Residue-free plastic bottle and preparation process thereof

Abstract

The invention belongs to the field of plastic bottles, and particularly relates to a residue-free plastic bottle and a preparation process thereof.The residue-free plastic bottle comprises a plastic bottle body, the plastic bottle body comprises a bottle body, a bottle opening and a bottle bottom protrusion, the bottle opening is located at the top of the bottle body, and a bottle bottom protruding block is located at the bottom of the bottle body; the top of the bottle body is provided with a second arc-shaped transition face, the second arc-shaped transition face is connected with the corresponding bottle opening, a chamfer is arranged at the connecting position of the second arc-shaped transition face and the bottle opening, the bottom of the bottle body is provided with a first arc-shaped transition face, and the first arc-shaped transition face is connected with the corresponding bottle bottom protrusion. The bottle cap is installed on the flat opening in a threaded mode, a multi-layer sealing structure is arranged in the bottle cap and comprises a rubber sealing ring and a sealing gasket, and liquid leakage and external impurity entering are effectively prevented. According to the residue-free plastic bottle, residues of substances in the bottle can be effectively reduced, the resource utilization rate is increased, and waste is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of plastic bottles, and in particular to a residue-free plastic bottle and a preparation process thereof. Background Art

[0002] Plastic bottles are mainly used for liquid or solid disposable plastic packaging containers such as beverages, foods, pickles, cosmetics, agricultural and veterinary drugs. Plastic bottles have the characteristics of being not easy to break, low cost, high transparency, and food-grade raw materials. After searching, the patent document with the authorization announcement number CN109747137A discloses a plastic bottle and its preparation process. The preparation process of the plastic bottle includes: A. using a two-color injection molding machine to first prepare a color inner embryo; B. preparing a graphic layer on the outer wall of the color inner embryo obtained in step A; C. placing the color inner embryo obtained in step B on the mold of the two-color injection molding machine for secondary injection to prepare a transparent outer embryo, and obtaining a double-layer two-color bottle embryo; D. heating the double-layer two-color bottle embryo obtained in step C through a heating machine; E. placing the heated double-layer two-color bottle embryo in the mold of a bottle blowing machine for bottle blowing to obtain a finished bottle. The plastic bottle prepared by the preparation process of the plastic bottle provided by the present invention can avoid the corrosion of the graphic layer, improve the three-dimensional sense of the graphic of the plastic bottle, and further improve the aesthetics of the plastic bottle.

[0003] In actual use, it is found that during the use of plastic bottles on the market, residual substances in the bottles are often difficult to clean. Especially after containing some viscous liquids or powdery substances, the residual problem is more prominent. This not only causes a waste of resources, but also may have adverse effects on the environment. At the same time, the preparation process of traditional plastic bottles needs to be improved in terms of environmental protection and no residue performance. Therefore, we propose a no-residue plastic bottle and its preparation process to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a plastic bottle without residue and a preparation process thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A plastic bottle without residue, comprising a plastic bottle body, wherein the plastic bottle body comprises a bottle body, a bottle mouth and a bottle bottom bulge, wherein the bottle mouth is located on the top of the bottle body, and the bottle bottom bulge is located on the bottom of the bottle body; The top of the bottle body is provided with a second arc-shaped transition surface, the second arc-shaped transition surface is connected to the corresponding bottle mouth, and a chamfer is provided at the connection between the second arc-shaped transition surface and the bottle mouth; The bottom of the bottle body is provided with an arc-shaped transition surface 1, and the arc-shaped transition surface 1 is connected to the corresponding bottle bottom protrusion.

[0006] Preferably, it also includes a bottle cap, which is threadedly mounted on the flat mouth, and a multi-layer sealing structure is arranged inside the bottle cap, including a rubber sealing ring and a sealing gasket, which effectively prevents liquid leakage and external impurities from entering.

[0007] A process for preparing a plastic bottle without residues comprises the following steps: S1: The residue-free plastic bottle is composed of 95-98 parts of PET material; 1-2 parts of lubricant; 0.5-1 parts of antistatic agent; 0.5-1 parts of antioxidant; 3-5 parts of reinforcing material and 1-2 parts of pigment; S2: Raw material preparation: PET material, lubricant, antistatic agent, antioxidant, reinforcing material and pigment are mixed according to the formula ratio, and then screened and pretreated to remove impurities; S3: adding the raw materials in S2 to the reactor for heating and mixing, and heating the raw materials to melt; S4: adding the molten material into an extruder for melt extrusion to obtain a plastic bottle preform; S5: Test the preform obtained in S4 to ensure that the wall thickness eccentricity of the preform does not exceed 0.1mm to ensure the uniformity of the bottle body; S6: Blow molding: put the qualified preform into the blow molding mold and blow it with high-pressure gas to make it a plastic bottle with a specific shape and size; S7: Inner wall treatment: Smooth the inner wall of the plastic bottle to reduce surface tension and improve residue-free performance.

