Preparation process of automobile cushion piece and automobile cushion piece

Abstract

The invention discloses a preparation process of an automobile cushion piece and the automobile cushion piece, and the preparation process of the automobile cushion piece comprises the following steps: S1, firstly melting and plasticizing a TPE particle raw material through an extruder, and then cooling and shaping to prepare a TPE base material sheet; s2, a target pattern is printed on the surface of the carrier film through ink by means of the UV ink-jet printing technology, so that a transfer film is obtained, and active antibacterial components are added into the ink; and S3, preheating the TPE base material sheet, covering the TPE base material sheet with the transfer printing film, performing composite compaction process treatment through a stepped hot pressing process, and finally cooling and stripping the transfer printing film to obtain the pad structure. According to the prepared automobile cushion piece, the safety protection, sanitation and health, the service life and the like of an automobile interior function piece can be comprehensively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile pads, and further to a preparation process of an automobile pad and the automobile pad. Background Art

[0002] Car floor mats are environmentally friendly automotive interior components that integrate five core functions: water absorption, dirt isolation, anti-slip, noise reduction, and main body carpet protection. They also have aesthetic decorative properties and can significantly enhance the practicality and comfort of the driving space. Their functionality is highly dependent on the performance of the substrate. In practice, car owners often store shopping bags, express parcels, daily necessities, and pet supplies in the trunk area of ​​their vehicles. After use, the plush surface of the vehicle is easily damp, stained, and clings to pet hair, leading to problems such as difficulty in cleaning, bacterial growth, and residual odor. Currently, PVC has become the mainstream substrate for car floor mats due to its low cost, easy cleaning and maintenance, and excellent waterproof and wear-resistant properties. However, the PVC matrix has the disadvantages of significant brittleness, poor plasticizing processing properties, lack of antibacterial properties, and poor UV aging resistance, making it difficult to meet the weather resistance requirements for long-term outdoor use.

[0003] Therefore, it is urgent to develop a preparation process for automobile gaskets to solve the technical problems in the prior art. Summary of the Invention

[0004] In view of the above technical problems, the purpose of the present invention is to provide a preparation process of an automobile gasket, which can solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present application provides a process for preparing an automobile gasket, comprising the following steps:

[0007] S1: The TPE pellet raw material is first melted and plasticized through an extruder, and then cooled and shaped to produce a TPE substrate sheet;

[0008] S2: Printing a target pattern on the surface of the carrier film using a UV inkjet printing process to obtain a transfer film, wherein the ink contains an active antibacterial component;

[0009] S3: preheating the TPE substrate sheet, covering it with the transfer film, and then subjecting it to a composite compaction process through a hot pressing process. Finally, after cooling, the transfer film is peeled off to obtain a gasket structure.

[0010] In some embodiments, the extruder is a twin-screw extruder, the rotation speed of the twin-screw extruder is 150-200 rpm, and the temperature of the melt plasticization is 170°C-200°C.

[0011] In some embodiments, the target pattern is a carbon fiber texture pattern.

[0012] In some embodiments, the preheating temperature is 120-160°C.

[0013] In some embodiments, the step-by-step hot pressing process includes an initial stage and a final stage, and the pressure of the step-by-step hot pressing process increases gradually from the initial stage to the final stage.

[0014] In some embodiments, the pressure in the final stage is 3-5 MPa, the holding time in the final stage is 5-8 min, and the temperature in the final stage is 120-150° C.;

[0015] The pressure in the final stage is 8-12 MPa, the holding time in the final stage is 3-5 min, and the temperature in the final stage is 80-120°C.

[0016] In some embodiments, the active antimicrobial component is a quaternary ammonium polymer.

[0017] In some embodiments, the method for preparing the quaternary ammonium salt polymer comprises:

[0018] A1: Cardanol reacts with epichlorohydrin to generate a modified monomer containing an epoxy group;

[0019] A2: The modified monomer is copolymerized with dimethyldiallylammonium chloride to form a copolymer;

[0020] A3: The copolymer is reacted with 2,6-diaminopyridine.

[0021] According to another aspect of the present invention, the present invention further provides an automobile gasket, which is prepared according to the preparation process of the automobile gasket described in any of the above embodiments.

