阅读说明：本技术 U-pvc异型材和改性tpe胶条软硬共挤一步成型的方法 (Soft-hard co-extrusion one-step forming method for U-PVC profiled bar and modified TPE adhesive tape ) 是由 刘鲁亮 信宏波 聂辉 张丽颖 张志阳 于 2019-09-30 设计创作，主要内容包括：本发明公开了一种U-PVC异型材和改性TPE胶条软硬共挤一步成型的方法,包括如下步骤：U-PVC异型材挤出成型；改性TPE粒料加入共挤出机喂料料筒内,共挤出机料筒温度控制在160～175℃、口模温度控制在190～210℃；d)将打开连接在共挤出机软料模具上的热风枪,控制热风枪温度180～220℃,控制风压0.1～0.5MPa；已冷却成型的U-PVC异型材的凹槽与具有一定截面形状的软料模具的卡槽相衔接,共挤机主机螺杆转速控制在25～35rpm,熔融的改性TPE胶条在挤出压力作用下保持一定的尺寸与硬质U-PVC异型材黏结；挤出软硬一体的异型材在牵引机的牵引下继续通过水箱真空吸附冷却定型；本发明在减少了门窗组装过程中胶条的后穿工序的同时提高了密封胶条的耐老化性能。(the invention discloses a soft and hard co-extrusion one-step forming method of a U-PVC profiled bar and a modified TPE adhesive tape, which comprises the following steps: extruding and molding the U-PVC profiled bar; adding the modified TPE granules into a feeding cylinder of a co-extruder, controlling the temperature of the cylinder of the co-extruder to be 160-175 ℃, and controlling the temperature of a neck mold to be 190-210 ℃; d) opening a hot air gun connected to a soft material die of the co-extruder, controlling the temperature of the hot air gun to be 180-220 ℃ and controlling the air pressure to be 0.1-0.5 MPa; the groove of the cooled and formed U-PVC profiled bar is connected with a clamping groove of a soft material die with a certain section shape, the rotating speed of a screw of a main extruder is controlled to be 25-35rpm, and the molten modified TPE adhesive tape keeps a certain size under the action of extrusion pressure to be bonded with the hard U-PVC profiled bar; extruding the soft and hard integrated profiled bars, and continuously cooling and shaping the extruded soft and hard integrated profiled bars through vacuum adsorption of a water tank under the traction of a traction machine; the invention reduces the post-penetrating process of the adhesive tape in the door and window assembling process and improves the aging resistance of the sealing adhesive tape.)

1. A soft and hard co-extrusion one-step forming method for U-PVC profiled bars and modified TPE adhesive tapes is characterized by comprising the following steps:

a) Extruding and molding the U-PVC profiled bar;

b) After extrusion molding of the U-PVC profiled bar, cooling the U-PVC profiled bar by a water tank and then drying the U-PVC profiled bar by a hot air device;

c) Adding the modified TPE granules into a feeding cylinder of a co-extruder, controlling the temperature of the cylinder of the co-extruder to be 160-175 ℃, and controlling the temperature of a neck mold to be 190-210 ℃;

d) Opening a hot air gun connected to a soft material die of the co-extruder, controlling the temperature of the hot air gun to be 180-220 ℃ and controlling the air pressure to be 0.1-0.5 MPa;

e) The groove of the cooled and formed U-PVC profiled bar is connected with a clamping groove of a soft material die with a certain section shape, the rotating speed of a screw of a main extruder is controlled to be 25-35rpm, and the molten modified TPE adhesive tape keeps a certain size under the action of extrusion pressure to be bonded with the hard U-PVC profiled bar;

f) Extruding the soft and hard integrated profiled bars, and continuously cooling and shaping the extruded soft and hard integrated profiled bars through vacuum adsorption of a water tank under the traction of a traction machine;

g) The extrusion length of the soft and hard integrated profiled bar is synchronously cut by a cutting machine, and the soft and hard integrated profiled bar is cut to length according to the length requirement.

2. The method for soft and hard co-extrusion one-step forming of the U-PVC profiled bar and the modified TPE rubber strip as claimed in claim 1, wherein: the modified TPE adhesive tape consists of 100 parts of TPE matrix, 0-30 parts of blending modified polymer and 0.3-0.5 part of antioxidant.

