KR20090060688A - Loop non-woven fabric for coupling and manufacturing method thereof - Google Patents

Abstract

Loop non-woven for bonding and a manufacturing method thereof are provided to offer beautiful appearance and to bond mechanical bonding force while producing a loop fixing materials with inexpensive cost. Loop non-woven for bonding comprises the surface having an outer shape of a equilateral polygon type, a fiber remaining region and a filmed region forming the non-woven. The filmed region occupies 10 ~ 30% or less of the whole fiber region. The number of protrusions combined on one equilateral polygon is 40 - 60. The fiber is made of polyolefin-based materials. The fiber is comprised of long fiber only or a part of staple fiber and the long fiber.

Description

Loop non-woven fabric and method for manufacturing same

The present invention relates to a loop nonwoven fabric used as a binder of disposable products, including infant diapers and adult diapers, and to a method of manufacturing the same. More specifically, it is equivalent in terms of performance as well as economical manufacturing cost so that it can be easily applied to disposable products. The present invention relates to a coupling loop nonwoven fabric having improved horizontal detachment force (share strength) and vertical detachment force (peel strength) and a method of manufacturing the same.

In general, as a binder of disposable products, including infant diapers and adult diapers, not only easy removal but also easy manufacturing and inexpensive loop nonwoven fabrics have been used.

This loop nonwoven fabric is capable of forming a mechanical bond through entanglement with the projections of the binding grinding material as shown in FIG. The projections of the grinding wheel are arched, mushroom shaped, and hooked, so that they can be easily fitted with the loop nonwoven fabric. The mechanical adhesion serves to prevent the individual components from being easily separated. The shear strength parallel to the surface to which the coupling spring and loop are coupled and the shear strength perpendicular to the connected plane are required to have a force sufficient to maintain the bond during normal use.

On the other hand, the nonwoven fabric of the loop system is mainly used as an adhesive device for disposable products such as personal hygiene materials, clothing, bags, sporting goods, protective clothing, adult and infant wear. In particular, the looper system used as a disposable product such as pins, buttons, buckles, safety pins, and zippers is used for the purpose of being used and discarded in a relatively short period of time due to the nature of the application, thereby reducing the overall material cost and minimizing the manufacturing cost in terms of product design. It has become a key technology. In addition, in terms of performance, it is required to be easy to separate the adhesive, repeatable use, stable adhesion performance and excellent peeling (peeling). However, loops that have been manufactured in a conventional manner have a lot of fluffs when used several times, and have a disadvantage that they do not have stable adhesive strength when repeated several times. In addition, when the cotton fastener roof material is used in combination with the fabric, the soft texture may be inferior and the rough surface may cause damage to the skin when used as a material in contact with the skin. There is a disadvantage that the gap between the liver and the breathability is lowered and can cause other disorders.

Thus, for example, US Pat. No. 4,761,318 is a loop nonwoven fabric proposed to solve the above problem. The invention discloses a "loop fastener part comprising a flexible plastic sheet-like fiber structure" under the name "loop fastener part having a thermoplastic resin attachment and anchoring layer". However, the loop disclosed in this invention still does not completely solve the above-mentioned conventional problem.

As such, there is a need for a loop system that can improve various functions such as softness and breathability as well as low cost for the loop fixing rock material and strengthening of the mechanical binding system in the disposable hygiene product or the disposable protection product. .

Accordingly, the present inventors have completed the present invention as a result of intensive studies to solve the problems of the conventional loop nonwoven fabric described above to provide a loop having better performance and appearance.

It is an object of the present invention to provide a loop nonwoven fabric for joining, which can solve the problems of the conventional loop nonwoven fabric as described above, while producing a loop fixing rock material at low cost, while enhancing mechanical binding force and improving various functions such as softness and breathability. .

Another object of the present invention is to provide a loop nonwoven fabric for bonding having the above characteristics and beautiful appearance.

The above object of the present invention is to provide the bonding properties of a loop nonwoven fabric that can be mechanically attached to the bonding material through proper matching of two or more distinct areas of the nonwoven fabric, i.e., the filmed area due to thermal fusion and the fibrous preservation area. Provided and completed. In detail, by providing arbitrary heat to the nonwoven fabric during the manufacturing process of the nonwoven fabric, film formation is performed due to heat fusion in some areas, and preservation of the fiber shape as laminated by minimizing heat transfer in some areas. It is most desirable that the number of protrusions of the loop bonding ram in the oxidized area should comprise 30 to 100 in one polygon of the fiber retention zone, and that it can include protrusions in the range of 50 ± 10 and good mechanical adhesion of the loop nonwoven. The present invention was completed by finding that it is preferable to have a polygonal specification for expression and beautiful appearance.

