KR100341278B1 - Flame retardant cloths and its manufacturing method - Google Patents

Abstract

The present invention relates to a flame retardant cloth and a method for manufacturing the same, and provides a flame retardant cloth having a flame retardant and a flame retardance increased by applying a flame retardant composition containing a silicone resin and graphite to a fiber, and a flame retardant cloth. The flame retardant fabric of the present invention is prepared by a method for coating an emulsion obtained by mixing a water-soluble resin, a silicone resin, graphite, a foaming agent, a foam stabilizer, a surfactant, a thickener, and a crosslinking agent with fibers to have effective flame retardancy and heat resistance. . In addition, the flame retardant cloth of the present invention can be utilized for fire protection clothing and fire filter.

Description

Flame retardant cloth and its manufacturing method {Flame retardant cloths and its manufacturing method}

The present invention relates to a flame retardant fabric and a method of manufacturing the same, and more particularly, to a flame retardant fabric and a method for producing a flame retardant composition containing silicone resin graphite to the fiber to increase the flame resistance and flame resistance to the flame.

To date, research on flame and flame has been conducted in various ways, and its use has also been developed in various ways to suppress the development of flames, such as for building materials and fire protection. In particular, flame and flame retardant treatments have been developed to suppress the ignition and combustion of organic materials by treating them on the surface of a material consisting mainly of organic materials.

As a representative example, a method of applying flame retardant composition containing halide to the surface of cloth or resin plate made of organic material to impart flame retardancy and flame resistance to material made of organic material has been applied to various products. (US Patent No. 4532287, US Patent No. 5326800) However, such a method has a problem of generating a large amount of environmental pollutants in the cycle of production, use and disposal due to the use of halides.

In addition, a method of using a metal hydroxide such as aluminum hydroxide has been developed and commercialized to prevent the harmfulness of halides (US Pat. No. 5,500,480). However, the use of such a metal hydroxide exhibits proper flame retardancy only by a large amount of use. There is a disadvantage in reducing the physical properties of the material.

Therefore, there is still a need for a new method for effectively imparting flame retardancy to fabrics such as fabrics and the development of products thereby.

Accordingly, the present invention has been made in view of the necessity of the above-described intra-species technology, and an object of the present invention is to provide a flame retardant cloth having excellent flame retardancy.

It is another object of the present invention to provide a method for producing the anti-flame cloth.

It is another object of the present invention to provide a fire protection article such as a fire protection suit, a fire protection filter, and a fire protection panel using the fire prevention cloth.

In order to achieve the above object, the present invention provides a flame retardant fabric coated with a flame retardant composition comprising a water-soluble resin, a silicone resin, a foaming agent, a foam stabilizer, a surfactant, a thickener, graphite, and a crosslinking agent in a fiber.

In another aspect, the present invention manufactures a flame retardant article prepared with the flame retardant cloth as a main raw material. The flame retardant article is preferably a fireproof garment, a fireproof filter or a flameproof panel.

In another aspect, the present invention is the emulsion solution preparation step of uniformly mixing the water-soluble resin, silicone resin, graphite, foaming agent, foam stabilizer, surfactant, thickener and crosslinking agent; A resin foam preparation step of introducing the emulsion into a bubble generator and blowing the air to generate a resin foam; A resin foam coating step of supplying the resin foam obtained above to a foam coater and coating the fibers to maintain a foam state; And it provides a flame retardant fabric manufacturing method comprising a heat-treatment step of heating and drying the foam-coated fibers to be gradually heated in a temperature range of 90 to 170 ℃. It provides a method for producing a flame retardant fabric further comprising the step of impregnating the fiber into a mixed solution containing a water-soluble resin, a silicone resin, a thickener, and a crosslinking agent before the resin foam coating step.

Hereinafter, the present invention will be described in detail with reference to specific examples.

Fire retardant cloth according to the invention is characterized in that the emulsion is prepared by uniformly mixing the water-soluble resin, silicone resin, graphite, foaming agent, foam stabilizer, surfactant, thickener and crosslinking agent to coat the fiber, and dried.

The fiber is preferably a nonwoven fabric made by intersecting warp and weft at right angles and made of a fabric woven in a plane and not knitted or woven.

The water-soluble resin of the present invention is preferably a synthetic resin having a low degree of polymerization selected from the group consisting of acrylic resins, urethane resins, polytetrafluoro ethylene resins and mixtures thereof as synthetic resins that can be dissolved or dispersed in water. In addition, the emulsion of the present invention preferably contains 10% by weight to 50% by weight of the water-soluble resin, and most preferably 20% by weight to 30% by weight.

In addition, the emulsion liquid of the present invention preferably contains 5% by weight to 30% by weight of the silicone resin, and most preferably 8 to 15% by weight.

In addition, the foaming agent included in the emulsion solution of the present invention helps to form a resin foam during the manufacturing process of the anti-foam in applying the emulsion solution to the fiber with a surfactant, the foaming agent is preferably an alkyl sulfonic acid compound, the surfactant is carbon number Preference is given to 12 or more alkylsulfonic acid sodium subjects. In addition, the emulsion liquid of the present invention preferably contains 0.1 wt% to 1 wt% of a foaming agent, and preferably contains 0.1 wt% to 1 wt% of a surfactant.

