Production process of antibacterial wear-resistant plastic toy

Abstract

The invention discloses a production process of an antibacterial and wear-resistant plastic toy. The production process of the antibacterial and wear-resistant plastic toy comprises the following steps: mixing PVC powder with a plasticizer, a stabilizer, a lubricant, a coloring agent and the like in proportion; adding the mixed PVC raw materials into a hopper of an injection molding machine, and conveying the PVC raw materials into a heating cylinder through a screw rod; the raw materials are heated and plasticized in the heating cylinder; the screw rod rotates to uniformly mix the plasticized PVC and gradually push the plasticized PVC to a mold opening; the plasticized PVC is injected into the mold cavity at the preset injection molding temperature under the preset injection molding pressure; the injection pressure is kept for a period of time, the mold is filled with the PVC material, preliminary cooling is conducted, and the pressure keeping time depends on the thickness and shape of the product; after the pressure maintaining is finished, continuously cooling the toy in the mold; and after cooling is completed, opening the mold, and taking out the formed toy. According to the production process of the antibacterial wear-resistant plastic toy disclosed by the invention, the plastic toy is produced by adopting the PVC material particles with the antibacterial property, so that the antibacterial function of the plastic toy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic toy production, in particular to a production process of antibacterial and wear-resistant plastic toys. Background Art

[0002] Plastic toys are widely used in the children's toy market. They are popular because they are light, durable, easy to process and can be made into various shapes and colors. Plastic toys cover a variety of products from simple building blocks, dolls, animal models to complex electronic toys, remote control cars, etc. PVC materials have long been widely used in the production of soft toys, plastic dolls, inflatable toys and other plastic toys because of their good chemical resistance, wear resistance, insulation and soft texture. The softness of the toy can be adjusted by adding plasticizers according to different product requirements. Since children are the main contact group of plastic toys, their safety is one of the important design points of plastic toys, and antibacterial properties are an important part of verifying the safety of plastic toys.

[0003] However, due to the addition of some plasticizers in existing PVC toys, there are adverse risks to children's health, which may cause endocrine disruption in children and affect their development. In addition, existing PVC does not have good antibacterial properties and its product safety is relatively low. Summary of the invention

[0004] Based on this, it is necessary to provide a production process for antibacterial and wear-resistant plastic toys to address the technical problems of safety risks in existing PVC plastic toys.

[0005] A production process for antibacterial and wear-resistant plastic toys, the production process for antibacterial and wear-resistant plastic toys comprising the following steps: Mix PVC powder with plasticizer, stabilizer, lubricant, colorant, etc. in proportion to obtain a uniform mixture; Add the mixed PVC raw materials into the hopper of the injection molding machine and convey them into the heating cylinder through the screw; The raw materials are heated and plasticized in the heating cylinder, and the temperature is set at 170-190°C. The screw rotates to mix the plasticized PVC evenly and gradually push it to the mold mouth; The plasticized PVC is injected into the mold cavity at a preset injection temperature and a preset injection pressure; Maintain the injection pressure for a while to allow the PVC material to fill the mold and cool initially. The holding time depends on the thickness and shape of the product. After the pressure holding is completed, continue to cool the toy in the mold for 20-60 seconds; After cooling is completed, open the mold and take out the molded toy; Trim, deburr or perform other necessary post-processing on the products.

[0006] The preparation process of PVC pellets includes the following steps: According to the weight percentage, 100 parts of PVC, 10 parts of DEHCH, 10-40 parts of QPEPBSS, 3 parts of ESO and 2 parts of Ca-Zn stabilizer are mixed and stirred; after being evenly stirred, they are transferred to a high-speed mixer for thorough mixing; then they are placed in an oven at 80°C for pre-plasticization; after the powder material becomes fluffy powder, it is transferred to a double-roll mill for mixing, the mixing temperature is 160°C, the rotation speed is 30rpm, and the mixing time is 1min; then 10-40 parts of PEPBSS are added and the mixing is continued for 10min, and finally the basic pelletization is performed to obtain PVC pellets.

