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Polyolefine core tube and method for preparing same

A polyolefin, core tube technology, applied in the direction of pipes, rigid pipes, mechanical equipment, etc., can solve the problems of decreased rigidity and strength, complex production process, low production efficiency, etc., to improve processability and mechanical properties, and broad market prospects , the effect of high production efficiency

Inactive Publication Date: 2009-01-07
苏州工业园区华通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Paper tube not only has low production efficiency, complex production process, but also high production cost and low cost performance; on the other hand, the paper tube itself will have defects such as moisture deformation, resulting in a sharp drop in rigidity and strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Raw material formula

[0025] The MFI (230°C, 2.16kg) of high molecular weight isotactic polypropylene is 0.1, and the isotacticity is 96%. The MFI of low molecular weight isotactic polypropylene is 3.5, and the isotacticity is 96%. The weight of high and low molecular weight polypropylene The ratio is 10:90; 8phr maleic anhydride grafted polypropylene, the weight grafting rate is 1%, MFI (230°C, 2.16kg) is 40g / 10min; 3phr enhancer N, N'-4,4'- Diphenylmethane bismaleimide; 23phr filler, wherein, 23phr is talc powder (1000 mesh); 3phr is filler short carbon fiber (fiber diameter 15 microns, fiber length 0.5 mm); silicone coupling agent is aminosilane Coupling agent, its dosage accounts for 15% by weight of filler, catalyst dibutyltin oxide accounts for 10% by weight of organosilicon coupling agent; phr; the amount of antioxidant 168 added is 1phr; a small amount of pigment.

[0026] Core tube preparation

[0027] 1. Filling and reinforcement system mixing:

[0028] T...

Embodiment 2

[0037] The MFI of high molecular weight isotactic polypropylene is 0.5, and isotacticity is 96%, and the MFI of low molecular weight isotactic polypropylene is 3.0, and isotactic degree is 96%, and high, low molecular weight polypropylene weight ratio is 15: 85; Ma The weight grafting ratio of toric anhydride grafted polypropylene is 1%, the MFI (230°C, 2.16kg) is 30g / 10min, and the addition amount is 10phr; Laimide 5phr; filler glass fiber (fiber diameter 5 micron) dosage is 18phr; organosilicon coupling agent is epoxy silane coupling agent, its dosage accounts for 10% of filler weight, catalyst dibutyltin dilaurate occupies organic 13% of the weight of the silicon coupling agent; the flow processing aid is fluoropolymer 1phr; the alpha nucleating agent is dibenzyl sorbitol or its derivatives, and the addition is 0.5phr; the antioxidant is antioxidant 1010 and The composition of antioxidant 1076, the dosage is 1phr; a small amount of pigment.

[0038] The preparation process...

Embodiment 3

[0040]The MFI of high molecular weight isotactic polypropylene is 0.5, and isotacticity is 96%, and the MFI of low molecular weight isotactic polypropylene is 3.0, and isotactic degree is 96%, and the weight ratio of high and low molecular weight polypropylene is 30:70; Ma The weight grafting ratio of toric anhydride grafted polypropylene is 1%, the MFI (230°C, 2.16kg) is 15g / 10min, and the addition amount is 12phr; the reinforcing agent N, N'- m-phenylene bismaleimide 4phr Filler dosage 20phr, wherein glass fiber (fiber diameter 5 microns) consumption is 15phr, short carbon fiber (fiber diameter 15 microns, fiber length 0.5 millimeter) 5phr; Silicone coupling agent is acryloxysilane coupling agent, and its consumption Accounting for 20% of the weight of the filler, the catalyst stannous octoate accounts for 10% of the weight of the silicone coupling agent; the flow processing aid fluoropolymer 1.5phr; the alpha nucleating agent is metal phosphate or its derivatives, the dosage...

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Abstract

The invention discloses a polyolefin core pipe and a preparation method thereof. The core pipe is obtained by mixing two kinds of high isotacticity of propylene homopolymers according to the weight proportion of 1 to 45 : 99 to 55 and adding maleic anhydride grafted polypropylene and flow processing aids for mixing evenly and through two-steps extrusion, cooling, extension, molding and cutting. The invention adopts the two kinds of high isotacticity of propylene resin with different molecular weights and the flow processing aids to promote the polymer macromolecule chain nucleation and the chain migration and diffusive capacity, speeds up polypropylene crystallization process and improves the processability and the mechanical property of polyolefin; the maleic anhydride grafted polypropylene and a filling reinforcing system intensify the physical and chemical action between fillers and polypropylene resin and between polypropylene resin to strengthen the hardness, rigidity and durability of polypropylene tubular products. The prepared core pipe with 75mm to 360mm of inside diameter and 7mm to 30mm of wall thickness can replace various paper core pipes, thereby having a wide popularization and application prospect.

Description

technical field [0001] The invention relates to a polyolefin pipe material and a preparation method thereof, in particular to a polyolefin core pipe used for wrapping paper or textiles and a preparation method thereof, and belongs to the technical field of polymer materials. Background technique [0002] In recent years, catalysts and polymerization processes for polyolefin synthesis have developed rapidly. In terms of technology for preparing high-rigidity polyolefin pipes, the Chinese invention patent "high-strength polypropylene pipe" (CN1133840C) provides a high tensile elastic modulus. Polypropylene pipe with high notched impact strength, high ring stiffness and high resistance to impact loads. In terms of technical solutions, this pipe is composed of two components A and B, A is an isotactic polypropylene homopolymer of 80 to 98 parts by mass as the bonding matrix component, and its ten-piece regularity is greater than 95%. B is 2 to 20% by mass of propylene from 50 t...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K13/06C08K5/3415C08K9/06B29B7/00B29B9/06B29C69/02B29C47/00B29C55/22F16L9/12C08L51/06C08L83/04C08L27/12
Inventor 邹佳栋刘中华朱新生
Owner 苏州工业园区华通科技有限公司
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