KR100817986B1 - Eco-friendly Flooring - Google Patents

Abstract

The present invention relates to an eco-friendly flooring, and more particularly, to an eco-friendly flooring of a laminated structure including a layer prepared using a resin composition for non-halogen-based flooring.

Eco-Friendly Flooring, Resin Composition

Description

Eco-Friendly Flooring {Eco-friendly Flooring}

The present invention relates to an eco-friendly flooring, and more particularly, to an eco-friendly flooring of a laminated structure including a layer prepared using a resin composition for non-halogen-based flooring.

Currently commonly used flooring is largely divided into PVC sheet and wood-based flooring, commonly referred to as cerium.

PVC used for flooring is soft PVC, and various plasticizers, viscosity lowering agents, organic solvents, etc., including phthalate-based plasticizers known to be harmful to the human body are used to impart PVC processability and flexibility.

On the other hand, wood-based flooring materials generally used as flooring materials for houses include solid wood floor, plywood floor, and reinforced floor, and solid wood floors are usually laminated with veneers of 5 to 7 veneers. It is a flooring material, and plywood flooring is a flooring material having the same composition or surface layer as the solid wood flooring, which is generally about 0.6 mm. The reinforced floor is a flooring material having a decorative sheet attached to a surface of a medium density fiberboard (MDF) or a high density fiberboard (HDF).

Generally, these wood based flooring materials using wood materials have been recognized as eco-friendly materials, but in fact, they are not. The plywood layer constituting the wood floor or plywood floor uses urea resin or melamine resin as an adhesive when the plywood layers are bonded. Is made. Therefore, formaldehyde is basically inherent in these resins. In addition, since MDF or HDF, which is a constituent layer of reinforcement floor, is formed by polymerization of phenol and formaldehyde, phenol resins generally used at the time of manufacturing thereof also formally intrinsic to formaldehyde.

In addition, solid wood floor, plywood floor and reinforced floor all contain a volatile organic compound because the decorative surface layer is adhered to the plywood layer or MDF by using an adhesive using an organic solvent.In addition, wood, which is a component of the plywood layer and MDF, To prevent rot, use it after prolonged deposition in formalin solution for the first time and dried. Therefore, contrary to what is known as an environmentally friendly material, wood flooring is a factor that worsens sick house syndrome.

  The present invention is to solve the conventional problems as described above, an object of the present invention is to use an olefin resin and polyester fibers without using a plasticizer, etc., thereby reducing the emission of formaldehyde or organic compounds eco-friendly flooring To provide.

Flooring according to the present invention is composed of a three-layer structure of the upper layer, the middle layer and the lower layer, the upper layer and the lower layer is made of a resin composition comprising a polypropylene copolymer and a polyolefin elastomer, the intermediate layer is a non-halogen made of polyester fibers It is characterized in that the system-friendly flooring.

In the flooring of the present invention, the polypropylene copolymer used in the upper layer and the lower layer preferably has an ethylene content of 0.5 to 30% by weight and a melt flow index (Melt Index) of 0.3 to 30 g / 10 minutes. If out of the range, the viscosity of the resin rises and there is a disadvantage in that the processability of the kneader or the extruder when the resin composition is prepared, the melt flow index is less than 0.3g / 10min, the flowability of the resin is lowered, 30g / 10min If it exceeds, the mechanical properties of the resin are lowered, which is not preferable.

In the flooring of the present invention, the polyolefin elastomer used in the upper layer and the lower layer preferably has a density of 0.85-0.90 g / cm 3 and a melt flow index (Melt Index) of 0.1-30 g / 10 min, with a density of 0.85 g / m. If it is less than 3 cm 3, the extrusion workability of the resin is lowered, and if it exceeds 0.90 g / cm 3, the impact strength is lowered, which is undesirable. If the melt flow index is less than 0.1 g / 10 min, the flowability of the resin is 30 g / 10. If the amount is exceeded, mechanical properties such as flexural rigidity and impact strength of the resin are lowered, which is not preferable.

In the flooring material of the present invention, the polyester fiber used in the intermediate layer is preferably an average particle diameter of 5 ~ 15㎛, because it is preferable to be processed into a mat state into long fibers to be used. When the average particle diameter of the polyester fiber is out of the above range, the mat molding is lowered, which is not preferable.

The content of the polypropylene copolymer, polyolefin elastomer and polyester fiber included in the flooring of the present invention is 20 to 70% by weight of polypropylene copolymer, 1 to 50% by weight of polyolefin elastomer, polyester fiber based on the total weight of the flooring material. It is preferable that it is 10 to 50 weight%, and since it is inferior to the workability of a flooring material beyond the said range, it is not preferable.

 The flooring material of the present invention can be produced, for example, by the following specific method.

