WO2021149976A1

WO2021149976A1 - Automotive luggage board panel and manufacturing method therefor

Info

Publication number: WO2021149976A1
Application number: PCT/KR2021/000581
Authority: WO
Inventors: 김효식; 이응기
Original assignee: 김효식; 이응기
Priority date: 2020-01-20
Filing date: 2021-01-15
Publication date: 2021-07-29
Also published as: KR20210094180A; KR102387971B1

Abstract

The present invention relates to an automotive luggage board panel and a manufacturing method therefor. According to the present invention, provided is the automotive luggage board panel comprising: a core foam layer made of an extrusion foam of polypropylene (PP) resin or polyethylene terephthalate (PET) resin; two non-foam layers respectively placed on both surfaces of the core foam layer, and made of a non-foam of a resin that is the same that of the core foam layer; two glass fiber scrim layers that are arranged to be laminated on the respective outer surfaces of the two non-foam layers; and two nonwoven fabric layers arranged to be laminated on the respective outer surfaces of the two glass fiber scrim layers, and manufactured from a resin that is the same as that of the core foam layer. The present invention can provide: a luggage board panel, which facilitates eco-friendly recycling and is manufactured by a simple process and at low manufacturing cost; and a manufacturing method therefor.

Description

Luggage board panel for automobile and manufacturing method thereof

The present invention relates to a panel for a luggage board of an automobile and a method for manufacturing the same. Specifically, the present invention relates to a panel for a luggage board of an automobile composed of polypropylene (PP) or polyethylene terephthalate (PET) foam, and a multi-layer structure formed through a single process, and a manufacturing method thereof. In the panel for luggage board according to various embodiments of the present invention, the core is made of PP (polypropylene) or PET (polyethylene terephthalate) resin foam, and the entire part is recycled as it is by finishing the surface with the same material as the core foam. It is characterized in that this is possible. In addition, it is characterized in that the manufacturing cost is low because a multi-layered board is formed through a single process.

1 shows an example of a luggage room and luggage board of an automobile.

As shown in FIG. 1 , in general, a luggage room 3 in which various kinds of cargo can be loaded is provided behind the rear seat 1 of a hatchback vehicle such as a passenger car or SUV (sport-utility vehicle). Luggage room (3) includes luggage trim (2, luggage trim) positioned on the left and right with respect to the rear seat (1), and a floor panel (floor panel) and its rear panel (floor panel) at the rear of the luggage trim (2). A space for loading cargo is formed by a transverse trim protruding to a predetermined height on the rear side. In addition, the luggage room 3 is provided at the same height as the uppermost end of the transverse stream by the support structure and guide structure formed in the luggage trim 2, so that the cargo can be stored according to use and size. A luggage board 4 dividing the space is installed. That is, the conventional luggage board 4 for a vehicle is proposed so that a user can store various sizes of cargo in the luggage room 3 , and a support structure and a guide structure are made in the luggage trim 2 and mounted at the upper and lower ends. do.

2 and 3 show an example of a panel for a luggage board of an automobile.

2 and 3, the conventional luggage board 4 for automobiles is formed of a sandwich panel. The luggage board panel of FIGS. 2 and 3 includes a core layer 5 having uniform cells 8 and a honeycomb structure in which each cell has a constant length l, and on top of the core layer 5 A first skin layer 6 to be laminated and a second skin layer 7 to be laminated under the core layer 5 to face the first skin layer 6 are provided.

However, in the luggage board panel of FIGS. 2 and 3, the core layer is made of paper, so the adhesive strength is weakened over time, or the core layer and the first and second skin layers are not well adhered during the manufacturing process. (5) and the first and

second skin layers

6 and 7 are peeled off, and accordingly, the user has to replace the luggage board, which causes inconvenience to the user and increases the maintenance cost of the vehicle.

4 shows an example of a panel for a luggage board of an automobile.

Korean Patent No. 10-1952485, as shown in FIG. 4, in addition to the core layer 20 having a honeycomb structure,

skin layers

30 and 40, bonding reinforcing

layers

50 and 60, strength reinforcing layers 70, 80) discloses a panel 10 for a luggage board including a multi-layer structure such as and a manufacturing method thereof. However, in the panel 10 of Korean Patent Registration No. 10-1952485 and its manufacturing method, recycling is difficult because the core layer of the honeycomb structure made of paper and the plastic multi-layer structure on the surface are different materials, and the manufacturing process is multi-step As a result, there was a problem in that it was complicated and the manufacturing cost was high.

