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Polypropylene material with high ultrasonic welding strength and preparation method therefor

A technology of ultrasonic welding and polypropylene materials, which is applied in the field of polymer composite materials, can solve the problems of increasing the melting degree of welding surface materials, increasing welding depth and welding strength, and affecting other mechanical properties of materials, so as to improve welding strength and improve Low cost, promotion of conduction and heat absorption

Active Publication Date: 2019-12-10
合肥科拜尔新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main factor affecting ultrasonic welding is the heat transfer of plastics. Plastics with good transfer properties are easier to weld than plastics with poor transfer properties. Polypropylene has poor thermal conductivity. Usually, it can be improved by increasing the welding time and increasing the ultrasonic vibration frequency. , prolong the welding time, etc. to increase the welding strength of the welding surface, but in some special cases, the welding equipment cannot be set differently according to different materials. Adjustment, in the process of ultrasonic welding, improve the loss modulus, increase the melting degree of the welding surface material, and then increase the welding depth and welding strength
In terms of materials, the usual method of modifying thermally conductive polypropylene materials is to add alumina and silicon carbide, but the addition ratio is more than 50%, which greatly affects other mechanical properties of the material and the cost is very high, so it cannot be applied to ordinary modification that requires welding. on polypropylene

Method used

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  • Polypropylene material with high ultrasonic welding strength and preparation method therefor
  • Polypropylene material with high ultrasonic welding strength and preparation method therefor
  • Polypropylene material with high ultrasonic welding strength and preparation method therefor

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Effect test

Embodiment 1

[0029] Polypropylene material with high ultrasonic welding strength:

[0030] Polypropylene 64.2kg Dow POE8200 12kg Polypropylene maleic anhydride graft 2kg Inorganic filler masterbatch 18kg furfuryl methacrylate 1kg N,N'-(4,4'-Methylenediphenyl)bismaleimide 1kg Irgafos168 0.6kg UV-327 0.6kg Calcium stearate 0.6kg

[0031] The preparation method of the above-mentioned raw materials is as follows: put the above-mentioned raw materials in a high-speed mixer and mix them at a speed of 800 rpm for 4 minutes, then put the mixed materials into an extruder to melt and extrude and pelletize at a speed of 320 rpm. Use a pelletizer to pelletize at a speed of 800rpm; the extruder is a twin-screw extruder, the temperature of the barrel is 180°C, the temperature of the feeding section is 170°C, the temperature of the compression section is 180°C, and the temperature of the plasticizing section is 185°C , The temperature...

Embodiment 2

[0033] Polypropylene material with high ultrasonic welding strength:

[0034] Polypropylene 58.1kg POE8200 15kg Polypropylene maleic anhydride graft 1.8kg Inorganic filler masterbatch 20kg furfuryl methacrylate 1.08kg N,N'-(4,4'-Methylenediphenyl)bismaleimide 1.62kg Hindered amines 944 0.8kg UV-360 0.8kg Calcium stearate 0.8kg

[0035] The preparation method of the above-mentioned raw materials is as follows: put the above-mentioned raw materials into a high-speed mixer and mix them at a speed of 1200 rpm for 4 minutes, then put the mixed materials into an extruder to melt and extrude at a speed of 350 rpm, and granulate. Use a pelletizer to pelletize at a speed of 700rpm; the extruder is a twin-screw extruder, the temperature of the barrel is 170°C, the temperature of the feeding section is 170°C, the temperature of the compression section is 180°C, and the temperature of the plasticizing section is 185°C ...

Embodiment 3

[0037] Polypropylene material with high ultrasonic welding strength:

[0038] Polypropylene 72kg POE8200 8kg Inorganic filler masterbatch 15kg furfuryl methacrylate 1.94kg N,N'-(4,4'-Methylenediphenyl)bismaleimide 1.56kg DSTDP 0.5kg UV-244 0.5kg Calcium stearate 0.5kg

[0039] The preparation method of the above-mentioned raw materials is as follows: put the above-mentioned raw materials in a high-speed mixer and mix them at a speed of 900 rpm for 4 minutes, then put the mixed materials into an extruder to melt and extrude at a speed of 300 rpm, and granulate. Use a pelletizer to pelletize at a speed of 850rpm; the extruder is a twin-screw extruder, the temperature of the barrel is 190°C, the temperature of the feeding section is 175°C, the temperature of the compression section is 175°C, and the temperature of the plasticizing section is 185°C , The homogenization section temperature is 190°C, and the die opening...

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Abstract

The invention discloses a polypropylene material with high ultrasonic welding strength. The polypropylene material is prepared from the following raw materials in parts by weight: 44-82.6 parts of polypropylene, 5-20 parts of toughener, 1-3 parts of couplant, 8-25 parts of inorganic filling master batch, 3-5 parts of ultrasonic welding sensitizer, 0.2-1 part of thermal stabilizer, 0.1-1 part of photostabilizer and 0.1-1 part of processing aid. A preparation method for the polypropylene material comprises the steps: weighing all the raw materials; and mixing all the raw materials, and subjecting the mixed material to melt extrusion by an extruder and granulation, thereby obtaining the polypropylene material with improved ultrasonic welding strength. The polypropylene material disclosed by the invention can be used for promoting conduction of ultrasonic energy and absorption of heat, and thus, the weld strength of a polypropylene weld face is improved.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials, in particular to a modified polypropylene material with high ultrasonic welding strength and a preparation method thereof. Background technique [0002] Polypropylene (PP) has a simple synthesis process, good balance, easy processing, high performance and low price, and has become one of the fastest growing varieties of plastics. [0003] Ultrasonic welding is a kind of heat welding, and its outstanding advantages are: fast speed, high efficiency, low energy consumption, high welding strength, which can reach the strength of the material itself, no need to add solvents, binders or other auxiliary products during welding; welding materials No surface damage, simple operation, easy to realize mechanization and automation; widely used in automotive, electronics, aerospace and other fields. [0004] The main factor affecting ultrasonic welding is the heat transfer of plastics. Pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/00C08L51/06C08K13/02C08K3/34C08K5/3415C08K5/1535
CPCC08L53/00C08L51/06C08K13/02C08K3/34C08K5/3415C08K5/1535
Inventor 姜之涛周正发王杰中
Owner 合肥科拜尔新材料股份有限公司