CN103102583B - A kind of polypropylene microporous expanded material and preparation method thereof - Google Patents
A kind of polypropylene microporous expanded material and preparation method thereof Download PDFInfo
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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
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/88—Adding charges, i.e. additives
- B29B7/90—Fillers or reinforcements, e.g. fibres
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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
- B29B9/12—Making granules characterised by structure or composition
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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
- B29B9/12—Making granules characterised by structure or composition
- B29B9/14—Making granules characterised by structure or composition fibre-reinforced
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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
- B29B9/16—Auxiliary treatment of granules
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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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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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
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- 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
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
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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
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7461—Combinations of dissimilar mixers
-
- 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
-
- 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
- B29C2948/9259—Angular velocity
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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
- B29C2948/92704—Temperature
-
- 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
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
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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
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
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Abstract
The invention belongs to technical field of polymer materials, disclose a kind of polypropylene microporous expanded material and preparation method thereof.Polypropylene microporous expanded material disclosed by the invention is made up of the component including following weight/mass percentage composition: 60～the foaming agent of fiber glass reinforced polypropylene master batch, 1～10% of the high melt strength, propylene of 80%, 10～30% and 0.1～5% blowing promotor.The invention also discloses the preparation method of above-mentioned polypropylene microporous expanded material.The present invention uses fretting map injection molding process simple, easily controllable, and the polypropylene microporous expanded material light weight for preparing, intensity is good, abscess is little and fine and close, and has the characteristic of good absorbing sound and lowering noise, has the application prospect of excellence on automotive upholstery.
Description
Technical field
The invention belongs to technical field of polymer materials, relate to a kind of polypropylene microporous expanded material and preparation method thereof.
Background technology
Polypropylene is due to abundant raw material source, low price, easily processed into type, purposes widely；Simultaneously, polypropylene density is low, excellent in mechanical performance, resistance to impact, thermostability and chemical stability are good, therefore, polypropylene (PP) expanded material has preferable heat resistance, excellent shock-absorbing capacity, good rigidity, corrosion resistance, the superior performance such as degradable, is widely used in the aspects such as automotive upholstery, plastic sheets, packaging material and heat-barrier material and is paid close attention to by people, becomes the focus in foam plastics industry.
At present, the developed country such as the U.S., Germany, Japan is just at the environmentally friendly packing material of Devoting Major Efforts To Developing PP foam material polystyrene foam plastics as an alternative.But owing to general isotactic polypropylene resin is the linear polymer of partially crystallizable, its melt strength is relatively low and during elongational flow without strain hardening phenomenon, melt viscosity is very sensitive to temperature conditions, flowed hardly before not up to melt temperature, and melt viscosity drastically declines when exceeding melt temperature, during foaming, cell wall is easily broken and merges；It addition, heat release during crystalling propylene, melt cooling is slow, and gas easily scatters and disappears, so being difficult to the polypropylene foam that molding uniform foam cell is fine and closely woven, apparent density is low.High melt strength, propylene (HMSPP) has good foam performance, good mechanical performance, is the important directions of Future Development.Montell company of Belgium is constantly in first place in the world in terms of exploitation HMSPP, and the said firm is a kind of polypropylene being specifically designed to expanded material containing long-chain branch at the Profax-F814 resin that 1994 release, and is the ideal material preparing foaming product.
Compared with common expanded material, microporous foam (MCP) has the micro pore shape of uniqueness and excellent mechanical property, it is well suited for the expanded articles of very small dimensions, has a wide range of applications in industries such as packaging, building, auto industry, aerospace industries and sports equipments.Polypropylene microporous foamed materials has attracted increasing concern with its excellent mechanical property and extensive use, but the technique understanding to micro molding need to improve.At present, the technology of preparing of polypropylene microporous foam (MCPP) mainly uses gas supersaturation technology and supercritical technology.Wherein, micropore is formed and mostly uses batch process, and molding cycle is long, is unfavorable for industrialized production；The micropore extruding technology using SCF technology will be PP foaming field prior development direction from now on.Such as U.S. TrexrcellularPlasticTechnology, Axiomaties company of many leading companys etc. has been working on actual application and development and the commercialization popularization of microbubble technique；More domestic colleges and universities and R&D institution, the most also carried out the forming method of cellular plastic and the research of theory such as South China Science & Engineering University, Chinese Academy of Sciences's chemistry institute, East China University of Science, Hubei University etc..
