JPH03199458A - Production of nylon nonwoven fabric having excellent needling adaptability and fiber raw material thereof - Google Patents

Abstract

PURPOSE:To obtain fiber raw material for nonwoven fabric, having excellent needling adaptability without causing broken needle in making webs using nylon yarn into multiple layer and needling by attaching a specific amount based on ground fabric of the nonwoven fabric of mineral oil to nylon yarn during spinning. CONSTITUTION:0.5-0.7% based on ground fabric for producing nonwoven fabric of a finishing oil consisting essentially of a mineral oil is attached to nylon yarn during spinning to form webs, which are piled in multiple layer and needled. By providing the yarn with the finishing oil, raw material yarn for nylon fiber nonwoven fabric, having excellent needling adaptability and a few broken needles, is obtained in order to make the fiber raw material for nonwoven fabric have a coefficient of dynamic friction of a few broken needles.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides nonwoven fiber raw materials with fibers/aM with less needle breakage.
The present invention relates to a method for producing a nylon nonwoven fabric with excellent inter-dynamic friction coefficient and reduced needle breakage during needling and excellent needling suitability, and a fiber raw material thereof.

(Prior Art and Problems) Nonwoven fabrics are manufactured by adhering webs as aggregates of fibers or by intertwining them with needles.

When fabric is made from this web using an adhesive, it is not always good to have fibers that are compatible with the adhesive, but if excess adhesion is absorbed, the fabric becomes bulky and expensive.

On the other hand, in the method of piercing with a needle (needling), factors such as the slipperiness of the fibers, so-called surface friction, and fiber length are involved.

When creating a high-density nonwoven fabric by this latter needling, the following problems arise when soft nylon fibers are used as the raw material for the nonwoven fabric.

Nylon fibers do not have good setting properties, so it is difficult to crimp and fix them. Therefore, nylon fibers have poor crimp retention and the web is easily deformed due to tension during processing.

In particular, when thick nonwoven fabrics are manufactured by needling using nylon fiber raw materials, the tip of the needle bends due to the resistance of the fibers, and the tip of the needle comes off the punch hole of the bed plate of the needling punch machine and connects directly to the bed. There was a problem with bending.

That is, when a plurality of needles are inserted into the surface of the laminated web and the upper and lower laminated webs are entwined and integrated, the penetration of the needles causes the nylon fibers to converge and be pulled in the direction of the needle holes. . At this time, the nylon fiber is wound W3#
, since the holding property is weak and the crimp is weak, the web moves freely due to the low frictional resistance of the fibers, causing a misalignment in the area 7 to be needled, and the needle does not descend vertically, but instead moves along the gap between the fibers. It turns and descends.

As a result, the tip of the needle bends due to the resistance of the fibers, comes off the hole in the bed, and comes into direct contact with the bed, causing needle breakage.

When needle breakage occurs, the broken needle must be removed and the needle replaced, increasing extra work.Continuing needling with a bent or broken needle may damage the surface of the nonwoven fabric and damage the product. There was a decline in quality.

In particular, when making a high-density nonwoven fabric by laminating multiple layers of webs and increasing the thickness, the number of laminated webs increases, and the penetration path when a needle enters becomes misaligned, and the needle is not straight, causing bending and broken needles. It's coming.

Therefore, it was not possible to produce a homogeneous thick nonwoven fabric using nylon fiber raw materials.

The present invention was made in view of the drawbacks of the prior art described above, and even if nylon fibers with weak crimp retention properties are used as nonwoven fiber materials, the coefficient of dynamic friction between the fibers/wA fibers of the fibers can be improved to reduce needle breakage. The purpose of the present invention is to provide a method for producing a nylon nonwoven fabric with excellent needling suitability, which significantly reduces needle breakage during needling, and a fiber raw material thereof.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the method for producing a nylon nonwoven fabric with excellent needling suitability according to the present invention includes a method for producing a nonwoven fabric by needling a web using nylon yarn. 0.5 to 0.7% of the oil per base fabric of the nonwoven fabric to be created
After adhesion, a web is made from this raw material, and the web is laminated into multiple layers and needled.

Further, the fiber raw material has a structure in which 0.5 to 0.7% of an oil agent containing mineral oil as a main component is applied to the base fabric during spinning of the nylon yarn.

(Example) The present invention will be explained in detail below.

In order to improve the dimensional stability of webs using nylon fibers, the present invention eliminates the use of an oil agent mainly composed of mineral oil, which is used as a sizing agent during spinning of the nylon fibers, as a pretreatment during nonwoven fabric production. .5 to 0.7%/base fabric attached.