[0022] Compared with the prior art, the preparation process of the automobile gasket provided by the present invention has the following beneficial effects:

[0023] 1. This invention uses UV inkjet printing to replace traditional printing, achieving the ability to accurately reproduce the target pattern on the cushion, meeting the high-end aesthetic requirements of automotive interiors while also meeting the environmental requirements of low emissions. In addition, after the transfer film is laminated with the TPE substrate through a stepped hot pressing process, the pattern layer and the substrate are tightly bonded, thereby effectively avoiding the pattern peeling and fading problems that are prone to traditional printing, thereby extending the product life and effectively improving product competitiveness.

[0024] 2. The present invention adds quaternary ammonium salt polymers to the ink to give the ink strong antibacterial ability, thereby inhibiting the growth of bacteria on the surface of the automotive cushion, thereby effectively improving the antibacterial performance of the automotive cushion, making it suitable for use in humid or high-temperature environments. DETAILED DESCRIPTION

[0025] The contents of the main raw materials and their components used in the examples and comparative examples are as follows:

[0026] The ink is UV ink sold by Avery Ink; the TPE particle raw material is TPE particles with a Shore hardness of 60-70A provided by Suzhou Baijinrun Plasticizing Co., Ltd.

[0027] The present application is further described in detail below with reference to the following examples and comparative examples.

[0028] Examples 1-4 and Comparative Examples 1-2 provide methods for preparing automobile gaskets.

[0029] Example 1 provides an automobile cushion and a method for preparing the same. The method for preparing the automobile cushion comprises the following steps:

[0030] The TPE pellet raw material is first melted and plasticized by a twin-screw extruder at a speed of 160 rpm and a melt-plasticization temperature of 170°C, and then cooled and shaped to obtain a TPE substrate sheet. Then, a carbon fiber texture pattern is printed on the surface of the carrier film using ink using a UV inkjet printing process to obtain a transfer film. The TPE substrate sheet is preheated at 130°C and covered with a transfer film. It is then subjected to a step-by-step hot pressing process for composite compaction. Finally, the transfer film is peeled off after cooling to obtain a gasket structure. The step-by-step hot pressing process transitions from the initial stage to the final stage. The pressure in the initial stage is 3MPa, the temperature is 120℃, and the holding time is 5min. The pressure in the final stage is 8MPa, the temperature is 90℃, and the holding time is 3min. In addition, an active antibacterial component is added to the ink. The active antibacterial component is a quaternary ammonium salt polymer. Its preparation process is as follows: first, cardanol and epichlorohydrin are reacted under the catalysis of triethylamine to generate an epoxy-containing modified monomer, and then the modified monomer is free radical polymerized with dimethyldiallylammonium chloride to obtain a copolymer. Finally, the copolymer is ring-opened and esterified with 2,6-diaminopyridine under alkaline conditions to obtain the active antibacterial component.

[0031] Example 2

[0032] Example 2 provides an automobile cushion and a method for preparing the same. The method for preparing the automobile cushion comprises the following steps:

[0033] The TPE granular raw material is first melted and plasticized by a twin-screw extruder at a speed of 170 rpm and a melt-plasticization temperature of 180°C, and then cooled and shaped to obtain a TPE substrate sheet. Then, the carbon fiber texture pattern is printed on the surface of the carrier film using ink using a UV inkjet printing process to obtain a transfer film. The TPE substrate sheet is preheated at 140°C and covered with a transfer film. It is then subjected to a step-by-step hot pressing process for composite compaction. Finally, the transfer film is peeled off after cooling to obtain a gasket structure. The step-by-step hot pressing process transitions from the initial stage to the final stage. The pressure in the initial stage is 4MPa, the temperature is 140℃, and the holding time is 6min. The pressure in the final stage is 10MPa, the temperature is 100℃, and the holding time is 4min. In addition, an active antibacterial component is added to the ink. The active antibacterial component is a quaternary ammonium salt polymer. Its preparation process is as follows: first, cardanol and epichlorohydrin are reacted under the catalysis of triethylamine to generate an epoxy-containing modified monomer, and then the modified monomer is free radical polymerized with dimethyldiallylammonium chloride to obtain a copolymer. Finally, the copolymer is ring-opened and esterified with 2,6-diaminopyridine under alkaline conditions to obtain the active antibacterial component.

