CN104629177A - Low-temperature fracture prevented plastics and preparation method thereof - Google Patents
Low-temperature fracture prevented plastics and preparation method thereof Download PDFInfo
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- CN104629177A CN104629177A CN201510039711.4A CN201510039711A CN104629177A CN 104629177 A CN104629177 A CN 104629177A CN 201510039711 A CN201510039711 A CN 201510039711A CN 104629177 A CN104629177 A CN 104629177A
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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
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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
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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
- 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
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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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- 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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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Abstract
The invention discloses low-temperature fracture prevented plastics and a preparation method thereof. The low-temperature fracture prevented plastics contain the ingredients, namely high-polymer polypropylene, low-density polyethylene and polyethylene-octylene copolymer elastomer. The preparation method comprises the following preparation steps: (a) firstly, adding PP-BA160E and LDPE-1922T into a high-speed plastic particle stirrer, and mixing at a low speed; (b) increasing the revolving speed of the particle stirrer, then, adding POE-LC175, which is preheated to the temperature of 90 DEG C, into the high-speed plastic particle stirrer, further mixing at a high speed, gradually increasing the temperature of the stirrer to 100-140 DEG C, discharging and cooling; (c) adding the mixed materials into a screw extruder for extrusion molding; (d) carrying out water cooling on strip-shaped materials, and guiding the cooled strip-shaped materials into a granulating machine for granulating. According to the low-temperature fracture prevented plastics and the preparation method thereof, through combining the high-polymer polypropylene, the low-density polyethylene and the polyethylene-octylene copolymer elastomer, the adverse problems that the plastics are brittle and are prone to fracture under the condition of low temperature can be effectively solved.
Description
Technical field
The present invention relates to a kind of plastics and preparation method thereof, particularly relate to anti-fracture plastics of a kind of low temperature and preparation method thereof.
Background technology
Plastics take monomer as raw material, by the macromolecular compound (macromolecules) of addition polymerization or polycondensation polymerized, be commonly called as plastics (plastics) or resin (resin), can freely change composition and body styles, be made up of additives such as synthetic resins and filler, softening agent, stablizer, lubricant, colorants.Plastics are applied widely, but under cryogenic, common plastics product can produce the easily feature such as crisp.Particularly for plastic seal, spination strip of paper used for sealing locking bar part after bending, generally all there will be turn white, the problem such as fracture, particularly outstanding under cryogenic, have a strong impact on quality product.
Summary of the invention
Technical problem to be solved by this invention is to provide anti-fracture plastics of a kind of low temperature and preparation method thereof, effectively can to solve under cold condition easily crisp, the bad problem such as poor toughness, easy fracture, notch sensitive.
The present invention solves the problems of the technologies described above the technical scheme adopted to be to provide the anti-fracture plastics of a kind of low temperature, comprises containing following component: superpolymer polypropylene, Low Density Polyethylene and polyethylene octene elastomer.
The anti-fracture plastics of above-mentioned low temperature, wherein, described superpolymer polypropylene is PP-BA160E, and described Low Density Polyethylene is LDPE-1922T, and described polyethylene octene elastomer is POE-LC175.
The anti-fracture plastics of above-mentioned low temperature, wherein, the weight percent of each component is as follows: PP-BA160E 75%-85%; LDPE-1922T 7%-20%; POE-LC1755%-8%.
The present invention solves the problems of the technologies described above the preparation method that the technical scheme adopted is to provide the anti-fracture plastics of a kind of above-mentioned low temperature, comprise the steps: a) first PP-BA160E and LDPE-1922T to be joined in high-speed plastic particle stirrer by weight percentage, mix 2 minutes at the low rotational speed; B) rotating speed of high-speed plastic particle stirrer is promoted, by weight percentage the POE-LC175 being preheating to 90 DEG C is joined high-speed plastic particle stirrer again, continue mixing 10 minutes at high speed, and stirrer temperature is progressively promoted to 100 DEG C ~ 140 DEG C, discharging is also cooled to envrionment temperature; C) mixture being cooled to envrionment temperature is joined extrusion moulding in screw extrusion press, controlling average drop temperature is 180 DEG C ~ 200 DEG C, and extrusion moulding obtains strip-shaped materials; D) water cooling is carried out to strip-shaped materials, then directly strip-shaped materials is guided to pelletizing in dicing machine and obtain particulate state finished product.
