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CN-122011563-A - High-tightness stacking plastic bucket and preparation method thereof

CN122011563ACN 122011563 ACN122011563 ACN 122011563ACN-122011563-A

Abstract

The invention discloses a high-tightness stacking plastic bucket and a preparation method thereof, belonging to the technical field of high polymer materials, wherein the high-tightness stacking plastic bucket comprises the steps of adding a compatilizer into an alpha-olefin ethylene copolymer for mixing, adding polyvinylidene chloride powder, nano montmorillonite and talcum powder, and mixing to obtain a mixture; spraying dicumyl peroxide and triallyl isocyanurate on the surface of the mixture for mixing, adding pigment and compound antioxidant, extruding to obtain a barrel blank master batch, performing injection molding and cooling to obtain a barrel blank, and dipping and draining. According to the invention, the combination property of the alpha-olefin ethylene copolymer and the polyvinylidene chloride and other raw materials is optimized through preparing the compatilizer, so that the combination tightness between the raw materials is greatly improved, the medium permeation channel is effectively reduced, the barrel opening forms a uniform and compact sealing layer through matching with the secondary dipping process and the compound emulsifier, and meanwhile, the barrel cover adopts the differential raw material proportion, so that the overall sealing performance and the medium permeation resistance of the plastic barrel are cooperatively improved.

Inventors

  • LI JUN
  • XIE ZHENGXIAN

Assignees

  • 上海龙程塑料制品有限公司

Dates

Publication Date
20260512
Application Date
20260325

Claims (10)

