CN104974419A - Foamed polypropylene pre-mixed material and preparation method thereof - Google Patents

Foamed polypropylene pre-mixed material and preparation method thereof Download PDF

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Publication number
CN104974419A
CN104974419A CN201410149379.2A CN201410149379A CN104974419A CN 104974419 A CN104974419 A CN 104974419A CN 201410149379 A CN201410149379 A CN 201410149379A CN 104974419 A CN104974419 A CN 104974419A
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polypropylene
irradiation
copolymer
preblend
mass parts
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CN201410149379.2A
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Chinese (zh)
Inventor
柯卓
魏玉函
张宝强
邱敦瑞
左胜武
袁小亮
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China Petroleum and Chemical Corp
Sinopec Yangzi Petrochemical Co Ltd
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China Petroleum and Chemical Corp
Sinopec Yangzi Petrochemical Co Ltd
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Priority to CN201410149379.2A priority Critical patent/CN104974419A/en
Publication of CN104974419A publication Critical patent/CN104974419A/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/28—Treatment by wave energy or particle radiation
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • 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
    • C08J2323/16—Ethene-propene or ethene-propene-diene copolymers
    • 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
    • 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
    • C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • 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
    • C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C08J2453/02—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/14—Applications used for foams
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/10—Peculiar tacticity

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

The invention discloses a preparation method of a foamed polypropylene pre-mixed material. The foamed polypropylene pre-mixed material is prepared from a polypropylene composition in a manner of reaction extrusion, wherein the polypropylene composition includes, by mass, 1-15 parts of polypropylene or a polypropylene co-polymer which is subjected to pre-electron-irradiation treatment with pre-irradiation dosage being 5-100 kGy, and 85-99 parts of polypropylene which is not subjected to irradiation treatment. The components are uniformly mixed and then are subjected to melting extrusion granulation in a double-screw extruder at screw rod rotation speed of 100-250/min at 170-260 DEG C to prepare the foamed polypropylene pre-mixed material. In the invention, a simple irradiation technology is employed with combination of a common extrusion method, thereby preparing the high-melt-strength polypropylene raw material.

