CN103102583A - Polypropylene microporous foam material and preparation method thereof - Google Patents
Polypropylene microporous foam material and preparation method thereof Download PDFInfo
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- CN103102583A CN103102583A CN2011103560656A CN201110356065A CN103102583A CN 103102583 A CN103102583 A CN 103102583A CN 2011103560656 A CN2011103560656 A CN 2011103560656A CN 201110356065 A CN201110356065 A CN 201110356065A CN 103102583 A CN103102583 A CN 103102583A
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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
-
- 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
-
- 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
-
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- 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
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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
- B29C2948/92885—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
Abstract
The invention belongs to the technical field of polymers and discloses a polypropylene microporous foam material and a preparation method thereof. The polypropylene microporous foam material comprises, by mass, 60 to 80% of high-melt strength polypropylene, 10 to 30% of glass fiber-reinforced polypropylene master batches, 1 to 10% of a foaming agent and 0.1 to 5% of a foaming assistant. The preparation method adopts a microcellular foam injection molding technology, has simple processes and can be controlled easily. The polypropylene microporous foam material obtained by the preparation method has light weight, good strength, small and dense pores, and good sound-absorption and noise-reduction characteristics, and has an excellent application prospect in the field of automobile interior decorative parts.
Description
Technical field
The invention belongs to technical field of polymer materials, relate to a kind of polypropylene microcellular foam material and preparation method thereof.
Background technology
Polypropylene is abundant due to raw material sources, low price, to be easy to machine-shaping, purposes very extensive; Simultaneously, polypropylene density is low, mechanical property is excellent, shock-resistance, thermotolerance and chemical stability are good, therefore, polypropylene (PP) foam material has resistance toheat preferably, good shock-absorbing capacity, good rigidity, erosion resistance, the easy superior performance such as degraded, is widely used in the aspect such as automotive upholstery, plastic sheets, wrapping material and lagging material and receives people's concern, becomes the focus in the porous plastics industry.
At present, the developed countries such as the U.S., Germany, Japan are just at the Devoting Major Efforts To Developing polypropylene foam material environmentally friendly packing material of polystyrene foamed plastics as an alternative.But because general isotatic polypropylene resin is the linear polymer of partial crystallization, during lower the and extensional flow of its melt strength without the strain hardening phenomenon, melt viscosity is very responsive to temperature condition, do not flow hardly before reaching melt temperature, and melt viscosity sharply descends when surpassing melt temperature, and during foaming, cell wall is easily broken and merges; In addition, heat release during crystalling propylene, melt cooling is slow, and gas easily scatters and disappears, so be difficult to the evenly low polypropylene foam of fine and closely woven, apparent density of moulding abscess.High melt strength, propylene (HMSPP) has good foam performance, good mechanical performance, is the important directions of Future Development.Belgium Montell company is being in the first place in the world aspect exploitation HMSPP always, and the Profax-F814 resin that the said firm released in 1994 is a kind of polypropylene that long-chain branch is specifically designed to foam material that contains, and is the ideal material of preparation foaming product.
Compare with common foam material, microporous foam (MCP) has unique micro pore shape and good mechanical property, be well suited for the expanded articles of very small dimensions, have a wide range of applications in industries such as packing, building, automotive industry, space flight and aviation industry and sports equipments.The polypropylene microcellular foam has attracted increasing concern with its good mechanical property and extensive use, is still waiting to improve but the technique of micro molding is understood.At present, the technology of preparing of polypropylene fine-celled foam (MCPP) mainly adopts dissolved gas supersaturation technology and supercritical technology.Wherein, micropore forms most employing interrupter method, and shaping cycle is long, is unfavorable for suitability for industrialized production; The micropore extruding technology that adopts the SCF technology will be PP foaming field prior development direction from now on.Many leading companys such as U.S. Trexrcellular Plastic Technology, Axiomaties company etc. has been devoted to practical application exploitation and the commercialization of microvesicle technology and has promoted; More domestic colleges and universities and R﹠D institution have also carried out forming method and the theoretical research of cellular plastic in recent years as South China Science ﹠ Engineering University, Chinese Academy of Sciences's chemistry institute, East China University of Science, Hubei University etc.
