CN108530746A - A kind of preparation method based on draft flowing deformation technology foaming polypropylene sheet - Google Patents
A kind of preparation method based on draft flowing deformation technology foaming polypropylene sheet Download PDFInfo
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- 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
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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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
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- 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
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- 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
- C08J9/0066—Use of inorganic compounding ingredients
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- 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
- C08J2205/00—Foams characterised by their properties
- C08J2205/04—Foams characterised by their properties characterised by the foam pores
- C08J2205/05—Open cells, i.e. more than 50% of the pores are open
-
- 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
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- 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
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/14—Copolymers of propene
-
- 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
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—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
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
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- 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
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—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
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/12—Polypropene
-
- 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
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—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
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/14—Copolymers of propene
Abstract
The present invention discloses a kind of preparation method based on draft flowing deformation technology foaming polypropylene sheet, includes the following steps：1. premixing：High mixer premixing is added in homopolypropylene, copolymer polypropylene, melt enhancing master batch, foaming nucleation agent, chemical foaming agent, lubricant etc.；2. foaming：The material of premixing is added to draft flowing deformation and is plasticized extrusion equipment to be plasticized, and the gas after foaming agent decomposition is allowed to be dispersed in melt polypropylene, can be obtained foaming polypropylene sheet through three roller roll-ins after foamed sheet die extrusion.The foaming polypropylene sheet prepared by the method for the invention squeezes out expanded material obtained compared with classic screw equipment, and uniform foam cell is fine and closely woven, expansion ratio is high low with percent opening, the excellent in mechanical performance of product simultaneously, simple production process, it is at low cost, it is suitable for industrial mass production.
Description
Technical field
The invention belongs to polymeric material fields, and in particular to a kind of based on draft flowing deformation technology foaming polypropylene sheet
Preparation method.The process equipment of high molecular material of the present invention is that South China Science ＆ Engineering University's polymer novel forming equipment national project is ground
Study carefully center Qu Jinping professor last word patent --- the high polymer material plasticizing transportation method based on draft flowing deformation and equipment（Specially
Profit CN100496927C）.It has low energy consumption, weak shearing, conveying capacity strong, mixed compared with traditional spiro rod plasticizing equipment
The features such as conjunction is uniformly dispersed.
Background technology
The heat resisting temperature of expanded polystyrene (EPS) and polyethylene is 80 DEG C or so, and expanded polypropylene (PP) is with its good power
Performance, excellent heat resistance (maximum operation (service) temperature is up to 120 DEG C) and the property conducive to environmental protection are learned, at present by as replacement
The green material of expanded polystyrene (EPS), and it has been applied to the fields such as packaging, heat-barrier material and automobile.
But since PP is semicrystalline polymer, compared with amorphous polymer foam, foam structure is difficult to control；This
Outside, the melt strength of PP is very low, very sensitive to temperature change；And do not have very high strain hardening, and this is later stage bubble
Necessary to the growth of hole.Therefore, using PP it is difficult to be made that uniform foam cell is fine and closely woven, the high foam low with percent opening of expansion ratio.Mesh
Before, the preparation of domestic and international PP foams mostly uses multistage technique, batch process, or uses complicated extrusion device such as tandem extruder,
Or with the special extruder for lengthening machine head port mould, or by the melt strength of the high PP of the methods of crosslinking, blending, grafting, or use
Physical blowing agent by metering pump in an extruder between high pressure be pumped into gas and foam；These technical matters long flow path, techniques
Complexity, device-specific is strong, production link is more, technical difficulty is big, is unfavorable for promoting.It is disclosed in Chinese patent CN1346843A
A kind of acrylic resin of the preparation of radiation crosslinked polypropylene alkene expanded material is a kind of radiation resistance polypropylene of speciality, and temperature is blended
Sheet material after more a height of 160-200 DEG C of degree is placed and could be foamed for a period of time, and the period is longer, and large-scale production is more difficult.
Chinese patent CN101538387A discloses a kind of PP foam material and its production method, and this method uses supercritical fluid
As foaming agent, since Supercritical Conditions are unstable, it is difficult to which for conveying and measuring, therefore extrusion and foaming process is not steady enough
It is fixed, it is difficult to ensure large-scale production.
Therefore, it is necessary to develop, a kind of excellent material performance, processing performance is good, technological process is simple, production efficiency is high
Micro-foaming polypropylene sheet and preparation method thereof is existing to solve the problems, such as.
