阅读说明：本技术 一种pp-pet纳米银抗菌玩具外壳材料的制备方法 (Preparation method of PP-PET nano-silver antibacterial toy shell material ) 是由 刘加权 于 2020-06-23 设计创作，主要内容包括：本发明属于纳米银抗菌玩具生产技术领域,尤其为一种PP-PET纳米银抗菌玩具外壳材料的制备方法,包括下列步骤：S1：粉碎、混料,将PP材料和PET材料均粉碎成颗粒状或粉末,然后按照设定的比例混合构成组分,并搅拌均匀；S2：加热、添加稳定剂,将混料后的PP材料和PET材料投放至加热釜中,扣合密封盖后逐渐升温至100—130摄氏度,然后在其中加入稳定剂并持续搅拌10—15分钟；S3：注模,将熔化状态的PP-PET材料灌注至模具中。本发明通过将加热釜中抽真空至0.01—0.05标准大气压,抽真空状态下的加热釜内腔能够避免PP-PET材料氧化或氮化,保证PP-PET材料的质量稳定性,在其中组分中加入稳定剂防止其分解、老化,增强玩具外壳的结构稳定性和使用寿命。(The invention belongs to the technical field of nano-silver antibacterial toy production, and particularly relates to a preparation method of a PP-PET nano-silver antibacterial toy shell material, which comprises the following steps: s1: crushing and mixing materials, namely crushing the PP material and the PET material into particles or powder, then mixing the particles or powder according to a set proportion to form a component, and uniformly stirring the components; s2: heating and adding a stabilizer, putting the mixed PP material and PET material into a heating kettle, fastening a sealing cover, gradually heating to 100-130 ℃, adding the stabilizer, and continuously stirring for 10-15 minutes; s3: injection molding, the molten state of the PP-PET material is poured into a mold. The heating kettle is vacuumized to 0.01-0.05 standard atmospheric pressure, the inner cavity of the heating kettle in a vacuumized state can avoid the oxidation or nitridation of the PP-PET material, the quality stability of the PP-PET material is ensured, the stabilizer is added into the components to prevent the PP-PET material from being decomposed and aged, and the structural stability and the service life of the toy shell are enhanced.)

1. A preparation method of a PP-PET nano silver antibacterial toy shell material is characterized by comprising the following steps: comprises the following steps:

s1: crushing and mixing materials, namely crushing the PP material and the PET material into particles or powder, then mixing the particles or powder according to a set proportion to form a component, and uniformly stirring the components;

s2: heating and adding a stabilizer, putting the mixed PP material and PET material into a heating kettle, fastening a sealing cover, gradually heating to 100-130 ℃, adding the stabilizer, and continuously stirring for 10-15 minutes;

s3: injecting a molten PP-PET material into a mold, and cooling the material to obtain a toy shell main body;

s4: shaping and trimming, namely placing the taken toy shell main body in a support frame for fixing and shaping, and trimming to remove burrs on the side or in an injection molding hole;

s5: performing electrostatic polishing, wherein the surface of the shaped toy shell is rubbed by a brush to ensure that the surface is smooth and generates static electricity;

s6: and the nano-coating is formed by spraying an organic solvent containing a high nano-silver material on the surface of the toy shell with static electricity, or soaking the toy shell into a solution containing the nano-silver material for a proper time, then taking out the toy shell, and depositing nano-silver particles on the surface of the toy shell to form a nano-silver coating after the organic solvent is volatilized.

2. The preparation method of the PP-PET nano silver antibacterial toy shell material according to claim 1, is characterized in that: the ratio of the PP material to the PET material is 4: 6.

3. The preparation method of the PP-PET nano silver antibacterial toy shell material according to claim 1, is characterized in that: in the step S2, the heating kettle is vacuumized to 0.01-0.05 standard atmospheric pressure, and the stabilizer is organic tin or lead salt.

4. The preparation method of the PP-PET nano silver antibacterial toy shell material according to claim 1, is characterized in that: in the step of S6, the organic solvent is ethanol or ether or acetone, and the thickness of the obtained nano plating layer is 200-500 nm.

Technical Field

The invention relates to the technical field of nano-silver antibacterial toy production, in particular to a preparation method of a PP-PET nano-silver antibacterial toy shell material.

