CN1123595C - 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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- CN1123595C CN1123595C CN98117712A CN98117712A CN1123595C CN 1123595 C CN1123595 C CN 1123595C CN 98117712 A CN98117712 A CN 98117712A CN 98117712 A CN98117712 A CN 98117712A CN 1123595 C CN1123595 C CN 1123595C
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Abstract
The present invention relates to a polypropylene resin composition with high fluidity, which comprises the following components: 80 to 95% of polypropylene homopolymer modified by chemical degradation, 1 to 10% of polymer grade copolymerized or homopolymerized polypropylene, 0.1 to 10% of high-density polyethylene (HDPE), 0.1 to 3% of low-density polyethylene (LDPE) or 0.1 to 0.3% of linear low-density polyethylene (LLDPE), 0.1 to 0.3% calcium stearate, 2, 6-Ditert-butyl-4-and 0.1 to 0.5% of methyl phenol, and the mixture is extruded and granulated under 180 to 230 DEG C by mixing. The resin composition has the characteristics of good processing performance and low spinning temperature, and can be used for manufacturing fibers, thin films and pipe materials.
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 is 0.2-10
The manufacturing of high-flowability polypropylene composition of the present invention is in the following order, step carries out:
(1) be that the above-mentioned chemical degradation modified polypropene of 80-95, content are that above-mentioned polymerization-grade copolymerization of 1-10 or homopolymerization are poly-with content
Propylene, content are that the HDPE of 0.1-5 and above-mentioned LDPE or content that content is 0.1-3 are the LLDPE of 0.1-3
With content is that 0.2 2,6 di tert butyl 4 methyl phenol, 0.1 calcium stearate mix;
(2) with said mixture in temperature be extrude on the twin screw extruder under 180-230 ℃, the Cast Strip, be a granulated into poly-
Propylene compositions.
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 1 180 ℃ of spinning
Embodiment 2
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
| Embodiment | 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 (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.
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. high-flowability polypropylene resin composition is characterized in that described composition comprises following component and content (weight percentage):
The polypropylene homopolymer 80-95 polymer grade copolymerization of component content chemical degradation modification or HOPP 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-methy phenol 0.1-0.5
2. according to the high-flowability polypropylene resin composition of claim 1, the melt flow index that it is characterized in that the homopolymer polypropylene of described chemical degradation modification is 50-200.
3. according to the high-flowability polypropylene resin composition of claim 1, the melt flow index that it is characterized in that described polymerization-grade copolymerization or homo-polypropylene is 0.2-10.
4. according to the high-flowability polypropylene resin composition of claim 1, the melt flow index that it is characterized in that described HDPE is 1-30.
5. according to the high-flowability polypropylene resin composition of claim 1, the melt flow index that it is characterized in that described LDPE or LLDPE is 0.2-10.
6. the preparation method of a kind of high-flowability polypropylene resin composition according to claim 1 is characterized in that in the following order, step carries out: (1) is that the above-mentioned chemical degradation modified polypropene of 80-95, content are the above-mentioned polymerization-grade copolymerization of 1-10 with content
Or homo-polypropylene, content be the HDPE of 0.1-10, above-mentioned LDPE that content is 0.1-3 or
Content is that the LLDPE of 0.1-3, calcium stearate and the content that content is 0.1-0.3 are 0.1-0.5's
2,6 di tert butyl 4 methyl phenol mixes; (2) said mixture is extruded on temperature is twin screw extruder under 180-230 ℃, the Cast Strip,
Be a granulated into polypropene composition.
7. the purposes of a kind of high-flowability polypropylene resin composition 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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| Publication Number | Publication Date |
|---|---|
| CN1246496A CN1246496A (en) | 2000-03-08 |
| CN1123595C true CN1123595C (en) | 2003-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN98117712A Expired - Fee Related CN1123595C (en) | 1998-08-31 | 1998-08-31 | High-flowability polypropylene resin composition and its preparing process and usage |
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Families Citing this family (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 |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054259A (en) * | 1991-03-12 | 1991-09-04 | 淄博市临淄区沥青制品厂 | Modified polypropene washing machine inner tub material and preparation |
| US5159018A (en) * | 1986-10-31 | 1992-10-27 | Sumitomo Chemical Co., Ltd. | Thermoplastic resin composition |
| CN1068603A (en) * | 1991-07-13 | 1993-02-03 | 中国科学院化学研究所 | The manufacture method of thin dawn and superfine denier polypropylene fibers |
| CN1151410A (en) * | 1995-11-24 | 1997-06-11 | 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
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5159018A (en) * | 1986-10-31 | 1992-10-27 | Sumitomo Chemical Co., Ltd. | Thermoplastic resin composition |
| CN1054259A (en) * | 1991-03-12 | 1991-09-04 | 淄博市临淄区沥青制品厂 | Modified polypropene washing machine inner tub material and preparation |
| CN1068603A (en) * | 1991-07-13 | 1993-02-03 | 中国科学院化学研究所 | The manufacture method of thin dawn and superfine denier polypropylene fibers |
| CN1151410A (en) * | 1995-11-24 | 1997-06-11 | 中国科学院化学研究所 | Fine denier and super-fine denier polypropylene alloy fibre and its prodn. method |
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| CN1246496A (en) | 2000-03-08 |
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