CN106519441A - Process for efficiently modifying waste polypropylene in green manner - Google Patents

Process for efficiently modifying waste polypropylene in green manner Download PDF

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Publication number
CN106519441A
CN106519441A CN201610989316.7A CN201610989316A CN106519441A CN 106519441 A CN106519441 A CN 106519441A CN 201610989316 A CN201610989316 A CN 201610989316A CN 106519441 A CN106519441 A CN 106519441A
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CN
China
Prior art keywords
waste
polypropylene
screw extruder
modified technique
mass percent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610989316.7A
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Chinese (zh)
Inventor
陈从华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jieshou City Huateng Plastic Industry Co Ltd
Original Assignee
Jieshou City Huateng Plastic Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jieshou City Huateng Plastic Industry Co Ltd filed Critical Jieshou City Huateng Plastic Industry Co Ltd
Priority to CN201610989316.7A priority Critical patent/CN106519441A/en
Publication of CN106519441A publication Critical patent/CN106519441A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • 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
    • C08L2207/06—Properties of polyethylene
    • C08L2207/066—LDPE (radical process)
    • 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
    • C08L2207/20—Recycled plastic

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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)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

The invention discloses a process for efficiently modifying waste polypropylene in a green manner. The process includes steps of granulating the waste polypropylene; drying the polypropylene; adding magnesium hydroxide, pentaerythritol ester and high-pressure polyethylene into the polypropylene to obtain first mixtures; adding dispersing agents into the first mixtures to obtain second mixtures; extruding the second mixtures by the aid of double screws; adding magnesium oxide whiskers into the second mixtures and the like. The process has the advantages that the waste polypropylene can be processed and modified under simple process conditions, accordingly, the mechanical properties and the flame-retardant properties of the polypropylene can be improved, the process cycle can be shortened, secondary pollution can be prevented, the cost can be saved, and environments can be protected.