[0008] Preferably, the reinforcing material includes one or more of glass fiber or carbon fiber.

[0009] Preferably, the temperature of the extruder is 250° C.-280° C., and the pressure is 10 MPa-15 MPa.

[0010] Preferably, S5 also includes the inspection of the inside and outside of the preform, which requires the preform to be smooth inside and outside, without flash and burrs, and at the same time, the transition between the arc and the straight line of the preform should be smooth and flat.

[0011] Preferably, the pigment can be selected according to needs, and a specific color can be given to the plastic bottle by using pigments or dyes.

[0012] Beneficial effects of the present invention: 1. The use of environmentally friendly polymer materials with a specific formula improves the no-residue performance while ensuring the performance of the bottle. The added lubricant makes it easier for the contents in the bottle to flow out, the antistatic agent prevents static electricity from absorbing impurities such as dust, the antioxidant prolongs the service life of the plastic bottle, and the reinforcing material can increase the strength and rigidity of the plastic bottle.

[0013] 2. By strictly controlling the eccentricity of the wall thickness of the bottle blank, the uniformity of the bottle body is ensured and the product quality is improved.

[0014] 3. The inner wall of the plastic bottle is smoothed to make the inside of the plastic bottle smooth, with low surface tension and easy to clean, which reduces the amount of water and detergent used in the cleaning process and is more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a plastic bottle without residue proposed by the present invention; Figure 2 This is a schematic cross-sectional view of a plastic bottle without residues proposed by the present invention; Figure 3 This is a schematic diagram of the main structure of a plastic bottle without residue proposed by the present invention; Figure 4 This is a schematic side structural view of a residue-free plastic bottle proposed by the present invention.

[0016] In the figure: 1. Plastic bottle body; 2. Bottle body; 3. Bottle mouth; 4. Bottle bottom bulge; 5. Arc-shaped transition surface 1; 6. Arc-shaped filtering surface 2; 7. Chamfer. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items. Example

[0019] Reference Figure 1-4 A plastic bottle without residue comprises a plastic bottle body 1, wherein the plastic bottle body 1 comprises a bottle body 2, a bottle mouth 3 and a bottle bottom protrusion 4, wherein the bottle mouth 3 is located on the top of the bottle body 2, and the bottle bottom protrusion is located on the bottom of the bottle body 2; an arc-shaped transition surface 2 is provided on the top of the bottle body 2, and the arc-shaped transition surface 2 is connected with the corresponding bottle mouth 3, and a chamfer 7 is provided at the connection between the arc-shaped transition surface 2 and the bottle mouth 3; an arc-shaped transition surface 1 5 is provided on the bottom of the bottle body 2, and the arc-shaped transition surface 1 5 is connected with the corresponding bottle bottom protrusion 4.

[0020] In this embodiment, a bottle cap is also included. The bottle cap is threadedly installed on the flat mouth. A multi-layer sealing structure is arranged inside the bottle cap, including a rubber sealing ring and a sealing gasket, which effectively prevents liquid leakage and external impurities from entering.

[0021] A process for preparing a plastic bottle without residues comprises the following steps: S1: The plastic bottle without residue is composed of 95 parts of PET material; 1 part of lubricant; 0.5 parts of antistatic agent; 0.5 parts of antioxidant; 3 parts of reinforcing material and 1 part of pigment; S2: Raw material preparation: PET material, lubricant, antistatic agent, antioxidant, reinforcing material and pigment are mixed according to the formula ratio, and then screened and pretreated to remove impurities; S3: adding the raw materials in S2 to the reactor for heating and mixing, and heating the raw materials to melt; S4: adding the molten material into an extruder for melt extrusion to obtain a plastic bottle preform; S5: Test the preform obtained in S4 to ensure that the wall thickness eccentricity of the preform does not exceed 0.1mm to ensure the uniformity of the bottle body; S6: Blow molding: put the qualified preform into the blow molding mold and blow it with high-pressure gas to make it a plastic bottle with a specific shape and size; S7: Inner wall treatment: Smooth the inner wall of the plastic bottle to reduce surface tension and improve residue-free performance.

