CN109880146A - A kind of preparation method of tenacity-increased profax expanded bead - Google Patents
A kind of preparation method of tenacity-increased profax expanded bead Download PDFInfo
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- CN109880146A CN109880146A CN201910141600.2A CN201910141600A CN109880146A CN 109880146 A CN109880146 A CN 109880146A CN 201910141600 A CN201910141600 A CN 201910141600A CN 109880146 A CN109880146 A CN 109880146A
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Abstract
The present invention relates to a kind of preparation methods of tenacity-increased profax expanded bead, belong to expanded polypropylene beads preparation technical field.General expanded polypropylene beads are different from, POE is coated to the surface PP by way of coextrusion by the present invention, is adjusted thickness of the coextrusion feeding than controlling cortex POE, is prepared polypropylene foaming beads using Supercritical carbon dioxide kettle formula foaming.The present invention, by elastomer uniform fold in pp material surface, improves the permanent compression set and bending strength of expanded polypropylene beads by way of coextrusion；In addition, in the cold north, conventional polypropylene product tends to embrittlement, life of product is caused to reduce since polyolefin elastomer glass transition temperature is lower；And surface has coated the polypropylene foaming beads of POE, due to the presence of elastomer, its room temperature ability to bear is generally capable of up to -30 DEG C to -40 DEG C, substantially increases application field, space and the service life of polypropylene foaming beads, improves the apparent toughness of polypropylene bead.
Description
Technical field
The present invention relates to a kind of preparation methods of tenacity-increased profax expanded bead, belong to expanded polypropylene beads technology of preparing
Field.
Background technique
PP foam material is itself expansion by polypropylene in processing and forming, is keeping materials'use performance
Meanwhile a kind of new technique of density of material is greatly reduced.The gases such as supercritical carbon dioxide, supercritical nitrogen, pentane are ratios
The more typical medium for preparing expanded polypropylene material, wherein supercritical carbon dioxide is excellent at pore property, environment parent with its
With the advantages such as property, easy to produce, it is widely used in the preparation of polypropylene foaming beads.
Polypropylene foaming beads product density can be from 10-200g/L etc., and convenient for packing transport, application range is very wide
It is general, its figure can be seen in packaging industry, automotive field, space industry etc., and is constantly being expanded.But polypropylene material has
One fatal disadvantage is exactly that material cold resistance itself is poor, in winter in the north, when outdoor temperature is lower than 0 DEG C, system
Part is easy embrittlement in use, shows as freezing crack, which has limited the uses of polypropylene material.In order to make up it not
Foot, often through the form of compounding in processing industry, introduced into polypropylene flexible preferably high molecular material (such as: elastomer,
Polyethylene, high polymer alloy etc.), but this generally results in the variation of former Pp System rigidity, leads to surface hardness decline, draws
The side effects such as intensity variation are stretched, are showed in foamed material particularly evident.
In general, modified polypropene toughness obtained can be improved by elastomer and polypropylene plastics simple blend, but
The decline of its intensity is obvious；Using the method for coextrusion, elastomer is coated on polypropylene surface, forms the product of nucleocapsid structure,
The toughness and rigidity of product can be combined, the elastomer cortex of outer layer provides good resilience and temperature tolerance, internal
Polypropylene nuclear energy enough make particle just obtain best embodiment, realize so-called " coupling hardness with softness ".
Summary of the invention
The purpose of the present invention is overcoming above-mentioned shortcoming, a kind of preparation method of tenacity-increased profax expanded bead is provided.
Technical solution of the present invention, a kind of preparation method of tenacity-increased profax expanded bead, step are as follows:
(1) preparation of polypropylene mixing section: by polypropylene, Nucleating Agent and stabilizer by screw mixing, it is kneaded temperature
160-200 DEG C of degree, revolving speed 500-1500r/h obtains polypropylene mixing section；
(2) preparation of polyolefin elastomer mixing section: by polypropylene elastomer, polypropylene, Nucleating Agent, stabilizer and
For toner by screw mixing, melting temperature is 100-150 DEG C, revolving speed 300-1000r/h, obtains polyolefin elastomer mixing
Section；
(3) it coats the preparation of polypropylene microparticle: step (1) being prepared into resulting polypropylene mixing section and is prepared by step (2)
Resulting polyolefin elastomer mixing section is brought together by center mouth mold, by adjusting rear draw ratio and cooling water
Polyolefin elastomer mixing section is uniformly coated on the outside of polypropylene mixing section by temperature, is then quickly cut strand by pelleter
It is cut into cladding polypropylene microparticle；
(4) preparation of tenacity-increased profax expanded bead: step (3) is prepared into resulting cladding polypropylene microparticle and water is put into
In reaction kettle, by supplement carbon dioxide and steam-heated mode, pressure and temperature in kettle are slowly improved, until anxious after blow point
Fast pressure release obtains the tenacity-increased profax expanded bead of different multiplying by the natural expansion of particle.
