KR100829087B1 - Spunbond nonwoven fabric for dryer sheet and producing method thereof - Google Patents

Abstract

The present invention relates to a spunbond long-fiber nonwoven fabric for a clothes dryer and a method for manufacturing the same. More specifically, the single yarn denier is 4 to 10 denier by a mixed spinning method of a composite material. The present invention provides a method for producing a spunbond long fiber nonwoven fabric for a clothes dryer having excellent physical properties and no deterioration in the flexibility of fabric softeners such as workability and drug dropping property.

Dryer sheet, flexible capacity, long fiber nonwoven fabric

Description

SPONBOND NONWOVEN FABRIC FOR DRYER SHEET AND PRODUCING METHOD THEREOF}

Figure 1a is a process schematic diagram of the hot air bonding method of the heat bonding method of the present invention,

Figure 1b is a process schematic diagram of the thermal roll bonding method of the thermal bonding method of the present invention,

Figure 1c is a process schematic diagram of the calender roll thermal bonding method of the thermal bonding method of the present invention,

1D is a process schematic diagram of a heat bonding method in which the hot air bonding method and the calender heat bonding method are combined, which is the heat bonding method of the present invention.

Figure 2a is a cross-sectional structure of the composite spun fiber of the present invention produced by the sheath / core method of the present invention,

Figure 2b is a cross-sectional structure of the composite spun fiber of the present invention produced by the side by side method of the present invention.

Figure 3 is a coarse distribution (coarse) distribution structure of the long fiber nonwoven fabric produced by the manufacturing method of the present invention.

Figure 4 is a dense distribution structure of the long fiber nonwoven fabric produced by the comparative method of the present invention.

The present invention relates to a spunbond long-fiber nonwoven fabric for a clothes dryer sheet and a method of manufacturing the same, which is simple and economical in manufacturing and does not lower the flexibility of the fabric softener.

In general, the softening method of the clothing is a liquid or powdered fiber softener in the last rinse of the garment washing process, or the fabric softener formulated as a non-woven fabric or sheet in the clothes dryer to add a softening effect. How to get.

In particular, low temperature washing and natural drying method is mainly made of a liquid softener in the rinsing step.

However, liquid fiber softener has the advantage of excellent flexibility and good smell, but it is inconvenient to put it in the last rinsing, and when used simultaneously with detergents, the softness due to the interaction with the surfactant cleaning power and softening effect There is a problem that all are significantly reduced.

Such prior arts include U.S. Patent Nos. 4,062,647 and 4,472,287, which are packaged in a non-woven fabric with detergent and a flexible component that does not dissolve at low temperatures. A technique is described in which a water-insoluble cationic surfactant or an amphoteric surfactant, which is a flexible component, is dissolved and adsorbed onto a garment to extract a softening effect.

In addition, US Pat. No. 5,6665,300 describes a method for producing a long fiber nonwoven fabric used in a clothes dryer as a method of manufacturing a filament through a roller and then forming the filament on a net.

When the long fiber nonwoven fabric is manufactured in the above manner, the manufacturing process is complicated and a lot of manufacturing costs are generated, and there is a concern that the flexibility of the fabric softener such as workability and drug dropping property may be reduced.

In order to solve the problems of the prior art as described above, the object of the present invention is to take advantage of the properties of the composite spinning method is excellent in physical properties and performance, such as elongation, tear strength, folding properties, thickness, etc., manufacturing process is simplified and cost It is to provide a long-fiber non-woven fabric and a method for manufacturing the same, which is economical by reducing the cost, and can prevent the degradation of the flexibility of the fabric softener, such as workability and drug release properties in the manufacture of the dryer sheet.

Still another object of the present invention is to provide a sheet for a clothes dryer manufactured using the long fiber nonwoven fabric.

In order to achieve the above object, the present invention melts and spun one or more composite radioactive materials selected from the group consisting of polyester, low melting point polyester, polypropylene and polyethylene to form a filament bundle, the net to move the filament bundle It provides a method for producing a spunbond long-fiber non-woven fabric for clothes dryer, characterized in that the step of opening and heat-sealing the above.

In addition, the present invention is a spunbond filament for clothes dryer which satisfies the properties of elongation of 30% or more, tear strength of 1.2 kgf or more, chemical impregnation of 40g or more, and chemical release of 40% or more. Provide nonwovens.

In addition, the present invention provides a sheet for a clothes dryer manufactured using the long fiber nonwoven fabric.

Hereinafter, the present invention will be described in detail.

The present invention is excellent in heat resistance and high temperature form stability without lowering the flexibility of the fabric softener, mechanical strength and elongation is high, the manufacturing method of the long-fiber nonwoven fabric for clothes dryers that can increase the chemical processing speed of the clothes dryer It is about.

