High-wear-resistance TPO (thermoplastic polyolefin) automotive interior carpet material and preparation method thereof

Abstract

The invention discloses a high-wear-resistance TPO automobile interior carpet material and a preparation method thereof, and belongs to the technical field of TPO automobile interior materials.The material is prepared from, by mass, 30-60 parts of CO-PP resin, 10-20 parts of PE resin, 5-30 parts of polyolefin elastomer, 5-20 parts of TPV, 5-10 parts of dynamically vulcanized thermoplastic silicon-based elastomer Si-TPV and 0-3 parts of high-molecular-weight polysiloxane master batch. According to the present invention, the TPO material has good wear resistance, and can meet the high wear resistance and high scratch resistance requirements of the automobile carpet.

Description

Technical Field

[0001] The invention belongs to the technical field of TPO automobile interior materials, and particularly relates to a highly wear-resistant TPO automobile interior carpet material and a preparation method thereof. Background Art

[0002] Automotive interior materials are not only required to have a good appearance, but also to have wear resistance, scratch resistance, and anti-slip properties. Most existing TPO materials do not meet these requirements. The present invention dynamically vulcanizes a thermoplastic silicone elastomer with a special additive to provide superior wear and scratch resistance. Summary of the Invention

[0003] In response to the above-mentioned deficiencies in the prior art, the present application provides a highly wear-resistant TPO automotive interior carpet material and a preparation method thereof, which solves the technical problems existing in the prior art that the wear and scratch resistance of most TPO materials cannot meet the requirements of automotive interior carpets, improves the wear and scratch resistance of TPO materials, enables them to meet the requirements of automotive interior carpets, and can be widely used in the application of other parts of automotive interiors.

[0004] The technical solution adopted in the present invention is as follows:

[0005] A highly wear-resistant TPO automotive interior carpet material is composed, by weight, of 30-60 parts of CO-PP resin, 10-20 parts of PE resin, 5-30 parts of polyolefin elastomer, 5-20 parts of TPV, 5-10 parts of dynamically vulcanized thermoplastic silicone-based elastomer Si-TPV, 0-3 parts of high molecular weight polysiloxane masterbatch, 0.1-1.0 parts of antioxidant, and 0.1-1.0 parts of functional additives.

[0006] Preferably, the CO-PP resin has a melt index of 4-60 g / 10 min, a melting point of 145° C.-170° C., and a shore A hardness of 80-100.

[0007] Preferably, the CO-PP resin is 7585 or 8285, and the melt index of the CO-PP resin is 30-60 g / 10 min@230°C.

[0008] Preferably, the PE resin is linear low-density polyethylene with a melt index of 2-20 g / 10 min and a melting point of 104° C.-125° C.

[0009] Preferably, the PE resin is 7042, and the melt index of the PE resin is 2-10 g / 10 min@190°C.

[0010] Preferably, the polyolefin elastomer is one or more of an ethylene-butene copolymer elastomer, an ethylene-octene copolymer elastomer, and a propylene copolymer elastomer; the TPV is a dynamically vulcanized polyolefin TPV with a shoreA hardness of 55-95 and a melting point of 145°C-170°C; the dynamically vulcanized thermoplastic silicone-based elastomer Si-TPV has a melt index of 4-50g / 10min and a shoreA hardness of 50-90; the high molecular weight silicone masterbatch has a melt index of 2-3g / 10min and a melting point of 145°C-170°C, the antioxidant is antioxidant 1010 and / or antioxidant 168, the functional additives are a compatibilizer and a masterbatch, and the high molecular weight polysiloxane masterbatch has a shoreA hardness of 55-90, a melting point of 145°C-170°C, and a melt index of 2-3g / 10min.

[0011] Preferably, the mass ratio of antioxidant 1010: antioxidant 168 is 2:1, the mass ratio of the compatibilizer to the masterbatch is compatibilizer: masterbatch = 1:1; and the high molecular weight polysiloxane masterbatch is a high molecular weight silicone masterbatch.

