Low-density and low-diffusivity polypropylene material and preparation method thereof

Abstract

The invention discloses a polypropylene material with low density and low diffusivity. The polypropylene material comprises the following components in parts by weight: 70-90 parts of polypropylene resin, 0.1-10 parts of elastomer, 3-10 parts of filler, 1-5 parts of deodorant, 1-5 parts of assistant master batch and 1-2 parts of foaming agent, the alloy material has the advantages of favorable flowability, low density and higher rigidity and toughness, and can satisfy the performance requirements for thin-walled automotive upholstery. The invention also discloses a preparation method of the material. The preparation method comprises the following steps: S1, weighing raw materials; S2, conveying polypropylene resin and an elastomer into a double-screw extruder through a main feeding assembly, uniformly mixing a deodorant and the auxiliary master batch, conveying the mixture into the double-screw extruder through an auxiliary feeding assembly, conveying a filler into the double-screw extruder through a side feeding assembly, mixing, melting, extruding, bracing, cooling and pelletizing to obtain an intermediate product; and S3, performing devolatilization treatment on the intermediateproduct to obtain the low-density and low-emission polypropylene material, and the preparation method is simple in process, easy in condition control and suitable for large-scale production.

Description

technical field

[0001] The invention relates to the technical field of modified polypropylene materials for automotive interior decoration, in particular to low-density, low-emission polypropylene materials and a preparation method. Background technique

[0002] Automobile lightweight is a systematic project, which involves structural design of related parts, manufacturer's production equipment capability level, part manufacturing process and part material selection, etc. For the current automotive interior plastic parts, since most of them use modified polypropylene materials, realizing the lightweight of such materials can make a great contribution to the lightweight of automotive interior plastic parts. Since the modified polypropylene materials used for automotive interior plastic parts have odor and VOC requirements, the developed lightweight modified polypropylene materials also need to meet these requirements.

[0003] CN111073140A discloses a low-density, low-odor a...

Examples

Embodiment 1

[0030] Embodiment one, a kind of preparation method of low-density, low emission polypropylene material, it comprises the steps:

[0031] S1, preparing materials, weighing a sufficient amount of polypropylene resin, elastomer, deodorant, additive masterbatch and filler for standby;

[0032] S2, the polypropylene resin and elastomer are conveyed to the twin-screw extruder through the main feeding assembly from the main feeding port, and the deodorant and additive masterbatch are evenly mixed through the auxiliary feeding assembly from the auxiliary feeding port Transported to the twin-screw extruder, the filler is delivered to the twin-screw extruder from the side feed port through the side feed assembly. Set automatic feeding system parameter in proportion, make automatic feeding system by the polypropylene resin of 83 parts by weight, the basic magnesium sulfate whisker of 5 parts by weight, the hollow glass microsphere of 3 parts by weight, the auxiliary agent of 2 parts by ...

Embodiment 2

[0035] Embodiment two, select the twin-screw extruder identical with embodiment one, set automatic feeding system parameter in proportion, make automatic feeding system press the polypropylene resin of 79 parts by weight, the talcum powder of 3 parts by weight, the talcum powder of 5 parts by weight The basic magnesium sulfate whisker of 6 parts, the hollow glass microsphere of 3 parts by weight, the additive masterbatch of 2 parts by weight, the deodorant of 2 parts by weight, the elastomer POE ratio feeding of 6 parts by weight, all the other processing parameters Same as Example 1, a low-density, low-emission polypropylene material was obtained.

Embodiment 3

[0036] Embodiment three, select the twin-screw extruder identical with embodiment one, set automatic feeding system parameter in proportion, make automatic feeding system press the polypropylene resin of 76 parts by weight, the talcum powder of 6 parts by weight, the talcum powder of 5 parts by weight The basic magnesium sulfate whisker of 6 parts, the hollow glass microsphere of 3 parts by weight, the additive masterbatch of 2 parts by weight, the deodorant of 2 parts by weight, the elastomer POE ratio feeding of 6 parts by weight, all the other processing parameters Same as Example 1, a low-density, low-emission polypropylene material was obtained.

technical field

[0001] The invention relates to the technical field of modified polypropylene materials for automotive interior decoration, in particular to low-density, low-emission polypropylene materials and a preparation method. Background technique

[0002] Automobile lightweight is a systematic project, which involves structural design of related parts, manufacturer's production equipment capability level, part manufacturing process and part material selection, etc. For the current automotive interior plastic parts, since most of them use modified polypropylene materials, realizing the lightweight of such materials can make a great contribution to the lightweight of automotive interior plastic parts. Since the modified polypropylene materials used for automotive interior plastic parts have odor and VOC requirements, the developed lightweight modified polypropylene materials also need to meet these requirements.

[0003] CN111073140A discloses a low-density, low-odor a...

Examples

Embodiment 1

[0030] Embodiment one, a kind of preparation method of low-density, low emission polypropylene material, it comprises the steps:

[0031] S1, preparing materials, weighing a sufficient amount of polypropylene resin, elastomer, deodorant, additive masterbatch and filler for standby;

[0032] S2, the polypropylene resin and elastomer are conveyed to the twin-screw extruder through the main feeding assembly from the main feeding port, and the deodorant and additive masterbatch are evenly mixed through the auxiliary feeding assembly from the auxiliary feeding port Transported to the twin-screw extruder, the filler is delivered to the twin-screw extruder from the side feed port through the side feed assembly. Set automatic feeding system parameter in proportion, make automatic feeding system by the polypropylene resin of 83 parts by weight, the basic magnesium sulfate whisker of 5 parts by weight, the hollow glass microsphere of 3 parts by weight, the auxiliary agent of 2 parts by ...

Embodiment 2

[0035] Embodiment two, select the twin-screw extruder identical with embodiment one, set automatic feeding system parameter in proportion, make automatic feeding system press the polypropylene resin of 79 parts by weight, the talcum powder of 3 parts by weight, the talcum powder of 5 parts by weight The basic magnesium sulfate whisker of 6 parts, the hollow glass microsphere of 3 parts by weight, the additive masterbatch of 2 parts by weight, the deodorant of 2 parts by weight, the elastomer POE ratio feeding of 6 parts by weight, all the other processing parameters Same as Example 1, a low-density, low-emission polypropylene material was obtained.

Embodiment 3

[0036] Embodiment three, select the twin-screw extruder identical with embodiment one, set automatic feeding system parameter in proportion, make automatic feeding system press the polypropylene resin of 76 parts by weight, the talcum powder of 6 parts by weight, the talcum powder of 5 parts by weight The basic magnesium sulfate whisker of 6 parts, the hollow glass microsphere of 3 parts by weight, the additive masterbatch of 2 parts by weight, the deodorant of 2 parts by weight, the elastomer POE ratio feeding of 6 parts by weight, all the other processing parameters Same as Example 1, a low-density, low-emission polypropylene material was obtained.

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