Electric heating hair straightening comb and production process thereof

Abstract

The invention discloses an electric heating hair straightening comb and a production process thereof, and relates to the technical field of hair straightening combs. According to the production process of the electric heating hair straightening comb, a comb tooth heating base, a heating body, a comb tooth mounting base and a comb tooth piece are independently prepared through a split type fixed mounting design, and VS-S1819 single-component heat-conducting silicone adhesive is adopted for uniform coating and bonding; and depending on the adhesion and thermal conductivity of the heat-conducting glue, a uniform heat transfer interface is formed through curing treatment after assembly, a mechanical fit clearance is avoided, the reliability of heat conduction and insulation is ensured through performance verification, and fretting wear and deformation risks caused by long-term cold and hot circulation are further eliminated through gluing fixation, so that the service life of the heat-conducting glue is prolonged, and the service life of the heat-conducting glue is prolonged. The assembly precision requirement is simplified, the complexity and the cost of the production process are reduced, the stability and the durability of the product are improved, and the problems of matching looseness, abnormal sound and the like in the prior art are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of straightening combs, in particular to an electric straightening comb. BACKGROUND

[0002] As a common hair styling tool, the electric straightening comb is widely used in hair straightening and styling operations. The existing electric straightening comb usually adopts the way of heating the comb teeth to heat and straighten the hair. For example, a typical structure is disclosed in the Chinese patent with the authorization announcement number CN104856417B, which adopts the way of staggered cooperation of upper and lower comb teeth, i.e. the tooth bar of the upper comb tooth is inserted into the through hole 127 of the lower comb tooth fixed plate, the hair is clamped through the narrow gap formed between the upper and lower tooth bars, and the hair is heated and straightened during the clamping process by using the heated comb teeth.

[0003] The applicant found that such structure has the following inherent defects after practical operation: the upper and lower comb teeth need to be precisely aligned and assembled, and small production and assembly errors will affect the overall assembly and use effect, which not only increases the complexity of the manufacturing process, but also leads to high production cost; secondly, the mechanical cooperation interface between the upper and lower tooth bars may be slightly worn and deformed due to thermal expansion and contraction effect during long-term cold and hot cycle use, and the upper and lower tooth bars cannot be tightly fitted as long as there is slight deformation in one place, which leads to loose cooperation, abnormal sound and other problems, affecting the reliability of the product. Therefore, the applicant proposes an improved structure of the electric straightening comb to overcome the above defects. SUMMARY

[0004] The present application aims to provide a technical solution to solve the above problems.

[0005] To achieve the above purpose, the present application provides the following technical solution: An electric straightening comb, comprising a comb tooth heating base, a heating body is fixedly arranged on the lower end surface of the comb tooth heating base; The upper end surface of the comb tooth heating base is fixedly arrayed with a plurality of comb tooth mounting seats, and each comb tooth mounting seat is respectively sleeved with a comb tooth piece.

[0006] As a further scheme of the present application, an insertion slot is formed in the comb tooth heating base, the lower end of the comb tooth piece is inserted and cooperated in the insertion slot, and a comb tooth sleeve is fixedly arranged on the comb tooth heating base and sleeved on the comb tooth piece.

[0007] A production process of the electric straightening comb, the installation of the comb tooth piece and the heating body comprises the following steps: S100: base material preparation: clean the surfaces of the comb tooth heating base, the heating body, the comb tooth mounting seat and the comb tooth piece for bonding; S200: Thermal conductive glue coating: uniformly coat VS-S1819 single-component thermal conductive silicone glue on the surfaces of the comb heating base, heating body, comb mounting seat, and comb piece to be bonded; S300: Assembly of components: bond the comb heating base after glue coating with the heating body, and bond the comb mounting seat after glue coating with the comb piece; S400: Curing treatment: place the assembled electric heating straightening comb in an environment with a temperature of 25°C and a relative humidity of 50% for curing for 24 hours, so that the glue is cured from the surface to the inside, and the curing depth reaches 2-4 mm; S500: Performance verification: test the thermal conductivity and electrical insulation of the cured electric heating straightening comb; S600: Final assembly and packaging: install the electronic control module, wire, and external accessories of the electric heating straightening comb, and perform function testing.

[0008] As a further scheme of the present application: the single-component thermal conductive silicone glue VS-S1819 is composed of the following components with a mass percentage: Hydroxyl-terminated polydimethylsiloxane: 10%-30%; Polyfunctional siloxane: 1%-5%; Aluminum oxide: 60%-90%.

