Aluminum-plating-grade casting homo-polypropylene film material and preparation method thereof

A technology of homopolypropylene and membrane materials, applied in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of long-term stable supply, high prices, and large fluctuations, and avoid membrane rupture. And the effect of peeling off the aluminized layer, good rigidity, and increased stiffness

CN102952331AActive Publication Date: 2013-03-06CHINA PETROLEUM & CHEM CORP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2013-03-06

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Abstract

The invention discloses an aluminum-plating-grade casting homo-polypropylene film material and a preparation method thereof. The casting homo-polypropylene film material is made from the raw materials of homo-polypropylene resin, antioxidant and halogen absorbent, wherein the melt flow rate of the homo-polypropylene resin is 6-9 g / 10 min, and the isotacticity index of the resin is 96%-98%. The homo-polypropylene resin can be prepared by the following steps of: adding propylene, which is taken as a raw material, into a loop reactor, adding a catalyst, a promoter, an electron donor and an antistatic agent into the propylene, and uniformly stirring the materials to obtain the homo-polypropylene resin, wherein the reaction temperature in the loop reactor is controlled at 70+ / -1 DEG C, the reaction pressure in the loop reactor is controlled at 3.4-3.8 MPa, and the hydrogen concentration in the loop reactor is controlled at 900-1200 ppm. The polypropylene resin meets the requirements on processability and mechanical property of an aluminum-plated intermediate film layer. The invention further discloses a preparation method of the polypropylene resin.
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Description

technical field

[0001] The invention relates to an aluminized-grade cast homopolypropylene film material, in particular to an aluminized-grade cast homo-polypropylene film material. The invention also relates to a preparation method of the aluminized-grade cast homopolypropylene film material. Background technique

[0002] Cast polypropylene film (cast polypropylene; CPP) is a polypropylene (PP) film produced by a casting extrusion process in the plastics industry. According to different uses, it can be divided into general CPP (General CPP, GCPP for short) film, metalized CPP (Metalize CPP, MCPP for short) film and retort CPP (Retort CPP, RCPP for short) film, etc. Compared with LLDPE, LDPE, HDPE, PET, PVG and other films, CPP has lower cost, higher output, higher stiffness than PE film, excellent water vapor and odor barrier properties, and can be used as composite base film. It can be metallized, and it is generally used as food and commodity packaging and outer packagi...

Examples

Embodiment 1

[0027] Embodiment one: the preparation of homopolypropylene resin:

[0028] 1. The raw materials for the production of base resin are the following substances:

[0029] 1) Polymer grade propylene

[0030]

[0031] 2) Catalyst DQ-Ⅲ, cocatalyst TEAL, electron donor DONOR, antistatic agent Atmer163

[0032] 3) Hydrogen

[0033]

[0034] Add propylene to the loop reactor, and add catalyst DQ-Ⅲ, cocatalyst triethylaluminum (TEAL), electron donor DONOR, antistatic agent Atmer163. Among them: Catalyst DQ-Ⅲ is added according to the output of 40kg / ton; TEAL / C 3 (Propylene) = 0.16; TEAL / DONOR=10; antistatic agent Atmer163 is 2~3kg / h. Stir evenly, control the reaction temperature in the loop reactor to 70±1°C, the reaction pressure to 3.4~3.8MPa, and the hydrogen concentration to 900~1200ppm to obtain a homopolymer polypropylene resin, whose properties are shown in Table 2.

[0035]

[0036] According to the proportioning shown in table 3, get the homopolypropylene resin ...