KR101733929B1 - Slip-typed Polyurethane Foam and Seat-Cover using the same - Google Patents

Abstract

The present invention relates to a slip-type polyurethane foam having autonomous slipping properties (skid surface properties), and to a seat cover material using the slip-type polyurethane foam. Even when a backing cloth or an olefin film is not attached to the surface of the polyurethane foam, the polyurethane foam is smoothly pushed on a sewing plate when sewing is performed to produce a seat, and is smoothly fitted when a completed sheet is covered over an object such as a vehicle chair or the like. The slip-type polyurethane foam is polyurethane foam obtained by mixing a polyether-based polyol, a diisocyanate compound, a catalytic agent, and a foaming agent. The polyester-based polyol includes 0-30 parts by weight of NPP having a number average molecular weight of 2,000-4,000, and 70-100 parts by weight of POP having a number average molecular weight of 3,000-5,000. The polyurethane foam may have physical properties in which a hardness (I.L.D. 25%) is 15 kgf/314 cm^2 or higher and a pore size is 40-70 PPI.

Description

[0001] The present invention relates to a slip-type polyurethane foam and a seat cover material using the slip-typed polyurethane foam and a seat-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyurethane foam and a sheet cover material, and more particularly, to a polyurethane foam sheet and a sheet cover material which are used for sewing a sewing machine for sheet production without attaching a backing cloth or an olefin film to the surface of a polyurethane foam Slip type polyurethane foam having a self-slip property (surface slippery property) so as to be well pushed and to be easily inserted when a finished sheet is covered with a target such as a car chair or the like, and a seat cover material using the slip type polyurethane foam.

Generally, a car seat has a structure in which a polyurethane liquid resin is foamed and crosslinked to form a cushioning material, and a cover made by sewing leather, fabric or synthetic leather on the surface thereof is turned over. Japanese Patent Application Laid-Open No. 7-330843 and Japanese Patent Application Laid-Open No. 5-320304 disclose polyurethane foams suitable for automobile seats.

Polyurethane foam is a material which is quite advantageous as a material for automobile seat, such as lightweight, heat-resistant and flame-retardant, but its surface is rough and exposed, and when used, the surface is not so good, and discoloration occurs upon receiving sunlight, There is a possibility that the surface of the chair is broken due to the decomposition, and since the polyurethane foam is an open cell and the cell structure penetrates to the inside, there is a possibility that the bacterial penetration may lead to the warming of various bacteria, It is not slippery, and when sewing, it does not push well on the sewing machine and it does not enter well when it is covered with a car chair or the like.

Accordingly, a backing cloth or an olefin film is attached to the surface of a polyurethane foam as a material capable of compensating for the disadvantages of the polyurethane foam as described above to form a car seat (or a sheet cover) Thereby making it possible to push the finished sheet easily on the sewing machine when sewing the sheet for production of the sheet, and to enter the finished sheet when the sheet is covered with a target such as a car chair.

However, since the backing cloth and the olefin film described above are relatively expensive products, they have problems in cost increase due to their use.

Japanese Patent Application Laid-Open No. 7-330843 Japanese Unexamined Patent Application Publication No. 5-320304

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a backing cloth or an olefin film which can be attached to a surface of a polyurethane foam, A slip type polyurethane foam having self-slip property (surface slippery property) that allows the finished sheet to enter well when covering a target such as a car chair, and a sheet cover material using the slip type polyurethane foam.

To attain the above object, a slip type polyurethane foam according to one aspect of the present invention is a polyurethane foam obtained by mixing a polyether polyol, a diisocyanate compound, a catalyst, and a foaming agent, wherein the polyether polyol has a number average 0 to 30 parts by weight of NPP (Natural Polypropylene) having a molecular weight of 2,000 to 4,000 and 70 to 100 parts by weight of POP having a number average molecular weight of 3,000 to 5,000, wherein the polyurethane foam has a hardness (ILD 25 %) Of 6 to 30 kgf / 314 cm ² and a pore size of 40 to 70 PPI, and the polyurethane foam may further comprise at least one of a foam stabilizer, a flame retardant, and a black pigment.

According to another aspect of the present invention, there is provided a seat cover material using a slip-type polyurethane foam, wherein a leather layer is laminated on one side of a polyurethane elastic foam base layer, and the other side of the polyurethane elastic foam base layer Wherein the slip type polyurethane foam comprises 0 to 30 parts by weight of NPP (Natural Polypropylene) having a number average molecular weight of 2,000 to 4,000 and 70 to 100 parts by weight of a number average molecular weight of 3,000 to 5,000, (ILD 25%) of 6 to 30 kgf / 314 cm ² and a pore size of 40 to 70 cm < ² > PPI, and the polyurethane elastic foam is a sponge having a relatively lower hardness than the slip type polyurethane foam.