The present invention is characterized in using a composite spinning method for spinning by using a composite material rather than a normal normal spinning method in manufacturing a nonwoven fabric. In addition, the present invention uses a combination of an optimal method for making the filament density low density and controlling the single yarn denier in a certain range, and the composite materials are best welded at the time of heat welding.

Therefore, the method of the present invention is excellent in elongation and tear strength, and is excellent in folding property (box folding property or box storage property), and compared with nonwoven products manufactured using the conventional regular spinning method and manufactured using Homo PET material. It is possible to obtain the effect of securing the superiority of the side surface, and to reduce the cost by simplifying the complicated manufacturing process used in the past, and the flexibility of the fabric softener such as workability and drug dropping ability to process dry sheet dough The fall can be prevented.

The manufacturing method of such a long fiber nonwoven fabric of this invention is demonstrated concretely.                     

According to the method for producing a long fiber nonwoven fabric of the present invention, the filament bundle passing through the extruder is spinning / cooling and stretching the filament bundle in a state in which the opening device of the filament bundle is placed in the direction of the net conveyor through the detention, It passes through a cooling zone for cooling the filament bundle of high heat radiated and discharged out of the cage, and below the cooling zone, the focusing device ejector and the carding machine are located at the same time in the vertical direction. It is integrated on a moving net conveyor to form a nonwoven web (WEB), and a long fiber nonwoven fabric having excellent physical properties may be manufactured by heat fusion and bonding.

As the composite spinning material used in the present invention, general polyester, low melting polyester, polypropylene, polyethylene, or the like may be used.

In addition, the spinning method using the composite spinning material is a) sheath / core (sheath / core) method of the circular fiber cross-section; b) It can be selected from the side by side method of circular fiber cross section. This will be described in more detail.

a) Sheath / Core radiation method

The composite spinning material is a method of spinning with a general polyester as a core and a low melting point polyester or polypropylene or polyethylene as a sheath. The composite ratio of the sheath and the core is preferably 5: 5 to 1: 9, and more preferably 3: 7 or 2: 8. When the ratio of the sheath in the complex ratio exceeds 5, radioactive instability and filament breakage may occur frequently, which may act as an operation anxiety factor.                     

b) Side by Side radiation

The composite spinning material is a method in which a general polyester is used as one side and a low melting polyester or polypropylene or polyethylene is used as the other side. The compound ratio of the side by side is preferably 5: 5 to 1: 9, and more preferably 3: 7 or 2: 8. When the ratio of one side exceeds 5 in the compound ratio, it may act as a radiological instability factor such as radioactive instability and truncation, and may cause disadvantages in that heat fusion is poor due to distortion of the form of side cross-sections.

In addition, in the present invention, the coarse distribution map uses 4-10 denier single yarn denier, and the number of spinnerets is selected in consideration of the discharge amount and the spinning speed. Apply to be 4 denier. Therefore, the chemically impregnated property of the dry sheet fabric softening agent is excellent, so that the dry sheet contains enough fiber softening agent for the consumer to use in the dryer, so that the fiber softness performance is not degraded. If the single yarn denier is less than 4 denier, the distribution is too dense so that the fabric softener does not penetrate properly between the filaments of the nonwoven fabric and thus cannot contain the fabric softener. If the denier is more than 10 denier, the denier is too thick, causing manufacturing difficulties. .

In addition, it is preferable that the method of heat fusion used in the present invention is selected from one or more kinds from the group consisting of the following methods:

i) Hot air bonding method: Hot air though (circulating hot air)

The method has a circular hole of a certain size on the surface of the cylindrical calender roll without a piece pattern, the suction is sucked into the air from the outer surface of the cylindrical calender roll to the inside through the circular perforation when manufacturing the nonwoven fabric (Suction) It is a method of heat-sealing nonwoven web by using Hot Air Though Suction Drum, which is a high temperature heat treatment device having) structure alone.

Ii) Fragment roll thermal bonding method: the primary main bonding process using the upper embossing roll and the lower calender roll, the secondary auxiliary bonding process is a method of heat fusion using the upper and lower embossed engraving rolls;

Iii) calender roll thermal bonding method: a method in which the primary main bonding process uses calender rolls rather than fragment rolls at both the upper and lower ends so that the bonding pressure is weakened so that the thickness remains alive;

I) Composite thermal bonding method: A thermal bonding method combining a hot air bonding method and a calender roll thermal bonding method, wherein the primary main bonding process uses the method of i), and the secondary auxiliary bonding process uses the method of i). Using heat fusion method.

As described above, the spunbonded nonwoven fabric produced by the method of the present invention exhibits excellent physical properties of at least 30% elongation, at least 1.2 kgf of tear strength, at least 40 g of chemical impregnation, and at least 40% of chemical release. It is effective to apply to clothes dryer by preventing deterioration of flexibility.