  1. 1. The preparation method of the high-tightness stacking plastic bucket is characterized by comprising the following steps of: s1, preheating 72-78 parts by weight of alpha-olefin ethylene copolymer, and drying nano montmorillonite; S2, adding 2-3 parts of compatilizer into the preheated alpha-olefin ethylene copolymer for mixing, sequentially adding 10-14 parts by weight of polyvinylidene chloride powder, 3-5 parts by weight of nano montmorillonite and 1-2 parts by weight of talcum powder, mixing to obtain a mixture, mixing 0.15-0.25 part by weight of dicumyl peroxide and 0.08-0.15 part by weight of triallyl isocyanurate to prepare a solution, spraying the solution onto the surface of the mixture, continuing mixing after the spraying is finished, adding 1.5-2.8 parts by weight of pigment and 0.1-0.2 part by weight of composite antioxidant, cooling and mixing to obtain a premixed base material; s3, adding the premixed base material into a double-screw extruder, extruding, water-cooling, granulating, and drying to obtain barrel blank master batches; S4, adding the barrel blank master batch into an injection molding machine, and maintaining pressure after three-stage injection; s5, cooling, demolding, and deburring after demolding to obtain a barrel blank; s6, immersing the barrel mouth in the primary immersion liquid, suspending and draining after immersing, immersing in the secondary immersion liquid, suspending and draining, and solidifying to obtain a barrel body; S7, adjusting the consumption of talcum powder and nano montmorillonite to prepare a barrel cover master batch, adding the barrel cover master batch into an injection molding machine, performing injection molding to obtain a barrel cover, embedding a sealing ring into the barrel cover, and screwing the barrel cover assembled with the sealing ring on a barrel body to obtain the high-tightness stacking plastic barrel.
  2. 2. The preparation method of the stacking plastic bucket with high tightness according to claim 1 is characterized in that, according to parts by weight, 85-95 parts of alpha-olefin ethylene copolymer, 3-7 parts of maleic anhydride, 0.1-0.3 part of dicumyl peroxide and 0.05-0.15 part of triallyl isocyanurate are weighed, the alpha-olefin ethylene copolymer, the maleic anhydride, the dicumyl peroxide and the triallyl isocyanurate are mixed for 3-5min at 200-300r/min and 50-60 ℃ to obtain premix, the premix is added into a twin-screw extruder, the temperature of the premix is divided into a first area 120-130 ℃, a second area 140-150 ℃, a third area 160-170 ℃, a fourth area 150-160 ℃ and a die head 140-150 ℃, the screw speed is set at 150-200r/min, water-cooling and granulating are carried out to obtain a crude product, and the crude product is dried at 70-80 ℃ for 3-5h to obtain the compatilizer.
  3. 3. The preparation method of the stacking plastic bucket with high tightness according to claim 2 is characterized by comprising the steps of weighing 10-15 parts of compatilizer, 8-12 parts of acrylic acid, 0.5-1.2 parts of compound emulsifying agent, 0.2-0.5 part of ammonium persulfate, 60-70 parts of deionized water and 0.1-0.3 part of dodecyl mercaptan according to parts by weight, adding the deionized water into a high-speed emulsifying machine, adding the compound emulsifying agent, stirring for 10-15min at 1000-1500r/min, sequentially adding the acrylic acid and the compatilizer in the stirring process, continuing stirring for 20-30min to obtain a pre-emulsion, adding 1/3-1/2 of the pre-emulsion into a reaction kettle, heating to 70-80 ℃, adding 1/3-1/2 of ammonium persulfate, preserving heat for 15-25min, dropwise adding the rest of ammonium persulfate at a rate of 1-3mL/min, dropwise adding the rest of ammonium persulfate at a rate of 0.5-1.5mL/min, obtaining a reaction product after dropwise adding the deionized water, preserving heat for 1-2h, sequentially adding the acrylic acid and the compatilizer to the mixture to a pH value of the reaction product to 0.80, continuously stirring for 20-30min to obtain the pre-emulsion, adding the pre-emulsion, and cooling to a filter material after the reaction product to 0.80 mesh is cooled to be adjusted to be 0.80.
  4. 4. The method for preparing the stacking plastic bucket with high tightness according to claim 3, wherein the compound emulsifier is prepared by compounding sodium dodecyl benzene sulfonate and nonylphenol polyoxyethylene ether in a mass ratio of 1-2.5:1.
  5. 5. The method for preparing the high-tightness stacking plastic bucket according to claim 1, wherein S2 is characterized in that 2-3 parts of compatilizer is added into the preheated alpha-olefin ethylene copolymer, mixed for 4-6min at 280-320r/min and 63-67 ℃, the rotating speed is reduced to 180-220r/min, 10-14 parts by weight of polyvinylidene chloride powder, 3-5 parts by weight of nano montmorillonite and 1-2 parts by weight of talcum powder are sequentially added, and mixed for 3-5min to obtain a mixture; Mixing 0.15-0.25 weight part of dicumyl peroxide with 0.08-0.15 weight part of triallyl isocyanurate, preparing a solution with the mass concentration of 3-5% by using ethanol, spraying the solution onto the surface of the mixture by atomization, reducing the rotating speed to 140-160r/min, and continuing to mix for 1.5-2.5min after the spraying is finished; Adding 1.5-2.8 parts by weight of pigment and 0.1-0.2 part by weight of compound antioxidant, cooling to room temperature along with a furnace, and mixing for 8-12min at 140-160r/min to obtain the premixed base material.
  6. 6. The method for preparing the high-tightness stacking plastic bucket according to claim 5, wherein the composite antioxidant is prepared by compounding an antioxidant 1010 and an antioxidant 168 according to a mass ratio of 1-2:1.
  7. 7. The method for preparing the stacking plastic bucket with high tightness according to claim 6, wherein S3 is characterized in that a premixed base material is added into a double screw extruder, wherein the temperature of the extruder is 133-137 ℃, 153-157 ℃, 163-167 ℃, 158-162 ℃ and 148-152 ℃ of a die head, the rotating speed of a screw rod is 170-190r/min, the pressure of the die head is 8-10MPa, and the base material is subjected to water cooling and granulating at 20-25 ℃ and drying for 2-3 hours at 68-72 ℃ to obtain the master batch of the bucket blank.
  8. 8. The method for preparing the stacking plastic bucket with high tightness according to claim 7, wherein S4 is characterized in that the master batch of the bucket blank is added into an injection molding machine, and the temperature of the bucket blank is set to be one zone 143-147 ℃, two zones 153-157 ℃, three zones 163-167 ℃ and nozzle 153-157 ℃; The three-stage injection process is adopted, wherein the first stage is filled into the cavity 25-33% at the injection pressure of 70-80MPa and the injection speed of 28-32mm/s, the second stage is filled into the cavity 70-80% at the injection pressure of 85-95MPa and the injection speed of 43-47mm/s, and the third stage is filled into the cavity 90-95% at the injection pressure of 55-65MPa and the injection speed of 8-12mm/s, and then the pressure is maintained for 18-22s.
  9. 9. The method for preparing the high-tightness stacking plastic bucket according to claim 8 is characterized in that S7 is specifically characterized in that talcum powder is adjusted to 0.8-1.2 parts by weight, nano montmorillonite is adjusted to 8-12 parts by weight, bucket cover master batch is prepared according to the step S1-3, the bucket cover master batch is added into an injection molding machine, the bucket cover is obtained through the step S4 by injection molding, a nitrile rubber sealing ring is embedded into the bucket cover, and the bucket cover assembled with the nitrile rubber sealing ring is screwed on a bucket body to obtain the high-tightness stacking plastic bucket.
  10. 10. A highly sealable, stacked plastic bucket made according to the method of any one of claims 1-9.