According to another aspect of the present invention, there is provided a seat cover material using a slip-type polyurethane foam, the seat cover material comprising a polyurethane foam base layer and a leather layer laminated on one side of the polyurethane foam base layer, 0 to 30 parts by weight of NPP (Natural Polypropylene) having a number average molecular weight of 2,000 to 4,000 and 70 to 100 parts by weight of POP (Polymer of Polyol) having a number average molecular weight of 3,000 to 5,000, (ILD 25%) of 6 to 30 kgf / 314 cm ² and a pore size of 40 to 70 PPI.

The polyurethane foam may contain 30 to 60 parts by weight of a diisocyanate compound, 0.1 to 5 parts by weight of a catalyst, and 2 to 20 parts by weight of a blowing agent based on 100 parts by weight of the polyether polyol, A reaction catalyst, and the blowing agent may include water and methylene chloride (MC).

As described above, according to various aspects of the present invention, when sewing for producing a sheet, the surface is slippery to such a degree that it can be pressed well on a sewing plate, such as a conventional backing cloth and an olefin film, The nature of the sponge can provide a slip-type polyurethane foam that is largely retained.

Also, it is possible to provide a slip-type polyurethane foam which is relatively inexpensive in comparison with the existing backing cloth or olefin film and can replace the functionality of the backing cloth or the olefin film and the functionality of the conventional sponge at the time of sheet production.

Therefore, it is possible to replace the expensive backing cloth and the olefin film and / or the slip type polyurethane foam which is relatively inexpensive instead of the existing sponge in the production of the sheet, So that the finished sheet can be easily inserted when the object is covered with a car chair or the like and the cost of the product can be significantly reduced as compared with an existing sheet using an expensive backing cloth or an olefin film It is effective.

1 is a configuration diagram of a seat cover according to an embodiment of the present invention;
2 is a configuration diagram of a seat cover material according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

First, a slip-type polyurethane foam according to an embodiment of the present invention will be described.

The slip-type polyurethane foam according to an embodiment of the present invention is obtained by mixing a polyether-based polyol, a diisocyanate compound, a catalyst, and a foaming agent.

Specifically, the slip-type polyurethane foam according to this embodiment is prepared by adding a reaction catalyst, a foaming agent, etc. as an additive to a polyether-based polyol and a diisocyanate as main raw materials, followed by condensation polymerization, foaming, and curing for a certain period of time.

In this embodiment, the slip-type polyurethane foam is formed by a condensation polymerization reaction of a polyether-series polyol and a diisocyanate. Particularly, the polyether-series polyol comprises 0 to 30 parts by weight of a natural polypropylene (NPP) having a number average molecular weight of 2,000 to 4,000, (ILD 25%) of from 6 to 30 kgf / 314 cm ² and a pore size of from 40 to 70 by using a mixed polyol containing 70 to 100 parts by weight of POP having a number average molecular weight of 3,000 to 5,000 PPI, and when it has such physical properties, the surface of the sponge is slippery to such a degree that it can be pushed well on a sewing plate such as a backing cloth and an olefin film, A slip-type polyurethane foam can be obtained.

I.L.D. 25% (Load Defection 25%) refers to the weight required to contain 25% of the polyurethane foam, which is the minimum weight that 25% of the 314 cm area polyurethane foam can sink. I.L.D. The larger the value of 25%, the harder the polyurethane foam is, while the slippery property is better. The smaller the value of 25%, the more flexible it is, but the slip property can be lowered.

More specifically, the slip-type polyurethane foam according to an embodiment of the present invention includes 30 to 60 parts by weight of a diisocyanate compound, 0.1 to 5 parts by weight of a catalyst, and 2 to 20 parts by weight of a blowing agent, based on 100 parts by weight of the polyether- The catalyst may include a urethane reaction catalyst (e.g., SnOct) that reacts with the polyol and TDI, and a urea reaction catalyst (e.g., TEDA-33LV) that is used to react the TDI with water. The blowing agent may include water and methylene chloride Ride (MC).

The reaction catalyst (that is, the catalyst) added in the condensation reaction described above in the present embodiment is a component that activates the condensation reaction and the cross-linking reaction, and includes, for example, bis (dimethylaminoethyl) ether, triethylenediamine, N , N'-dimethylethanolamine, stannous octate, dibutyltin dilaurate, dioctyltin dilaurate, and the like can be used.

In this embodiment, water may be used alone as the foaming agent, but methylene chloride (MC), pentane, dichlorofluoromethane, trichlorofluoromethane, etc. may be used alone or in combination as an auxiliary foaming agent to enhance the foaming effect.