[0009] As a further scheme of the present application: the substrate preparation in S100 further includes the following steps: Use isopropyl alcohol or acetone solvent to completely remove oil and contaminants, and ensure that the surface is dry and clean; for materials with poor bonding effect on polypropylene or polyethylene, use an adhesion promoter for primer treatment, and the adhesion promoter is dried for 15-90 min in an environment with a relative humidity of ≥50% to form a uniform thin layer.

[0010] As a further scheme of the present application: the thermal conductive glue coating in S200 further includes the following steps: The average thickness of the glue layer of the thermal conductive silicone glue is controlled to be 0.1 mm, and a doctor blade is used to flatten to avoid air bubble entrainment; the assembly is performed within less than 20 min after glue coating.

[0011] As a further scheme of the present application: the assembly of components in S300 further includes the following steps: Apply a pressure of 0.1-0.5 MPa in the bonding direction of the comb heating base and heating body and the comb mounting seat and comb piece to eliminate air gaps and ensure uniform distribution of the glue; after assembly, fix the components to avoid movement or vibration before curing.

[0012] As a further scheme of the present application: the curing treatment in S400 further includes the following steps: For thick glue area or closed area, prolong the curing time to complete curing, and design a ventilation structure to promote small molecule release.

[0013] As a further scheme of the present application: the performance verification in S500 further includes the following steps: Verify whether the electrical performance between the cleaning comb tooth heating base and the heating body, and between the comb tooth mounting seat and the comb tooth piece after assembly meets the UL94V-0 flame retardant level and the use safety requirements, wherein the thermal conductivity is ≥3.0 W / m·K, the breakdown voltage is ≥10 kV / mm, and the volume resistivity is ≥1.5×10 14 Ω·cm.

[0014] As a further scheme of the present application: the final assembly and packaging in S600 further includes the following steps: The finished product is stored in a dry environment at 15-25°C and away from light, transported and packaged as non-dangerous goods, and the storage period is controlled within 6 months.

[0015] Compared with the prior art, the present application has the following advantages: The production process of the electric heating straightening comb of the present application realizes stable combination between components by separately preparing the comb tooth heating base, the heating body, the comb tooth mounting seat and the comb tooth piece through split type fixed installation design, avoids mechanical fitting gap, eliminates the risk of fretting wear and deformation caused by long-term cold and hot cycles, simplifies the assembly precision requirement, reduces the production process complexity and cost, and improves the stability and durability of the product, effectively overcoming the problems of loose fit and abnormal sound in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a structure perspective view in an embodiment of the present application; Fig. 2 is another structure perspective view of the present application; Fig. 3 is a flowchart of S100-S600 in the present application; The reference signs and names in the drawings are as follows: Comb tooth heating base-100, heating body-200, comb tooth mounting seat-300, comb tooth piece-400, plug-in slot-110, comb tooth sleeve-500. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0018] Please see Figs. 1-3 An electric hair straightening comb includes a comb tooth heating base, wherein a heating element is fixedly mounted on the lower end face of the comb tooth heating base; The upper end face of the comb tooth heating base is fixedly arrayed with several comb tooth mounting seats, and each comb tooth mounting seat is respectively fitted with a comb tooth component; In the related technologies of electric hot hair straighteners, the precision mechanical interface of the upper and lower comb teeth will experience micro-wear due to the difference in thermal expansion coefficients of different materials during long-term hot and cold cycles. This invention replaces the mechanical hard connection with a split plug-in type, which can effectively absorb and buffer the stress generated by thermal expansion and contraction, thereby eliminating the problems of loose fit, gaps and abnormal noise caused by wear and deformation, and improving the reliability and service life of the product. The split design reduces the requirements for absolute machining accuracy and assembly alignment accuracy of individual parts (such as comb tooth mounting base and comb tooth components), and can compensate for the small dimensional tolerances and assembly errors of the parts themselves. This makes the production process more tolerant, reduces the reliance on high-precision molds and complex assembly fixtures, directly simplifies the process flow, improves production yield, and effectively controls manufacturing costs. The manufacturing process of this invention's electric heating straightening comb utilizes a split-type fixed installation design, where the comb tooth heating base, heating element, comb tooth mounting seat, and comb tooth components are manufactured independently. This achieves a stable connection between components, avoids mechanical gaps, eliminates the risk of micro-motion wear and deformation caused by long-term hot and cold cycles, simplifies assembly precision requirements, reduces production process complexity and cost, and simultaneously improves product stability and durability. It effectively overcomes problems such as loose fit and abnormal noise in existing technologies.