Chinese patent CN101792554A discloses a kind of micro-foaming polypropylene and preparation method thereof, the method uses polypropylene to be primary raw material, the microcapsule foamer or the microcapsule foaming master batch that add polypropylene weight ratio 0.1-10% are foaming agent, preparing PP foam material by extrusion, injection or compression molding, this product density is at 0.05-0.9g/m3, combination property is good；Simultaneously, Chinese patent CN102146182A also discloses that the preparation method of a kind of PP microporous foam composite, the method uses imvite modified PP, uniformly mix with wood powder, foaming agent and blowing promotor by a certain percentage, under the conditions of twice-die-opening, prepare PP microporous foam/wood flour composite material by injection molding forming method.Guizhou University's any forces etc. use the glass fibre of surface modification to fill enhancing microporous foam polypropylene material, have studied the glass fibre impact on microporous foam Properties of Polypropylene, the comprehensive mechanical property making microporous foam GF/PP system improves, and microcellular foam material can be applied in broader field.
More than study and invent the development to expanded polypropylene material and popularization has great importance, but in process of production, still can there is many deficiencies, as foam process is complicated, controlling and the course of processing is difficult, foam structure is uneven, it is impossible to prepare the microcellular foam material of high foamability.
Summary of the invention
Drawbacks described above based on prior art, it is an object of the invention to provide a kind of polypropylene microporous expanded material, and this quality of materials is light, intensity good, abscess is little and fine and close, and has the characteristic of good absorbing sound and lowering noise.
It is a further object to provide the preparation method of a kind of above-mentioned polypropylene microporous expanded material, this method processing technique is simple, and equipment investment is relatively low.
Technical scheme is as follows:
The invention provides a kind of polypropylene microporous expanded material, this material is made up of the component including following weight/mass percentage composition:
High melt strength, propylene (HSMPP) 60～80%,
Fiber glass reinforced polypropylene master batch (GF/PP master batch) 10～30%,
Foaming agent 1～10%,
Blowing promotor 0.1～5%.
In described fiber glass reinforced polypropylene master batch, glass fibre accounts for the mass ratio of fiber glass reinforced polypropylene master batch is 10～30%.
Described foaming agent is azodicarbonamide.
Described blowing promotor is selected from one or both in zinc oxide or zinc stearate.
Present invention also offers the preparation method of a kind of above-mentioned polypropylene microporous expanded material, the method comprises the following steps:
(1) weighing weight/mass percentage composition is 60～the high melt strength, propylene of 80% and fiber glass reinforced polypropylene master batch mix homogeneously that weight/mass percentage composition is 10～30%; melt extrude pelletize on the twin screw extruder; extrusion temperature is 140～160 DEG C, obtains extruding modified polypropene pellet；
(2) the modified polypropene pellet in step (1) is added liquid paraffin mix homogeneously, polypropylene granules is 25: 1～75: 1 with the mass ratio of liquid paraffin, being subsequently adding weight/mass percentage composition is 1～the foaming agent of 10% and blowing promotor that weight/mass percentage composition is 0.1～5%, is sufficiently mixed uniformly on homogenizer；
(3) being sent in injection machine by the material mixed in step (2), microporous foam injection mo(u)lding in the range of foaming agent heat activation temperature, wherein injection temperature is 160～220 DEG C, i.e. prepares polypropylene microporous expanded material.
The rotating speed of described homogenizer is 2000～4000r/min.
The present invention compared with the existing technology, has the advantage that and beneficial effect:
1, the polypropylene microporous expanded material of the present invention uses HSMPP and GF/PP master batch to be raw material, both avoided general isotactic polypropylene because of melt strength low, when being easily caused foaming cell wall be easily broken with merge, be difficult to molding, the problem of uniform foam cell is fine and closely woven, apparent density is low foamed materials, meanwhile, GF/PP master batch is also beneficial to the raising of microcellular foam material intensity.
2, the present invention uses fretting map injection molding process simple, easily controllable, the polypropylene microporous expanded material light weight for preparing, intensity is good, abscess is little and fine and close, and there is the characteristic of good absorbing sound and lowering noise, automotive upholstery has the application prospect of excellence.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing illustrated embodiment, the present invention is further illustrated.