[0007] In one embodiment, the injection molding temperature is 170-190°C.

[0008] In one embodiment, the mold temperature is 40-60°C.

[0009] In one of the embodiments, the injection pressure is 50-120 MPa.

[0010] In one embodiment, the above-mentioned holding time is 5-20 seconds.

[0011] In one embodiment, the production process of the antibacterial and wear-resistant plastic toys further includes the steps of grinding and polishing, grinding and polishing the surface of the finished product to remove possible burrs or rough surfaces and improve the surface finish.

[0012] In one embodiment, the production process of the antibacterial and wear-resistant plastic toys further includes the steps of spraying, spraying primer, color paint and topcoat on the toys according to design requirements to enhance the appearance.

[0013] In one embodiment, the production process of the antibacterial and wear-resistant plastic toy further includes the step of coating, wherein the toy parts are subjected to coating treatment to increase the metallic luster and protect the surface.

[0014] In one embodiment, the production process of the antibacterial and wear-resistant plastic toy further includes the steps of: parts assembly, assembling the injection-molded components according to the design.

[0015] In one embodiment, the preparation process of the above-mentioned PVC pellets includes the following steps: mixing 100 parts of PVC, 10 parts of DEHCH, 10 parts of QPEPBSS, 3 parts of ESO and 2 parts of Ca-Zn stabilizer by weight; transferring to a high-speed mixer after stirring evenly for thorough mixing; then pre-plasticizing in an 80°C oven; until the powder becomes fluffy powder, transferring to a double-roll mill for mixing, the mixing temperature is 160°C, the speed is 30rpm, and the mixing time is 1min; then adding 10 parts of PEPBSS and continuing mixing for 10min, and finally basic pelletizing to obtain PVC pellets.

[0016] In one embodiment, the preparation process of the above-mentioned PVC pellets includes the following steps: mixing 100 parts of PVC, 10 parts of DEHCH, 40 parts of QPEPBSS, 3 parts of ESO and 2 parts of Ca-Zn stabilizer by weight; transferring to a high-speed mixer after stirring evenly for thorough mixing; then pre-plasticizing in an 80°C oven; after the powder becomes fluffy powder, transferring to a double-roll mill for mixing, the mixing temperature is 160°C, the speed is 30rpm, and the mixing time is 1min; then adding 40 parts of PEPBSS and continuing mixing for 10min, and finally basic pelletizing to obtain PVC pellets.

[0017] In one embodiment, the preparation process of the above-mentioned PVC pellets includes the following steps: mixing 100 parts of PVC, 10 parts of DEHCH, 30 parts of QPEPBSS, 3 parts of ESO and 2 parts of Ca-Zn stabilizer by weight; transferring to a high-speed mixer after stirring evenly for thorough mixing; then pre-plasticizing in an 80°C oven; after the powder becomes fluffy powder, transferring to a double-roll mill for mixing, the mixing temperature is 160°C, the speed is 30rpm, and the mixing time is 1min; then adding 10 parts of PEPBSS and continuing mixing for 10min, and finally basic pelletizing to obtain PVC pellets.

[0018] The above-mentioned production process of antibacterial and wear-resistant plastic toys can effectively improve the migration problem of plasticizers in PVC by adding bio-based polyester elastomer PEPBSS into the preparation of PVC pellets, thereby effectively reducing the harm of PVC plastic toys to children. At the same time, quaternary ammonium polyester QPEPBSS with antibacterial function obtained by introducing quaternary ammonium salt groups with antibacterial function into PEPBSS molecules can be compounded with DEHCH to prepare migration-resistant PVC materials with antibacterial properties, and then the above-mentioned production process of antibacterial and wear-resistant plastic toys is processed to obtain PVC plastic toys with antibacterial and migration-resistant properties. In addition, the PVC material itself has excellent wear resistance, thereby effectively improving the wear resistance of plastic toys while ensuring the antibacterial properties of plastic toys. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in combination with the following. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below. Example 1

[0020] The present invention discloses a production process of an antibacterial and wear-resistant plastic toy, and the production process of the antibacterial and wear-resistant plastic toy comprises the following steps: Mix PVC powder with plasticizer, stabilizer, lubricant, colorant, etc. in proportion to obtain a uniform mixture; The mixed PVC raw materials are added into the hopper of the injection molding machine and transported into the heating cylinder through the screw.

