CN108219266A - A kind of polypropene composition for the method and its preparation for eliminating polypropene composition tiger fur line defect - Google Patents
A kind of polypropene composition for the method and its preparation for eliminating polypropene composition tiger fur line defect Download PDFInfo
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- CN108219266A CN108219266A CN201611147365.2A CN201611147365A CN108219266A CN 108219266 A CN108219266 A CN 108219266A CN 201611147365 A CN201611147365 A CN 201611147365A CN 108219266 A CN108219266 A CN 108219266A
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- polypropene composition
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- line defect
- tiger fur
- fur line
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
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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
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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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
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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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- 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
- B29C2948/9258—Velocity
- B29C2948/926—Flow or feed rate
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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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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Abstract
The invention discloses a kind of polypropene compositions for the preparation method and preparation for eliminating tiger fur line defect polypropene composition.The polypropene composition includes acrylic resin, toughener, filler, pigment, auxiliary agent, wherein, the acrylic resin uses melt mass flow rate（MFR）High flow polypropylene and melt mass flow rate for 30~120g/10min（MFR）Low flow polypropylene for 0.1~29g/10min is compounded.The polypropene composition that preparation method is designed by screw combinations and prepared by procession parameters adjustment can eliminate tiger fur line, and stable preparation process, favorable repeatability.Polypropene composition prepared by the present invention can be used in bumper and interior products.
Description
Technical field
The present invention relates to high molecular material polypropylene technology field more particularly to a kind of polypropylene for eliminating tiger fur line defect
Composition and preparation method thereof.
Background technology
Polypropylene PP, hemicrystalline plastics have the characteristics that density is low, easy processing, in automotive bumper and interior trim
It is a large amount of to use.However polypropylene material easily generates the open defect of tiger fur line in injection moulding process, influences the appearance effect of product
Fruit and subsequent processing performance.
In order to reduce the tiger fur line defect that material generates in injection moulding process.CN102964686A uses a kind of flow rate
Small molecule polypropylene for 1800g/10min prepares a kind of composite material for eliminating tiger fur line, and right as tiger fur line remover
Preparation method has done simple elaboration.CN104558834A disclose a kind of good injection grade high-performance polypropylene compound material and its
Preparation method uses high fluidity energy polypropylene（40-100g/min）With low flowing（0.5-5g/min）The polypropylene of performance
It is compounded, promotes the molecular weight distribution of material, obtain the excellent PP composite material of mechanical performance.However above-mentioned material is several
Industrialized production scheme is not seen, there are more uncertain factor in commercial process, therefore for eliminating tiger
The stabilization preparation process of the polypropene composition of dermatoglyph defect needs certain research.
Invention content
The purpose of the present invention is overcoming the shortcomings of the prior art, a kind of polypropylene group for eliminating tiger fur line defect is provided
Close the stabilization preparation method of object.
Another object of the present invention is to provide a kind of polypropene composition prepared by the method.
