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Polypropylene composition for film and preparation method of composition

A technology of polypropylene composition and polypropylene resin, which is applied in the field of polypropylene composition for film and its preparation, can solve the problems of inability to guarantee the performance of pellets, instability of pellet performance, and time-consuming, etc., and achieve the performance of finished products The quality is stable, the quality fluctuation is small, and the effect of reducing the intermediate links

Pending 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 result of this is that if technicians want to select a polypropylene resin with suitable performance as the base material according to the performance requirements of the CPP film special material, it generally takes many experiments to find a more suitable base material. A lot of time, and due to the randomness of the performance change, even if a more suitable base material is found, it cannot guarantee that the performance of the pellets after extrusion granulation can reach the original performance, resulting in unstable performance of the pellets. It brings a lot of inconvenience to the actual production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1: Evenly mix ethylene-propylene copolymerized polypropylene resin powder and additives in the following ratio:

[0040] Ethylene-propylene random copolymerization polypropylene resin: 93.5 parts;

[0041] Antioxidant 1010: 0.1 parts;

[0042] Auxiliary antioxidant 168: 0.05 parts;

[0043] Halogen absorbent: 0.05 parts;

[0044] Slippery agent: 0.15 parts;

[0045] Opening agent: 0.3 parts;

[0046] The melt flow rate of described ethylene-propylene random copolymerization polypropylene resin is 7g / 10min, and ethylene content is 1%;

[0047] Step 2:

[0048] Use a twin-screw extruder to extrude and granulate the uniformly mixed mixture in step 1. The screw speed of the twin-screw extruder is 183 rpm, the temperature of the extrusion cylinder is 210 ° C, and the temperature of the die head is 250 ° C. °C, the cooling water temperature is 60 °C, and the polypropylene composition for film is obtained after extrusion granulation.

[0049] The performance test res...

Embodiment 2

[0051] Step 1: Evenly mix ethylene-propylene copolymerized polypropylene resin powder and additives in the following ratio:

[0052] Ethylene-propylene random copolymerization polypropylene resin: 99.29 parts;

[0053] Antioxidant 1010: 0.12 parts;

[0054] Auxiliary antioxidant 168: 0.05 parts;

[0055] Halogen absorbent: 0.06 parts;

[0056] Slippery agent: 0.2 part;

[0057] Opening agent: 0.28 parts;

[0058] The melt flow rate of described ethylene-propylene random copolymerization polypropylene resin is 10g / 10min, and ethylene content is 3%;

[0059] Step 2:

[0060] Use a twin-screw extruder to extrude and granulate the uniformly mixed mixture in step 1. The screw speed of the twin-screw extruder is 160 rpm, the temperature of the extrusion cylinder is 180 ° C, and the temperature of the die head is 300 ° C. °C, the cooling water temperature is 55 °C, and the polypropylene composition for film is obtained after extrusion granulation.

[0061] The performance test...

Embodiment 3

[0063] Step 1: Evenly mix ethylene-propylene copolymerized polypropylene resin powder and additives in the following ratio:

[0064] Ethylene-propylene random copolymerized polypropylene resin: 99.15 parts;

[0065] Antioxidant 1010: 0.12 parts;

[0066] Auxiliary antioxidant 168: 0.05 parts;

[0067] Halogen absorbent: 0.05 parts;

[0068] Slippery agent: 0.18 parts;

[0069] Opening agent: 0.35 parts;

[0070] The melt flow rate of described ethylene-propylene random copolymerization polypropylene resin is 8g / 10min, and ethylene content is 2%;

[0071] Step 2:

[0072] Use a twin-screw extruder to extrude and granulate the uniformly mixed mixture in step 1. The screw speed of the twin-screw extruder is 250 rpm, the temperature of the extrusion cylinder is 230 ° C, and the temperature of the die head is 200 ° C. °C, the cooling water temperature is 65 °C, and the polypropylene composition for film is obtained after extrusion granulation.

[0073] The performance test r...

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Abstract

The invention discloses a polypropylene composition for a film, which comprises the following ingredients: 89.50-99.79 parts of ethylene-propylene polypropylene random copolymer resin, 0.05-0.15 partsof antioxidant 1010, 0.05-0.15 parts of auxiliary antioxidant 168, 0.01-0.15 parts of halogen absorbent, 0.05-0.5 parts of smooth agent and 0.05-0.5 parts of antiblocking agent. The polypropylene composition for the film has basically identical mechanical properties with the ethylene-propylene polypropylene random copolymer resin as a base material of the composition, and can be directly used fora cast film product without modification. The invention further provides a preparation method of the polypropylene composition for the film. The method has small influence on properties of a polypropylene base material; physical properties of the base material are basically consistent with those of a special material before and after preparation; and the property stability of the special materialfor the polypropylene cast film is ensured.

Description

technical field [0001] The invention relates to the technical field of polymer material compositions, in particular to a polypropylene composition for film and a preparation method thereof. Background technique [0002] CPP film (cast polypropylene, that is, cast polypropylene film) has the characteristics of good transparency, high gloss, good stiffness, good moisture resistance, excellent heat resistance, easy heat sealing, etc., and has been widely used in the packaging market. [0003] At present, due to the increase in the production scale of CPP films and the increasing development of extrusion equipment, the amount of raw materials used and the types of raw materials that can be selected are increasing, so that the special materials for CPP films are becoming more refined and specialized. and develop in the direction of higher performance. A variety of special materials with a more refined division of labor are constantly emerging, and each material plays its own rol...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08K13/02C08K5/098C08K5/20C08K3/36C08J5/18
CPCC08J5/18C08J2323/16C08K13/02C08K5/20C08K3/36C08K5/098
Inventor 蒋文军梁胜彪梁志斌刘国禹倪春霞卢瑞真易沁桦柯君豪
Owner CHINA PETROLEUM & CHEM CORP
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