Fiber glass reinforced polypropylene master batch used below is bought from Hefei Genius Advanced Materials Co., Ltd..
Embodiment 1
Raw material (kg) is weighed according to weight below:
High melt strength, propylene (HSMPP white particle) 60kg, weight/mass percentage composition is 60%,
Fiber glass reinforced polypropylene master batch (GF/PP master batch, for white particle) 30kg, weight/mass percentage composition is 30%
(wherein GF accounts for the weight/mass percentage composition of GF/PP master batch is 20%),
Foaming agent azodicarbonamide (AC) 7kg, weight/mass percentage composition is 7%,
Blowing promotor zinc stearate 3kg, weight/mass percentage composition is 3%；
The method producing this kind of polypropylene microporous expanded material: Fig. 1 is process flow diagram.
Weighing raw material according to aforementioned proportion, by 60kgHSMPP and 30kgGF/PP master batch mix homogeneously, melt extrude pelletize on the twin screw extruder, extrusion temperature is at 140-160 DEG C；Above-mentioned MODIFIED PP pellet is added 1.8kg liquid paraffin (wherein, PP pellet is 50: 1 with the mass ratio of liquid paraffin), makes pellet surface uniform wet, to reach uniformly to mix；Being subsequently adding 7kg azodicarbonamide, 3kg zinc stearate, be sufficiently mixed uniformly on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min；Being sent in injection machine by this material mixed, micro foaming injection moulding in the range of foaming agent heat activation temperature, injection temperature, at 160-220 DEG C, i.e. prepares PP microcellular foam material.Prepared polypropylene microporous expanded material is carried out performance test, and test result is shown in Table 1.
Embodiment 2
Raw material (kg) is weighed according to weight below:
High melt strength, propylene (HSMPP white particle) 70kg, weight/mass percentage composition is 70%,
Fiber glass reinforced polypropylene master batch (GF/PP master batch, for white particle) 20kg, weight/mass percentage composition is 20%
(wherein GF accounts for the weight/mass percentage composition of GF/PP master batch is 20%),
Foaming agent azodicarbonamide (AC) 7kg, weight/mass percentage composition is 7%,
Blowing promotor zinc stearate 3kg, weight/mass percentage composition is 3%；
Weighing raw material according to aforementioned proportion, by 70kgHSMPP and 20kgGF/PP master batch mix homogeneously, melt extrude pelletize on the twin screw extruder, extrusion temperature is at 140-160 DEG C；Above-mentioned MODIFIED PP pellet is added 3.6kg liquid paraffin (wherein, PP pellet is 25: 1 with the mass ratio of liquid paraffin), makes pellet surface uniform wet, to reach uniformly to mix；Being subsequently adding 7kg azodicarbonamide, 3kg zinc stearate, be sufficiently mixed uniformly on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min；Being sent in injection machine by this material mixed, micro foaming injection moulding in the range of foaming agent heat activation temperature, injection temperature, at 160-220 DEG C, i.e. prepares PP microcellular foam material.Prepared polypropylene microporous expanded material is carried out performance test, and test result is shown in Table 1.
Embodiment 3
Raw material (kg) is weighed according to weight below:
High melt strength, propylene (HSMPP white particle) 80kg, weight/mass percentage composition is 80%,
Fiber glass reinforced polypropylene master batch (GF/PP master batch, for white particle) 10kg, weight/mass percentage composition is 10%
(wherein GF accounts for the weight/mass percentage composition of GF/PP master batch is 15%),
Foaming agent azodicarbonamide (AC) 7kg, weight/mass percentage composition is 7%,
Blowing promotor zinc oxide 3kg, weight/mass percentage composition is 3%；
Weighing raw material according to aforementioned proportion, by 80kgHSMPP and 10kgGF/PP master batch mix homogeneously, melt extrude pelletize on the twin screw extruder, extrusion temperature is at 140-160 DEG C；Above-mentioned MODIFIED PP pellet is added 1.2kg liquid paraffin (wherein, PP pellet is 75: 1 with the mass ratio of liquid paraffin), makes pellet surface uniform wet, to reach uniformly to mix；Being subsequently adding 7kg azodicarbonamide, 3kg zinc oxide, be sufficiently mixed uniformly on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min；Being sent in injection machine by this material mixed, micro foaming injection moulding in the range of foaming agent heat activation temperature, injection temperature, at 160-220 DEG C, i.e. prepares PP microcellular foam material.Prepared polypropylene microporous expanded material is carried out performance test, and test result is shown in Table 1.