[0012] Preferably, the compatibilizer is palmitic acid and the masterbatch is PE base carbon black.

[0013] The present application also discloses a method for preparing any of the above-mentioned high-wear-resistant TPO automotive interior carpet materials, comprising the following steps:

[0014] Step 1: Weigh polyolefin elastomer, CO-PP resin, PE resin, TPV, dynamically vulcanized thermoplastic silicone elastomer Si-TPV, high molecular weight silicone masterbatch, color masterbatch, compatibilizer, antioxidant 1010 and antioxidant 168 according to the mass ratio;

[0015] Step 2: The materials weighed in the first step were placed in a stirring mixer and stirred for 10 minutes. After uniform mixing, the materials were added to a twin-screw extruder for extrusion and granulation. The stirring rate in the stirring mixer was 60 rpm. The process parameters of the twin-screw extruder were as follows: screw diameter: 25 mm, screw aspect ratio: 48:1, screw temperature: zone 1: 160°C, zone 2: 170°C, zone 3: 170°C, zone 4: 175°C, zone 5: 175°C, zone 6: 175°C, zone 7: 170°C, zone 8: 170°C.

[0016] The third step is cast film pressing: the particles after extrusion granulation are pressed into sheets with a thickness of 0.5-4 mm on a cast film pressing machine through single-layer extrusion or co-extrusion.

[0017] Preferably, in the first step, 930-2000g of polyolefin elastomer, 1500-2500g of CO-PP resin, 930g of PE resin, 1250g of TPV, 250g of dynamically vulcanized thermoplastic silicone-based elastomer Si-TPV, 50g of high molecular weight silicone masterbatch, 50g of palmitic acid, 20g of masterbatch PE, and 50g of antioxidant are weighed, wherein the mass ratio of antioxidant 1010: antioxidant 168 = 2:1.

[0018] Principle explanation: By adding dynamically vulcanized thermoplastic silicone elastomer Si-TPV, which is a silicone thermoplastic elastomer, it is a special silicone elastomer. It is a polysiloxane elastomer, a compatibilizer, a structure control agent and a resin that are mixed by mixing and then dynamically vulcanized and granulated in a twin-screw extruder. In this dynamically vulcanized silicone elastomer, the silicone rubber is evenly dispersed in the resin with 1-3μm particles to form a special island structure, which solves the problem of poor compatibility between TPO and silicone. This dynamically vulcanized thermoplastic silicone elastomer is a new elastomer Si-TPV. This elastomer can be effectively combined with TPO, and due to the 1-3um silicone particles, a micron-level micro-convex structure is formed on the surface of the material. At the same time, it cooperates with the high molecular weight silicone masterbatch to reduce the surface friction coefficient, so that the product has good wear resistance and scratch resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a molecular microstructure diagram of a functional additive for a highly wear-resistant TPO automotive interior carpet material;

[0020] Figure 2 This is a molecular structure diagram of the dynamically vulcanized thermoplastic silicone elastomer used in this application;

[0021] Figure 3 This is a distribution diagram of various polymer structures in this application material system. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the examples. It should be understood that the following examples are only intended to explain and illustrate the present invention, but are not intended to limit the present invention to these specific embodiments and are not intended to limit the scope of the present invention in any way.

[0023] The polyolefin elastomer used in this application is DA61 and / or POE6102;

[0024] Dynamically vulcanized polyolefin TPV is SV 2270 and / or SV 8270;

[0025] Dynamically vulcanized thermoplastic silicone elastomer Si-TPV is a vulcanized elastomer of dynamically vulcanized silicone rubber and thermoplastic elastomer, and its brand is one or more of Si-TPV 2150, 2250, and 306;

[0026] The high molecular weight polysiloxane masterbatch is high molecular weight silicone masterbatch 306C.