The above-mentioned purpose of the present invention is achieved by the following technical programs：
A kind of preparation method for eliminating tiger fur line defect polypropene composition, includes the following steps：
S1. the raw material of polypropene composition is added in double screw extruder after mixing；
S2. melting mixing is carried out to said mixture, each section of temperature of extruder is identical, is 190~200 DEG C, screw speed 400
~ 600 revs/min；
S3. extruding pelletization；
Polypropylene compositions raw material described in step S1 includes following parts by weight：
50~100 parts of acrylic resin；
10~30 parts of toughener；
0~20 part of filler；
0~2 part of pigment；
0~2 part of auxiliary agent；
Wherein, the acrylic resin is compounded by following component by mass percentage and is made:
Under the conditions of 230 DEG C × 2.16kg, high flow polypropylene of the melt flow rate (MFR) for 30~120g/10min, 70%~90%；
Under the conditions of 230 DEG C × 2.16kg, low flow polypropylene of the melt flow rate (MFR) for 0.1~29g/10min, 10%~30%；
The screw combinations sequence of the fusion plastification section of double screw extruder described in step S2 is 45/5/42,45/5/42,36/
36th, 45/5/42,45/5/42,36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section are
45/5/42、45/5/42、45/5/42、52/52、45/5/42、45/5/42、45/5/42、52/52、36/36、45/5/42、45/
5/42、45/5/42。
Screwing element in extruder screw combination includes delivery element and shearing elements.Delivery element type mainly from
Helical pitch (around the axial length of a circle) and element duration (element axial length) are divided, and can represent this conveying such as 72/36
Element, 72 refer to helical pitch, and 36 be element duration, unit millimeter.Model mainly has 96/96,72/72,56/56,72/32,56/
28、72/36L（L refers to left-hand, and general positive does not indicate）, 56/28L etc..Shearing elements are exactly gear block, are cut by single
Stripping and slicing meshes together, and the piece number is indefinite, and general 4-7 pieces, single-sheet thickness differs.Mainly determined with the angle of each monolithic engagement
Specifications and models, equally also divide positive and negative, and combination can be finely adjusted according to actual conditions.Cutout model is illustrated:In 45/5/56L,
45 refer to 45 degree of tooth matching angle, and 5 be the piece number, and 56 be length, and L refers to left-hand, and special shearing elements have flute profile disk, stretch stream block.From
Screw combinations overall effect sees that single element effect embodies unobvious, generally requires in specific ability under closing on combination condition
Have its true embodiment.
The present invention double screw extruder include blanking transportation section, fusion plastification section, mixing dispersion section, be vacuum-evacuated section and
Extrusion builds pressure section, and the wherein screw combinations of fusion plastification section and mixing dispersion section have shadow to the tiger fur line defect of polypropene composition
It rings.The present invention passes through screw rod by the screw combinations different with mixing dispersion section loading of the fusion plastification section in extruder screw
The design of combination, shearing are more uniform so that material can reduce shearing while effective dispersion so that the rubber in component
Phase particle is big as far as possible, and is uniformly dispersed.High stir-in resin can be pulled together with rubbery system in this way, entire melt system
The inside is not in high flow region and low flow region, could be during subsequent material is molded by reducing the uneven of material
Flowing, merging into each other between increase different material combination, can eliminate the tiger fur line that material generates in injection moulding process, be promoted
Industrial degree of stability.
Toughener refers to the common toughener of the prior art in the Polypropylene compositions raw material, it is preferable that the toughening
Agent is ethylene-butene copolymer and/or ethylene-octene copolymer.
Preferably, the toughener density is 0.85 ~ 0.87g/cm3, Tg≤- 50 DEG C are melted under the conditions of 190 DEG C × 2.16kg
Body flow rate is 0.1 ~ 2 g/10min.
The filler refers to the common filler of the prior art, be specifically as follows talcum powder, calcium carbonate, wollastonite, whisker or
One or both of glass fibre.
The pigment refers to the common filler of the prior art, concretely carbon black.
The auxiliary agent refers to the common auxiliary agent of the prior art, concretely antioxidant, light stabilizer, lubricant, nucleating agent.
The antioxidant be Hinered phenols or phosphite ester kind antioxidant, can be specifically model 1010,1076,3114,
168th, one or two kinds of and above mixture in PEP-36.
The light stabilizer is hindered amine light stabilizer, can be specifically model UV-3808PP5, LA-402XP, LA-
One or two kinds of and above mixture in 402AF.
The lubricant refers to the common lubricant of the prior art, specially silicone, esters, amides, polyethylene kind,
One or two kinds of and above mixture in stearic acid, aliphatic acid and esters.
Compared with prior art, the present invention has the advantages that：
High stir-in resin and low stir-in resin compound, and there are bigger to ask for the alternate dispersion of the materials of two kinds of different mobility
Topic, especially in commercial process, stability is difficult to be guaranteed.The present invention is by the design of screw combinations, and shearing is more
Adding uniformly so that material can reduce shearing while effective dispersion so that the rubber phase particles in component are big as far as possible,
Unsetting degree is big as far as possible and is evenly distributed, could be during subsequent material is molded by reducing the uneven of material
Flowing, merging into each other between increase different material combination, can eliminate the tiger fur line that material generates in injection moulding process, be promoted
Industrial degree of stability.Prepared polypropene composition can be used in bumper and interior products.