Embodiment 4
Raw material (kg) is weighed according to weight below:
High melt strength, propylene (HSMPP white particle) 80kg, weight/mass percentage composition is 80%,
Fiber glass reinforced polypropylene master batch (GF/PP master batch, for white particle) 18kg, weight/mass percentage composition is 18%
(wherein GF accounts for the weight/mass percentage composition of GF/PP master batch is 25%),
Foaming agent azodicarbonamide (AC) 1kg, weight/mass percentage composition is 1%,
Blowing promotor zinc oxide 1kg, weight/mass percentage composition is 1%；
Weighing raw material according to aforementioned proportion, by 80kgHSMPP and 18kgGF/PP master batch mix homogeneously, melt extrude pelletize on the twin screw extruder, extrusion temperature is at 140-160 DEG C；Above-mentioned MODIFIED PP pellet is added 1.96kg liquid paraffin (wherein, PP pellet is 50: 1 with the mass ratio of liquid paraffin), makes pellet surface uniform wet, to reach uniformly to mix；Being subsequently adding 1kg azodicarbonamide, 1kg zinc oxide, be sufficiently mixed uniformly on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min；Being sent in injection machine by this material mixed, micro foaming injection moulding in the range of foaming agent heat activation temperature, injection temperature, at 160-220 DEG C, i.e. prepares PP microcellular foam material.
Embodiment 5
Raw material (kg) is weighed according to weight below:
High melt strength, propylene (HSMPP white particle) 70kg, weight/mass percentage composition is 70%,
Fiber glass reinforced polypropylene master batch (GF/PP master batch, for white particle) 18kg, weight/mass percentage composition is 18%
(wherein GF accounts for the weight/mass percentage composition of GF/PP master batch is 20%),
Foaming agent azodicarbonamide (AC) 10kg, weight/mass percentage composition is 10%,
Blowing promotor zinc stearate 2kg, weight/mass percentage composition is 2%；
Weighing raw material according to aforementioned proportion, by 70kgHSMPP and 18kgGF/PP master batch mix homogeneously, melt extrude pelletize on the twin screw extruder, extrusion temperature is at 140-160 DEG C；Above-mentioned MODIFIED PP pellet is added 1.76kg liquid paraffin (wherein, PP pellet is 50: 1 with the mass ratio of liquid paraffin), makes pellet surface uniform wet, to reach uniformly to mix；Being subsequently adding 10kg azodicarbonamide, 2kg zinc stearate, be sufficiently mixed uniformly on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min；Being sent in injection machine by this material mixed, micro foaming injection moulding in the range of foaming agent heat activation temperature, injection temperature, at 160-220 DEG C, i.e. prepares PP microcellular foam material.
Embodiment 6
Raw material (kg) is weighed according to weight below:
High melt strength, propylene (HSMPP white particle) 70kg, weight/mass percentage composition is 70%,
Fiber glass reinforced polypropylene master batch (GF/PP master batch, for white particle) 25kg, weight/mass percentage composition is 25%
(wherein GF accounts for the weight/mass percentage composition of GF/PP master batch is 10%),
Foaming agent azodicarbonamide (AC) 4.9kg, weight/mass percentage composition is 4.9%；
Blowing promotor zinc stearate 0.1kg, weight/mass percentage composition is 0.1%；
Weighing raw material according to aforementioned proportion, by 70kgHSMPP and 25kgGF/PP master batch mix homogeneously, melt extrude pelletize on the twin screw extruder, extrusion temperature is at 140-160 DEG C；Above-mentioned MODIFIED PP pellet is added 1.9kg liquid paraffin (wherein, PP pellet is 50: 1 with the mass ratio of liquid paraffin), makes pellet surface uniform wet, to reach uniformly to mix；Being subsequently adding 4.9kg azodicarbonamide, 0.1kg zinc stearate, be sufficiently mixed uniformly on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min；Being sent in injection machine by this material mixed, micro foaming injection moulding in the range of foaming agent heat activation temperature, injection temperature, at 160-220 DEG C, i.e. prepares PP microcellular foam material.