Further, in the slip type polyurethane foam according to this embodiment, additives such as defoamer (or foam stabilizer), flame retardant and the like can be further used, and a black pigment (P.B) in black pigment.

As the antifoaming agent, a compound having a polyether side chain bonded to the polysiloxane main chain may be used. Specific examples thereof include B-8301, B-8228 and BF-2470 from Evonik of Germany or L-580K from Momentive of USA.

As the flame retardant, compounds such as phosphates, phosphonates, phosphites, phosphinates, phosphine oxides containing halogens and phosphorus can be used.

Slip according to an embodiment of the present invention as described above, the polyurethane foam has an apparent density of 14 ~ 28kg / m ^3, hardness (25%) 6 ~ 30kgf / 314cm 2, tensile strength of 0.5 ~ 2.5kgf / cm ^2, elongation of 40 , Which is comparatively low in price compared to backing cloth or olefin film by having physical properties of ~ 110%, tear strength of 0.2 ~ 1.6kgf / cm, elasticity of 10 ~ 30%, combustible SE grade and odor grade of 1 ~ 3 The functionality of the backing cloth or olefin film and the functionality of existing sponges can all be substituted in sheet production.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. It should be understood, however, that the scope of the present invention is not to be interpreted as being limited by the following examples, but is capable of modifications within the scope of the present invention.

[Example]

A slip type polyurethane foam was prepared using the composition components shown in Table 1 below.

The raw materials used for preparing the slip-type polyurethane foam in Production Examples 1 to 4 of Table 1 are as follows.

1) Polyether polyol: NPP (Natural Polypropylene), number average molecular weight 3,000 OH value 50 to 60 mgKOH / g

2) Polyether polyol: POP (Polymer of Polyol), number average molecular weight 4,610 OH value 26-30 mgKOH / g

3) T-80: diisocyanate in which 2,4-TDI (toluene diisocyanate) and 2,6-TDI are present in an 80:20 molar ratio, equivalent weight 87.5

4) Polysiloxane: Polyalkyleneoxydimethylsiloxane copolymer

5) Sn.oct: Stannus octoate (organotin)

6) TEDA-33LV: Tetraelene diamine catalyst

7) Phosphate: Chlorine-containing aliphatic phosphate

8) MC: methylene chloride

9) PB: Polyol black pigment

[Property evaluation]

(SEM analysis), rebound resilience (JIS K6401), apparent density (JIS K 7222) and hardness (ILD 25%, JIS K 64002 (D)) were measured for the slip type polyurethane foam prepared according to Table 1 Table 1 summarizes the results.

As shown in Table 1, the slip-type polyurethane foam prepared according to the embodiment of the present invention has ILD 25% hardness within the range of 6 to 30 kgf / 314 cm ² at a low density, and has a constant size pore and tensile strength within 40 to 70 ppi Which has a relatively high durability and slip as compared with conventional polyurethane foam.

On the contrary, Comparative Preparation Examples 1 and 2 polyurethane foam pore size, the impact resilience, the density, but the property of the hardness meets the requirements of traditional sponge, 6 ~ 30 kgf / 314cm that is required by the present invention of ² Of the polyurethane foam of the present invention does not satisfy the physical properties of the ILD 25% hardness and the pore size of 40 to 70 ppi or less and thus the polyurethane foam of Production Examples 1 to 4 has a problem that the required performance for slip property is remarkably lowered .

Next, the sheet cover material using the slip-type polyurethane foam will be described.

The sheet cover material according to one embodiment of the present invention is a sheet cover material using the slip type polyurethane foam as described above. As shown in FIG. 1, the sheet cover material includes a polyurethane elastic foam base layer 10, (20) and the above-mentioned slip-like polyurethane foam (30) can be produced by laminating each other.

The seat cover material according to another embodiment of the present invention is a seat cover material using the slip-type polyurethane foam described above. As shown in FIG. 2, the slip-type polyurethane foam 30 described above is attached to one side of the leather layer 20, ≪ / RTI > may be prepared by laminating.

In the embodiment of Figures 1-2, a substrate layer 10, a leather layer 20, a substrate layer 10 and a slip-on polyurethane foam 30. Alternatively, the leather layer 20 and the slip-type polyurethane foam 30 may be joined together by various bonding methods. Examples of the bonding method include a flame lamination method, a hot-melt lamination method, a web film bonding lamination method, (IR) heater indirect thermal lamination method.

The flame lamination method is a method in which a surface of a polyurethane foam is melted by heating using a direct heating means such as a flame, and the back surface (unused surface) of the leather layer is attached to the liquid adhesive solution produced by the heating, So that the polyurethane foam is bonded to the leather layer.

In the hot-melt lamination method, a hot-melt adhesive is coated on a polyurethane foam, dried, and then pressed in a heating furnace while covering the leather layer.