Description

A kind of expanded polypropylene Preblend and preparation method thereof
Technical field
The invention belongs to field of polymer composite material, what be specifically related to is expanded polypropylene Preblend.
Background technology
Polypropylene (PP) porous plastics is a kind of type material of early 1970s exploitation, it is except having the known feature of general foaming product, also have good thermostability, stress crack resistance performance and higher tensile strength and shock strength, and there is good returnability, be conducive to environmental protection.These all features make PP porous plastics have significant superiority in every field such as automobile, packaging, daily necessities and structured materials.At present, external a few countries is as the U.S., Germany and the suitability for industrialized production having achieved PP porous plastics such as Italian.China just started the research of PP porous plastics aspect in recent years, and technology is still immature so far, and suitability for industrialized production is also in the starting stage.
In PP foaming research, ubiquitous problem is PP is crystalline polymer, and degree of crystallinity is higher, and after temperature arrives crystalline melt temperature, its melt viscosity declines rapidly, makes the gas produced in foaming process be difficult to maintain.Therefore the melt strength how improving PP is the problem that in its foaming, must solve.In order to solve the foaming problems of PP, the melt strength of PP must be improved.Mainly contain following 3 kinds of methods at present, namely adopt high fondant-strength PP (HMSPP), partial cross-linked, the PP blending and modifying of PP.Containing branched structure in HMSPP molecule, extensional viscosity is apparently higher than common PP, and melt strength improves, and effectively can stop gas loss, reduces abscess and merges, improve the cubical expansivity of PP porous plastics.PP is partial cross-linked is exactly connect to a three-dimensional space net structure by side chain between macromolecular chain, and PP is after being suitably cross-linked, and melt strength can be significantly increased.Crosslinked method has radiation crosslinking and chemically crosslinked two kinds.But due to PP molecular structure, easily degrade while crosslinked, cross-linking process is more much more difficult than other polyolefine.PP blending and modifying refers to PP and other polymer blending modification, can obtain good foam performance, and this technology receives enough attention, and development is very fast, is the focus of current research.
With PP cross-linked phase ratio, PP and other resin alloy do not need to add harmful chemical cross-linking agent, and obtained foamed products returnability is good, is conducive to environmental protection.2002, A.C.Chang etc. have carried out large quantifier elimination from structure and mechanical property aspect to the mixture of common PP and HMSPP respectively, find that HMSPP's adds the modulus in tension and melt strength that improve material, meanwhile, the transverse and longitudinal section intensity of material have also been obtained raising (AC Chang, L Tau, A Hiltner, E Baer.Structure of blown film from blends of polyethylene and high melt strength polypropylene.Polymer, 2002,43 (18): 4923 – 4933).2004, North China petro-chemical corporation of CNPC Liu Zhen dragon is waited and adopts conventional extruder, and with blending, the common PP of the HSMPP of massfraction 10%-15% is raw material, adds chemical foaming agent, PP low ratio expansion sheet produced by nucleator (Liu Zhenlong, Meng Bin, Zhang Liye, Zu Guangxin, Jia Xiufeng, the development of Polypropylene High Density Foamed Sheet, plastics industry, 2004,3:58-60).2002, C.P.Park adopted that syndiotactic PP and LDPE is blended carries out foam shaping by extrusion, obtained softness, the good froth product of dimensional stability.Research shows, along with the increase of LDPE content, percentage of open area reduces.Visible, after both are blended, PP melt strength improves, and abscess merges minimizing (C.P.Park.Foams preparedfrom blends of syndiotactic polypropylenes and thermoplastic polymers.US6417240B1).2007, T.Koch etc. are also studied PP/PE blend, discovery melt strength is improved, and obtain good microtexture (T Koch, D Machl.Evaluation of scratch resistance in multiphase PP blends.Polymer Testing, 2007,26(7): 927 – 936).The mid-90 in 20th century, the high-impact polystyrene (HIPS) that Wang Chicheng etc. utilizes second-order transition temperature low is blended with PP matrix, obtain PP intermingling material (the C Wang being applicable to injection foaming, KCox, GA Campbell.Microcellular foaming of polypropylene containing low glass transition rubberparticles in an injection molding process.Journal of Vinyl and Additive Technology, 1996,2 (2): 167 – 169)." pre-irradiation polypropylene and with 1, the research of 2-polyhutadiene co-mixing system " main purpose be by pre-irradiation, the consistency between PP and polyhutadiene is improved, and improve the mechanical property of PP, particularly impact property, (Zhang Chengwu, the research of pre-irradiation polypropylene and same 1, a 2-polyhutadiene co-mixing system, Harbin Institute of Technology, 2009)
Summary of the invention
Invention provides a kind of preparation method of expanded polypropylene Preblend, the method is easy to operate, environment friendly and pollution-free.
The present invention is by polypropylene and a kind of polypropylene of pre-irradiation or the preparation method of polypropylene copolymer blending reaction EXTRUSION FOAMED PP Preblend.
Technical scheme of the present invention is as follows:
A kind of expanded polypropylene Preblend, described composition is mass parts, comprises following component:
Polypropylene: 85-99 part;
Polypropylene after pre-electron irradiation process or polypropylene copolymer: 1-15 part, pre-irradiation dosage 5-100kGy.
A preparation method for expanded polypropylene Preblend, its step is as follows:
Polypropylene: 85-99 mass parts;
Polypropylene after pre-electron irradiation process or polypropylene copolymer: 1-15 mass parts, pre-irradiation dosage 5-100kGy.
In the twin screw extruder of screw speed 100-250 rev/min, temperature 170-260 DEG C, melt extrude granulation after described component mixes and namely obtain expanded polypropylene Preblend.
Described polypropylene is melt flow rate (MFR) scope: 0.1-60g/10min (GB/T3682-2000), density: 0.920-0.980g/cm3, ethylene content 0-15%(mass fraction), the polypropylene of degree of isotacticity 90-99.9%.
Polypropylene after described pre-electron irradiation process or polypropylene copolymer comprise polypropylene, ethene-the third segmented copolymer, styrene ethylene-propylene-styrol copolymer, the one in polypropylene elastomer.
