PP bio-based wear-resistant layer and preparation method thereof

Abstract

The invention discloses a PP bio-based wear-resistant layer and a preparation method thereof, and belongs to the technical field of plastic floors. The wear-resistant layer is composed of 80-120 parts of polypropylene, 5-20 parts of palm oil, 1.0-6.0 parts of a transparent calcium-zinc stabilizer, 0.5-3.0 parts of ACR and 15-30 parts of a nitrogen-phosphorus flame retardant, the PP bio-based wear-resistant layer has excellent processability by adjusting the use amounts of the palm oil, the transparent calcium-zinc stabilizer, the ACR and the nitrogen-phosphorus flame retardant, and the wear resistance, high temperature resistance, environmental protection and other properties are greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic floors, and in particular relates to a PP bio-based wear-resistant layer and a preparation method thereof. Background Art

[0002] With the continuous development of the global construction industry and the increasing requirements of people for floor decoration, plastic flooring is increasingly used in commercial areas such as shopping malls, hotels, office buildings, etc. Due to its durability and easy cleaning, plastic flooring has a longer service life and lower maintenance costs in these places, so it is favored by owners and designers.

[0003] The main raw material of the wear-resistant layer on the surface of plastic floor is PVC resin powder, and PVC will produce toxic gas when burned, which poses a potential hazard to the environment and human health. Therefore, the use of PVC is subject to certain restrictions in applications where high fire resistance is required. Summary of the invention

[0004] In view of the problems existing in the prior art, one technical problem to be solved by the present invention is to provide a PP bio-based wear-resistant layer. Another technical problem to be solved by the present invention is to provide a method for preparing a PP bio-based wear-resistant layer. By reasonably proportioning the amounts of each component, the product has better wear resistance, high temperature resistance and weather resistance than the traditional PVC wear-resistant layer.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is as follows:

[0006] A PP bio-based wear-resistant layer is composed of the following components in parts by weight: 80-120 parts of polypropylene (PP resin filler, reducing cost, improving performance, and promoting degradation), 5-20 parts of palm oil, 1.0-6.0 parts of transparent calcium zinc stabilizer, 0.5-3.0 parts of ACR (acrylamide), and 15-30 parts of nitrogen-phosphorus flame retardant; preferably, the melting point of the palm oil is below 10°C.

[0007] The PP bio-based wear-resistant layer is composed of the following components in parts by weight: 80-120 parts of polypropylene, 6-15 parts of palm oil, 1.5-3 parts of transparent calcium zinc stabilizer, 0.8-2 parts of ACR, and 17-26 parts of nitrogen-phosphorus flame retardant.

[0008] The PP bio-based wear-resistant layer is composed of the following components in parts by weight: 120 parts of polypropylene, 10 parts of palm oil, 2 parts of transparent calcium zinc stabilizer, 1 part of ACR, and 20 parts of nitrogen-phosphorus flame retardant.

[0009] The method for preparing the above-mentioned PP bio-based wear-resistant layer comprises the following steps:

[0010] Step 1: Place PP resin, palm oil, transparent calcium zinc stabilizer, ACR and nitrogen phosphorus flame retardant into a high-speed mixer to mix them thoroughly and remove moisture from the materials to avoid bubbles in the subsequent finished products;

[0011] Step 2: The mixed material in step 1 is conveyed to a low mixer to prevent the sudden drop in temperature from causing moisture absorption, solidification and static electricity;

[0012] Step 3: The mixed material in step 2 is conveyed to an extrusion filter, the purpose of which is to melt and plasticize the mixed material into a uniform melt, realize the transition from a glassy state to a viscous flow state, continuously extrude through a screw, and convey it to an extrusion die;

[0013] Step 4: The extruded material in step 3 is sequentially passed through a die head, a traction roller, an embossing roller, a warming roller, a shaping roller, a cooling roller, a winder, and a cutting machine to obtain a PP bio-based wear-resistant layer.

[0014] In the method for preparing the PP bio-based wear-resistant layer, the temperature of the high mixer is set to 110-130° C., and the temperature of the low mixer is set to 50-70° C.

[0015] In the method for preparing the PP bio-based wear-resistant layer, the temperature of the extrusion filter is set at 210-230°C.

[0016] In the method for preparing the PP bio-based wear-resistant layer, the temperature of the extrusion die is set to: 190-210° C. for the first stage, 190-210° C. for the second stage, and 190-210° C. for the third stage; and the temperature of the die head is set to 190-210° C.

[0017] Beneficial effects: Compared with the existing technology, the advantages of the present invention include:

[0018] (1) By adjusting the dosage of palm oil, transparent calcium zinc stabilizer, ACR and nitrogen phosphorus flame retardant, the PP bio-based wear-resistant layer has excellent processing performance, greatly improving the wear resistance, high temperature resistance, environmental protection and other properties.

[0019] (2) Palm oil acts as a plasticizer, increasing the plasticity of the polymer, enhancing the mechanical properties, reducing the density of the PP material, and increasing the melt flow rate. Palm oil is inexpensive compared to other bio-based materials, is a renewable resource, and has good biodegradability. At the same time, it does not produce waste and by-products during the product production process, which also improves resource utilization efficiency.