Specific embodiment
The present invention is further expalined explanation with reference to specific embodiment, following embodiment is preferable for the present invention
Embodiment, but embodiments of the present invention are not limited by following embodiments.In every case using equivalent substitution or equivalent transformation
The technical solution that is obtained of form, should all be included within the protection domain of the claims in the present invention.
The polypropylene PP1 used is high flow polypropylene resin, supplier Dao Daer, under the conditions of 230 DEG C × 2.16kg,
Melt flow rate (MFR) is 60-120 g/10min；It is low flow polypropylene resin that PP2, which is commercially available PP resins, supplier Ba Sai
You, under the conditions of 230 DEG C × 2.16kg, melt flow rate (MFR) is 1-10 g/10min.
The toughener that the present invention selects is POE, commercially available, and density is 0.85 ~ 0.87 g/cm3, Tg≤- 50 DEG C, 190 DEG C ×
Melt flow rate (MFR) is 0.1 ~ 2 g/10min under the conditions of 2.16kg.
Filler, pigment are the common model of state of the art, and filler of the present invention selects talcum powder, and pigment selects charcoal
It is black；The common antioxidant of selection of auxiliary state of the art, light stabilizer, lubricant, nucleating agent, antioxidant of the present invention are selected
Antioxidant 1010,168, light stabilizer select model UV-3808PP5, and lubricant selects TR-451, and nucleating agent selects HPN-20E.
Embodiment 1
It is matched by table 1 and adds in Polypropylene compositions raw material in double screw extruder after mixing, screw combinations 1 is selected to carry out
The screw combinations sequence of the fusion plastification section of melting mixing, i.e. extruder is 45/5/42,45/5/42,36/36,45/5/42,
45/5/42nd, 36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section is 45/5/42,45/
5/42、45/5/42、52/52、45/5/42、45/5/42、45/5/42、52/52、36/36、45/5/42、45/5/42、45/5/
42.Each section of temperature of extruder is 190 DEG C, and screw speed is 400 revs/min, and extruding pelletization obtains polypropene composition.
Embodiment 2
It is matched by table 1 and adds in Polypropylene compositions raw material in double screw extruder after mixing, screw combinations 1 is selected to carry out
The screw combinations sequence of the fusion plastification section of melting mixing, i.e. extruder is 45/5/42,45/5/42,36/36,45/5/42,
45/5/42nd, 36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section is 45/5/42,45/
5/42、45/5/42、52/52、45/5/42、45/5/42、45/5/42、52/52、36/36、45/5/42、45/5/42、45/5/
42.Each section of temperature of extruder is 200 DEG C, and screw speed is 400 revs/min, and extruding pelletization obtains polypropene composition.
Embodiment 3
It is matched by table 1 and adds in Polypropylene compositions raw material in double screw extruder after mixing, screw combinations 1 is selected to carry out
The screw combinations sequence of the fusion plastification section of melting mixing, i.e. extruder is 45/5/42,45/5/42,36/36,45/5/42,
45/5/42nd, 36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section is 45/5/42,45/
5/42、45/5/42、52/52、45/5/42、45/5/42、45/5/42、52/52、36/36、45/5/42、45/5/42、45/5/
42.Each section of temperature of extruder is 200 DEG C, and screw speed is 600 revs/min, and extruding pelletization obtains polypropene composition.
Embodiment 4
It is matched by table 1 and adds in Polypropylene compositions raw material in double screw extruder after mixing, screw combinations 1 is selected to carry out
The screw combinations sequence of the fusion plastification section of melting mixing, i.e. extruder is 45/5/42,45/5/42,36/36,45/5/42,
45/5/42nd, 36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section is 45/5/42,45/
5/42、45/5/42、52/52、45/5/42、45/5/42、45/5/42、52/52、36/36、45/5/42、45/5/42、45/5/
42.Each section of temperature of extruder is 190 DEG C, and screw speed is 400 revs/min, and extruding pelletization obtains polypropene composition.