Irradiation technique is namely in irradiation process, and PP is after high-energy ray irradiation, and be easy to form living radical in tertiary carbon position, branching or crosslinking reaction occur, and this kind of reaction can introduce long branched chain structure in linear PP molecular chain.
Irradiation technique of the present invention is also by introducing long branched chain structure in linear PP molecular chain.Long branched chain structure can make polymkeric substance possess significantly " strain hardening " feature, namely under constant stretch strain rate, and the increase in time of the tensile viscosity of melt and the characteristic sharply risen; Long-chain branch can improve melt strength and the tensile viscosity of polymkeric substance.
The shortcoming of common expanded polypropylene Preblend is that resin can lose some performance when blending, such as mechanical property etc., also need to consider consistency between each phase and the therefore problem of the degradation produced simultaneously, present method due to blended two kinds of materials be all polypropylene, both consistencies are good, when not reducing mechanical property, also improve melt strength, and it is easy to operate, environment friendly and pollution-free.
The present invention and " research of pre-irradiation polypropylene and same 1, a 2-polyhutadiene co-mixing system " have significant difference.The main purpose of the latter by pre-irradiation, the consistency between PP and polyhutadiene is improved, and improve the mechanical property of PP, particularly impact property, and after pre-irradiation, the raising of the melt strength of PP is stated without detailed, the present invention then lays particular emphasis on pre-irradiation to after PP process, can obtain the PP Preblend that can be used for foaming through simple blend method.
Beneficial effect:
The invention provides a kind of easy to operate, the environment friendly and pollution-free polypropylene by polypropylene and a kind of pre-irradiation or polypropylene copolymer blended, the preparation method of reactive extrursion expanded polypropylene Preblend.
The invention reside in and adopt simple irradiation technique, then in conjunction with common extrusion method, high melt strength, propylene raw material can be realized.
Embodiment
Describe the present invention below in conjunction with specific embodiment.Protection scope of the present invention is not limited with embodiment, but is limited by claim.
Embodiment 1 ~ 6 is preparations of expanded polypropylene Preblend.
Embodiment 1
A preparation for expanded polypropylene Preblend, is obtained by the polypropene composition reactive extrursion of following component:
Ethylene-Propylene Block Copolymer 1 part, pre-irradiation dosage 100kGy; Polypropylene 99 parts.
Raw material is mixed in high-speed mixer according to proportion of composing, then by length-to-diameter ratio L/D=40, the twin screw extruder of diameter 35mm, screw speed 100 revs/min, melt extrude granulation under the highest 170 DEG C of conditions of temperature of reaction, obtain high bath strength acrylic resin.
Properties of sample and melt strength the results are shown in Table 1.
Embodiment 2
A preparation for expanded polypropylene Preblend, is obtained by the polypropene composition reactive extrursion of following component:
Ethylene-Propylene Block Copolymer 15 parts, pre-irradiation dosage 100kGy; Polypropylene 85 parts.
Raw material is mixed in high-speed mixer according to proportion of composing, then by length-to-diameter ratio L/D=40, the twin screw extruder of diameter 35mm, screw speed 100 revs/min, melt extrude granulation under the highest 190 DEG C of conditions of temperature of reaction, obtain high bath strength acrylic resin.
Properties of sample and melt strength the results are shown in Table 1.
Embodiment 3
A preparation for expanded polypropylene Preblend, is obtained by the polypropene composition reactive extrursion of following component:
Styrene ethylene-propylene-styrol copolymer 3 parts, pre-irradiation dosage 100kGy; Polypropylene 97 parts.
Raw material is mixed in high-speed mixer according to proportion of composing, then by length-to-diameter ratio L/D=40, the twin screw extruder of diameter 35mm, screw speed 100 revs/min, melt extrude granulation under the highest 170 DEG C of conditions of temperature of reaction, obtain high bath strength acrylic resin.
Properties of sample and melt strength the results are shown in Table 1.
Embodiment 4
A preparation for expanded polypropylene Preblend, is obtained by the polypropene composition reactive extrursion of following component:
Ethylene-propylene copolymer 10 parts, pre-irradiation dosage 25kGy; Polypropylene 90 parts.
Raw material is mixed in high-speed mixer according to proportion of composing, then by length-to-diameter ratio L/D=40, the twin screw extruder of diameter 35mm, screw speed 100 revs/min, melt extrude granulation under the highest 190 DEG C of conditions of temperature of reaction, obtain high bath strength acrylic resin.
Properties of sample and melt strength the results are shown in Table 1.
Embodiment 5
A preparation for expanded polypropylene Preblend, is obtained by the polypropene composition reactive extrursion of following component:
Polypropylene elastomer 5 parts, pre-irradiation dosage 25kGy; Polypropylene 95 parts.
Raw material is mixed in high-speed mixer according to proportion of composing, then by length-to-diameter ratio L/D=40, the twin screw extruder of diameter 35mm, screw speed 150 revs/min, melt extrude granulation under the highest 210 DEG C of conditions of temperature of reaction, obtain high bath strength acrylic resin.
Properties of sample and melt strength the results are shown in Table 1.
Embodiment 6
A preparation for expanded polypropylene Preblend, is obtained by the polypropene composition reactive extrursion of following component:
Polypropylene elastomer 10 parts, pre-irradiation dosage 5kGy; Polypropylene 90 parts.
Raw material is mixed in high-speed mixer according to proportion of composing, then by length-to-diameter ratio L/D=40, the twin screw extruder of diameter 35mm, screw speed 200 revs/min, melt extrude granulation under the highest 230 DEG C of conditions of temperature of reaction, obtain high bath strength acrylic resin.
The melt strength result of table 1 embodiment 1-6 gained expanded polypropylene
the component each performance of content on expanded polypropylene Preblend in the blend increasing irradiation and raising pre-irradiation has impact, particularly increases significantly to the melt strength of Preblend.The melt strength of common acrylic plastering is lower than 4cN, and through with irradiation after polypropylene carry out blended, the melt strength values of the expanded polypropylene Preblend obtained increases significantly, and is a kind of expanded polypropylene Preblend that can obtain better foam structure when foaming.