The preparation method of the anti-fracture plastics of above-mentioned low temperature, wherein, described step a) in rotating speed be 50rpm/min ~ 1000rpm/min, described step b) in rotating speed be 1500rpm/min.
The preparation method of the anti-fracture plastics of above-mentioned low temperature, wherein, the compression ratio of the screw rod of described screw extrusion press controls to be 3 ﹕ 1, and screw speed is 80 revs/min.
The present invention contrasts prior art following beneficial effect: anti-fracture plastics of low temperature provided by the invention and preparation method thereof, by to superpolymer polypropylene, Low Density Polyethylene and polyethylene octene elastomer combine, thus the easy bad problem such as crisp, easy fracture under effectively can solving cold condition.
Accompanying drawing explanation
Fig. 1 is material mixture ratio tensile test graphic representation of the present invention;
Fig. 2 is low temperature of the present invention anti-fracture plastics preparation flow schematic diagram; .
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Anti-fracture plastics of low temperature provided by the invention and preparation method thereof comprise following component: superpolymer polypropylene, Low Density Polyethylene and polyethylene octene elastomer.
The anti-fracture plastics of low temperature provided by the invention, Low Density Polyethylene (LDPE) is the various moulding processs of applicable thermoplastic molding processing, and molding processibility is good.Polyethylene octene elastomer (POE) is the thermoplastic elastomer adopting the ethene of metallocene catalyst and octene to realize in-situ polymerization, be characterized in: the flexible chain coiled structure of (1) octene and the ethylene chain of crystallization, as physical crosslinking point, make the toughness of its existing excellence have again good processibility.(2) there is no unsaturated double-bond in POE molecular structure, there is excellent ageing-resistant performance.(3) POE narrow molecular weight distribution, has good mobility, good with compatible polyolefin.(4) good mobility can improve the dispersion effect of filler, also can improve the weld mark strength of goods simultaneously.There is low-temperature flexibility difference in polypropylene, easily become fragile, resistance to impact shock is low, not wear-resisting, the shortcoming such as easily aging and notch sensitivity is large, therefore, in order to improve the deficiency in Properties of Polypropylene, the present invention adopts and adds appropriate LLDPE, and octene copolymer LLDPE resin has good intensity, anti tear characteristic and processing characteristics, the characteristics such as resisting environmental stress and cracking, and moldings can the easily demoulding at relatively high temperatures, facilitates follow-up suitability for industrialized production to process.In order to improve under the toughness of plastic prod and cold condition the easily feature such as crisp, the present invention adopts has the POE material that excellent toughness has again good processing characteristics, the singularity of its molecular structure imparts mechanical property, the rheological property of its excellence, fine with polypropylene compatible, low-temperature flexibility is good, performance and price is higher, has preferably mobility, the advantages such as stronger shearing sensibility and melt strength, high temperature can be realized extrude, improve output.