As a result, in the experimental results described below, the coefficient of dynamic friction between fibers and fibers is reduced with less needle breakage. Therefore, the carded web was created using the random wafer method to create a web in which the fibers had no directionality, and then multi-layered. Even if a high-density nonwoven fabric is created by laminating and needling, the penetration resistance of needles is reduced and needle breakage is significantly reduced.

However, if the amount of the oil adhered is less than 0.5%/base fabric, U
C11800 is low, the web is deformed and needle breakage is likely to occur.

On the other hand, if the amount of the oil applied is more than 0.7%/base fabric, the coefficient of dynamic friction will increase and needle breakage will increase, and the surface of the fiber material will become sticky, and when it is applied to the card, , a problem arises in that the clothing of the card gets stuck, making it impossible to print the card.

The composition of the above-mentioned oil agent is preferably as follows.

Mineral oil 40-50% FOE alkyl ether 10-12% POE alkyl ester 40-50% Next, examples thereof will be described.

90% nylon fiber 1.5 d x 47 m/m,
Polyester fiber 1.5 a x 38 B/m 10
% blend, and after opening, 5% of the oil agent used as a sizing agent during spinning of the nylon raw fiber is sprayed on the fiber using a spray method, the composition of which is 45% mineral oil, 11% POE alkyl ether, and 44% FOE alkyl ester. After changing the concentration of the spray liquid as shown in Table 1 and changing the amount of oil adhering to the W4 fibers as shown in Table 1, carding was performed to create a web using the random Univer method. f41
0 Of! /m2, 8 sheets are stacked, and needling is performed on the first
The number of punches is 20P/a with a needle method of 10 mm from above.
Needling is performed at m2, and the second part is needled from the top and bottom with a needle method of 5 mm and the number of punches is 350 P/am2, and the third part is needled from the top and bottom with a needle method of 10 mm and the number of punches is 550 P/cm. needling and date 80
Table 1 shows the number of broken needles and card winding problems when needling 200 m of high-density nonwoven fabric with a density of 0.2011/m2 and a density of 0.2011/am'.
At the time of m creation, the amount of adhesion was 05 and 07%/Kiichi was the target net profit Ud1800 value, and the needle breakage was 3 to 5, 1/1 of the conventional value.
decreased to 0. Attached Rffl is 04%/Ud 1 for base fabric
800 is low, the needle breakage is on the same level, and the effect is insufficient.
When the adhesion amount was 08%/Kiichi, Ud1800 increased, so the number of needle breakage increased due to the increase in frictional force, and due to stickiness, there were many cases of winding up with cards.

Table 1 When spraying 5% base fabric using the spray method A: B: 16
Coefficient of dynamic friction at a running speed of 1.800 cm/min between fibers and fibers in the der method < JIS L-1074゜6.1
2> However, the measurement method is based on JIS standards, but the measurement conditions are based on JIS standards.
Conducted under conditions more severe than the standard.

CXD: When producing 200 m of base fabric in Example, card curling did not occur even in case (2) where an anti-static oil agent was applied to the raw cotton received.

(Effects of the Invention) As described above, the present invention provides an oil agent containing mineral oil as a main component during spinning of the nylon yarn, in which a web using nylon yarn is multi-layered and then needled to produce fusenfu. 0.5 to 0.0 per base fabric of the nonwoven fabric used to produce After adding γ%,
A web is made from this raw material, and the web is laminated in multiple layers and needled, resulting in fibers with less needle breakage.
The coefficient of kinetic friction between the ia fibers significantly reduces needle breakage,
The work of removing broken needles and the associated work of changing the needles of the needling machine has been drastically reduced.

Furthermore, due to the reduction in needle breakage, damage to the surface of the nonwoven fabric due to residual needles from broken needles was reduced, making it possible to produce a homogeneous nonwoven fabric without any damage.

Claims (2)

[Claims] (1) When producing a nonwoven fabric by needling a web using nylon yarn, 0.5 to 0.7% of the oil agent is applied to the base fabric of the nonwoven fabric to be created, and then a web is made using this as a raw material. A method for producing a nylon nonwoven fabric with excellent needling suitability, in which the web is laminated in multiple layers and then needled. (2) A fiber raw material for a nylon nonwoven fabric with excellent needling suitability, which is obtained by adhering 0.5 to 0.7% of an oil agent containing mineral oil as a main component to the base fabric during spinning of the nylon yarn.