Embodiment 7
Raw material (kg) is weighed according to weight below:
High melt strength, propylene (HSMPP white particle) 65kg, weight/mass percentage composition is 65%,
Fiber glass reinforced polypropylene master batch (GF/PP master batch, for white particle) 20kg, weight/mass percentage composition is 20%
(wherein GF accounts for the weight/mass percentage composition of GF/PP master batch is 30%),
Foaming agent azodicarbonamide (AC) 10kg, weight/mass percentage composition is 10%,
The mixture 5kg of blowing promotor zinc stearate and zinc oxide, weight/mass percentage composition is 5%；
Weighing raw material according to aforementioned proportion, by 65kgHSMPP and 20kgGF/PP master batch mix homogeneously, melt extrude pelletize on the twin screw extruder, extrusion temperature is at 140-160 DEG C；Above-mentioned MODIFIED PP pellet is added 1.7kg liquid paraffin (wherein, PP pellet is 50: 1 with the mass ratio of liquid paraffin), makes pellet surface uniform wet, to reach uniformly to mix；Being subsequently adding 10kg azodicarbonamide, 5kg zinc stearate and the mixture of zinc oxide, be sufficiently mixed uniformly on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min；Being sent in injection machine by this material mixed, micro foaming injection moulding in the range of foaming agent heat activation temperature, injection temperature, at 160-220 DEG C, i.e. prepares PP microcellular foam material.
Embodiment 8
Raw material (kg) is weighed according to weight below:
High melt strength, propylene (HSMPP white particle) 70kg, weight/mass percentage composition is 70%,
Fiber glass reinforced polypropylene master batch (GF/PP master batch, for white particle) 20kg, weight/mass percentage composition is 20%
(wherein GF accounts for the weight/mass percentage composition of GF/PP master batch is 20%),
Foaming agent azodicarbonamide (AC) 7.5kg, weight/mass percentage composition is 7.5%,
Blowing promotor zinc stearate 2.5kg, weight/mass percentage composition is 2.5%；
Weighing raw material according to aforementioned proportion, by 70kgHSMPP and 20kgGF/PP master batch mix homogeneously, melt extrude pelletize on the twin screw extruder, extrusion temperature is at 140-160 DEG C；Above-mentioned MODIFIED PP pellet is added 1.8kg liquid paraffin (wherein, PP pellet is 50: 1 with the mass ratio of liquid paraffin), makes pellet surface uniform wet, to reach uniformly to mix；Being subsequently adding 7.5kg azodicarbonamide, 2.5kg zinc stearate, be sufficiently mixed uniformly on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min；Being sent in injection machine by this material mixed, micro foaming injection moulding in the range of foaming agent heat activation temperature, injection temperature, at 160-220 DEG C, i.e. prepares PP microcellular foam material.
Embodiment 9
Raw material (kg) is weighed according to weight below:
High melt strength, propylene (HSMPP white particle) 70kg, weight/mass percentage composition is 70%,
Fiber glass reinforced polypropylene master batch (GF/PP master batch, for white particle) 20kg, weight/mass percentage composition is 20%
(wherein GF accounts for the weight/mass percentage composition of GF/PP master batch is 30%),
Foaming agent azodicarbonamide (AC) 9kg, weight/mass percentage composition is 9%,
Blowing promotor zinc oxide 1kg, weight/mass percentage composition is 1%；
Weighing raw material according to aforementioned proportion, by 70kgHSMPP and 20kgGF/PP master batch mix homogeneously, melt extrude pelletize on the twin screw extruder, extrusion temperature is at 140-160 DEG C；Above-mentioned MODIFIED PP pellet is added 1.8kg liquid paraffin (wherein, PP pellet is 50: 1 with the mass ratio of liquid paraffin), makes pellet surface uniform wet, to reach uniformly to mix；Being subsequently adding 9kg azodicarbonamide, 1kg zinc oxide, be sufficiently mixed uniformly on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min；Being sent in injection machine by this material mixed, micro foaming injection moulding in the range of foaming agent heat activation temperature, injection temperature, at 160-220 DEG C, i.e. prepares PP microcellular foam material.