[0034] Example 3

[0035] Example 3 provides an automobile cushion and a method for preparing the same. The method for preparing the automobile cushion comprises the following steps:

[0036] The TPE granular raw material is first melted and plasticized by a twin-screw extruder at a speed of 180 rpm and a melt-plasticization temperature of 190°C, and then cooled and shaped to obtain a TPE substrate sheet. Then, the carbon fiber texture pattern is printed on the surface of the carrier film using ink using a UV inkjet printing process to obtain a transfer film. The TPE substrate sheet is preheated at 150°C and covered with a transfer film. It is then subjected to a step-by-step hot pressing process for composite compaction. Finally, the transfer film is peeled off after cooling to obtain a gasket structure. The step-by-step hot pressing process transitions from the initial stage to the final stage. The pressure in the initial stage is 5MPa, the temperature is 140℃, and the holding time is 7min. The pressure in the final stage is 10MPa, the temperature is 110℃, and the holding time is 5min. In addition, an active antibacterial component is added to the ink, and the active antibacterial component is a quaternary ammonium salt polymer. The specific preparation process is as follows: first, cardanol and epichlorohydrin are reacted under the catalysis of triethylamine to generate an epoxy-containing modified monomer, and then the modified monomer is free radical polymerized with dimethyldiallylammonium chloride to obtain a copolymer. Finally, the copolymer is ring-opened and esterified with 2,6-diaminopyridine under alkaline conditions to obtain the active antibacterial component.

[0037] Example 4

[0038] Example 4 provides an automobile cushion and a method for preparing the same. The method for preparing the automobile cushion comprises the following steps:

[0039] The TPE granular raw material is first melted and plasticized by a twin-screw extruder at a speed of 200 rpm and a melt-plasticization temperature of 200°C, and then cooled and shaped to obtain a TPE substrate sheet. Then, the carbon fiber texture pattern is printed on the surface of the carrier film using ink using a UV inkjet printing process to obtain a transfer film. The TPE substrate sheet is preheated at 160°C and covered with a transfer film. It is then subjected to a step-by-step hot pressing process for composite compaction. Finally, the transfer film is peeled off after cooling to obtain a gasket structure. The step-by-step hot pressing process transitions from the initial stage to the final stage. The pressure in the initial stage is 3MPa, the temperature is 120℃, and the holding time is 8min. The pressure in the final stage is 12MPa, the temperature is 110℃, and the holding time is 5min. In addition, an active antibacterial component is added to the ink. The active antibacterial component is a quaternary ammonium salt polymer. The specific preparation process is as follows: first, cardanol and epichlorohydrin are reacted under the catalysis of triethylamine to generate an epoxy-containing modified monomer, and then the modified monomer is free radical polymerized with dimethyldiallylammonium chloride to obtain a copolymer. Finally, the copolymer is ring-opened and esterified with 2,6-diaminopyridine under alkaline conditions to obtain the active antibacterial component.

[0040] Comparative Example 1

[0041] Comparative Example 1 provides an automobile cushion and a preparation method thereof, wherein the preparation method of the automobile cushion comprises the following steps:

[0042] The TPE granular raw material is first melted and plasticized by a twin-screw extruder at a speed of 160 rpm and a melt-plasticization temperature of 170°C, and then cooled and shaped to obtain a TPE substrate sheet. Then, the carbon fiber texture pattern is printed on the surface of the carrier film using ink using a traditional gravure printing process to obtain a transfer film. The TPE substrate sheet is preheated at 130°C and covered with a transfer film, and then subjected to a step-by-step hot pressing process for a composite compaction process. Finally, the transfer film is peeled off after cooling to obtain a gasket structure. The step-by-step hot pressing process transitions from an initial stage to a final stage. The initial stage has a pressure of 3 MPa, a temperature of 120°C, and a holding time of 5 min. The final stage has a pressure of 8 MPa, a temperature of 90°C, and a holding time of 3 min.