Further, the polypropylene is random Propylene polymerization polypropylene, ethylene contents 2%-3% by weight.
Further, the polyolefin elastomer shore hardness is 60-90A, mass fraction of ethylene 40%-60%, low
Warm brittleness≤- 40 DEG C, melt index 4-20g/10min, 230 DEG C, 2.16kg.
Further, it is inorganic filler between 10-40 μm that the Nucleating Agent, which is partial size,；Specially zinc borate, two
One or more of silica, titanium dioxide, calcium carbonate or talcum powder.
Further, the stabilizer is specially antioxidant 1010, irgasfos 168, antioxidant 1076, ultraviolet absorbing agent
Or one or more of light stabilizer.
Step (1) specific steps by weight are as follows: by 90-95 parts of polypropylene, 2-3 parts of Nucleating Agent, stabilizer 1-3
Part by screw mixing, 160-200 DEG C of processing temperature, extruder revolving speed 500-1500r/h.
Step (2) specific steps by weight are as follows: take 80~90 parts of polyolefin elastomer, 5-10 parts of polypropylene, abscess
2-3 parts of nucleating agent, 1-3 parts of stabilizer, 4-8 parts of toner by screw mixing, 100-150 DEG C of processing temperature, revolving speed 300-
1000r/h。
Step (1) is prepared into resulting polypropylene mixing section and step (2) prepare resulting polyolefin elastomer mixing section
It is brought together by center mouth mold；At mouth mold convergence, polypropylene section pan feeding rate V1With polyolefin elastomer section pan feeding rate V2
Control is in V1:V2=1:20~10, for adjusting elastomer skin thickness, elastomer skin thickness is controlled in system 5%-10%,
Draw-down rate control in rear controls at 30-60 DEG C in 2-4m/s, coolant water temperature, polyolefin elastomer mixing section is uniformly coated to
On the outside of polypropylene mixing section, then pass through pelleter for strand fly-cutting into cladding polypropylene microparticle；Pelletizing Weight control exists
1-2mg, length are controlled in 1-2mm.
Step (3) is prepared into resulting polypropylene microparticle and water in the ratio investment reaction kettle of 1:2-180, passes through supplement
The carbon dioxide and 150-170 DEG C of steam-heated mode that flow velocity is 2-5t/h slowly improve pressure and temperature in kettle, specific to press
Power is 1-4MPa, and temperature is 150-160 DEG C, until rapidly pressure release after blow point, different needed for obtaining by the natural expansion of particle
The tenacity-increased profax expanded bead of multiplying power.
The method prepares resulting tenacity-increased profax expanded bead, and using PP as kernel, external sheath POE is formed,
It is 5%-10% that middle POE cortex, which accounts for tenacity-increased profax expanded bead mass ratio,.
Resulting tenacity-increased profax expanded bead is nucleocapsid structure.The present invention forms nucleocapsid structure using PP/POE, mentions
While the toughness of high polypropylene matrix, its permanent compression set amount is reduced, its service life and use space are improved；Equally
, elastomer can be EPDM/EPR etc. with appropriate adjustment, adjust it and compound ratio, can achieve same toughening effect.In addition, cutting
Underwater cutpellet progress can also be used in grain mode, and effect is identical；
POE is coated to the surface PP by way of coextrusion by the present invention, adjusts coextrusion feeding than control cortex POE's
Thickness prepares polypropylene foaming beads using Supercritical carbon dioxide kettle formula foaming.The present invention can assign the rebound of polypropylene height
Effect, improve the permanent compression set and bending strength of expanded polypropylene beads；In addition, due to polyolefin elastomer vitrifying
Temperature is lower, and in the cold north (room temperature≤- 20 DEG C), conventional polypropylene product tends to embrittlement, life of product is caused to drop
Low, application environment is general；And surface has coated the polypropylene foaming beads of POE, due to the presence of elastomer, room temperature bears energy
Power is generally capable of up to -30 DEG C to -40 DEG C, substantially increases application field, space and the service life of polypropylene foaming beads, improves
The apparent toughness of polypropylene bead.Product totally embodies a kind of performance coupled hardness with softness, and has both possessed the intensity of polypropylene matrix,
The toughness and resilience of polyolefin elastomer are imparted again.