Embodiment 10
Raw material (kg) is weighed according to weight below:
High melt strength, propylene (HSMPP white particle) 70kg, weight/mass percentage composition is 70%,
Fiber glass reinforced polypropylene master batch (GF/PP master batch, for white particle) 18kg, weight/mass percentage composition is 18%
(wherein GF accounts for the weight/mass percentage composition of GF/PP master batch is 20%),
Foaming agent azodicarbonamide (AC) 10kg, weight/mass percentage composition is 10%,
Blowing promotor zinc oxide 2kg, weight/mass percentage composition is 2%；
Weighing raw material according to aforementioned proportion, by 70kgHSMPP and 18kgGF/PP master batch mix homogeneously, melt extrude pelletize on the twin screw extruder, extrusion temperature is at 140-160 DEG C；Above-mentioned MODIFIED PP pellet is added 1.76kg liquid paraffin (wherein, PP pellet is 50: 1 with the mass ratio of liquid paraffin), makes pellet surface uniform wet, to reach uniformly to mix；Being subsequently adding 10kg azodicarbonamide, 2kg zinc oxide, be sufficiently mixed uniformly on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min；Being sent in injection machine by this material mixed, micro foaming injection moulding in the range of foaming agent heat activation temperature, injection temperature, at 160-220 DEG C, i.e. prepares PP microcellular foam material.
Embodiment 11
Raw material (kg) is weighed according to weight below:
High melt strength, propylene (HSMPP white particle) 70kg, weight/mass percentage composition is 70%,
Fiber glass reinforced polypropylene master batch (GF/PP master batch, for white particle) 20kg, weight/mass percentage composition is 20%
(wherein GF accounts for the weight/mass percentage composition of GF/PP master batch is 15%),
Foaming agent azodicarbonamide (AC) 7.5kg, weight/mass percentage composition is 7.5%,
The mixture 2.5kg of blowing promotor zinc stearate and zinc oxide, weight/mass percentage composition is 2.5%；
Weighing raw material according to aforementioned proportion, by 70kgHSMPP and 20kgGF/PP master batch mix homogeneously, melt extrude pelletize on the twin screw extruder, extrusion temperature is at 140-160 DEG C；Above-mentioned MODIFIED PP pellet is added 1.8kg liquid paraffin (wherein, PP pellet is 50: 1 with the mass ratio of liquid paraffin), makes pellet surface uniform wet, to reach uniformly to mix；Being subsequently adding 7.5kg azodicarbonamide, 2.5kg zinc stearate and the mixture of zinc oxide, be sufficiently mixed uniformly on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min；Being sent in injection machine by this material mixed, micro foaming injection moulding in the range of foaming agent heat activation temperature, injection temperature, at 160-220 DEG C, i.e. prepares PP microcellular foam material.
Embodiment 12
Raw material (kg) is weighed according to weight below:
High melt strength, propylene (HSMPP white particle) 65kg, weight/mass percentage composition is 65%,
Fiber glass reinforced polypropylene master batch (GF/PP master batch, for white particle) 25kg, weight/mass percentage composition is 25%
(wherein GF accounts for the weight/mass percentage composition of GF/PP master batch is 25%),
Foaming agent azodicarbonamide (AC) 9kg, weight/mass percentage composition is 9%,
Blowing promotor zinc stearate 1kg, weight/mass percentage composition is 1%；
Weighing raw material according to aforementioned proportion, by 65kgHSMPP and 25kgGF/PP master batch mix homogeneously, melt extrude pelletize on the twin screw extruder, extrusion temperature is at 140-160 DEG C；Above-mentioned MODIFIED PP pellet is added 1.8kg liquid paraffin (wherein, PP pellet is 50: 1 with the mass ratio of liquid paraffin), makes pellet surface uniform wet, to reach uniformly to mix；Being subsequently adding 9kg azodicarbonamide, 1kg zinc stearate, be sufficiently mixed uniformly on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min；Being sent in injection machine by this material mixed, micro foaming injection moulding in the range of foaming agent heat activation temperature, injection temperature, at 160-220 DEG C, i.e. prepares PP microcellular foam material.
