CN107337840A - A kind of foaming concentrate for expandable polypropylene resin and preparation method thereof - Google Patents
A kind of foaming concentrate for expandable polypropylene resin and preparation method thereof Download PDFInfo
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- CN107337840A CN107337840A CN201710728117.5A CN201710728117A CN107337840A CN 107337840 A CN107337840 A CN 107337840A CN 201710728117 A CN201710728117 A CN 201710728117A CN 107337840 A CN107337840 A CN 107337840A
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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
- C08L23/06—Polyethene
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
-
- 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
-
- 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
- B29C2948/92704—Temperature
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
- C08J2491/06—Waxes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses a kind of foaming concentrate for expandable polypropylene resin and preparation method thereof, the present invention is used for the foaming concentrate of expandable polypropylene resin, includes the component of following parts by weight：40 parts of polyvinyl resin, 10 50 parts of sodium acid carbonate, 10 50 points of sodium citrate, 1 10 parts of talcum powder, 15 parts of stearic acid, 15 parts of paraffin, 0.1 3 parts of white oil, polyvinyl resin are the polyvinyl resins that its melt index is 40 50g/10min.The present invention is used for the preparation method of the foaming concentrate of expandable polypropylene resin, is prepared again by pelleter pelletizing by being added in screw extruder to extrude by whole components.The present invention inhales exothermic equilibrium, maintains higher melt intensity possessed by polypropylene in polyacrylic foaming process, uniform foam cell is fine and close, do not rupture, while do not sacrifice and take propylene excellent mechanical property and heat resistance, and the density that expandable polypropylene resin material is made is relatively low.It is the material and method of a kind of high-efficiency environment friendly.
Description
Technical field
The present invention relates to a kind of foaming concentrate for expandable polypropylene resin and preparation method thereof.
Background technology
Polypropylene (PP) is widely used in every field because having the advantages that heat resistance, chemical stability and the feature of environmental protection,
Some developed countries are greatly developing the material for expandable polypropylene resin.
Polypropylene extrusion foaming is typically foamed using Physical and chemical method, and chemical blowing is added in acrylic resin
CBA and other auxiliary agents, extrusion foaming in an extruder after being well mixed.Traditional organic chemistry foaming agent is mostly to put
Heat type foaming agent, i.e., substantial amounts of heat is produced in decomposable process, so making melt strength, natively not high polypropylene viscosity becomes
It is lower, foaming agent decomposite come gas be not easy to be maintained in resin, make foam process be difficult to control.Therefore exploitation newcooperative medical system
Foaming agent is learned, it is particularly important to expandable polypropylene resin.The N/A of the Ferro companies production of New Jersey liquid foaming
Agent, for extruding low density polypropylene and high density polyethylene foamed plastics.The HYDROCEROL of B.I.Chemical companies
HP40P is then applied to light weight PP buckets and foamed.
It is domestic relatively fewer on polypropylene foaming agent exploitation, and the quality problems in foaming on foaming are mostly
Because foaming agent disperse it is bad caused by, while dust pollution caused by the CBA based on powder dose-type also gives environment
Bring influence.The research and development of foaming concentrate, foaming agent in the base scattered is not only solved, dust is also solved and flies poplar, dosage
The problems such as error, adhering device, production technology is simplified, improve product quality.
Chinese patent CN102089369A discloses a kind of mixing and molding that can be used for application Strong shear power, is rolled into
Type, extrusion molding and injection molding etc., being foamed into for the expanded moldings that expansion ratio is high and exterior quality is good can be obtained
Type masterbatch.But the masterbatch is a kind of thermal expansivity microcapsules, housing is formed by polymerizable monomer free crowd, serves as initiator
Peroxide easily causes polypropylene to be degraded in forming process, thus is not suitable for Situation of Polypropylene Foaming.And the masterbatch is given birth to
Production. art is complicated, equipment investment is big, process pollutes to environment.
The content of the invention
The technical problem to be solved in the present invention is：It is an object of the invention to provide a kind of for expandable polypropylene resin
Foaming concentrate, and a kind of preparation method for the foaming concentrate for being previously used for expandable polypropylene resin is provided.
