Spraying-free plastic and preparation method thereof

Abstract

The invention discloses a spraying-free plastic and a preparation method thereof, and relates to the field of spraying-free plastics, and the spraying-free plastic comprises 85 parts of resin, 5 parts of metal powder, 3 parts of pearl powder, 0.5 part of a dispersant, 0.5 part of a plasticizer, 1 part of a stabilizer, 0.5 part of a flame retardant, 5 parts of a dye, 2 parts of a filler, 2 parts of a reinforcing agent, 0.5 part of a lubricant, 1 part of a foaming agent, 1 part of a cross-linking agent, and 1 part of an antistatic agent. Compared with conventional spraying-free plastic, the spraying-free plastic has the advantages that spraying is not needed when the material is used in the later period, one-time injection molding is achieved, the flow-line-free and gorgeous flickering effect is achieved, meanwhile, the appropriate heating temperature and extrusion pressure are controlled in the production process, and it is avoided that flow lines are generated on the surface of an injection molding part, and attractiveness is affected.

Description

Technical Field

[0001] The invention relates to the technical field of spray-free plastics, and in particular to a spray-free plastic and a preparation method thereof. Background Art

[0002] Spray-free plastic is an innovative plastic material. Its characteristic is that special pearlescent powder, pigment, etc. are added to the plastic raw materials, and plastic particles that can be directly injection molded are produced through designed formula and technical modification. This material does not require traditional spraying technology and can achieve a variety of appearance effects, such as pearlescent, colorful, plush, metallic color, etc.

[0003] In the prior art, the composition of spray-free plastics is changed compared to traditional plastics, which causes flow lines to easily appear on the surface of the injection molded parts during injection molding, affecting the appearance of the finished products. Therefore, a spray-free plastic and a preparation method thereof are needed to meet people's needs. Summary of the invention

[0004] The purpose of the present invention is to provide a spray-free plastic and a preparation method thereof, so as to solve the problem that the composition of the spray-free plastic proposed in the above background technology is changed compared with traditional plastics, resulting in flow lines on the surface of the injection molded parts during injection molding, affecting the appearance of the finished product.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a spray-free plastic and a preparation method thereof, wherein the raw materials are as follows in terms of weight components: 85 parts of resin, 5 parts of metal powder, 3 parts of pearlescent powder, 0.5 parts of dispersant, 0.5 parts of plasticizer, 1 part of stabilizer, 0.5 parts of flame retardant, 5 parts of dye, 2 parts of filler, 2 parts of reinforcing agent, 0.5 parts of lubricant, 1 part of foaming agent, 1 part of cross-linking agent, and 1 part of antistatic agent.

[0006] Preferably, the dispersant is one of pentaerythritol stearic acid, silicone additives and dendritic polyamide additives or a mixture of several of them in any proportion, and the plasticizer is one of phthalate esters and fatty acid ester additives or a mixture of several of them in any proportion.

[0007] Preferably, the stabilizer is one of a lead salt stabilizer, a barium-cadmium stabilizer, a calcium-zinc stabilizer, and an organic tin stabilizer, or a mixture of several of them in any proportion.

[0008] Preferably, the flame retardant is one of a halogen flame retardant, a phosphorus flame retardant and a nitrogen flame retardant, or a mixture of several of them in any proportion.

[0009] Preferably, the filler is one of calcium carbonate, talc, clay, mica, calcium silicate, or a mixture of several of them in any proportion.

[0010] Preferably, the reinforcing agent is one of glass fiber, carbon fiber, aramid fiber, or a mixture of several of them in any proportion, and the lubricant is one of stearic acid and its salts, paraffin, or a mixture of several of them in any proportion.

[0011] Preferably, the foaming agent is one of butane, pentane, carbon dioxide, and nitrogen, or a mixture of several of them in any proportion.

[0012] Preferably, the cross-linking agent is one of epoxy compounds, allyl carbamate, epoxy resin, polyvinyl alcohol, and organic peroxide, or a mixture of several of them in any proportion.

[0013] Preferably, the antistatic agent is one of polyethylene glycol ester antistatic agents, ether antistatic agents, polyol fatty acid ester antistatic agents, quaternary ammonium salt antistatic agents, or a mixture of several of them in any proportion.

[0014] A method for preparing spray-free plastic, the specific steps are as follows:

[0015] Step 1:

[0016] According to weight percentage, 85 parts of resin, 0.5 parts of dispersant, 0.5 parts of plasticizer, 1 part of stabilizer, 0.5 parts of flame retardant, 2 parts of filler, 2 parts of reinforcing agent, 0.5 parts of lubricant, 1 part of foaming agent, 1 part of cross-linking agent and 1 part of antistatic agent are added into a high-speed mixer and mixed at room temperature for 10 minutes at a mixer speed of 500 revolutions per minute to obtain a substrate.