Bonding loop nonwoven fabric of the present invention for achieving the above object;

Consists of a surface with an equilateral polygon,

The fibers forming the nonwoven fabric consist of a fiber preservation zone and a filmed zone,

The filmed area is characterized by occupying 10% or more and 30% or less of the total fiber area.

According to another configuration of the present invention, the number of protrusions of the binding grinding material that can be combined in one regular polygon in the fiber storage region is characterized in that 40 to 60.

According to another configuration of the invention, the fiber is characterized in that it is produced including a polyolefin-based raw material.

According to another configuration of the present invention, the fiber is characterized in that it is composed of only long fibers or long fibers including some short fibers in the long fibers.

According to another configuration of the present invention, the nonwoven fabric has a weight of 50 to 100g / ㎡, the height of the loop is 0.5 to 1.5mm, the length of the regular polygon one side 2-5mm, the width of the regular polygon base and the upper portion is 3-7mm It is done.

In addition, the area of the fiber storage region of the loop nonwoven fabric according to the present invention is preferably 20 to 35 mm 2 in order to obtain a desired bonding force.

According to another configuration of the invention, the long fiber is characterized in that the fineness of 15 to 30㎛, the short fiber has a fineness of 1 to 10㎛.

According to another configuration of the present invention, the filmed region is characterized in that formed by performing at a thermal compression temperature 120 to 180 ℃ using a steel roll (STEEL ROLL).

As described above, the present invention is a web having two or more distinct areas, at least one of which is comprised of a loop nonwoven fabric which is an adhesive material for the joining loop fastening system. In order to join two or more web layers, a thermal compression process is performed, and in the region where the loop is formed, the thermal contact is minimized to maintain the fiber circular shape. Bonding between the webs by thermal fusion, the filmed area is limited to a portion of about 10 to 30% of the area on the entire fiber surface to achieve the object of the present invention.

In the present invention, the binding grinding material refers to an object in which the hook shape is dense, and the loop nonwoven fabric forms a binding with the hook of the binding grinding material so that the bonding area is formed so that the storage area of the fiber which is hardly pressed against the heat is uniformly formed. At least part of it.

In addition, the present invention formed the loop surface of the regular polygon shape in consideration of the aesthetic aspect along with the uniformity of the adhesive strength as described above, and to improve the adhesive strength in the area where the angle is formed in each polygon of the fiber retention region The area and flanc angle were adjusted to the optimization level.

The nonwoven fabric of the present invention configured as described above relates to an article selected as a disposable hygiene article, and can be applied to all other industrial fields as well as disposable products for detachable use. In addition, the spacing between the polygons of the fiber preservation area is determined by the basic specifications of the filmed area and the regular polygon, and the base and the upper width of the polygonal pattern form 3 to 7 mm. The surface where the loop is formed through the fiber preservation area has excellent adhesion with the bonding material, and the adhesion performance does not deteriorate even after at least five repetitions.

The present invention configured as described above forms a non-woven roof sheet that forms a loop layer on one side through a spunbond method or a spunbond + meltblown method, and heats the film so that only a proper portion is formed by thermal compression. The space between the spaces formed by the compression is bulky to provide a bulky shape, and the fibers of the non-heat-compressed portion can exert an excellent adhesive force to the adhesive hook protrusion, and thus have good adhesion stability. In addition, it is possible to provide a loop nonwoven fabric that does not lose a great amount of adhesion even after repeated adhesives. Therefore, the nonwoven fabric of the present invention can be used as a cheap and easy fixing material that can have a stable binding force such as disposable personal care products, disposable protective products, and other personal goods. In addition, the nonwoven fabric of the present invention has the surface of the regular polygon as described above in a unique design to form a beautiful surface form compared to the existing to enhance the user's favorability.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the scope of the present invention is not limited to these Examples.

The terms mentioned in the above description and the following examples are used as follows:

As used herein, the term 'filament' refers to a continuous filament (long fiber), unless otherwise specified.

As used herein, the term "short fiber" refers to a staple filament made using an air blowing method.

As used herein, the term 'nonwoven web' means randomly intersecting fibers, but actually means flat paper having a fibrous structure that is distinguished from a method such as knit fabric. It refers to the nonwoven fabric which can be manufactured by meltblown, spunbond method, etc. collectively.

As used herein, the term 'fiber preservation area' means that the heat applied to the bonding and compression of the nonwoven web is not transferred to the front surface of the web but only a portion thereof, and the remaining portion is not completely thermally compressed. As such, the non-thermally compressed region is referred to as a 'fiber preservation region' and, conversely, the thermally compressed region is referred to as a 'film formation region'.

As used herein, the term "bonding grinding material" is a material that can be mechanically bonded to the fiber preservation area of the web, and is classified according to the shape of the head. In this case, the head is referred to as a "protrusion."

As used herein, 'pitch' refers to the spacing between nonwoven web surface fringes (polygons), that is, the spacing between the center and the center of the polygon.