In order to solve the above-mentioned technical problem, the present invention is used for the foaming concentrate of expandable polypropylene resin, includes following weight
The component of part：40 parts of polyvinyl resin, sodium acid carbonate 10-50 parts, 10-50 points of sodium citrate, talcum powder 1-10 parts, stearic acid 1-
5 parts, paraffin 1-5 parts, white oil 0.1-3 parts, polyvinyl resin are the polyvinyl resins that its melt index is 40-50g/10min.
In order to further optimize foaming concentrate, the present invention includes the component of following parts by weight：40 parts of polyvinyl resin, add
20 parts of sodium acid carbonate, 15 parts of sodium citrate, 10 parts of talcum powder, 1.2 parts of stearic acid, 2.5 parts of paraffin, 0.5 part of white oil, polyethylene tree
Fat is the polyvinyl resin that its melt index is 45g/10min.
For the ease of foaming concentrate is made, described foaming concentrate is squeezed by the way that whole components are added in screw extruder
Go out and be prepared again by pelleter pelletizing, described screw extruder is equidirectional parallel double-screw extruder, described pelletizing
Machine be adjustable speed than pelleter.
The present invention is used for the preparation method of the foaming concentrate of expandable polypropylene resin, and the foaming concentrate is foregoing any one
Kind foaming concentrate, the preparation method is extruded again by pelleter pelletizing by the way that whole components are added in screw extruder
Be prepared, described screw extruder is equidirectional parallel double-screw extruder, described pelleter be adjustable speed than
Pelleter.
In order to further optimize foaming concentrate, the present invention is used for the preparation method of the foaming concentrate of expandable polypropylene resin,
Component also includes component pre-treatment step before screw extruder is added to, and component pre-treatment step is：Talcum powder exists in advance
In mixer stirring reach 100 DEG C to temperature of charge after release, it is standby after temperature is down to normal temperature, then by polyvinyl resin,
Sodium acid carbonate, sodium citrate, talcum powder, stearic acid, paraffin and white oil are in mixer with material temperature when mixing 6 minutes, mixing
Degree control is within 40 DEG C, and the screw speed of described screw extruder is 150-300rpm/min, Screw Extrusion built-in temperature
For 110 DEG C -125 DEG C, it is 10-15mm particles that the material strip of foaming master batch is cut into length by described pelleter.
The beneficial effects of the invention are as follows：
(1) in foaming concentrate of the invention, CBA is that a variety of inorganic foaming agent compoundings form, in polyacrylic hair
During bubble, exothermic equilibrium is inhaled, maintains higher melt intensity possessed by polypropylene, uniform foam cell is fine and close, does not rupture, simultaneously
Do not sacrifice and take propylene excellent mechanical property and heat resistance, and the density that expandable polypropylene resin material is made is relatively low,
Extrusion available for polypropylene foamed plate, foam pipe and foamed profile.
(2) in being designed for the formula of the foaming concentrate of expandable polypropylene resin, from a variety of inorganic chemical foaming agents
Compounding, the thermodynamic behaviour decomposed using each component, adjust foaming agent in foaming process and inhale exothermic equilibrium, maintain polypropylene tree
Fat keeps enough melt strengths in Bubble Formation Process.
(3) resin based on the polyvinyl resin of high melting means, adds a variety of inorganic chemical foaming agents, nucleator, lubrication
The auxiliary agents such as agent are well mixed in high-speed mixer, and material strip, adjustable speed ratio are extruded using equidirectional parallel double-screw extruder
Pelleter, by the particle diameter pelletizing of foaming concentrate to 10-15m grow, its caused abscess in foaming process is uniformly divided
Cloth, it is the material and method of a kind of high-efficiency environment friendly.
Embodiment
Embodiment 1, this be used for expandable polypropylene resin foaming concentrate include as weight than lower component：Polyvinyl resin
40 parts, 20 parts of sodium acid carbonate, 15 parts of sodium citrate, 10 parts of talcum powder, 1.2 parts of stearic acid, 2.5 parts of paraffin, 0.5 part of white oil, gather
Vinyl is the polyvinyl resin that its melt index is 45g/10min.