In addition, the foam stabilizer contained in the emulsion solution of the present invention acts as a retainer of the resin foam by the foaming agent and the surfactant, the foam stabilizer is preferably ammonium stearate, foam stabilizer 0.1 in the emulsion solution of the present invention It is preferable to include 1% by weight to 1% by weight.

In addition, the thickener included in the emulsion solution of the present invention maintains a state in which the resin foam is attached to the fiber, preferably an acrylic-based thickener. In addition, it is preferable that the thickener is contained in the emulsion solution of the present invention 1% by weight to 5% by weight.

In addition, the graphite constituting the emulsion liquid of the present invention has a high thermal conductivity and excellent heat resistance, thus acting on the formation of a flame retardant layer of the fabric, and graphite can be used in both natural graphite and synthetic graphite, and in the emulsion liquid of the present invention. It is preferable that 5 wt% to 30 wt% of graphite is included.

In addition, the crosslinking agent constituting the emulsion solution of the present invention acts to harden the surface of the foam of the resin foam layer on the fiber to strengthen the mechanical properties of the flame retardant cloth with graphite. As a crosslinking agent, a crosslinking agent containing acrylic monomer is preferable. In the emulsion of the present invention, it is preferable to include 0.1 wt% to 0.5 wt%.

In another aspect, the present invention provides a method for producing an anti-foam cloth by coating the emulsion composition on the fiber.

The manufacturing method of the flame retardant fabric of this invention is as follows, In a manufacturing method of a flame retardant fabric, a fiber is a woven or nonwoven fabric. Fireproof fabric manufacturing method of the present invention can obtain a flame-retardant effect by forming a three-dimensional network layer by the resin foam structure to the foam by curing the resin foam of the emulsion liquid on the foam and then fire-proof clothing, fire-resistant filter, and flame Flame retardant fabric for panels can be produced. When describing the method for producing a flame retardant cloth of the present invention as follows.

[Fireproof Fabric Manufacturing Method]

(1) Emulsion liquid preparation step: uniformly mix the water-soluble resin, silicone resin, graphite, foaming agent, foam stabilizer, surfactant, thickener and crosslinking agent.

(2) Resin foam preparation step: The emulsion is poured into a bubble generator, and the air is blown to generate a resin foam.

(3) Resin foam coating step: The resin foam obtained above is supplied to a foam coater and coated to maintain a foam state on the surface of the fiber.

(4) Heat treatment step: The foam-coated fiber is heated to dry stepwise in the temperature range of 90 to 170 ℃.

The emulsion solution preparation step consists of uniformly mixing the water-soluble resin, silicone resin, foaming agent, foam stabilizer, surfactant, thickener, graphite and crosslinking agent.

In the resin foam preparation step, the obtained emulsion solution is introduced into a bubble generator to generate a resin bubble. The bubble generator blows air into the resin base to form bubbles while the air is discharged through the resin base. It is usual to have. In particular, in the resin foam preparation step, the size and amount of the foam can be adjusted by the supply speed of air applied to the resin base, and in the present invention, the air supply speed in the mixing head from which the air is ejected is in the range of 1 to 3 l / min. Is preferred. When the air supply rate is less than 1 l / min, the size of the bubbles generated is not only very nonuniform, the amount of foam is relatively reduced, there is a problem that the effect of removing the fine dust is reduced, 3 l / min If exceeded, the size of the resulting foam is too large, such that the resin foam layer coated fibers can not be used as a filter when used as a refractory filter.

The resin foam coating step comprises the step of supplying the resin foam obtained in the resin foam preparation step to a conventional foam coater and coating to maintain a foam state on the surface of the fiber, wherein the resulting foam foam is maintained as it is It is applied to the surface of the fiber as it is so that the resin foam is laminated in a network structure on the fiber surface. The foam coater used in this step allows the resin foam to be laminated with a thickness of 0.1 to 0.3 mm on the surface of the nonwoven fabric.

The heat treatment step is dried by heating the foam-coated fibers in a stepped temperature rise in a temperature range of 90 to 170 ℃. Through the heat treatment step, the resin foam forming the resin foam layer is dried, cured, and hardened as it is, thereby forming a resin foam layer having a plurality of uniform pores.

In addition, it is preferable that the method for manufacturing the anti-foam fabric further includes a fiber impregnation step before the method for producing the anti-foam fabric. Including the fiber impregnation step can further increase the flame retardancy and durability of the flame retardant cloth. In the fiber impregnation step, the fiber is impregnated and processed in a mixed solution containing a water-soluble resin, a silicone resin, a thickener, and a crosslinking agent, followed by heating and drying at 140 to 170 ° C. for 20 minutes.

Hereinafter, preferred examples are provided to aid in understanding the present invention. However, the following examples are provided only to more easily understand the present invention, and the present invention is not limited to the following examples.