As used herein, the term 'pattern angle' refers to a smaller value among angles formed by the intersection of the cutting line '1' and the cutting line '7' shown in FIG. 2, and refers to the 'flanc angle'. The term 'refers to an angle formed by a connection side from an upper surface of a regular polygon that forms an unbonded region to a lower region that forms a bonding region and a vertical cut surface of the nonwoven web.

As used herein, 'MD direction' refers to the machine direction (machine direction) means the direction of the machine, 'CD direction' refers to the cross-machine direction (cross-machine direction) It means the moving direction and orthogonal direction of the machine.

As used herein, the term "pilling property" refers to a state in which the degree of lint of the nonwoven fabric generated after repeated bonding separation is visually divided.

As used herein, 'horizontal desorption force' refers to the strength of separation by applying a tension force when decoupling and then combining the loop nonwoven fabric and the coupling grinding material, and 'vertical desorption force' is applied to the vertical force Indicates strength at separation.

Example 1

The nonwoven web according to the present invention consists of fibers oriented randomly in the MD and CD directions. These constituent fibers may be long fibers or short fibers as shown in the detailed description of the present invention and shown in FIGS. 5 and 6, and may be made of a combination of long fibers and short fibers. Generally it is 15-30 micrometers for long fibers, and 1-10 micrometers for short fibers.

In this embodiment, to form a single spunbond filament, and to take advantage of the appearance and to express the adhesiveness at the same time to include a regular polygonal loop, by applying appropriate heat to the filmed area and the fiber storage area The non-woven fabric was formed through a thermocompression process so that it can be configured as. In the thermocompression process, the ratio of the filmed region was made to be about 16%, in order to make the number of the number of the projections for the binding protrusions that can be attached to one of the regular polygons of the fiber preservation region in the range of 50 ± 10. Then, the physical properties of the product were measured by the method described below, and are shown in Table 1 below.

As described above, the loop is composed of one or more fibers. Since the loop of the nonwoven fabric manufactured according to the present embodiment has a regular polygonal shape, the loop has one side length, a loop width, and a loop height. As shown in FIG. 2, one side of the loop represents the shortest distance moving from one corner to another corner, and the loop width has a short width connecting the opposite sides and a long width connecting the opposite edges. The loop height is determined by the length of the inclined surface constituting the loop with the plan angle as shown in FIG. 3, and is generally made of 0.5 to 1.5 mm. Most preferably, it does not deviate from the range of 0.8-1.3 mm.

The characteristics of the looped fibrous web can be measured by any suitable magnification facility or SEM (scanning electron microscope) capable of capturing images for measuring features in a magnification range of 50 to 100 times. As an example, the VHX-100 is a digital microscope with an image analyzer. By enlarging and observing the fibrous web in one longitudinal direction on the same line as the longitudinal axis, a loop image for measurement can be obtained. In the same way, the average loop edge length, average loop height, average loop base and top width can also be measured.

On the other hand, the nonwoven web can be manufactured to have a weight in a variety of ranges depending on the application. For example, when used as a moisture absorbing cloth may exceed 200g / ㎡, when used as a wipe may be made about 70g / ㎡, when used as a sanitary goods 60g / ㎡ on average 15 to 85g / It can also be applied to up to m 2. In addition, the loop nonwoven fabric can also be utilized for the seat cover of various filters and various devices such as air filter, bag filter, liquid filter, vacuum filter, drain filter, bacteria shielding filter, and any product as in the present invention. It is composed of a fiber preservation area to be attached to the can be used as a partner of the binding grinding material.

Example 2

Using a nonwoven fabric composed of a composite of spunbond long fibers and melt blown short fibers, the thermal bonding process was performed in the same manner as in Example 1. Thereafter, the physical properties of the product were measured in the same manner as in the above method, and the results are shown in Table 1.

Comparative Example 1

Similarly to Example 1, using a nonwoven fabric composed of a single spunbond filament, a thermocompression-bonding process was carried out so as to be composed of a filmed region and a fiber storage region by applying appropriate heat. However, unlike Example 1, the ratio of the film formation region in the thermocompression process was made to about 35%, which means that the number of the number of projections for the binding projections that can be attached in one of the regular polygon of the fiber retention region is 25 to 30. Thereafter, the physical properties of the product were measured in the same manner as in the above method, and the results are shown in Table 1.

Comparative Example 2

Similarly to Comparative Example 1, a non-woven fabric composed of a single component of spunbond long fibers was subjected to a thermocompression process so that the film was composed of a filmed region and a fiber storage region by applying appropriate heat. However, unlike Comparative Example 1, the ratio of the film formation region in the thermocompression bonding process was about 10%, which means that the number of the number of the lubricity joining protrusions that can be attached to one of the regular polygons in the fiber preservation region is about 75. Thereafter, the physical properties of the product were measured in the same manner as in the above method, and the results are shown in Table 1.