This is for foaming concentrate preparation method of expandable polypropylene resin：Talcum powder is stirred to thing in mixer in advance
Material temperature degree is released after reaching 100 DEG C, standby after temperature is down to normal temperature.Then by polyvinyl resin, sodium acid carbonate, citric acid
Sodium, talcum powder, stearic acid, paraffin and white oil in mixer with mixing 6 minutes, mixing when temperature of charge control 40 DEG C with
Interior, compounding extrusion, nine Heating Zone Temperatures of extruder are set as 100 successively in equidirectional parallel double-screw extruder after discharging
DEG C, 110 DEG C, 110 DEG C, 115 DEG C, 115 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, head temperature：125 DEG C, main-machine screw turns
Speed is 300rpm/min, the material strip of extruder extrusion by pelleter pelletizing, during pelletizing using adjustable speed than pelletizing
It is 12mm particles that the material strip of foaming master batch is cut into length by machine.
Embodiment 2, this be used for expandable polypropylene resin foaming concentrate include as weight than lower component：Polyvinyl resin
40 parts, 30 parts of sodium acid carbonate, 40 parts of sodium citrate, 8 parts of talcum powder, 1.5 parts of stearic acid, 3 parts of paraffin, 1 part of white oil, polyethylene tree
Fat is the polyvinyl resin that its melt index is 43g/10min.
This is for foaming concentrate preparation method of expandable polypropylene resin：Talcum powder is stirred to thing in mixer in advance
Material temperature degree is released after reaching 100 DEG C, standby after temperature is down to normal temperature.Then by polyvinyl resin, sodium acid carbonate, citric acid
Sodium, talcum powder, stearic acid, paraffin and white oil in mixer with mixing 6 minutes, mixing when temperature of charge control 40 DEG C with
Interior, compounding extrusion, nine Heating Zone Temperatures of extruder are set as 110 successively in equidirectional parallel double-screw extruder after discharging
DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, head temperature：125 DEG C, main-machine screw turns
Speed is 250rpm/min, the material strip of extruder extrusion by pelleter pelletizing, during pelletizing using adjustable speed than pelletizing
It is 10mm particles that the material strip of foaming master batch is cut into length by machine.
Embodiment 3, this be used for expandable polypropylene resin foaming concentrate include as weight than lower component：Polyvinyl resin
40 parts, 15 parts of sodium acid carbonate, 20 parts of sodium citrate, 5 parts of talcum powder, 3 parts of stearic acid, 4 parts of paraffin, 1.5 parts of white oil.Polyethylene tree
Fat is the polyvinyl resin that its melt index is 48g/10min.
This is for foaming concentrate preparation method of expandable polypropylene resin：Talcum powder is stirred to thing in mixer in advance
Material temperature degree is released after reaching 100 DEG C, standby after temperature is down to normal temperature.Then by polyvinyl resin, sodium acid carbonate, citric acid
Sodium, talcum powder, stearic acid, paraffin and white oil in mixer with mixing 6 minutes, mixing when temperature of charge control 40 DEG C with
Interior, compounding extrusion, nine Heating Zone Temperatures of extruder are set as 110 successively in equidirectional parallel double-screw extruder after discharging
DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, head temperature：125 DEG C, main-machine screw turns
Speed is 200rpm/min, the material strip of extruder extrusion by pelleter pelletizing, during pelletizing using adjustable speed than pelletizing
It is 14mm particles that the material strip of foaming master batch is cut into length by machine.
Embodiment 4, this be used for expandable polypropylene resin foaming concentrate include as weight than lower component：Polyvinyl resin
40 parts, 40 parts of sodium acid carbonate, 30 parts of sodium citrate, 3 parts of talcum powder, 2.5 parts of stearic acid, 2 parts of paraffin, 2 parts of white oil.Polyethylene tree
Fat is the polyvinyl resin that its melt index is 42g/10min.
