JPH05339877A - Friction-resistant woven and knitted fabric and method for producing the same - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a woven and knitted fabric excellent in performance of preventing perforation of clothing caused by friction with the floor during exercise, and a method for producing the same. [Structure] A core / sheath composite spun fiber composed of a polymer having a melting temperature of the polymer constituting the core portion lower than that of the polymer constituting the sheath portion by 40 ° C. or more is at least 30% or more of the outer surface of the woven or knitted fabric. And a friction-melting resistant woven fabric comprising 0.1% by weight or more (relative to the fiber) of a smoothing agent composed of at least one of paraffin-based, silicon-based, alkyl amide-based, and polyolefin-based on all fiber surfaces. knitting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a woven and knitted fabric excellent in the ability to prevent perforation of clothing mainly caused by friction with the floor during exercise (hereinafter, simply referred to as friction and fusion resistance) and a method for producing the same. ..

[0002]

2. Description of the Related Art It is well known that sports clothing using thermoplastic fibers is apt to cause a perforation phenomenon due to friction with the floor that occurs during exercise. This perforation phenomenon is mainly due to the fact that the heat generated by friction melts the fibers constituting the garment or causes thermal embrittlement. In order to solve such a problem, many proposals have been made so far for obtaining a woven or knitted fabric having excellent friction melting resistance.

For example, a method of coating the fiber surface with a silicone elastomer having high heat resistance and smoothness in a woven or knitting finishing step (Japanese Patent Laid-Open No. 63-243379),
A method in which rayon, which is a non-friction-melting fiber, is mixed in a specific ratio (Japanese Utility Model Laid-Open No. 60-140789), and a method in which heat-resistant fibers are mixed under a specific knit structure (Japanese Utility Model Laid-Open No. 62-1228).
No. 79). Furthermore, JP-A-4-11006
Japanese Patent Laid-Open No. 4-65537, Japanese Patent Laid-Open No. 4-65
In Japanese Patent Laid-Open No. 542, Japanese Patent Application Laid-Open No. 4-82932, and Japanese Patent Application Laid-Open No. 4-82933, fibers in which a polymer having a melting point lower than that of a sheath is arranged in a core and a composite yarn thereof are proposed.

[0004]

However, the method of treating the surface of a woven or knitted fabric with a chemical as disclosed in JP-A-63-243379 has a problem in durability because the adhesive force is restricted in relation to the texture. However, mixing rayon as disclosed in Japanese Utility Model Application Laid-Open No. 60-140789 has a problem in maintaining dyeing fastness, and mixing heat-resistant fibers as disclosed in Japanese Utility Model Application Laid-Open No. 62-122879 gives a three-layer knit structure. Therefore, there is a problem that the cost increases. Further, JP-A-4-11006, JP-A-4-65537, and JP-A-4-6554.
No. 2, JP-A-4-82932, and JP-A-4-82932.
Polyester fiber disclosed in Japanese Patent No. 82933;
And the composite yarn thereof is excellent in cost and durability. However, for sports-use woven and knitted fabrics, which are strongly required to have friction and melting resistance, it has been desired to develop a woven and knitted fabric made of fibers having more excellent friction and melting resistance.

The object of the present invention is to solve the above-mentioned problems, and further, to provide a woven and knitted fabric which is excellent in texture and dyeability as a garment and which can be produced at a low cost, and which has excellent resistance to friction and melting. To provide a manufacturing method.

[0006]

SUMMARY OF THE INVENTION The gist of the present invention is to provide a core / sheath composite spun fiber composed of a polymer having a melting temperature of the polymer constituting the core portion lower than that of the polymer constituting the sheath portion by 40 ° C. or more. Constitutes at least 30% or more of the outer surface of the woven or knitted material, and 0.1% by weight of a smoothing agent comprising at least one of paraffin type, silicon type, alkyl amide type and polyolefin type on the entire fiber surface.
(Fiber to Fiber) A woven or knitted fabric having a friction-melting resistance, which comprises the above.

Here, the core / sheath composite spun fiber is obtained by a melt spinning method, and as shown in FIG.
One in which the polymer component forming the core 1 is completely covered with the polymer component forming the sheath 2 (A), or one in which a part of the core shown in FIG. 2 exists on the fiber surface (B) means. Moreover, the cross-sectional shapes of the core and the sheath are not particularly limited.

[0008] One of the requirements for achieving the present invention is Japanese Patent Laid-Open No.
To select the combination of melting temperatures of the polymers that make up the core and sheath of the composite spun fiber as disclosed by JP-11006. That is, it is necessary that the melting temperature of the polymer forming the core portion is at least 40 ° C., preferably 80 ° C. lower than the melting temperature of the polymer forming the sheath portion. The polymer melting temperature is an endothermic peak measured by a differential scanning calorimeter, and in the present invention, it is D manufactured by Perkin Elmor.
It was measured using SC2 type.

