TPE soft rubber head hose

Abstract

The application discloses a TPE soft glue head hose, which comprises a pipe body and a injection head; the pipe body is a five-layer co-extrusion structure, and from outside to inside, the five-layer co-extrusion structure comprises an outer layer, a first adhesive layer, an ethylene barrier layer, a second adhesive layer and an inner layer; a hanging table and a buckle position are arranged at the top of the pipe body; the injection head is integrally formed with the pipe body through a mold and a segmented injection process, and the injection head is made of TPE material; the TPE soft glue head hose improves the touch feeling by adopting the TPE injection head, and the five-layer co-extrusion process optimizes the barrier property and the production yield; meanwhile, the segmented injection molding is combined with the pipe body structure, so that the TPE / PE heterogeneous material interface bonding strength problem is solved.

Description

Technical Field

[0001] This invention relates to the field of hose technology, and more specifically to a TPE soft rubber head hose. Background Technology

[0002] Due to its portability and sealing advantages, soft tube packaging is widely used in cosmetics, pharmaceuticals and other fields. Traditional soft tubes are mostly made of polyethylene (PE) material in one piece, and their injection head is usually a rigid PE structure, which has significant defects: (1) poor tactile experience: rigid injection head is hard and cold when in contact with the skin, especially for products such as face cream and lotion that need to be squeezed directly onto the skin, which reduces the user experience; (2) difficulty in bonding heterogeneous materials: if soft thermoplastic elastomer (TPE) is used in the injection head to improve the tactile experience, due to the difference in molecular structure and melting temperature between TPE and PE, traditional injection molding process is prone to delamination or detachment of the bonding interface.

[0003] Therefore, there is an urgent need to develop a hose structure that combines a skin-friendly feel, high barrier properties, reliable one-piece molding of heterogeneous materials, and is suitable for efficient production. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a TPE soft rubber head hose. This TPE soft rubber head hose improves the tactile feel by using a TPE injection head, optimizes barrier properties and production yield through a five-layer co-extrusion process, and solves the problem of interfacial bonding strength between TPE / PE heterogeneous materials by combining segmented injection molding with the hose body structure.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A TPE soft rubber head hose includes a tube body and an injection head. The tube body comprises, from the outside to the inside, an outer layer, a first adhesive layer, a barrier layer, a second adhesive layer, and an inner layer. The injection head is made of TPE material. The preparation method of TPE soft rubber head tube is as follows: S1. Raw material drying: Place the raw material in the tube body and injection head into the hot air hopper and dry for 3 hours at a temperature of 110℃-120℃. S2. Tube body forming: The tube body raw material is added to the extrusion equipment, and after plasticizing, extrusion molding, cooling and shaping and traction cutting, the tube body is finally formed. S3. Injection head forming: The tube body is placed in the forming mold, and the injection head is formed on the top of the tube body by segmented injection, so that the injection head and the tube body are formed as one piece.

[0006] Furthermore, during the segmented injection molding process, the pressure of the first segment is 21 Bar, the speed is 18%, and the time is 1.85 s; the pressure of the second segment is 20 Bar, the speed is 18%, and the time is 0.41 s; the pressure of the third segment is 20 Bar, the speed is 18%, and the time is 0.54 s; and the holding time is 4 s.

[0007] Furthermore, the top of the tube body is provided with a mounting platform and a fastening position, and the injection head is located at the mounting platform and fastening position and is integrally formed with the tube body.

[0008] In further step S2, during the extrusion molding of the tube body, the molding temperature of the inner and outer layers is 150-180℃, the molding temperature of the barrier layer is 170-190℃, the temperature of the adhesive layer is 160-180℃, the extrusion speed of the outer layer is 900-1000 rpm, the extrusion speed of the barrier layer is 500-600 rpm, the extrusion speed of the adhesive layer is 850-1000 rpm, and the extrusion speed of the inner layer is 1000-1100 rpm.

[0009] Furthermore, the barrier layer is made of ethylene-vinyl alcohol copolymer.

[0010] Furthermore, both the outer and inner layers are made of polyethylene.

[0011] Furthermore, both the first adhesive layer and the second adhesive layer are made of maleic anhydride-modified polyolefin.

[0012] Furthermore, during the injection molding process, the melt temperature is 193-227℃ and the mold temperature is 16-38℃.

[0013] Furthermore, the injection head shape is one of the following: round, elliptical, square, rectangular, triangular, or irregular.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. Significantly improves the user experience The injection head uses soft TPE material instead of traditional rigid PE, which is soft and skin-friendly, making it especially suitable for cosmetics and other applications that come into direct contact with the skin.

