CN1246496A - High-flowability polypropylene resin composition and its preparing process and usage - Google Patents
High-flowability polypropylene resin composition and its preparing process and usage Download PDFInfo
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Abstract
A high-flowability polypropylene resin composition is prepared from polypropylene homopolymer modified by chemical degradation (80-95%), copolymerized or homopolymerized polypropylene (1-10%), high-density polyethylene (HDPE) (0.1-10%), low-density polyethylene (LDPE) or linear low-density polyethylene (LLDPE) (0.1-3%), calcium stearate (0.1-0.3%) and 2,6-ditert-butyl-4-methylphenol (0.1-0.5) through mixing, extruding out at 180-230 deg.C and granulating. Its advantages are better processing performance and low spinning temp. It can be used to make fibre, film and pipes.
Description
The present invention relates to a kind of high-flowability polypropylene resin composition and manufacture method thereof.
Reasons such as molecular weight, molecular weight distribution and foreign matter content owing to the commodity acrylic resin, the flowability and the poor in processability of general acrylic resin, cause exceeding the spinning more than 100 ℃ of polypropylene fusing point, all be difficult to stably spin smoothly superior in quality finished fiber.Industrial with the higher resin spinning of melt flow index, but the intensity of fiber is little, and extension at break big (＞100%) is usually used in the non-woven field.With the control chemical degradation method common polymer grade polypropylene is carried out modification and handle the high-flowability polypropylene resin of making, though can change resin flow, processibility is still not ideal enough.Patent CN1068603A discloses a kind of with polymer grade polypropylene and the polyacrylic composition spinning of chemical degradation, the melt flow index of described resin is about 45, and is better mobile, though processibility has obvious improvement, but its spinning temperature is still higher, is 250-260 ℃.
The diameter of thin dawn, superfine denier polypropylene fibers is much thinner than the diameter of conventional polypropylene fibre, and the spinning difficulty is big, needs could successfully make the finished fiber of excellent property with special spinning special raw material, special spinning equipment and spinning technology parameter.Can find that from disclosed patent report various different spining technology routes have some common characteristic, all adopt the quite high acrylic resin of melt flow index as the spinning PP Pipe Compound.As the PP Pipe Compound spinning of melt flow index of some patent report up to 300-500; Some patent report is spun into fine denier polypropylene fibers with the resin of special requirement with quite high speed.But the intensity of these fibre products is low, extension at break is big, is not suitable for stable textiles of manufacturing dimension or high-intensity industry fiber.GB
(11)2258869
(13)B and Chinese patent application numbers 95119565.4 discloses a kind of composition and " a kind of alloying polypropylene resin composite and method for making and purposes " of polypropylene resin composite respectively, patent CN1068603A and Chinese patent application numbers 95119564.5 discloses " manufacture method of a kind of thin dawn and superfine denier polypropylene fibers " and " a kind of thin dawn and superfine denier polypropylene " alloy " fiber and method for making thereof " respectively, but the processing temperature with above-mentioned existing spining technology is 250-270 ℃, be higher than 100 ℃ of polypropylene fusing points, being higher than its fusing point with the spinning temperature of polyester or polymeric amide compares for about 30 ℃, obviously higher, cause the power consumption of polymer processing of polypropylene fibre bigger than normal.
A kind of high-flowability polypropylene resin composition of the present invention overcome in the past that Resin Flow was poor, processing temperature high and the course of processing such as consequent spinning in shortcoming such as resin degraded or product deterioration and provide a kind of can be in quite high polypropylene resin composite of lesser temps spinning, spinning speed and preparation method thereof.
The present invention seeks to develop applicable to the existing common melt spinning apparatus of China, resin workability excellent low temperature spinning polypropene composition.Basic design of the present invention and major technique are constructed as follows: at the shortcoming in existing polypropylene fibre (comprising thin dawn, the superfine Denier fibre) manufacturing technology, provide a kind of polypropylene resin composite of good processability.For flowability, tensility and the reduction spinning temperature that improves the resin combination melt, we have adopted the high-flowability polypropylene composition of melt flow index 50-200, simultaneously for the mechanical property that guarantees finished fiber and the quality of finished silk, we add the polyethylene of little polypropylene of a spot of melt flow index and different size in composition.Spinning temperature is reduced to below 250 ℃.Best spinning temperature is controlled at about the above 20-30 of polypropylene fusing point ℃ promptly 180-210 ℃.
