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Polypropylene resin composite, its production method and application

A technology of polypropylene resin and composition, applied in the direction of single-component polypropylene artificial filament, etc., can solve the problems of poor melt fluidity and processability, high molecular weight, large energy consumption, etc., and achieve melt fluidity and good processability

Inactive Publication Date: 2004-07-28
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the molecular weight is too high, the fluidity and processing performance of the melt will deteriorate, and the spinning temperature needs to be raised above 280°C, which not only consumes a lot of energy, but also makes it difficult to spin stably.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 100 grams of chemically degraded modified polypropylene with a melt flow index of 5.0 g / 10min, 12 grams of homopolypropylene with a melt flow index of 2 g / 10min, and 9 grams of melt flow index of 15 g / 10min by weight fraction High-density polyethylene, 4 grams of low-density polyethylene with a melt flow index of 10 g / 10 min, and 0.1 gram of 2,6-di-tert-butyl-4-methylphenol are pelletized at a screw extrusion temperature of 230 ° C to obtain poly Propylene composition. The composition was melt spun at a spinning temperature of 250° C. to obtain coiled filaments. The coiled yarn is drawn twice at 20°C and 130°C, with a total draw ratio of 4.7 to obtain finished yarn. The specific data results are shown in Table 1.

Embodiment 2

[0025] According to the weight fraction, 100 grams of chemically degraded modified polypropylene with a melt flow index of 8 g / 10min, 2 grams of homopolypropylene with a melt flow index of 2 g / 10min, and 6 grams of high melt flow index of 15 g / 10min Density polyethylene, 3 grams of low-density polyethylene with a melt flow index of 10 g / 10 min, and 0.2 grams of 2,6-di-tert-butyl-4-methylphenol are pelletized at a screw extrusion temperature of 220 ° C to obtain polypropylene combination. The composition was melt-spun at a spinning temperature of 245° C. to obtain coiled filaments. The coiled yarn is drawn twice at 20°C and 130°C with a total draw ratio of 4.4 to obtain finished yarn. The specific data results are shown in Table 1.

Embodiment 3

[0027] 100 grams of chemically degraded modified polypropylene with a melt flow index of 12 g / 10min, 11 grams of homopolypropylene with a melt flow index of 2 g / 10min, and 1 gram of high melt flow index of 15 g / 10min by weight fraction Density polyethylene, 1 gram of low-density polyethylene with a melt flow index of 10 g / 10 min, and 0.1 gram of 2,6-di-tert-butyl-4-methylphenol are pelletized at a screw extrusion temperature of 230 ° C to obtain polypropylene combination. The composition was melt spun at a spinning temperature of 240° C. to obtain coiled filaments. The wound yarn is drawn twice at 20°C and 135°C, with a total draw ratio of 5.0 to obtain finished yarn. The specific data results are shown in Table 1.

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Abstract

The present invention discloses a polypropylene resin composite and its production method. It adopts the polypropylene with higher melt flow index (5-50g / 10 min), and adds small quantity of polypropylene with low melt flow index and small quantity of polyethylenes with different specifications. By weight portion, 100 portions of chemical degradation modified polypropylene, 1-14 portions of polymerization-grade copolymeric or homopolymeric polypropylene, 0.1-9 portions of high-density polyethylene, 0.1-4 portions of low-density polyethylene and 0.1-0.5 portion of 2,6-di-t-butyl-4-methylphenol are uniformly mixed in stirring machine, then the mixture is extruded by twin screw extruder machine at 180-230 deg.C and granulated so as to obtain the polypropylene composite which can be used for producing high-strength polypropylene fibre.

Description

technical field [0001] The invention relates to a polypropylene resin composition and a manufacturing method thereof. The resin composition is suitable for the manufacture of high-strength polypropylene fibers, films and the like. Background technique [0002] Polypropylene fiber (polypropylene fiber) has the characteristics of low density, acid and alkali resistance, organic solvent resistance, simple raw material production process and spinning process, short process route, low comprehensive cost and wide application, and has market competitive advantages. Polypropylene high-strength yarn is a promising category in the polypropylene family. It has a wide range of uses, such as ropes, industrial slings, various filter cloths, geotextiles, industrial sewing threads, medical sewing threads and special sewing threads for container bags, etc. [0003] At present, the polypropylene resins used in the production of high-strength polypropylene yarn at home and abroad are basical...

Claims

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Application Information

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IPC IPC(8): C08L23/26D01F6/06
Inventor 徐端夫周素蓉张秀芹吴燕婕董侠赵莹胡先波王笃金
Owner INST OF CHEM CHINESE ACAD OF SCI
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