Injection-molded type TPO (thermoplastic polyolefin) compound for sound-insulating pads for automobiles as well as preparation method of compound

An injection molding and compound technology, applied in the field of polymer materials and their molding and processing, can solve the problems of poor fluidity and difficulty in injection molding, and achieve the effects of improving mold release, smooth mold release, and good moldability.

Inactive Publication Date: 2015-04-29
SHANGHAI KINGFA SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problems that the heavy TPO material filled with high powder for automobile sound insulation pads to be solved by the present

Method used

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  • Injection-molded type TPO (thermoplastic polyolefin) compound for sound-insulating pads for automobiles as well as preparation method of compound
  • Injection-molded type TPO (thermoplastic polyolefin) compound for sound-insulating pads for automobiles as well as preparation method of compound

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1

[0020] 30 kg of polypropylene PP T30S, 30 kg of thermoplastic elastomer SBR YH503, 5 kg of linear low density polyethylene LLDPE grafted with maleic anhydride graft Bondyram 4108, 0.4 kg of phenolic antioxidant 1010, 0.4 kg of sub Phosphate antioxidant 168 and 1.2 kg of processing aid EBS are melt-mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 40:1. 53 kg of barium sulfate is fed into the twin-screw extruder from the side through a weight loss metering scale. After exiting the machine, the temperature of each section of the extruder is set at 190~225℃ for extrusion granulation, and finally the product is obtained.

[0021] Test its performance according to the corresponding standards, the list is as follows:

[0022] Table 1

[0023] Performance

[0024] Elongation at break

Example Embodiment

[0025] Example 2

[0026] 7 kg of polypropylene PP Z30S, 15 kg of thermoplastic polyurethane elastomer 1185A, 2 kg of HDPE (high density polyethylene) grafted with maleic anhydride graft Bondyram 5101, 0.2 kg of phenolic antioxidant 1010, 0.2 kg of phosphite Antioxidant 168 and 0.6 kg processing aid EBS are melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 40:1. 75 kg 3000 mesh talc powder is fed into the twin-screw extruder from the side through a weightless metering scale. The temperature of each section of the extruder and the extruder is set at 190~225℃, and the product is finally obtained by extrusion and granulation.

[0027] Test its performance according to the corresponding standards, the list is as follows:

[0028] Table 2

[0029] Performance

Example Embodiment

[0030] Example 3

[0031] 12 kg of polyolefin POE thermoplastic elastomer DF610, 1 kg of ethylene-α-octene copolymer maleic anhydride graft 493D, 1 kg of phosphate polypropylene special nucleating agent HPN-20E, 0.3 kg of phenolic antioxidant Agent 1010, 0.2 kg of phosphite antioxidant 627A, 0.5 kg of processing aid calcium stearate are melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 40:1, and 75 kg of barium sulfate is passed through a weightless weighing scale Feed the material from the side into the twin-screw extruder, set the temperature of each section of the extruder at 190-225°C, extrude and pelletize, and finally obtain the product.

[0032] Test its performance according to the corresponding standards, the list is as follows:

[0033] table 3

[0034] Performance

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Abstract

The invention discloses an injection-molded type sound-insulating pad heavy TPO (thermoplastic polyolefin) compound capable of meeting the automobile interior emission requirement as well as a preparation method of the compound. The sound-insulating pad TPO compound consists of 0-30wt% of PP (polypropylene), 12-30wt% of a thermoplastic elastomer, 1-5wt% of a polar monomer grafted olefin polymer, 0-1wt% of a special nucleating agent for PP, 1-2wt% of a processing aid and 53-85% of inorganic filler. The preparation method comprises steps as follows: the PP, the thermoplastic elastomer, the polar monomer grafted olefin polymer, the special nucleating agent for the PP and the processing aid are molten, mixed and dispersed in a twin-screw extruder, inorganic powder is added to the twin-screw extruder through a weight-loss type measuring scale in a side feeding manner, extrusion and granulation are performed, and the compound is obtained finally. The material has the characteristics of good sound-insulating and noise-reducing effect and low emission, the performance requirement for sound-insulating pad materials for automobiles is met, and injection molding of the heavy TPO material is realized.

Description

technical field [0001] The invention relates to an injection-molded TPO compound for automobile sound insulation pads and a preparation method thereof, belonging to the field of polymer materials and their molding and processing. Background technique [0002] Common thermoplastic polyolefin (TPO) materials generally include polypropylene resin as a base material, rubber for improving impact resistance, and inorganic fillers for improving rigidity. This type of TPO material has been maturely applied in the automotive field, mainly injection molding. The sound insulation pad in the main cockpit of the car has higher requirements for sound insulation and noise reduction, so the trend of material development is to increase the density of the material. In the case of the same thickness, the greater the density, the greater the sound insulation and the better the effect. [0003] TPO materials have been partially applied in the field of sound insulation pad skin. Most of the tra...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08L9/06C08L51/06C08L75/04C08L53/02C08L23/08C08K13/02C08K3/30C08K3/34C08K5/098C08K5/20B29C47/92B29C48/92
CPCC08L23/10B29C48/92C08K2201/005C08L9/06C08L23/0815C08L53/025C08L75/04C08L2205/02C08L2205/03C08L2207/04C08L51/06C08K13/02C08K2003/3045C08K5/20C08K3/34C08K5/098
Inventor 赵斌周英辉孙刚程文超李国明陈延安
Owner SHANGHAI KINGFA SCI & TECH
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