3. the method for soft and hard co-extrusion one-step forming of the U-PVC profiled bar and the modified TPE rubber strip as claimed in claim 2, wherein: the TPE matrix is one or a mixture of a plurality of polyethylene elastomer, polypropylene elastomer, styrene-butadiene triblock copolymer (SBS) and hydrogenated copolymer (SEBS) thereof, styrene-pentadiene triblock copolymer (SIS) and hydrogenated copolymer (SEPS) thereof.

4. the method for soft and hard co-extrusion one-step forming of the U-PVC profiled bar and the modified TPE rubber strip as claimed in claim 3, wherein: the blending modified polymer is one or a mixture of more of Chlorinated Polyethylene (CPE), ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA) and ethylene-vinyl acetate-carbonyl (EMA) copolymer.

5. The method for soft and hard co-extrusion one-step forming of the U-PVC profiled bar and the modified TPE rubber strip as claimed in claim 1, wherein: the U-PVC profiled bar comprises PVC, calcium carbonate, titanium dioxide, stearic acid, a plasticizer, an impact modifier and a stabilizer, wherein the mass parts of the components are based on PVC: 100 parts of PVC, 15-25 parts of calcium carbonate, 4-10 parts of titanium dioxide, 0.1-0.5 part of stearic acid, 5-15 parts of plasticizer, 3-8 parts of stabilizer and 0.3-1.5 parts of impact modifier.

6. The method for soft and hard co-extrusion one-step forming of the U-PVC profiled bar and the modified TPE rubber strip as claimed in claim 2, wherein the preparation method of the modified PTE is as follows:

mixing a TPE matrix, a blending modified polymer and an antioxidant according to a certain mass ratio, then carrying out hot mixing and stirring for 15-20 minutes at the temperature of 115-120 ℃, then putting the mixture into a cold mixing pot, and carrying out extrusion granulation on the mixed material at the temperature of 210-240 ℃ by using a double-screw extrusion granulator to obtain the modified TPE granules.

7. The method for soft and hard co-extrusion one-step forming of the U-PVC profile and the modified TPE rubber strip according to claim 1, is characterized in that the preparation method of the U-PVC profile comprises the following steps:

PVC, calcium carbonate, titanium dioxide, stearic acid, a plasticizer, an impact modifier and a stabilizer are subjected to hot mixing at 110-120 ℃ according to certain mass parts, and then the clinker obtained after cold mixing at 45-55 ℃ is directly put into a double-screw extruder for processing, plasticizing and molding.

8. The method for soft and hard co-extrusion one-step forming of the U-PVC profiled bar and the modified TPE rubber strip as claimed in claim 7, wherein the temperature of a cylinder of the double screw extruder is 180-200 ℃, the temperature of a head of the double screw extruder is 190-210 ℃, the rotating speed of a main machine is controlled at 25-35rpm, the U-PVC profiled bar with a specific shape is formed through a die, and the U-PVC profiled bar and the modified TPE rubber strip are formed through vacuum adsorption and cooling through a water tank under the traction of a traction machine.

9. the method for soft and hard co-extrusion one-step forming of the U-PVC profiled bar and the modified TPE rubber strip as claimed in claim 1, wherein the co-extruder is a single screw extruder.

Technical Field

The invention relates to a soft and hard co-extrusion one-step forming method for a U-PVC profiled bar and a modified TPE adhesive tape, belonging to the technical field of plastic processing.

background

U-PVC profile shapes door and window flexible glue strip that present market supplied adopts two kinds of forms usually, one kind adopts the rubber material, usually through mechanical embedding mode, solves between the door and window frame fan and the sealed between fan and glass, and this kind of assembly belongs to secondary operation. The sealing effect of the door and window is affected by the defects that the sealing rubber strip is partially stretched unevenly and easily falls off in the subsequent use process, one method is to adopt a PVC rubber strip, the sealing rubber strip and the profiled bar are extruded together (front co-extrusion or rear co-extrusion) in the currently and commonly adopted mode, and the assembly between the sealing rubber strip and the profiled bar is completed by one-step processing. Therefore, a soft and hard co-extrusion one-step forming method of the U-PVC profiled bar and the modified TPE rubber strip is provided.