Although the mechanism by which the woven or knitted fabric of the present invention is excellent in anti-friction melting performance is not clear, the frictional heat generated between the floor and the sheath which is the high melting temperature polymer is considered as the heat of fusion of the low melting temperature polymer. It is presumed that this is due to a synergistic effect of preventing melting and thermal embrittlement of the sheath as a result of instantaneous absorption and a decrease in the friction coefficient due to the smoothing agent present on the fiber surface. On the contrary, when the difference in melting temperature between the polymers constituting the core / sheath portion is less than 40 ° C., it is presumed that the frictional heat of the sheath portion cannot be absorbed as the heat of fusion of the core portion and the fiber is broken.

Therefore, theoretically, the higher the melting temperature of the polymer constituting the sheath is, the more preferable, and the higher the melting temperature of the polymer constituting the sheath is, the more excellent the friction melting performance is. However, industrially, during composite spinning, the temperature inside the nozzle pack is the same, so the larger the melting temperature difference between the core / sheath polymer, the lower the melting point temperature polymer is thermally decomposed in the nozzle pack, but the spinnability decreases. core/
The limit of the melting temperature difference of the sheath polymer changes intricately depending on the discharge amount of the polymer forming the core, the residence time of the polymer in the spinning machine, and the like, and therefore it must be appropriately determined by experiments.

Further, the proper ratio (volume ratio) of the polymer constituting the core / sheath portion is mainly determined by the difference in the melting temperature of the used polymers, the fineness of the single fibers, etc., and cannot be uniquely determined. Generally, core volume: sheath volume = 1:
If it is 1 to 1: 5, a sufficient effect can be obtained.

In the woven / knitted fabric, the core / sheath composite spun fiber must be present on the outer surface in an amount of 30% or more. The core / sheath composite spun fiber in the outer surface of the woven or knitted fabric as referred to herein constitutes 30% or more of the outer surface woven or knitted structure shown in FIG. % Or more. That is, FIG. 3 shows that the core / sheath composite spun fiber has 12 structures and the total number of structures is 16
It shows that it is 2/16 × 100 = 75%.

If the amount of the core / sheath composite spun fiber on the outer surface is less than 30%, the heat generated by friction exceeds the amount of heat absorbed by the heat of fusion of the core of the core / sheath composite spun fiber. It is presumed that the remaining heat causes fiber breakage or melting of the sheath portion of the core / sheath composite spun fiber and the portion of the woven / knit fabric other than the core / sheath composite spun fiber.

However, even if the core / sheath composite spun fiber is present in an amount of 30% or more of the outer surface of the woven or knitted fabric, the friction and melting resistance is not sufficient, and the friction and melting resistance is more excellent than the object of the present invention. The object of the present invention can be achieved by a synergistic effect with the effect of the core / sheath composite fiber, which is not a fiber, that is, a smoothing agent is present on the fiber surface of the woven or knitted fabric to lower the friction coefficient.

The smoothing agent present on the fiber surface is not particularly limited, and is usually used as a softening agent for the purpose of reducing the friction coefficient between fibers. Examples thereof include, but are not limited to, paraffin wax, an aqueous emulsion of a silicon compound, an aqueous emulsion of an alkyl amide compound, and an aqueous emulsion of a polyolefin compound.

The amount of the above-mentioned leveling agent attached is required to be 0.1% by weight (vs. fiber) or more, and preferably 0.5% by weight (vs. fiber) or more. If the adhered amount is less than 0.1% by weight (with respect to the fiber), the friction between the fibers becomes large, and the heat of the fusion heat of the core portion or more is received, and the fibers are broken. As the treatment method, the woven or knitted fabric is padded with a smoothing agent aqueous solution, and then dried and heat-treated. Drying may be performed in a normal process, and is preferably performed at 100 ° C. or higher for 30 seconds or more. Further, the heat treatment is carried out for the purpose of fixing the coating film of the smoothing agent on the fiber surface, and it is usually preferable to perform the treatment at 130 ° C. or higher for 30 seconds or longer. If the heat treatment at this time is insufficient, the coating film is likely to fall off during washing, resulting in performance deterioration.

Further, a crosslinkable resin may be used in combination for the purpose of improving washing durability. For example, a melamine resin and an isocyanate resin can be mentioned. However, it is not particularly limited as long as the object of the present invention can be achieved. Further, the amount of adhesion is not particularly limited, but if it is 5% by weight (to the fiber) or more, the texture is hardened, which is not preferable.

[0018]

EXAMPLES The present invention will be specifically described below with reference to examples. [Abrasion Resistance Evaluation Method] The abrasion resistance in Examples and Comparative Examples was measured by the method shown in FIG. The knitted fabric 3 is attached to a flat plate of neoprene rubber having a width of 5 cm, a length of 5 cm and a hardness of 80, and a sample attachment arm 5 having a fulcrum 4
Fixed to the surface, and the load 6 is adjusted to the surface of the 80φ cylinder 6 of cherry wood that rotates at 1800 rpm, and the knitted fabric 3 is rubbed if there is a breakage when the knitted fabric is contacted for 3 seconds with a load of 6 kg. The melting performance was judged.

