109721928A (en) * | 2017-10-27 | 2019-05-07 | 中国石油化工股份有限公司 | A kind of polypropene composition and its preparation method and application |
| CN111004430A (en) * | 2018-10-05 | 2020-04-14 | 韩华道达尔有限公司 | High-rigidity composite resin composition having excellent touch and heat resistance, and molded article produced therefrom |
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| CN102040775A (en) * | 2010-12-24 | 2011-05-04 | 洛阳市河之阳高分子材料有限公司 | Flame retardant polypropylene material |
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2016
- 2016-01-05 CN CN201610003443.5A patent/CN105504511A/en active Pending
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| CN109721928A (en) * | 2017-10-27 | 2019-05-07 | 中国石油化工股份有限公司 | A kind of polypropene composition and its preparation method and application |
| CN111004430A (en) * | 2018-10-05 | 2020-04-14 | 韩华道达尔有限公司 | High-rigidity composite resin composition having excellent touch and heat resistance, and molded article produced therefrom |
| CN111004430B (en) * | 2018-10-05 | 2022-08-05 | 韩华道达尔有限公司 | High-rigidity composite resin composition having excellent touch and heat resistance, and molded article produced from same |
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Application publication date: 20160420 |