KR20090088168A

KR20090088168A - Preparation method of silver nano synthetic resin pellet through the coating process by using nano silver ink on the surface synthetic resin pellet

Info

Publication number: KR20090088168A
Application number: KR1020080013554A
Authority: KR
Inventors: 문장조; 조민호
Original assignee: (주)지알엔지니어링
Priority date: 2008-02-14
Filing date: 2008-02-14
Publication date: 2009-08-19

Abstract

A method for manufacturing a silver nano synthetic resin pellet through coating of silver ink is provided to minimize the use amount of silver and function as a silver. A method for coating a silver solution of nano to various synthetic resin pellets comprises: a step of adding the synthetic resin pellets in a processor of fluid layer along the air flow; a step of evenly dispersing a binder in a bottom spray method; a step of dispersing silver solution through processor of fluid layer with a bottom spray method; and a step of evenly coating on the surface of the pellet.

Description

Preparation method of silver nano synthetic resin pellet through the coating process by using nano silver ink on the surface synthetic resin pellet}

Development of various synthetic resin materials with antimicrobial and bactericidal properties by coating silver on the surface of synthetic resin pellets.

Conventional plating method is regarded as an industry with enormous electricity consumption and environmental impact from wastewater treatment. By applying a fluidized bed process to eliminate this, it may be a proposal to reduce the amount of heat required and to minimize the environmental impact. Fluidized bed process machine is a core process which is widely used in chemical industry for synthesis, reaction as well as transfer, mixing, heat exchange, coating, drying, separation, granulation, and adsorption of powder. It was registered as patent in 1922 and first applied to industrialization in 1926. Field.

1. A method of uniformly coating silver on the surface of a synthetic resin pellet in order to achieve the above object.

2.How long the bleeding lasts in nature.

The type and size of the resin pellets are determined so that silver is evenly coated on the surface of the resin pellets. The pellets are sized according to the purpose of use, and then placed in the container of the fluidized bed process through the sorting operation.

Only the bottom spray method is used in the fluidized bed process, and uniform film formation is possible, and it must be manufactured as a process machine capable of high temperature (over 180 ° C) processing in the manufacturing process.

Binders are selected and determined so that the nano-silver solution can be attached to the resin pellets at high temperature. In particular, the binder is determined depending on the material. For example, since the PP (PolyPropylene) pellet surface is smooth and the silver solution is unevenly attached, a binder is necessary. In addition, the silver solution may be coated directly on the material that can remove the binder.

The choice of binders that can be used at high temperatures (100-150 ° C) and good dispersibility and bonding properties allows them to maintain the required periods and coating conditions even under harsh conditions when exposed to natural conditions or during processing. It is an essential element in order to give flexibility in the process so that it can be used as various materials.

It is possible to make the best use of the existing resources through the manufacturing method that uniformly coats the minimum amount of silver that meets the purpose and economics on the surface of the synthetic resin pellets to minimize the consumption of silver and act as the whole silver. In order to reduce the cost and increase the competitiveness of the electric and electronic industries, and to reduce the production of synthetic resin products, the silver particles are evenly distributed when the synthetic resin is mixed, and the present invention is developed to develop materials having various antibacterial and bactericidal properties. Applicable

Manufacturing process method

1.Put the particles into the fluidized bed process container

2. The flow of hot air in the process unit evaporates the moisture present in the particles.

3. Spray the binder through the nozzle. At this time, the nozzle pressure is 0.5 ~ 3.5kg / cm ² .

4. The binder is usually 0.5-20% by weight of the base material, and the binder is acid- and base-safe, and has no harmful elements. It is an acrylate copolymer modified product, soda acrylate, styrene copolymer, polyvinyl derivative, meta Krylic acid, ethyl acrylate copolymers, eutracetes, corn protein extracts and artificially processed analogs thereof, sodium alginate, alginic acid, shellacs, carboxyvinyl polymers, hydroxypropylmethylcellulose phthalates, hydroxypropylmethylcellulose Acetate succinate, hydroxypropylmethyl acetate succinate, carboxymethyl cellulose, cellulose acetate phthalates, hydroxypropyl cellulose, ethyl cellulose, methyl cellulose, polyvinylacetate phthalate, soy protein, wheat protein, soy protein or wheat Protein processing material, chitin, chitin, chitin or chitin Processing materials of tinic acid, agar, carrageenan, pectin, guar gum, locust bean gum, xanthan gum, gellan gum, arabian Arabic gum, Kollicoat (Kollicoat), any one or two or more selected from heavy chain fatty acids having 6 to 12 carbon atoms can be used in combination.

5. Spray the silver solution through the nozzle.

6. After forming the film thickness that meets the intended purpose, stop spraying, and then dry the silver solution with sufficient drying and evaporate from the container.

Example 1.