Embodiment 5
It is matched by table 1 and adds in Polypropylene compositions raw material in double screw extruder after mixing, screw combinations 1 is selected to carry out
The screw combinations sequence of the fusion plastification section of melting mixing, i.e. extruder is 45/5/42,45/5/42,36/36,45/5/42,
45/5/42nd, 36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section is 45/5/42,45/
5/42、45/5/42、52/52、45/5/42、45/5/42、45/5/42、52/52、36/36、45/5/42、45/5/42、45/5/
42.Each section of temperature of extruder is 200 DEG C, and screw speed is 400 revs/min, and extruding pelletization obtains polypropene composition.
Embodiment 6
It is matched by table 1 and adds in Polypropylene compositions raw material in double screw extruder after mixing, screw combinations 1 is selected to carry out
The screw combinations sequence of the fusion plastification section of melting mixing, i.e. extruder is 45/5/42,45/5/42,36/36,45/5/42,
45/5/42nd, 36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section is 45/5/42,45/
5/42、45/5/42、52/52、45/5/42、45/5/42、45/5/42、52/52、36/36、45/5/42、45/5/42、45/5/
42.Each section of temperature of extruder is 200 DEG C, and screw speed is 600 revs/min, and extruding pelletization obtains polypropene composition.
Comparative example 1
It is matched by table 1 and adds in Polypropylene compositions raw material in double screw extruder after mixing, screw combinations 2 is selected to carry out
The screw combinations sequence of the fusion plastification section of melting mixing, i.e. extruder is 45/5/42,45/5/42,36/36,45/5/42,
90/5/42nd, 45/5/27,45/5/27 L, the screw combinations sequence of mixing dispersion section is 45/5/42,90/5/42,45/5/27,
45/5/27 L、52/52、36/36、45/5/42、90/5/42、45/5/27、45/5/27 L、52/52、52/52、52/52、45/
5/42、45/5/42、45/5/42.Each section of temperature of extruder is 190 DEG C, and screw speed is 400 revs/min, and extruding pelletization is gathered
Propylene compositions.
Comparative example 2
It is matched by table 1 and adds in Polypropylene compositions raw material in double screw extruder after mixing, screw combinations 3 is selected to carry out
The screw combinations sequence of the fusion plastification section of melting mixing, i.e. extruder is 45/5/42,45/5/42,36/36,45/5/42,
90/5/42nd, 36/36,45/5/42,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section is 45/
5/42、90/5/42、45/5/42 L、52/52、45/5/42、45/5/42、45/5/42 L、52/52、36/36、45/5/42、
45/5/42 L.Each section of temperature of extruder is 190 DEG C, and screw speed is 400 revs/min, and extruding pelletization obtains polypropene composition.
Comparative example 3
It is matched by table 1 and adds in Polypropylene compositions raw material in double screw extruder after mixing, screw combinations 1 is selected to carry out
The screw combinations sequence of the fusion plastification section of melting mixing, i.e. extruder is 45/5/42,45/5/42,36/36,45/5/42,
45/5/42nd, 36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section is 45/5/42,45/
5/42、45/5/42、52/52、45/5/42、45/5/42、45/5/42、52/52、36/36、45/5/42、45/5/42、45/5/
42.Each section of temperature of extruder is 190 DEG C, and screw speed is 800 revs/min, and extruding pelletization obtains polypropene composition.
Comparative example 4
It is matched by table 1 and adds in Polypropylene compositions raw material in double screw extruder after mixing, screw combinations 1 is selected to carry out
The screw combinations sequence of the fusion plastification section of melting mixing, i.e. extruder is 45/5/42,45/5/42,36/36,45/5/42,
45/5/42nd, 36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section is 45/5/42,45/
5/42、45/5/42、52/52、45/5/42、45/5/42、45/5/42、52/52、36/36、45/5/42、45/5/42、45/5/
42.Each section of temperature of extruder is 210 DEG C, and screw speed is 400 revs/min, and extruding pelletization obtains polypropene composition.