Example 1

Liquid silicone resin 10 g, acrylic resin 60 g, graphite 20 g, alkyl sulfone oxide 0.5 g, ammonium stearate 0.3 g, sodium alkyl sulfonate 0.5 g, as a thickener Viscalex-30 1 g, acrylic crosslinking agent 0.3 The emulsion was prepared by dispersing g rapidly for 20 minutes. While maintaining the foam stability by controlling the emulsion at a mixing speed of 300 to 500 rpm, a blow rate of 2: 1 to 5: 1 while supplying quantitatively air at the rate of 2 l / min in the bubble generator A fine resin foam was generated. The resin foam is supplied to the foam coater, and the resin foam is passed between the screws for controlling the application speed of the foam so that the rotational speed of the screw is adjusted to 20 to 100 rpm while the injection nozzle for spraying the resin foam is 1 mm thick. Injecting a resin foam on the surface of the woven fabric being transported at a speed of 4.5 to 15 m / min in close proximity to the 300 to 600 g / m ² surface of the woven fabric so that the surface of the woven fabric is coated with a thickness of 0.1 to 0.3 mm Coated. The woven fabric coated with the resin foam was put into a preheated drying furnace, and heated to 170 ° C. to slowly increase the temperature at 120 ° C. to dry the resin foam. The flame retardant cloth was well formed with a flame retardant layer made of a resin foam layer, and the flame retardance was measured by measuring the time until the ignition in a state spaced at a distance of 10 mm from the flame at 1,200 ° C. As a result of the measurement, it was confirmed that the flame retardant of Example 1 did not ignite for 1 minute.

Example 2

The same manufacturing method as in Example 1 was carried out, and a nonwoven fabric was used instead of the woven fabric of Example 1. The obtained flame retardant of Example 2 showed the pores of the nonwoven fabric and the pores of the resin foam layer as it was, showing a suitable state for use as a filter, and when ignited in a state spaced at a distance of 10 mm from the flame of 1,200 ℃ Flame resistance was measured by measuring the time until. As a result of the measurement, it was confirmed that the anti-flame cloth according to the present invention did not ignite for 3 minutes.

Example 3 Preparation of Flame Retardant Cloth Impregnated

20 g of a liquid silicone resin, 70 g of acrylic resin, 1 g of Viscalex, and 0.5 g of an acrylic crosslinking agent were mixed to impregnate the nonwoven fabric and then dried at 140 to 170 ° C. Subsequent processes were carried out in the same manner as in Example 1, but the woven fabric used in Example 1 used a nonwoven fabric dried after impregnation. The flame retardant fabric prepared in Example 3 did not ignite for 3 minutes in terms of measuring the flame retardant effect through flame spinning, compared to the flame retardant fabric prepared in Example 2, showing an equivalent level of flame retardant effect, and mechanical friction Experimental results in terms of durability was found to be superior to the flame retardant of Example 2 above.

Therefore, as described above, the anti-foaming cloth of the present invention has an increase in flame resistance and heat resistance by the action of graphite and silicone resin of a flame retardant composition, and is suitable for use for fire protection clothing, fire protection panels and fire protection filters. In addition, it is possible to provide an appropriate anti-foaming cloth according to the type of fiber or the application of the anti-foaming cloth in the method for producing an anti-flame cloth of the present invention.

Claims (9)

A flame retardant fabric in which a fiber is treated with a flame retardant composition comprising a water-soluble resin, a silicone resin, graphite, a foaming agent, a foam stabilizer, a surfactant, a thickener, and a crosslinking agent. The anti-foaming cloth according to claim 1, wherein the water-soluble resin is selected from the group consisting of acrylic resins, urethane resins, polytetrafluoro ethylene resins, and mixtures thereof. The fire retardant fabric according to claim 1, wherein the flame retardant composition comprises 5 wt% to 30 wt% of silicone resin and 5 wt% to 30 wt% of graphite. Flame-retardant article prepared from the flame retardant cloth of claim 1 as a main raw material. The flame retardant article according to claim 4, wherein the flame retardant article is selected from the group consisting of fire suits, fire filters and fire panels. (a) preparing an emulsion solution for uniformly mixing a water-soluble resin, a silicone resin, graphite, a foaming agent, a foam stabilizer, a surfactant, and a crosslinking agent; (b) a step of preparing a resin foam in which the emulsion is poured into a bubble generator and blows air to generate a resin foam; (c) a resin foam coating step of supplying the resin foam obtained above to a foam coater, and coating the fibers to maintain a foam state; And (d) a method for producing a flame retardant fabric, characterized in that it comprises a heat treatment step of drying by heating the foam-coated fibers in a temperature range of 90 to 170 ℃ step by step. The method of claim 6, further comprising the step of impregnating the fibers into a mixed solution containing a water-soluble resin, a silicone resin, a thickener, and a crosslinking agent before the resin foam coating step, and then drying the fibers. 8. The method of manufacturing a flame retardant fabric according to claim 6 or 7, wherein the air supply speed is set within the range of 1 to 3 l / min in the resin foam preparation step to supply air to the resin base. The method of claim 6 or 7, wherein in the coating step, the emulsion solution is coated so as to be laminated on the fiber to a thickness of 0.1 to 0.3 mm.