First, the polypropylene copolymer and polyolefin elastomer forming the upper and lower layers of the flooring material are mixed using a kneader or a banbury mixer at a temperature above the melting point of the resin. Next, the mixed resin composition is placed directly from the kneader to the extruder hopper, and directly added to the melt state, or pulverized to a suitable size with a resin crusher, and then introduced into the extruder in a solid state. When the dosing is completed, the mixed resin composition is extruded into pellets using a single-screw or twin-screw extruder at a temperature above the melting point of the resin, such as 120 to 230 ° C. Manufacture. If the extrusion temperature is lower than 120 ° C, the resin will not be sufficiently melted, and the resin melt pressure will be excessively increased, making extrusion difficult. If the extrusion temperature is higher than 230 ° C, the resin will be easily melted, but the resin will be easily oxidized. . The pellet sample prepared in this way is sufficiently dried using a dryer, and then an appropriate amount of pellets are put into a roll mill and molded into a sheet shape under the conditions of 140 to 190 ° C. and 5 to 30 kgf / cm 2. The upper layer and the lower layer included in the flooring of each can be prepared.

In addition, the intermediate layer of the flooring of the present invention can be produced by processing the polyester fibers in a mat, cross-shaped, horizontal / vertical arrangement, wherein the bonding between the polyester fibers is made by thermal fusion.

The flooring material of the present invention can be produced by laminating the upper layer, the intermediate layer, and the lower layer prepared as described above by thermal bonding.

Hereinafter, the present invention will be described in detail through Examples and Comparative Examples, but the scope of the present invention is not limited by these Examples and Comparative Examples.

Example  And Comparative example

Example  1-19 and Comparative example  1 ~ 2

With the composition shown in Table 1, the flooring was prepared by thermally bonding the upper layer consisting of a polypropylene copolymer and a polyolefin elastomer, and the middle layer consisting of an upper layer and a middle layer and a polyester fiber so as to have a structure of an upper layer, an intermediate layer, and a lower layer. The amount of formaldehyde dissipation was measured according to KS F3111, and the results are shown in Table 1 together.

Property measurement method

① Melt Index

According to ASTM D1238 it was measured with a load of 2.16 kg at 230 ℃.

Table 1

Polypropylene Copolymer Polyolefin elastomer Polyester fiber Formaldehyde Dissipation (mg / ℓ) Ethylene Content (wt%) / MI (g / 10min) Content (% by weight) Density / MI (g / 10min) Content (% by weight) Content (% by weight) Comparative Example 1 ¹⁾ - - - - - 1.5 Comparative Example 2 ²⁾ - - - - - 0.8 Example 1 0.5 / 0.3 69 0.85 / 0.1 One 30 0 Example 2 30/30 60 0.85 / 0.1 10 30 0 Example 3 0.5 / 0.3 50 0.85 / 0.1 20 30 0 Example 4 10/5 40 0.88 / 2.0 30 30 0 Example 5 10/5 20 0.88 / 2.0 50 30 0 Example 6 10/5 40 0.88 / 2.0 30 30 0 Example 7 10/5 40 0.90 / 2.0 30 30 0 Example 8 10/5 40 0.90 / 2.0 30 30 0 Example 9 10/5 40 0.90 / 2.0 30 30 0 Example 10 10/5 40 0.90 / 2.0 30 30 0 Example 11 10/5 40 0.85 / 10 30 30 0 Example 12 10/20 40 0.90 / 10 30 30 0 Example 13 10/20 40 0.85 / 20 30 30 0 Example 14 10/20 20 0.90 / 20 30 50 0 Example 15 10/20 20 0.85 / 30 30 50 0 Example 16 10/20 60 0.90 / 30 30 10 0 Example 17 10/20 60 0.88 / 10 30 10 0 Example 18 10/20 40 0.88 / 20 30 30 0 Example 19 10/20 40 0.88 / 30 30 30 0

Note 1) Commercially available floor coverings of PVC in the form of cerium.

    2) Commercial plywood floor.

As can be seen from Table 1, when comparing the amount of formaldehyde dissipation of Examples 1 to 19 and Comparative Examples 1 and 2, it can be seen that in the Example no formaldehyde was released. Zero formaldehyde dissipation is equivalent to five claws (less than 0.03 mg / m ² h) under the Ministry of Environment's green building materials quality certification.

As can be seen above, the flooring according to the present invention is an environmentally friendly flooring material that does not emit harmful volatile organic compounds such as formaldehyde, and is non-endocrine-causing agent by using a non-halogen-based resin composition, which is harmless to the human body. The resin composition for flooring according to the present invention does not contain a plasticizer and a chlorine element, and thus, unlike the conventional PVC system, it has an effect of not generating hydrogen chloride gas and dioxins during combustion.

Claims (4)

    A flooring material having a laminated structure consisting of a three-layer structure of an upper layer, an intermediate layer, and a lower layer, wherein the upper layer and the lower layer are made of a resin composition composed of a polypropylene copolymer and a polyolefin elastomer, and the middle layer is made of a polyester fiber. . The method of claim 1, wherein the polypropylene copolymer has an ethylene content of 0.5 to 30% by weight, a melt flow index of 0.3 to 30g / 10 minutes, the polyolefin elastomer has a density of 0.85 ~ 0.90g / cm 3 and a melt flow index Flooring, characterized in that 0.1 to 30g / 10 minutes.  The flooring material according to claim 1, wherein the polyester fiber has an average particle diameter of 5 to 15 µm. According to claim 1, wherein the polypropylene copolymer based on the total weight of the flooring 20 to 70% by weight, the polyolefin elastomer is 1 to 50% by weight, characterized in that the polyester fiber is contained in 10 to 50% by weight Flooring.