5 shows an example of a panel for a luggage board of an automobile.

Korean Patent Registration No. 10-1811727 includes a core layer 100 made of expanded polypropylene (EPP) bead foam instead of a honeycomb-structured core layer as shown in FIG. 5, and a reinforcing sheet layer ( 200 and 210, and a panel 400 for a luggage board further comprising

nonwoven layers

300 and 310, and a method for manufacturing the same. The panel 400 of Korean Patent Registration No. 10-1811727 and its manufacturing method are relatively easier to recycle than a panel including a core layer of a honeycomb structure. However, the panel 400 of Korean Patent Registration No. 10-1811727 and the manufacturing method thereof include the core layer 100 of EPP bead foam formed by steam by putting it in a mold, and other

reinforcing sheet layers

200 and 210 and Since the

nonwoven fabric layers

300 and 310 have to be separately manufactured and then manufactured by bonding and laminating each layer, the manufacturing process is complicated as multiple steps, and the manufacturing cost is high.

Accordingly, there is a need for a panel for a luggage board that can replace the conventional panel for a luggage board, which is environmentally friendly, is easy to recycle, has a simple process, and has a low manufacturing cost, and a method for manufacturing the same.

The present invention aims to solve the following problems in order to solve the above problems.

An object of the present invention is to provide a panel for a luggage board that is environmentally friendly, easy to recycle, has a simple process, and has a low manufacturing cost, and a method for manufacturing the same.

An object of the present invention is to provide a panel for a luggage board composed of PP (polypropylene) or PET (polyethylene terephthalate) resin foam and having a multi-layer structure formed through a single co-extrusion and foaming process, and a method for manufacturing the same. do.

The present invention provides a luggage board panel capable of improving fuel efficiency of a vehicle by reducing the density of PP (polypropylene) or PET (polyethylene terephthalate) resin foam constituting a core layer so that the luggage board is lightened, and manufacturing the same The purpose is to provide a method.

An object of the present invention is to provide a panel for a luggage board, and a method for manufacturing the same, having bending rigidity equal to or higher than that of a conventional panel for luggage board.

An object of the present invention is to provide a panel for a luggage board that does not release a toxic organic solvent, etc. during the manufacturing process because a separate interlayer adhesive is not required, and a method for manufacturing the same.

The problems to be solved of the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those of ordinary skill in the art from the following description.

According to various embodiments of the present invention, a panel for a luggage board of an automobile is provided. The luggage board panel includes a core foam layer composed of an extruded foam of PP (polypropylene) resin or PET (polyethylene terephthalate) resin; two non-foaming layers disposed on each of both surfaces of the core foam layer and composed of a non-foaming material of the same resin as the core foam layer; two glass fiber scrim layers disposed by lamination to the outer surface of each of the two non-foamed layers; and two nonwoven layers disposed by being laminated to the outer surface of each of the two glass fiber scrim layers and made of the same resin as the core foam layer.

According to various embodiments of the present disclosure, a method of manufacturing a panel for a luggage board of a vehicle is provided. The manufacturing method of the panel for the luggage board includes a process of injecting a PP (polypropylene) resin or a PET (polyethylene terephthalate) resin into a tandem foaming extruder in which a primary extruder and a secondary extruder are connected in series, and a foaming agent in the tandem foaming extruder. A process of adding 1 to 10 parts by weight of at least one of propane, butane, pentane, or carbon dioxide as a tandem foaming extruder, and 0.2 parts by weight of at least one of talc, calcium carbonate, titanium dioxide, and aluminum hydroxide as a nucleating agent to the tandem foaming extruder The process of adding to 5 parts by weight, the process of extruding a core foam layer composed of an extruded foam of PP resin or PET resin through the tandem foam extruder, and the same as the core foam layer of PP resin or PET resin through a sub-extruder The process of extruding the non-foaming layer of the resin, and the process of discharging the three-layered resin of the first non-foaming layer, the core foam layer, and the second non-foaming layer through the co-extrusion die connected to the tandem foaming extruder and the sub-extruder And, the process of putting the three-layer structure resin into the calibrator for cooling, and simultaneously putting a glass fiber scrim and a nonwoven fabric on both sides of the three-layer structure resin together with the three-layer structure resin into the calibrator at the same time, and laminating the glass fiber scrim and the nonwoven fabric on both outer sides of the three-layer structure resin.

