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Functionalized polypropylene for flexible packages, preparation method thereof and functionalized polypropylene used for preparing flexible packages by the method

A polypropylene, flexible packaging technology, applied in the directions of packaging, wrapping paper, transportation and packaging to achieve the effect of ensuring uniformity, preventing degradation and long irradiation time

Inactive Publication Date: 2010-03-24
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the domestic printing and packaging field, the preparation and application research of high polarity PP has not been reported yet.

Method used

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  • Functionalized polypropylene for flexible packages, preparation method thereof and functionalized polypropylene used for preparing flexible packages by the method
  • Functionalized polypropylene for flexible packages, preparation method thereof and functionalized polypropylene used for preparing flexible packages by the method
  • Functionalized polypropylene for flexible packages, preparation method thereof and functionalized polypropylene used for preparing flexible packages by the method

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preparation example Construction

[0055] In another specific embodiment of the present invention, a method for preparing functionalized polypropylene for flexible packaging is provided, comprising:

[0056] Step a: irradiating the polypropylene powder under nitrogen protection, the radiation source used is a cobalt source, the radiation dose is 20-60 kGy, and the dose rate is 2-0.5 kGy / h;

[0057] Step b: placing the polypropylene powder irradiated in step a for 6 to 48 hours;

[0058] as well as

[0059] Step c: Carry out melt grafting modification of the irradiated polypropylene powder and the non-irradiated polypropylene powder after being placed in step b with graft monomers of polar comonomers, wherein optional Adding antioxidants and / or lubricants,

[0060] Wherein, the irradiated polypropylene powder is 30-70 parts by weight, the non-irradiated polypropylene powder is 30-70 parts by weight, and the polar comonomer is 0.4-15 parts by weight.

[0061] In a preferred embodiment, the polar comonomer for ...

Embodiment 1

[0069] Preparation of Example 1 Functionalized Polypropylene Sample

[0070] Step 1: Put the polypropylene (PP) powder (Tianjin Petrochemical Company No. 2 Petrochemical Plant, brand TC-1) in a sealed plastic barrel, and use high-purity nitrogen to purify it for 1 hour at a flow rate of 100 L / min. Remove the oxygen in the material, and then store it tightly.

[0071] Step 2: The above-mentioned deoxidized PP powder is irradiated with gamma rays at a dose rate of 1.0kGy / hour under nitrogen protection, the radiation source used is a cobalt source, and the (total) radiation dose is 40kGy, wherein (total) Radiation dose = dose rate × radiation time.

[0072] Step 3: After placing the irradiated PP powder for 24 hours, under the protection of nitrogen, mix it with other antioxidants, lubricants, polar monomers (glycidyl methacrylate, hereinafter in accordance with the ratio in Table 1) GMA), co-monomer (styrene) blended for 3 to 10 minutes.

[0073] Table 1 Ratio of raw material...

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Abstract

The invention provides functionalized polypropylene (PP) for flexible packages and a preparation method thereof. The functionalized PP for flexible packages comprises the following components: (a) 30to 70 weight parts of irradiated PP powder; (b) 30 to 70 weight parts of non-irradiated PP powder; and (c) 0.4 to 15 weight parts of polar co-monomer formed by subjecting the irradiated PP powder in component (a) and the non-irradiated PP powder in component (b) to graft copolymerization, and optionally comprising (d) antioxidant and / or lubricant, wherein, the PP powder in component (a) is irradiated in the protective presence of nitrogen with the irradiation source thereof being a cobalt source, the irradiation dose thereof being 20kGy to 60kGy, and the dose rate thereof being 2 to 0.5 kGf / h.The invention intends to prepare PP with higher polarity and improve the print and compound properties of PP films by grafting the polar monomer of glycidyl methacrylate (GMA) and styrene on PP powder on the basis of the pre-irradiation method.

Description

technical field [0001] The invention belongs to the application of pre-radiation treatment and melting grafting technology in polymer modification, and specifically relates to a functionalized polypropylene for soft packaging, a preparation method thereof, and a functionalized polypropylene for flexible packaging prepared by the method. Background technique [0002] Polypropylene is one of the most promising thermoplastic polymer materials in the world today, and it is widely used in industries such as automobiles, home appliances, and packaging. Before 2000, my country needed to import a large amount of polypropylene, and the self-sufficiency rate was only about 60%. By 2006, domestic polypropylene consumption had reached 9.05 million tons, with an average annual growth rate of 14.1%. At present, my country has become the world's largest polypropylene consumer countries. [0003] As a flexible packaging material, the amount of polypropylene film is second only to polyethyle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F220/32C08F212/08C08J3/28C08L23/12C08L51/06C08K5/134C08K5/526C08K5/098B65D65/40B65D65/00B65D30/02
Inventor 许文才李东立曹国荣刘婧刘全校罗世永王茹魏华
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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