Background

PP is short for polypropylene, the polypropylene is thermoplastic synthetic resin with excellent performance, has chemical resistance, heat resistance, electrical insulation, high-strength mechanical property, good high-wear-resistance processing property and the like, is widely developed and applied in various fields, and because the polypropylene has plasticity, the polypropylene material gradually replaces wooden products, and the high-strength toughness and the high-wear-resistance property gradually replace the mechanical function of metal; in addition, the PP has good grafting and compounding functions; PET is divided into fiber-grade polyester chips and non-fiber-grade polyester chips, the fiber-grade polyester is used for manufacturing polyester staple fibers and polyester filaments, is a raw material for supplying polyester fiber enterprises to process fibers and related products, is widely applied to the fields of packaging industry, electronic and electric appliances, medical treatment and health, buildings, automobiles and the like, and the packaging is the largest non-fiber application market of polyester and is also the field of the fastest increase of PET; the nano silver is a metal silver simple substance with the particle size of nano grade, the particle size of the nano silver is mostly about 25 nm, the nano silver has strong inhibiting and killing effects on dozens of pathogenic microorganisms such as escherichia coli, gonococcus, chlamydia trachomatis and the like, and the nano silver can not generate drug resistance; the surface effect, quantum size effect and the like of the nano silver particles lead the nano silver particles to have some special purposes, such as surface enhanced Raman application, medical application and the like; researches show that the smaller the particle size, the stronger the bactericidal performance, so that the nano-silver has wide application in the aspects of antibacterial medicines and medical instruments, antibacterial plastics and rubber products, antibacterial textiles and clothes, shoes and socks, antibacterial coatings, ceramics and glass, green antibacterial coatings and the like, and is also applied to the production of shells of antibacterial toys; in view of the above, it would be desirable to produce a toy housing with automatic antimicrobial and germicidal functions.

The prior preparation method of the antibacterial toy shell material has the following problems:

1. the existing preparation method of the antibacterial toy shell material has poor manufacturability, thus leading to poor production quality and low efficiency.

2. The existing preparation method of the antibacterial toy shell material cannot correspondingly adjust the stabilizer according to the intimacy of the material contacting children in production, so that the children can contact plastic toys harmful to the bodies of the children due to the mouth and the nose.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a preparation method of a PP-PET nano silver antibacterial toy shell material, and solves the problems that the existing preparation method of the antibacterial toy shell material is poor in manufacturability, poor in production quality and low in efficiency, and a stabilizer cannot be correspondingly adjusted according to the intimacy degree of the material contacting children in production.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a PP-PET nano silver antibacterial toy shell material comprises the following steps:

s1: crushing and mixing materials, namely crushing the PP material and the PET material into particles or powder, then mixing the particles or powder according to a set proportion to form a component, and uniformly stirring the components;

s2: heating and adding a stabilizer, putting the mixed PP material and PET material into a heating kettle, fastening a sealing cover, gradually heating to 100-130 ℃, adding the stabilizer, and continuously stirring for 10-15 minutes;

s3: and (3) injection molding, namely, pouring the PP-PET material in a molten state into a mold, and cooling the material to obtain the toy shell main body.

S4: shaping and trimming, namely placing the taken toy shell main body in a support frame for fixing and shaping, and trimming to remove burrs on the side or in an injection molding hole;

s5: performing electrostatic polishing, wherein the surface of the shaped toy shell is rubbed by a brush to ensure that the surface is smooth and generates static electricity;

s6: and the nano-coating is formed by spraying an organic solvent containing a high nano-silver material on the surface of the toy shell with static electricity, or soaking the toy shell into a solution containing the nano-silver material for a proper time, then taking out the toy shell, and depositing nano-silver particles on the surface of the toy shell to form a nano-silver coating after the organic solvent is volatilized.

As a preferable technical scheme of the invention, the ratio of the PP material to the PET material is 4:6 according to the respective weight.

As a preferred technical scheme of the invention, in the step S2, the heating kettle is vacuumized to 0.01-0.05 standard atmospheric pressure, and the stabilizer is organic tin or lead salt.

As a preferred technical scheme of the invention, in the step S6, the organic solvent is ethanol or ether or acetone, and the thickness of the obtained nano-coating is 200-500 nm.

(III) advantageous effects

Compared with the prior art, the invention provides a preparation method of a PP-PET nano silver antibacterial toy shell material, which has the following beneficial effects:

1. according to the preparation method of the PP-PET nano silver antibacterial toy shell material, a heating kettle is vacuumized to 0.01-0.05 standard atmospheric pressure, the inner cavity of the heating kettle in the vacuumized state can avoid oxidation or nitridation of the PP-PET material, the quality stability of the PP-PET material is guaranteed, a stabilizer is added into the components of the PP-PET nano silver antibacterial toy shell material to prevent the PP-PET material from being decomposed and aged, and the structural stability and the service life of the toy shell are enhanced.

2. According to the preparation method of the PP-PET nano silver antibacterial toy shell material, the stabilizer is organic tin or lead salt, the organic tin has extraordinary thermal stability and thermal stability, and contacts with a preferred thermal stabilizer of PP-PET for food, so that the PP-PET nano silver antibacterial toy shell material can be used in toys contacting with skin, and in common salt lead salt, the effective lead content of tribasic lead sulfate which is widely applied in the PP-PET industry is higher, and the PP-PET nano silver antibacterial toy shell material has more excellent thermal stability than other products, so that the PP-PET nano silver antibacterial toy shell material can be used in toy shells not closely contacting with skin.

Drawings

FIG. 1 is a schematic diagram of the production flow and process conditions of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.