[0019] In this embodiment of the invention, the comb heating base is provided with an insertion groove, the lower end of the comb tooth is inserted into the insertion groove, and a comb tooth sleeve fitted on the comb tooth is fixedly installed on the comb heating base. By mechanically engaging the lower end of the comb teeth with the insertion slots on the comb tooth heating base, the components are inserted after applying thermally conductive adhesive, achieving pre-positioning and alignment between them. This provides a precise physical guide and load-bearing foundation for subsequent pressure curing. This combination of mechanical interlocking design and chemical bonding significantly improves the ease and precision of assembly, effectively preventing misalignment of the comb teeth during the adhesive curing process. At the same time, it works in conjunction with the thermally conductive adhesive to form a stronger composite connection interface, thereby enhancing the comb teeth's resistance to torsion and peeling during long-term hot and cold cycling, ensuring the structural integrity of the heat conduction path and long-term reliability. By encasing the comb teeth in a protective sleeve, a physical barrier is formed. This structure works in conjunction with the internal thermally conductive adhesive system to effectively prevent direct contact between hair and the high-temperature comb teeth and metal base during use, significantly improving product safety and preventing burns. At the same time, the comb sleeve reduces the direct impact and contamination of external foreign objects on the comb teeth and the comb teeth heating base, protecting the internal structure and extending product life. Thus, while ensuring efficient heat conduction, it further enhances the user experience and operational reliability of the electric hair straightener.

[0020] A manufacturing process for an electrically heated hair straightener, wherein the installation of the comb teeth and heating element includes the following steps: S100: Substrate preparation: Clean the comb heating base, heating element, comb mounting base and the surfaces of the comb components to be bonded. S200: Thermally conductive adhesive coating: Apply VS-S1819 single-component thermally conductive silicone adhesive evenly to the comb heating base, heating element, comb mounting base, and the surfaces of the comb components used for bonding. S300: Component assembly: Attach the glued comb tooth heating base to the heating element, and attach the glued comb tooth mounting base to the comb tooth component; S400: Curing treatment: Place the assembled electric heating straightener comb in an environment with a temperature of 25℃ and a relative humidity of 50% for 24 hours to cure the colloid from the surface to the inside, with a curing depth of 2-4mm. S500: Performance Verification: Thermal conductivity and electrical insulation tests were performed on the cured electric hot hair straightener. S600: Final assembly and packaging: Install the electronic control module, wires and external accessories for the heated hair straightener, and conduct functional testing; In the related technologies of electric hot hair straighteners, the precision mechanical interface of the upper and lower comb teeth will experience fretting wear due to the difference in thermal expansion coefficients of different materials during long-term hot and cold cycles. This invention replaces the mechanical hard connection with a continuous and flexible bonding interface of thermally conductive adhesive. The adhesive layer can effectively absorb and buffer the stress generated by thermal expansion and contraction, thereby further eliminating the problems of loose fit, gaps and abnormal noise caused by wear and deformation, and improving the reliability and service life of the product. The split design reduces the requirements for absolute machining accuracy and assembly alignment accuracy of individual parts (such as comb tooth mounting base and comb tooth components). Since the thermally conductive adhesive layer has a certain thickness and plasticity, it can further compensate for the small dimensional tolerances and assembly errors of the parts themselves. This makes the production process more tolerant, reduces the reliance on high-precision molds and complex assembly fixtures, directly simplifies the process flow, improves the production yield, and effectively controls the manufacturing cost. The VS-S1819 single-component thermally conductive silicone adhesive forms an adhesive layer after curing, which firmly combines multiple independent components (heating base, heating element, comb teeth) into a whole structure. This connection method not only provides strong tensile and shear strength to prevent components from falling off under stress or vibration, but also the adhesive layer uniformly fills the micro-gaps of all bonding surfaces, ensuring structural rigidity and stability. The assembly method of the comb heating base, heating element, comb mounting base and comb components creates an efficient heat conduction path from the heating element to the comb components. The thermally conductive adhesive fills the unavoidable air gaps in the mechanical fit of the electric hair straightener technology (air is a poor conductor of heat), reducing the contact thermal resistance. This allows heat to be conducted from the heating element to the entire comb more quickly and evenly, reducing heat loss during the transfer process. This not only improves the heating speed and temperature uniformity and straightening effect, but also allows for the use of lower power settings under the same effect, thus achieving energy saving. The cured thermally conductive silicone adhesive layer itself has excellent electrical insulation properties. It forms a reliable insulating barrier between the heating element and the metal comb base and comb components, effectively preventing safety hazards such as leakage and short circuit. At the same time, the adhesive layer also protects the metal components from moisture and oxidation, further improving the safety and durability of the product in humid environments (such as bathrooms). The manufacturing process of this invention's electric heating straightening comb utilizes a split-type fixed installation design, where the comb tooth heating base, heating element, comb tooth mounting seat, and comb tooth components are prepared independently. These components are then uniformly coated and bonded using VS-S1819 single-component thermally conductive silicone adhesive, achieving a stable bond between components. Relying on the adhesive's bonding and thermal conductivity, a uniform heat transfer interface is formed after assembly through curing, avoiding mechanical gaps. Performance verification ensures reliable thermal conductivity and insulation. Adhesive bonding further eliminates the risk of fretting wear and deformation caused by long-term thermal cycling, simplifies assembly precision requirements, reduces production process complexity and cost, and simultaneously improves product stability and durability, effectively overcoming problems such as loose fit and abnormal noise in existing technologies.