Therefore, the anti-fracture plastics of low temperature provided by the invention, by superpolymer polypropylene, Low Density Polyethylene and polyethylene octene elastomer combine, thus the easy bad problem such as crisp, easy fracture under effectively can solving cold condition.Described superpolymer polypropylene is preferably the PP-BA160E of Borealis, and described Low Density Polyethylene is preferably LDPE-1922T, and described polyethylene octene elastomer is preferably POE-LC175.The weight percent of each component is preferably as follows:
PP-BA160E 75％-85％；
LDPE-1922T 7％-20％；
POE-LC175 5％-8％。
The anti-fracture plastics of low temperature provided by the invention, each component different ingredients is as shown in the table, and wherein pulling force >=20 are qualified, each component different ingredients on the impact of pulling force as shown in Figure 1:
| Embodiment | Raw material | Raw material weight proportioning | Tensile test |
| 1 | PP、LDPE、POE | 85:3:12 | 8.9 (defective) |
| 2 | PP、LDPE、POE | 85:4:11 | 10.0 (defective) |
| 3 | PP、LDPE、POE | 85:5:10 | 11.8 (defective) |
| 4 | PP、LDPE、POE | 85:6:9 | 15.7 (defective) |
| 5 | PP、LDPE、POE | 85:7:8 | 21.1 (qualified) |
| 6 | PP、LDPE、POE | 85:8:7 | 21.9 (qualified) |
| 7 | PP、LDPE、POE | 85:9:6 | 25.2 (qualified) |
| 8 | PP、LDPE、POE | 85:10:5 | 26.1 (qualified) |
| 9 | PP、LDPE、POE | 80:12:8 | 26.2 (qualified) |
| 10 | PP、LDPE、POE | 80:13:7 | 28.3 (qualified) |
| 11 | PP、LDPE、POE | 80:14:6 | 30.1 (the bests) |
| 12 | PP、LDPE、POE | 80:15:5 | 29.5 (qualified) |
| 13 | PP、LDPE、POE | 75:17:8 | 25.9 (qualified) |
| 14 | PP、LDPE、POE | 75:18:7 | 23.6 (qualified) |
| 15 | PP、LDPE、POE | 75:19:6 | 22.4 (qualified) |
| 16 | PP、LDPE、POE | 75:20:5 | 20.5 (qualified) |
| 17 | PP、LDPE、POE | 75:21:4 | 15.2 (defective) |
| 18 | PP、LDPE、POE | 75:22:3 | 12.5 (defective) |
| 19 | PP、LDPE、POE | 75:23:2 | 12.0 (defective) |
As seen from Figure 1, according to the plastics of preferred percent configuration of the present invention, when LDPE percentage composition is less than 7%, or when POE percentage composition is less than 5%, pulling force obviously reduces, and all the other pulling tension requirements can arrive the effect of anticipation, after adopting new formula plastics, can effectively prevent bending part from turning white, the unfavorable conditions such as fracture occur.
Fig. 2 is low temperature of the present invention anti-fracture plastics preparation flow schematic diagram.
Refer to Fig. 2, the present invention also provides the preparation method of the anti-fracture plastics of a kind of above-mentioned low temperature, comprises the steps:
Step S1: according to the raw materials weighing of formula, join in high-speed kneading machine by polyethylene (LDPE-1922T) and the mixture of polypropylene (PP-BA160E), first slow block (50rpm/min ~ 1000rpm/min) mixes 2 minutes;
Step S2: the rotating speed promoting high-speed plastic particle stirrer, under 1500rpm/min rotating speed, the ethylene/octene (POE-LC175) being preheating to 90 DEG C is joined in mixing machine by charge cavity, keep 1500rpm/min rotating speed and continue mixing 10min, whether even by viewing window observation dispersion of materials; When the temperature of mixture is increased to 100 DEG C to 140 DEG C, discharging is also cooled to envrionment temperature;
Step S3: the mixture being cooled to envrionment temperature is joined extrusion moulding in screw extrusion press, wherein the compression ratio of screw rod controls at 3 ﹕ 1, screw speed must be stablized, rotating speed controls at 80 revs/min, can not change along with the change of screw rod load, such uniform quality of resulting product that could keep is consistent, thus obtains qualified strip-shaped materials, makes drop temperature control at 180 DEG C ~ 200 DEG C in discharging process;
Step S4: carry out air-cooled to strip-shaped materials, then directly guides to pelletizing in dicing machine by strip-shaped materials and obtains the low temperature resistant clinker particles finished product of environment-friendly type.Product processing of the present invention is good, and thermostability is high, has excellent resistance to low temperature.
Although the present invention discloses as above with preferred embodiment; so itself and be not used to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little amendment and perfect, therefore protection scope of the present invention is when being as the criterion of defining with claims.
Claims (6)
1. the anti-fracture plastics of low temperature, is characterized in that, comprise following component: superpolymer polypropylene, Low Density Polyethylene and polyethylene octene elastomer.
2. the anti-fracture plastics of low temperature as claimed in claim 1, it is characterized in that, described superpolymer polypropylene is PP-BA160E, and described Low Density Polyethylene is LDPE-1922T, and described polyethylene octene elastomer is POE-LC175.