[0021] The raw materials are heated and plasticized in the heating cylinder, and the temperature is set at 170-190°C. The screw rotates to mix the plasticized PVC evenly and gradually push it to the mold mouth.

[0022] The plasticized PVC is injected into the mold cavity at a preset injection temperature and a preset injection pressure.

[0023] Maintain the injection pressure for a while to allow the PVC material to fill the mold and cool initially. The holding time depends on the thickness and shape of the product.

[0024] After the pressure holding is completed, continue to cool the toy in the mold for 20-60 seconds.

[0025] After cooling is complete, open the mold and take out the molded toy.

[0026] Trim, deburr or perform other necessary post-processing on the products.

[0027] Specifically, the above injection molding temperature is 170-190°C.

[0028] Specifically, the above-mentioned mold temperature is: 40-60°C.

[0029] Specifically, the above injection pressure is: 50-120MPa.

[0030] Specifically, the above-mentioned holding time is: 5-20 seconds.

[0031] Furthermore, the production process of the above-mentioned antibacterial and wear-resistant plastic toys also includes the steps of grinding and polishing, grinding and polishing the surface of the finished product to remove possible burrs or rough surfaces and improve the surface finish.

[0032] Furthermore, the production process of the above-mentioned antibacterial and wear-resistant plastic toys also includes the steps of spraying, spraying primer, color paint and topcoat on the toys according to design requirements to improve the appearance effect.

[0033] Furthermore, the production process of the above-mentioned antibacterial and wear-resistant plastic toys also includes the step of: coating, in which the toy parts are subjected to coating treatment to increase the metallic luster and protect the surface.

[0034] Furthermore, the production process of the above-mentioned antibacterial and wear-resistant plastic toys also includes the steps of: parts assembly, assembling the various injection-molded parts according to the design.

[0035] Furthermore, the preparation process of PVC pellets includes the following steps: According to the weight percentage, 100 parts of PVC, 10 parts of DEHCH, 10-40 parts of QPEPBSS, 3 parts of ESO and 2 parts of Ca-Zn stabilizer are mixed and stirred; after being evenly stirred, they are transferred to a high-speed mixer for thorough mixing; then they are placed in an oven at 80°C for pre-plasticization; after the powder material becomes fluffy powder, it is transferred to a double-roll mill for mixing, the mixing temperature is 160°C, the rotation speed is 30rpm, and the mixing time is 1min; then 10-40 parts of PEPBSS are added and the mixing is continued for 10min, and finally the basic pelletization is performed to obtain PVC pellets. In the above-mentioned PVC pellet preparation, the migration problem of plasticizers in PVC can be effectively improved by incorporating bio-based polyester elastomer PEPBSS, thereby effectively reducing the harm of PVC plastic toys to children. At the same time, quaternary ammonium polyester QPEPBSS with antibacterial function obtained by introducing quaternary ammonium salt groups with antibacterial function into PEPBSS molecules can be compounded with DEHCH to prepare migration-resistant PVC materials with antibacterial properties, and then processed through the above-mentioned production process of antibacterial and wear-resistant plastic toys to obtain antibacterial and migration-resistant PVC plastic toys. In addition, the PVC material itself has excellent wear resistance, thereby effectively improving the wear resistance of plastic toys while ensuring the antibacterial properties of plastic toys. Example 2