Table 1
| Performance indications | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Density (g/cm3) | 0.86 | 0.88 | 0.83 |
| Hot strength (MPa) | 31.5 | 30.6 | 32.9 |
| Bending strength (MPa) | 41.2 | 43.5 | 45.8 |
| Bending modulus (MPa) | 1650 | 1825 | 1900 |
| Impact strength (KJ/m2) | 4.50 | 5.95 | 5.36 |
Can be seen that from the data of table 1, the polypropylene microporous expanded material of the present invention uses HSMPP and GF/PP master batch to be raw material, the polypropylene microporous expanded material prepared by fretting map Shooting Technique, density is little, light weight, intensity are good, abscess is little and fine and close, particularly absorbing sound and lowering noise aspect has good effect, has the application prospect of excellence on automotive upholstery.
The above-mentioned description to embodiment is to be understood that for ease of those skilled in the art and apply the present invention.These embodiments obviously easily can be made various amendment by person skilled in the art, and General Principle described herein is applied in other embodiments without through performing creative labour.Therefore, the invention is not restricted to embodiment here, those skilled in the art should be within protection scope of the present invention according to the announcement of the present invention, the improvement made without departing from scope and amendment.
Claims (2)
1. a preparation method for polypropylene microporous expanded material, comprises the following steps:
(1) weighing weight/mass percentage composition is 60～the high melt strength, propylene of 80% and fiber glass reinforced polypropylene master batch mix homogeneously that weight/mass percentage composition is 10～30%; melt extrude pelletize on the twin screw extruder; extrusion temperature is 140～160 DEG C, obtains extruding modified polypropene pellet；
(2) the modified polypropene pellet in step (1) is added liquid paraffin mix homogeneously, polypropylene granules is 25:1～75:1 with the mass ratio of liquid paraffin, being subsequently adding weight/mass percentage composition is 1～the foaming agent of 10% and blowing promotor that weight/mass percentage composition is 0.1～5%, is sufficiently mixed uniformly on homogenizer；
(3) being sent in injection machine by the material mixed in step (2), microporous foam injection mo(u)lding in the range of foaming agent heat activation temperature, wherein injection temperature is 160～220 DEG C, prepares polypropylene microporous expanded material；
Described polypropylene microporous expanded material is made up of the component of following weight/mass percentage composition:
In described fiber glass reinforced polypropylene master batch, glass fibre accounts for the mass ratio of fiber glass reinforced polypropylene master batch is 10～30%；
Described foaming agent is azodicarbonamide；
Described blowing promotor is selected from one or both in zinc oxide or zinc stearate.
The preparation method of polypropylene microporous expanded material the most according to claim 1, it is characterised in that: the rotating speed of described homogenizer is 2000～4000r/min.
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| CN104334626A (en) * | 2012-03-16 | 2015-02-04 | 3M创新有限公司 | Light weight articles, composite compositions, and processes for making the same |
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| CN104194155A (en) * | 2014-08-27 | 2014-12-10 | 南京聚隆科技股份有限公司 | Long-glass-fiber-reinforced polypropylene microfoamed material and preparation method thereof |
| CN104945737B (en) * | 2015-06-27 | 2018-04-27 | 上海俊尔新材料有限公司 | A kind of dedicated glass fiber reinforced polypropylene composite material of high-performance fretting map and preparation method thereof |
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| CN110152387A (en) * | 2019-04-10 | 2019-08-23 | 厦门建霖健康家居股份有限公司 | A kind of pressure-vessel of crack resistence and preparation method thereof |
| CN110054802A (en) * | 2019-05-17 | 2019-07-26 | 郑州大学 | A method of preparing across the scale foam structure material of isotactic polypropylene micro-nano |
| CN111040306A (en) * | 2019-12-30 | 2020-04-21 | 苏州荣昌复合材料有限公司 | Polypropylene material with high barrier property and preparation method thereof |
| CN112409684A (en) * | 2020-11-03 | 2021-02-26 | 临沂利方塑胶制品有限公司 | Processing method of high-strength toy plastic |
| CN113698697A (en) * | 2021-07-15 | 2021-11-26 | 无锡得宇新材料有限公司 | Microporous foam reinforced material and preparation method thereof |
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