Beneficial effects of the present invention: the present invention use with the preferable polyolefin elastomer of polypropylene compatible to its into
Row coextrusion cladding, using the physical property that elastomer is excellent, can reduce the brittleness that its low temperature is cashed out, widens its use
Temperature range；In addition, polyolefin elastomer is coated on polypropylene surface, forms nucleocapsid structure by way of coextrusion,
The toughness that can be improved polypropylene matrix reduces the permanent compression set of polypropylene matrix, improves its bending strength, is had both
Polypropylene expanded product rigid and flexible.
Detailed description of the invention
Fig. 1 is PP/POE nucleocapsid structure figure of the present invention.
Specific embodiment
Embodiment 1
(1) preparation of polypropylene mixing section: 97 parts of polypropylene, 2 parts of Nucleating Agent, 1 part of stabilizer are mixed by screw rod
Refining, 200 DEG C of processing temperature, extruder revolving speed 1300r/h.
(2) 80 parts of polyolefin elastomer, 10 parts of polypropylene, Nucleating Agent 2 preparation of polyolefin elastomer mixing section: are taken
Part, 2 parts of stabilizer, 2 parts of toner by screw mixing, 140 DEG C of processing temperature, revolving speed 800r/h.
(3) it coats the preparation of polypropylene microparticle: step (1) being prepared into resulting polypropylene mixing section and is prepared by step (2)
Resulting polyolefin elastomer mixing section is brought together by center mouth mold；At mouth mold convergence, polypropylene section pan feeding rate V1
With polyolefin elastomer section pan feeding rate V2Control is in V2:V1=20:1, for adjusting elastomer skin thickness, elastomer cortex
Thickness control controls at 30 DEG C in 2m/s, coolant water temperature in system 1%, the control of rear draw-down rate, polyolefin elastomer is mixed
Refining section is uniformly coated on the outside of polypropylene mixing section, then passes through pelleter for strand fly-cutting into cladding polypropylene microparticle；
Pelletizing Weight control is controlled in 1mg, length in 1mm.
(4) step (3) preparation of tenacity-increased profax expanded bead: is prepared into resulting polypropylene microparticle and water by 1:180
Ratio investment reaction kettle in, by supplement flow velocity be 5t/h carbon dioxide and 150 DEG C of steam-heated modes, slowly raising
Pressure and temperature in kettle, specific pressure are 1.9MPa, and temperature is 149 DEG C, until rapidly pressure release after blow point, passes through the nature of particle
Expansion, the tenacity-increased profax expanded bead of different multiplying needed for obtaining.
It counts in mass ratio, preparing PP resin content in resulting tenacity-increased profax expanded bead is 98%, and elastomer POE contains
Amount is 1%.Mechanical property is as shown in table 1.
Embodiment 2
(1) preparation of polypropylene mixing section: 97 parts of polypropylene, 2 parts of Nucleating Agent, 1 part of stabilizer are mixed by screw rod
Refining, 200 DEG C of processing temperature, extruder revolving speed 1300r/h.
(2) 80 parts of polyolefin elastomer, 10 parts of polypropylene, Nucleating Agent 2 preparation of polyolefin elastomer mixing section: are taken
Part, 2 parts of stabilizer, 2 parts of toner by screw mixing, 140 DEG C of processing temperature, revolving speed 800r/h.
(3) it coats the preparation of polypropylene microparticle: step (1) being prepared into resulting polypropylene mixing section and is prepared by step (2)
Resulting polyolefin elastomer mixing section is brought together by center mouth mold；At mouth mold convergence, polypropylene section pan feeding rate V1
With polyolefin elastomer section pan feeding rate V2Control is in V2:V1=15:1, for adjusting elastomer skin thickness, elastomer cortex
Thickness control controls at 40 DEG C in 3m/s, coolant water temperature in system 5%, the control of rear draw-down rate, polyolefin elastomer is mixed
Refining section is uniformly coated on the outside of polypropylene mixing section, then passes through pelleter for strand fly-cutting into cladding polypropylene microparticle；
Pelletizing Weight control is controlled in 2mg, length in 1mm.