Comparative example 5
It is matched by table 1 and adds in Polypropylene compositions raw material in double screw extruder after mixing, screw combinations 1 is selected to carry out
The screw combinations sequence of the fusion plastification section of melting mixing, i.e. extruder is 45/5/42,45/5/42,36/36,45/5/42,
45/5/42nd, 36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section is 45/5/42,45/
5/42、45/5/42、52/52、45/5/42、45/5/42、45/5/42、52/52、36/36、45/5/42、45/5/42、45/5/
42.Each section of temperature of extruder is 190 DEG C, and screw speed is 400 revs/min, and extruding pelletization obtains polypropene composition.
Comparative example 6
It is matched by table 1 and adds in Polypropylene compositions raw material in double screw extruder after mixing, screw combinations 1 is selected to carry out
The screw combinations sequence of the fusion plastification section of melting mixing, i.e. extruder is 45/5/42,45/5/42,36/36,45/5/42,
45/5/42nd, 36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section is 45/5/42,45/
5/42、45/5/42、52/52、45/5/42、45/5/42、45/5/42、52/52、36/36、45/5/42、45/5/42、45/5/
42.Each section of temperature of extruder is 190 DEG C, and screw speed is 400 revs/min, and extruding pelletization obtains polypropene composition.
Performance evaluation mode and implementation standard：
The polypropene composition of preparation is molded mechanics batten, for testing its simply supported beam notch impact strength and bending modulus；
It is molded long plates of rectangular shape simultaneously for assessing brave leather pattern effect, brave leather pattern effect is assessed using the smooth plates of 108*328mm,
Preferably 1 grade, worst is 5 grades, is given a mark respectively by 3-5 evaluation and test persons and summarizes assessment.Technology stability is tested, by identical original
Material prepares polypropene composition under same preparation process, and injection long plates of rectangular shape carries out brave leather pattern effect grading.
（1）Simply supported beam notch impact strength：It is tested according to ASTM D256；（2）Bending modulus：It is surveyed according to ASTM D790
Examination；(3) melt body flow rate（Melt finger）, ASTM D1238.
Obtained performance parameter is tested as shown in table 2, table 3.
The formula and preparation method of the polypropene composition of 1 embodiment and comparative example of table
The performance test of the polypropene composition of 2 embodiment and comparative example of table
3 technology stability of table is tested
It can be obtained by test result in table 2：Compared with embodiment 1, the screw combinations 2 and 3 that comparative example 1,2 uses cannot be effective
Tiger fur line is eliminated, mechanical property is also declined, and screw combinations 1 can significantly eliminate tiger fur line；Comparative example 3 and 1 phase of embodiment
Than can be seen that rotating speed raising by the variation of rotating speed and cause tiger fur line defect serious.Comparative example 4 is compared with Example 1, warm
After degree is higher than 200 DEG C, tiger fur line defect cannot be eliminated.Comparative example 5 and comparative example 6 are compared with Example 1, poly- only with low flowing
Propylene or high flow polypropylene, it is impossible to completely eliminate tiger fur line.
In terms of physical property, the rigidity of improving material is capable of in ratio increases of the high stir-in resin PP1 in combined system（It is curved
Bent modulus）And tensile strength, but since the strand winding of high flowing copolymer tails off, the pulling force of molecule interchain reduces, and makes
Obtaining its impact strength can reduce；The content increase of PP2 components can cause impact strength to increase, rigidity（Bending modulus）It is strong with stretching
Degree reduces, while melt flowability is also deteriorated.The mechanical property that different process under similary formulation condition is presented also has difference
It is different, and be equally formulated and performance difference is had under same process, these can be with the injection quality of test bars and test system
Nominal error it is related.
