CN108219266B - It is a kind of eliminate polypropene composition tiger fur line defect method and its preparation polypropene composition - Google Patents
It is a kind of eliminate polypropene composition tiger fur line defect method and its preparation polypropene composition Download PDFInfo
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- CN108219266B CN108219266B CN201611147365.2A CN201611147365A CN108219266B CN 108219266 B CN108219266 B CN 108219266B CN 201611147365 A CN201611147365 A CN 201611147365A CN 108219266 B CN108219266 B CN 108219266B
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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
- 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
-
- 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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- 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
Abstract
The invention discloses a kind of preparation method for eliminating tiger fur line defect polypropene composition and the polypropene compositions of preparation.The polypropene composition includes acrylic resin, toughener, filler, pigment, auxiliary agent, wherein, the low flow polypropylene that the acrylic resin uses melt mass flow rate (MFR) to be 0.1~29g/10min for the high flow polypropylene of 30~120g/10min and melt mass flow rate (MFR) is compounded.Preparation method is designed by screw combinations and procession parameters adjustment enables the polypropene composition of preparation to 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 technique
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
A kind of composite material for eliminating tiger fur line is prepared as tiger fur line remover for the small molecule polypropylene of 1800g/10min, and right
Preparation method has done simple elaboration.CN104558834A disclose a kind of good injection grade high-performance polypropylene compound material and its
Preparation method uses the polypropylene of high fluidity energy polypropylene (40-100g/min) and low flowing (0.5-5g/min) 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 factors in commercial process, therefore for eliminating tiger
The stabilization preparation process of the polypropene composition of dermatoglyph defect needs certain research.
Summary of the invention
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 compositions prepared by the method.
Above-mentioned purpose of the invention is achieved by the following technical programs:
A kind of preparation method for eliminating tiger fur line defect polypropene composition, comprising the following steps:
S1. the raw material of polypropene composition is added twin-screw extrude after mixing；
S2. melting mixing is carried out to said mixture, it is 190~200 DEG C that extruder temperature of each section is identical, screw speed
It is 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, melt flow rate (MFR) be 30~120g/10min high flow polypropylene, 70%~
90%；
Under the conditions of 230 DEG C × 2.16kg, melt flow rate (MFR) be 0.1~29g/10min low flow polypropylene, 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,
36/36, the screw combinations of 45/5/42,45/5/42,36/36,45/5/42,45/5/42,45/5/42 L, mixing dispersion section are suitable
Sequence 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。
Screwing element in extruder screw combination includes delivery element and shearing elements.Delivery element type mainly from
Lead (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 lead, 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, general 4-7 piece, and single-sheet thickness is different.Mainly determined with the angle of each monolithic engagement
Specifications and models, equally also divide positive and negative, can be finely adjusted combination according to the actual situation.The citing of cutout model: 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 that left-hand, special shearing elements have flute profile disk, stretch stream block.From
Screw combinations overall effect sees that single element effect embodiment is unobvious, generally requires in the case where specifically closing on combination condition
Have its true embodiment.
Double screw extruder of the invention include blanking conveying section, fusion plastification section, mixing dispersion section, vacuum evacuation section and
Extrusion builds pressure section, and wherein the 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 loads different screw combinations with mixing dispersion section by the fusion plastification section in extruder screw, passes through screw rod
Combined design, shearing is more uniform, enables material to 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 pass through the uneven of reduction material during subsequent material is molded
Flowing increases merging into each other between different material combination, can eliminate the tiger fur line that material generates in injection moulding process, 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, melt 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 is Hinered phenols or phosphite ester antioxidant, specifically can be model 1010,1076,3114,
168, the mixture of one of PEP-36 or two kinds or more.
The light stabilizer is hindered amine light stabilizer, specifically can be model UV-3808PP5, LA-402XP, LA-
The mixture of one of 402AF or two kinds or more.
The lubricant refers to the common lubricant of the prior art, specially silicone, esters, amides, polyethylene kind,
The mixture of one of stearic acid, fatty acid and esters or two kinds or more.
Compared with prior art, the invention has the following beneficial effects:
High stir-in resin is compounded with low stir-in resin, and there are bigger for the alternate dispersion of the material of two kinds of different mobility
Problem, especially in commercial process, stability is difficult to be guaranteed.Design of the present invention by screw combinations, shearing
It is more uniform, enable material to reduce shearing while effective dispersion, so that the rubber phase particles in component are as far as possible
Greatly, unsetting degree is big as far as possible and is evenly distributed, could be during subsequent material is molded by reducing material not
Uniform Flow increases merging into each other between different material combination, can eliminate the tiger fur line that material generates in injection moulding process,
Promote industrial degree of stability.Prepared polypropene composition can be used in bumper and interior products.
