KR-20260065007-A - VEHICLE INSULATION PAD AND THE MANUFACTURING METHOD OF THE SAME

Abstract

The present invention aims to provide an automotive insulation pad and a method for manufacturing the same, wherein a release film is attached to a hard layer to allow for easy separation from polyurethane, and wherein, when foam molding the polyurethane, the polyurethane liquid penetrates the release film and the hard layer to integrally form multiple separable protrusions in the form of rivets, thereby enabling easy and convenient separation of the hard layer and polyurethane—which are not firmly attached by the release film—by breaking the separable protrusions when the hard layer and the polyurethane are pulled in opposite directions, thereby allowing for the recycling of the hard layer.

Inventors

• 권충호
• 이승배

Assignees

• 주식회사 대한솔루션

Dates

Publication Date

20260508

Application Date

20241031

Claims (3)

1. In a manufacturing method for forming an automotive insulation pad by sequentially laminating a hard layer (10) and a release film (20) inside a PU foam mold and foaming polyurethane (30) over the release film (20), In the hard layer (10) and the release film (20), multiple protrusion holes (11, 21) are formed through each other in an overlapping manner. A method for manufacturing an insulation pad for an automobile, characterized in that each of the above-mentioned protrusion holes (11, 21) is filled with polyurethane (30), and a portion thereof protrudes out of the hard layer (10) and expands to form a separation protrusion (31) integrally, thereby enabling the hard layer (10) and the release film (20) to be forcibly separated.
2. In paragraph 1, The hard layer (10) above is made of felt and TPO (Thermal Plastic Olefin), and A method for manufacturing an insulation pad for automobiles, characterized in that the above-mentioned release film (20) is formed by laminating a polyamide layer and a polarity polymer layer.
3. An insulation pad for automobiles characterized by being manufactured by the method for manufacturing an insulation pad for automobiles according to claim 1 or 2.

Description

Vehicle Insulation Pad and the Manufacturing Method of the Same The present invention relates to an insulation pad for automobiles and a method for manufacturing the same. More specifically, in an insulation pad manufactured by foam molding polyurethane on a hard layer, a release film is attached to the hard layer, and a portion of the polyurethane foam-molded on the release film is configured to penetrate the hard layer and the release film to form multiple separable protrusions in the form of rivets. Consequently, when the insulation pad is disposed of, the polyurethane is forcibly separated from the hard layer by gripping it, causing the separable protrusions to break and the polyurethane to be easily separated from the hard layer, thereby increasing the recycling efficiency of the hard layer. Generally, automobiles utilize insulation made of various materials to effectively regulate interior temperature, noise, and vibration. This insulation is installed in locations where noise and vibration can be mitigated, such as the dashboard, trunk, hood, and the underside and top of the engine. The following (Patent Document 1) to (Patent Document 3) disclose technology regarding insulation for automobiles made of various materials. (Patent Document 1) Korean Published Patent No. 10-2024-0084624 The hard PET sheet, TPE sheet, and polyurethane foam are configured to form a single unit, and by applying a reducing agent, which is an amine-based compound, to the surface of the hard PET sheet at a predetermined thickness, aldehyde VOCs (formaldehyde, acetaldehyde, acrolein) generated when the hard PET sheet and TPE sheet are attached as a single unit are removed, allowing for safe use. In particular, by applying the reducing agent to the surface of the hard PET sheet at a thickness of 10 to 30 g/㎡, aldehyde VOCs are removed while minimizing the weight increase of the insulation, thereby enabling safe and comfortable use. Furthermore, by thermoforming the hard PET sheet and TPE sheet and then directly foaming and molding the polyurethane foam onto the surface of the TPE sheet, aldehyde VOCs generated from the hard PET sheet can be effectively removed. (Patent Document 2) Korean Published Patent No. 10-2023-0045703 The purpose is to provide an automotive dash insulation and a method for manufacturing the same, which allows for safe use by reducing the amount of aldehydes (formaldehyde, acetaldehyde, acrolein) generated from the foamed dash insulation by introducing a sound insulation layer made of TPE and a felt layer made of hard-coated PET into a foaming mold used for polyurethane foaming, foaming and molding the polyurethane, demolding, and applying a reducing agent to the surface of the foamed polyurethane. In particular, another purpose is to provide an automotive dash insulation and a method for manufacturing the same, which allows for the removal of aldehydes by using an amine-based compound as the reducing agent, thereby forming a compound of a different structure through the reaction of the amine-based compound with the generated aldehydes. (Patent Document 3) Korean Published Patent No. 10-2020-0115853 The purpose is to provide a method for manufacturing automotive insulation and an automotive insulation using the same, which improves quality by preventing the edges of the insulation from easily peeling off or separating, by inserting a hot melt adhesive between at least two first and second layers cut into an insulation shape, particularly between the edge surfaces, and then thermoforming and pressing while applying heat. In particular, another purpose is to provide a method for manufacturing automotive insulation and an automotive insulation using the same, which maintains quality by preventing the edges from easily peeling off or separating after molding through a simple process of inserting a hot melt adhesive into the edge portions, as opposed to the conventional method of cutting the first and second layers into an insulation shape and applying heat pressure. [Fig. 1] is a side view of a car showing an example of applying an insulation pad for a car according to the present invention to dash insulation. [Fig. 2] is a perspective view showing an example of applying an insulation pad for automobiles according to the present invention to dash insulation. [Fig. 3] is a front view showing an example of applying an insulation pad for automobiles according to the present invention to dash insulation. [Fig. 4] is a cross-sectional view of a dash insulation pad for automobiles according to the present invention. [Fig. 5] is a cross-sectional view showing a state (a) in which a hard layer and a release film are laminated, each having a protruding hole formed therein according to the present invention, and a state (b) in which polyurethane is foam-molded on the release film to form an insulation pad. [Fig. 6] is a cross-sectional view showing an example of separating a hard layer from polyurethane according to the