Claims (4)

1. an expanded polypropylene Preblend, is characterized in that, described composition comprises following component: the polypropylene after pre-electron irradiation process or polypropylene copolymer 1-15 mass parts, pre-irradiation dosage 5-100kGy; Without the polypropylene 85-99 mass parts of pre-irradiation process.
2. expanded polypropylene Preblend according to claim 1, is characterized in that, described polypropylene or polypropylene copolymer comprise polypropylene, ethene-the third segmented copolymer, styrene ethylene-propylene-styrol copolymer, the one in polypropylene elastomer.
3. expanded polypropylene Preblend according to claim 1, is characterized in that, described composition comprises following component: the polypropylene after pre-electron irradiation process or polypropylene copolymer 5-15 mass parts, pre-irradiation dosage 20-80kGy; Without the polypropylene 85-95 mass parts of pre-irradiation process.
4. a preparation method for the expanded polypropylene Preblend according to claims 1 to 3 any one, comprises the following steps:
1) adopt high frequency high voltage electron accelerator, the irradiation in room temperature, air ambient to polypropylene or polypropylene copolymer, irradiation dose controls at 5-100kGy.
2) polypropylene after pre-irradiation process or polypropylene copolymer 1-15 mass parts mix with the polypropylene 85-99 mass parts without pre-irradiation process, control at 100-250 rev/min at screw speed, temperature of reaction controls in the twin screw extruder of 170-260 DEG C, melt extrude granulation and get final product.
CN201410149379.2A 2014-04-14 2014-04-14 Foamed polypropylene pre-mixed material and preparation method thereof Pending CN104974419A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107118374A (en) * 2017-06-26 2017-09-01 广州华大生物科技有限公司 A kind of method that use irradiation crosslinking technological prepares PP foam material
CN112280184A (en) * 2020-11-10 2021-01-29 中嘉卫华（固安）新材料科技有限公司 Electron irradiation crosslinking foaming polypropylene heat preservation belt and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1104223A (en) * 1993-07-15 1995-06-28 黑蒙特股份有限公司 Compositions of irradiated and non-irradiated olefin polymer materials with reduced gloss
CN102030910A (en) * 2009-09-25 2011-04-27 中国石油化工股份有限公司 Method for preparing long chain branched polyethylene
CN103665534A (en) * 2012-09-18 2014-03-26 中国石油化工股份有限公司 High melt strength polypropylene (PP) prepared by pre-irradiation technology and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1104223A (en) * 1993-07-15 1995-06-28 黑蒙特股份有限公司 Compositions of irradiated and non-irradiated olefin polymer materials with reduced gloss
CN102030910A (en) * 2009-09-25 2011-04-27 中国石油化工股份有限公司 Method for preparing long chain branched polyethylene
CN103665534A (en) * 2012-09-18 2014-03-26 中国石油化工股份有限公司 High melt strength polypropylene (PP) prepared by pre-irradiation technology and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107118374A (en) * 2017-06-26 2017-09-01 广州华大生物科技有限公司 A kind of method that use irradiation crosslinking technological prepares PP foam material
CN107118374B (en) * 2017-06-26 2018-04-06 广州华大生物科技有限公司 A kind of method that PP foam material is prepared using irradiation crosslinking technological
CN112280184A (en) * 2020-11-10 2021-01-29 中嘉卫华（固安）新材料科技有限公司 Electron irradiation crosslinking foaming polypropylene heat preservation belt and preparation method thereof

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