KR101499063B1 - The vehicle floor mat and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a vehicle floor mat which comprises: a second sheet formed by mixing 94.7-95 wt% of a second raw material including 84.1-85 wt% of low density polyethylene, 11.5-12.4 wt% of fillers, 1.6-1.8 wt% of oxidizing agents and 1.6-1.8 wt% of accelerative activators, 3.7-4 wt% of foaming agents and 1.2-1.4 wt% of cross-linking agents; and 94.7-95 wt% of a first sheet formed by mixing 84.1-85 wt% of ethylene vinyl acetate, 11.5-12.4 wt% of fillers, 1.6-1.6 wt% of oxidizing agents and 1.6-1.8 wt% of accelerative activators, 3.7-4 wt% of foaming agents and 1.2-1.4 wt% of cross-linking agents. The present invention performs cross-linking and foaming by compressing a press in a condition that arranges the first sheets on an upper side and a lower side of the second sheet. The cross-linking agent is odorless. The fillers include 5.3-6 wt% of red clay and 6.2-6.4 wt% of calcium carbonate. The vehicle floor mat and a manufacturing method thereof stably protect a vehicle floor by performing cross-linking and foaming by compressing a press in a condition that arranges the first sheets including ethylene vinyl acetate, fillers, oxidizing agents, accelerative activators, foaming agents and cross-linking agents on an upper side and a lower side of the second sheet including low density polyethylene, fillers, oxidizing agents, accelerative activators, foaming agents and cross-linking agents and reduces ingredients harmful to human bodies by having deodorization and antibacterial performance.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mat for a vehicle floor,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a mat for an automobile floor installed on the floor of an automobile and collecting dust or moisture, and a method of manufacturing the same.

Generally, mats used in the floor of automobiles are mainly made of fiber fabric, rubber, and metal. However, such automobile mats have a problem that it is difficult to collect dirt, dust and water, or to wash or dry contaminated mats again.

Therefore, in order to solve the above problems, a mat of ethylene vinyl acetate (EVA) is used. Such an ethylene vinyl acetate mat is advantageously excellent in all of the restoring force and buffering force since it is not necessary to use an adhesive and hardness of the inside and the inside is almost same because it is used after being cut and cut by press foaming with a 20 to 30 mm disk using a mold. However, there is a problem in that a relatively large amount of filler for foaming is required and crosslinking is very large, which is very difficult and heavy to recycle, has a pungent odor peculiar to ethylene vinyl acetate resin, and a volatile harmful component is relatively large. In addition, since the foamed ethylene vinyl acetate mat is cut horizontally and the bottom surface is used in a flat state, the shock absorbing force is decreased, and a lot of soil, dust and water are adhered to the bottom surface.

Such a conventional method of manufacturing a mat for an automobile is disclosed in Korean Patent Publication No. 1274647 (Feb.

An object of the present invention is to provide an automotive floor mat which is capable of stably collecting soil, dust, and moisture as well as cleaning and drying, and a method of manufacturing the same.

The present invention relates to a process for producing a kneaded product by mixing and kneading a first raw material composed of ethylene vinyl acetate, a filler, an oxidizing agent and an activity promoter and a second raw material composed of a low density polyethylene, a filler, an oxidizing agent and an activity promoter, Mixing and kneading a foaming agent and a cross-linking agent into a second raw material, kneading the first raw material and the second raw material by rolling with a rolling machine to form a first sheet and a second sheet, Aging the two sheets, and arranging the first sheet on the upper and lower surfaces of the second sheet, respectively, followed by crosslinking and foaming while pressing with a press machine.

According to another aspect of the present invention, there is provided a process for producing a polyurethane foam comprising 94.7 to 95 wt% of a second raw material mixed with 84.1 to 85 wt% of low density polyethylene, 11.5 to 12.4 wt% of a filler, 1.6 to 1.8 wt% of an oxidizer, 1.6 to 1.8 wt% A second sheet formed by mixing 3.7 to 4 wt% of a blowing agent and 1.2 to 1.4 wt% of a crosslinking agent and a second sheet comprising 84.1 to 85 wt% of ethylene vinyl acetate, 11.5 to 12.4 wt% of a filler, 1.6 to 1.8 wt% of an oxidizing agent, 1.6 to 1.8 And a first sheet prepared by mixing 3.7 to 4 wt% of a foaming agent and 1.2 to 1.4 wt% of a crosslinking agent in 94.7 to 95 wt% of a first raw material mixed in an amount of 1 wt% to 1 wt% Wherein the crosslinking agent is an odorless crosslinking agent, and the filler is composed of 5.3 to 6 wt% of loess powder and 6.2 to 6.4 wt% of calcium carbonate. Jean provides car mats for the floor.