(4) step (3) preparation of tenacity-increased profax expanded bead: is prepared into resulting polypropylene microparticle and water by 1:180
Ratio investment reaction kettle in, by supplement flow velocity be 3t/h carbon dioxide and 160 DEG C of steam-heated modes, slowly raising
Pressure and temperature in kettle, specific pressure are 2.3MPa, temperature is 148.5 DEG C, until rapidly pressure release after blow point, by particle from
So expansion, the tenacity-increased profax expanded bead of different multiplying needed for obtaining.
It counts in mass ratio, preparing PP resin content in resulting tenacity-increased profax expanded bead is 93%, and elastomer POE contains
Amount is 5%.Mechanical property is as shown in table 1.
Embodiment 3
(1) preparation of polypropylene mixing section: 97 parts of polypropylene, 2 parts of Nucleating Agent, 1 part of stabilizer are mixed by screw rod
Refining, 200 DEG C of processing temperature, extruder revolving speed 1300r/h.
(2) 80 parts of polyolefin elastomer, 10 parts of polypropylene, Nucleating Agent 2 preparation of polyolefin elastomer mixing section: are taken
Part, 2 parts of stabilizer, 2 parts of toner by screw mixing, 140 DEG C of processing temperature, revolving speed 800r/h.
(3) it coats the preparation of polypropylene microparticle: step (1) being prepared into resulting polypropylene mixing section and is prepared by step (2)
Resulting polyolefin elastomer mixing section is brought together by center mouth mold；At mouth mold convergence, polypropylene section pan feeding rate V1
With polyolefin elastomer section pan feeding rate V2Control is in V2:V1=10:1, for adjusting elastomer skin thickness, elastomer cortex
Thickness control controls at 30 DEG C in 3m/s, coolant water temperature in system 10%, the control of rear draw-down rate, polyolefin elastomer is mixed
Refining section is uniformly coated on the outside of polypropylene mixing section, then passes through pelleter for strand fly-cutting into cladding polypropylene microparticle；
Pelletizing Weight control is controlled in 1mg, length in 1mm.
(4) step (3) preparation of tenacity-increased profax expanded bead: is prepared into resulting polypropylene microparticle and water by 1:150
Ratio investment reaction kettle in, by supplement flow velocity be 3t/h carbon dioxide and 150 DEG C of steam-heated modes, slowly raising
Pressure and temperature in kettle, specific pressure are 2.1MPa, and temperature is 147 DEG C, until rapidly pressure release after blow point, passes through the nature of particle
Expansion, the tenacity-increased profax expanded bead of different multiplying needed for obtaining.
It counts in mass ratio, preparing PP resin content in resulting tenacity-increased profax expanded bead is 88%, and elastomer POE contains
Amount is 10%.Mechanical property is as shown in table 1.
Embodiment 4
(1) preparation of polypropylene mixing section: 94 parts of polypropylene, 3 parts of Nucleating Agent, 3 parts of stabilizer are mixed by screw rod
Refining, 200 DEG C of processing temperature, extruder revolving speed 1000r/h.
(2) 90 parts of polyolefin elastomer, 5 parts of polypropylene, Nucleating Agent 1 preparation of polyolefin elastomer mixing section: are taken
Part, 1 part of stabilizer, 3 parts of toner by screw mixing, 140 DEG C of processing temperature, revolving speed 900r/h.
(3) it coats the preparation of polypropylene microparticle: step (1) being prepared into resulting polypropylene mixing section and is prepared by step (2)
Resulting polyolefin elastomer mixing section is brought together by center mouth mold；At mouth mold convergence, polypropylene section pan feeding rate V1
With polyolefin elastomer section pan feeding rate V2Control is in V2:V1=20:1, for adjusting elastomer skin thickness, elastomer cortex
Thickness control controls at 30 DEG C in 2m/s, coolant water temperature in system 1%, the control of rear draw-down rate, polyolefin elastomer is mixed
Refining section is uniformly coated on the outside of polypropylene mixing section, then passes through pelleter for strand fly-cutting into cladding polypropylene microparticle；
Pelletizing Weight control is controlled in 1mg, length in 1mm.
(4) step (3) preparation of tenacity-increased profax expanded bead: is prepared into resulting polypropylene microparticle and water by 1:180
Ratio investment reaction kettle in, by supplement flow velocity be 5t/h carbon dioxide and 150 DEG C of steam-heated modes, slowly raising
Pressure and temperature in kettle, specific pressure are 1.95MPa, temperature is 149 DEG C, until rapidly pressure release after blow point, by particle from
So expansion, the tenacity-increased profax expanded bead of different multiplying needed for obtaining.