High-flowability polypropylene speciality resin for spinning composition of the present invention comprises following composition and content (weight fraction):
(1): the homopolymer polypropylene of chemical degradation modification, its content are 80-95
(2): polymerization-grade copolymerization or homo-polypropylene PP, its content are 1-10
(3): HDPE, its content are 0.1-10
(4): LDPE, its content are 0.1-3 or a kind of LLDPE, and its content is 0.1-3
(5): calcium stearate 0.1-0.3
(6): 2,6 di tert butyl 4 methyl phenol 0.1-0.5
The melt flow index of above-mentioned chemical degradation modified polypropene is 50-200
The melt flow index of above-mentioned polymerization-grade copolymerization or homo-polypropylene is at 0.2-10
The melt flow index of above-mentioned HDPE is 1-30
The melt flow index of above-mentioned LDPE or LLDPE be 0.2-10 high-flowability polypropylene composition of the present invention manufacturing in the following order, step carries out:
(1) be that the above-mentioned chemical degradation modified polypropene of 80-95, content are that the above-mentioned polymerization-grade copolymerization of 1-10 or homo-polypropylene, content are that HDPE and the content of 0.1-5 is that the above-mentioned LDPE of 0.1-3 or LLDPE that content is 0.1-3 are that 0.2 2,6 di tert butyl 4 methyl phenol, 0.1 calcium stearate mix with content with content;
(2) be to extrude on the twin screw extruder under 180-230 ℃, the Cast Strip, be a granulated into polypropene composition in temperature with said mixture.
The purposes of high-flowability polypropylene resin composition of the present invention comprises thin dawn, superfine denier polypropylene fibers, polypropylene strong fibre, conventional polypropylene fibre and polypropylene film and tubing.
High-flowability polypropylene resin composition of the present invention has that processibility is good, spinning temperature is low, production efficiency is high and characteristics such as fibre property is good, and fibre property sees Table 1.
The present invention intends by following embodiment and Comparative Examples simple declaration characteristics of the present invention and advantage, but can not think that the present invention only only limits to the content of embodiment.Embodiment 1
With melt flow index be 95 parts of above-mentioned chemical degradation modified polypropenes of 50,2 parts of above-mentioned polymerization-grade copolymerization or homo-polypropylene, 2 parts of HDPE, 1 part above-mentioned LDPE, 0.2 part 2,6-di-tert-butyl-4-methy phenol, 0.1 part the polypropene composition of calcium stearate the results are shown in Table 1 embodiment 2 180 ℃ of spinning
With melt flow index be 95 parts of above-mentioned chemical degradation modified polypropenes of 50,2 parts of above-mentioned polymerization-grade copolymerization or homo-polypropylene, 2 parts of HDPE, 1 part above-mentioned LDPE, 0.2 part 2,6-di-tert-butyl-4-methy phenol, 0.1 part the polypropene composition of calcium stearate the results are shown in Table 1 210 ℃ of spinning.Embodiment 3
With melt flow index be 95 parts of above-mentioned chemical degradation modified polypropenes of 50,2 parts of above-mentioned polymerization-grade copolymerization or homo-polypropylene, 2 parts of HDPE, 1 part above-mentioned LDPE, 0.2 part 2,6-di-tert-butyl-4-methy phenol, 0.1 part the polypropene composition of calcium stearate the results are shown in Table 1 230 ℃ of spinning
Table 1 embodiment 1-3
Embodiment 4
| Embodiment | ??1 | ??2 | ??3 | |
| The drafting silk physicals | Fiber number (dtex) | ??1.32 | ??1.30 | ??1.24 |
| Intensity (cN/dtex) | ??5.59 | ??4.24 | ??4.54 | |
| Elongation (%) | ??52.0 | ??54.5 | ??49.6 | |
With consist of melt flow index be 92 parts of chemical degradation modified polypropenes of 60,5 parts of above-mentioned polymerization-grade copolymerization or homo-polypropylene, 2 parts of HDPE, 1 part above-mentioned LDPE, 0.2 part 2,6-di-tert-butyl-4-methy phenol, 0.1 part the polypropene composition of calcium stearate the results are shown in Table 2 180 ℃ of spinning.Embodiment 5
With melt flow index be 92 parts of chemical degradation modified polypropenes of 80,5 parts of above-mentioned polymerization-grade copolymerization or homo-polypropylene, 2 parts of HDPE, 1 part above-mentioned LDPE, 0.2 part 2,6-di-tert-butyl-4-methy phenol, 0.1 part the polypropene composition of calcium stearate the results are shown in Table 2 190 ℃ of spinning.Embodiment 6
With melt flow index be 92 parts of chemical degradation modified polypropenes of 100,5 parts of above-mentioned polymerization-grade copolymerization or homo-polypropylene, 2 parts of HDPE, 1 part above-mentioned LDPE, 0.2 part 2,6-di-tert-butyl-4-methy phenol, 0.1 part the polypropene composition of calcium stearate the results are shown in Table 2 190 ℃ of spinning.Embodiment 7
With melt flow index be 92 parts of chemical degradation modified polypropenes of 120,5 parts of above-mentioned polymerization-grade copolymerization or homo-polypropylene, 2 parts of HDPE, 1 part above-mentioned LDPE, 0.2 part 2,6-di-tert-butyl-4-methy phenol, 0.1 part the polypropene composition of calcium stearate the results are shown in Table 2 190 ℃ of spinning.