[0027] Example 1

[0028] A method for preparing a highly wear-resistant TPO automotive interior carpet material comprises the following steps:

[0029] Step 1: Weigh 1000g polyolefin elastomer POE6102, 2500g CO-PP resin 7585, 1250g TPV, 250g silicone-based thermoplastic elastomer Si-TPV, 50g palmitic acid, 20g masterbatch PEbase carbon black, 33.3g antioxidant 1010 and 16.7g antioxidant 168;

[0030] Step 2: Put the above materials into a blender and stir for 10 minutes, then add the evenly stirred mixture into a twin-screw extruder for blending, extrusion and granulation;

[0031] The third step is casting and sheeting: the particles after twin-screw extrusion granulation are rolled into sheets with a thickness of 0.5 mm using a casting tablet press.

[0032] Preferably, the stirring rate in the mixer in the second step is 60 rpm, the twin-screw process parameters in the twin-screw extruder are screw diameter: 25 mm, screw aspect ratio: 48:1, screw temperature: zone 1: 160°C, zone 2: 170°C, zone 3: 170°C, zone 4: 175°C, zone 5: 175°C, zone 6: 175°C, zone 7: 170°C, zone 8: 170°C.

[0033] The prepared sheets were tested for tensile strength, hardness, wear resistance and scratch resistance. The test results are listed in Table 1 and Table 2.

[0034] Example 2

[0035] Step 1: Weigh 1000g polyolefin elastomer POE6102, 2500g CO-PP resin 8285, 1250g TPV, 250g silicone-based thermoplastic elastomer Si-TPV, 50g palmitic acid, 20g masterbatch PEbase carbon black, 33.3g antioxidant 1010 and 16.7g antioxidant 168;

[0036] Step 2: Put the above materials into a blender and stir for 10 minutes, then add the evenly stirred mixture into a twin-screw extruder for blending, extrusion and granulation;

[0037] The third step is casting and sheeting: the particles after twin-screw extrusion granulation are rolled into sheets with a thickness of 0.5 mm using a casting tablet press.

[0038] Preferably, the stirring rate in the mixer in the second step is 60 rpm, the twin-screw process parameters in the twin-screw extruder are screw diameter: 25 mm, screw aspect ratio: 48:1, screw temperature: zone 1: 160°C, zone 2: 170°C, zone 3: 170°C, zone 4: 175°C, zone 5: 175°C, zone 6: 175°C, zone 7: 170°C, zone 8: 170°C.

[0039] The prepared sheets were tested for tensile strength, hardness, wear resistance and scratch resistance. The test results are listed in Table 1 and Table 2.

[0040] Example 3

[0041] A method for preparing a highly wear-resistant TPO automotive interior carpet material comprises the following steps:

[0042] Step 1: Weigh 930g low-density polyethylene 7042, 1000g polyolefin elastomer POE6102, 1500g CO-PP resin 8285, 1250g TPV, 250g silicone-based thermoplastic elastomer Si-TPV, 50g palmitic acid, 20g masterbatch PEbase carbon black, 33.3g antioxidant 1010 and 16.7g antioxidant 168;

[0043] Step 2: Put the above materials into a blender and stir for 10 minutes, then add them into a twin-screw extruder for blending, extrusion and granulation;

[0044] The third step is casting and sheeting: the particles after extrusion granulation are rolled into sheets with a thickness of 0.5 mm using a casting tablet machine.

[0045] Preferably, the stirring rate in the mixer in the second step is 60 rpm, the twin-screw process parameters in the twin-screw extruder are screw diameter: 25 mm, screw aspect ratio: 48:1, screw temperature: zone 1: 160°C, zone 2: 170°C, zone 3: 170°C, zone 4: 175°C, zone 5: 175°C, zone 6: 175°C, zone 7: 170°C, zone 8: 170°C.

[0046] The prepared sheets were tested for tensile strength, hardness, wear resistance and scratch resistance. The test results are listed in Tables 1 and 2.

