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Polypropylene composition and polypropylene kinking packaging film

A polypropylene composition, polypropylene technology, applied in the directions of transportation and packaging, packaging, wrapping paper, etc., can solve the problems of high stiffness, stiffness and kink, achieve increased stiffness and stiffness, higher extrusion volume, The effect of improving mechanical properties

Active Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages that the existing polypropylene kink packaging film cannot have high stiffness, stiffness and kinkability, and provide a polypropylene twist packaging film that can have both high stiffness, stiffness and kinkability. Propylene composition and polypropylene twist wrap film

Method used

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  • Polypropylene composition and polypropylene kinking packaging film
  • Polypropylene composition and polypropylene kinking packaging film
  • Polypropylene composition and polypropylene kinking packaging film

Examples

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preparation example Construction

[0047] The present invention does not specifically limit the water content in the alcohol corresponding to the alkoxy group in the preparation process of the above-mentioned alkoxy magnesium compound. In order to make the obtained alkoxy magnesium compound have more excellent performance, moisture content is required. The less the content, the better. Generally, the water content in the alcohol corresponding to the alkoxy group needs to be controlled below 1000ppm, preferably below 200ppm.

[0048] According to the present invention, the inert atmosphere is known to those skilled in the art, preferably nitrogen atmosphere and / or argon atmosphere. In addition, the preparation of the magnesium alkoxide compound usually uses an inert solvent as a reaction medium. Wherein, the inert solvent can be C 6 -C 10 At least one of alkanes or aromatics, preferably at least one of hexane, heptane, octane, decane, benzene, toluene, xylene and their derivatives.

[0049] According to the p...

Embodiment 1

[0118] This example is used to illustrate the polypropylene composition and polypropylene twist packaging film provided by the present invention and the preparation method thereof.

[0119] (1) Preparation of polypropylene:

[0120] A. Preparation of titanium-containing solid catalyst component: After fully replacing the 16L pressure-resistant reactor with a stirrer with nitrogen, then add 10L ethanol, 300mL of 2-ethylhexanol, 11.2g iodine, 8g Magnesium chloride and 640g of magnesium powder were stirred and mixed evenly, and the system was heated to 75°C for reflux reaction while stirring, and the reaction was stopped until no hydrogen gas was discharged. The obtained reaction product was washed with 3L of ethanol, filtered, and dried to obtain dialkoxymagnesium with an average particle diameter D50 of 30.2 μm, a particle size distribution index SPAN of 0.81, and m of 0.015. Take 650g of the above dialkoxymagnesium, 3250mL of toluene, and 65mL of 2-isopropyl-2-isopentyl-1,3-d...

Embodiment 2

[0132] This example is used to illustrate the polypropylene composition and polypropylene twist packaging film provided by the present invention and the preparation method thereof.

[0133] (1) Preparation of polypropylene:

[0134] A, preparation of titanium-containing solid catalyst component: (same as Example 1);

[0135] B, test device: (same as embodiment 1);

[0136] C. Test conditions:

[0137] Step (1) pre-polymerization: the reaction pressure is 2.5MPa, the reaction temperature is 10°C, and the reaction time is 12 minutes; the feeding amount of titanium-containing solid catalyst component and triethylaluminum is 0.4g / hour and 0.058mol / hour respectively Hour, the propylene feed rate is 10 kilograms / hour, obtains the propylene prepolymer that prepolymerization multiple is 100 gram polymer / gram catalyst;

[0138] Step (2) Gas-phase polymerization: The reaction temperature is 91°C, the reaction pressure is 2.3 MPa, and the reaction time is 60 minutes. The propylene pre...

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Abstract

The invention provides a polypropylene composition and a polypropylene kinking packaging film prepared from the polypropylene composition. The polypropylene composition comprises polypropylene, a nucleating agent and petroleum resin; the molecular weight distribution index of the polypropylene is 2.5-5.5, the polymer tail index PIHT of molecular weight distribution width is greater than 1.9, and the melt mass-flow rate (MFR) at the temperature of 230 DEG C under the load of 2.16kg is 5-10g / 10min. The molecular weight distribution index of polypropylene contained in the polypropylene composition is narrow, the polymer tail index is greater, and the obtained polypropylene composition can obtain high tensile modulus and tensile strength by low amount use of the petroleum resin, and has good kinking properties.

Description

technical field [0001] The invention relates to a polypropylene composition and a polypropylene twist packaging film. Background technique [0002] Twisted packaging has a beautiful and novel style, and is easy to take out of the package. It is often used in the packaging of candy, chocolate and food. At present, most manufacturers in my country use polyvinyl chloride as twisted packaging materials, but polyvinyl chloride has some problems in recycling and environmental protection. It will produce toxic gases when burned, which will damage human health and cause environmental pollution. It has been used by many European countries. The country prohibits the packaging of candy and food. Polypropylene resin not only has advantages in environmental protection, but also has excellent mechanical properties, optical properties, light weight and high price, so it has been widely used in the field of film and packaging, and can be used to replace polyvinyl chloride in candy and food ...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L57/02C08F110/06C08F4/649C08F4/646B65D65/02B65D65/38
CPCB65D65/02B65D65/38C08F110/06C08L23/12C08L2203/16C08L2205/24C08L2207/10C08L2314/02C08L57/02C08F4/6494C08F4/646C08F4/6465C08F4/6546C08F4/651
Inventor 徐萌张师军高达利邹浩杨芝超王良诗吕芸徐凯邵静波
Owner CHINA PETROLEUM & CHEM CORP
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