An automotive floor mat and a method of manufacturing the same according to the present invention are characterized in that an upper surface and a lower surface of a second sheet made of low density polyethylene, a filler, an oxidizing agent, an activator, a foaming agent and a crosslinking agent are coated with ethylene vinyl acetate, a filler, , And a first sheet formed of a crosslinking agent is laminated on the first sheet. The first sheet is formed with a concave groove of a honeycomb structure to collect soil, dust and moisture, and the crosslinking agent is an odorless crosslinking agent , The filler includes loess powder, and stably protects the floor of the vehicle, and has deodorizing and antibacterial performance, thereby providing an effect of reducing human harmful components.

1 is a flowchart illustrating a method of manufacturing a mat for an automobile floor according to an embodiment of the present invention.
2 is a perspective view illustrating an automotive floor mat according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

1 is a flowchart illustrating a method of manufacturing a mat for an automobile floor according to an embodiment of the present invention. Referring to FIG. 1, the method for manufacturing a floor mat for an automobile comprises the steps of mixing first and second raw materials (S100), kneading first and second raw materials (S110) A step S120 of forming two sheets, a step S130 of aging the first and second sheets, and a step S140 of crosslinking foaming in a state that the first sheet is disposed on the upper and lower surfaces of the second sheet .

First, a first raw material composed of ethylene vinyl acetate, a filler, an oxidizing agent, and an activity promoter, and a second raw material composed of a low density polyethylene, a filler, an oxidizer, and an activity promoter are put in a preheated reader (Kneader). At this time, the first raw material is composed of 84.1 to 85 wt% of the ethylene vinyl acetate, 11.5 to 12.4 wt% of a filler, 1.6 to 1.8 wt% of an oxidizer, and 1.6 to 1.8 wt% of an active promoter. The second raw material is composed of 84.1 to 85 wt% of the low density polyethylene, 11.5 to 12.4 wt% of a filler, 1.6 to 1.8 wt% of an oxidizer, and 1.6 to 1.8 wt% of an active promoter.

Here, the ethylene vinyl acetate has a restoring force and a buffering power, and the low-density polyethylene has water resistance, chemical resistance, and electrical insulation.

Here, the filler has eco-friendliness to the raw material and lowers the density of the raw material. Therefore, when the amount of the filler is less than 11.5% by weight, the effect of reducing the environmental friendliness and the density of the first and second raw materials is inferior. When the filler content is more than 12.4% by weight, the water resistance, chemical resistance and electrical insulation properties of the low- do. The filler may be at least one selected from the group consisting of loess powder, white carbon, calcium carbonate, and magnesium carbonate. In this case, the filler is composed of loess powder and calcium carbonate. At this time, the filler is composed of 5.3 to 6 wt% of loess powder and 6.2 to 6.4 wt% of calcium carbonate. If the amount of the loess powder is less than 5.3 wt%, the eco-friendly property is lowered. If the amount of the loess powder is more than 6 wt%, the effect of reducing the density of the first and second raw materials by the elastic calcium is inferior. If the amount of the calcium carbonate is less than 6.2 wt%, the effect of reducing the density of the first and second raw materials is lowered. If the amount of the calcium carbonate is more than 6.4 wt%, the eco-friendly property due to the loess powder is lowered.

The oxidizing agent increases the thermal conductivity of the first and second raw materials, thereby improving workability. If the oxidizing agent is less than 1.6 wt%, the thermal conductivities of the first and second raw materials are lowered. If the oxidizing agent is higher than 1.8 wt%, the strength of the first and second sheets formed from the first and second raw materials is weakened. Such oxidizing agent uses zinc oxide.

The active promoter improves the dispersibility and workability of the components of the first and second raw materials. When the active promoter is used in an amount of less than 1.6% by weight, the dispersibility and workability of the active promoter are lowered, thereby reducing the tensile and elongation. If the active promoter is used in an amount exceeding 1.8% by weight, The properties of ethylene vinyl acetate and the low-density polyethylene are weakened. Here, stearic acid is used in combination as the active promoter.

Thus, the second raw material composed of the first raw material composed of the ethylene vinyl acetate, the filler, the oxidizer and the active promoter, and the second raw material composed of the low density polyethylene, the filler, the oxidizer, and the activity promoter is put in a preheated reader Kneader, , And the first raw material and the second raw materials are mixed and kneaded for 10 to 12 minutes in a reader preheated to 125 to 135 占 폚.