Disclosure of Invention

The invention mainly aims to provide a soft and hard co-extrusion one-step forming method for U-PVC profiled bars and modified TPE adhesive tapes, which can effectively solve the problems in the background technology.

in order to achieve the purpose, the invention adopts the technical scheme that:

a soft and hard co-extrusion one-step forming method for U-PVC profiled bars and modified TPE adhesive tapes comprises the following steps:

a) Extruding and molding the U-PVC profiled bar;

b) After extrusion molding of the U-PVC profiled bar, cooling the U-PVC profiled bar by a water tank and then drying the U-PVC profiled bar by a hot air device;

c) adding the modified TPE granules into a feeding cylinder of a co-extruder, controlling the temperature of the cylinder of the co-extruder to be 160-175 ℃, and controlling the temperature of a neck mold to be 190-210 ℃;

d) Opening a hot air gun connected to a soft material die of the co-extruder, controlling the temperature of the hot air gun to be 180-220 ℃ and controlling the air pressure to be 0.1-0.5 MPa;

e) The groove of the cooled and formed U-PVC profiled bar is connected with a clamping groove of a soft material die with a certain section shape, the rotating speed of a screw of a main extruder is controlled to be 25-35rpm, and the molten modified TPE adhesive tape keeps a certain size under the action of extrusion pressure to be bonded with the hard U-PVC profiled bar;

f) Extruding the soft and hard integrated profiled bars, and continuously cooling and shaping the extruded soft and hard integrated profiled bars through vacuum adsorption of a water tank under the traction of a traction machine;

g) The extrusion length of the soft and hard integrated profiled bar is synchronously cut by a cutting machine, and the soft and hard integrated profiled bar is cut to length according to the length requirement.

Further, the modified TPE adhesive tape consists of 100 parts of TPE matrix, 0-30 parts of blending modified polymer and 0.3-0.5 part of antioxidant.

Furthermore, the TPE matrix is one or a mixture of a plurality of polyethylene-based elastomers, polypropylene-based elastomers, styrene-butadiene triblock copolymers (SBS) and hydrogenated copolymers (SEBS) thereof, and styrene-pentadiene triblock copolymers (SIS) and hydrogenated copolymers (SEPS) thereof.

further, the blending modified polymer is one or a mixture of several of Chlorinated Polyethylene (CPE), ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA) and ethylene-vinyl acetate-carbonyl (EMA) copolymer.

further, it is characterized in that: the U-PVC profiled bar comprises PVC, calcium carbonate, titanium dioxide, stearic acid, a plasticizer, an impact modifier and a stabilizer, wherein the mass parts of the components are based on PVC: 100 parts of PVC, 15-25 parts of calcium carbonate, 4-10 parts of titanium dioxide, 0.1-0.5 part of stearic acid, 5-15 parts of plasticizer, 3-8 parts of stabilizer and 0.3-1.5 parts of impact modifier.

Further, the preparation method of the modified PTE comprises the following steps:

Mixing a TPE matrix, a blending modified polymer and an antioxidant according to a certain mass ratio, then carrying out hot mixing and stirring for 15-20 minutes at the temperature of 115-120 ℃, then putting the mixture into a cold mixing pot, and carrying out extrusion granulation on the mixed material at the temperature of 210-240 ℃ by using a double-screw extrusion granulator to obtain the modified TPE granules.

further, the preparation method of the U-PVC profiled bar comprises the following steps:

PVC, calcium carbonate, titanium dioxide, stearic acid, a plasticizer, an impact modifier and a stabilizer are subjected to hot mixing at 110-120 ℃ according to certain mass parts, and then the clinker obtained after cold mixing at 45-55 ℃ is directly put into a double-screw extruder for processing, plasticizing and molding.

furthermore, the temperature of a charging barrel of the double-screw extruder is 180-200 ℃, the temperature of a machine head is 190-210 ℃, the rotating speed of a main machine is controlled at 25-35rpm, a U-PVC profiled bar with a specific shape is formed through a die, and the U-PVC profiled bar is formed through vacuum adsorption and cooling by a water tank under the traction of a traction machine.

further, the co-extruder is a single screw extruder.