[0017] Step 2:

[0018] Add 3 parts of pearl powder, 0.5 parts of dispersant and 5 parts of dye into a high-speed mixer and stir at 500 revolutions per minute for 5 minutes until the base has a glossy appearance.

[0019] Step 3:

[0020] The generated substrate is added to the extruder, and is melted, extruded and granulated by the extruder to obtain spray-free plastic particles. The temperature of zone 1 of the extruder is 120 degrees Celsius, the temperature of zone 2 is 140 degrees Celsius, the temperature of zone 3 is 160 degrees Celsius, the temperature of zone 4 is 180 degrees Celsius, the temperature of zone 5 is 200 degrees Celsius, the temperature of zone 6 is 220 degrees Celsius, the temperature of the die head is 220 degrees Celsius, the speed of the twin-screw extruder is 200 revolutions per minute, and the extrusion pressure of the extruder needs to be controlled at 40MPa.

[0021] The beneficial effects of the present invention are:

[0022] In the present invention, compared with conventional spray-free plastics, the material does not need to be sprayed in later use and can be injection molded in one time, thereby achieving a flow-free and brilliant sparkling effect. At the same time, the appropriate heating temperature and extrusion pressure are controlled during the production process to avoid flow lines on the surface of the injection molded parts that affect the appearance.

[0023] In the present invention, the plasticizer increases the softness and processability of the plastic, improves the fluidity of the resin during molding, and increases the flexibility of the plastic part; the stabilizer reduces the quality variation and performance degradation of the resin caused by external factors such as heat, light, oxygen and mold, improves the heat resistance, light resistance and oxidation resistance of the plastic, and extends its service life; the flame retardant improves the flame retardant performance of the plastic, prevents it from burning rapidly in a fire, reduces the burning speed and the flame spread speed, and reduces the hazards of fire.

[0024] In the present invention, fillers are used to reduce costs, improve plastic properties, and expand the scope of use. Fillers can increase the volume of plastics, reduce the amount of resin used, and may improve certain physical properties such as hardness, wear resistance, etc., reinforcing agents can improve the mechanical strength of thermoplastics, such as tensile strength and bending strength, etc., lubricants can reduce friction and resistance of plastics during processing, improve processing efficiency, prevent mold sticking and melt fracture, antistatic agents can prevent plastics from generating static electricity due to friction during processing and use, and avoid hazards caused by static electricity accumulation, such as adsorption of dust and electric shock, and crosslinking agents can cause crosslinking of resin macromolecular chains when heated to form a hard and stable body-shaped network structure, thereby improving the hardness, heat resistance and solvent resistance of plastics. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of a spray-free plastic and a preparation method thereof proposed by the present invention; DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Embodiment 1,

[0028] Reference Figure 1 , a spray-free plastic and its preparation method, 85 parts of resin, 5 parts of metal powder, 3 parts of pearl powder, 0.5 parts of dispersant, 0.5 parts of plasticizer, 1 part of stabilizer, 0.5 parts of flame retardant, 5 parts of dye, 2 parts of filler, 2 parts of reinforcing agent, 0.5 parts of lubricant, 1 part of foaming agent, 1 part of cross-linking agent, and 1 part of antistatic agent.

[0029] Furthermore, the dispersant is one of pentaerythritol stearic acid, silicone additives and dendritic polyamide additives or a mixture of several of them in any proportion, and the plasticizer is one of phthalate esters and fatty acid ester additives or a mixture of several of them in any proportion.

[0030] Furthermore, the stabilizer is one of a lead salt stabilizer, a barium-cadmium stabilizer, a calcium-zinc stabilizer, and an organic tin stabilizer, or a mixture of several of them in any proportion.

[0031] Furthermore, the flame retardant is one of halogen flame retardants, phosphorus flame retardants and nitrogen flame retardants, or a mixture of several of them in any proportion.

[0032] Furthermore, the filler is one of calcium carbonate, talc, clay, mica, calcium silicate, or a mixture of several of them in any proportion.

[0033] Furthermore, the reinforcing agent is one of glass fiber, carbon fiber, aramid fiber or a mixture of several of them in any proportion, and the lubricant is one of stearic acid and its salts, paraffin or a mixture of several of them in any proportion.

[0034] Furthermore, the foaming agent is one of butane, pentane, carbon dioxide, and nitrogen, or a mixture of several of them in any proportion.

[0035] Furthermore, the cross-linking agent is one of epoxy compounds, allyl carbamate, epoxy resin, polyvinyl alcohol, and organic peroxide, or a mixture of several of them in any proportion.