Chinese patent CN 101792554 A disclose a kind of micro-foaming polypropylene and preparation method thereof, it is main raw material that the method adopts polypropylene, adding microcapsule foamer or the microcapsule foaming master batch of polypropylene weight ratio 0.1-10% is whipping agent, by extrude, injection moulding or compression molding prepare polypropylene foam material, this product density is at 0.05-0.9g/m
3, over-all properties is good; Simultaneously, Chinese patent CN 102146182 A also disclose a kind of PP microporous foam composite manufacture method, the method adopting montmorillonite MODIFIED PP, evenly mix with wood powder, whipping agent and frothing aid by a certain percentage, prepare PP microporous foam/wood flour composite material by injection molding forming method under the twice-die-opening condition.The He Li of Guizhou University etc. adopt the glass fibre of surface modification to fill enhancing microporous foam polypropylene material, studied the impact of glass fibre on the microporous foam Properties of Polypropylene, the comprehensive mechanical property of microporous foam GF/PP system is improved, and microcellular foam material can be applied in more wide field.
Above research and invention have great importance to development and the popularization of expanded polypropylene material, but in process of production, still can have many deficiencies, as complicated in foam process, control and course of processing difficulty, foam structure is inhomogeneous, can't prepare the microcellular foam material of high foamability.
Summary of the invention
Based on the defects of prior art, the purpose of this invention is to provide a kind of polypropylene microcellular foam material, 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.
Another object of the present invention is to provide a kind of preparation method of above-mentioned polypropylene microcellular foam material, and this method complete processing is simple, and equipment investment is lower.
Technical scheme of the present invention is as follows:
The invention provides a kind of polypropylene microcellular foam material, this material is made by the component that comprises following quality percentage composition:
High melt strength, propylene (HSMPP) 60～80%,
Fiber glass reinforced polypropylene master batch (GF/PP master batch) 10～30%,
Whipping agent 1～10%,
Blowing promotor 0.1～5%.
In described fiber glass reinforced polypropylene master batch, to account for the mass ratio of fiber glass reinforced polypropylene master batch be 10～30% to glass fibre.
Described whipping agent is Cellmic C 121.
Described blowing promotor is selected from one or both in zinc oxide or Zinic stearas.
The present invention also provides a kind of preparation method of above-mentioned polypropylene microcellular foam material, and the method comprises the following steps:
(1) taking the quality percentage composition is that 60～80% high melt strength, propylene and quality percentage composition are that 10～30% fiber glass reinforced polypropylene master batch mixes, melt extrude granulation on twin screw extruder, extrusion temperature is 140～160 ℃, obtains extruding the modified polypropene pellet;
(2) add whiteruss to mix the modified polypropene pellet in step (1), the mass ratio of polypropylene granules and whiteruss is 25: 1～75: 1, then adding the quality percentage composition is that 1～10% whipping agent and quality percentage composition are 0.1～5% blowing promotor, fully mixes on homogenizer;
(3) material that mixes in step (2) is sent in injection moulding machine, microporous foam injection moulding in whipping agent heat activation temperature scope, wherein injection temperature is 160～220 ℃, namely prepares the polypropylene microcellular foam material.
The rotating speed of described homogenizer is 2000～4000r/min.
The present invention compares with prior art, has following advantage and beneficial effect:
1, polypropylene microcellular foam material employing HSMPP of the present invention and GF/PP master batch are raw material, both avoided general isotatic polypropylene low because of melt strength, when easily causing foaming, cell wall is easily broken and the problem that merges, is difficult to moulding, the abscess foam materials that evenly fine and closely woven, apparent density is low, simultaneously, the GF/PP master batch also is conducive to the raising of microcellular foam material intensity.
2, the present invention adopt little frothing injection technological process simple, be easy to control, the polypropylene microcellular foam material quality for preparing is light, intensity good, abscess is little and fine and close, and the characteristic with good absorbing sound and lowering noise has excellent application prospect on automotive upholstery.
Description of drawings
Fig. 1 is process flow diagram of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawing illustrated embodiment.
Below fiber glass reinforced polypropylene master batch used buy from Hefei Genius Advanced Materials Co., Ltd..
Embodiment 1
Take raw material (kg) according to following weight:
High melt strength, propylene (HSMPP white particle) 60kg, the quality percentage composition is 60%,
Fiber glass reinforced polypropylene master batch (the GF/PP master batch is white particle) 30kg, the quality percentage composition is 30%
(wherein GF account for the quality percentage composition of GF/PP master batch be 20%),
Whipping agent Cellmic C 121 (AC) 7kg, the quality percentage composition is 7%,
Blowing promotor Zinic stearas 3kg, quality percentage composition are 3%;
Producing the method for this kind polypropylene microcellular foam material: Fig. 1 is process flow diagram.