Description

Waste and old polypropylene green high-efficient modified technique
Technical field
The present invention relates to technics of reclaim of plastic waste and recycle utilization technology field, and in particular to a kind of waste and old polypropylene green is high Effect modified technique.
Background technology
At present, the annual production of world's plastic has broken through 200,000,000 tons, and also with 30% speed increase.But with Developing rapidly for World Plastics Industry, substantial amounts of waste or used plastics are also generated.These waste or used plastics are also with plastic Increase and constantly increase, but plastics recovery process utilization rate it is low, due to their intrinsic high molecular chemical characters, biological degradability Difference, decomposition rate are slow, can cause environmental pollution, health is adversely affected in being scattered in nature for a long time.
Polypropylene (Polypropylene, abridge PP) plastics have that density is little, specific strength (intensity density corresponding thereto Ratio) high, anticorrosive, rub resistance, good insulating, easy processing, energy consumption be low and noise is little etc. it is many a little, be the row such as auto industry The ideal application material of industry.As the continuous enhancing of people's environmental consciousness, the raising of people's level of consumption and people offset Take the raising of product quality requirements, the requirement to PP performances is gradually improved.Especially to PP strength characters, bending property, anti-impact The requirement for hitting the performances such as performance, fire resistance is more harsh.In recent years, researcher has done broad aspect to lifting PP performances Research work, by PP add rubber or elastomeric material, glass fibre, Masterbatch, graft acrylic acid etc., expect to lead to The performance for adding that this little filler lifts PP is crossed, but effect is not obvious.
The content of the invention
The present invention is to solve the above problems, there is provided a kind of step is simple, and effectively waste and old polypropylene can be modified adds Work technique, has high intensity and high tenacity through modified polypropylene, and fire resistance is also greatly improved.
The technical problem to be solved is realized using following technical scheme：
A kind of waste and old polypropylene green high-efficient modified technique, which comprises the following steps：
(1) waste and old polypropylene is carried out broken and PP GRANULES is made by comminutor, by PP GRANULES in setting At a temperature of be dried two hours；
(2) magnesium hydroxide, pentaerythritol ester, polyethylene from high pressure process are mixed with PP GRANULES by the addition of setting It is even；
(3) dispersant of setting mass percent is added in the compound obtained by step (2) and being stirred mixes which Close uniform；
(4) temperature and the screw speed of double screw extruder is set, the compound eventually formed in the step (3) is added Mixed in double screw extruder and continuously extruded；
(5) after discharging opening starts discharging, by the magnesia crystal whisker of setting mass percent by the double screw extruder During side position material mouth is added to double screw extruder and mixes, extrude；
(6) material after mixing extrusion in step (5) is carried out into cutting pelletize, and particle is dried at a temperature of setting Modified polypropylene particles can be obtained within two hours.
In step (2), polypropylene, magnesium hydroxide, pentaerythritol ester, polyethylene from high pressure process are made up of following weight portion：
367.6～450.5 parts of polypropylene, 265.3～325.0 parts of magnesium hydroxide, 3.7～4.5 parts of pentaerythritol ester, high pressure 36.8～45 parts of polyethylene.
In step (3), the dispersant is stearic acid, and its mass percent is 1%～3%.
In step (5), the mass percent of the magnesia crystal whisker is 1%～5%.
In step (1) and (6), baking temperature is 60 DEG C～100 DEG C.
In step (4), the extrusion temperature of the double screw extruder is 175 DEG C～190 DEG C, and adjusting screw rod rotating speed is 120r/min～180r/min.
Beneficial effects of the present invention are：
(1) present invention is under using simple process conditions, more obvious to polyacrylic reinforced effects, with preferable Application prospect.
(2) magnesium hydroxide, pentaerythritol ester, polyethylene from high pressure process are compounded by novelty of the present invention according to certain ratio, Its fire resistance is also enhanced so as to not only increase polyacrylic mechanical property.
(3) magnesia crystal whisker is added by novelty of the present invention from side spout, not only reduces mixing energy consumption and enhancing Effect is fairly obvious.
(4) stearic acid modified dose for using of the invention need not be modified in advance, shorten process cycle and avoid Secondary pollution, cost-effective and environmental protection.
(5) present invention is moderate to equipment requirements, and product quality is stable, and performance indications are excellent.
Specific embodiment：
In order that technological means, creation characteristic, reached purpose and effect that the present invention is realized are easy to understand, tie below Embodiment is closed, the present invention is expanded on further.
A kind of waste and old polypropylene green high-efficient modified technique, which comprises the following steps：
(1) waste and old polypropylene is carried out broken and PP GRANULES is made by comminutor, by PP GRANULES in setting At a temperature of be dried two hours；
(2) magnesium hydroxide, pentaerythritol ester, polyethylene from high pressure process are mixed with PP GRANULES by the addition of setting It is even；
(3) dispersant of setting mass percent is added in the compound obtained by step (2) and being stirred mixes which Close uniform；
(4) temperature and the screw speed of double screw extruder is set, the compound eventually formed in the step (3) is added Mixed in double screw extruder and continuously extruded；
(5) after discharging opening starts discharging, by the magnesia crystal whisker of setting mass percent by the double screw extruder During side position material mouth is added to double screw extruder and mixes, extrude；
(6) material after mixing extrusion in step (5) is carried out into cutting pelletize, and particle is dried at a temperature of setting Modified polypropylene particles can be obtained within two hours.
In step (2), polypropylene, magnesium hydroxide, pentaerythritol ester, polyethylene from high pressure process are made up of following weight portion：
367.6～450.5 parts of polypropylene, 265.3～325.0 parts of magnesium hydroxide, 3.7～4.5 parts of pentaerythritol ester, high pressure 36.8～45 parts of polyethylene.
In step (3), the dispersant is stearic acid, and its mass percent is 1%～3%.
In step (5), the mass percent of the magnesia crystal whisker is 1%～5%.
In step (1) and (6), baking temperature is 60 DEG C～100 DEG C.
In step (4), the extrusion temperature of the double screw extruder is 175 DEG C～190 DEG C, and adjusting screw rod rotating speed is 120r/min～180r/min.
Formula according to determining before experiment is weighed, and Ju Ti Pei Fang is shown in Table one.According to the process conditions system of experimental design Standby standard batten.
Hardness test：
Using thickness it is uniform, surface is smooth, smooth, bubble-free, have no mechanical damage and impurity standard batten, thickness is little In 4mm, sample size should ensure that the center of each measurement point and sample Edge Distance not less than 10mm, between each measurement point away from From not less than 10mm.Its hardness number is determined using XHR-150 plastic durometers, concrete data see the table below：
Average hardness value 50 or so, compared with no treated polypropylene plaques (hardness number 43～45), firmly Degree improves about 10～15%.
Shock-testing：
Standard batten is hanged by XJC-250D, letter combination shock machine determines its impact strength, concrete data see below Table：
Average impact can 7.4 or so, compared with no treated polypropylene plaques (impact energy 6.20～ 6.46), impact energy improves about 15～20%.
Ultimate principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry It should be appreciated that the present invention is not restricted to the described embodiments, described in above-described embodiment and description is only the present invention to personnel Preference, be not intended to limit the present invention, without departing from the spirit and scope of the present invention, the present invention also have it is various Changes and improvements, these changes and improvements are both fallen within scope of the claimed invention.The claimed scope of the invention is by institute Attached claims and its equivalent thereof.