The present invention can provide a lightweight luggage board panel and a manufacturing method thereof, which are environmentally friendly, very easy to recycle all parts when scrapped, a simple process, and low manufacturing cost.

The present invention provides a panel for a luggage board composed of PP (polypropylene) or PET (polyethylene terephthalate) foam, which is a thermoplastic general-purpose resin, and in which a multi-layer structure is formed at once through a single co-extrusion continuous foaming process, and a method for manufacturing the same can provide

The present invention can provide a panel for a luggage board capable of improving fuel efficiency of a vehicle by lowering the density of foam constituting a core layer to make the luggage board light, and a method for manufacturing the same.

The present invention can provide a panel for a luggage board and a method for manufacturing the same having a bending rigidity equal to or higher than that of a conventional panel for a luggage board.

The present invention can provide a panel for a luggage board that does not release a toxic organic solvent, etc. during the manufacturing process because a separate interlayer adhesive is not required and a manufacturing method thereof.

Effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those of ordinary skill in the art from the following description.

1 shows an example of a luggage room and luggage board of an automobile.

2 shows an example of a panel for a luggage board of an automobile.

3 shows an example of a panel for a luggage board of an automobile.

4 shows an example of a panel for a luggage board of an automobile.

5 shows an example of a panel for a luggage board of an automobile.

6 illustrates a panel for a luggage board of a vehicle according to various embodiments of the present disclosure.

7 illustrates a panel for a luggage board of a vehicle according to various embodiments of the present disclosure.

8 illustrates a panel for a luggage board of a vehicle according to various embodiments of the present disclosure.

9 illustrates a manufacturing process of a panel for a luggage board of a vehicle according to various embodiments of the present disclosure.

10 illustrates a manufacturing process of a panel for a luggage board of a vehicle according to various embodiments of the present disclosure.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in several different forms and is not limited to the embodiments described herein.

Referring to FIG. 6 , a panel 600 for a luggage board of a vehicle according to various embodiments of the present disclosure is a core foam layer 610 made of PP (polypropylene) or PET (polyethylene terephthalate) foam, which is a thermoplastic general-purpose resin. ), non-foaming

layers

621 and 622 and finishing

nonwoven layers

631 and 632 .

The core foam layer 610 is composed of a PP or PET foam layer. The core foam layer 610 may have a thickness of 5 to 50 mm, and a density of 20 kg/m ³ to 400 kg/m ³ .

Since the

non-foaming layers

621 and 622 must use the same material as the core foam layer 610, either PP or PET is selected to form a non-foaming layer. According to various embodiments of the present disclosure, the

non-foaming layers

621 and 622 may be formed of a non-foaming layer to which chopped glass fibers are added as a reinforcing material. The

non-foamed layers

621 and 622 may have a thickness of 0.1 to 5.0 mm. The

non-foaming layers

621 and 622 are discharged through the die of the co-extrusion foaming equipment. At this time, since the non-foaming layer surrounds both sides of the core foam layer 610 and is co-extruded at the same time, there is no problem of the interface falling. It has the advantage of not occurring.

The

non-woven layers

631 and 632 are composed of a non-woven fabric of PP or PET material in order to match the material with the core foam layer and the non-foaming layer. The

nonwoven layers

631 and 632 may have a color that is usually black. The

nonwoven layers

631 and 632 may have a thickness of 0.05 to 5.0 mm. At the moment when the core foam layer 610 and the

non-foaming layer

621, 622 are discharged through the co-extrusion die in the foam extrusion equipment, the non-woven fabric layers 631 and 632 are laminated on both sides, that is, by lamination. Adhesive is not required as thermal bonding occurs naturally.

7 illustrates a panel for a luggage board of a vehicle according to various embodiments of the present disclosure. Specifically, FIG. 7 shows a structure separated for each layer of the panel for a luggage board of a vehicle configured with five layers previously presented in FIG. 6 .

Referring to FIG. 7 , a panel 700 for a luggage board of a vehicle according to various embodiments of the present disclosure includes a core foam layer 710 made of PP or PET foam,

non-foaming layers

721 and 722 , and a non-woven fabric for finishing.

Layers

731 and 732 are included.

The core foam layer 710 is composed of a PP or PET foam layer. The core foam layer 710 may have a thickness of 5 to 50 mm. For uniform high-quality foaming of the core foam layer 710, in addition to PP or PET resin, as a nucleating agent, one of talc, calcium carbonate, aluminum hydroxide or titanium dioxide, or these mixtures may be used. In addition, as a blowing agent necessary for volume expansion, one or a mixture of butane, pentane, and carbon dioxide may be used.