Take raw material according to aforementioned proportion, 60kgHSMPP and 30kgGF/PP master batch are mixed, melt extrude granulation on twin screw extruder, extrusion temperature is at 140-160 ℃; Above-mentioned MODIFIED PP pellet is added 1.8kg whiteruss (wherein, the mass ratio of PP pellet and whiteruss is 50: 1), make the pellet surface uniform wetting, to reach even mixing; Then add 7kg Cellmic C 121,3kg Zinic stearas, fully mix on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min; This material that mixes is sent in injection moulding machine, and micro foaming injection moulding in whipping agent heat activation temperature scope, injection temperature namely prepare the PP microcellular foam material at 160-220 ℃.Prepared polypropylene microcellular foam material is carried out performance test, and test result sees Table 1.
Embodiment 2
Take raw material (kg) according to following weight:
High melt strength, propylene (HSMPP white particle) 70kg, the quality percentage composition is 70%,
Fiber glass reinforced polypropylene master batch (the GF/PP master batch is white particle) 20kg, the quality percentage composition is 20%
(wherein GF account for the quality percentage composition of GF/PP master batch be 20%),
Whipping agent Cellmic C 121 (AC) 7kg, the quality percentage composition is 7%,
Blowing promotor Zinic stearas 3kg, quality percentage composition are 3%;
Take raw material according to aforementioned proportion, 70kgHSMPP and 20kgGF/PP master batch are mixed, melt extrude granulation on twin screw extruder, extrusion temperature is at 140-160 ℃; Above-mentioned MODIFIED PP pellet is added 3.6kg whiteruss (wherein, the mass ratio of PP pellet and whiteruss is 25: 1), make the pellet surface uniform wetting, to reach even mixing; Then add 7kg Cellmic C 121,3kg Zinic stearas, fully mix on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min; This material that mixes is sent in injection moulding machine, and micro foaming injection moulding in whipping agent heat activation temperature scope, injection temperature namely prepare the PP microcellular foam material at 160-220 ℃.Prepared polypropylene microcellular foam material is carried out performance test, and test result sees Table 1.
Embodiment 3
Take raw material (kg) according to following weight:
High melt strength, propylene (HSMPP white particle) 80kg, the quality percentage composition is 80%,
Fiber glass reinforced polypropylene master batch (the GF/PP master batch is white particle) 10kg, the quality percentage composition is 10%
(wherein GF account for the quality percentage composition of GF/PP master batch be 15%),
Whipping agent Cellmic C 121 (AC) 7kg, the quality percentage composition is 7%,
Blowing promotor zinc oxide 3kg, quality percentage composition are 3%;
Take raw material according to aforementioned proportion, 80kgHSMPP and 10kgGF/PP master batch are mixed, melt extrude granulation on twin screw extruder, extrusion temperature is at 140-160 ℃; Above-mentioned MODIFIED PP pellet is added 1.2kg whiteruss (wherein, the mass ratio of PP pellet and whiteruss is 75: 1), make the pellet surface uniform wetting, to reach even mixing; Then add 7kg Cellmic C 121,3kg zinc oxide, fully mix on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min; This material that mixes is sent in injection moulding machine, and micro foaming injection moulding in whipping agent heat activation temperature scope, injection temperature namely prepare the PP microcellular foam material at 160-220 ℃.Prepared polypropylene microcellular foam material is carried out performance test, and test result sees Table 1.
Embodiment 4
Take raw material (kg) according to following weight:
High melt strength, propylene (HSMPP white particle) 80kg, the quality percentage composition is 80%,
Fiber glass reinforced polypropylene master batch (the GF/PP master batch is white particle) 18kg, the quality percentage composition is 18%
(wherein GF account for the quality percentage composition of GF/PP master batch be 25%),
Whipping agent Cellmic C 121 (AC) 1kg, the quality percentage composition is 1%,
Blowing promotor zinc oxide 1kg, quality percentage composition are 1%;
Take raw material according to aforementioned proportion, 80kgHSMPP and 18kgGF/PP master batch are mixed, melt extrude granulation on twin screw extruder, extrusion temperature is at 140-160 ℃; Above-mentioned MODIFIED PP pellet is added 1.96kg whiteruss (wherein, the mass ratio of PP pellet and whiteruss is 50: 1), make the pellet surface uniform wetting, to reach even mixing; Then add 1kg Cellmic C 121,1kg zinc oxide, fully mix on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min; This material that mixes is sent in injection moulding machine, and micro foaming injection moulding in whipping agent heat activation temperature scope, injection temperature namely prepare the PP microcellular foam material at 160-220 ℃.
