Nylon 6 red phosphorus flame-retardant reinforced black plastic particle and preparation method thereof

Abstract

The invention discloses nylon 6 red phosphorus flame-retardant reinforced black plastic particles and a manufacturing method thereof, and the technical scheme is characterized in that the nylon 6 red phosphorus flame-retardant reinforced black plastic particles comprise the following components in percentage by weight: 60-65% of nylon 6, 10-15% of a flame retardant, 0.3-0.8% of a flowable agent, 0.1-0.4% of an antioxidant, 0.1-0.3% of a nucleating agent, 0.3-0.8% of a release agent, 2-3% of black master batch and 20-25% of glass fiber. The material has the advantages that excess materials and recycled materials can be utilized conveniently, and the flame retardance is good.

Description

Technical Field

[0001] The invention relates to the field of plastic particles, and more specifically to nylon 6 red phosphorus flame retardant reinforced black plastic particles and a preparation method thereof. Background Art

[0002] Plastic particles refer to granular plastics, which are generally divided into more than 200 types and subdivided into thousands of types. Common plastic particles include general-purpose plastics, engineering plastics, and special plastics. At present, some plastic particles do not have flame retardants added inside, so the flame retardancy of plastic particles is poor. During the production of plastic particles, a certain amount of particle waste will be generated, and the waste needs to be reused. Some manufacturers will sell the plastic particle waste, but the sale cannot maximize the value of the waste and waste. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a nylon 6 red phosphorus flame retardant reinforced black plastic particle and a preparation method thereof to solve the problems in the background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a method for preparing nylon 6 red phosphorus flame retardant reinforced black plastic particles, comprising the following steps: Step 1: Mix high viscosity nylon 6 and nylon 6 crushed material; Step 2: Add flame retardant, flow agent, antioxidant, nucleating agent, release agent and black masterbatch into the mixer in proportion, with a stirring speed of 800-1200 rpm and a stirring time of 1-3 minutes; Step 3: Use a twin-screw low-torque extruder to strand and pelletize the mixed material. The temperature ranges are: zone 1 210-220℃; zone 2 240-250℃; zone 3 240-250℃; zone 4 230-240℃; zone 5 230-240℃; zone 6 230-240℃; zone 7 220-230℃; zone 8 205-215℃; zone 9 220-230℃; zone 10 230-240℃ die head 240-250℃; the main engine speed is controlled at 410 rpm, the feed is at 22-24 rpm, and the current is controlled at 80A; Step 4: Add long glass fiber from the glass fiber port on the twin-screw low-torque extruder; turn on the vacuum pump to evacuate the air, and the vacuum pump has a suction force of 0.08Mpa; Step 5: During the drawing process, use a muffle furnace to regularly test the ash content of the particles to control the glass fiber content error within 0.5%; Step 6: During the drawing process, the particles are regularly tested for flame retardancy using the horizontal combustion method to ensure that the product has a flame retardancy level of V1. Step 7: Pump the prepared plastic particles into a homogenization barrel at a homogenization temperature of 70-85 degrees Celsius for 20-30 minutes in batches.

[0005] The present invention is further configured as: a nylon 6 red phosphorus flame retardant reinforced black plastic particle, which is composed of the following components in weight percentage: nylon 6: 60-65%, flame retardant 10-15%, flow agent 0.3-0.8%, antioxidant 0.1-0.4%, nucleating agent 0.1-0.3%, release agent 0.3-0.8%, black masterbatch 2-3%, glass fiber: 20-25%.

[0006] The present invention is further configured as follows: the flame retardant is red phosphorus; the flow agent is CBT resin; the antioxidant is bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite; the nucleating agent is 2,2,-methylenebis(4,6-di-tert-butylphenyl)sodium phosphate; and the release agent is a functional group long-chain amide.

