Fibrous nonwoven fabric
a non-woven fabric and fiber technology, applied in the direction of weaving, filament/thread forming, melt spinning methods, etc., can solve the problems of defective nonwoven fabric quality and inability to achieve stable spinnability, and achieve the effect of reducing the diameter of fibers and preserving spinning stability
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example 1
Preparation of Resin Composition
[0067]To a resin mixture composed of 10 parts by mass of a low-crystalline polypropylene (“L-MODU (a registered trademark) S901”, manufactured by Idemitsu Kosan Co., Ltd., MFR: 50 g / 10 min, melting point: 70° C.) and 90 parts by mass of a high-crystalline polypropylene A (“NOVATEC SA-03”, manufactured by Japan Polypropylene Corporation, MFR: 30 g / 10 min, melting point: 160° C.), erucic acid amide was added in an amount of 2,000 ppm on the basis of the resin mixture, thereby preparing a resin composition.
[0068]Physical properties of the low-crystalline polypropylene and the high-crystalline polypropylene A as described above were measured by the following measuring methods. Results are shown in Table 1.
[Initial Elastic Modulus]
[0069]The polypropylene was subjected to press molding to fabricate a test piece, the initial elastic modulus of which was then measured by a tensile test in conformity with JIS K-7113.[0070]Thickness of test piece (No. 2 dumbbel...
example 2
[0111]A nonwoven fabric was molded and evaluated in the same manners as those in Example 1, except that in Example 1, the discharge amount per hole was changed to 0.2 g / min, the ejector pressure was changed to 4.0 kg / cm2, and the line speed was changed to 24 m / min. Results are shown in Table 2. At that time, [T] / [E] obtained from a relation between the discharge amount per hole and the ejector pressure was 0.05.
example 3
[0112]A nonwoven fabric was molded and evaluated in the same manners as those in Example 1, except that in Example 1, the discharge amount per hole was changed to 0.3 g / min, the ejector pressure was changed to 2.0 kg / cm2, and the line speed was changed to 35 m / min. Results are shown in Table 2. At that time, [T] / [E] obtained from a relation between the discharge amount per hole and the ejector pressure was 0.15.
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