[0015] 2. Breakthrough in the technology barrier of integral molding of heterogeneous materials A pioneering and reliable combination of PE pipe body and TPE injection head: By using a segmented injection molding process (segment 1: 21 Bar / 18% / 1.85s; segment 2: 20 Bar / 18% / 0.41s; segment 3: 20 Bar / 18% / 0.54s; holding pressure 4s), the matching between the TPE injection temperature (193–227℃) and the PE melt temperature (150–180℃) is precisely controlled, overcoming material compatibility issues. 3. Enhance structural reliability The top of the pipe is designed with a mounting platform and a fastener to increase the contact area between the TPE injection head and the PE pipe body, thereby improving the bonding strength between the dissimilar materials and eliminating the risk of detachment.

[0016] 4. Balancing high barrier properties with production efficiency Five-layer co-extruded tube structure (outer layer / adhesive layer / barrier layer / adhesive layer / inner layer): The barrier layer effectively isolates oxygen and protects the contents; The adhesive layer (maleic anhydride modified polyolefin) ensures interlayer bonding strength; Layered extrusion process optimization: Temperature and rotation speed are independently controlled for each layer (e.g., 900–1000 rpm for the outer layer and 500–600 rpm for the barrier layer), improving yield and production capacity.

[0017] 5. The process has strong universality. It supports various injection head shapes (round, oval, square, irregular shapes, etc.) to meet the packaging needs of high-end cosmetics. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of the structure of a TPE soft rubber head hose; Figure 2 This is a schematic diagram of the tube body.

[0019] The markings in the diagram are: 1. Hanging platform; 2. Fastening position; 3. Injection head; 4. Pipe body; 5. Outer layer; 6. First adhesive layer; 7. Barrier layer; 8. Second adhesive layer; 9. Inner layer. Detailed Implementation

[0020] In the description of this invention, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this invention, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0022] A TPE soft rubber head hose includes a tube body 4 and an injection head 3. The tube body 4 includes, from the outside to the inside, an outer layer 5, a first adhesive layer 6, a barrier layer 7, a second adhesive layer 8, and an inner layer 9. The injection head 3 is made of TPE material. The preparation method of TPE soft rubber head tube is as follows: S1. Raw material drying: Place the raw materials in the tube body 4 and injection head 3 into the hot air hopper and dry for 3 hours at a temperature of 110℃-120℃. S2, Tube body 4 forming: The tube body 4 raw material is added to the extrusion equipment, and after plasticizing, extrusion molding, cooling and shaping and traction cutting, the tube body 4 is finally formed; S3. Injection head 3 is formed. The tube body 4 is placed in the molding mold, and the injection head 3 is formed on the top of the tube body 4 by segmented injection, so that the injection head 3 and the tube body 4 are integrally formed.

[0023] Preferably, when the injection head is used for three-stage injection molding, the pressure of the first stage is 21 Bar, the speed is 18%, and the time is 1.85 s; the pressure of the second stage is 20 Bar, the speed is 18%, and the time is 0.41 s; the pressure of the third stage is 20 Bar, the speed is 18%, and the time is 0.54 s; and the holding time is 4 s.

[0024] Preferably, the top of the tube body 4 is provided with a mounting platform 1 and a fastening position 2, and the injection head 3 is located at the mounting platform 1 and the fastening position 2 and is integrally formed with the tube body 4.

[0025] Preferably, in step S2, when the tube body 4 is extruded, the molding temperature of the inner layer 9 and the outer layer 5 is 150-180℃, the molding temperature of the barrier layer 7 is 170-190℃, the temperature of the adhesive layer is 160-180℃, the extrusion speed of the outer layer 5 is 900-1000 rpm, the extrusion speed of the barrier layer 7 is 500-600 rpm, the extrusion speed of the adhesive layer is 850-1000 rpm, and the extrusion speed of the inner layer 9 is 1000-1100 rpm. Specifically, the raw material for tube body 4 is first added into the extruder barrel. Under the action of the rotating extruder screw, the heated plastic is conveyed forward along the spiral groove of the screw. During this process, the raw material is continuously heated and gradually melts into a viscous flow state. Then, under the action of the extrusion system, the molten plastic passes through the extruder head die and a series of auxiliary devices such as shaping, cooling, traction, and cutting to obtain tube body 4.

[0026] In the co-extrusion molding process, the extrusion molding process can be divided into four stages: (1) Plasticizing stage; temperature set at 180~190℃; (2) Extrusion molding stage; temperature set at 150~180℃; (3) Cooling and shaping stage; temperature set at 60~80℃; (4) Traction and cutting of plastic parts.

[0027] Specifically, the process parameters for extrusion molding mainly include temperature, extrusion speed, vacuum level, and traction speed; The specific extrusion molding temperatures are shown in Table 1 below: Table 1. Temperature Control in Extrusion Molding The specific extrusion speeds are shown in Table 2 below: Table 2. Diameter and speed of extruder screw for each layer The sizing and forming of hoses mostly adopts the vacuum external sizing process, and the vacuum degree is usually set at 0.02 MPa.