Specific embodiment
Explanation is further expalined to the present invention combined with specific embodiments below, following embodiment is that the present invention is preferable
Embodiment, but embodiments of the present invention are not limited by following embodiments.In every case equivalent substitution or equivalent transformation is used
Form technical solution obtained, should all include within the scope of protection of the claims of 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；PP2 is that commercially available PP resin is low flow polypropylene resin, 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 twin-screw extrude Polypropylene compositions raw material after mixing, select screw combinations 1
Melting mixing is carried out, i.e. the screw combinations sequence of the fusion plastification section of extruder is 45/5/42,45/5/42,36/36,45/5/
42,45/5/42,36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section 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.Extruder temperature of each section 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 twin-screw extrude Polypropylene compositions raw material after mixing, select screw combinations 1
Melting mixing is carried out, i.e. the screw combinations sequence of the fusion plastification section of extruder is 45/5/42,45/5/42,36/36,45/5/
42,45/5/42,36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section 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.Extruder temperature of each section 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 twin-screw extrude Polypropylene compositions raw material after mixing, select screw combinations 1
Melting mixing is carried out, i.e. the screw combinations sequence of the fusion plastification section of extruder is 45/5/42,45/5/42,36/36,45/5/
42,45/5/42,36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section 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.Extruder temperature of each section 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 twin-screw extrude Polypropylene compositions raw material after mixing, select screw combinations 1
Melting mixing is carried out, i.e. the screw combinations sequence of the fusion plastification section of extruder is 45/5/42,45/5/42,36/36,45/5/
42,45/5/42,36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section 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.Extruder temperature of each section 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 twin-screw extrude Polypropylene compositions raw material after mixing, select screw combinations 1
Melting mixing is carried out, i.e. the screw combinations sequence of the fusion plastification section of extruder is 45/5/42,45/5/42,36/36,45/5/
42,45/5/42,36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section 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.Extruder temperature of each section 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 twin-screw extrude Polypropylene compositions raw material after mixing, select screw combinations 1
Melting mixing is carried out, i.e. the screw combinations sequence of the fusion plastification section of extruder is 45/5/42,45/5/42,36/36,45/5/
42,45/5/42,36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section 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.Extruder temperature of each section 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 twin-screw extrude Polypropylene compositions raw material after mixing, select screw combinations 2
Melting mixing is carried out, i.e. the screw combinations sequence of the fusion plastification section of extruder is 45/5/42,45/5/42,36/36,45/5/
42, the screw combinations sequence of 90/5/42,45/5/27,45/5/27 L, mixing dispersion section are 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.Extruder temperature of each section is 190 DEG C, and screw speed is 400 revs/min, and extruding pelletization obtains
To polypropene composition.
Comparative example 2
It is matched by table 1 and adds twin-screw extrude Polypropylene compositions raw material after mixing, select screw combinations 3
Melting mixing is carried out, i.e. the screw combinations sequence of the fusion plastification section of extruder is 45/5/42,45/5/42,36/36,45/5/
42,90/5/42,36/36,45/5/42,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence that mixing disperses section are
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.Extruder temperature of each section is 190 DEG C, and screw speed is 400 revs/min, and extruding pelletization obtains Polypropylene compositions
Object.
Comparative example 3
It is matched by table 1 and adds twin-screw extrude Polypropylene compositions raw material after mixing, select screw combinations 1
Melting mixing is carried out, i.e. the screw combinations sequence of the fusion plastification section of extruder is 45/5/42,45/5/42,36/36,45/5/
42,45/5/42,36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section 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.Extruder temperature of each section 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 twin-screw extrude Polypropylene compositions raw material after mixing, select screw combinations 1
Melting mixing is carried out, i.e. the screw combinations sequence of the fusion plastification section of extruder is 45/5/42,45/5/42,36/36,45/5/
42,45/5/42,36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section 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.Extruder temperature of each section 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 twin-screw extrude Polypropylene compositions raw material after mixing, select screw combinations 1
Melting mixing is carried out, i.e. the screw combinations sequence of the fusion plastification section of extruder is 45/5/42,45/5/42,36/36,45/5/
42,45/5/42,36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section 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.Extruder temperature of each section 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 twin-screw extrude Polypropylene compositions raw material after mixing, select screw combinations 1
Melting mixing is carried out, i.e. the screw combinations sequence of the fusion plastification section of extruder is 45/5/42,45/5/42,36/36,45/5/
42,45/5/42,36/36,45/5/42,45/5/42,45/5/42 L, the screw combinations sequence of mixing dispersion section 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.Extruder temperature of each section 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 die
Amount；It is molded long plates of rectangular shape simultaneously and is commented for assessing brave leather pattern effect, brave leather pattern effect using the smooth plates of 108*328mm
Estimate, preferably 1 grade, worst is 5 grades, is given a mark respectively by 3-5 evaluation and test persons and summarizes assessment.Technology stability test, will be identical
Raw material prepare polypropene composition under the same preparation process, injection molding long plates of rectangular shape carries out brave leather pattern effect grading.