Invention content
Insufficient in view of the prior art, the purpose of the present invention is to provide one kind being based on draft flowing deformation technology expanded polypropylene
The preparation method of plank, excellent material performance, processing performance are good, technological process is simple, production efficiency is high.
To achieve the goals above, the present invention is based on the preparation methods of draft flowing deformation technology foaming polypropylene sheet, specifically
Steps are as follows：
1. by the mixing of homopolypropylene or random copolymerization propylene or homopolypropylene and random copolymerization propylene that parts by weight are 100
The change that foaming nucleation agent that melt that object, parts by weight are 1~10 enhancing master batch, parts by weight are 0.1~2, parts by weight are 0.1~2
Learn foaming agent, the lubricant that parts by weight are 0.1~1 is pre-mixed；
2. foaming：The material of premixing is added to draft flowing deformation plasticizing extrusion equipment to be plasticized, foamed sheet material mouth
After mould squeezes out, then through three roller roll-ins obtain foaming polypropylene sheet.
The draft flowing deformation plasticizing extrusion equipment is that eccentric rotor draft flowing deformation is plasticized extrusion equipment, and root diameter is
60mm, draw ratio be 20~25, ancillary equipment use sheet material extrusion die head and calendering formation equipment, extruder temperature be 150~
250 DEG C, die head temperature is 150~200 DEG C, and rotor speed is 10~150 revs/min, and feeder rotating speed is 10~100 revs/min
Clock.
Mixture total amount based on the homopolypropylene and random copolymerization propylene is 100 weight %, the homopolypropylene
Weight ratio（Content range）For 0.1 weight of weight %~99.9 %, the weight ratio of the random copolymerization propylene（Content range）For
99.9 weight of weight %~0.1 %.
The melt enhancing master batch is the compound of ethylene-octene copolymer, polyethylene, is plasticized and is squeezed out by draft flowing deformation
Equipment is made.
The foaming nucleation agent is one in talcum powder, sodium benzoate, calcium carbonate, titanium dioxide, montmorillonite, silica
Kind is two or more.
The chemical foaming agent is azodicarbonamide, azo isobutyronitrile, two diisopropyl carbonate of azo, dinitroso
Five methine tetramines, unifor, to sulfohydrazide diphenyl ether, p-toluene sulfonylsemicarbazide, sodium bicarbonate, ammonium carbonate, carbon
The one or more of sour hydrogen ammonium, zinc stearate, zinc oxide.
The lubricant is that the lubricant is stearic acid, stearate, strand Shang You long-chain fats race base
The one or more of ester type compound, paraffin.
Foaming polypropylene sheet, which is characterized in that be based on draft flowing deformation using any described one kind of claim 1 to 6
The obtained plank of preparation method of technology foaming polypropylene sheet.
Compared with prior art, the advance of preparation method of the present invention is that fusion plastification is uniformly mixed molding mode and uses
Molding mode based on draft flowing deformation.Traditional screw apparatus there is larger shear action, can reduce material performance and
Melt strength, particularly with semicrystalline polymer PP, melt strength is very low, causes foaming effect poor, expansion ratio is low；And it draws
Rheology plasticizing extrusion equipment is stretched, plasticizing principle is based on draft flowing deformation, and the elongational viscosity after polymer melting can be than cutting
Big 1 ~ 2 order of magnitude of viscosity is cut, while extrusion system internal element has higher melt pressure, effectively bubble can be inhibited to increase
Gas loss in the process, while improving the quality of the mixing and diffusion of gas in the melt, can form that abscess-size is small, abscess
Equally distributed ideal foam structure.
It advantages of the present invention and has the beneficial effect that：
1, the present invention using draft flowing deformation plasticizing extrusion equipment prepare foaming polypropylene sheet uniform foam cell is fine and closely woven, expansion ratio
It is high low with percent opening；
2, for the present invention using the preparation method of draft flowing deformation plasticizing extrusion equipment, auxiliary, which adds a small amount of melt, enhances master batch, just can
PP melt strengths are significantly improved, production process height is continuous and stablizes, yields is high, the safe non-environmental-pollution of production process, fits
Close industrial-scale production；
3, foaming polypropylene sheet prepared by the present invention is non-crosslinking structure, can recycle profit according to general polypropylene modified material
With, do not cause secondary pollution, meet be recycled economy requirement.