It counts in mass ratio, preparing PP resin content in resulting tenacity-increased profax expanded bead is 98%, and elastomer POE contains
Amount is 1%.Mechanical property is as shown in table 1.
Embodiment 5
(1) preparation of polypropylene mixing section: 94 parts of polypropylene, 3 parts of Nucleating Agent, 3 parts of stabilizer are mixed by screw rod
Refining, 200 DEG C of processing temperature, extruder revolving speed 1000r/h.
(2) 85 parts of polyolefin elastomer, 5 parts of polypropylene, Nucleating Agent 3 preparation of polyolefin elastomer mixing section: are taken
Part, 3 parts of stabilizer, 4 parts of toner by screw mixing, 140 DEG C of processing temperature, revolving speed 800r/h.
(3) it coats the preparation of polypropylene microparticle: step (1) being prepared into resulting polypropylene mixing section and is prepared by step (2)
Resulting polyolefin elastomer mixing section is brought together by center mouth mold；At mouth mold convergence, polypropylene section pan feeding rate V1
With polyolefin elastomer section pan feeding rate V2Control is in V2:V1=15:1, for adjusting elastomer skin thickness, elastomer cortex
Thickness control controls at 40 DEG C in 3m/s, coolant water temperature in system 5%, the control of rear draw-down rate, polyolefin elastomer is mixed
Refining section is uniformly coated on the outside of polypropylene mixing section, then passes through pelleter for strand fly-cutting into cladding polypropylene microparticle；
Pelletizing Weight control is controlled in 2mg, length in 1mm.
(4) step (3) preparation of tenacity-increased profax expanded bead: is prepared into resulting polypropylene microparticle and water by 1:180
Ratio investment reaction kettle in, by supplement flow velocity be 3t/h carbon dioxide and 160 DEG C of steam-heated modes, slowly raising
Pressure and temperature in kettle, specific pressure are 2MPa, and temperature is 148.5 DEG C, until rapidly pressure release after blow point, passes through the nature of particle
Expansion, the tenacity-increased profax expanded bead of different multiplying needed for obtaining.
It counts in mass ratio, preparing PP resin content in resulting tenacity-increased profax expanded bead is 93%, and elastomer POE contains
Amount is 5%.Mechanical property is as shown in table 1.
Embodiment 6
(1) preparation of polypropylene mixing section: 94 parts of polypropylene, 3 parts of Nucleating Agent, 3 parts of stabilizer are mixed by screw rod
Refining, 200 DEG C of processing temperature, extruder revolving speed 1000r/h.
(2) 85 parts of polyolefin elastomer, 5 parts of polypropylene, Nucleating Agent 3 preparation of polyolefin elastomer mixing section: are taken
Part, 3 parts of stabilizer, 4 parts of toner by screw mixing, 140 DEG C of processing temperature, revolving speed 800r/h.
(3) it coats the preparation of polypropylene microparticle: step (1) being prepared into resulting polypropylene mixing section and is prepared by step (2)
Resulting polyolefin elastomer mixing section is brought together by center mouth mold；At mouth mold convergence, polypropylene section pan feeding rate V1
With polyolefin elastomer section pan feeding rate V2Control is in V2:V1=10:1, for adjusting elastomer skin thickness, elastomer cortex
Thickness control controls at 30 DEG C in 3m/s, coolant water temperature in system 10%, the control of rear draw-down rate, polyolefin elastomer is mixed
Refining section is uniformly coated on the outside of polypropylene mixing section, then passes through pelleter for strand fly-cutting into cladding polypropylene microparticle；
Pelletizing Weight control is controlled in 1mg, length in 1mm.
(4) step (3) preparation of tenacity-increased profax expanded bead: is prepared into resulting polypropylene microparticle and water by 1:150
Ratio investment reaction kettle in, by supplement flow velocity be 3t/h carbon dioxide and 150 DEG C of steam-heated modes, slowly raising
Pressure and temperature in kettle, specific pressure are 2.05MPa, temperature is 148 DEG C, until rapidly pressure release after blow point, by particle from
So expansion, the tenacity-increased profax expanded bead of different multiplying needed for obtaining.
It counts in mass ratio, preparing PP resin content in resulting tenacity-increased profax expanded bead is 88%, and elastomer POE contains
Amount is 10%.Mechanical property is as shown in table 1.
Embodiment 7
(1) preparation of polypropylene mixing section: 95 parts of polypropylene, 3 parts of Nucleating Agent, 2 parts of stabilizer are mixed by screw rod
Refining, 180 DEG C of processing temperature, extruder revolving speed 1500r/h.