Claims (6)

1. a kind of waste and old polypropylene green high-efficient modified technique, which comprises the following steps：
(1) waste and old polypropylene is carried out broken and PP GRANULES is made by comminutor, by PP GRANULES in design temperature Lower drying two hours；
(2) magnesium hydroxide, pentaerythritol ester, polyethylene from high pressure process are mixed homogeneously with PP GRANULES by the addition of setting；
(3) dispersant of setting mass percent is added in the compound obtained by step (2) and being stirred makes which mix It is even；
(4) temperature and the screw speed of double screw extruder is set, the compound for eventually forming is added to double in the step (3) Mixed in screw extruder and continuously extruded；
(5) after discharging opening starts discharging, the side position of the magnesia crystal whisker by the double screw extruder of mass percent will be set During material mouth is added to double screw extruder and mixes, extrude；
(6) material after mixing extrusion in step (5) is carried out into cutting pelletize, and it is little that particle is dried two at a temperature of setting When can obtain modified polypropylene particles.
2. waste and old polypropylene green high-efficient modified technique as claimed in claim 1, it is characterised in that：In step (2), gather Propylene, magnesium hydroxide, pentaerythritol ester, polyethylene from high pressure process are made up of following weight portion：
367.6～450.5 parts of polypropylene, 265.3～325.0 parts of magnesium hydroxide, 3.7～4.5 parts of pentaerythritol ester, the poly- second of high pressure 36.8～45 parts of alkene.
3. waste and old polypropylene green high-efficient modified technique as claimed in claim 1, it is characterised in that：In step (3) Dispersant is stearic acid, and its mass percent is 1%～3%.
4. waste and old polypropylene green high-efficient modified technique as claimed in claim 1, it is characterised in that：In step (5) The mass percent of magnesia crystal whisker is 1%～5%.
5. waste and old polypropylene green high-efficient modified technique as claimed in claim 1, it is characterised in that：Step (1) and (6) In, baking temperature is 60 DEG C～100 DEG C.
6. waste and old polypropylene green high-efficient modified technique as claimed in claim 1, it is characterised in that：In step (4), should The extrusion temperature of double screw extruder is 175 DEG C～190 DEG C, and adjusting screw rod rotating speed is 120r/min～180r/min.
CN201610989316.7A 2016-11-10 2016-11-10 Process for efficiently modifying waste polypropylene in green manner Pending CN106519441A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610989316.7A CN106519441A (en) 2016-11-10 2016-11-10 Process for efficiently modifying waste polypropylene in green manner

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Application Number Priority Date Filing Date Title
CN201610989316.7A CN106519441A (en) 2016-11-10 2016-11-10 Process for efficiently modifying waste polypropylene in green manner

Publications (1)

Publication Number Publication Date
CN106519441A true CN106519441A (en) 2017-03-22

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Country Status (1)

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CN (1) CN106519441A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1763129A (en) * 2004-10-20 2006-04-26 大连圣迈化学有限公司 Thermoplastic halogen-free few-smoke flame-proof cable sheath material and machining process
CN102408631A (en) * 2011-11-09 2012-04-11 东莞上海大学纳米技术研究院 High-strength flaming retarding polypropylene modified material and preparation method thereof
CN103613852A (en) * 2013-10-31 2014-03-05 浙江俊尔新材料股份有限公司 Polypropylene composite material prepared from waste battery jars, preparation method and applications thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1763129A (en) * 2004-10-20 2006-04-26 大连圣迈化学有限公司 Thermoplastic halogen-free few-smoke flame-proof cable sheath material and machining process
CN102408631A (en) * 2011-11-09 2012-04-11 东莞上海大学纳米技术研究院 High-strength flaming retarding polypropylene modified material and preparation method thereof
CN103613852A (en) * 2013-10-31 2014-03-05 浙江俊尔新材料股份有限公司 Polypropylene composite material prepared from waste battery jars, preparation method and applications thereof

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Application publication date: 20170322

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