Table 2 embodiment 4-7
Embodiment 8
| Embodiment | ??4 | ??5 | ??6 | ??7 | |
| The drafting silk physicals | Fiber number (dtex) | ??0.73 | ??0.97 | ??0.88 | ??0.98 |
| Intensity (cN/dtex) | ??7.43 | ??5.36 | ??4.83 | ??4.80 | |
| Elongation (%) | ??31.4 | ??40.0 | ??70.1 | ??88.0 | |
With melt flow index be 95 parts of above-mentioned chemical degradation modified polypropenes of 60,3 parts of above-mentioned polymerization-grade copolymerization or homo-polypropylene, 2 parts of HDPE, 1 part above-mentioned LLDPE, 0.2 part 2,6-di-tert-butyl-4-methy phenol, 0.1 part the polypropene composition of calcium stearate the results are shown in Table 3 190 ℃ of spinning.Embodiment 9
With melt flow index be 95 parts of above-mentioned chemical degradation modified polypropenes of 100,3 parts of above-mentioned polymerization-grade copolymerization or homo-polypropylene, 2 parts of HDPE, 1 part above-mentioned LLDPE, 0.2 part 2,6-di-tert-butyl-4-methy phenol, 0.1 part the polypropene composition of calcium stearate the results are shown in Table 3 190 ℃ of spinning.Embodiment 10
With melt flow index be 93 parts of above-mentioned chemical degradation modified polypropenes of 60,2 parts of above-mentioned polymerization-grade copolymerization or homo-polypropylene, 2 parts of HDPE (MFI2-3), 1 part of HDPE (MFI6-7), 1 part above-mentioned LDPE, 0.2 part 2,6-di-tert-butyl-4-methy phenol, 0.1 part the polypropene composition of calcium stearate the results are shown in Table 3 190 ℃ of spinning.
Table 3 embodiment 8-12
Embodiment 11
| Implement | Example | 8 | ??9 | ??10 | ?11 | ??12 |
| The drafting silk physicals | Fiber number (dtex) | 1.03 | ??0.92 | ??0.96 | ?0.99 | ??1.0 |
| Intensity (cN/dtex) | 5.75 | ??5.39 | ??6.40 | ?6.34 | ??4.36 | |
| Elongation (%) | 48.6 | ??40.4 | ??42.2 | ?38.3 | ??52.1 |
With melt flow index be 93 parts of above-mentioned chemical degradation modified polypropenes of 80,2 parts of above-mentioned polymerization-grade copolymerization or homo-polypropylene, 2 parts of HDPE (MFI 2-3), 1 part of HDPE (MFI 6-7), 1 part above-mentioned LDPE, 0.2 part 2,6-di-tert-butyl-4-methy phenol, 0.1 part the polypropene composition of calcium stearate the results are shown in Table 3 190 ℃ of spinning.Embodiment 12
With melt flow index be 93 parts of above-mentioned chemical degradation modified polypropenes of 100,2 parts of above-mentioned polymerization-grade copolymerization or homo-polypropylene, 2 parts of HDPE (MFI2-3), 1 part of HDPE (MFI6-7), 1 part above-mentioned LDPE, 0.2 part 2,6-di-tert-butyl-4-methy phenol, 0.1 part the polypropene composition of calcium stearate the results are shown in Table 3 190 ℃ of spinning.