Non-foaming layers

721 and 722 are comprised of PP or PET non-foaming layers. 2 to 40 parts by weight of chopped glass fibers may be added to the

non-foaming layers

721 and 722 based on 100 weight of the non-foaming layer as a reinforcing material for improving mechanical strength. The

non-foamed layers

721 and 722 may have a thickness of 0.1 to 5.0 mm. The length of the glass fibers added to the

non-foamed layers

721 and 722 has a length of 2 to 30 mm. Short fibers of glass fibers are uniformly dispersed in the resin layer, thereby improving strength.

The

non-woven layers

731 and 732 are made of a non-woven fabric made of PP or PET. Nonwoven layers 731 and 732 may have a normally black color. Nonwoven layers 731 and 732 may have a thickness of 0.05 to 5.0 mm.

The panel 700 for the luggage board may have excellent bending rigidity.

Although the mechanical strength of the lightweight core foam layer 710 is low, the sandwich structure has the effect of remarkably increasing the bending rigidity. In particular, the

non-foaming layers

721 and 722 surrounding the core foam layer 710 on both sides enhance the rigidity of the ideal sandwich structure. In addition, chopped glass fibers uniformly dispersed in the

non-foaming layers

721 and 722 can significantly improve the load limit of the entire luggage board panel 700 .

From a theoretical point of view, the bending phenomenon of a certain sheet material is based on the phenomenon of elongation on one surface and compression on the opposite surface. Therefore, even if the mechanical stiffness of the core foam layer 710 is low, if the tensile modulus or compressive modulus of the surface of the core foam layer 710 is excellent, the bending stiffness of the entire sheet material having a sandwich shape will improve dramatically. The crushed glass fiber added as a reinforcing material to the

non-foamed layers

721 and 722 has an excellent effect of improving the tensile modulus and compressive modulus of the surface of the core foam layer 710 .

8 illustrates a panel for a luggage board of a vehicle according to various embodiments of the present disclosure. Specifically, FIG. 8 shows a separation structure for each layer of a panel for a luggage board of a vehicle composed of 7 layers.

Referring to FIG. 8 , a panel 800 for a luggage board of a vehicle according to various embodiments of the present disclosure includes a core foam layer 810 made of PP or PET foam,

non-foaming layers

821 and 822 , and a glass fiber scrim. (fiber glass scrim) layers (831, 832) and finishing non-woven layers (841, 842).

The core foam layer 810 is composed of a PP or PET foam layer. The core foam layer 810 may have a thickness of 5-50 mm. For uniform high-quality foaming of the core foam layer 810, in addition to PP or PET resin, talc, calcium carbonate, aluminum hydroxide or titanium dioxide as a nucleating agent, or one of these mixtures may be used. In addition, as a blowing agent necessary for volume expansion, one or a mixture of propane, butane, pentane, and carbon dioxide may be used.

Non-foaming layers

821 and 822 are comprised of PP or PET non-foaming layers. 2 to 40 parts by weight of chopped glass fibers may be added to the

non-foaming layers

821 and 822 based on 100 weight of the non-foaming layer as a reinforcing material to improve mechanical strength. The

non-foamed layers

821 and 822 may have a thickness of 0.1 to 5.0 mm. The

non-foamed layers

821 , 822 may have a length between 2 and 30 mm.

Since the fiber glass scrim layers 831 and 832 have the form of glass fibers woven in a lattice shape 833, both the transverse and longitudinal directions of tensile modulus are excellent. Glass fiber scrim layers 831 and 832 may have a thickness of 0.02 to 2.0 mm.

The

non-woven layers

841 and 842 are made of a non-woven fabric made of PP or PET since they must match the materials of the core foam layer 810 and the

non-foamed layers

821 and 822. The

nonwoven layers

841 and 842 may have a black color. Nonwoven layers 841 and 842 may have a thickness of 0.05 to 5.0 mm. When the glass fiber scrim layers 831 and 832 are laminated to fit between the

non-foamed layers

821 and 822 and the

non-woven layers

841 and 842, the non-foamed layer resin melt is formed of the glass fiber scrim layers 831 and 832. Since it passes through the lattice and comes into direct contact with the

nonwoven layers

821 and 822, there is no problem in interfacial adhesion of the multilayer structure.

