Faucet water inlet pipe inner core and preparation method thereof

Abstract

The invention provides a faucet water inlet pipe inner core and a preparation method thereof, and relates to the technical field of faucet water inlet pipe inner cores, the faucet water inlet pipe inner core comprises an inner layer and an outer layer, the outer layer is made of TPV (thermoplastic vulcanizate), and the inner layer is made of linear low density polyethylene, polypropylene and thermoplastic elastomers. By arranging the combination of the outer layer TPV (thermoplastic vulcanizate) and the inner layer linear low density polyethylene, polypropylene and thermoplastic elastomer, the aging resistance and toughness of the material are remarkably improved, and the material is ensured to be sanitary and environment-friendly and meets the drinking water standard. The outer-layer TPV material has excellent anti-aging performance, the inner-layer material provides good corrosion resistance and toughness, the thickness of the inner layer is about 0.2 mm, drinking water is effectively prevented from making contact with the outer-layer TPV material, and the possible pollution risk is avoided. The combination does not need to use a binder, natural bonding is achieved, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of faucet water inlet pipe inner cores, and in particular to a faucet water inlet pipe inner core and a preparation method thereof. Background Art

[0002] Traditional methods often use a single material or use adhesives to bond different materials together when making the inner core of the faucet water inlet pipe, resulting in poor aging resistance and hygiene. The use of a single material cannot take into account both aging resistance and toughness requirements, resulting in the product being prone to aging and breakage. The use of adhesives increases production processes and costs, and adhesive residues may pose health risks. In addition, in traditional methods, the bonding effect of the inner and outer layer materials is unstable, and stratification and falling off problems are prone to occur, which affects the service life and safety of the product and needs to be optimized and improved. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problems raised in the above background technology.

[0004] The present invention adopts the following technical solution: a faucet water inlet pipe inner core, including an inner layer and an outer layer, the material of the outer layer includes TPV (thermoplastic vulcanized rubber), and the material of the inner layer includes linear low-density polyethylene, polypropylene and thermoplastic elastomer.

[0005] Preferably, the weight ratio of the outer thermoplastic vulcanized rubber to the inner layer material is 3:1. Here, this design ensures the durability and flexibility of the pipe. The thickness of the outer layer increases the ability to resist aging and external environment, while the appropriate proportion of the inner layer material ensures its hygiene and environmental protection.

[0006] Preferably, the inner layer is composed of one or more of the following materials: linear low-density polyethylene, polypropylene and thermoplastic elastomer. Here, this flexible material selection can adjust the performance of the inner layer according to actual needs, so that the product has higher adaptability and excellent physical and chemical properties in different application scenarios.

[0007] A method for preparing an inner core of a faucet water inlet pipe comprises the following steps:

[0008] S1: Material preparation, prepare the required outer and inner layer materials;

[0009] S2: Pour TPV (thermoplastic vulcanized rubber) material, pour the outer layer TPV (thermoplastic vulcanized rubber) material into the storage container according to the required proportion, heat it to 75° in the heat storage container, and dry the raw material to remove water vapor;

[0010] S3: pouring the inner layer material into the storage container according to the required proportion, heating it to 75° in the heat storage container, drying the raw material to remove moisture, and the inner layer material can be a mixture of linear low-density polyethylene, polypropylene and thermoplastic elastomer;

[0011] S4: Heating and plasticizing, heating and plasticizing are carried out through the following plasticizing stages:

[0012] Heating and plasticizing section A; heating and plasticizing section B; heating and plasticizing section C, heating and plasticizing section D;

[0013] S5: Material mixing: In the heating and plasticizing section, the materials are fully mixed and reach the required viscosity;

[0014] S6: Extrusion molding, through an extruder and a double-layer inner tube mold, the outer layer TPV (thermoplastic vulcanized rubber) and the inner layer material are naturally bonded;

[0015] S7: Cooling and shaping, cooling and shaping the formed pipe to obtain the inner core of the faucet water inlet pipe.