[Example 1] The polymer constituting the core was
Polypropylene having a melting temperature of 171 ° C., polyester having a melting temperature of a polymer constituting the sheath of 255 ° C., the cross-sectional shape of the core is circular, the cross-sectional shape of the sheath is circular, and the volume ratio of the core to the sheath is 1: 3. B99d / 30f drawn yarn of Then, a polyester knitted yarn B150d / 48f made of a single polymer having a polymer melting temperature of 255 ° C. and the core / sheath composite spun fiber were aligned to prepare a tubular knitted fabric. The obtained tubular knitted fabric was smoothed with a smoothing agent (Maycatex HP-600
(Meisei Kagaku) Immerse in an aqueous solution containing 5%, and after pad (P
ick up rate 100%), dried at 130 ° C for 1 minute,
A curing treatment was performed at 150 ° C. for 2 minutes to obtain a sample. When the friction melting resistance of the obtained sample was evaluated, it was good as shown in Table 1. The washing durability was also good.

[Comparative Examples 1 and 2] As a comparative example, the knitted fabric of Example 1 to which no smoothing agent was applied (Comparative Example 1) was a polyester single polymer fiber (B150d / 4).
A knitted fabric made of 8f) was treated with a smoothing agent (Comparative Example 2), and the friction fusion resistance was measured.
As shown in, the abrasion resistance was low and the washing durability was not observed.

[0021]

[Table 1]

[Examples 2, 3 and 4 and Comparative Example 3] The tubular knitted fabric used in Example 1 was prepared under the conditions shown in Table 2 to prepare a knitted fabric in which the amount of the smoothing agent was changed, and the abrasion resistance was obtained. The meltability was evaluated. As a result, as shown in Table 2, the amount of the smoothing agent was 0.
It can be seen that it is necessary to add 1% by weight or more.

[0023]

[Table 2]

Example 5 Nylon 12 having a melting temperature of 175 ° C. was used for the polymer constituting the core portion, polyester having a melting temperature of 255 ° C. for the polymer constituting the sheath portion, core / sheath volume ratio = 1: 1, B100d / 36f which is a composite spun fiber drawn yarn in which both the core / sheath part has a circular cross section and the core part is at the center of the sheath part.
Got Then, a polyester stretched yarn B150d / 48 composed of a single polymer having a polymer melting temperature of 255 ° C.
f and the core / sheath composite spun fiber were aligned to prepare a tubular knitted fabric. The obtained tubular knitted fabric was smoothed with a smoothing agent (Maycatex HP-
(600 Meisei Chemical Co., Ltd.) was immersed in an aqueous solution containing 5%, dried (Pick up 100%) at 130 ° C. for 1 minute, and then cured at 150 ° C. for 2 minutes to obtain a sample. The obtained sample had good resistance to frictional melting and good performance after 50 washes.

[0025]

As is apparent from the above description, according to the present invention, it is possible to prevent perforation caused by friction with the floor during exercise, and to have excellent texture and dyeability as clothing, and to manufacture at low cost. It is possible to obtain a woven or knitted fabric having excellent abrasion resistance.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example (A) of a core / sheath composite spun fiber used in the present invention.

FIG. 2 is a cross-sectional view showing another example (B) of the core / sheath composite spun fiber used in the present invention.

FIG. 3 is a plan view schematically showing the structure of the woven or knitted fabric of the present invention.

FIG. 4 is a cross-sectional view schematically showing the evaluation method of the present invention.

[Explanation of symbols]

 1 core of composite spun fiber 2 sheath of composite spun fiber 3 knitted fabric to be evaluated 4 fulcrum 5 sample mounting arm 6 cylinder of 80φ cherry wood 7 load applied to sample

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location D03D 15/10 7199-3B D06C 7/02

Claims (2)

[Claims] 1. A core / sheath composite spun fiber composed of a polymer having a melting temperature of the polymer forming the core portion lower than that of the polymer forming the sheath portion by 40 ° C. or more is at least 30 out of the outer surface of the woven or knitted fabric. % Or more, and 0.1% by weight or more (relative to the fiber) of a leveling agent composed of at least one of paraffin-based, silicon-based, alkyl amide-based, and polyolefin-based on all fiber surfaces. Friction-melting woven and knitted fabric. 2. A core / sheath composite spun fiber composed of a polymer having a melting temperature of the polymer forming the core portion lower than that of the polymer forming the sheath portion by 40 ° C. or more is at least 30 out of the outer surface of the woven or knitted fabric. % Or more, the surface of the woven or knitted material is impregnated with an aqueous solution containing a smoothing agent of at least one of paraffin type, silicon type, alkyl amide type, and polyolefin type, and then at 100 ° C. or higher for 3 times.
The method for producing a woven or knitted fabric according to claim 1, wherein drying is performed for 0 seconds or more, and heat fixing treatment is performed at 130 ° C. or more for 30 seconds or more.