[0022] In this embodiment, the reinforcing material includes one or more of glass fiber or carbon fiber, the temperature of the extruder is 250°C, and the pressure is 10 MPa. S5 also includes internal and external inspection of the bottle blank, which requires the inside and outside to be smooth, without flash or burrs. At the same time, the bottle blank ensures that the transition between the arc and the straight line should be smooth and flat. The pigment can be selected according to needs, and the plastic bottle can be given a specific color by pigments or dyes. Example

[0023] Reference Figure 1-4 A plastic bottle without residue comprises a plastic bottle body 1, wherein the plastic bottle body 1 comprises a bottle body 2, a bottle mouth 3 and a bottle bottom protrusion 4, wherein the bottle mouth 3 is located on the top of the bottle body 2, and the bottle bottom protrusion is located on the bottom of the bottle body 2; an arc-shaped transition surface 2 is provided on the top of the bottle body 2, and the arc-shaped transition surface 2 is connected with the corresponding bottle mouth 3, and a chamfer 7 is provided at the connection between the arc-shaped transition surface 2 and the bottle mouth 3; an arc-shaped transition surface 1 5 is provided on the bottom of the bottle body 2, and the arc-shaped transition surface 1 5 is connected with the corresponding bottle bottom protrusion 4.

[0024] In this embodiment, a bottle cap is also included. The bottle cap is threadedly installed on the flat mouth. A multi-layer sealing structure is arranged inside the bottle cap, including a rubber sealing ring and a sealing gasket, which effectively prevents liquid leakage and external impurities from entering.

[0025] A process for preparing a plastic bottle without residues comprises the following steps: S1: The plastic bottle without residue is composed of 97 parts of PET material; 1.5 parts of lubricant; 0.8 parts of antistatic agent; 0.8 parts of antioxidant; 4 parts of reinforcing material and 1.5 parts of pigment; S2: Raw material preparation: PET material, lubricant, antistatic agent, antioxidant, reinforcing material and pigment are mixed according to the formula ratio, and then screened and pretreated to remove impurities; S3: adding the raw materials in S2 to the reactor for heating and mixing, and heating the raw materials to melt; S4: adding the molten material into an extruder for melt extrusion to obtain a plastic bottle preform; S5: Test the preform obtained in S4 to ensure that the wall thickness eccentricity of the preform does not exceed 0.1mm to ensure the uniformity of the bottle body; S6: Blow molding: put the qualified preform into the blow molding mold and blow it with high-pressure gas to make it a plastic bottle with a specific shape and size; S7: Inner wall treatment: Smooth the inner wall of the plastic bottle to reduce surface tension and improve residue-free performance.

[0026] In this embodiment, the reinforcing material includes one or more of glass fiber or carbon fiber, the temperature of the extruder is 270°C, and the pressure is 13 MPa. S5 also includes internal and external inspection of the bottle blank, which requires the inside and outside to be smooth, without flash or burrs. At the same time, the bottle blank ensures that the transition between the arc and the straight line should be smooth and flat. The pigment can be selected according to needs, and the plastic bottle can be given a specific color through pigments or dyes. Example

[0027] Reference Figure 1-4 A plastic bottle without residue comprises a plastic bottle body 1, wherein the plastic bottle body 1 comprises a bottle body 2, a bottle mouth 3 and a bottle bottom protrusion 4, wherein the bottle mouth 3 is located on the top of the bottle body 2, and the bottle bottom protrusion is located on the bottom of the bottle body 2; an arc-shaped transition surface 2 is provided on the top of the bottle body 2, and the arc-shaped transition surface 2 is connected with the corresponding bottle mouth 3, and a chamfer 7 is provided at the connection between the arc-shaped transition surface 2 and the bottle mouth 3; an arc-shaped transition surface 1 5 is provided on the bottom of the bottle body 2, and the arc-shaped transition surface 1 5 is connected with the corresponding bottle bottom protrusion 4.

[0028] In this embodiment, a bottle cap is also included. The bottle cap is threadedly installed on the flat mouth. A multi-layer sealing structure is arranged inside the bottle cap, including a rubber sealing ring and a sealing gasket, which effectively prevents liquid leakage and external impurities from entering.

[0029] A process for preparing a plastic bottle without residues comprises the following steps: S1: The plastic bottle without residue is composed of 98 parts of PET material; 2 parts of lubricant; 1 part of antistatic agent; 1 part of antioxidant; 5 parts of reinforcing material and 1 part of pigment; S2: Raw material preparation: PET material, lubricant, antistatic agent, antioxidant, reinforcing material and pigment are mixed according to the formula ratio, and then screened and pretreated to remove impurities; S3: adding the raw materials in S2 to the reactor for heating and mixing, and heating the raw materials to melt; S4: adding the molten material into an extruder for melt extrusion to obtain a plastic bottle preform; S5: Test the preform obtained in S4 to ensure that the wall thickness eccentricity of the preform does not exceed 0.1mm to ensure the uniformity of the bottle body; S6: Blow molding: put the qualified preform into the blow molding mold and blow it with high-pressure gas to make it a plastic bottle with a specific shape and size; S7: Inner wall treatment: Smooth the inner wall of the plastic bottle to reduce surface tension and improve residue-free performance.