[0016] Preferably, the temperature range of the heating and plasticizing section A is 190 to 200 degrees; the temperature range of the heating and plasticizing section B is 205 to 215 degrees; the temperature range of the heating and plasticizing section C is 205 to 215 degrees; the temperature range of the heating and plasticizing section D is 190 to 200 degrees. Here, the appropriate temperature of the material in different heating sections is ensured, the uniformity of the mixing process and the maintenance of material properties are guaranteed, and material degradation or insufficient performance due to improper temperature is avoided.

[0017] Preferably, the cooling and shaping process in step S7 includes the following steps:

[0018] S7.1: Cooling water tank, the extruded pipe is passed through a cooling water tank, and the water temperature is controlled between 15 and 25 degrees Celsius;

[0019] S7.2: Cooling time: The cooling time is 3 to 20 seconds to ensure that the pipe is fully cooled and shaped;

[0020] S7.3: Finished product output, the traction machine pulls out the cooled pipe;

[0021] S7.4: Quality inspection, the final quality inspection of the pipe is carried out to ensure that it meets the predetermined specifications and quality requirements. Here, the cooling and shaping process steps specify the water temperature and cooling time of the cooling water tank, as well as the quality inspection process, to ensure the stability of the pipe after forming and the high quality of the final product. Through the scientific cooling and shaping process, the physical properties of the pipe are guaranteed.

[0022] Preferably, the accumulator is an extruder, which has an independent temperature control system and can accurately control the temperature of each heating section. Here, an extruder is used with an independent temperature control system, which can accurately control the temperature of each heating section, ensuring uniform mixing and stable extrusion of materials during the extrusion process. Such equipment design improves production efficiency and consistency of product quality.

[0023] Preferably, the extrusion speed of the extruder is 10 to 20 meters per minute to ensure uniform extrusion of the material. Here, the extrusion speed range of the extruder is clarified to ensure the uniformity and continuity of the material during the extrusion process, and avoid product defects caused by improper extrusion speed. Such speed control also helps to optimize production efficiency.

[0024] Preferably, the speed of the traction machine is 10 to 20 meters per minute. Such a process ensures the final quality and durability of the pipe.

[0025] Compared with the prior art, the advantages and positive effects of the present invention are:

[0026] In the present invention, by providing an outer layer of TPV (thermoplastic vulcanized rubber) and an inner layer of linear low-density polyethylene, polypropylene and thermoplastic elastomer, the aging resistance and toughness of the material are significantly improved, and its sanitation and environmental protection are ensured to meet the drinking water standards. The outer layer of TPV (thermoplastic vulcanized rubber) material has excellent aging resistance, and the inner layer material provides good corrosion resistance and toughness. The inner layer thickness is about 0.2 mm, which effectively blocks the contact between drinking water and the outer layer of TPV (thermoplastic vulcanized rubber) material, avoiding possible pollution risks. This combination does not require the use of adhesives, and is naturally bonded, which improves production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A three-dimensional structural schematic diagram of a faucet water inlet pipe inner core and a preparation method thereof proposed by the present invention;

[0028] Figure 2 The present invention provides a schematic diagram of the overall process structure of a faucet water inlet pipe inner core and a preparation method thereof.

[0029] Legend:

[0030] 1. Inner layer; 2. Outer layer. DETAILED DESCRIPTION

[0031] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0033] Unless otherwise specified, the reagents, methods and equipment used in the present invention are conventional reagents, methods and equipment in the technical field.

