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Polyolefin fiber and method for producing same

A technology of polyolefin system and manufacturing method, which is applied in the direction of single-component polyolefin artificial filament, single-component polypropylene artificial filament, fiber treatment, etc., which can solve the limitation of fiber input, low recyclability, and production speed Variation and other problems, to achieve the effect of inhibiting fibrillation, high tensile strength, high nodular strength

Active Publication Date: 2019-03-15
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, this method has the following problems compared with common roll stretching, hot plate stretching, etc.: a special and expensive pressurized saturated steam stretching device is required, and further stretching in pressurized saturated steam The input amount of medium fiber will be limited, and the production speed will also deteriorate, so it is not suitable for mass production
[0008] However, this fiber has a higher specific gravity than polyolefin polymers, so it is disadvantageous from the viewpoint of weight reduction, and there is a problem that recyclability is low because it is a composite fiber of different types of polymers.

Method used

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  • Polyolefin fiber and method for producing same
  • Polyolefin fiber and method for producing same
  • Polyolefin fiber and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0141] A polypropylene resin (Nippon Polypropylene Co., Ltd. SA01A, MFR=10 g / 10 minutes (230° C., load 2.16 kg, 10 minutes)) as a core was put into a kneader, and a polypropylene resin as a sheath ( SA03 manufactured by Nippon Polypropylene Co., Ltd., MFR=29g / 10 minutes (230°C, load 2.16kg, 10 minutes)) was put into a kneader different from the kneader of the core, heated to 250°C for melt kneading, Make the discharge aperture from The core-sheath composite fiber discharged from a core-sheath composite spinning nozzle with 30 discharge holes is contacted with cold air at 20°C to cool and solidify, then oil is applied, and it is wound on a bobbin at a pulling speed of 300m / min. In the core-sheath type composite fiber, the core portion accounted for 50% of the fiber weight in an undrawn yarn, and was discharged at a discharge rate of 40 g / min (1.33 g / min per hole).

[0142] The obtained undrawn yarn was preheated using a hot roll so that the yarn temperature became 70°C, and s...

Embodiment 2

[0144] Except having set the draw ratio to 9.0 times, it carried out similarly to Example 1, and obtained the polyolefin multifilament. Table 1 shows the physical properties of the obtained polypropylene resin multifilaments.

Embodiment 3

[0146] As the sheath, polypropylene resin (Y2000GV manufactured by Prime Polymer Co., Ltd., MFR=18g / 10 minutes (230° C., load 2.16 kg, 10 minutes)) was used, and the discharge rate was 39 g / min from the nozzle (1.30 g / min per hole). minutes) to obtain an unstretched yarn, except that the draw ratio was set to 8.0 times, and the polyolefin multifilament was obtained in the same manner as in Example 1. Table 1 shows the physical properties of the obtained polypropylene resin multifilaments.

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Abstract

The present invention addresses the problem of providing polyolefin fiber that can be easily deformed against stress applied in the direction perpendicular to the fiber axis, has reduced fibrillation,and has excellent knot strength, and in particular, core-sheath composite polypropylene fiber. The problem of the present invention can be solved by having polyolefin fiber with which the compressivestrength, as calculated with formula 1, when compressively deformed by 30% relative to the fiber diameter in the direction perpendicular to the fiber axis in a single fiber is 30 to 51 MPa. St=2P / (Pi*L*d) (Formula 1) St: compressive strength (MPa), P: test force (N), d: single fiber diameter (mm), L: indenter diameter (mm)

Description

technical field [0001] The present invention relates to polyolefin-based fibers used for industrial materials, interiors of buildings, automobiles, etc., medical care, sanitation, clothing, and the like, and a method for producing the same. Background technique [0002] Polyolefin-based fibers such as polypropylene-based fibers have excellent water repellency, non-water absorption, and chemical resistance, are lightweight due to their low specific gravity, and are highly recyclable, so they are widely used in industrial materials, buildings, and automobiles etc. for interior decoration, medical / sanitary use, etc. In particular, industrial materials are widely used in ropes, maintenance nets, safety nets for construction, etc. due to their light weight and strength. However, in order to further reduce the weight, high strength fibers are required. [0003] On the other hand, in the case of using polyolefin-based fibers such as polypropylene-based fibers to obtain products su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/04D01F8/06
CPCD01D5/34D01F6/04D01F6/06D01F8/06D02J1/224B66D1/28C08L23/12C08L2203/12C08L2205/16D01F6/46D02J1/22D10B2321/022
Inventor 藤江正树高田昌幸山下友义池田裕信今北纯哉
Owner MITSUBISHI CHEM CORP
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