(2) 90 parts of polyolefin elastomer, 5 parts of polypropylene, Nucleating Agent 1 preparation of polyolefin elastomer mixing section: are taken
Part, 1 part of stabilizer, 3 parts of toner by screw mixing, 140 DEG C of processing temperature, revolving speed 800r/h.
(3) it coats the preparation of polypropylene microparticle: step (1) being prepared into resulting polypropylene mixing section and is prepared by step (2)
Resulting polyolefin elastomer mixing section is brought together by center mouth mold；At mouth mold convergence, polypropylene section pan feeding rate V1
With polyolefin elastomer section pan feeding rate V2Control is in V2:V1=15:1, for adjusting elastomer skin thickness, elastomer cortex
Thickness control controls at 40 DEG C in 3m/s, coolant water temperature in system 5%, the control of rear draw-down rate, polyolefin elastomer is mixed
Refining section is uniformly coated on the outside of polypropylene mixing section, then passes through pelleter for strand fly-cutting into cladding polypropylene microparticle；
Pelletizing Weight control is controlled in 2mg, length in 1mm.
(4) step (3) preparation of tenacity-increased profax expanded bead: is prepared into resulting polypropylene microparticle and water by 1:180
Ratio investment reaction kettle in, by supplement flow velocity be 3t/h carbon dioxide and 160 DEG C of steam-heated modes, slowly raising
Pressure and temperature in kettle, specific pressure are 2.2MPa, and temperature is 149 DEG C, until rapidly pressure release after blow point, passes through the nature of particle
Expansion, the tenacity-increased profax expanded bead of different multiplying needed for obtaining.
It counts in mass ratio, preparing PP resin content in resulting tenacity-increased profax expanded bead is 93%, and elastomer POE contains
Amount is 5%.Mechanical property is as shown in table 1.
Embodiment 8
(1) preparation of polypropylene mixing section: 95 parts of polypropylene, 3 parts of Nucleating Agent, 2 parts of stabilizer are mixed by screw rod
Refining, 180 DEG C of processing temperature, extruder revolving speed 1500r/h.
(2) 90 parts of polyolefin elastomer, 5 parts of polypropylene, Nucleating Agent 1 preparation of polyolefin elastomer mixing section: are taken
Part, 1 part of stabilizer, 3 parts of toner by screw mixing, 140 DEG C of processing temperature, revolving speed 600r/h.
(3) it coats the preparation of polypropylene microparticle: step (1) being prepared into resulting polypropylene mixing section and is prepared by step (2)
Resulting polyolefin elastomer mixing section is brought together by center mouth mold；At mouth mold convergence, polypropylene section pan feeding rate V1
With polyolefin elastomer section pan feeding rate V2Control is in V2:V1=10:1, for adjusting elastomer skin thickness, elastomer cortex
Thickness control controls at 30 DEG C in 3m/s, coolant water temperature in system 10%, the control of rear draw-down rate, polyolefin elastomer is mixed
Refining section is uniformly coated on the outside of polypropylene mixing section, then passes through pelleter for strand fly-cutting into cladding polypropylene microparticle；
Pelletizing Weight control is controlled in 1mg, length in 1mm.
(4) step (3) preparation of tenacity-increased profax expanded bead: is prepared into resulting polypropylene microparticle and water by 1:150
Ratio investment reaction kettle in, by supplement flow velocity be 3t/h carbon dioxide and 150 DEG C of steam-heated modes, slowly raising
Pressure and temperature in kettle, specific pressure are 2.2MPa, and temperature is 149 DEG C, until rapidly pressure release after blow point, passes through the nature of particle
Expansion, the tenacity-increased profax expanded bead of different multiplying needed for obtaining.
It counts in mass ratio, preparing PP resin content in resulting tenacity-increased profax expanded bead is 88%, and elastomer POE contains
Amount is 10%.Mechanical property is as shown in table 1.
Comparative example 1
(1) preparation of polypropylene mixing section: 98 parts of polypropylene, 1 part of Nucleating Agent, 1 part of stabilizer are mixed by screw rod
Refining, 180 DEG C of processing temperature, extruder revolving speed 1500r/h.
Step (1) is prepared into resulting polypropylene microparticle and water in the ratio investment reaction kettle of 1:140, is flowed by supplement
Speed is the carbon dioxide and 160 DEG C of steam-heated modes of 3t/h, slowly improves pressure and temperature in kettle, and specific pressure is
2MPa, temperature is 150 DEG C, until rapidly pressure release after blow point, passes through the natural expansion of particle, the toughening of different multiplying needed for obtaining
Polypropylene foaming beads.