9 illustrates a manufacturing process of a panel for a luggage board of a vehicle according to various embodiments of the present disclosure. Specifically, FIG. 9 shows a process of manufacturing the panel for the luggage board of the seven-layer structure of FIG. 8 .

As a basic material, PP/PET resin, which is a general-purpose thermoplastic resin, that is, PP or PET resin is used. The PP/PET resin is fed through the extruder hopper 903 .

As the additive, the nucleating agent and the foaming agent should be introduced through the foaming agent tank 901 and the foaming agent input device 902 and mixed with the PP/PET resin in the manner described in detail above.

Foam discharged from a tandem foaming extruder (904, 905) is used as a material for the core foam layer. The core foam layer has a thickness of 5 mm to 50 mm, and the density of the core foam layer corresponds ^{to 20 kg/m 3} to 400 kg/m ^{3 .}

The non-foaming PP/PET resin layer is fed through the sub-extruder 906 . Using the coextrusion die 907, the non-foamed PP/PET resin layer can be extruded simultaneously with the core foam layer.

The three resin layers to be co-extruded, that is, the resin of the A-B-A structure, enters the calibrator 910 for cooling and shaping.

Just before the co-extruded ABA-structured resin enters the calibrator 910,

glass fiber scrims

911 and 912 and

nonwoven fabrics

908 and 909 are supplied and laminated on both sides of the resin for lamination, that is, Lamination.

Resin A of the non-foaming layer is still hot and fluid when entering the calibrator 910 . Accordingly, the

glass fiber scrims

911 and 912 and the non-woven fabric layers 908 and 909 serving as surface finishing materials serve as an adhesive layer so that they can be well adhered to the core foam layer.

The calibrator 910 cools the multi-layered sandwich board and simultaneously performs suction in a vacuum so that smoothness and appearance of the board are well maintained.

If the cooling in the calibrator 910 is insufficient, a post-deformation problem may occur, so that the temperature control of the calibrator 910 and the device length should be optimized so that sufficient cooling can be achieved.

The panel of the sandwich structure coming out through the calibrator 910 is cut to an appropriate size and shape by the board cutting device 913 .

The cut board panel 914 may be used as a car trunk luggage board panel.

Specifically, FIG. 10 shows in more detail the coextrusion die and the calibrator section in the manufacturing process of the panel 1009 for the luggage board of the vehicle of FIG. 9 described above.

The non-foaming layer resin is fed into the co-extrusion die 1000 through the non-foaming layer resin inlet 1001 together with the core foam resin 1002 . The coextrusion die 1000 discharges the non-foaming layer resin-core foam resin-non-foaming layer resin, that is, A-B-A resin.

The

glass fiber scrims

1005 and 1006 and the nonwoven fabrics 1003 and 1004 are laminated on both sides of the A-B-A resin discharged from the co-extrusion die 1000, and the process of entering the

caribrators

1007 and 1008 at the same time is shown.

Hereinafter, various embodiments of the present invention will be described. The following examples are only exemplary embodiments of the present invention, and the present invention is not limited to the following examples.

(Example 1)

Using PP as a base resin, a panel for a luggage board of an automobile having an overall thickness of about 20 mm was manufactured.

The core foam resin was extruded through a tandem foaming extruder in which a primary extruder and a secondary extruder having extruder screw diameters of 150 mm and 180 mm, respectively, were connected in series. At the same time as the core foam resin was put into the co-extrusion die, a non-foaming layer resin containing 10 parts by weight of crushed glass fibers was introduced into the co-extrusion die through a sub-extruder having a screw diameter of 130 mm.

A resin having a three-layer A (non-foaming PP)-B (core foam PP)-A (non-foaming PP) structure was discharged through a co-extrusion die, that is, a co-extrusion T-die. The resin of the three-layer structure discharged through the co-extrusion die was made of PP resin in all layers, the density of the core foam layer was 60 kg/m 3 , and the thickness of the core foam layer was 16 mm. The thickness of the non-foamed layers on both sides of the core foam layer was 1 mm each.

Just before the 3-layer ABA resin discharged from the die of the tandem foam extruder enters the calibrator, a cooling device, a non-woven fabric made of PP material (thickness 1mm), which is a finishing material for the car luggage board panel, is laminated and adhered to both surfaces of the ABA resin. became

The board panel of the multi-layer structure cooled in the calibrator was cut into a regular rectangular shape, and then cut to the final dimensions and shape.