The web film bonding lamination method is a method of laminating a leather layer and a polyurethane foam by melting a web film while covering the leather layer with a web film laminated on a polyurethane foam and passing through a heating furnace.

In addition, an infrared (IR) heater indirect thermal lamination method is a method in which one surface of a polyurethane foam is heated and melted by using indirect heating means such as an infrared (IR) heater, and a liquid adhesive, (Unused surface) of the polyurethane foam is attached to the surface of the leather layer.

The sheet cover material obtained by the above-described joining method preferably has an adhesive strength of 1.0 to 1.5 kgf / cm. When the adhesive layer is included in the above adhesive strength range, the leather layer and the polyurethane foam may be integrated, so that they are not peeled off even in long-term use.

Also, in this embodiment, when the leather layer (leather) used for the seat cover material is used as leather formed with perforations, air permeability (air permeability) can reach 200 to 2,000 cm / sec. Filter foam manufacturing process) is not required, so that the process can be simplified and the cost can be reduced.

According to this embodiment, the seat cover material including the leather layer (leather) and the slip-type polyurethane foam can be variously utilized in leather products requiring elastic restoration, and is mainly used for automobile seat, head rest, bed mattress, sofa, bed quilting A pillow, a hot water mat or an elastic cushion, or may be used for a leather for a bag, a handbag, a shoe, a garment, etc. .

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Polyurethane elastic foam base layer
20: leather layer
30: Slip type polyurethane foam

Claims (18)

100 parts by weight of POP (Polymer of Polyol) having a number average molecular weight of 3,000 to 5,000 as a polyether polyol, 50.1 parts by weight of a diisocyanate compound, 1 part by weight of a foaming agent, 0.22 parts by weight of a urethane reaction catalyst, 4 parts by weight of a water foaming agent, 0.2 By weight of a urea reaction catalyst, 14 parts by weight of a flame retardant, 5 parts by weight of a methylene chloride (MC) blowing agent, and 4 parts by weight of a black pigment,
Wherein the polyurethane foam has a hardness (ILD 25%) of 30 kgf / 314 cm ² and a pore size of 60 PPI. delete delete delete delete A sheet cover material comprising a polyurethane elastic foam substrate layer laminated on one side thereof with a leather layer and a slip polyurethane foam laminated on the other side of the polyurethane elastic foam substrate layer,
The slip type polyurethane foam is a polyether polyol having 100 parts by weight of POP (Polymer of Polyol) having a number average molecular weight of 3,000 to 5,000, 50.1 parts by weight of a diisocyanate compound, 1 part by weight of a foaming agent, 0.22 parts by weight of a urethane reaction catalyst, (ILD 25%) of 30 kgf / 314 cm < ² > (30% by weight of water), 0.2 part by weight of a urea reaction catalyst, 14 parts by weight of a flame retardant, 5 parts by weight of methylene chloride And a pore size of 60 PPI,
Wherein the polyurethane elastic foam is a sponge having a relatively lower hardness than the slip type polyurethane foam. delete delete delete delete The method according to claim 6,
The polyurethane elastic foam base layer and the slip polyurethane foam are laminated by at least one of a flame lamination method, a hot-melt lamination method, a web film bonding lamination method, and an infrared (IR) heater indirect thermal lamination method Sheet cover material using a slip-type polyurethane foam. The method according to claim 6,
Wherein the polyurethane elastic foam base layer and the leather layer are laminated by at least one of a flame lamination method, a hot-melt lamination method, a web film bonding lamination method, and an infrared (IR) heater indirect thermal lamination method. Sheet cover material using polyurethane foam. A sheet cover material comprising a polyurethane foam base layer and a leather layer laminated on one side thereof,
The polyurethane foam base layer is composed of 100 parts by weight of POP (Polymer of Polyol) having a number average molecular weight of 3,000 to 5,000 as a polyether polyol, 50.1 parts by weight of a diisocyanate compound, 1 part by weight of a foaming agent, 0.22 parts by weight of a urethane reaction catalyst, 4 parts by weight of a water foaming agent, 0.2 parts by weight of a urea reaction catalyst, 14 parts by weight of a flame retardant, 5 parts by weight of a methylene chloride (MC) blowing agent and 4 parts by weight of a black pigment, and having a hardness (ILD 25%) of 30 kgf / ² and a pore size of 60 PPI. The sheet cover material is made of a slip-type polyurethane foam. delete delete delete delete 14. The method of claim 13,
Wherein the polyurethane foam base layer and the leather layer are laminated by at least one of a flame lamination method, a hot-melt lamination method, a web film bonding lamination method, and an infrared (IR) heater indirect thermal lamination method. Seat cover material using urethane foam.

Images