It counts in mass ratio, preparing acrylic resin content in resulting polypropylene foaming beads is 98%.Mechanical property is such as
Shown in table 1.
Comparative example 2
Polypropylene foaming beads are prepared according to preparation method described in embodiment 1.
It counts in mass ratio, preparing acrylic resin content in resulting polypropylene foaming beads is 95%, elastomeric EP DM
Content is 3%.Mechanical property is as shown in table 1.
Comparative example 3
Polypropylene foaming beads are prepared according to preparation method described in embodiment 1.
It counts in mass ratio, preparing acrylic resin content in resulting polypropylene foaming beads is 92%, elastomeric EP DM
Content is 6%.Mechanical property is as shown in table 1.
Table 1
Note: zero represents welding degree 70-80%；
● represent welding degree 90-100%.
Claims (10)
1. a kind of preparation method of tenacity-increased profax expanded bead, it is characterized in that step are as follows:
(1) polypropylene, Nucleating Agent and stabilizer the preparation of polypropylene mixing section: are passed through into screw mixing, melting temperature
160-200 DEG C, revolving speed 500-1500r/h obtains polypropylene mixing section；
(2) preparation of polyolefin elastomer mixing section: by polypropylene elastomer, polypropylene, Nucleating Agent, stabilizer and toner
By screw mixing, melting temperature is 100-150 DEG C, and revolving speed 300-1000r/h obtains polyolefin elastomer mixing section；
(3) it coats the preparation of polypropylene microparticle: step (1) is prepared into resulting polypropylene mixing section and step (2) preparation gained
Polyolefin elastomer mixing section brought together by center mouth mold, will by adjusting rear draw ratio and coolant water temperature
Polyolefin elastomer mixing section POE is uniformly coated on the outside of polypropylene mixing section PP, is then quickly cut strand by pelleter
It is cut into cladding polypropylene microparticle；
(4) preparation of tenacity-increased profax expanded bead: step (3) is prepared into resulting cladding polypropylene microparticle and is reacted with water investment
In kettle, by supplement carbon dioxide and steam-heated mode, pressure and temperature in kettle are slowly improved, until rapidly letting out after blow point
Pressure, by the natural expansion of particle, obtains the tenacity-increased profax expanded bead of different multiplying.
2. the preparation method of tenacity-increased profax expanded bead as described in claim 1, it is characterized in that: the polypropylene is random second
Third copolymer polypropylene, ethylene contents 2%-3% by weight.
3. the preparation method of tenacity-increased profax expanded bead as described in claim 1, it is characterized in that: polyolefin elastomer Shao
Family name's hardness be 60-90A, mass fraction of ethylene 40%-60%, black brittleness≤- 40 DEG C, melt index 4-20g/10min,
230 DEG C, 2.16kg.
4. the preparation method of tenacity-increased profax expanded bead as described in claim 1, it is characterized in that: the Nucleating Agent is grain
Diameter is the inorganic filler between 10-40 μm；Specially one of zinc borate, silica, titanium dioxide, calcium carbonate or talcum powder
Or it is several.
5. the preparation method of tenacity-increased profax expanded bead as described in claim 1, it is characterized in that: the stabilizer is specially anti-
One or more of oxygen agent 1010, irgasfos 168, antioxidant 1076, ultraviolet absorbing agent or light stabilizer.
6. the preparation method of tenacity-increased profax expanded bead as described in claim 1, it is characterized in that: step (1) is by weight
Specific steps are as follows: 90-95 parts of polypropylene, 2-3 parts of Nucleating Agent, 1-3 parts of stabilizer are passed through into screw mixing, processing temperature
160-200 DEG C, extruder revolving speed 500-1500r/h.
7. the preparation method of tenacity-increased profax expanded bead as described in claim 1, it is characterized in that: step (2) is by weight
Specific steps are as follows: take 80 ~ 90 parts of polyolefin elastomer, 5-10 parts of polypropylene, 2-3 parts of Nucleating Agent, 1-3 parts of stabilizer, color
4-8 parts of powder by screw mixing, 100-150 DEG C of processing temperature, revolving speed 300-1000r/h.