Since the entire luggage board panel is made of a single material of PP, it was possible to recycle the luggage board panel by crushing it with a simple shredding device at the recycling stage.

(Example 2)

Compared with the above-mentioned Example 1, when the non-woven fabric of the PP material is laminated with the ABA resin, the process is designed so that a fiberglass scrim having a thickness of 0.5 mm is inserted between the non-foaming layer and the non-woven fabric layer. manufactured a panel for a luggage board of an automobile with the same equipment, process, and material as in Example 1.

Due to the glass fiber scrim added as a reinforcing material, compared to the luggage board panel manufactured in Example 1, the luggage board panel manufactured in Example 2 showed significantly improved bending stiffness.

Since the entire panel for luggage board is made of a single material of PP, it was possible to recycle the panel by crushing it with a simple shredding device at the recycling stage. Since the glass fiber scrim used as the reinforcing material is crushed together with the resin in the crushing process, there is no problem in the process of re-melting and recycling crushed chips.

(Example 3)

Compared to Example 2, a panel for luggage board was manufactured using the same equipment, process and material as in Example 2, except that PET resin was used as the base resin instead of PP resin and a non-woven fabric made of PET material was used. prepared.

Since the entire panel for luggage board is made of a single PET material, it was possible to recycle the panel by crushing it with a simple shredding device at the recycling stage. Since the glass fiber scrim used as the reinforcing material is crushed together with the resin in the crushing process, there is no problem in the process of re-melting and recycling crushed chips.

A panel for a luggage board according to various embodiments of the present invention includes a core foam layer composed of an extruded foam of polypropylene (PP) resin or polyethylene terephthalate (PET) resin; two non-foaming layers disposed on each of both surfaces of the core foam layer and composed of a non-foaming material of the same resin as the core foam layer; two glass fiber scrim layers disposed by lamination to the outer surface of each of the two non-foamed layers; and two nonwoven layers disposed by being laminated to the outer surface of each of the two glass fiber scrim layers and made of the same resin as the core foam layer. According to an embodiment, the thickness of the core foam layer is 5 mm to 50 mm, and the density of the core foam layer is 20 kg/m ³ to 400 kg/m ³ . According to an embodiment, the thickness of each of the non-foaming layers is 0.1 mm to 5 mm, and 2 to 40 parts by weight of crushed glass fiber as a reinforcing material is added to each of the non-foaming layers and uniformly dispersed. According to an embodiment, the thickness of each of the glass fiber scrim layers is between 0.02 mm and 2 mm. According to an embodiment, the thickness of each of the nonwoven layers is 0.05 mm to 5 mm.

A method of manufacturing a panel for a luggage board according to various embodiments of the present invention includes a process of injecting polypropylene (PP) resin or polyethylene terephthalate (PET) resin into a tandem foaming extruder in which a primary extruder and a secondary extruder are connected in series; , The process of adding 1 to 10 parts by weight of one or more of propane, butane, pentane, or carbon dioxide as a blowing agent to the tandem foaming extruder, and talc, calcium carbonate, titanium dioxide, aluminum hydroxide as a nucleating agent to the tandem foaming extruder The process of adding 0.2 to 5 parts by weight of at least one of the steps, the process of extruding a core foam layer composed of an extruded foam of PP resin or PET resin through the tandem foam extruder, and the process of extruding a PP resin or PET resin through a sub-extruder The process of extruding a non-foaming layer of the same resin as the core foam layer, and the first non-foaming layer, the core foam layer, and the second non-foaming layer through a co-extrusion die connected to the tandem foaming extruder and the sub-extruder The process of discharging the layer structure resin, the process of putting the three-layer structure resin into the calibrator for cooling, and the glass fiber scrim and the nonwoven fabric on both sides of the three-layer structure resin at the same time together with the three-layer structure resin and laminating the glass fiber scrim and the nonwoven fabric on each of both outer sides of the three-layer structure resin by putting it into the calibrator.

The panel for a luggage board according to various embodiments of the present invention is manufactured as an entire component layer using the same type of resin selected from PP (polypropylene) or PET (polyethylene terephthalate) resin as a whole, so that when a vehicle is scrapped, parts has a very high recyclability. This is because the material of the non-woven fabric used as the surface finishing material can also be selected from PP or PET resin to match the resin of the foamed core layer and the non-foamed layer, and the non-foamed resin layer is made of glass fibers to reduce weight. It has a function of remarkably improving the mechanical strength such as the flexural modulus of the base board panel.