[0021] In this embodiment of the invention, the single-component thermally conductive silicone adhesive VS-S1819 is composed of the following components by mass percentage: Hydroxyl-terminated polydimethylsiloxane: 10%~30%; Multifunctional siloxanes: 1%~5%; Alumina: 60%~90%; The single-component thermally conductive silicone adhesive VS-S1819 used in this invention uses hydroxyl-terminated polydimethylsiloxane as the base polymer, providing a flexible colloidal matrix and adhesion. By adding a multifunctional siloxane as a crosslinking agent, the thermally conductive silicone adhesive undergoes a condensation reaction upon contact with air moisture, forming a stable three-dimensional network structure to achieve curing. At the same time, a high proportion of alumina filler acts as a thermally conductive filler, constructing an efficient heat conduction pathway in the colloid. This ensures that the colloid has excellent adhesion and mechanical strength after curing, and can reliably fix the components; the high content of alumina gives it excellent thermal conductivity, which can significantly reduce thermal resistance and ensure efficient and uniform heat transfer from the heating element to the comb teeth; in addition, the silicone system itself has excellent electrical insulation and high and low temperature resistance, providing long-term reliable safety and durability for the hair straightener.

[0022] In this embodiment of the invention, the substrate preparation in step S100 further includes the following steps: Thoroughly degrease and remove contaminants using isopropanol or acetone solvents to ensure the surface is dry and clean; for materials such as polypropylene or polyethylene with poor adhesion, apply an adhesion accelerator as a primer, and dry the adhesion accelerator for 15-90 minutes in an environment with a relative humidity of ≥50% to form a uniform thin layer. The bonding surface is thoroughly cleaned of oil and contaminants by isopropanol or acetone solvents to eliminate the isolation layer. For low surface energy and difficult-to-bond materials such as polypropylene and polyethylene, an adhesion promoter is used to dry the film in an environment with a relative humidity of ≥50% to significantly improve its surface chemical activity and adhesion. This ensures that a strong and durable interface bond can be formed between the subsequent thermally conductive adhesive and different substrate materials. It effectively prevents poor adhesion, adhesive layer peeling, and even thermal conduction failure caused by surface contamination or material inertia. This ensures the overall structural integrity and thermal management reliability of the electric hot hair straightener under long-term hot and cold cycle use.

[0023] In this embodiment of the invention, the thermally conductive adhesive coating in step S200 further includes the following steps: The average thickness of the thermally conductive silicone adhesive layer is controlled at 0.1mm. A scraper is used to smooth it to avoid air bubbles. Assembly should be carried out within 20 minutes after the adhesive is applied. By controlling the adhesive layer thickness to 0.1mm, ideal conditions are created for the subsequent curing process, ensuring that the adhesive can cure fully and evenly from the surface inwards. At the same time, using a scraper to smooth the surface aims to eliminate air bubbles and prevent them from being trapped. The specified assembly time limit of less than 20 minutes after applying the adhesive is to complete the bonding before the adhesive surface dries, ensuring good wettability and bonding strength. This significantly improves the integrity and density of the bonding interface, avoiding thermal resistance caused by air bubbles or insufficient curing, ensuring efficient heat conduction from the heating element to the comb teeth. On the other hand, the defect-free adhesive layer achieves extremely strong mechanical fixation between components, thereby comprehensively enhancing the product reliability and service life of the electric hair straightener.