After the first and second raw materials are mixed and kneaded (S100), the first and second raw materials are kneaded in a mixing roll (S110). At this time, the first and second raw materials are kneaded 5 to 7 times in a pre-heated mixing roll at 85 to 95 ° C. Here, the mixing rolls knead the first and second raw materials at 10 to 25 rpm for 1 to 3 minutes each. When mixing the first and second raw materials into the mixing roll and kneading them, a foaming agent and a cross-linking agent are added. At this time, 3.7 to 4 wt% of the foaming agent and 1.2 to 1.4 wt% of the crosslinking agent are added to 94.7 to 95 wt% of the first raw material and the second raw material, respectively.

Here, the blowing agent has a property of generating bubbles on the first and second raw materials to absorb impacts. If the amount of the blowing agent is less than 3.7% by weight, bubbles are reduced and the impact absorbing ability is lowered. When the amount of the blowing agent is more than 4% by weight, many bubbles are generated, so that the impact absorbing power is excellent but the strength is weakened. Here, the blowing agent uses a blowing agent of the JTR type having excellent micro-foaming structure and physical properties.

The cross-linking agent facilitates the chemical bonding of the respective components of the first and second raw materials to have mechanical strength and chemical stability. If the amount of the cross-linking agent is less than 1.2% by weight, chemical bonding to the respective components of the first and second raw materials may not be stably performed. If the amount of the cross-linking agent is more than 1.4% by weight, ethylene vinyl acetate and / The characteristics of the low-density polyethylene are weakened. The cross-linking agent generally uses DCP (Dicumyl peroxide), which is an organic peroxide. Generally, irritating harmful components and odors such as Acetone, Acetopheone, and α-Cumyl alcohol are generated in the reaction. Therefore, an odorless cross- desirable.

After the step S110, the kneaded first and second raw materials are rolled to a predetermined thickness to form a first sheet and a second sheet, respectively (S120). That is, the kneaded first and second raw materials are each put into a rolling machine and formed into a sheet having a thickness of 2 to 2.2 mm. At this time, the rolling mill keeps its preheated state at 95 to 105 ° C. The first and second raw materials, which are respectively molded into the first sheet and the second sheet in the rolling mill, are manufactured to have lateral and longitudinal sizes that can be seated on the mold of the press during the subsequent crosslinking and foaming step.

After the first and second raw materials are molded (S120), the first and second sheets are aged (S130). That is, the first and second sheets are put into a drying apparatus, respectively, and cooled while blowing air at 40 to 50 ° C to stabilize the structure.

When the first and second sheets are aged (S130), the first and second sheets are crosslinked and foamed while being pressed by a press machine (S140). The first and second sheets thus aged are weighed in a state in which a plurality of the first and second sheets are laminated. That is, the first sheet is disposed on the upper surface and the lower surface of the second sheet, respectively, and pressed by the press machine provided with the upper mold and the lower mold so as to be crosslinked and foamed. At this time, the press machine presses the first and second sheets laminated in a state preheated at 165 to 175 ° C under a pressure of 145 to 150 kgf / cm ² for 30 to 40 minutes. At this time, a protrusion of a honeycomb structure is formed on each of the upper mold and the lower mold of the press machine, and when the first and second sheets are laminated, Thereby forming a honeycomb structure in one sheet.

After the first sheet is laminated on the upper surface and the lower surface of the second sheet, the sheet is pressed by a press machine to be crosslinked and foamed, cut to a predetermined size according to the intended use, So that the mat for the floor of the automobile is completed. The finished automotive floor mat may have a thickness of 10 to 15 mm, but is not limited thereto.

2, the first sheet 100 and the second sheet 200 are stacked on the upper surface and the lower surface of the second sheet 200, respectively, (100) is subjected to crosslinking foam molding under pressure by a press machine to produce an automobile floor mat which is mutually bonded. The second sheet 200 may include 94.7 to 95 wt% of a second raw material mixed with 84.1 to 85 wt% of low density polyethylene, 11.5 to 12.4 wt% of a filler, 1.6 to 1.8 wt% of an oxidizer, and 1.6 to 1.8 wt% Wherein the first sheet 100 is composed of 84.1 to 85% by weight of ethylene vinyl acetate, 11.5 to 12.4% by weight of a filler, 1.6 to 1.8% by weight of an oxidizing agent, , 3.7 to 4 wt% of a blowing agent, and 1.2 to 1.4 wt% of a crosslinking agent are blended into 94.7 to 95 wt% of a first raw material mixed with 1.6 to 1.8 wt% of an activator. Here, the crosslinking agent is an odorless crosslinking agent, and the filler is composed of 5.3 to 6 wt% of loess powder and 6.2 to 6.4 wt% of calcium carbonate. The first sheet 100, which is formed by cross-linked foam molding, has a concave groove of a honeycomb structure. The automobile floor mat thus shaped absorbs various shocks and vibrations, and is excellent in waterproofing, heat insulation performance, and heat resistance, thereby stably protecting the floor of an automobile. In addition, the crosslinking agent is an odorless crosslinking agent which does not use DCP which is an organic peroxide and has odorlessness. The filler contains deodorant and antibacterial performance by mixing fine loess powder with a particle size of not less than 325 mesh, Thereby providing an effect of reducing the component. In addition, the first sheet 100 stably collects soil, dust, and moisture with concave grooves of the honeycomb structure, and is easy to clean and dry.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (10)