Embodiment 5
Take raw material (kg) according to following weight:
High melt strength, propylene (HSMPP white particle) 70kg, the quality percentage composition is 70%,
Fiber glass reinforced polypropylene master batch (the GF/PP master batch is white particle) 18kg, the quality percentage composition is 18%
(wherein GF account for the quality percentage composition of GF/PP master batch be 20%),
Whipping agent Cellmic C 121 (AC) 10kg, the quality percentage composition is 10%,
Blowing promotor Zinic stearas 2kg, quality percentage composition are 2%;
Take raw material according to aforementioned proportion, 70kgHSMPP and 18kgGF/PP master batch are mixed, melt extrude granulation on twin screw extruder, extrusion temperature is at 140-160 ℃; Above-mentioned MODIFIED PP pellet is added 1.76kg whiteruss (wherein, the mass ratio of PP pellet and whiteruss is 50: 1), make the pellet surface uniform wetting, to reach even mixing; Then add 10kg Cellmic C 121,2kg Zinic stearas, fully mix on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min; This material that mixes is sent in injection moulding machine, and micro foaming injection moulding in whipping agent heat activation temperature scope, injection temperature namely prepare the PP microcellular foam material at 160-220 ℃.
Embodiment 6
Take raw material (kg) according to following weight:
High melt strength, propylene (HSMPP white particle) 70kg, the quality percentage composition is 70%,
Fiber glass reinforced polypropylene master batch (the GF/PP master batch is white particle) 25kg, the quality percentage composition is 25%
(wherein GF account for the quality percentage composition of GF/PP master batch be 10%),
Whipping agent Cellmic C 121 (AC) 4.9kg, the quality percentage composition is 4.9%;
Blowing promotor Zinic stearas 0.1kg, quality percentage composition are 0.1%;
Take raw material according to aforementioned proportion, 70kgHSMPP and 25kgGF/PP master batch are mixed, melt extrude granulation on twin screw extruder, extrusion temperature is at 140-160 ℃; Above-mentioned MODIFIED PP pellet is added 1.9kg whiteruss (wherein, the mass ratio of PP pellet and whiteruss is 50: 1), make the pellet surface uniform wetting, to reach even mixing; Then add 4.9kg Cellmic C 121,0.1kg Zinic stearas, fully mix on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min; This material that mixes is sent in injection moulding machine, and micro foaming injection moulding in whipping agent heat activation temperature scope, injection temperature namely prepare the PP microcellular foam material at 160-220 ℃.
Embodiment 7
Take raw material (kg) according to following weight:
High melt strength, propylene (HSMPP white particle) 65kg, the quality percentage composition is 65%,
Fiber glass reinforced polypropylene master batch (the GF/PP master batch is white particle) 20kg, the quality percentage composition is 20%
(wherein GF account for the quality percentage composition of GF/PP master batch be 30%),
Whipping agent Cellmic C 121 (AC) 10kg, the quality percentage composition is 10%,
The mixture 5kg of blowing promotor Zinic stearas and zinc oxide, quality percentage composition are 5%;
Take raw material according to aforementioned proportion, 65kgHSMPP and 20kgGF/PP master batch are mixed, melt extrude granulation on twin screw extruder, extrusion temperature is at 140-160 ℃; Above-mentioned MODIFIED PP pellet is added 1.7kg whiteruss (wherein, the mass ratio of PP pellet and whiteruss is 50: 1), make the pellet surface uniform wetting, to reach even mixing; Then add the mixture of 10kg Cellmic C 121,5kg Zinic stearas and zinc oxide, fully mix on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min; This material that mixes is sent in injection moulding machine, and micro foaming injection moulding in whipping agent heat activation temperature scope, injection temperature namely prepare the PP microcellular foam material at 160-220 ℃.