The adhesive tape of the modified TPE prepared by the invention does not need subsequent processing, and the sealing adhesive tape is directly combined with a hard unplasticized polyvinyl chloride (U-PVC) profiled bar in a co-extrusion mode, so that the post-penetrating procedure of the adhesive tape in the door and window assembling process is reduced, and the aging resistance of the sealing adhesive tape is improved.

Detailed Description

in order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

the embodiment provides a soft and hard co-extrusion one-step forming method for U-PVC profiled bars and modified TPE adhesive tapes, which comprises the following steps:

a) Extruding and molding the U-PVC profiled bar;

b) after extrusion molding of the U-PVC profiled bar, cooling the U-PVC profiled bar by a water tank and then drying the U-PVC profiled bar by a hot air device;

c) adding the modified TPE granules into a feeding cylinder of a co-extruder, controlling the temperature of the cylinder of the co-extruder to be 160-175 ℃, and controlling the temperature of a neck mold to be 190-210 ℃;

d) opening a hot air gun connected to a soft material die of the co-extruder, controlling the temperature of the hot air gun to be 180-220 ℃ and controlling the air pressure to be 0.1-0.5 MPa;

e) the groove of the cooled and formed U-PVC profiled bar is connected with a clamping groove of a soft material die with a certain section shape, the rotating speed of a screw of a main extruder is controlled to be 25-35rpm, and the molten modified TPE adhesive tape keeps a certain size under the action of extrusion pressure to be bonded with the hard U-PVC profiled bar;

f) Extruding the soft and hard integrated profiled bars, and continuously cooling and shaping the extruded soft and hard integrated profiled bars through vacuum adsorption of a water tank under the traction of a traction machine;

g) The extrusion length of the soft and hard integrated profiled bar is synchronously cut by a cutting machine, and the soft and hard integrated profiled bar is cut to length according to the length requirement.

Further, the modified TPE adhesive tape consists of 100 parts of TPE matrix, 0-30 parts of blending modified polymer and 0.3-0.5 part of antioxidant.

furthermore, the TPE matrix is one or a mixture of a plurality of polyethylene-based elastomers, polypropylene-based elastomers, styrene-butadiene triblock copolymers (SBS) and hydrogenated copolymers (SEBS) thereof, and styrene-pentadiene triblock copolymers (SIS) and hydrogenated copolymers (SEPS) thereof.

Further, the blending modified polymer is one or a mixture of several of Chlorinated Polyethylene (CPE), ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA) and ethylene-vinyl acetate-carbonyl (EMA) copolymer.

Further, it is characterized in that: the U-PVC profiled bar comprises PVC, calcium carbonate, titanium dioxide, stearic acid, a plasticizer, an impact modifier and a stabilizer, wherein the mass parts of the components are based on PVC: 100 parts of PVC, 15-25 parts of calcium carbonate, 4-10 parts of titanium dioxide, 0.1-0.5 part of stearic acid, 5-15 parts of plasticizer, 3-8 parts of stabilizer and 0.3-1.5 parts of impact modifier.

further, the preparation method of the modified PTE comprises the following steps:

Mixing a TPE matrix, a blending modified polymer and an antioxidant according to a certain mass ratio, then carrying out hot mixing and stirring for 15-20 minutes at the temperature of 115-120 ℃, then putting the mixture into a cold mixing pot, and carrying out extrusion granulation on the mixed material at the temperature of 210-240 ℃ by using a double-screw extrusion granulator to obtain the modified TPE granules.

further, the preparation method of the U-PVC profiled bar comprises the following steps:

PVC, calcium carbonate, titanium dioxide, stearic acid, a plasticizer, an impact modifier and a stabilizer are subjected to hot mixing at 110-120 ℃ according to certain mass parts, and then the clinker obtained after cold mixing at 45-55 ℃ is directly put into a double-screw extruder for processing, plasticizing and molding.

Furthermore, the temperature of a charging barrel of the double-screw extruder is 180-200 ℃, the temperature of a machine head is 190-210 ℃, the rotating speed of a main machine is controlled at 25-35rpm, a U-PVC profiled bar with a specific shape is formed through a die, and the U-PVC profiled bar is formed through vacuum adsorption and cooling by a water tank under the traction of a traction machine.

further, the co-extruder is a single screw extruder.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.