Comparative Example 3

Similarly to Example 2, a non-woven fabric composed of a spunbond long fiber and a meltblown short fiber was used to perform a thermocompression bonding process to be composed of a filmed area and a fiber storage area by applying appropriate heat. However, unlike Example 2, the ratio of the film-forming region in the thermocompression process was about 35%, which means that the number of the number of the number of projections projections for binding that can be attached in one of the regular polygons of the fiber retention region. Thereafter, the physical properties of the product were measured in the same manner as in the above method, and the results are shown in Table 1.

Comparative Example 4

Similarly to Comparative Example 3, using a nonwoven fabric composed of a composite of spunbond long fibers and meltblown short fibers, a thermocompression-bonding process was performed to be composed of a filmed region and a fiber storage region by applying appropriate heat. However, unlike Comparative Example 3, the ratio of the film formation area in the thermocompression process was about 10%, which means that the number of the number of lubricity binding protrusions that can be attached to the regular polygon of one of the fiber retention areas is about 75. Thereafter, the physical properties of the product were measured in the same manner as in the above method, and the results are shown in Table 1.

[Measurement method of physical property]

1) loop nonwoven strength and elongation

A sample of 5 cm in the MD direction and 10 cm in the CD direction was cut from the roof material nonwoven fabric and the strength and elongation were measured in the MD direction using an instron machine. The same specimen was changed only in the direction, and the strength and elongation in the CD direction were measured by n = 5 by the same method.

2) Peel force (share-peel strength)

The same strength and elongation test pieces were cut out and measured using an instron machine. Detachment force (peel strength) was measured by applying a force in the orthogonal direction between the loop and hook, and the detachment force (share strength) was measured by applying a linear force to the loop and the hook. Proceed to n = 5.

3) fiber denier

The thickness of the fiber was measured on a 50 to 150 times magnification screen using a microscope. (n = 10)

4) Peelability

The surface of the loop nonwoven fabric of the test piece after peeling measurement was observed by visual field, and it divided into 4 steps and 12 steps by comparison with the initial storage state. In five repetitions, the unbonded surface state of the loop was observed and classified in the same manner as described above.

1 is a plan view schematically showing the surface pattern of a loop nonwoven fabric according to the present invention;

2 is a standard plan view of a loop nonwoven fabric according to the present invention;

3 is a side structural view of a loop nonwoven fabric according to the present invention;

4 is a cross-sectional SEM photograph of a loop nonwoven fabric according to the present invention. FIG. 4a is a loop nonwoven fabric composed of long fibers, and FIG. 4b is a loop nonwoven fabric composed of a composite of long fibers and short fibers.

5 is a planar SEM photograph of the loop nonwoven fabric according to the present invention;

6 is a plan view and a side view of a coupling grinding material typically combined with a loop nonwoven fabric,

7 is a brief explanatory diagram of a detachment force measuring method.

* Explanation of symbols for main parts of the drawings

3 --- base width of fiber preservation area

4 --- width of filmed area

7 --- diagonal width of fiber preservation area

8 --- Inclined interface between the filmed area and the fiber preservation area

9 --- inside of fiber preservation area

10 --- distance between fiber preservation zones

11 --- upper width of the fiber preservation zone

13 --- length of one side of the fiber preservation zone

21 --- upper width of the fiber preservation zone

24 --- height of fiber preservation area

25 --- width of filmed area

32 --- slope angle

Claims (7)

Consists of a surface with an equilateral polygon, The fibers forming the nonwoven fabric consist of a fiber preservation zone and a filmed zone, And wherein the filmed area comprises at least 10% and less than 30% of the total fiber area. The binding loop nonwoven fabric according to claim 1, wherein the number of protrusions of the binding fine material that can be bonded in one regular polygon in the fiber retention region is 40 to 60. The binding loop nonwoven fabric of claim 1, wherein the fiber is made of a polyolefin-based raw material. The binding loop nonwoven fabric of claim 1, wherein the fibers are composed of only long fibers or long fibers including some short fibers in the long fibers. The nonwoven fabric of claim 1, wherein the nonwoven fabric has a weight of 50 to 100 g / m 2, a height of a loop of 0.5 to 1.5 mm, a length of a regular polygonal side of 2 to 5 mm, and a width of a regular polygonal base and an upper portion of 3 to 7 mm. Loop nonwoven fabric for bonding. The binding loop nonwoven fabric of claim 1, wherein the long fibers have a fineness of 15 to 30 μm and the short fibers have a fineness of 1 to 10 μm. The bonding loop nonwoven fabric as claimed in claim 1, wherein the filmed area is formed at a thermocompression temperature of 120 to 180 ° C using a steel roll.

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