[0036] In this embodiment, the preparation process of PVC pellets includes the following steps: According to weight percentage, 100 parts of PVC, 10 parts of DEHCH, 10 parts of QPEPBSS, 3 parts of ESO and 2 parts of Ca-Zn stabilizer are mixed and stirred; after stirring evenly, they are transferred to a high-speed mixer for thorough mixing; then they are placed in an 80°C oven for pre-plasticization; after the powder material becomes fluffy powder, it is transferred to a double-roll mill for mixing, the mixing temperature is 160°C, the rotation speed is 30rpm, and the mixing time is 1min; then 10 parts of PEPBSS are added and mixing is continued for 10min, and finally the basic pelletizing is performed to obtain PVC pellets. Example 3

[0037] In this embodiment, the preparation process of PVC pellets includes the following steps: According to the weight percentage, 100 parts of PVC, 10 parts of DEHCH, 40 parts of QPEPBSS, 3 parts of ESO and 2 parts of Ca-Zn stabilizer are mixed and stirred; after being stirred evenly, they are transferred to a high-speed mixer for thorough mixing; then they are placed in an oven at 80°C for pre-plasticization; after the powder material becomes fluffy powder, it is transferred to a double-roll mill for mixing at a mixing temperature of 160°C, a rotation speed of 30rpm, and a mixing time of 1min; then 40 parts of PEPBSS are added and mixing is continued for 10min, and finally the basic pelletization is performed to obtain PVC pellets. Example 4

[0038] In this embodiment, the preparation process of PVC pellets includes the following steps: According to the weight percentage, 100 parts of PVC, 10 parts of DEHCH, 30 parts of QPEPBSS, 3 parts of ESO and 2 parts of Ca-Zn stabilizer are mixed and stirred; after being stirred evenly, they are transferred to a high-speed mixer for thorough mixing; then they are placed in an oven at 80°C for pre-plasticization; after the powder material becomes fluffy powder, it is transferred to a double-roll mill for mixing at a mixing temperature of 160°C, a rotation speed of 30 rpm, and a mixing time of 1 min; then 10 parts of PEPBSS are added and mixing is continued for 10 min, and finally the basic pelletizing is performed to obtain PVC pellets.

[0039] In this embodiment, under the condition that the total addition amount of DEHCH and PEPBSS is fixed, as the content of PEPBSS increases, the elongation at break of the material gradually decreases, and the hardness gradually increases, but they are all soft PVC materials. The low-temperature impact strength of the material increases and the toughness is enhanced. In addition, as the content of PEPBSS increases, the migration resistance of the material gradually increases, and PEPBSS can effectively improve the migration problem of the plasticizer in the PVC material. When PVC / DEHCH / PEPBSS / QPEPBSS / ESO / Ca-Zn stabilizer (100 / 10 / 10 / 30 / 3 / 2), the material has both excellent mechanical properties and migration resistance, and excellent antibacterial properties and biocompatibility, so that the plastic toys produced by the above-mentioned PVC pellets have good antibacterial properties, and can avoid the migration of plasticizers, greatly improving the safety of PVC plastic toys.

[0040] In summary, the production process of antibacterial and wear-resistant plastic toys disclosed in the present invention can effectively improve the migration problem of plasticizers in PVC by adding bio-based polyester elastomer PEPBSS into the preparation of PVC pellets, thereby effectively reducing the harm of PVC plastic toys to children. At the same time, quaternary ammonium polyester QPEPBSS with antibacterial function obtained by introducing quaternary ammonium salt groups with antibacterial function into PEPBSS molecules can be compounded with DEHCH to prepare migration-resistant PVC materials with antibacterial properties, and then the above-mentioned production process of antibacterial and wear-resistant plastic toys is processed to obtain PVC plastic toys with antibacterial and migration resistance. In addition, the PVC material itself has excellent wear resistance, thereby effectively improving the wear resistance of plastic toys while ensuring the antibacterial properties of plastic toys.

