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Polypropylene material filled with inorganic mineral powder, and its preparation method and application

A technology of inorganic mineral powder and polypropylene, which is applied in the field of inorganic mineral powder filled polypropylene material and its preparation, can solve the problems of reduced folding resistance of PP hinges, poor heat resistance of pure PP, etc., and achieves high thermal deformation temperature and excellent cold resistance. The effect of the properties and the simple preparation method

Inactive Publication Date: 2011-10-05
SHANGHAI KINGFA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat resistance of pure PP is poor. In some occasions where the ambient temperature is relatively high (such as the wire harness channel material around the automobile engine), its application as a hinge material is limited. For this reason, pure PP must be modified. , to improve its heat resistance
[0004] The usual way to improve the heat resistance of PP is to add inorganic fillers such as calcium carbonate, talcum powder, mica, wollastonite and barium sulfate. On the one hand, it can improve the heat resistance of PP and reduce the cost. After the inorganic powder, the folding resistance of the PP hinge will inevitably decrease, so an appropriate toughening agent should be added at the same time to improve the toughness of the PP hinge material filled with inorganic mineral powder, thereby improving the folding resistance of the hinge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 84 kilograms of homopolypropylene (melt flow rate under 230 ℃, 2.16kg pressure conditions are 10g / 10min, molecular weight 100,000), 0.5 kilograms of phenolic heat stabilizer Irganox 1010 (CIBA company), 0.5 kilograms of lubricant stearin calcium carbonate, 5 kg of toughening agent high-density polyethylene, and 10 kg of inorganic filler calcium carbonate were melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 40:1. The outlet temperature is 200° C., extruded and granulated, and finally the product is obtained.

[0026] The obtained product has excellent hinge folding fatigue resistance, good comprehensive mechanical properties, excellent cold resistance and high heat distortion temperature, and its hinge folding resistance is similar to that of pure PP, tensile strength ≥ 30MPa, flexural modulus ≥ 2000MPa , heat distortion temperature ≥ 115 ℃, can be used in a wide temperature range of -35 ~ 85 ℃ for a long time without affecting its...

Embodiment 2

[0031] 69 kilograms of copolymerized polypropylene (melt flow rate under 230 ℃, 2.16kg pressure conditions are 50g / 10min, molecular weight 200,000), 0.5 kilograms of phenolic heat stabilizer Irganox 1010 (CIBA company), 0.5 kilograms of lubricant stearic acid Zinc, 10 kg of toughening agent linear low-density polyethylene, and 20 kg of talcum powder are melt-mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 40:1. at 200°C, extrude and granulate, and finally obtain the product.

[0032] The obtained product has excellent hinge folding fatigue resistance, good comprehensive mechanical properties, excellent cold resistance and high heat distortion temperature, and its hinge folding resistance is similar to that of pure PP, tensile strength ≥ 30MPa, flexural modulus ≥ 2000MPa , heat distortion temperature ≥ 115 ℃, can be used in a wide temperature range of -35 ~ 85 ℃ for a long time without affecting its performance.

[0033] The performance is shown...

Embodiment 3

[0037] 54 kilograms of polypropylene (homopolymerization and copolymerization polypropylene each 50%, 230 ℃, the melt flow rate under 2.16kg pressure conditions are 50g / 10min, molecular weight is respectively 100,000 and 200,000), 0.3 kilograms of phenolic thermal stability Agent Irganox 1010 (CIBA company), 0.2 kg of phosphite heat stabilizer 168, 0.5 kg of lubricant magnesium stearate, 15 kg of toughening agent ethylene-octene copolymer, 30 kg of mica in aspect ratio of 40: 1. Melt, mix and disperse in a twin-screw extruder, the temperature of melt, mix and disperse is 170-240°C, the extrusion temperature is 200°C, extrude and granulate, and finally get the product.

[0038] The resulting product has excellent hinge folding fatigue resistance, good comprehensive mechanical properties, excellent cold resistance and high heat distortion temperature, and its hinge folding resistance is similar to that of pure PP, with tensile strength ≥ 30MPa and flexural modulus ≥ 2000MPa , He...

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Abstract

The invention discloses a polypropylene material filled with inorganic mineral powder, and its preparation method and application. The polypropylene material comprises, by weight, 43 to 90% of polypropylene, 0 to 1% of a heat stabilizer, 0 to 1% of a lubricant, 0 to 15% of a flexibilizer and 10 to 40% of an inorganic mineral powder filler, wherein the inorganic mineral powder filler is one selected from the group consisting of calcium carbonate, powdered steatile, kaolin, mica, wollastonite, glass microballoons, ceramic microspheres and barium sulfate or a mixture of the above-mentioned materials. When used as a material for hinges, the polypropylene material filled with inorganic mineral powder in the invention has excellent folding resistance which is similar to that of a pure polypropylene material, good fatigue durability and comprehensive mechanical properties, outstanding cold resistance and high thermal deformation temperature, wherein tensile strength is no less than 30 MPa, flexural modulus is no less than 2000 MPa, the thermal deformation temperature is no less than 110 DEG C; the material can be used for a long time at a temperature of from -35 to 85 DEG C and can be used to prepare hinge materials which have requirements for high heat resistance and cold resistance.

Description

technical field [0001] The invention relates to a polypropylene material filled with inorganic mineral powder and a preparation method thereof, in particular to a polypropylene hinge material with high requirements on cold resistance and heat resistance and a preparation method thereof. Background technique [0002] During the repeated folding process of polymer materials, the front and back sides of the material are repeatedly subjected to tensile and bending stresses. Therefore, polymer materials used as hinge parts must have excellent resistance to folding fatigue. [0003] Polypropylene (PP), also known as pleated glue, as long as the injection molding process is proper and the mold is flawless, when it is made into a hinge material, the hinge can withstand 10 7 The number of times of folding without obvious cracking is the best fatigue resistance among general-purpose polymers, so it is widely used as hinge material. However, the heat resistance of pure PP is poor. In ...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08K13/02C08K3/26C08K3/34C08K3/30C08K13/04C08K7/20C08K7/18
Inventor 孙刚周英辉丁超陈广强罗忠富
Owner SHANGHAI KINGFA SCI & TECH
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