The screwing element combination weaker for block shear of screw combinations 1 in embodiment, compared to block shear
Moderate screw combinations 2 and the higher screw combinations 3 of block shear, can more uniformly shear material so that material
Shearing can be reduced while effective dispersion so that the rubber phase particles in component are big as far as possible, by high stir-in resin with
Rubbery system is pulled together, and is not in high flow region and low flow region inside entire melt system, could be noted in subsequent material
By reducing the imperfect flow of material during modeling, merging into each other between increase different material combination can eliminate object
Expect the tiger fur line generated in injection moulding process, promote industrial degree of stability.From the point of view of 3 result of table, preparation side of the invention
Method technology stability is high, prepares polypropene composition 6 times with this method, brave leather pattern effect is 1 grade.
Claims (10)
1. a kind of preparation method for eliminating tiger fur line defect polypropene composition, which is characterized in that include the following steps：
S1. the raw material of polypropene composition is added in double screw extruder after mixing；
S2. melting mixing is carried out to said mixture, each section of temperature of extruder is identical, is 190~200 DEG C, screw speed 400
~ 600 revs/min；
S3. extruding pelletization；
Polypropylene compositions raw material described in step S1 includes following parts by weight：
50~100 parts of acrylic resin；
10~30 parts of toughener；
0~20 part of filler；
0~2 part of pigment；
0~2 part of auxiliary agent；
Wherein, the acrylic resin is compounded by following component by mass percentage and is made:
Under the conditions of 230 DEG C × 2.16kg, high flow polypropylene of the melt flow rate (MFR) for 30~120 g/10min, 70%~90%；
Under the conditions of 230 DEG C × 2.16kg, low flow polypropylene of the melt flow rate (MFR) for 0.1~29g/10min, 10%~30%；
The screw combinations sequence of the fusion plastification section of double screw extruder described in step S2 is 45/5/42,45/5/42,36/
36th, 45/5/42,45/5/42,36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section are
45/5/42、45/5/42、45/5/42、52/52、45/5/42、45/5/42、45/5/42、52/52、36/36、45/5/42、45/
5/42、45/5/42。
2. the preparation method of tiger fur line defect polypropene composition is eliminated according to claim 1, which is characterized in that the increasing
Tough dose is ethylene-butene copolymer and/or ethylene-octene copolymer.
3. the preparation method of tiger fur line defect polypropene composition is eliminated according to claim 2, which is characterized in that described
Toughener density is 0.85 ~ 0.87 g/cm3, Tg≤- 50 DEG C, melt flow rate (MFR) is 0.1 ~ 2 under the conditions of 190 DEG C × 2.16kg
g/10min。
4. the preparation method of tiger fur line defect polypropene composition is eliminated according to claim 1, which is characterized in that described to fill out
Expect for one or more of talcum powder, calcium carbonate, wollastonite, whisker, glass fibre.
5. the preparation method of tiger fur line defect polypropene composition is eliminated according to claim 1, which is characterized in that the face
Expect for carbon black.
6. the preparation method of tiger fur line defect polypropene composition is eliminated according to claim 1, which is characterized in that described to help
Agent is antioxidant, light stabilizer, lubricant, nucleating agent.
7. the preparation method of tiger fur line defect polypropene composition is eliminated according to claim 6, which is characterized in that described anti-
Oxygen agent is Hinered phenols or phosphite ester kind antioxidant.
8. the preparation method of tiger fur line defect polypropene composition is eliminated according to claim 6, which is characterized in that the light
Stabilizer is hindered amine light stabilizer.
9. the preparation method of tiger fur line defect polypropene composition is eliminated according to claim 6, which is characterized in that the profit
Lubrication prescription is one or more of silicone, esters, amides, polyethylene kind, stearic acid, aliphatic acid and esters.
10. a kind of elimination tiger fur line defect polypropene composition prepared by the method as described in claim 1.
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| PCT/CN2017/112492 WO2018107950A1 (en) | 2016-12-13 | 2017-11-23 | Method for eliminating tiger stripe defect from polypropylene composition and polypropylene composition prepared by same |
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| CN201611147365.2A CN108219266B (en) | 2016-12-13 | 2016-12-13 | It is a kind of eliminate polypropene composition tiger fur line defect method and its preparation polypropene composition |
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| CN108219266B (en) | 2019-11-26 |
| WO2018107950A1 (en) | 2018-06-21 |
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