[0007] In summary, the present invention has the following beneficial effects: nylon 6 is the residual material after crushing, and new plastic particles are produced by mixing it with high-viscosity nylon 6, thereby increasing the value of the residual material and waste; the red phosphorus added in the production process has good flame retardancy, thereby making the plastic particles highly flame retardant. DETAILED DESCRIPTION

[0008] The invention discloses nylon 6 red phosphorus flame retardant reinforced black plastic particles and a preparation method thereof, which have the effects of being convenient for utilizing surplus materials and recycled materials and having good flame retardancy. Embodiment 1

[0009] A method for preparing nylon 6 red phosphorus flame retardant reinforced black plastic particles comprises the following steps: Step 1: Mix high viscosity nylon 6 and nylon 6 crushed material; Step 2: Add flame retardant, flow agent, antioxidant, nucleating agent, release agent and black masterbatch into the mixer in proportion, with a stirring speed of 1200 rpm and a stirring time of 3 minutes; Step 3: Use a twin-screw low-torque extruder to strand and pelletize the mixed material. The temperature ranges are: zone 1 210°C; zone 2 242°C; zone 3 244°C; zone 4 232°C; zone 5 235°C; zone 6 233°C; zone 7 225°C; zone 8 207°C; zone 9 221°C; zone 10 230°C and die head 240°C; the main engine speed is controlled at 410 rpm, the feed at 24 rpm, and the current is controlled at 80A; Step 4: Add long glass fiber from the glass fiber port on the twin-screw low-torque extruder; turn on the vacuum pump to evacuate the air, and the vacuum pump has a suction force of 0.08Mpa; Step 5: During the drawing process, use a muffle furnace to regularly test the ash content of the particles to control the glass fiber content error within 0.5%; Step 6: During the drawing process, the particles are regularly tested for flame retardancy using the horizontal combustion method to ensure that the product has a flame retardancy level of V1. Step 7: Pump the prepared plastic particles into a homogenization barrel at a homogenization temperature of 75 degrees Celsius for 22 minutes in batches.

[0010] A nylon 6 red phosphorus flame retardant reinforced black plastic particle, which is composed of the following components in percentage by weight: nylon 6: 60%, flame retardant 12%, flow agent 0.8%, antioxidant 0.2%, nucleating agent 0.3%, release agent 0.7%, black masterbatch 3%, glass fiber: 23%.

[0011] The flame retardant is red phosphorus; the flow agent is CBT resin; the antioxidant is bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite; the nucleating agent is 2,2,-methylenebis(4.6-di-tert-butylphenyl)sodium phosphate; and the release agent is a functional group long-chain amide. Embodiment 2

[0012] A method for preparing nylon 6 red phosphorus flame retardant reinforced black plastic particles comprises the following steps: Step 1: Mix high viscosity nylon 6 and nylon 6 crushed material; Step 2: Add flame retardant, flow agent, antioxidant, nucleating agent, release agent and black masterbatch into the mixer in proportion, with a stirring speed of 1000 rpm and a stirring time of 2 minutes; Step 3: Use a twin-screw low-torque extruder to strand and pelletize the mixed material. The temperature ranges are: zone 1 213°C; zone 2 240°C; zone 3 240°C; zone 4 235°C; zone 5 231°C; zone 6 232°C; zone 7 227°C; zone 8 211°C; zone 9 228°C; zone 10 237°C; die head 242°C; main engine speed is controlled at 410 rpm, feed at 24 rpm, and current at 80A; Step 4: Add long glass fiber from the glass fiber port on the twin-screw low-torque extruder; turn on the vacuum pump to evacuate the air, and the vacuum pump has a suction force of 0.08Mpa; Step 5: During the drawing process, use a muffle furnace to regularly test the ash content of the particles to control the glass fiber content error within 0.5%; Step 6: During the drawing process, the particles are regularly tested for flame retardancy using the horizontal combustion method to ensure that the product has a flame retardancy level of V1. Step 7: Pump the prepared plastic particles into a homogenization barrel at a homogenization temperature of 70 degrees Celsius for 30 minutes in batches.

[0013] A nylon 6 red phosphorus flame retardant reinforced black plastic particle, which is composed of the following components in percentage by weight: nylon 6: 62%, flame retardant 10%, flow agent 0.6%, antioxidant 0.3%, nucleating agent 0.3%, release agent 0.8%, black masterbatch 1%, glass fiber: 25%.