Embodiment 8
Take raw material (kg) according to following weight:
High melt strength, propylene (HSMPP white particle) 70kg, the quality percentage composition is 70%,
Fiber glass reinforced polypropylene master batch (the GF/PP master batch is white particle) 20kg, the quality percentage composition is 20%
(wherein GF account for the quality percentage composition of GF/PP master batch be 20%),
Whipping agent Cellmic C 121 (AC) 7.5kg, the quality percentage composition is 7.5%,
Blowing promotor Zinic stearas 2.5kg, quality percentage composition are 2.5%;
Take raw material according to aforementioned proportion, 70kgHSMPP and 20kgGF/PP master batch are mixed, melt extrude granulation on twin screw extruder, extrusion temperature is at 140-160 ℃; Above-mentioned MODIFIED PP pellet is added 1.8kg whiteruss (wherein, the mass ratio of PP pellet and whiteruss is 50: 1), make the pellet surface uniform wetting, to reach even mixing; Then add 7.5kg Cellmic C 121,2.5kg Zinic stearas, fully mix on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min; This material that mixes is sent in injection moulding machine, and micro foaming injection moulding in whipping agent heat activation temperature scope, injection temperature namely prepare the PP microcellular foam material at 160-220 ℃.
Embodiment 9
Take raw material (kg) according to following weight:
High melt strength, propylene (HSMPP white particle) 70kg, the quality percentage composition is 70%,
Fiber glass reinforced polypropylene master batch (the GF/PP master batch is white particle) 20kg, the quality percentage composition is 20%
(wherein GF account for the quality percentage composition of GF/PP master batch be 30%),
Whipping agent Cellmic C 121 (AC) 9kg, the quality percentage composition is 9%,
Blowing promotor zinc oxide 1kg, quality percentage composition are 1%;
Take raw material according to aforementioned proportion, 70kgHSMPP and 20kgGF/PP master batch are mixed, melt extrude granulation on twin screw extruder, extrusion temperature is at 140-160 ℃; Above-mentioned MODIFIED PP pellet is added 1.8kg whiteruss (wherein, the mass ratio of PP pellet and whiteruss is 50: 1), make the pellet surface uniform wetting, to reach even mixing; Then add 9kg Cellmic C 121,1kg zinc oxide, fully mix on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min; This material that mixes is sent in injection moulding machine, and micro foaming injection moulding in whipping agent heat activation temperature scope, injection temperature namely prepare the PP microcellular foam material at 160-220 ℃.
Embodiment 10
Take raw material (kg) according to following weight:
High melt strength, propylene (HSMPP white particle) 70kg, the quality percentage composition is 70%,
Fiber glass reinforced polypropylene master batch (the GF/PP master batch is white particle) 18kg, the quality percentage composition is 18%
(wherein GF account for the quality percentage composition of GF/PP master batch be 20%),
Whipping agent Cellmic C 121 (AC) 10kg, the quality percentage composition is 10%,
Blowing promotor zinc oxide 2kg, quality percentage composition are 2%;
Take raw material according to aforementioned proportion, 70kgHSMPP and 18kgGF/PP master batch are mixed, melt extrude granulation on twin screw extruder, extrusion temperature is at 140-160 ℃; Above-mentioned MODIFIED PP pellet is added 1.76kg whiteruss (wherein, the mass ratio of PP pellet and whiteruss is 50: 1), make the pellet surface uniform wetting, to reach even mixing; Then add 10kg Cellmic C 121,2kg zinc oxide, fully mix on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min; This material that mixes is sent in injection moulding machine, and micro foaming injection moulding in whipping agent heat activation temperature scope, injection temperature namely prepare the PP microcellular foam material at 160-220 ℃.
Embodiment 11
Take raw material (kg) according to following weight:
High melt strength, propylene (HSMPP white particle) 70kg, the quality percentage composition is 70%,
Fiber glass reinforced polypropylene master batch (the GF/PP master batch is white particle) 20kg, the quality percentage composition is 20%
(wherein GF account for the quality percentage composition of GF/PP master batch be 15%),
Whipping agent Cellmic C 121 (AC) 7.5kg, the quality percentage composition is 7.5%,
The mixture 2.5kg of blowing promotor Zinic stearas and zinc oxide, quality percentage composition are 2.5%;
Take raw material according to aforementioned proportion, 70kgHSMPP and 20kgGF/PP master batch are mixed, melt extrude granulation on twin screw extruder, extrusion temperature is at 140-160 ℃; Above-mentioned MODIFIED PP pellet is added 1.8kg whiteruss (wherein, the mass ratio of PP pellet and whiteruss is 50: 1), make the pellet surface uniform wetting, to reach even mixing; Then add the mixture of 7.5kg Cellmic C 121,2.5kg Zinic stearas and zinc oxide, fully mix on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min; This material that mixes is sent in injection moulding machine, and micro foaming injection moulding in whipping agent heat activation temperature scope, injection temperature namely prepare the PP microcellular foam material at 160-220 ℃.