[0041] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A production process for antibacterial and wear-resistant plastic toys, characterized in that: The steps include: Mix PVC powder with plasticizer, stabilizer, lubricant, colorant, etc. in proportion to obtain a uniform mixture; Add the mixed PVC raw materials into the hopper of the injection molding machine and convey them into the heating cylinder through the screw; The raw materials are heated and plasticized in the heating cylinder, and the temperature is set at 170-190°C. The screw rotates to mix the plasticized PVC evenly and gradually push it to the mold mouth; The plasticized PVC is injected into the mold cavity at a preset injection temperature and a preset injection pressure; Maintain the injection pressure for a while to allow the PVC material to fill the mold and cool initially. The holding time depends on the thickness and shape of the product. After the pressure holding is completed, continue to cool the toy in the mold for 20-60 seconds; After cooling is completed, open the mold and take out the molded toy; Trimming, deburring or other necessary post-processing of products; The preparation process of PVC pellets includes the following steps: According to weight, 100 parts of PVC, 10 parts of DEHCH, 10-40 parts of QPEPBSS, 3 parts of ESO and 2 parts of Ca-Zn stabilizer are mixed and stirred; after being stirred evenly, the mixture is transferred to a high-speed mixer for thorough mixing; and then placed in an oven at 80°C for pre-plasticization; After the powder becomes fluffy powder, it is transferred to a double-roll open mill for mixing at a mixing temperature of 160°C, a rotation speed of 30 rpm, and a mixing time of 1 min; then 10-40 parts of PEPBSS are added and mixing is continued for 10 min, and finally basic pelletizing is performed to obtain PVC pellets.

2. The production process of antibacterial and wear-resistant plastic toys according to claim 1, characterized in that: Injection temperature: 170-190℃.

3. The production process of antibacterial and wear-resistant plastic toys according to claim 1, characterized in that: Mould temperature: 40-60℃.

4. The production process of antibacterial and wear-resistant plastic toys according to claim 1, characterized in that: Injection pressure: 50-120MPa.

5. The production process of antibacterial and wear-resistant plastic toys according to claim 1, characterized in that: Holding time: 5-20 seconds.

6. The production process of antibacterial and wear-resistant plastic toys according to claim 1, characterized in that: The production process of antibacterial and wear-resistant plastic toys also includes the steps of grinding and polishing, grinding and polishing the surface of the finished product to remove possible burrs and rough surfaces and improve the surface finish.

7. The production process of antibacterial and wear-resistant plastic toys according to claim 1, characterized in that: The production process of antibacterial and wear-resistant plastic toys also includes the steps of spraying, spraying primer, color paint and topcoat on the toys according to design requirements to enhance the appearance.

8. The production process of antibacterial and wear-resistant plastic toys according to claim 1, characterized in that: The production process of antibacterial and wear-resistant plastic toys also includes the steps of coating, in which the toy parts are treated with coating to increase the metallic luster and protect the surface.

9. The production process of antibacterial and wear-resistant plastic toys according to claim 1, characterized in that: The production process of antibacterial and wear-resistant plastic toys also includes the steps of: parts assembly, assembling the various injection-molded parts according to the design.

10. The production process of antibacterial and wear-resistant plastic toys according to claim 1, characterized in that: The preparation process of PVC pellets comprises the following steps: mixing 100 parts of PVC, 10 parts of DEHCH, 30 parts of QPEPBSS, 3 parts of ESO and 2 parts of Ca-Zn stabilizer by weight; transferring the mixture to a high-speed mixer for thorough mixing after being stirred evenly; and then placing the mixture in an oven at 80°C for pre-plasticization; After the powder becomes fluffy powder, it is transferred to a double-roll mill for mixing at a mixing temperature of 160°C, a rotation speed of 30 rpm, and a mixing time of 1 min; then 10 parts of PEPBSS are added and mixing is continued for 10 min, and finally the basic pelletization is performed to obtain PVC pellets.