8. the preparation method of tenacity-increased profax expanded bead as described in claim 1, it is characterized in that: step (3) specific steps are such as
Under: step (1) is prepared into resulting polypropylene mixing section and step (2) prepare during resulting polyolefin elastomer mixing section passes through
Pit of the stomach mould is brought together；At mouth mold convergence, polypropylene section pan feeding rate V1With polyolefin elastomer section pan feeding rate V2Control exists
V1:V2=20-10:1, for adjusting elastomer skin thickness, the control of elastomer skin thickness is in system 5%-10%, rear traction speed
Rate control controls at 30-60 DEG C in 2-4 m/s, coolant water temperature, polyolefin elastomer mixing section is uniformly coated to polypropylene and is mixed
It refines on the outside of section, then passes through pelleter for strand fly-cutting into cladding polypropylene microparticle；Pelletizing Weight control is in 1-2mg, length
Degree control is in 1-2mm.
9. the preparation method of tenacity-increased profax expanded bead as described in claim 1, it is characterized in that: step (4) specific steps are such as
Under: step (3) is prepared into resulting polypropylene microparticle and water in the ratio investment reaction kettle of 1:2-180, passes through supplement flow velocity
For the carbon dioxide and 150-170 DEG C of steam-heated mode of 2-5t/h, pressure and temperature in kettle are slowly improved, specific pressure is
1-4MPa, temperature is 150-160 DEG C, until rapidly pressure release after blow point, by the natural expansion of particle, different multiplying needed for obtaining
Tenacity-increased profax expanded bead.
10. claim 1 the method prepares resulting tenacity-increased profax expanded bead, it is characterized in that: it is using PP as kernel, outside
Layer cladding POE is formed, and it is 5%-10% that wherein POE cortex, which accounts for tenacity-increased profax expanded bead mass ratio,.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112011127A (en) * | 2020-09-10 | 2020-12-01 | 无锡会通轻质材料股份有限公司 | Polypropylene expanded beads with different cell sizes and selectively distributed cells and preparation method thereof |
| CN113201187A (en) * | 2021-04-26 | 2021-08-03 | 无锡会通轻质材料股份有限公司 | Special material for modified polypropylene foaming and preparation method thereof |
| CN115197461A (en) * | 2022-08-11 | 2022-10-18 | 无锡道石新材料有限公司 | Preparation method and application of composite high-elastic foaming beads |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003147116A (en) * | 2001-11-19 | 2003-05-21 | Sumitomo Chem Co Ltd | Expandable bead, in-mold expansion molded product, method for manufacturing in-molded expansion molded product, and multi-layered molded product |
| CN106633360A (en) * | 2016-11-21 | 2017-05-10 | 广东炜林纳新材料科技股份有限公司 | Low-temperature-impact resistant polypropylene foaming bead forming body and preparation method thereof |
| CN106750944A (en) * | 2016-12-23 | 2017-05-31 | 重庆会通新材料有限公司 | A kind of modified polypropene expanded bead and preparation method thereof |
| CN106928624A (en) * | 2017-03-09 | 2017-07-07 | 山东省科学院能源研究所 | A kind of nucleocapsid nylon toughener and preparation method and application based on extruder technique |
-
2019
- 2019-02-26 CN CN201910141600.2A patent/CN109880146B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003147116A (en) * | 2001-11-19 | 2003-05-21 | Sumitomo Chem Co Ltd | Expandable bead, in-mold expansion molded product, method for manufacturing in-molded expansion molded product, and multi-layered molded product |
| CN106633360A (en) * | 2016-11-21 | 2017-05-10 | 广东炜林纳新材料科技股份有限公司 | Low-temperature-impact resistant polypropylene foaming bead forming body and preparation method thereof |
| CN106750944A (en) * | 2016-12-23 | 2017-05-31 | 重庆会通新材料有限公司 | A kind of modified polypropene expanded bead and preparation method thereof |
| CN106928624A (en) * | 2017-03-09 | 2017-07-07 | 山东省科学院能源研究所 | A kind of nucleocapsid nylon toughener and preparation method and application based on extruder technique |
Non-Patent Citations (1)
| Title |
|---|
| 丁绍兰: "《革制品材料学》", 31 July 2017 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112011127A (en) * | 2020-09-10 | 2020-12-01 | 无锡会通轻质材料股份有限公司 | Polypropylene expanded beads with different cell sizes and selectively distributed cells and preparation method thereof |
| CN113201187A (en) * | 2021-04-26 | 2021-08-03 | 无锡会通轻质材料股份有限公司 | Special material for modified polypropylene foaming and preparation method thereof |
| CN115197461A (en) * | 2022-08-11 | 2022-10-18 | 无锡道石新材料有限公司 | Preparation method and application of composite high-elastic foaming beads |
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