[0024] In this embodiment of the invention, the component assembly in step S300 further includes the following steps: Apply pressure of 0.1~0.5MPa along the contact direction between the comb tooth heating base and the heating element, and between the comb tooth mounting base and the comb tooth component, to eliminate air gaps and ensure uniform distribution of the colloid; fix the components after assembly to avoid movement or vibration before curing; By applying a pressure of 0.1~0.5MPa in the bonding direction, air gaps between the bonding surfaces are effectively squeezed out and eliminated, forcing the thermally conductive adhesive to flow fully and distribute evenly to form a dense interface filling layer. At the same time, excessive pressure is avoided to prevent the thermally conductive adhesive from overflowing excessively and affecting the forming thickness of the adhesive layer. The above pressure range is conducive to the shaping of the adhesive layer thickness within a suitable range. The fixing measures after assembly ensure that the component maintains its fixed position throughout the subsequent curing process of up to 24 hours, eliminating the disturbance of the adhesive layer or interface damage caused by minor movement or vibration. The benefits of this pressure control and fixed operation are twofold: on the one hand, it reduces contact thermal resistance by creating a seamless adhesive layer, ensuring efficient and uniform heat conduction; on the other hand, it provides a stable mechanical environment for the adhesive to fully cure from the surface inwards, thereby achieving a product structure with high mechanical strength, reliable adhesion, and stable thermal performance.

[0025] In this embodiment of the invention, the curing process in S400 further includes the following steps: For thick adhesive areas or enclosed areas, extend the curing time until fully cured, and design a ventilated structure to promote the release of small molecules; To address the issue of small molecule byproducts (such as water vapor) generated during the curing reaction in thick adhesive areas (where the adhesive layer thickens at bends) or enclosed spaces being difficult to expel, the curing time is extended to ensure that the adhesive achieves a complete and uniform cross-linking reaction from the surface to the interior. Simultaneously, a specially designed ventilation structure provides an escape channel for small molecules, avoiding a series of risks that may result from the formation of condensate droplets inside the product due to the accumulation of small molecules. These risks include reduced insulation performance, corrosion of metal parts, or increased internal pressure after heating. This ensures that the electric hot straightener achieves the same excellent bonding strength, thermal conductivity, and long-term electrical safety and structural reliability in complex structural areas as it does in thin adhesive areas.

[0026] In this embodiment of the invention, the performance verification in S500 further includes the following steps: Verify that the electrical performance between the assembled comb tooth heating base and heating element, and between the comb tooth mounting base and comb tooth components, meets the UL94V-0 flame retardant rating and safety requirements, specifically: thermal conductivity ≥3.0 W / m·K, breakdown voltage ≥10 kV / mm, and volume resistivity ≥1.5 × 10⁻⁶. 14 Ω·cm; By systematically testing the key performance indicators of the final assembly, including verifying its thermal conductivity ≥3.0 W / m·K to ensure efficient heat transfer, breakdown voltage ≥10 kV / mm, and volume resistivity ≥1.5 × 10⁻⁶, the final assembly was tested. 14 The Ω·cm test confirms the electrical insulation strength and overall compliance with the UL94V-0 flame retardant rating. This provides a final, quantitative confirmation of the product's material selection and manufacturing process (especially the curing effect and interface integrity of the thermally conductive adhesive) from three dimensions: thermal, electrical, and fire resistance. This ensures the safety and long-term reliability of the electric hair straightener. It not only ensures that the heat can be quickly and evenly conducted during normal operation to avoid local overheating, but also effectively prevents electrical breakdown, leakage, or fire hazards in harsh environments such as high humidity and high voltage.

[0027] In this embodiment of the invention, the final assembly and packaging in S600 further includes the following steps: The finished product should be stored in a dry, light-protected environment at 15-25℃, and transported and packaged as a non-hazardous material. The storage period should be controlled within 6 months. By storing the finished product in a light-proof, dry environment at 15-25℃ and limiting its shelf life to 6 months, the aim is to maintain the chemical stability and physical properties of the cured thermally conductive silicone adhesive system, avoiding aging, re-adhesion, or performance degradation caused by factors such as moisture, high temperature, or ultraviolet radiation. At the same time, the strict transportation and packaging as non-hazardous goods are based on the fact that the thermally conductive adhesive material has stable chemical properties after complete curing, effectively ensuring that the bonding strength, thermal conductivity, and electrical insulation properties of the electric hair straightener comb are fully maintained throughout the entire circulation process from the factory to the user.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An electrically heated hair straightening comb, characterized in that, It includes a comb-tooth heating base, and a heating element is fixedly mounted on the lower end face of the comb-tooth heating base; The upper end face of the comb heating base has a fixed array of several comb mounting seats, and each comb mounting seat is fitted with a comb component.