This is for foaming concentrate preparation method of expandable polypropylene resin：Talcum powder is stirred to thing in mixer in advance
Material temperature degree is released after reaching 100 DEG C, standby after temperature is down to normal temperature.Then by polyvinyl resin, sodium acid carbonate, citric acid
Sodium, talcum powder, stearic acid, paraffin and white oil in mixer with mixing 6 minutes, mixing when temperature of charge control 40 DEG C with
Interior, compounding extrusion, nine Heating Zone Temperatures of extruder are set as 110 successively in equidirectional parallel double-screw extruder after discharging
DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, head temperature：125 DEG C, main-machine screw turns
Speed is 150rpm/min, the material strip of extruder extrusion by pelleter pelletizing, during pelletizing using adjustable speed than pelletizing
It is 15mm particles that the material strip of foaming master batch is cut into length by machine.
Embodiment 5, this be used for expandable polypropylene resin foaming concentrate include as weight than lower component：Polyvinyl resin
40 parts, 10 parts of sodium acid carbonate, 10 parts of sodium citrate, 1 part of talcum powder, 1 part of stearic acid, 1 part of paraffin, 0.1 part of white oil.Polyethylene tree
Fat is the polyvinyl resin that its melt index is 40g/10min.
This is for foaming concentrate preparation method of expandable polypropylene resin：Talcum powder is stirred to thing in mixer in advance
Material temperature degree is released after reaching 100 DEG C, standby after temperature is down to normal temperature.Then by polyvinyl resin, sodium acid carbonate, citric acid
Sodium, talcum powder, stearic acid, paraffin and white oil in mixer with mixing 6 minutes, mixing when temperature of charge control 40 DEG C with
Interior, compounding extrusion, nine Heating Zone Temperatures of extruder are set as 110 successively in equidirectional parallel double-screw extruder after discharging
DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, head temperature：125 DEG C, main-machine screw turns
Speed is 250rpm/min, the material strip of extruder extrusion by pelleter pelletizing, during pelletizing using adjustable speed than pelletizing
It is 13mm particles that the material strip of foaming master batch is cut into length by machine.
Embodiment 6, this be used for expandable polypropylene resin foaming concentrate include as weight than lower component：Polyvinyl resin
40 parts, 50 parts of sodium acid carbonate, 50 parts of sodium citrate, 10 parts of talcum powder, 5 parts of stearic acid, 5 parts of paraffin, 3 parts of white oil.Polyethylene tree
Fat is the polyvinyl resin that its melt index is 50g/10min.
This is for foaming concentrate preparation method of expandable polypropylene resin：Talcum powder is stirred to thing in mixer in advance
Material temperature degree is released after reaching 100 DEG C, standby after temperature is down to normal temperature.Then by polyvinyl resin, sodium acid carbonate, citric acid
Sodium, talcum powder, stearic acid, paraffin and white oil in mixer with mixing 6 minutes, mixing when temperature of charge control 40 DEG C with
Interior, compounding extrusion, nine Heating Zone Temperatures of extruder are set as 110 successively in equidirectional parallel double-screw extruder after discharging
DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, 120 DEG C, head temperature：125 DEG C, main-machine screw turns
Speed is 200rpm/min, the material strip of extruder extrusion by pelleter pelletizing, during pelletizing using adjustable speed than pelletizing
It is 10mm particles that the material strip of foaming master batch is cut into length by machine.
Specific embodiment of the invention 1-6 performance parameter is shown in Tables 1 and 2.
Table 1
Table 2
Prepared by above-described embodiment 1-6 is used for polypropylene expanded foaming concentrate, and foaming concentrate gas forming amount is big, to be foamed into
Keep polyacrylic higher melt strength in type, uniform foam cell is fine and close, does not rupture, does not connect, and expansion density is low and density
It is adjustable, while polypropylene excellent mechanical property and heat resistance are not sacrificed, available for polypropylene foamed sheet, foam pipe
With the extrusion of foamed profile, the relatively low expandable polypropylene resin product of density can be made.