The following presents a preferred embodiment to aid the understanding of the present invention. However, the following examples are provided only to make the present invention easier, and are not limited to the embodiments of the present invention.

Example 1

Composite polyester material composed of general polyester with low intrinsic viscosity (IV) of 0.650 and melting temperature of 254 ℃ and low melting point polyester is used as core of general polyester with melting temperature of 225 ℃ and intrinsic viscosity (IV) of 0.70 The composite spinning method using the phosphorus low melting point polyester as the sheath was applied. The composite ratio of the sheath and the core was 5: 5, and the melt was extruded at a spinning temperature of 286 ° C. and extruded so that the denier of the filament was 4 denier through the spinneret having 24 capillary numbers. Thereafter, the extruded filament bundles were cooled and solidified by cooling air under normal conditions in a cooling chamber, which were drawn through a conventional high pressure air ejector and passed through a carding machine. Subsequently, the spunbond nonwoven fabric was manufactured by colliding with a collision plate of a predetermined angle installed directly below the carding machine so that the filament bundles spread on the collision plate were softly distributed on the net conveyor.

In the heat-sealing method, a circular hole of a certain size is formed on the surface of a cylindrical calender roll without a pattern, and air is sucked inward from the outer surface of the cylindrical calender roll through a circular hole when manufacturing nonwoven fabrics. A long-fiber nonwoven fabric was manufactured by a method of hot fusion of a nonwoven web using a hot air thought suction drum, which is a high temperature heat treatment apparatus having a suction structure. The final weight of the prepared long fiber nonwoven fabric was 18gsm.

Comparative Example 1

Manufactured under the same conditions and methods as in Example 1, spinning was performed using a general-purpose polyester material having a typical melting temperature of 254 ° C. and an intrinsic viscosity (IV) of 0.650 as the spinning material. The weight of the prepared sheet was 18gsm as in Example.

Physical properties of Example 1 and Comparative Example 1 were measured by a conventional method, and the results are shown in Table 1 below.

Properties of Spunbonded Nonwovens division unit Example 1 Comparative Example 1 Remarks After mm 0.14 0.08 Poor packing after low  Properties Tensile strength (MD / CD) kgf / 5cm 12.3 / 5.0 11.7 / 5.3 Elongation (MD / CD) % 41/36 21/22 Chemical impregnation (impregnation amount) gram 45 22 Indirect check of coarse distribution Tear strength kgf 1.5 0.5 Grab mehtod C lecture cm 6.1 8.5 Folding evaluation

Note) If the coarse distribution is good, the chemical impregnation is excellent.

As shown in the results of Table 1, in the case of Example 1 of the present invention, it can be seen that the physical properties are superior to Comparative Example 1, in particular, the elongation and tear strength is excellent, and also excellent in terms of folding after folding.

As described above, the method of the present invention is simple and economical to reduce the cost, and does not reduce the flexibility of the fabric softener such as workability and drug dropping properties, excellent in high temperature form stability, excellent strength and elongation, In addition, it is possible to provide a long-fiber nonwoven fabric for clothes dryer having excellent bonding force between filaments.

Claims (6)

Melting the composite spun material consisting of polyester and low melting point polyester, spinning by sheath / core method to form a filament bundle, and opening the filament bundle on the moving net and heat-sealing , In the sheath / core method, the composite ratio of the sheath and the core is 5: 5, The core used in the sheath / core method is a polyester having an intrinsic viscosity (IV) of 0.650 and a melting temperature of 254 ° C., and the sheath is a low melting polyester having an intrinsic viscosity (IV) of 0.70 and a melting temperature of 225 ° C., The method of manufacturing the spunbond long-fiber nonwoven fabric for clothes dryer, characterized in that the heat fusion is made using a hot air method for circulating and adhering hot air. delete The method of manufacturing a long fiber nonwoven fabric according to claim 1, wherein the single yarn denier of the filament is made of 4 to 10 denier. The method of claim 1, wherein the method of thermal fusion further comprises a method selected from the group consisting of the following methods: i) the primary main bonding process using the upper embossing roll and the lower calender roll, the secondary auxiliary bonding process using the upper and lower embossed engraving rolls; ii) a method in which the primary main bonding process uses calender rolls rather than fragment rolls at both the upper and lower ends so that the binding pressure is weakened so that the thickness remains intact; And iii) The primary main bonding process uses the hot air method and the secondary auxiliary bonding process uses the method of ii). A spunbond long fiber nonwoven fabric for a clothes dryer manufactured by the method of any one of claims 1, 3, and 4, which satisfies the properties of elongation of 30% or more, tear strength of 1.2 kgf or more and thickness of 0.14 mm. A sheet for a clothes dryer manufactured using the long fiber nonwoven fabric of claim 5.

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