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Polypropylene resin catalytic modification technology for spunbond nonwoven fabric

A technology of polypropylene resin and spunbonded nonwoven fabric, which is applied in the field of catalytic modification of polypropylene resin for spunbonded nonwoven fabric, can solve the problems affecting tensile breaking strength and elongation at break, and achieve enhanced comprehensive performance , good mechanical properties and high use value

Inactive Publication Date: 2017-06-06
MAANSHAN CITY XIN CHENG NANO NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing processes for improving the melt flow rate of polypropylene resin, most of them increase the flow rate while reducing the rest of the physical properties, such as affecting the tensile strength at break, elongation at break, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A process for catalytic modification of polypropylene resin for spun-bonded non-woven fabrics, comprising the steps of:

[0017] (1) Deoxidize, desulfurize, and dehydrate the propylene raw material to be processed first, and then use it for later use;

[0018] (2) Put the propylene raw material treated in step (1) into the reaction tank, inject 20% hydrogen gas of the total volume of the propylene raw material into the reaction tank, add diisobutyl phthalate, 0.0003% of the total mass of the propylene raw material, 0.004% triethylaluminum, 0.001% diisopropyldimethoxysilane, 0.0002% dioctyl adipate, and finally add 2-methylpentane which is 1 times the total mass of propylene raw materials;

[0019] (3) Heat first to keep the temperature in the reaction tank at 67°C, keep the pressure in the reaction tank at 2.5MPa, stir at a speed of 1200 rpm for 10 minutes, then raise the temperature to 73°C, and pressurize to 3.2MPa , after stirring for 25 minutes at a speed of 1200 r...

Embodiment 2

[0023] A process for catalytic modification of polypropylene resin for spun-bonded non-woven fabrics, comprising the steps of:

[0024] (1) Deoxidize, desulfurize, and dehydrate the propylene raw material to be processed first, and then use it for later use;

[0025] (2) Put the propylene raw material treated in step (1) into a reaction tank, inject 20% hydrogen of the total volume of the propylene raw material into the reaction tank, add diisobutyl phthalate, 0.0005% of the total mass of the propylene raw material, 0.006% triethylaluminum, 0.0015% diisopropyldimethoxysilane, 0.0004% dioctyl adipate, and finally add 2-methylpentane twice the total mass of propylene raw materials;

[0026] (3) Heat first to keep the temperature in the reaction tank at 67°C, keep the pressure in the reaction tank at 2.5MPa, stir at a speed of 1300 rpm for 15 minutes, then raise the temperature to 73°C, and pressurize to 3.2MPa , after stirring at a speed of 1300 rpm for 30 minutes, finally rais...

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PUM

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Abstract

The invention discloses a polypropylene resin catalytic modification technology for spunbond nonwoven fabric, belonging to the field of processing technology of nonwoven fabric. The technology specifically comprises the following steps: mixing polypropylene resin with hydrogen, diisobutyl phthalate, triethyl aluminum, diisopropyl dimethoxy silane, dioctyl adipate and 2-methylpentane; performing heat preservation and pressure maintaining treatment in three stages; and finally, drying and granulating. In the invention, the prepared polypropylene resin solution has relatively a high flow rate of over 70g / min, and efficient production of spunbond nonwoven fabric is effectively guaranteed; and meanwhile, the prepared resin has a relatively good mechanical property and a relatively high use value.

Description

technical field [0001] The invention belongs to the technical field of processing non-woven fabrics, and in particular relates to a catalytic modification process of polypropylene resin for spun-bonded non-woven fabrics. Background technique [0002] Non-woven fabrics, also known as non-woven fabrics, are composed of directional or random fibers. They are a new generation of environmentally friendly materials. Low cost, recyclable and so on. Polypropylene pellets are mostly used as raw materials, which are produced by continuous one-step process of high-temperature melting, spinning, laying, and hot-pressing coiling. [0003] The spunbond method is one of the main production methods of non-woven fabrics, and the non-woven fabrics it produces also occupy the largest market share. It uses polyester fibers (polyester) and polypropylene fibers (polypropylene) as materials to make continuous long 1. The short fibers are arranged in a net structure during the spinning process, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/06C08F4/58
Inventor 程晓琳
Owner MAANSHAN CITY XIN CHENG NANO NEW MATERIAL TECH CO LTD