A method for manufacturing a panel for a luggage board according to various embodiments of the present invention includes selecting one of PP or PET resin, which is a general-purpose thermoplastic resin, and foaming a core foam layer at a high magnification through a foaming extrusion device and A thin, non-foaming layer containing glass fibers is co-extruded on both sides of the core foam layer, and at the same time as the core foam layer and the non-woven fabric layer of the same resin type are laminated on both surfaces at the same time, it is a lightweight and inexpensive luggage in a single continuous process. Board panels can be manufactured. Basically, since the coextrusion foaming process, which is a continuous process, is used, product productivity is very high. In addition, in order to further improve the bending rigidity of the final board panel, a fiberglass scrim can be added between the non-foaming layer and the non-woven layer, which is a finishing material, so that the range of allowable mechanical strength can be significantly expanded. also have

It will be apparent to those skilled in the art that the present invention can be embodied in other forms without departing from the spirit and essential characteristics of the present invention. Accordingly, the above embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention should be determined by a reasonable interpretation of the appended claims and all possible changes within the equivalent scope of the present invention.

The present invention relates to a panel for a luggage board of an automobile and a method for manufacturing the same. Specifically, the present invention relates to a panel for a luggage board of an automobile composed of polypropylene (PP) or polyethylene terephthalate (PET) foam, and a multi-layer structure formed through a single process, and a manufacturing method thereof. In the panel for luggage board according to various embodiments of the present invention, the core is made of polypropylene (PP) or polyethylene terephthalate (PET) resin foam, and the entire part is recycled as it is by finishing the surface with the same material as the core foam. It is characterized in that this is possible. In addition, it is characterized in that the manufacturing cost is low because the board of the multi-layer structure is formed through a single process.

Claims

In a panel for a luggage board of a vehicle,

a core foam layer composed of an extruded foam of PP (polypropylene) resin or PET (polyethylene terephthalate) resin;

two non-foaming layers disposed on each of both surfaces of the core foam layer and composed of a non-foaming material of the same resin as the core foam layer;

two glass fiber scrim layers disposed by lamination to the outer surface of each of the two non-foamed layers; and

comprising two nonwoven layers made of the same resin as the core foam layer, disposed by being laminated to the outer surface of each of the two glass fiber scrim layers.

Luggage board panels.
The method according to claim 1,

The thickness of the core foam layer is 5mm to 50mm,

The density of the core foam layer is 20 kg / m 3 to 400 kg / m 3 is,

Panels for luggage boards.
The method according to claim 1,

The thickness of each of the non-foaming layers is 0.1 mm to 5 mm,

2 to 40 parts by weight of crushed glass fiber as a reinforcing material is added to each of the non-foaming layers and uniformly dispersed,

Luggage board panels.
The method according to claim 1,

the thickness of each of the glass fiber scrim layers is 0.02 mm to 2 mm;

Luggage board panels.
The method according to claim 1,

The thickness of each of the nonwoven layers is 0.05 mm to 5 mm,

Luggage board panels.
In the manufacturing method of a panel for a luggage board of a vehicle,

The process of injecting PP (polypropylene) resin or PET (polyethylene terephthalate) resin into a tandem foaming extruder in which the primary extruder and the secondary extruder are connected in series;

The process of adding 1 to 10 parts by weight of at least one of propane, butane, pentane, and carbon dioxide as a foaming agent to the tandem foaming extruder;

The process of adding 0.2 to 5 parts by weight of at least one of talc, calcium carbonate, titanium dioxide, and aluminum hydroxide as a nucleating agent to the tandem foaming extruder;

The process of extruding a core foam layer composed of an extruded foam of PP resin or PET resin through the tandem foam extruder;

A process of extruding a non-foaming layer of the same resin as the core foam layer of PP resin or PET resin through a sub-extruder;

The process of discharging the three-layer structure resin of the first non-foaming layer, the core foam layer, and the second non-foaming layer through the coextrusion die connected to the tandem foaming extruder and the sub-extruder;

The process of putting the three-layer structure resin into the calibrator for cooling;

By putting the glass fiber scrim and the nonwoven fabric on both outer sides of the three-layer structure resin together with the three-layer structure resin into the calibrator at the same time, the glass fiber scrim and the non-woven fabric on both outer sides of the three-layer structure resin, respectively Including the process of lamination,

method.