Embodiment 12
Take raw material (kg) according to following weight:
High melt strength, propylene (HSMPP white particle) 65kg, the quality percentage composition is 65%,
Fiber glass reinforced polypropylene master batch (the GF/PP master batch is white particle) 25kg, the quality percentage composition is 25%
(wherein GF account for the quality percentage composition of GF/PP master batch be 25%),
Whipping agent Cellmic C 121 (AC) 9kg, the quality percentage composition is 9%,
Blowing promotor Zinic stearas 1kg, quality percentage composition are 1%;
Take raw material according to aforementioned proportion, 65kgHSMPP and 25kgGF/PP master batch are mixed, melt extrude granulation on twin screw extruder, extrusion temperature is at 140-160 ℃; Above-mentioned MODIFIED PP pellet is added 1.8kg whiteruss (wherein, the mass ratio of PP pellet and whiteruss is 50: 1), make the pellet surface uniform wetting, to reach even mixing; Then add 9kg Cellmic C 121,1kg Zinic stearas, fully mix on homogenizer, wherein, the rotating speed of homogenizer is at 2000-4000r/min; This material that mixes is sent in injection moulding machine, and micro foaming injection moulding in whipping agent heat activation temperature scope, injection temperature namely prepare the PP microcellular foam material at 160-220 ℃.
Table 1
| Performance index | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Density (g/cm 3) | 0.86 | 0.88 | 0.83 |
| Tensile strength (MPa) | 31.5 | 30.6 | 32.9 |
| Flexural strength (MPa) | 41.2 | 43.5 | 45.8 |
| Modulus in flexure (MPa) | 1650 | 1825 | 1900 |
| Shock strength (KJ/m 2) | 4.50 | 5.95 | 5.36 |
Can find out from the data of table 1, it is raw material that polypropylene microcellular foam material of the present invention adopts HSMPP and GF/PP master batch, the polypropylene microcellular foam material for preparing by little frothing injection technique, density is little, quality is light, intensity is good, abscess is little and fine and close, particularly the absorbing sound and lowering noise aspect has good effect, has excellent application prospect on automotive upholstery.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and in the General Principle of this explanation is applied to other embodiment and needn't pass through performing creative labour.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not breaking away from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (6)
1. polypropylene microcellular foam material, it is characterized in that: this material is made by the component that comprises following quality percentage composition:
High melt strength, propylene 60～80%,
Fiber glass reinforced polypropylene master batch 10～30%,
Whipping agent 1～10%,
Blowing promotor 0.1～5%.
2. polypropylene microcellular foam material according to claim 1 is characterized in that: in described fiber glass reinforced polypropylene master batch, to account for the mass ratio of fiber glass reinforced polypropylene master batch be 10～30% to glass fibre.
3. polypropylene microcellular foam material according to claim 1, it is characterized in that: described whipping agent is Cellmic C 121.
4. polypropylene microcellular foam material according to claim 1, it is characterized in that: described blowing promotor is selected from one or both in zinc oxide or Zinic stearas.
5. the preparation method of the arbitrary described polypropylene microcellular foam material of claim 1 to 4, it is characterized in that: the method comprises the following steps:
(1) taking the quality percentage composition is that 60～80% high melt strength, propylene and quality percentage composition are that 10～30% fiber glass reinforced polypropylene master batch mixes, melt extrude granulation on twin screw extruder, extrusion temperature is 140～160 ℃, obtains extruding the modified polypropene pellet;
(2) add whiteruss to mix the modified polypropene pellet in step (1), the mass ratio of polypropylene granules and whiteruss is 25: 1～75: 1, then adding the quality percentage composition is that 1～10% whipping agent and quality percentage composition are 0.1～5% blowing promotor, fully mixes on homogenizer;
(3) material that mixes in step (2) is sent in injection moulding machine, microporous foam injection moulding in whipping agent heat activation temperature scope, wherein injection temperature is 160～220 ℃, prepares the polypropylene microcellular foam material.
6. the preparation method of polypropylene microcellular foam material according to claim 5, it is characterized in that: the rotating speed of described homogenizer is 2000～4000r/min.
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| US20150102528A1 (en) * | 2012-03-16 | 2015-04-16 | 3M Innovative Properties Company | Light weight articles, composite compositions, and processes for making the same |
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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 |
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| 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 |
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