A kind of multi-color TPO automobile interior material and preparation method thereof

[0028] Example 1

[0029] A multi-color TPO automotive interior material, which sequentially includes a polyolefin sponge layer, a multi-color TPO skin layer and a water-based polyurethane coating from bottom to top; the multi-color TPO skin layer is composed of at least two monochromatic TPO skins. Each single color TPO skin includes the following components in parts by weight: 30 parts of high-density polyethylene, 30 parts of polypropylene, 8 parts of ethylene-acrylic acid copolymer, 40 parts of EPDM rubber, rosin resin 18 parts, 5 parts of wollastonite, 3 parts of color masterbatch, 1 part of hindered amine, 1 part of hindered phenol, 1 part of magnesium hydroxide; the content of toner in the color masterbatch is 50wt%.

[0030] The preparation method of the above-mentioned multi-color TPO automotive interior materials includes the following steps:

[0031] 1) Preparation of single-color TPO skin: mix the components of the TPO skin layer uniformly, and then add them to the extruder

[0036] Example 2

[0037] A multi-color TPO automotive interior material, which sequentially includes a polyolefin sponge layer, a multi-color TPO skin layer and a water-based polyurethane coating from bottom to top; the multi-color TPO skin layer is composed of at least two monochromatic TPO skins. Each single color TPO skin includes the following components in parts by weight: 20 parts of high-density polyethylene, 40 parts of polypropylene, 5 parts of ethylene-acrylic acid copolymer, 50 parts of EPDM rubber, rosin resin 15 parts, 3 parts of talc powder, 6 parts of color masterbatch, 1 part of hindered amine, 2 parts of aromatic amine, 2 parts of aluminum hydroxide; the content of color powder in the color masterbatch is 45% by weight.

[0038] The preparation method of the above-mentioned multi-color TPO automotive interior materials includes the following steps:

[0039] 1) Preparation of single-color TPO skin: mix the components in the TPO skin layer uniformly, enter the extruder

[0044] Example 3

[0045] A multi-color TPO automotive interior material, which sequentially includes a polyolefin sponge layer, a multi-color TPO skin layer and a water-based polyurethane coating from bottom to top; the multi-color TPO skin layer is composed of at least two monochromatic TPO skins. Each single-color TPO skin includes the following components in parts by weight: 40 parts of high-density polyethylene, 20 parts of polypropylene, 10 parts of ethylene-acrylic acid copolymer, 30 parts of EPDM rubber, terpene 20 parts of resin, 8 parts of barium sulfate, 2 parts of color masterbatch, 1 part of hindered amine, 3 parts of hindered phenol, 2 parts of red phosphorus; the content of toner in the color masterbatch is 45% by weight.

[0046] The preparation method of the above-mentioned multi-color TPO automotive interior materials includes the following steps:

[0047] 1) Preparation of single-color TPO skin: mix the components in the TPO skin layer uniformly, enter the extruder t