[0034] Embodiment 1

[0035] The present invention provides a technical solution: a faucet water inlet pipe inner core, the material of the outer layer 2 includes TPV (thermoplastic vulcanized rubber), the material of the inner layer 1 includes linear low-density polyethylene, polypropylene and thermoplastic elastomer, the material of the outer layer 2 is TPV (thermoplastic vulcanized rubber), and the material of the inner layer 1 is a mixture of 5 parts of polypropylene and 3 parts of thermoplastic elastomer. First, put the TPV (thermoplastic vulcanized rubber) into the storage barrel of the outer layer equipment and heat it to 75 degrees to remove moisture, and then enter the extruder for heating and plasticization, and the extruder includes a heating and plasticizing section A (200°C, 10 minutes), a heating and plasticizing section B (215°C, 20 minutes), a heating and plasticizing section C (215°C, 10 minutes) and a heating section D (200°C, 5 minutes). At the same time, polypropylene and thermoplastic elastomer are mixed in a ratio of 5:3 and put into the storage barrel of the inner layer equipment to heat at 75 degrees to remove moisture, and then enter the extruder for heating and plasticization. The extruder also includes heating and plasticizing section A (200°C, 10 minutes), heating and plasticizing section B (215°C, 20 minutes), heating and plasticizing section C (215°C, 10 minutes) and heating section D (200°C, 5 minutes). Then, the two extruders are connected through a double-layer inner tube mold to extrude the inner and outer layer materials respectively so that they are naturally bonded together. The extrusion temperature is 180°C and the speed is 18 meters / minute. After the formed pipe passes through a 1-meter-long cooling water tank with a water temperature controlled at 22°C, the traction machine outputs the finished product at a speed of 18 meters / minute, and finally the quality inspection is carried out.

[0036] Embodiment 2

[0037] A faucet water inlet pipe inner core, the material of the outer layer 2 includes TPV (thermoplastic vulcanized rubber), the material of the inner layer 1 includes linear low-density polyethylene, polypropylene and thermoplastic elastomer, the material of the outer layer 2 is TPV (thermoplastic vulcanized rubber), and the material of the inner layer 1 is a mixture of 5 parts of linear low-density polyethylene and 2 parts of thermoplastic elastomer. First, the thermoplastic vulcanized rubber is placed in the storage barrel of the outer layer equipment and heated to 75 degrees to remove moisture, and then enters the extruder for heating and plasticization, wherein the heating and plasticization section A is set to a temperature of 195°C and stirred for 10 minutes, the heating and plasticization section B is set to a temperature of 210°C and stirred for 15 minutes, the heating and plasticization section C is set to a temperature of 210°C and stirred for 10 minutes, and the heating section D is set to a temperature of 195°C and heated for 5 minutes. Then, the linear low-density polyethylene and the thermoplastic elastomer are mixed in proportion and placed in the storage barrel of the inner layer equipment and heated to 75 degrees to remove moisture, and then enter the extruder for heating and plasticization, and the heating process is consistent with the outer layer equipment. Next, two extruders are connected through a double-layer inner tube mold to extrude the inner and outer layer materials respectively, with an extrusion temperature of 180°C and a speed of 17 meters per minute. After the formed pipe is cooled in a 1-meter-long cooling water tank with a water temperature of 18°C, the tractor outputs the finished product at a speed of 17 meters per minute, and finally the quality inspection is carried out.

[0038] Embodiment 3

[0039] A faucet water inlet pipe inner core, the material of the outer layer 2 includes TPV (thermoplastic vulcanized rubber), the material of the inner layer 1 includes linear low-density polyethylene, polypropylene and thermoplastic elastomer, and the outer layer 2 TPV (thermoplastic vulcanized rubber) and the inner layer 1 linear low-density polyethylene are mixed at a weight ratio of 3:1. First, the TPV (thermoplastic vulcanized rubber) is placed in the storage barrel of the outer layer equipment and heated to 75 degrees to remove moisture, and then enters the extruder for heating and plasticization, including heating and plasticization section A (195°C, 10 minutes), heating and plasticization section B (210°C, 15 minutes), heating and plasticization section C (210°C, 10 minutes) and heating section D (195°C, 5 minutes). At the same time, the linear low-density polyethylene is placed in the storage barrel of the inner layer equipment and heated to 75 degrees to remove moisture, and then enters the extruder for heating and plasticization, and the heating process is consistent with the outer layer equipment. Then, two extruders are connected through a double-layer inner tube mold to extrude the inner and outer layer materials respectively, so that they are naturally bonded together. The extrusion temperature is 180°C and the speed is 15 meters / minute. After the formed pipe passes through a 1-meter-long cooling water tank with a water temperature of 20°C, the tractor outputs the finished product at a speed of 15 meters / minute, and finally conducts quality inspection.