[0047] Example 4

[0048] A method for preparing a highly wear-resistant TPO automotive interior carpet material comprises the following steps:

[0049] Step 1: Weigh 930g of polyolefin elastomer POE DA61, 1000g of polyolefin elastomer POE6102, 1500g of CO-PP resin 8285, 1250g of TPV, 250g of silicone-based thermoplastic elastomer Si-TPV, 50g of palmitic acid, 20g of masterbatch PEbase carbon black, 33.3g of antioxidant 1010 and 16.7g of antioxidant 168;

[0050] Step 2: Put the above materials into a blender and stir for 10 minutes, then add them into a twin-screw extruder for blending, extrusion and granulation;

[0051] The third step is casting and tableting: the particles after extrusion granulation are rolled into sheets with a thickness of 0.5 mm on a casting tablet machine.

[0052] Preferably, the stirring rate in the mixer in the second step is 60 rpm, the twin-screw process parameters in the twin-screw extruder are screw diameter: 25 mm, screw aspect ratio: 48:1, screw temperature: zone 1: 160°C, zone 2: 170°C, zone 3: 170°C, zone 4: 175°C, zone 5: 175°C, zone 6: 175°C, zone 7: 170°C, zone 8: 170°C.

[0053] The prepared sheets were tested for tensile strength, hardness, wear resistance and scratch resistance. The test results are listed in Tables 1 and 2.

[0054] Example 5

[0055] A method for preparing a highly wear-resistant TPO automotive interior carpet material comprises the following steps:

[0056] Step 1: Weigh 500g polyolefin elastomer POE6102, 2450g CO-PP resin 8285, 1000g TPV8270, 250g silicone-based thermoplastic elastomer Si-TPV 2350, 50g high molecular weight silicone masterbatch 306C, 35g color masterbatch PEbase carbon black, 10g antioxidant 1010 and 5g antioxidant 168;

[0057] Step 2: Put the above materials into a blender and stir for 10 minutes, then add them into a twin-screw extruder for blending, extrusion and granulation;

[0058] The third step is casting and tableting: the particles after extrusion granulation are rolled into sheets with a thickness of 0.5 mm on a casting tablet machine.

[0059] Preferably, the stirring rate in the mixer in the second step is 60 rpm, the twin-screw process parameters in the twin-screw extruder are screw diameter: 25 mm, screw aspect ratio: 48:1, screw temperature: zone 1: 160°C, zone 2: 170°C, zone 3: 170°C, zone 4: 175°C, zone 5: 175°C, zone 6: 175°C, zone 7: 170°C, zone 8: 170°C.

[0060] The prepared sheets were tested for tensile strength, hardness, wear resistance and scratch resistance. The test results are listed in Tables 1 and 2.

[0061] Table 1:

[0062] Example 1 Example 2 Example 3 Example 4 Example 5 Require <![CDATA[Gsmg / m 2 ]]> 450 456 446 443 468 450+-45 Thicknessmm 0.495 0.494 0.478 0.491 0.496 0.5+-0.05 hardness 85 81 80 78 87 85+-5 TMD(Mpa) 22.1 22 20.8 19.7 21 >10 T-CD(Mpa) 17.1 17 13.0 13.2 18.9 >10 Elongation-MD% 443 535 556 535 216 >200 Elongation-CD% 677 762 989 939 228 >200

[0063] Table 2:

[0064] Test method:

[0065] H18, 1200 laps, 72 rev, 500 g load, 100% suction power;

[0066] CS-10, 5000 laps, 72rev, negative 500g, suction power 100%;

[0067]

Claims

1. A highly wear-resistant TPO automotive interior carpet material, characterized in that: The raw materials of the high-wear-resistant TPO automobile interior carpet material are composed of 30-60 parts of CO-PP resin, 10-20 parts of PE resin, 5-30 parts of polyolefin elastomer, 5-20 parts of TPV, 5-10 parts of dynamically vulcanized thermoplastic silicone-based elastomer Si-TPV, 0-3 parts of high molecular weight polysiloxane masterbatch, 0.1-1.0 parts of antioxidant, and 0.1-1.0 parts of functional additives in proportion by mass.