[0036] Furthermore, the antistatic agent is one of polyethylene glycol ester antistatic agents, ether antistatic agents, polyol fatty acid ester antistatic agents, quaternary ammonium salt antistatic agents, or a mixture of several of them in any proportion.

[0037] A method for preparing spray-free plastic, the specific steps are as follows:

[0038] Step 1:

[0039] According to weight percentage, 85 parts of resin, 0.5 parts of dispersant, 0.5 parts of plasticizer, 1 part of stabilizer, 0.5 parts of flame retardant, 2 parts of filler, 2 parts of reinforcing agent, 0.5 parts of lubricant, 1 part of foaming agent, 1 part of cross-linking agent and 1 part of antistatic agent are added into a high-speed mixer and mixed at room temperature for 10 minutes at a mixer speed of 500 revolutions per minute to obtain a substrate.

[0040] Step 2:

[0041] Add 3 parts of pearl powder, 0.5 parts of dispersant and 5 parts of dye into a high-speed mixer and stir at 500 revolutions per minute for 5 minutes until the base has a glossy appearance.

[0042] Step 3:

[0043] The generated substrate is added to the extruder, and is melted, extruded and granulated by the extruder to obtain spray-free plastic particles. The temperature of zone 1 of the extruder is 120 degrees Celsius, the temperature of zone 2 is 140 degrees Celsius, the temperature of zone 3 is 160 degrees Celsius, the temperature of zone 4 is 180 degrees Celsius, the temperature of zone 5 is 200 degrees Celsius, the temperature of zone 6 is 220 degrees Celsius, the temperature of the die head is 220 degrees Celsius, the speed of the twin-screw extruder is 200 revolutions per minute, and the extrusion pressure of the extruder needs to be controlled at 40MPa.

[0044] Embodiment 2,

[0045] On the basis of Example 1, in order to further reduce the production cost and improve the environmental performance of the plastic product, a plant filler is used.

[0046] A spray-free plastic and a preparation method thereof, comprising 85 parts of resin, 5 parts of metal powder, 3 parts of pearlescent powder, 0.5 parts of dispersant, 0.5 parts of plasticizer, 1 part of stabilizer, 0.5 parts of flame retardant, 5 parts of dye, 2 parts of filler, 2 parts of reinforcing agent, 0.5 parts of lubricant, 1 part of foaming agent, 1 part of cross-linking agent and 1 part of antistatic agent.

[0047] Furthermore, the dispersant is one of pentaerythritol stearic acid, silicone additives and dendritic polyamide additives or a mixture of several of them in any proportion, and the plasticizer is one of phthalate esters and fatty acid ester additives or a mixture of several of them in any proportion.

[0048] Furthermore, the stabilizer is one of a lead salt stabilizer, a barium-cadmium stabilizer, a calcium-zinc stabilizer, and an organic tin stabilizer, or a mixture of several of them in any proportion.

[0049] Furthermore, the flame retardant is one of halogen flame retardants, phosphorus flame retardants and nitrogen flame retardants, or a mixture of several of them in any proportion.

[0050] Furthermore, the filler is one of wood powder, cotton scraps, peanut shell powder, walnut shell powder, or a mixture of several of them in any proportion.

[0051] Furthermore, the reinforcing agent is one of glass fiber, carbon fiber, aramid fiber or a mixture of several of them in any proportion, and the lubricant is one of stearic acid and its salts, paraffin or a mixture of several of them in any proportion.

[0052] Furthermore, the foaming agent is one of butane, pentane, carbon dioxide, and nitrogen, or a mixture of several of them in any proportion.

[0053] Furthermore, the cross-linking agent is one of epoxy compounds, allyl carbamate, epoxy resin, polyvinyl alcohol, and organic peroxide, or a mixture of several of them in any proportion.

[0054] Furthermore, the antistatic agent is one of polyethylene glycol ester antistatic agents, ether antistatic agents, polyol fatty acid ester antistatic agents, quaternary ammonium salt antistatic agents, or a mixture of several of them in any proportion.

[0055] A method for preparing spray-free plastic, the specific steps are as follows:

[0056] Step 1:

[0057] According to weight percentage, 85 parts of resin, 0.5 parts of dispersant, 0.5 parts of plasticizer, 1 part of stabilizer, 0.5 parts of flame retardant, 2 parts of filler, 2 parts of reinforcing agent, 0.5 parts of lubricant, 1 part of foaming agent, 1 part of cross-linking agent and 1 part of antistatic agent are added into a high-speed mixer and mixed at room temperature for 10 minutes at a mixer speed of 500 revolutions per minute to obtain a substrate.