Description of the drawings
The following drawings are only intended to schematically illustrate and explain the present invention, not delimit the scope of the invention.Wherein：
Fig. 1 is the stereoscan photograph of 1 obtained polypropylene foam plank of embodiment；
Fig. 2 is the stereoscan photograph of the polypropylene foam plank of comparative example 1.
Specific implementation mode
In order to further explain the technical solution of the present invention, being explained in detail the present invention below by specific embodiment
It states.
The manufacturer of vistanex and model in various embodiments of the present invention：
Homopolypropylene：Sinopec Refinery of Maoming Petrochemical Corporation, PPH-T03, melting means 3；
Copolymer polypropylene：Sinopec Refinery of Maoming Petrochemical Corporation, EPS30R, melting means 2；
Melt enhances master batch：The compound of ethylene-octene copolymer, polyethylene is plasticized extrusion equipment by draft flowing deformation and is made.
The performance test methods of the foaming polypropylene sheet prepared in embodiment 1-6 and comparative example：
Abscess-size：SEM abscess pattern photos are handled by image analysis software (Image J5.0), and statistics calculates in turn
It obtains.
Expansion ratio：The ratio of the density of product after the averag density of unexpanded sample and foaming.
Density：It is tested according to ASTM D 792-2000 (i.e. drainage), at least 5 are chosen under identical conditions
A sample is tested, its average value is then taken.
Tensile strength：Dumbbell shape batten is made according to 1040.1 standards of GB/T in foaming plate, tests mechanical property.
Embodiment 1
Take each substance of following parts by weight：100 parts of homopolypropylene, then add 10 parts of melt enhancing master batch, 1 part be foamed into
Core agent, 1 part of chemical foaming agent and 0.5 part of lubricant etc. sequentially add mixing machine premixing, stirring, mixing temperature 30
DEG C, mixing machine rotating speed is 500 revs/min, and incorporation time is 5 minutes；
The material of premixing is put into draft flowing deformation and is plasticized extrusion equipment, draft flowing deformation is plasticized each section of processing temperature of extrusion equipment
Be set separately 160 DEG C of first segment, 185 DEG C of second segment, 200 DEG C of third section, the 4th section 200 DEG C, the 5th section 190 DEG C, die head temperature
175 DEG C, die openings 1.0mm, mouth mold width is 300mm, and rotor draw ratio is 22, and rotor speed is 30 revs/min, feeding
Machine rotating speed is 15 revs/min, and after foamed sheet die squeezes out, the polypropylene expanded plate of extrusion is rolled by three roller arrangements
The polypropylene expanded plate thickness of type, extrusion molding is 2.4mm.
The performance of polypropylene expanded plate is tested, test result is shown in Table 1, and the microcosmic scanning electron microscope of the polypropylene expanded plate of gained is shone
Piece is with reference to figure 1.Even if it can be found that the polypropylene expanded plate of the present invention relative to using close to the material that matches of the present invention but
It is obviously improved using cell density, cell size and the uniformity of the polypropylene expanded plate of traditional handicraft.
Embodiment 2
Take each substance of following parts by weight：100 parts of homopolypropylene and random copolymerization propylene mixtures（Weight ratio is 8：2）, then
The melt of 6 parts of addition enhances master batch, 1 part of foaming nucleation agent, 1 part of chemical foaming agent and 0.5 part of lubricant, sequentially adds
Mixing machine premixing, stirring, mixing temperature are 30 DEG C, and mixing machine rotating speed is 500 revs/min, and incorporation time is 5 minutes；
The material of premixing is put into draft flowing deformation and is plasticized extrusion equipment, draft flowing deformation is plasticized each section of processing temperature of extrusion equipment
Be set separately 160 DEG C of first segment, 185 DEG C of second segment, 200 DEG C of third section, the 4th section 200 DEG C, the 5th section 190 DEG C, die head temperature
175 DEG C, die openings 1.0mm, mouth mold width is 300mm, and rotor draw ratio is 22, and rotor speed is 40 revs/min, feeding
Machine rotating speed is 20 revs/min, and after foamed sheet die squeezes out, the polypropylene expanded plate of extrusion is rolled by three roller arrangements
The polypropylene expanded plate thickness of type, extrusion molding is 2.4mm.
The performance of polypropylene expanded plate is tested, test result is shown in Table 1.