Description

High-tightness stacking plastic bucket and preparation method thereof Technical Field The invention relates to the technical field of high polymer materials, in particular to a high-tightness stacking plastic bucket and a preparation method thereof. Background The plastic bucket is widely applied to the storage and transportation fields of volatile micromolecular organic solvents by virtue of the advantages of light weight, impact resistance, convenience in molding and the like. However, the plastic permeation problem generally exists in the existing plastic barrels aiming at volatile organic solvents such as methanol and the like. In the process of containing the organic solvent for a long time, the outer side of the barrel wall still has sticky feel and continuously emits pungent smell, so that the loss of the organic solvent is caused, the risk of environmental pollution is also caused, and meanwhile, the safety of the storage environment is threatened. Based on the above, the invention designs a high-tightness stacking plastic bucket and a preparation method thereof to solve the problems. Disclosure of Invention Aiming at the defects existing in the prior art, the invention provides a preparation method of a high-tightness stacking plastic bucket, which comprises the following steps: s1, preheating 72-78 parts by weight of alpha-olefin ethylene copolymer, and drying nano montmorillonite; S2, adding 2-3 parts of compatilizer into the preheated alpha-olefin ethylene copolymer for mixing, sequentially adding 10-14 parts by weight of polyvinylidene chloride powder, 3-5 parts by weight of nano montmorillonite and 1-2 parts by weight of talcum powder, mixing to obtain a mixture, mixing 0.15-0.25 part by weight of dicumyl peroxide and 0.08-0.15 part by weight of triallyl isocyanurate to prepare a solution, spraying the solution onto the surface of the mixture, continuing mixing after the spraying is finished, adding 1.5-2.8 parts by weight of pigment and 0.1-0.2 part by weight of composite antioxidant, cooling and mixing to obtain a premixed base material; s3, adding the premixed base material into a double-screw extruder, extruding, water-cooling, granulating, and drying to obtain barrel blank master batches; S4, adding the barrel blank master batch into an injection molding machine, and maintaining pressure after three-stage injection; s5, cooling, demolding, and deburring after demolding to obtain a barrel blank; s6, immersing the barrel mouth in the primary immersion liquid, suspending and draining after immersing, immersing in the secondary immersion liquid, suspending and draining, and solidifying to obtain a barrel body; S7, adjusting the consumption of talcum powder and nano montmorillonite to prepare a barrel cover master batch, adding the barrel cover master batch into an injection molding machine, performing injection molding to obtain a barrel cover, embedding a sealing ring into the barrel cover, and screwing the barrel cover assembled with the sealing ring on a barrel body to obtain the high-tightness stacking plastic barrel. Further, the preparation method of the compatilizer comprises the steps of weighing 85-95 parts of alpha-olefin ethylene copolymer, 3-7 parts of maleic anhydride, 0.1-0.3 part of dicumyl peroxide and 0.05-0.15 part of triallyl isocyanurate according to parts by weight, mixing the alpha-olefin ethylene copolymer, the maleic anhydride, the dicumyl peroxide and the triallyl isocyanurate for 3-5min at 200-300r/min and 50-60 ℃ to obtain a premix, adding the premix into a double-screw extruder, setting the temperature of the premix to be 120-130 ℃ in a first region, 140-150 ℃ in a second region, 160-170 ℃ in a third region, 150-160 ℃ in a fourth region and 150-150 ℃ in a die head, setting the rotating speed of a screw to be 150-200r/min, performing water cooling granulation at 20-25 ℃ to obtain a crude product, and drying the crude product at 70-80 ℃ for 3-5h to obtain the compatilizer. The preparation method of the impregnating solution comprises the steps of weighing 10-15 parts of compatilizer, 8-12 parts of acrylic acid, 0.5-1.2 parts of compound emulsifier, 0.2-0.5 part of ammonium persulfate, 60-70 parts of deionized water and 0.1-0.3 part of dodecyl mercaptan according to parts by weight, adding the deionized water into a high-speed emulsifying machine, adding the compound emulsifier, stirring for 10-15min at 1000-1500r/min, sequentially adding the acrylic acid and the compatilizer during stirring, continuously stirring for 20-30min to obtain the pre-emulsion, adding 1/3-1/2 of the pre-emulsion into a reaction kettle, heating to 70-80 ℃, adding 1/3-1/2 of ammonium persulfate, preserving heat for 15-25min, dropwise adding the rest of ammonium persulfate at a rate of 1-3mL/min, obtaining a reaction material after dropwise adding the ammonium persulfate at a rate of 0.5-1.5mL/min, subsequently adding the reaction material to 30-40 ℃, adding ammonia water, adjusting the pH valu