2. The electric heating hair straightening comb according to claim 1, characterized in that, The comb heating base has an insertion groove, and the lower end of the comb tooth is inserted into the insertion groove. A comb tooth sleeve is fixedly installed on the comb tooth heating base and fitted onto the comb tooth.

3. A manufacturing process for an electrically heated hair straightening comb, characterized in that, The installation of the comb teeth and heating element as described in claim 1 includes the following steps: S100: Substrate preparation: Clean the comb heating base, heating element, comb mounting base and the surfaces of the comb components to be bonded. S200: Thermally conductive adhesive coating: Apply VS-S1819 single-component thermally conductive silicone adhesive evenly to the comb heating base, heating element, comb mounting base, and the surfaces of the comb components used for bonding. S300: Component assembly: Attach the glued comb tooth heating base to the heating element, and attach the glued comb tooth mounting base to the comb tooth component; S400: Curing treatment: Place the assembled electric heating straightener comb in an environment with a temperature of 25℃ and a relative humidity of 50% for 24 hours to cure the colloid from the surface to the inside, with a curing depth of 2-4mm. S500: Performance Verification: Thermal conductivity and electrical insulation tests were performed on the cured electric hot hair straightener. S600: Final Assembly and Packaging: Install the electronic control module, wiring and external accessories for the heated hair straightener, and conduct functional testing.

4. The manufacturing process of an electric heating hair straightener according to claim 3, characterized in that, The single-component thermally conductive silicone adhesive VS-S1819 is composed of the following components by weight percentage: Hydroxyl-terminated polydimethylsiloxane: 10%~30%; Multifunctional siloxanes: 1%~5%; Alumina: 60%~90%.

5. The manufacturing process of an electric heating straightening comb according to claim 3, characterized in that, The substrate preparation in step S100 also includes the following steps: Thoroughly degrease and remove contaminants using isopropanol or acetone solvents to ensure the surface is dry and clean. For materials such as polypropylene or polyethylene with poor adhesion, apply an adhesion accelerator as a primer. The adhesion accelerator should be dried for 15-90 minutes in an environment with a relative humidity of ≥50% to form a uniform thin layer.

6. The manufacturing process of an electric heating straightening comb according to claim 3, characterized in that, The thermally conductive adhesive coating in S200 also includes the following steps: The average thickness of the thermally conductive silicone adhesive layer is controlled at 0.1mm. A scraper is used to smooth the adhesive to avoid air bubbles. Assembly should be carried out within 20 minutes after the adhesive is applied.

7. The manufacturing process of an electric heating straightening comb according to claim 3, characterized in that, The component assembly in S300 also includes the following steps: Apply pressure of 0.1~0.5MPa along the contact direction between the comb tooth heating base and the heating element, and between the comb tooth mounting base and the comb tooth component, to eliminate air gaps and ensure uniform distribution of the colloid; fix the components after assembly to avoid movement or vibration before curing.

8. The manufacturing process of an electric heating straightening comb according to claim 3, characterized in that, The curing process in S400 also includes the following steps: For thick adhesive areas or enclosed areas, extend the curing time until fully cured, and design a ventilated structure to promote the release of small molecules.

9. The manufacturing process of an electric heating straightening comb according to claim 3, characterized in that, The performance verification in the S500 also includes the following steps: Verify that the electrical performance between the assembled comb tooth heating base and heating element, and between the comb tooth mounting base and comb tooth components, meets the UL94V-0 flame retardant rating and safety requirements, specifically: thermal conductivity ≥3.0 W / m·K, breakdown voltage ≥10 kV / mm, and volume resistivity ≥1.5 × 10⁻⁶. 14 Ω·cm.

10. The manufacturing process of an electric heating straightening comb according to claim 3, characterized in that, The final assembly and packaging of the S600 also includes the following steps: The finished product should be stored in a dry environment away from light at 15-25℃, and transported and packaged as a non-hazardous material. The storage period should be controlled within 6 months.

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