Embodiment 3
Take each substance of following parts by weight：100 parts of homopolypropylene and random copolymerization propylene mixtures（Weight ratio is 6：4）, then
The melt enhancing master batch of 5 parts of addition, 1 part of foaming nucleation agent, 1 part of chemical foaming agent, 0.5 part of lubricant add successively
Enter mixing machine premixing, stirring, mixing temperature is 30 DEG C, and mixing machine rotating speed is 500 revs/min, and incorporation time is 5 minutes；
The material of premixing is put into draft flowing deformation and is plasticized extrusion equipment, draft flowing deformation is plasticized each section of processing temperature of extrusion equipment
Be set separately 160 DEG C of first segment, 185 DEG C of second segment, 200 DEG C of third section, the 4th section 200 DEG C, the 5th section 190 DEG C, die head temperature
175 DEG C, die openings 1.0mm, mouth mold width is 300mm, and rotor draw ratio is 22, and rotor speed is 60 revs/min, feeding
Machine rotating speed is 30 revs/min, and after foamed sheet die squeezes out, the polypropylene expanded plate of extrusion is rolled by three roller arrangements
The polypropylene expanded plate thickness of type, extrusion molding is 2.4mm.
The performance of polypropylene expanded plate is tested, test result is shown in Table 1.
Embodiment 4
Take each substance of following parts by weight：100 parts of homopolypropylene and random copolymerization propylene mixtures（Weight ratio is 3：7）, then
The melt enhancing master batch of 4 parts of addition, 1 part of foaming nucleation agent, 1.5 parts of chemical foaming agent, 0.5 part of lubricant, successively
Mixing machine premixing, stirring is added, mixing temperature is 30 DEG C, and mixing machine rotating speed is 500 revs/min, and incorporation time is 5 minutes；
The material of premixing is put into draft flowing deformation and is plasticized extrusion equipment, draft flowing deformation is plasticized each section of processing temperature of extrusion equipment
Be set separately 160 DEG C of first segment, 185 DEG C of second segment, 200 DEG C of third section, the 4th section 200 DEG C, the 5th section 190 DEG C, die head temperature
175 DEG C, die openings 1.0mm, mouth mold width is 300mm, and rotor draw ratio is 22, and rotor speed is 75 revs/min, feeding
Machine rotating speed is 35 revs/min, and after foamed sheet die squeezes out, the polypropylene expanded plate of extrusion is rolled by three roller arrangements
The polypropylene expanded plate thickness of type, extrusion molding is 2.4mm.
The performance of polypropylene expanded plate is tested, test result is shown in Table 1.
Embodiment 5
Take each substance of following parts by weight：100 parts of homopolypropylene and random copolymerization propylene mixtures（Weight ratio is 4：6）, then
The melt enhancing master batch of 4 parts of addition, 1 part of foaming nucleation agent, 1.5 parts of chemical foaming agent, 0.5 part of lubricant, successively
Mixing machine premixing, stirring is added, mixing temperature is 30 DEG C, and mixing machine rotating speed is 500 revs/min, and incorporation time is 5 minutes；
The material of premixing is put into draft flowing deformation and is plasticized extrusion equipment, draft flowing deformation is plasticized each section of processing temperature of extrusion equipment
Be set separately 160 DEG C of first segment, 185 DEG C of second segment, 200 DEG C of third section, the 4th section 200 DEG C, the 5th section 190 DEG C, die head temperature
175 DEG C, die openings 1.0mm, mouth mold width is 300mm, and rotor draw ratio is 22, and rotor speed is 100 revs/min, is fed
Material machine rotating speed is 55 revs/min, and after foamed sheet die squeezes out, the polypropylene expanded plate of extrusion is rolled by three roller arrangements
The polypropylene expanded plate thickness of type, extrusion molding is 2.4mm.
The performance of polypropylene expanded plate is tested, test result is shown in Table 1.
Embodiment 6
Take each substance of following parts by weight：100 parts of random copolymerization propylene, then add 3 parts of melt enhancing master batch, 1 part of foaming
Nucleating agent, 1.5 parts of chemical foaming agent, 0.5 part of lubricant sequentially add mixing machine premixing, stirring, and mixing temperature is
30 DEG C, mixing machine rotating speed is 500 revs/min, and incorporation time is 5 minutes；
The material of premixing is put into draft flowing deformation and is plasticized extrusion equipment, draft flowing deformation is plasticized each section of processing temperature of extrusion equipment
Be set separately 160 DEG C of first segment, 185 DEG C of second segment, 200 DEG C of third section, the 4th section 200 DEG C, the 5th section 190 DEG C, die head temperature
175 DEG C, die openings 1.0mm, mouth mold width is 300mm, and rotor draw ratio is 22, and rotor speed is 120 revs/min, is fed
Material machine rotating speed is 68 revs/min, and after foamed sheet die squeezes out, the polypropylene expanded plate of extrusion is rolled by three roller arrangements
The polypropylene expanded plate thickness of type, extrusion molding is 2.4mm.