[0043] Comparative Example 2

[0044] Comparative Example 2 provides an automobile cushion and a preparation method thereof, wherein the preparation method of the automobile cushion comprises the following steps:

[0045] The TPE granular raw material is first melt-plasticized by a twin-screw extruder at a speed of 160 rpm and a melt-plasticization temperature of 170°C, and then cooled and shaped to obtain a TPE substrate sheet. The carbon fiber texture pattern is then printed on the surface of the carrier film using ink using a UV inkjet printing process to obtain a transfer film. The TPE substrate sheet is preheated at 130°C and covered with a transfer film, and then subjected to a conventional hot pressing process for composite compaction. Finally, the transfer film is peeled off after cooling to obtain a pad structure. An active antibacterial component is added to the ink, and the active antibacterial component is a quaternary ammonium salt polymer. The preparation process is specifically as follows: first, cardanol and epichlorohydrin are reacted under the catalysis of triethylamine to generate an epoxy-containing modified monomer, and then the modified monomer is free radical polymerized with dimethyldiallylammonium chloride to obtain a copolymer. Finally, the copolymer is ring-opened and esterified with 2,6-diaminopyridine under alkaline conditions to obtain the active antibacterial component.

[0046] Performance testing

[0047] The automotive gaskets prepared in Examples 1-4 and Comparative Examples 1-2 were tested for tensile properties, anti-aging properties, and antibacterial properties. The tensile properties were tested in accordance with GB / T 528-2009, "Vulcanized Rubber or Thermoplastic Rubber - Determination of Tensile Properties." The anti-aging properties were tested in accordance with GB / T 16422.3-2014, "Plastics Laboratory Light Source Exposure Tests - Part 3: Fluorescent Ultraviolet Lamp." The antibacterial properties were tested in accordance with QC / T 897-2011, "Evaluation Method for Antibacterial Properties of Automotive Interior Materials." Staphylococcus aureus and Escherichia coli were selected as the required bacterial species for testing. The results are shown in Table 1.

[0048] Table 1

[0049]

[0050] It can be seen from Table 1 that compared with Comparative Example 1, the automobile gaskets prepared in Examples 1-4 have more excellent mechanical properties and aging resistance. Compared with Comparative Example 2, the automobile gaskets prepared in Examples 1-4 have more excellent antibacterial properties.

[0051] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A process for preparing an automobile cushion, characterized in that: The following steps are involved: S1: The TPE pellet raw material is first melted and plasticized through an extruder, and then cooled and shaped to produce a TPE substrate sheet; S2: Printing a target pattern on the surface of the carrier film using a UV inkjet printing process to obtain a transfer film, wherein the ink contains an active antibacterial component; S3: preheating the TPE substrate sheet, covering it with the transfer film, and then subjecting it to a composite compaction process using a step-by-step hot pressing process. Finally, after cooling, the transfer film is peeled off to obtain a gasket structure.

2. The process for preparing the automobile cushion according to claim 1, characterized in that: The extruder is a twin-screw extruder, the rotation speed of the twin-screw extruder is 150-200 rpm, and the temperature of the melt plasticization is 170° C.-200° C.

3. The process for preparing the automobile cushion according to claim 2, characterized in that: The target pattern is a carbon fiber texture pattern.

4. The process for preparing the automobile cushion according to claim 3, characterized in that: The temperature of the preheating treatment is 120-160°C.

5. The process for preparing the automobile cushion according to any one of claims 1 to 4, characterized in that: The step-by-step hot pressing process includes an initial stage and a final stage, and the pressure of the step-by-step hot pressing process increases gradually from the initial stage to the final stage.

6. The process for preparing the automobile cushion according to claim 5, characterized in that: The pressure in the final stage is 3-5 MPa, the holding time in the final stage is 5-8 min, and the temperature in the final stage is 120-150° C. The pressure in the final stage is 8-12 MPa, the holding time in the final stage is 3-5 min, and the temperature in the final stage is 80-120°C.

7. The process for preparing the automobile cushion according to claim 6, characterized in that: The active antibacterial component is a quaternary ammonium salt polymer.

8. The process for preparing the automobile cushion according to claim 7, characterized in that: The preparation method of the quaternary ammonium salt polymer comprises: A1: Cardanol reacts with epichlorohydrin to generate a modified monomer containing an epoxy group; A2: The modified monomer is copolymerized with dimethyldiallylammonium chloride to form a copolymer; A3: The copolymer is reacted with 2,6-diaminopyridine.

9. An automobile cushion, characterized in that: The automotive gasket is prepared according to the preparation process of claims 1-8.

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