One step coating: Binder coating process

PP (PolyPropylene] pellet of 6mesh (300μm) size was selected and 1,500g was improved and introduced into the fluidized bed process machine, and then 10g of acrylate copolymer modified binder was stirred at 10% by weight in water, and the bottom spray method was used in the fluidized bed process. Spray.

Two-stage coating: coating process of silver solution

After the process is completed, the silver solution is sprayed 5% by weight of the PolyPropylene pellet weight in a bottom spray method in a fluidized bed process. Nozzle pressure 1kg / cm², inlet temperature is 110 ℃ and product temperature is 100 ℃ or higher.

Example 2.

One step coating: Binder coating process

ABS (Acrylonitrile Butadiene Styrene) pellets of 6 mesh (300μm) size were screened, 1,500 g was improved, introduced into a fluidized bed process unit, and 20 g of an acrylate copolymer modified binder was stirred at 10% by weight in water to bottom in the fluidized bed process. Spray by spray method.

Two-stage coating: coating process of silver solution

After the process is completed, the silver solution is sprayed with a bottom spray method of 10% by weight of the Acrylonitrile Butadiene Styrene pellet weight in a fluid bed process. Nozzle pressure 1.5kg / cm², inlet temperature is 120 ℃ and product temperature is 110 ℃ or more.

1: PP [PolyPropylene] Pellets

Figure 2: PP [PolyPropylene] pellets after coating

Figure 3: PC / PBT [Polycarbonate + Polybutyleelephthalate] Pellets

Figure 4: PC / PBT [Polycarbonate + Polybutyleelephthalate] pellets after coating

Figure 5: PMMA [polymer-methyl methacrylate] pellets

Figure 6: PMMA [polymer-methyl methacrylate] pellets after coating

Figure 7: PBT [Polybutylene Telephthalate] Pellets

8: PBT [polybutylene terephthalate] pellet after coating

9: LDPE [Low Density Polystyrene] Pellets

Figure 10 LDPE [low density polystyrene] pellets after coating

Figure 11: HIPS 425 TVN Pellets

12: HIPS 425 TVN pellets after coating

Figure 13: ABS [Acrylonitrile + Butadiene + Styrene Copolymer Resin] Pellets

14: ABS [acrylonitrile + butadiene + styrene copolymer resin] pellets after coating

15: PC [polycarbonate] pellets

Figure 16: PC [polycarbonate] pellets after coating

Claims

A method of coating a nano-silver solution on various synthetic resin pellets. The resin pellets are introduced into a fluidized bed process to fluidize according to the flow of air, and the binder is dispersed in a bottom spray method so as to uniformly coat the resin. Thereafter, the silver solution is dispersed in a bottom spray method through the same fluidized bed process and uniformly coated on the surface of various resin pellets.

Synthetic resins of the synthetic resin pellets are PP [polypropylene], PE [polystyrene], EVA [ethylene acetate], HDPE [high density fullityene], LDPE [low density polystyrene], LLDPE [Linear Low-density Polyethlene], MDPE [Medium-Density Polyethylene], PVC [Vinyl Chloride], PS [Polystyrene], ABS [Acrylonitrile + Butadiene + Styrene Copolymer Resin], POM [Polyacetal], PPO [Polyphenylene Oxide], PPE [Poly Phenylene oxide], PAm [polyamide (nylon)], PC [polycarbonate], PBT [polybutylene terephthalate], U [U polymer], PSF [polysulfone], PPS [polyphenylene sulfide], PEI [Polyetherimida], PES [polyethersulfone], PAR [polyarylate], PEEK [polyetheretherketone], PTFE [tetrafluoroethylene resin], PAI [polyamideimide], PI [polyimide], It refers to a general synthetic resin pellet such as PMMA [polymer-methyl methacrylate] and a synthetic resin pellet mixed with two or more synthetic resins.

Examples of the binder include an acrylate copolymer modified body, an acrylic acid soda, a styrene copolymer, a polyvinyl derivative, methacrylic acid, ethyl acrylate copolymers, eudragits, corn protein extracts, and artificially processed analogs thereof, sodium alginate, alginic acid, Shellac, carboxyvinyl polymer, hydroxypropylmethylcellulose phthalate, hydroxypropylmethylcellulose acetate succinate, hydroxypropylmethyl acetate succinate, carboxymethyl cellulose, cellulose acetate phthalate, hydroxypropyl cellulose, ethyl cellulose , Methyl cellulose, polyvinylacetate phthalate, soy protein, wheat protein, soy protein or wheat protein processed material, chitin, chitin acid, chitin or chitin processed material, agar, carrageenan, pectin, Guar gum, Locust bea n gum, Xanthan gum, Gellan gum, Arabic gum, Kollicoat, any one or two selected from heavy chain fatty acids having 6 to 12 carbon atoms Binder used.

Manufacturing method using 0.5 to 20% by weight of binder

Dispersion of the silver solution by the bottom spray method in the fluidized bed process, but 0.5 to 50% by weight based on the weight of the various synthetic resin pellets, the manufacturing method characterized in that