3. the anti-fracture plastics of low temperature as claimed in claim 2, it is characterized in that, the weight percent of each component is as follows:
PP-BA160E 75％-85％；
LDPE-1922T 7％-20％；
POE-LC175 5％-8％。
4. a preparation method for the anti-fracture plastics of low temperature as claimed in claim 3, is characterized in that, comprise the steps:
A) first PP-BA160E and LDPE-1922T is joined by weight percentage in high-speed plastic particle stirrer, mix 2 minutes at the low rotational speed;
B) rotating speed of high-speed plastic particle stirrer is promoted, by weight percentage the POE-LC175 being preheating to 90 DEG C is joined high-speed plastic particle stirrer again, continue mixing 10 minutes at high speed, and stirrer temperature is progressively promoted to 100 DEG C ~ 140 DEG C, discharging is also cooled to envrionment temperature;
C) mixture being cooled to envrionment temperature is joined extrusion moulding in screw extrusion press, controlling average drop temperature is 180 DEG C ~ 200 DEG C, and extrusion moulding obtains strip-shaped materials;
D) water cooling is carried out to strip-shaped materials, then directly strip-shaped materials is guided to pelletizing in dicing machine and obtain particulate state finished product.
5. the preparation method of the anti-fracture plastics of low temperature as claimed in claim 4, is characterized in that, described step a) in rotating speed be 50rpm/min ~ 1000rpm/min, described step b) in rotating speed be 1500rpm/min.
6. the preparation method of the anti-fracture plastics of low temperature as claimed in claim 4, is characterized in that, the compression ratio of the screw rod of described screw extrusion press controls to be 3 ﹕ 1, and screw speed is 80 revs/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510039711.4A CN104629177B (en) | 2015-01-26 | 2015-01-26 | Low-temperature fracture prevented plastics and preparation method thereof |
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| CN201510039711.4A CN104629177B (en) | 2015-01-26 | 2015-01-26 | Low-temperature fracture prevented plastics and preparation method thereof |
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| CN104629177A true CN104629177A (en) | 2015-05-20 |
| CN104629177B CN104629177B (en) | 2017-02-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106003939A (en) * | 2016-07-05 | 2016-10-12 | 丹东鑫马高科技塑料包装有限公司 | Composite plastic sheet and making method thereof |
| CN109456522A (en) * | 2018-09-26 | 2019-03-12 | 上海敏孑图文设计事务所（有限合伙） | A kind of semirigid plastic row button and its preparation process |
| CN109705446A (en) * | 2018-12-27 | 2019-05-03 | 佛山佛塑科技集团股份有限公司 | A kind of modified polyolefin mother material and its preparation method and application |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1919915A (en) * | 2005-08-26 | 2007-02-28 | 海尔集团公司 | Modified polypropylene material for refrigerator and manufacture method thereof |
| CN103387734A (en) * | 2012-05-09 | 2013-11-13 | 合肥杰事杰新材料股份有限公司 | Low temperature resistant polypropylene composite material, and preparation method and application thereof |
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2015
- 2015-01-26 CN CN201510039711.4A patent/CN104629177B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1919915A (en) * | 2005-08-26 | 2007-02-28 | 海尔集团公司 | Modified polypropylene material for refrigerator and manufacture method thereof |
| CN103387734A (en) * | 2012-05-09 | 2013-11-13 | 合肥杰事杰新材料股份有限公司 | Low temperature resistant polypropylene composite material, and preparation method and application thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106003939A (en) * | 2016-07-05 | 2016-10-12 | 丹东鑫马高科技塑料包装有限公司 | Composite plastic sheet and making method thereof |
| CN109456522A (en) * | 2018-09-26 | 2019-03-12 | 上海敏孑图文设计事务所（有限合伙） | A kind of semirigid plastic row button and its preparation process |
| CN109705446A (en) * | 2018-12-27 | 2019-05-03 | 佛山佛塑科技集团股份有限公司 | A kind of modified polyolefin mother material and its preparation method and application |
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| CN104629177B (en) | 2017-02-22 |
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Address after: No. 1336 Jinge Road, Jinshan District, Shanghai, June 2015 Patentee after: Shanghai Xinfan Industry Co.,Ltd. Address before: No. 1336 Jinge Road, Jinshan District, Shanghai, June 2015 Patentee before: SHANGHAI XINFAN INDUSTRIAL Corp. |
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