The performance of polypropylene expanded plate is tested, test result is shown in Table 1.
Comparative example 1
Each substance for taking parts by weight same as Example 2 sequentially adds mixing machine premixing, stirring, and mixing temperature is 30 DEG C, is mixed
Conjunction machine rotating speed is 500 revs/min, and incorporation time is 5 minutes；
The material of premixing is put into the single screw extrusion machine that screw diameter is 65mm, each section of processing temperature of extruder is set respectively
Determine 180 DEG C of first segment, 190 DEG C of second segment, 200 DEG C of third section, the 4th section 180 DEG C, 175 DEG C of die head temperature, die openings are
1.0mm, mouth mold width are 500mm, and draw ratio 32, rotating speed is 60 revs/min, and feeder rotating speed is 30 revs/min, extrusion
For polypropylene expanded plate by three roller arrangement roll-formings, the polypropylene expanded plate thickness of extrusion molding is 2.2mm.
The performance of polypropylene expanded plate is tested, test result is shown in Table 1.
Physical property measured by the specific material formula and sample of the various embodiments described above and comparative example is shown in Table 1.
1 each embodiment group parts by weight of table and performance
Although above the present invention is described in detail with a general description of the specific embodiments, in this hair
On the basis of bright, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore, exist
Without departing from these modifications or improvements on the basis of spirit of that invention, the scope of protection of present invention is belonged to.
Claims (7)
1. a kind of preparation method based on draft flowing deformation technology foaming polypropylene sheet, which is characterized in that this method includes as follows
Step：
1. by the mixing of homopolypropylene or random copolymerization propylene or homopolypropylene and random copolymerization propylene that parts by weight are 100
The change that foaming nucleation agent that melt that object, parts by weight are 1~10 enhancing master batch, parts by weight are 0.1~2, parts by weight are 0.1~2
Learn foaming agent, the lubricant that parts by weight are 0.1~1 is pre-mixed；
2. foaming：The material of premixing is added to draft flowing deformation plasticizing extrusion equipment to be plasticized, foamed sheet material mouth
After mould squeezes out, then through three roller roll-ins obtain foaming polypropylene sheet.
2. a kind of preparation method based on draft flowing deformation technology polyolefin sheet according to claim 1, feature
It is, the draft flowing deformation plasticizing extrusion equipment is that eccentric rotor draft flowing deformation is plasticized extrusion equipment.
3. a kind of preparation method based on draft flowing deformation technology foaming polypropylene sheet according to claim 1, feature
It is, the melt enhancing master batch is the compound of ethylene-octene copolymer and polyethylene, is squeezed out and is set by draft flowing deformation plasticizing
It prepares.
4. a kind of preparation method based on draft flowing deformation technology foaming polypropylene sheet according to claim 1, feature
It is, the foaming nucleation agent is one kind in talcum powder, sodium benzoate, calcium carbonate, titanium dioxide, montmorillonite, silica
Or it is two or more.
5. a kind of preparation method based on draft flowing deformation technology foaming polypropylene sheet according to claim 1, feature
It is, the chemical foaming agent is azodicarbonamide, azo isobutyronitrile, two diisopropyl carbonate of azo, dinitroso five times
Tetramine, unifor, to sulfohydrazide diphenyl ether, p-toluene sulfonylsemicarbazide, sodium bicarbonate, ammonium carbonate, bicarbonate
Ammonium, zinc stearate, zinc oxide it is one or more more than.
6. a kind of preparation method based on draft flowing deformation technology foaming polypropylene sheet according to claim 1, feature
It is, the lubricant is in stearic acid, stearate, the ester type compound of strand Shang You long-chain fats race base, paraffin
It is one or more kinds of.
7. foaming polypropylene sheet, which is characterized in that be based on draft flowing deformation skill using any described one kind of claim 1 to 6
The obtained plank of preparation method of art foaming polypropylene sheet.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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