CN105333235B - A kind of antibacterial kitchen and bath pipe production technology - Google Patents

Abstract

An antibacterial kitchen and bathroom pipe and its production process. The antibacterial kitchen and bathroom pipe is composed of three layers. The outer layer is a polypropylene layer, the middle layer is a reinforcement layer, and the inner layer is an antibacterial layer. The production process steps are: A. Three layers Co-extrusion: The three-layer raw materials are sent to the outer layer extruder, the middle layer extruder and the inner layer extruder respectively, and after mixing, they are co-extruded at one time; Three stages of temperature setting, heating for a stable stage, and then proceeding to the next stage, B. Shaping water cooling: the above-mentioned one-time co-extruded pipe is shaped by a pipe vacuum shaping machine, and the vacuum degree of the pipe vacuum shaping machine is controlled at -0.35—5MPa ; Then enter the vacuum water cooling box for cooling. Advantages: 1. The antibacterial layer contains silver-loaded zirconium phosphate as a non-eluting antibacterial agent, and the antibacterial effect is durable, high temperature resistant, and stable. 2. The quality is good and strong, the appearance is beautiful, the inner and outer walls of the pipe are smooth, no scale, and the heat resistance is more excellent.

Description

A production process of antibacterial kitchen and bathroom pipe

technical field

The invention relates to a kitchen and bathroom pipe and a production process.

Background technique

Some of the kitchen and bathroom pipe products produced by the existing antibacterial kitchen and bathroom pipe production technology are not good enough, and some do not have antibacterial function.

Contents of the invention

The purpose of the present invention is to provide a production process for antibacterial kitchen and bathroom pipes in view of the lack of good product quality and no antibacterial function of the kitchen and bathroom pipes produced by the existing antibacterial kitchen and bathroom pipe production process.

The antibacterial kitchen and bathroom pipe is composed of three layers, the outer layer is a polypropylene layer, the middle layer is a reinforcement layer, and the inner layer is an antibacterial layer.

Its production process steps are:

Three-layer co-extrusion: The three-layer raw materials are sent to the outer layer extruder, the middle layer extruder and the inner layer extruder respectively. After mixing, they are co-extruded at one time; Carry out 3 staged temperature settings, heat for a stable stage, and then proceed to the next stage; for the first heating for 1 hour, the temperature in zone 1 of the outer layer extruder, middle layer extruder and inner layer extruder is 75 -85°C, 100-120°C in zone 2-5, 75-85°C in zone 1 of the co-extrusion machine, 100-120°C in zone 2-3, 100-120°C in zone 1-5 of the mold; Warm for 1 hour, the temperature of the outer layer extruder, the middle layer extruder and the inner inner layer extruder is 110-130°C in zone 1, the temperature in zone 2-5 is 140-160°C, the temperature in zone 1 of the co-extrusion machine is 110-130°C , the temperature in zone 2-3 is 140-160°C, the temperature in zone 1-5 of the mold is 140-160°C; the third heating time is 1 hour, the temperature in zone 1 of the outer layer extruder is 135-145°C, and the temperature in zone 2 is 170-190°C , Zone 3-4 temperature 190-200°C, zone 5 temperature 185-195°C, middle layer extruder zone 1 temperature 140-160°C, zone 2 temperature 170-190°C, zone 3-4 temperature 180-200°C, 5 Zone temperature 180-190°C, inner layer extruder zone 1 temperature 125-135°C, zone 2 temperature 160-180°C, zone 3-4 temperature 170-190°C, zone 5 temperature 170-180°C, co-extruder 1 Zone temperature 165-175℃, zone 2 temperature 175-185℃, zone 3 temperature 180-200℃, mold zone 1 temperature 180-190℃, zone 2-4 temperature 180-200℃, zone 5 temperature 175-185℃ or 180-190°C;

Best practice:

Three-layer co-extrusion: The three-layer raw materials are sent to the outer layer extruder, the middle layer extruder and the inner layer extruder respectively. After mixing, they are co-extruded at one time; Carry out 3 staged temperature settings, heat for a stable stage, and then proceed to the next stage; for the first heating for 1 hour, the temperature of the outer layer extruder, the middle layer extruder and the inner layer extruder in Zone 1 is 80 ℃, the temperature in zone 2-5 is 110℃, the temperature in zone 1 of the co-extrusion machine is 80℃, the temperature in zone 2-3 is 110℃, the temperature in zone 1-5 of the mold is 110℃; the second heating is 1 hour, the outer extruder, The temperature of zone 1 of the middle layer extruder and the inner layer extruder is 120°C, the temperature of zone 2-5 is 150°C, the temperature of zone 1 of the co-extrusion machine is 120°C, the temperature of zone 2-3 is 150°C, the temperature of zone 1-5 of the mold is 150°C ℃; the third heating time is 1 hour, the temperature of zone 1 of the outer layer extruder is 140°C, the temperature of zone 2 is 180°C, the temperature of zone 3-4 is 195°C, the temperature of zone 5 is 190°C, the temperature of zone 1 of the middle layer extruder is 150°C , Zone 2 temperature 180°C, zone 3-4 temperature 190°C, zone 5 temperature 185°C, inner layer extruder zone 1 temperature 130°C, zone 2 temperature 170°C, zone 3-4 temperature 180°C, zone 5 temperature 175 ℃, the temperature of zone 1 of the co-extrusion machine is 170°C, the temperature of zone 2 is 180°C, the temperature of zone 3 is 190°C, the temperature of zone 1 of the mold is 185°C, the temperature of zone 2-4 is 190°C, the temperature of zone 5 is 180°C or 185°C;

The advantages of the present invention are:

1. The antibacterial layer contains silver-loaded zirconium phosphate as a non-eluting antibacterial agent, and the antibacterial effect is durable, high temperature resistant, and stable. Heat resistance temperature ≤1300℃, not sensitive to ultraviolet radiation, no corrosion to various metal materials, no electric corrosion, no volatilization, no chemical reaction with most substances, it has high antibacterial performance, safe, non-toxic, non-irritating, green Environmentally friendly and pollution-free (the antibacterial performance is more than 10 times higher than that of zinc, copper and other materials). The special raw material base material for kitchen and bathroom pipes is a high melt viscosity, semi-crystalline material, which is difficult to process during processing, especially when producing thick-walled pipes. Pipes are prone to stress concentration, surface depressions, shrinkage cavities, and severe melt flow marks. The key process control points are as follows:

2. Due to the use of multi-machine co-extrusion, segmental heating, and the core extrusion mechanism of "low temperature and low pressure", that is, under the premise of sufficient plasticization, the processing temperature is reduced as much as possible, so as to ensure a lower melt temperature. The quality is good and strong, the appearance is beautiful, the inner and outer walls of the pipe are smooth, no scale, and the heat resistance is more excellent.

3. Adopt the "high temperature quenching" process, and set the cooling water temperature in sections to ensure the appearance, structure and size of the product. Temperature control, according to different ambient temperatures, the cooling water temperature of each cooling water tank is set in gradients, and different temperature sections are used for cooling. While ensuring the accurate adjustability of the size, it is also crucial to the quality of the product. .

detailed description

The antibacterial kitchen and bathroom pipe is composed of three layers, the outer layer is a polypropylene layer, the middle layer is a reinforcement layer, and the inner layer is an antibacterial layer. The production process steps are:

A. Three-layer co-extrusion: After the three-layer raw materials are sent to the outer layer extruder, the middle layer extruder and the inner layer extruder for mixing, they are co-extruded at one time; When starting up and heating up, set the temperature in stages for 3 times, heat for a stable period, and then proceed to the next period; the first heating is 1 hour, the outer layer extruder, the middle layer extruder and the inner layer extruder 1 zone The temperature is 75-85°C, the temperature in zone 2-5 is 100-120°C, the temperature in zone 1 of the co-extrusion machine is 75-85°C, the temperature in zone 2-3 is 100-120°C, the temperature in zone 1-5 of the mold is 100-120°C; Heating for 1 hour, the temperature of the outer layer extruder, the middle layer extruder and the inner layer extruder in zone 1 is 110-130°C, the temperature in zone 2-5 is 140-160°C, and the temperature in zone 1 of the co-extrusion machine is 110- 130°C, 140-160°C in zone 2-3, 140-160°C in zone 1-5 of the mold; 1 hour for the third heating, 135-145°C in zone 1 of the outer layer extruder, 170-170 in zone 2 190°C, temperature in zone 3-4 190-200°C, temperature in zone 5 185-195°C, temperature in zone 1 of the middle layer extruder 140-160°C, temperature in zone 2 170-190°C, temperature in zone 3-4 180-200°C , Zone 5 temperature 180-190°C, inner layer extruder zone 1 temperature 125-135°C, zone 2 temperature 160-180°C, zone 3-4 temperature 170-190°C, zone 5 temperature 170-180°C, co-extrusion The temperature in zone 1 of the machine is 165-175°C, the temperature in zone 2 is 175-185°C, the temperature in zone 3 is 180-200°C, the temperature in zone 1 of the mold is 180-190°C, the temperature in zone 2-4 is 180-200°C, the temperature in zone 5 is 175-185°C °C, the temperature in zone 5 is 180-190 °C;