[0028] Preferably, the barrier layer 7 is made of ethylene-vinyl alcohol copolymer.

[0029] Preferably, both the outer layer 5 and the inner layer 9 are made of polyethylene.

[0030] Preferably, the materials of the first adhesive layer 6 and the second adhesive layer 8 are both maleic anhydride-modified polyolefins.

[0031] Preferably, during the molding process of the injection head 3, the melt temperature is 193-227℃ and the mold temperature is 16-38℃.

[0032] Preferably, the injection head 3 is shaped as one of the following: circular, elliptical, square, rectangular, triangular, or irregular.

[0033] advantage: 1. Significantly improves the user experience Injector 3 uses soft TPE material instead of traditional hard PE, which is soft and skin-friendly, and is especially suitable for cosmetics and other scenarios that come into direct contact with the skin.

[0034] 2. Breakthrough in the technology barrier of integral molding of heterogeneous materials The first-ever reliable combination of PE tube body 4 and TPE injection head 3: By using a segmented injection molding process (segment 1: 21 Bar / 18% / 1.85s; segment 2: 20 Bar / 18% / 0.41s; segment 3: 20 Bar / 18% / 0.54s; holding pressure 4s), the matching between the TPE injection temperature (193–227℃) and the PE melt temperature (150–180℃) is precisely controlled, overcoming material compatibility issues. 3. Enhance structural reliability The top of the tube body 4 is designed with a hanging platform 1 and a fastener 2, which increases the contact area between the TPE injection head 3 and the PE tube body 4, thereby improving the bonding strength of the heterogeneous materials and eliminating the risk of detachment.

[0035] 4. Balancing high barrier properties with production efficiency Five-layer co-extruded tube body structure (outer layer 5 / adhesive layer / barrier layer 7 / adhesive layer / inner layer 9): Barrier layer 7 effectively isolates oxygen and protects the contents; The adhesive layer (maleic anhydride modified polyolefin) ensures interlayer bonding strength; Layered extrusion process optimization: Temperature and speed are independently controlled for each layer (e.g., 5900–1000 rpm for the outer layer and 7500–600 rpm for the barrier layer), improving yield and production capacity.

[0036] 5. The process has strong universality. It supports various injection head shapes (round, oval, square, irregular, etc.) to meet the needs of high-end cosmetic packaging.

[0037] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A TPE soft rubber head hose, characterized in that: The tube body and the injection head, wherein the tube body comprises, from the outside to the inside, an outer layer, a first adhesive layer, a barrier layer, a second adhesive layer and an inner layer, the injection head is made of TPE material, and the top of the tube body is provided with a mounting platform and a fastening position, and the injection head is integrally formed with the tube body at the mounting platform and the fastening position; The preparation method of TPE soft rubber head tube is as follows: S1. Raw material drying: Place the raw material in the tube body and injection head into the hot air hopper and dry for 3 hours at a temperature of 110℃-120℃. S2. Tube body forming: The tube body raw material is added to the extrusion equipment, and after plasticizing, extrusion molding, cooling and shaping and traction cutting, the tube body is finally formed. S3. Injection head forming: The tube body is placed in the forming mold, and the injection head is formed on the top of the tube body by segmented injection, so that the injection head and the tube body are formed as one piece. When the injection head is used for segmented injection molding, the pressure of the first segment is 21 Bar, the speed is 18%, and the time is 1.85 s; the pressure of the second segment is 20 Bar, the speed is 18%, and the time is 0.41 s; the pressure of the third segment is 20 Bar, the speed is 18%, and the time is 0.54 s; and the holding time is 4 s.

2. The TPE flexible rubber head hose according to claim 1, characterized in that: In step S2, during the extrusion molding of the tube body, the molding temperature of the inner and outer layers is 150-180℃, the molding temperature of the barrier layer is 170-190℃, the temperature of the adhesive layer is 160-180℃, the extrusion speed of the outer layer is 900-1000 rpm, the extrusion speed of the barrier layer is 500-600 rpm, the extrusion speed of the adhesive layer is 850-1000 rpm, and the extrusion speed of the inner layer is 1000-1100 rpm.

3. The TPE soft rubber head hose according to claim 1, characterized in that: The barrier layer is made of ethylene-vinyl alcohol copolymer.

4. The TPE soft rubber head hose according to claim 1, characterized in that: Both the outer and inner layers are made of polyethylene.

5. The TPE flexible rubber head hose according to claim 1, characterized in that: Both the first adhesive layer and the second adhesive layer are made of maleic anhydride-modified polyolefin.

6. The TPE flexible rubber head hose according to claim 1, characterized in that: During injection molding, the melt temperature is 193-227℃ and the mold temperature is 16-38℃.

7. The TPE flexible rubber head hose according to claim 1, characterized in that: The injection head shape is one of the following: round, elliptical, square, rectangular, triangular, or irregular.

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