Polypropylene material for stretched film and preparation method of polypropylene material

A technology of polypropylene material and polypropylene resin, which is applied in the field of polypropylene material and its preparation, can solve the problem of high price and achieve the effects of high stiffness and transparency, stable quality and high flexural modulus

Active Publication Date: 2019-03-15
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The price of imported BOPP special materials is higher

Method used

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  • Polypropylene material for stretched film and preparation method of polypropylene material
  • Polypropylene material for stretched film and preparation method of polypropylene material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Using the Sphripol polymerization process, propylene is pre-polymerized under the joint action of the main catalyst, co-catalyst and external electron donor, and then enters a loop pipe. The temperature of the reactor is controlled at 70°C, the hydrogen concentration is 350ppm, and the ethylene / propylene is 4kg / t, and the preparation obtains polypropylene powder;

[0031] (2) The polypropylene powder obtained in step (1) enters the two-loop pipe together with propylene and hydrogen, the temperature of the reactor is controlled at 70° C., and the hydrogen concentration is 1050 ppm to prepare the polypropylene resin powder;

[0032] (3) Mix the polypropylene resin powder obtained in step (2) with the auxiliary agent according to the following proportions: polypropylene resin powder: 99.6 parts, antioxidant 1010: 0.1 part, auxiliary antioxidant U626: 0.05 part, Halogen absorbent: 0.05 parts, α nucleating agent: 0.2 parts;

[0033] (4) Extrude the mixture obtained in ...

Embodiment 2

[0036] (1) Using the Sphripol polymerization process, propylene is pre-polymerized under the joint action of the main catalyst, co-catalyst and external electron donor, and then enters a loop pipe. The temperature of the reactor is controlled at 70 °C, the hydrogen concentration is 400ppm, and the ethylene / propylene is 4.5kg / t, and the preparation obtains polypropylene powder;

[0037] (2) The polypropylene powder obtained in step (1) enters the second ring pipe together with propylene and hydrogen, the temperature of the reactor is controlled at 70° C., and the hydrogen concentration is 1000 ppm to prepare polypropylene resin powder;

[0038] (3) Mix the polypropylene resin powder obtained in step (2) with the auxiliary agent according to the following proportions: polypropylene resin powder: 99.55 parts, antioxidant 1010: 0.09 part, auxiliary antioxidant U626: 0.06 part, Halogen absorbent: 0.05 parts, α nucleating agent: 0.25 parts;

[0039] (4) Extrude the mixture obtaine...

Embodiment 3

[0042] (1) Using the Sphripol polymerization process, propylene is pre-polymerized under the joint action of the main catalyst, co-catalyst and external electron donor, and then enters a loop pipe. The temperature of the reactor is controlled at 70 °C, the hydrogen concentration is 450ppm, and the ethylene / propylene is 4.2kg / t, and the polypropylene powder is prepared;

[0043] (2) The polypropylene powder obtained in step (1) enters the two-loop pipe together with propylene and hydrogen, the temperature of the reactor is controlled at 70°C, and the hydrogen concentration is 950ppm to prepare the polypropylene resin powder;

[0044] (3) Mix the polypropylene resin powder obtained in step (2) with the auxiliary agent according to the following proportions: polypropylene resin powder: 99.58 parts, antioxidant 1010: 0.12 parts, auxiliary antioxidant U626: 0.06 parts, Halogen absorbent: 0.06 parts, α-nucleating agent: 0.18 parts;

[0045] (4) Extrude the mixture obtained in step...

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Abstract

The invention discloses a polypropylene material for a stretched film. The polypropylene material for the stretched film comprises the following components: 99.3-99.86 parts of polypropylene resin powder, 0.05-0.2 part of an antioxidant 1010, 0.03-0.1 part of an auxiliary antioxidant U626, 0.01-0.1 part of a halogen absorbent and 0.05-0.3 part of an alpha nucleating agent. The polypropylene material for the stretched film has higher stiffness and transparence than those of the conventional material and is applicable to production of a high-end stretched film.

Description

technical field [0001] The invention relates to the technical field of polymer material compositions, in particular to a polypropylene material used for stretching films and a preparation method thereof. Background technique [0002] Polypropylene stretched film (BOPP film) has high strength, good gas barrier properties, good printing performance and tear resistance, and is widely used in the packaging of food, candy, cigarettes, tea, juice, milk, textiles, etc. "The good name. The wide application, low pollution and protection of forest natural resources make polypropylene stretch film a more popular packaging material than paper and polyvinyl chloride (PVC); the simple and reliable manufacturing process and reasonable price make it It has become a more commonly used packaging material than biaxially oriented polyester (BOPET) film and biaxially oriented nylon (BOPA) film. [0003] In recent years, my country's BOPP film has developed rapidly and industry competition has ...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08K5/00C08K5/098C08K5/053C08J5/18
CPCC08J5/18C08J2323/16C08K5/00C08K5/053C08K5/098Y02P20/52
Inventor 蒋文军蔡伟倪春霞陈仕兵柯君豪刘国禹卢瑞真周小群
Owner CHINA PETROLEUM & CHEM CORP
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