(1) it simply supported beam notch impact strength: is tested according to ASTM D256；(2) it bending modulus: is surveyed according to ASTM D790
Examination；(3) melt body flow rate (melting 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
The test of 3 technology stability of table
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
Tiger fur line is effectively eliminated, mechanical property is also declined, and screw combinations 1 can obviously eliminate tiger fur line；Comparative example 3 and embodiment
1 compares, and can be seen that revolving speed raising by the variation of revolving speed and causes tiger fur line defect serious.Comparative example 4 compared with Example 1,
After temperature is higher than 200 DEG C, tiger fur line defect cannot be eliminated.Comparative example 5 and comparative example 6 compared with Example 1, only with low flowing
Polypropylene or high flow polypropylene cannot completely eliminate tiger fur line.
In terms of physical property, the rigidity that ratio increase of the high stir-in resin PP1 in combined system is able to ascend material is (curved
Bent modulus) and tensile strength, but since the winding of the strand 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 component will lead to impact strength increase, and rigidity (bending modulus) and stretching are strong
Degree reduces, while melt flowability is also deteriorated.The mechanical property that different process under same formulation condition is presented also has difference
It is different, and be equally formulated and have performance difference under same process, these can be with the injection molding quality and test macro of test bars
Nominal error it is related.
Screw combinations 1 are the weaker screwing element combination of block shear in embodiment, compared to block shear
Moderate screw combinations 2 and the higher screw combinations 3 of block shear, shearing material that can be more uniform, 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 infused in subsequent material
By reducing the imperfect flow of material during modeling, increases merging into each other between different material combination, object can be eliminated
Expect the tiger fur line generated in injection moulding process, promotes industrial degree of stability.From the point of view of 3 result of table, present invention preparation side
Method technology stability is high, prepares polypropene composition with this method 6 times, brave leather pattern effect is 1 grade.
Claims (9)
1. a kind of preparation method for eliminating tiger fur line defect polypropene composition, which comprises the following steps:
S1. the raw material of polypropene composition is added twin-screw extrude after mixing；
S2. melting mixing is carried out to said mixture, it is 190~200 DEG C that extruder temperature of each section is identical, 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, melt flow rate (MFR) be 30~120g/10min high flow polypropylene, 70%~
90%；
Under the conditions of 230 DEG C × 2.16kg, melt flow rate (MFR) be 0.1~29g/10min low flow polypropylene, 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/
36,45/5/42,45/5/42,36/36,45/5/42,45/5/42,45/5/42L, the screw combinations sequence that mixing disperses 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. eliminating the preparation method of tiger fur line defect polypropene composition according to claim 1, which is characterized in that the increasing
Tough dose is ethylene-butene copolymer and/or ethylene-octene copolymer.
3. eliminating the preparation method of tiger fur line defect polypropene composition according to claim 2, which is characterized in that the increasing
Tough dose of density is 0.85~0.87g/cm3, Tg≤- 50 DEG C, melt flow rate (MFR) is 0.1~2g/ under the conditions of 190 DEG C × 2.16kg
10min。
4. eliminating the preparation method of tiger fur line defect polypropene composition according to claim 1, which is characterized in that described to fill out
Material is one or more of talcum powder, calcium carbonate, wollastonite, whisker, glass fibre.
5. eliminating the preparation method of tiger fur line defect polypropene composition according to claim 1, which is characterized in that the face
Material is carbon black.
6. eliminating the preparation method of tiger fur line defect polypropene composition according to claim 1, which is characterized in that described to help
Agent is antioxidant, light stabilizer, lubricant, nucleating agent.
7. eliminating the preparation method of tiger fur line defect polypropene composition according to claim 6, which is characterized in that described anti-
Oxygen agent is Hinered phenols or phosphite ester antioxidant.
8. eliminating the preparation method of tiger fur line defect polypropene composition according to claim 6, which is characterized in that the light
Stabilizer is hindered amine light stabilizer.
9. eliminating the preparation method of tiger fur line defect polypropene composition according to claim 6, which is characterized in that the profit
Lubrication prescription is one or more of silicone, esters, amides, polyethylene kind, fatty acid and esters.
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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 |
| 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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| CN112552582B (en) * | 2019-09-26 | 2022-10-11 | 合肥杰事杰新材料股份有限公司 | Anti-tiger stripe and high-heat-resistance automobile instrument board material and preparation method and application thereof |
| CN110527194B (en) * | 2019-09-29 | 2022-12-23 | 江阴超润高分子材料有限公司 | Flame-retardant PP and preparation method thereof |
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