[0020] (3) The PP bio-based wear-resistant layer has natural degradation (degradation cycle in the natural environment is 18-30 years), and has better wear resistance, high temperature resistance and weather resistance than the traditional PVC wear-resistant layer.

[0021] (4) The PP bio-based wear-resistant layer has a lower density than the PVC wear-resistant layer, which helps to reduce transportation costs and improve product competitiveness. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with specific embodiments.

[0023] Example 1

[0024] The formula includes 100 parts of PP resin, 10 parts of palm oil (melting point below 10°C), 2 parts of transparent calcium zinc stabilizer, 1 part of ACR, and 20 parts of nitrogen-phosphorus flame retardant.

[0025] Calendering process

[0026] Step 1: Mix PP resin, palm oil, transparent calcium zinc stabilizer, ACR, and nitrogen phosphorus flame retardant and send them into a high-speed mixer, and discharge the mixture when it reaches 120°C;

[0027] Step 2: Convey the mixed material from step 1 to a low mixer, and discharge the material when the mixture reaches 60°C;

[0028] Step 3: The mixed material from step 2 is conveyed to an extrusion filter (temperature setting 220±10°C), the mixed material is melted and plasticized into a uniform melt, and the mixture is transformed from a glassy state to a viscous flow state, and is continuously extruded and pressed by a screw to a three-stage extrusion mold (stage one (200±10°C), stage two (200±10°C), and stage three (200±10°C));

[0029] Step 4: The extruded material of step 3 is sequentially passed through a die head (temperature set at 200±10°C), a traction roller, an embossing roller, a warming roller, a shaping roller, a cooling roller, a winder, and a cutting machine to obtain a PP bio-based wear-resistant layer.

[0030] Example 2

[0031] The formula includes 80 parts of PP resin, 6 parts of palm oil (melting point below 10°C), 1.5 parts of transparent calcium zinc stabilizer, 0.8 parts of ACR, and 17 parts of nitrogen-phosphorus flame retardant.

[0032] Calendering process is the same as in Example 1

[0033] Example 3

[0034] The formula includes 120 parts of PP resin, 15 parts of palm oil (melting point below 10°C), 3 parts of transparent calcium zinc stabilizer, 2 parts of ACR, and 26 parts of nitrogen-phosphorus flame retardant.

[0035] Calendering process is the same as in Example 1

[0036] Table 1 Performance test results of PP bio-based wear-resistant layer prepared in Examples 1-3

[0037]

[0038] Table 2 Performance test results of conventional PVC wear-resistant layer

[0039]

[0040] By comparing different data of Examples 1-3 with conventional PVC wear-resistant layers, various performance parameters of finished products with different formulations were tested. The formulation of Example 1, in which the PP bio-based wear-resistant layer product has better performance, is superior to conventional PVC products on the market in terms of yellowing resistance, heating length change rate, and wear resistance; other formulations can also be adjusted according to the formulation to obtain applications with better cost performance.

Claims

1. A PP bio-based wear-resistant layer, characterized in that: The invention is composed of the following components in parts by weight: 80-120 parts of polypropylene, 5-20 parts of palm oil, 1.0-6.0 parts of transparent calcium zinc stabilizer, 0.5-3.0 parts of ACR and 15-30 parts of nitrogen-phosphorus flame retardant.

2. The PP bio-based wear-resistant layer according to claim 1, characterized in that: The invention is composed of the following components in parts by weight: 80-120 parts of polypropylene, 6-15 parts of palm oil, 1.5-3 parts of transparent calcium zinc stabilizer, 0.8-2 parts of ACR and 17-26 parts of nitrogen-phosphorus flame retardant.

3. The PP bio-based wear-resistant layer according to claim 1, characterized in that: The invention is composed of the following components in parts by weight: 120 parts of polypropylene, 10 parts of palm oil, 2 parts of transparent calcium zinc stabilizer, 1 part of ACR, and 20 parts of nitrogen phosphorus flame retardant.

4. The method for preparing the PP bio-based wear-resistant layer according to any one of claims 1 to 3, characterized in that: The following steps are involved: Step 1: Put PP resin, palm oil, transparent calcium zinc stabilizer, ACR and nitrogen phosphorus flame retardant into a high-speed mixer to mix them thoroughly and remove moisture from the materials; Step 2: conveying the mixed material in step 1 to a low mixer; Step 3: conveying the mixed material in step 2 to an extrusion filter; continuously extruding through a screw, and conveying to an extrusion die; Step 4: The extruded material in step 3 is sequentially passed through a die head, a traction roller, an embossing roller, a warming roller, a shaping roller, a cooling roller, a winder, and a cutting machine to obtain a PP bio-based wear-resistant layer.

5. The method for preparing the PP bio-based wear-resistant layer according to claim 4, characterized in that: The temperature of the high mixer is set to 110-130°C, and the temperature of the low mixer is set to 50-70°C.

6. The method for preparing a PP bio-based wear-resistant layer according to claim 4, characterized in that: The temperature of the extrusion filter is set at 210-230°C.

7. The method for preparing a PP bio-based wear-resistant layer according to claim 4, characterized in that: The temperature of the extrusion die is set to: 190-210°C for the first stage, 190-210°C for the second stage, and 190-210°C for the third stage; the temperature of the die head is set to 190-210°C.

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