[0040] Embodiment 4

[0041] A faucet water inlet pipe inner core, the material of the outer layer 2 includes TPV (thermoplastic vulcanized rubber), the material of the inner layer 1 includes linear low-density polyethylene, polypropylene and thermoplastic elastomer, the outer layer 2 material is TPV (thermoplastic vulcanized rubber), and the inner layer 1 material is composed of linear low-density polyethylene, polypropylene and thermoplastic elastomer mixed in a ratio of 1:1:1. First, put the TPV (thermoplastic vulcanized rubber) into the storage barrel of the outer layer equipment and heat it to 75 degrees to remove moisture, and then enter the extruder for heating and plasticization, wherein the heating and plasticization section A is set to 200°C and stirred for 10 minutes, the heating and plasticization section B is set to 215°C and stirred for 20 minutes, the heating and plasticization section C is set to 215°C and stirred for 10 minutes, and the heating section D is set to 200°C and heated for 5 minutes. Then, the linear low-density polyethylene, polypropylene and thermoplastic elastomer are mixed in proportion and put into the storage barrel of the inner layer equipment to heat 75 degrees to remove moisture, and then enter the extruder for heating and plasticization, and the heating process is consistent with the outer layer equipment. Next, two extruders are connected through a double-layer inner tube mold to extrude the inner and outer layer materials respectively, with an extrusion temperature of 185°C and a speed of 16 m / min. After the formed pipe passes through a 1-meter-long cooling water tank with a water temperature of 20°C, the tractor outputs the finished product at a speed of 16 m / min, and finally undergoes quality inspection.

[0042] Embodiment 5

[0043] A faucet water inlet pipe inner core, the material of the outer layer 2 includes TPV (thermoplastic vulcanized rubber), the material of the inner layer 1 includes linear low-density polyethylene, polypropylene and thermoplastic elastomer, the material of the outer layer 2 is TPV (thermoplastic vulcanized rubber), and the material of the inner layer 1 is a mixture of 5 parts of linear low-density polyethylene and 1 part of polypropylene. First, the TPV (thermoplastic vulcanized rubber) is placed in the storage barrel of the outer layer equipment and heated to 75 degrees to remove moisture, and then enters the extruder for heating and plasticization. The extruder includes a heating and plasticizing section A (195°C, 10 minutes), a heating and plasticizing section B (210°C, 15 minutes), a heating and plasticizing section C (210°C, 10 minutes) and a heating section D (195°C, 5 minutes). At the same time, the linear low-density polyethylene and polypropylene are mixed in a ratio of 5:1 and placed in the storage barrel of the inner layer equipment to heat to 75 degrees to remove moisture, and then enter the extruder for heating and plasticization. The heating process of the inner layer equipment is the same as that of the outer layer equipment. Next, two extruders are connected through a double-layer inner tube mold to extrude the inner and outer layers of materials respectively, so that they are naturally bonded together. The extrusion temperature is 180°C and the speed is 14 meters per minute. After the formed pipe is placed in a 1-meter-long cooling water tank with a water temperature of 21°C, the tractor outputs the finished product at a speed of 16 meters per minute, and finally the quality inspection is carried out to ensure that it meets the predetermined specifications and quality requirements.