[0014] The flame retardant is red phosphorus; the flow agent is CBT resin; the antioxidant is bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite; the nucleating agent is 2,2,-methylenebis(4.6-di-tert-butylphenyl)sodium phosphate; and the release agent is a functional group long-chain amide. Embodiment 3

[0015] A method for preparing nylon 6 red phosphorus flame retardant reinforced black plastic particles comprises the following steps: Step 1: Mix high viscosity nylon 6 and nylon 6 crushed material; Step 2: Add flame retardant, flow agent, antioxidant, nucleating agent, release agent and black masterbatch into the mixer in proportion, with a stirring speed of 1050 rpm and a stirring time of 2 minutes; Step 3: The mixed material is subjected to stranding and pelletizing by a twin-screw low-torque extruder, and the temperature ranges are: zone 1 218°C; zone 2 242°C; zone 3 242°C; zone 4 238°C; zone 5 235°C; zone 6 235°C; zone 7 222°C; zone 8 208°C; zone 9 225°C; zone 10 235°C and die head 244°C; the main engine speed is controlled at 410 rpm, the feed at 23 rpm, and the current is controlled at 80A; Step 4: Add long glass fiber from the glass fiber port on the twin-screw low-torque extruder; turn on the vacuum pump to evacuate the air, and the vacuum pump has a suction force of 0.08Mpa; Step 5: During the drawing process, use a muffle furnace to regularly test the ash content of the particles to control the glass fiber content error within 0.5%; Step 6: During the drawing process, the particles are regularly tested for flame retardancy using the horizontal combustion method to ensure that the product has a flame retardancy level of V1. Step 7: Pump the prepared plastic particles into a homogenization barrel at a homogenization temperature of 75 degrees Celsius for 20 minutes in batches.

[0016] A nylon 6 red phosphorus flame retardant reinforced black plastic particle, which is composed of the following components in percentage by weight: nylon 6: 63%, flame retardant 10%, flow agent 0.7%, antioxidant 0.3%, nucleating agent 0.3%, release agent 0.7%, black masterbatch 3%, glass fiber: 22%.

[0017] The flame retardant is red phosphorus; the flow agent is CBT resin; the antioxidant is bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite; the nucleating agent is 2,2,-methylenebis(4.6-di-tert-butylphenyl)sodium phosphate; and the release agent is a functional group long-chain amide. Embodiment 4

[0018] A method for preparing nylon 6 red phosphorus flame retardant reinforced black plastic particles comprises the following steps: Step 1: Mix high viscosity nylon 6 and nylon 6 crushed material; Step 2: Add flame retardant, flow agent, antioxidant, nucleating agent, release agent and black masterbatch into the mixer in proportion, with a stirring speed of 900 rpm and a stirring time of 2 minutes; Step 3: Use a twin-screw low-torque extruder to strand and pelletize the mixed material. The temperature ranges are: zone 1 220°C; zone 2 247°C; zone 3 243°C; zone 4 235°C; zone 5 237°C; zone 6 238°C; zone 7 225°C; zone 8 209°C; zone 9 227°C; zone 10 233°C and die head 247°C; the main engine speed is controlled at 410 rpm, the feed at 24 rpm, and the current is controlled at 80A; Step 4: Add long glass fiber from the glass fiber port on the twin-screw low-torque extruder; turn on the vacuum pump to evacuate the air, and the vacuum pump has a suction force of 0.08Mpa; Step 5: During the drawing process, use a muffle furnace to regularly test the ash content of the particles to control the glass fiber content error within 0.5%; Step 6: During the drawing process, the particles are regularly tested for flame retardancy using the horizontal combustion method to ensure that the product has a flame retardancy level of V1. Step 7: Pump the prepared plastic particles into a homogenization barrel at a homogenization temperature of 78 degrees Celsius for 25 minutes in batches.

[0019] A nylon 6 red phosphorus flame retardant reinforced black plastic particle, which is composed of the following components in percentage by weight: nylon 6: 62%, flame retardant: 13%, flow agent: 0.5%, antioxidant: 0.4%, nucleating agent: 0.3%, release agent: 0.8%, black masterbatch: 2%, and glass fiber: 21%.