The contrast experiment of resin shows, melt flow index exists less than the composition of the little polymer grade polypropylene of 40 chemical degradation modified resin or itself and flow index that fluidity of molten is poor, the spinning pressure instability when the corresponding low-temp spinning, or the tension force of spun undrawn yarn is big, and wrapping wire moulding smoothly, drawing-off becomes qualified finished fiber smoothly.Have only melt temperature is brought up to higher spinning temperature, as about 260 ℃, spinning drawing-off more stably.
Claims (7)
1 one kinds of high-flowability polypropylene resin compositions is characterized in that described composition comprises following component and content (weight fraction):
Component concentration
The homopolymer polypropylene 80-95 of chemical degradation modification
Polymerization-grade copolymerization or homo-polypropylene PP 1-10
HDPE????????????????????????????????????0.1-10
LDPE or a kind of LLDPE 0.1-3
Calcium stearate 0.1-0.3
2,6 di tert butyl 4 methyl phenol 0.1-0.5
The homopolymer polypropylene of 2 a kind of chemical degradation modifications according to claim 1, the melt flow index that it is characterized in that the homopolymer polypropylene of described chemical degradation modification is 50-200;
3 a kind of polymerization-grade copolymerization according to claim 1 or homo-polypropylene PP, the melt flow index that it is characterized in that described polymerization-grade copolymerization or homo-polypropylene is at 0.2-10;
4 a kind of HDPE according to claim 1, the melt flow index that it is characterized in that described HDPE is 1-30;
5 a kind of LDPE according to claim 1 or a kind of LLDPE, the melt flow index that it is characterized in that described LDPE or LLDPE is 0.2-10;
The preparation method of 6 a kind of high-flowability polypropylene resin compositions according to claim 1 is characterized in that in the following order, step carries out:
1): with content is that the above-mentioned chemical degradation modified polypropene of 80-95, content are that the above-mentioned polymerization-grade copolymerization of 1-10 or homo-polypropylene, content are that LLDPE, content that the HDPE of 0.1-5, above-mentioned LDPE that content is 0.1-3 or content are 0.1-3 are that 0.2 2,6 di tert butyl 4 methyl phenol and 0.1 calcium stearate mix;
2): with said mixture is being to extrude on the twin screw extruder under 180-230 ℃, the Cast Strip, be a granulated into polypropene composition in temperature.
7 a kind of high-flowability polypropylene resin composition purposes according to claim 1 is characterized in that described composition is used to prepare thin dawn, superfine denier polypropylene fibers, polypropylene strong fibre, polypropylene conventional fibre, polypropylene screen and polypropylene pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98117712A CN1123595C (en) | 1998-08-31 | 1998-08-31 | High-flowability polypropylene resin composition and its preparing process and usage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98117712A CN1123595C (en) | 1998-08-31 | 1998-08-31 | High-flowability polypropylene resin composition and its preparing process and usage |
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| CN1246496A true CN1246496A (en) | 2000-03-08 |
| CN1123595C CN1123595C (en) | 2003-10-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481479B (en) * | 2009-02-09 | 2011-10-26 | 松下家电研究开发（杭州）有限公司 | Polypropylene modified material and production method thereof |
| CN103740185A (en) * | 2014-01-14 | 2014-04-23 | 南京金陵塑胶化工有限公司 | Novel polypropylene random copolymer (PP-R) coating material |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1325486C (en) * | 1986-10-31 | 1993-12-21 | Takayuki Okada | Thermoplastic resin composition |
| CN1018837B (en) * | 1991-03-12 | 1992-10-28 | 淄博齐新塑料厂 | Modified polypropylene used for making internal drum of washer and preparing process thereof |
| CN1027982C (en) * | 1991-07-13 | 1995-03-22 | 中国科学院化学研究所 | Preparing process of fine denier and ultra-fine denier polypropylene fibre P |
| CN1076032C (en) * | 1995-11-24 | 2001-12-12 | 中国科学院化学研究所 | Fine denier and super-fine denier polypropylene alloy fibre and its prodn. method |
-
1998
- 1998-08-31 CN CN98117712A patent/CN1123595C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481479B (en) * | 2009-02-09 | 2011-10-26 | 松下家电研究开发（杭州）有限公司 | Polypropylene modified material and production method thereof |
| CN103740185A (en) * | 2014-01-14 | 2014-04-23 | 南京金陵塑胶化工有限公司 | Novel polypropylene random copolymer (PP-R) coating material |
| CN103740185B (en) * | 2014-01-14 | 2016-05-11 | 南京金陵塑胶化工有限公司 | A kind of atactic copolymerized polypropene coating material |
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