[0058] Step 2:

[0059] Add 3 parts of pearl powder, 0.5 parts of dispersant and 5 parts of dye into a high-speed mixer and stir at 500 revolutions per minute for 5 minutes until the base has a glossy appearance.

[0060] Step 3:

[0061] The generated substrate is added to the extruder, and is melted, extruded and granulated by the extruder to obtain spray-free plastic particles. The temperature of zone 1 of the extruder is 120 degrees Celsius, the temperature of zone 2 is 140 degrees Celsius, the temperature of zone 3 is 160 degrees Celsius, the temperature of zone 4 is 180 degrees Celsius, the temperature of zone 5 is 200 degrees Celsius, the temperature of zone 6 is 220 degrees Celsius, the temperature of the die head is 220 degrees Celsius, the speed of the twin-screw extruder is 200 revolutions per minute, and the extrusion pressure of the extruder needs to be controlled at 40MPa.

[0062] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A spray-free plastic, characterized in that: The raw materials are as follows by weight: 85 parts of resin, 5 parts of metal powder, 3 parts of pearl powder, 0.5 parts of dispersant, 0.5 parts of plasticizer, 1 part of stabilizer, 0.5 parts of flame retardant, 5 parts of dye, 2 parts of filler, 2 parts of reinforcing agent, 0.5 parts of lubricant, 1 part of foaming agent, 1 part of cross-linking agent, and 1 part of antistatic agent.

2. The spray-free plastic according to claim 1, characterized in that: The dispersant is one of pentaerythritol stearic acid, silicone additives and dendritic polyamide additives or a mixture of several of them in any proportion; the plasticizer is one of phthalate esters and fatty acid ester additives or a mixture of several of them in any proportion.

3. The spray-free plastic according to claim 1, characterized in that: The stabilizer is one of lead salt stabilizers, barium cadmium stabilizers, calcium zinc stabilizers, and organic tin stabilizers, or a mixture of several of them in any proportion.

4. The spray-free plastic according to claim 1, characterized in that: The flame retardant is one of halogen flame retardants, phosphorus flame retardants and nitrogen flame retardants, or a mixture of several of them in any proportion.

5. The spray-free plastic according to claim 1, characterized in that: The filler is one of calcium carbonate, talcum powder, clay, mica, calcium silicate or a mixture of several of them in any proportion.

6. The spray-free plastic according to claim 1, characterized in that: The reinforcing agent is one of glass fiber, carbon fiber, aramid fiber or a mixture of several of them in any proportion; the lubricant is one of stearic acid and its salts, paraffin or a mixture of several of them in any proportion.

7. The spray-free plastic according to claim 1, characterized in that: The foaming agent is one of butane, pentane, carbon dioxide and nitrogen or a mixture of several of them in any proportion.

8. The spray-free plastic according to claim 1, characterized in that: The crosslinking agent is one of epoxy compounds, allyl carbamate, epoxy resin, polyvinyl alcohol, and organic peroxide, or a mixture of several of them in any proportion.

9. The spray-free plastic according to claim 1, characterized in that: The antistatic agent is one of polyethylene glycol ester antistatic agents, ether antistatic agents, polyol fatty acid ester antistatic agents, quaternary ammonium salt antistatic agents, or a mixture of several of them in any proportion.

10. The method for preparing a spray-free plastic according to claim 1, wherein the specific steps are as follows: Step 1: According to weight percentage, 85 parts of resin, 0.5 parts of dispersant, 0.5 parts of plasticizer, 1 part of stabilizer, 0.5 parts of flame retardant, 2 parts of filler, 2 parts of reinforcing agent, 0.5 parts of lubricant, 1 part of foaming agent, 1 part of cross-linking agent and 1 part of antistatic agent are added into a high-speed mixer and mixed at room temperature for 10 minutes at a mixer speed of 500 revolutions per minute to obtain a substrate. Step 2: Add 3 parts of pearl powder, 0.5 parts of dispersant and 5 parts of dye into a high-speed mixer and stir at 500 revolutions per minute for 5 minutes until the base has a glossy appearance. Step 3: The generated substrate is added to the extruder, and is melted, extruded and granulated by the extruder to obtain spray-free plastic particles. The temperature of zone 1 of the extruder is 120 degrees Celsius, the temperature of zone 2 is 140 degrees Celsius, the temperature of zone 3 is 160 degrees Celsius, the temperature of zone 4 is 180 degrees Celsius, the temperature of zone 5 is 200 degrees Celsius, the temperature of zone 6 is 220 degrees Celsius, the temperature of the die head is 220 degrees Celsius, the speed of the twin-screw extruder is 200 revolutions per minute, and the extrusion pressure of the extruder needs to be controlled at 40MPa.

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