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Preparation method of polypropylene composite material used for shell cover of storage battery

A composite material and battery shell technology, applied in the field of polymer compound preparation, can solve the problems of gap, poor flame retardancy and transparency, low impact strength, etc., achieve high flame retardant efficiency, improve transparency, and improve low-temperature impact resistance Effect

Active Publication Date: 2016-05-04
MIANYANG HONGQI NEW MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing copolymerized polypropylene EPF30R (7% ethylene and PP copolymer) has good processability and rigidity, but its impact strength at room temperature and low temperature is low, and its flame retardancy and transparency are poor. ) requirements still have a large gap (as shown in Table 1)
[0003] Table 1: PP Impact Grade Performance Comparison

Method used

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  • Preparation method of polypropylene composite material used for shell cover of storage battery
  • Preparation method of polypropylene composite material used for shell cover of storage battery
  • Preparation method of polypropylene composite material used for shell cover of storage battery

Examples

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Effect test

Embodiment 1

[0030] A preparation method of polypropylene composite material used for battery case covers, the steps are: weighing powder PP (10g) that has been dried at 75°C for 2 hours, highly transparent homopolymer PP (85g), EPEM Propylene rubber (5g), add nucleating agent (0.1g), silicon-based flame retardant (1.0g) and antimony oxide flame retardant (1.5g), and then mix well. Pour the mixture into a high-speed mixer at room temperature, and perform high-speed stirring and mixing for 5 minutes to uniformly disperse polypropylene and various additives. Then the mixed material is added to the feeding funnel of the twin-screw extruder with a rotational speed of 12r / min, and the mixed material is melted, extruded, Cooling, pelletizing, and drying in a hopper dryer at 85°C for 4 hours to obtain a transparent polypropylene composite material; injection molding the prepared transparent polypropylene composite material (according to requirements or requirements) to obtain a battery case Cove...

Embodiment 2

[0032] A preparation method for polypropylene composite materials used for battery case covers, the steps are: weighing powder PP (10g) that has been dried at 75°C for 2 hours, highly transparent homopolymer PP (84g), EPEM Propylene rubber (10g), add nucleating agent (0.1g), silicon-based flame retardant (1.0g) and antimony oxide flame retardant (1.0g), then mix well. Pour the mixture into a high-speed mixer at room temperature, and perform high-speed stirring and mixing for 5 minutes to uniformly disperse polypropylene and various additives. Then the mixed material is added to the feeding funnel of the twin-screw extruder with a rotational speed of 12r / min, and the mixed material is melted, extruded, Cooling, pelletizing, and drying in a hopper dryer at 85°C for 4 hours to obtain a transparent polypropylene composite material; injection molding the prepared transparent polypropylene composite material (according to requirements or requirements) to obtain a battery case Cover...

Embodiment 3

[0034] A preparation method for polypropylene composite materials used for battery case covers, the steps are: weighing powder PP (20g) that has been dried at 75°C for 2 hours, highly transparent homopolymer PP (70g), EPEM Propylene rubber (15g), add nucleating agent (0.2g), silicon-based flame retardant (1.0g) and antimony oxide flame retardant (1.0g), and then mix well. Pour the mixture into a high-speed mixer at room temperature, and perform high-speed stirring and mixing for 5 minutes to uniformly disperse polypropylene and various additives. Then the mixed material is added to the feeding funnel of the twin-screw extruder with a rotational speed of 12r / min, and the mixed material is melted, extruded, Cooling, pelletizing, and drying at 85°C in a hopper dryer for 4 hours to obtain a translucent polypropylene composite material; injection molding of the prepared translucent polypropylene composite material (according to requirements or requirements) to obtain a Polypropyle...

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Abstract

The invention discloses a preparation method of a polypropylene composite material used for a shell cover of a storage battery. The preparation method is characterized by comprising the following steps: taking the following raw materials in parts by weight: 10 to 20 parts of dried raw material PP (Polypropylene) powder, 70 to 85 parts of high-transparency homopolymerized PP, 5 to 15 parts of ethylene propylene diene monomer, 0.1 to 0.3 part of a nucleating agent of the raw materials, 0.5 to 1 part of a silicon flame retardant and 1 to 2 parts of an antimony oxide flame retardant; mixing all the raw materials to obtain a mixture; pouring the mixture into a mixing machine, and stirring and mixing for 5 to 10 minutes; then adding the mixture into a double-screw extruder, and fusing, extruding, cooling, dicing and drying; injecting and molding to prepare the polypropylene composite material used for the shell cover of the storage battery. The composite material prepared by the invention has good mechanical properties and high-temperature-resisting and low-temperature-resisting stability properties, is particularly suitable for the shell cover of the storage battery, and also can be used for fields including packages with high transparency requirements, medical equipment, household articles, common industries and the like.

Description

technical field [0001] The invention belongs to the preparation of polymer compounds, and relates to a preparation method of polypropylene composite material used for storage battery case covers. The polypropylene composite material prepared by the invention is particularly suitable for battery case covers, and can also be used in fields such as packaging, medical equipment, household products, general industry and the like that require high transparency. Background technique [0002] Alkaline batteries have been widely used in energy systems such as starting, traction, lighting, and communication. The shell and cover materials are mostly polypropylene (referred to as PP)-based materials, and other thermoplastic polymer materials, such as ethylene-propylene copolymers, acrylonitrile, etc. - Butadiene-styrene copolymer, nylon, acrylonitrile-styrene copolymer, methyl methacrylate-butadiene-styrene copolymer, etc. In the prior art, the PP resins used by battery factories are g...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/16C08K3/22
CPCC08L23/12C08L2201/02C08L2201/10C08L2201/22C08L2205/025C08L2205/03C08L2205/24C08L23/16C08K3/2279
Inventor 曾学良卓勇刘才林杨海君汪学军曾昌明郑中英任先艳李秀春
Owner MIANYANG HONGQI NEW MATERIAL SCI & TECH
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