[0044] Embodiment 6

[0045] A faucet water inlet pipe inner core, the material of the outer layer 2 includes TPV (thermoplastic vulcanized rubber), the material of the inner layer 1 includes linear low-density polyethylene, polypropylene and thermoplastic elastomer, the material of the outer layer 2 is TPV (thermoplastic vulcanized rubber), and the material of the inner layer 1 is polypropylene. First, put the TPV (thermoplastic vulcanized rubber) into the storage barrel of the outer layer equipment and heat it to 75 degrees to remove moisture, and then enter the extruder for heating and plasticization. The equipment includes a heating and plasticizing section A (200°C, 10 minutes), a heating and plasticizing section B (215°C, 20 minutes), a heating and plasticizing section C (215°C, 10 minutes) and a heating section D (200°C, 5 minutes). At the same time, put the polypropylene into the storage barrel of the inner layer equipment and heat it to 75 degrees to remove moisture, and then enter the extruder for heating and plasticization. The heating process of the inner layer equipment is the same as that of the outer layer equipment. Next, two extruders are connected through a double-layer inner tube mold to extrude the inner and outer layers of material separately, so that they are naturally bonded together. The extrusion temperature is 185°C and the speed is 15 meters per minute. After the formed pipe passes through a cooling water tank with a water temperature of 22°C, the tractor outputs the finished product at a speed of 15 meters per minute, and finally the quality inspection is carried out to ensure that it meets the predetermined specifications and quality requirements.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A faucet water inlet pipe inner core, comprising an inner layer (1) and an outer layer (2), characterized in that: The material of the outer layer (2) includes TPV (thermoplastic vulcanized rubber), and the material of the inner layer (1) includes linear low-density polyethylene, polypropylene and thermoplastic elastomer.

2. The faucet water inlet pipe inner core according to claim 1, characterized in that: The weight ratio of the outer layer (2) TPV (thermoplastic vulcanized rubber) to the inner layer (1) material is 3:

1.

3. The faucet water inlet pipe inner core according to claim 1, characterized in that: The inner layer (1) is composed of one or more of the following materials: linear low-density polyethylene, polypropylene and thermoplastic elastomer.

4. A method for preparing the inner core of the faucet water inlet pipe according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1: Material preparation, preparing the required outer layer (2) and inner layer (1) materials; S2: pouring the outer layer (2) material, pouring the outer layer (2) TPV (thermoplastic vulcanized rubber) material into the storage container according to the required proportion, heating it to 75° in the heat storage container, and drying the raw material to remove moisture; S3: pouring the inner layer (1) material into the storage container according to the required proportion, heating the material to 75° in the heat storage container, and drying the raw material to remove moisture. The inner layer (1) material can be a mixture of linear low-density polyethylene, polypropylene and thermoplastic elastomer; S4: Heating and plasticizing, heating and mixing are carried out through the following heating and plasticizing stages: Heating and plasticizing section A; heating and plasticizing section B; heating and plasticizing section C, heating and plasticizing section D; S5: Material mixing: In the heating and plasticizing section, the materials are fully mixed and reach the required viscosity; S6: extrusion molding, through an extruder and a double-layer inner tube die, the outer layer (2) TPV (thermoplastic vulcanized rubber) and the inner layer (1) material are naturally bonded; S7: Cooling and shaping, cooling and shaping the formed pipe to obtain the inner core of the faucet water inlet pipe.

5. The method for preparing the inner core of the faucet water inlet pipe according to claim 4, characterized in that: The temperature range of the heating and plasticizing section A is 190 to 200 degrees; the temperature range of the heating and plasticizing section B is 205 to 215 degrees; the temperature range of the heating and plasticizing section C is 205 to 215 degrees; the temperature range of the heating and plasticizing section D is 190 to 200 degrees.

6. The method for preparing the inner core of the faucet water inlet pipe according to claim 4, characterized in that: The cooling and shaping process of step S7 comprises the following steps: S7.1: Cooling water tank, the extruded pipe is passed through a cooling water tank, and the water temperature is controlled between 15 and 25 degrees Celsius; S7.2: Cooling time: The cooling time is 3 to 20 seconds to ensure that the pipe is fully cooled and shaped; S7.3: Finished product output, the traction machine pulls out the cooled pipe; S7.4: Quality inspection. Finally, the pipes are inspected to ensure that they meet the predetermined specifications and quality requirements.

7. The method for preparing the inner core of the faucet water inlet pipe according to claim 4, characterized in that: The accumulator is an extruder, which has an independent temperature control system and can accurately control the temperature of each heating section.

8. The method for preparing the inner core of the faucet water inlet pipe according to claim 7, characterized in that: The extrusion speed of the extruder is 10 to 20 meters per minute to ensure uniform extrusion of the material.

9. The method for preparing the inner core of the faucet water inlet pipe according to claim 6, characterized in that: The speed of the traction machine is 10 to 20 meters per minute.

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