[0030] In this embodiment, the reinforcing material includes one or more of glass fiber or carbon fiber, the temperature of the extruder is 280°C, and the pressure is 15 MPa. S5 also includes internal and external inspection of the bottle blank, which requires the inside and outside to be smooth, without flash or burrs. At the same time, the bottle blank ensures that the transition between the arc and the straight line should be smooth and flat. The pigment can be selected according to needs, and the plastic bottle can be given a specific color by pigments or dyes.

[0031] In the present invention, a specially formulated environmentally friendly polymer material is used to improve the no-residue performance while ensuring the performance of the bottle body. The added lubricant makes it easier for the material in the bottle to flow out, the antistatic agent prevents static electricity from adsorbing impurities such as dust, the antioxidant prolongs the service life of the plastic bottle, and the reinforcing material can increase the strength and rigidity of the plastic bottle.

[0032] By strictly controlling the eccentricity of the wall thickness of the bottle blank, the uniformity of the bottle body is ensured and the product quality is improved. The inner wall of the plastic bottle is smoothed to make the inside of the plastic bottle smooth, with low surface tension and easy to clean, which reduces the amount of water and detergent used in the cleaning process and is more environmentally friendly.

[0033] The above is a detailed introduction to a residue-free plastic bottle and its preparation process provided by the present invention. Specific embodiments are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A plastic bottle without residue, characterized in that: The plastic bottle body (1) comprises a bottle body (2), a bottle mouth (3) and a bottle bottom protrusion (4), wherein the bottle mouth (3) is located on the top of the bottle body (2) and the bottle bottom protrusion is located on the bottom of the bottle body (2); The top of the bottle body (2) is provided with a second arc-shaped transition surface, the second arc-shaped transition surface is connected to the corresponding bottle mouth (3), and a chamfer (7) is provided at the connection between the second arc-shaped transition surface and the bottle mouth (3); The bottom of the bottle body (2) is provided with an arc-shaped transition surface (5), and the arc-shaped transition surface (5) is connected to the corresponding bottle bottom protrusion (4).

2. A residue-free plastic bottle according to claim 1, characterized in that: Also included is a bottle cap, which is threadedly mounted on the flat mouth.

3. A residue-free plastic bottle according to claim 2, characterized in that: The bottle cap is internally provided with a multi-layer sealing structure, including a rubber sealing ring and a sealing pad, which effectively prevents liquid leakage and entry of external impurities.

4. A process for preparing a plastic bottle without residue, characterized in that: The following steps are involved: S1: The residue-free plastic bottle is composed of 95-98 parts of PET material; 1-2 parts of lubricant; 0.5-1 parts of antistatic agent; 0.5-1 parts of antioxidant; 3-5 parts of reinforcing material and 1-2 parts of pigment; S2: Raw material preparation: PET material, lubricant, antistatic agent, antioxidant, reinforcing material and pigment are mixed according to the formula ratio, and then screened and pretreated to remove impurities; S3: adding the raw materials in S2 to the reactor for heating and mixing, and heating the raw materials to melt; S4: adding the molten material into an extruder for melt extrusion to obtain a plastic bottle preform; S5: Testing the preform obtained in S4, ensuring that the eccentricity of the wall thickness of the preform does not exceed 0.1 mm to ensure the uniformity of the bottle body; S6: Blow molding: put the qualified preform into the blow molding mold and blow it with high-pressure gas to make it a plastic bottle with a specific shape and size; S7: Inner wall treatment: Smooth the inner wall of the plastic bottle to reduce surface tension and improve residue-free performance.

5. The process for preparing a plastic bottle without residue according to claim 4, characterized in that: The reinforcing material includes one or more of glass fiber or carbon fiber.

6. The process for preparing a plastic bottle without residue according to claim 4, characterized in that: The temperature of the extruder is 250° C.-280° C., and the pressure is 10 MPa-15 MPa.

7. The process for preparing a plastic bottle without residue according to claim 4, characterized in that: The S5 also includes the inspection of the inside and outside of the preform, which requires the inside and outside to be smooth, without flash and burrs. At the same time, the transition between the arc and the straight line of the preform should be smooth and flat.

8. The process for preparing a plastic bottle without residue according to claim 4, characterized in that: The pigment can be selected according to needs, and a specific color can be given to the plastic bottle through pigments or dyes.

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