[0020] The flame retardant is red phosphorus; the flow agent is CBT resin; the antioxidant is bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite; the nucleating agent is 2,2,-methylenebis(4.6-di-tert-butylphenyl)sodium phosphate; and the release agent is a functional group long-chain amide. Embodiment 5

[0021] A method for preparing nylon 6 red phosphorus flame retardant reinforced black plastic particles comprises the following steps: Step 1: Mix high viscosity nylon 6 and nylon 6 crushed material; Step 2: Add flame retardant, flow agent, antioxidant, nucleating agent, release agent and black masterbatch into the mixer in proportion, with a stirring speed of 850 rpm and a stirring time of 3 minutes; Step 3: Use a twin-screw low-torque extruder to strand and pelletize the mixed material. The temperature ranges are: zone 1 215°C; zone 2 243°C; zone 3 244°C; zone 4 235°C; zone 5 238°C; zone 6 237°C; zone 7 226°C; zone 8 215°C; zone 9 228°C; zone 10 235°C and die head 247°C; the main engine speed is controlled at 410 rpm, the feed is at 24 rpm, and the current is controlled at 80A; Step 4: Add long glass fiber from the glass fiber port on the twin-screw low-torque extruder; turn on the vacuum pump to evacuate the air, and the vacuum pump has a suction force of 0.08Mpa; Step 5: During the drawing process, use a muffle furnace to regularly test the ash content of the particles to control the glass fiber content error within 0.5%; Step 6: During the drawing process, the particles are regularly tested for flame retardancy using the horizontal combustion method to ensure that the product has a flame retardancy level of V1. Step 7: Pump the prepared plastic particles into a homogenization barrel at a homogenization temperature of 80 degrees Celsius for 30 minutes in batches.

[0022] A nylon 6 red phosphorus flame retardant reinforced black plastic particle, which is composed of the following components in percentage by weight: nylon 6: 63%, flame retardant: 13%, flow agent: 0.8%, antioxidant: 0.3%, nucleating agent: 0.2%, release agent: 0.7%, black masterbatch: 2%, glass fiber: 20%.

[0023] The flame retardant is red phosphorus; the flow agent is CBT resin; the antioxidant is bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite; the nucleating agent is 2,2,-methylenebis(4.6-di-tert-butylphenyl)sodium phosphate; and the release agent is a functional group long-chain amide.

[0024] Performance test table of each embodiment: Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Flame retardant grade V1 V1 V1 V1 V1 The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing nylon 6 red phosphorus flame retardant reinforced black plastic particles, characterized in that: The following steps are involved: Step 1: Mix high viscosity nylon 6 and nylon 6 crushed material; Step 2: Add flame retardant, flow agent, antioxidant, nucleating agent, release agent and black masterbatch into the mixer in proportion, with a stirring speed of 800-1200 rpm and a stirring time of 1-3 minutes; Step 3: Use a twin-screw low-torque extruder to strand and pelletize the mixed material. The temperature ranges are: zone 1 210-220℃; zone 2 240-250℃; zone 3 240-250℃; zone 4 230-240℃; zone 5 230-240℃; zone 6 230-240℃; zone 7 220-230℃; zone 8 205-215℃; zone 9 220-230℃; zone 10 230-240℃ die head 240-250℃; the main engine speed is controlled at 410 rpm, the feed is at 22-24 rpm, and the current is controlled at 80A; Step 4: Add long glass fiber from the glass fiber port on the twin-screw low-torque extruder; turn on the vacuum pump to evacuate the air, and the vacuum pump has a suction force of 0.08Mpa; Step 5: During the drawing process, use a muffle furnace to regularly test the ash content of the particles to control the glass fiber content error within 0.5%; Step 6: During the drawing process, the particles are regularly tested for flame retardancy using the horizontal combustion method to ensure that the product has a flame retardancy level of V1. Step 7: Pump the prepared plastic particles into a homogenization barrel at a homogenization temperature of 70-85 degrees Celsius for 20-30 minutes in batches.

2. A nylon 6 red phosphorus flame retardant reinforced black plastic particle, characterized in that: The composition is composed of the following components in weight percentage: nylon 6: 60-65%, flame retardant 10-15%, flow agent 0.3-0.8%, antioxidant 0.1-0.4%, nucleating agent 0.1-0.3%, release agent 0.3-0.8%, black masterbatch 2-3%, glass fiber: 20-25%.

3. The nylon 6 red phosphorus flame retardant reinforced black plastic particles according to claim 2, characterized in that: The flame retardant is red phosphorus; the flow agent is CBT resin; the antioxidant is bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite; the nucleating agent is 2,2,-methylenebis(4.6-di-tert-butylphenyl)sodium phosphate; and the release agent is a functional group long-chain amide.