delete Mixing a first raw material composed of ethylene vinyl acetate, a filler, an oxidizing agent and an activity promoter, and a second raw material composed of a low density polyethylene, a filler, an oxidizing agent, and an activity promoter;
Adding and kneading a foaming agent and a cross-linking agent to the kneaded first raw material and the second raw material, respectively;
Rolling the kneaded first raw material and the second raw material with a rolling machine to form a first sheet and a second sheet;
Aging the first sheet and the second sheet; And
And arranging the first sheet on the upper surface and the lower surface of the second sheet, respectively, followed by crosslinking and foaming while pressing with a press machine,
Wherein the first raw material comprises 84.1 to 85 wt% of ethylene vinyl acetate, 11.5 to 12.4 wt% of filler, 1.6 to 1.8 wt% of oxidizer, and 1.6 to 1.8 wt% of active promoter. Mixing a first raw material composed of ethylene vinyl acetate, a filler, an oxidizing agent, and an activity promoter, and a second raw material composed of a low density polyethylene, a filler, an oxidizing agent, and an activity promoter;
Adding and kneading a foaming agent and a cross-linking agent to the kneaded first raw material and the second raw material, respectively;
Rolling the kneaded first raw material and the second raw material with a rolling machine to form a first sheet and a second sheet;
Aging the first sheet and the second sheet; And
And arranging the first sheet on the upper surface and the lower surface of the second sheet, respectively, followed by crosslinking and foaming while being pressed by a press machine,
Wherein the second raw material comprises 84.1 to 85 wt% of low density polyethylene, 11.5 to 12.4 wt% of filler, 1.6 to 1.8 wt% of oxidizer, and 1.6 to 1.8 wt% of active accelerator. The method according to claim 2 or 3,
The step of mixing and kneading the first raw material and the second raw material comprises mixing the first raw material and the second raw material in a reader preheated at 125 to 135 DEG C for 10 to 12 minutes, . The method according to claim 2 or 3,
Wherein the step of kneading the one raw material and the second raw material comprises:
3.7 to 4% by weight of the foaming agent and 1.2 to 1.4% by weight of the crosslinking agent are added to 94.7 to 95% by weight of the first raw material, 3.7 to 4% by weight of the foaming agent, 1.2 to 1.4 By weight,
Wherein the first raw material containing the foaming agent and the crosslinking agent and the second raw material are kneaded 5 to 7 times in a preheated mixing roll at 85 to 95 占 폚. The method according to claim 2 or 3,
Placing the first sheet on the upper surface and the lower surface of the second sheet, respectively, and then performing crosslinking foaming while pressing the sheet with a press machine;
Wherein the upper mold and the lower mold of the press machine each have protrusions of a honeycomb structure and are pressurized at a pressure of 145 to 155 kgf / cm ² for 30 to 40 minutes on the press machine preheated at 165 to 175 ° C, ≪ / RTI > The method according to claim 2 or 3,
Wherein the filler is a mixture of 5.3 to 6 wt% of loess powder and 6.2 to 6.4 wt% of calcium carbonate. The method according to claim 2 or 3,
Wherein the crosslinking agent is an odorless crosslinking agent. 3.7 to 4% by weight of a blowing agent, 1.2 to 1.2% by weight of a crosslinking agent 1.2 to 94.7 to 95% by weight of a second raw material mixed with 84.1 to 85% by weight of low density polyethylene, 11.5 to 12.4% by weight of a filler, 1.6 to 1.8% by weight of an oxidizing agent and 1.6 to 1.8% To 1.4% by weight of the first sheet;
3.7 to 4 wt% of a foaming agent, 94.7 to 95 wt% of a first raw material mixed with 84.1 to 85 wt% of ethylene vinyl acetate, 11.5 to 12.4 wt% of a filler, 1.6 to 1.8 wt% of an oxidizer, and 1.6 to 1.8 wt% 1.2 to 1.4% by weight of the first sheet,
And the first sheet is disposed on the upper surface and the lower surface of the second sheet,
Wherein the crosslinking agent is an odorless crosslinking agent and the filler comprises 5.3 to 6 wt% of loess powder and 6.2 to 6.4 wt% of calcium carbonate. The method of claim 9,
A mat for an automobile floor having a concave groove of a honeycomb structure formed on the first sheet subjected to cross-linked foam molding.

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