Heretofore described equidirectional parallel double-screw extruder is prior art, and equidirectional parallel double-screw extruder is from feeding
Material mouth is disposed with nine heating zones and heating head to discharging opening, and colleague's parallel double-screw runs through nine heating zones, discharged
Mouth is arranged on head.Two screw rods cocurrent and parallel moves during operating.
The melt index determination of polyvinyl resin uses GB-T 3682-2000 thermoplastic melt qualities in the present invention
The measure of flow rate and melt volume-flow rate, test condition：Nominal load 2.16KG, 190 DEG C of test temperature.
Claims (5)
- A kind of 1. foaming concentrate for expandable polypropylene resin, it is characterised in that：Include the component of following parts by weight：Polyethylene 40 parts of resin, sodium acid carbonate 10-50 parts, 10-50 points of sodium citrate, talcum powder 1-10 parts, stearic acid 1-5 parts, paraffin 1-5 parts, 0.1-3 part of white oil, polyvinyl resin are the polyvinyl resins that its melt index is 40-50g/10min.
- 2. the foaming concentrate according to claim 1 for expandable polypropylene resin, it is characterised in that：Include following weight The component of part：40 parts of polyvinyl resin, add 20 parts of sodium acid carbonate, 15 parts of sodium citrate, 10 parts of talcum powder, 1.2 parts of stearic acid, 2.5 parts of paraffin, 0.5 part of white oil, polyvinyl resin are the polyvinyl resins that its melt index is 45g/10min.
- 3. the foaming concentrate according to claim 1 for expandable polypropylene resin, it is characterised in that：Described foaming is female Material is prepared by pelleter pelletizing again by being added in screw extruder to extrude by whole components, described Screw Extrusion Machine is equidirectional parallel double-screw extruder, described pelleter be adjustable speed than pelleter.
- A kind of 4. preparation method of foaming concentrate for expandable polypropylene resin, it is characterised in that：The foaming concentrate be as Foaming concentrate described in claim 1,2 or 3, the preparation method are squeezed by the way that whole components are added in screw extruder Go out and be prepared again by pelleter pelletizing, described screw extruder is equidirectional parallel double-screw extruder, described pelletizing Machine be adjustable speed than pelleter.
- 5. the preparation method of the foaming concentrate according to claim 4 for expandable polypropylene resin, it is characterised in that：Group Divide also includes component pre-treatment step before screw extruder is added to, and component pre-treatment step is：Talcum powder is in advance mixed Stirring is released after reaching 100 DEG C to temperature of charge in conjunction machine, standby after temperature is down to normal temperature, then by polyvinyl resin, carbon Sour hydrogen sodium, sodium citrate, talcum powder, stearic acid, paraffin and white oil are in mixer with temperature of charge when mixing 6 minutes, mixing Control is within 40 DEG C, and the screw speed of described screw extruder is 150-300rpm/min, and Screw Extrusion built-in temperature is 110 DEG C -125 DEG C, it is 10-15mm particles that the material strip of foaming master batch is cut into length by described pelleter.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110922676A (en) * | 2019-10-30 | 2020-03-27 | 中化石化销售有限公司 | Preparation method of foaming agent master batch |
| CN111057295A (en) * | 2019-11-25 | 2020-04-24 | 怀化东庆科技有限公司 | Foaming master batch and preparation method thereof |
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| CN104341667A (en) * | 2014-11-17 | 2015-02-11 | 武汉江南铁依环保产业发展有限公司 | Polyethylene halogen-free flame-retarding foaming master batch and preparation method thereof |
| CN105694484A (en) * | 2016-03-11 | 2016-06-22 | 福州市昊旺材料科技有限公司 | TPE (thermoplastic elastomer) foamed master batch and preparation method thereof |
| CN105924778A (en) * | 2016-05-25 | 2016-09-07 | 广州聚注专利研发有限公司 | Polypropylene microcellular foam composite material and preparation method thereof |
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| CN110922676A (en) * | 2019-10-30 | 2020-03-27 | 中化石化销售有限公司 | Preparation method of foaming agent master batch |
| CN111057295A (en) * | 2019-11-25 | 2020-04-24 | 怀化东庆科技有限公司 | Foaming master batch and preparation method thereof |
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