B. Shaping water cooling: The above-mentioned one-time co-extruded pipe is shaped by a pipe vacuum shaping machine, and the vacuum degree of the pipe vacuum shaping machine is controlled at -0.35—5MPa; then it is cooled in a vacuum water cooling box, and the vacuum degree of the vacuum water cooling box is controlled at -0.4—0.45MPa, the cooling time is 1-2min, the water temperature is controlled at 35--40°C; then enter the first section of cooling water tank cooling, the water temperature is controlled at 30--35°C, the cooling time is 1-2min; then enter the second section The cooling water tank is cooled, the water temperature is controlled at 25-30°C, and the cooling time is 1-2min;

C. Marking, traction, cut-to-length, packaging.

Claims (1)

1. A production process for antibacterial kitchen and bathroom pipes. Antibacterial kitchen and bathroom pipes are composed of three layers. The outer layer is a polypropylene layer, the middle layer is a reinforcement layer, and the inner layer is an antibacterial layer. It is characterized in that its production process steps are: A． Three-layer co-extrusion: The three-layer raw materials are sent to the outer layer extruder, the middle layer extruder and the inner layer extruder respectively. After mixing, they are co-extruded at one time; Carry out 3 staged temperature settings, heat for a stable stage, and then proceed to the next stage; for the first heating for 1 hour, the temperature of the outer layer extruder, the middle layer extruder and the inner layer extruder in Zone 1 is 80 ℃, the temperature in zone 2-5 is 110℃, the temperature in zone 1 of the co-extrusion machine is 80℃, the temperature in zone 2-3 is 110℃, the temperature in zone 1-5 of the mold is 110℃; the second heating is 1 hour, the outer extruder, The temperature of zone 1 of the middle layer extruder and the inner layer extruder is 120°C, the temperature of zone 2-5 is 150°C, the temperature of zone 1 of the co-extrusion machine is 120°C, the temperature of zone 2-3 is 150°C, the temperature of zone 1-5 of the mold is 150°C ℃; the third heating for 1 hour, the temperature of zone 1 of the outer layer extruder is 140°C, the temperature of zone 2 is 180°C, the temperature of zone 3-4 is 195°C, the temperature of zone 5 is 190°C, the temperature of zone 1 of the middle layer extruder is 150°C , Zone 2 temperature 180°C, zone 3-4 temperature 190°C, zone 5 temperature 185°C, inner layer extruder zone 1 temperature 130°C, zone 2 temperature 170°C, zone 3-4 temperature 180°C, zone 5 temperature 175 ℃, the temperature of zone 1 of the co-extrusion machine is 170°C, the temperature of zone 2 is 180°C, the temperature of zone 3 is 190°C, the temperature of zone 1 of the mold is 185°C, the temperature of zone 2-4 is 190°C, the temperature of zone 5 is 180°C or 185°C; B. Shaping water cooling: The above-mentioned one-time co-extruded pipe is shaped by a pipe vacuum shaping machine, and the vacuum degree of the pipe vacuum shaping machine is controlled at -0.35—5MPa; then it is cooled in a vacuum water cooling box, and the vacuum degree of the vacuum water cooling box is controlled at -0.4—0.45MPa, the cooling time is 1-2min, the water temperature is controlled at 35--40°C; then enter the first section of cooling water tank cooling, the water temperature is controlled at 30--35°C, the cooling time is 1-2min; then enter the second section The cooling water tank is cooled, the water temperature is controlled at 25-30°C, and the cooling time is 1-2min; C. Marking, traction, cut-to-length, packaging.