2. The highly wear-resistant TPO automotive interior carpet material according to claim 1, characterized in that: The CO-PP resin has a melt index of 4-60 g / 10 min, a melting point of 145° C.-170° C., and a shore A hardness of 80-100.

3. The highly wear-resistant TPO automotive interior carpet material according to claim 2, characterized in that: The CO-PP resin is 7585 or 8285, and the melt index of the CO-PP resin is 30-60 g / 10 min@230°C.

4. The highly wear-resistant TPO automotive interior carpet material according to claim 1, characterized in that: The PE resin is linear low-density polyethylene with a melt index of 2-20 g / 10 min and a melting point of 104° C.-125° C.

5. The highly wear-resistant TPO automotive interior carpet material according to claim 4, characterized in that: The PE resin is 7042, and the melt index of the PE resin is 2-10 g / 10 min@190° C.

6. The highly wear-resistant TPO automotive interior carpet material according to claim 1, characterized in that: The polyolefin elastomer is one or more of an ethylene-butene copolymer elastomer, an ethylene-octene copolymer elastomer, and a propylene copolymer elastomer; the TPV is a dynamically vulcanized polyolefin TPV with a shore A hardness of 55-95 and a melting point of 145°C-170°C; the dynamically vulcanized thermoplastic silicone-based elastomer Si-TPV has a melt index of 4-50 g / 10 min and a shore A hardness of 50-90; the antioxidant is antioxidant 1010 and / or antioxidant 168, the functional additives are a compatibilizer and a masterbatch, and the high molecular weight polysiloxane masterbatch has a shore A hardness of 55-90, a melting point of 145°C-170°C, and a melt index of 2-3 g / 10 min.

7. The highly wear-resistant TPO automotive interior carpet material according to claim 6, characterized in that: The mass ratio of the antioxidant 1010 to the antioxidant 168 is 2:1, the mass ratio of the compatibilizer to the masterbatch is 1:1; and the high molecular weight polysiloxane masterbatch is a high molecular weight silicone masterbatch.

8. The highly wear-resistant TPO automotive interior carpet material according to claim 7, characterized in that: The compatibilizer is palmitic acid, and the masterbatch is PE base carbon black.

9. A method for preparing the highly wear-resistant TPO automotive interior carpet material according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Weigh polyolefin elastomer, CO-PP resin, PE resin, TPV, dynamically vulcanized thermoplastic silicone elastomer Si-TPV, high molecular weight silicone masterbatch, color masterbatch, compatibilizer, antioxidant 1010 and antioxidant 168 according to the mass ratio; Step 2: The materials weighed in the first step were placed in a stirring mixer and stirred for 10 minutes. After uniform mixing, the materials were added to a twin-screw extruder for extrusion and granulation. The stirring rate in the stirring mixer was 60 rpm. The process parameters of the twin-screw extruder were as follows: screw diameter: 25 mm, screw aspect ratio: 48:1, screw temperature: zone 1: 160°C, zone 2: 170°C, zone 3: 170°C, zone 4: 175°C, zone 5: 175°C, zone 6: 175°C, zone 7: 170°C, zone 8: 170°C. The third step is cast film pressing: the particles after extrusion granulation are pressed into sheets with a thickness of 0.5-4 mm on a cast film pressing machine through single-layer extrusion or co-extrusion.

10. The method for preparing a highly wear-resistant TPO automotive interior carpet material according to claim 9, characterized in that: In the first step, 930-2000 g of polyolefin elastomer, 1500-2500 g of CO-PP resin, 930 g of PE resin, 1250 g of TPV, 250 g of dynamically vulcanized thermoplastic silicone elastomer Si-TPV, 50 g of palmitic acid, 20 g of masterbatch PE, and 50 g of antioxidant are weighed, wherein the mass ratio of antioxidant 1010: antioxidant 168 is 2:1.

Images