JPS59130317A - Polyester fiber for feather - Google Patents

Abstract

PURPOSE:To provide the titled polyester fiber having close resemblance to natural feather, and composed of polyester hollow filament having a specific elongation and a specific hollowness and composed of ethylene terephthalate recurring unit. CONSTITUTION:The objective polyester fiber for artificial feather is composed mainly of a polyester hollow fiber composed of ethylene terephthalate recurring unit, and having an elongation of <=4.5% under a load of 3.0g/d and a hollowness of >=15%. The single filament denier of the polyester fiber is preferably 4- 15 denier.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to polyester fibers for artificial feathers, which can be used in place of natural feathers for purposes similar to feathers.

. Currently, natural feathers are widely used as stuffing for down comforters, down wear, and cold-weather clothing, and have excellent properties such as volume, heat retention, and recovery, but as a limited natural resource material, feather It is not easy to increase the production of waterfowl (Booths and ducks) that can be harvested, making them expensive, and supply has not been able to keep up with the recent increase in demand.

Therefore, as a result of continued research into artificial feathers that have the characteristics of natural feathers and are inexpensive and highly productive, we focused on the structure of feathers and created an independent structure with a multidimensional structure that has repulsion properties. It has been proposed that a stuffing consisting of agglomerated feathers has properties that are much closer to those of natural feathers than the various materials that have been developed in the past.

Such an artificial feather structure was developed, for example, in 1987-11.
No. 2612 F! As disclosed in the book Am, there is known an annularly bent and fixed assembly.

The purpose of the present invention is to provide a polyester fiber that can maximize its properties when producing a filter structure. As a result of intensive research, the present invention has been achieved.

That is, the present invention mainly provides a polyester long fiber having one repeating unit of ethylene terephthalate, comprising: 3.
The polyester fiber for feathers is characterized by being a hollow fiber having an elongation under load of Of/de of 4.5 inches or less and a hollowness ratio of 15 coefficients or more.

The polyester referred to in the present invention mainly refers to polyethylene terephthalate consisting of a terephthalic acid component and an ethylene glycol component, but polyesters in which a part of the terephthalic acid component, usually 1 (molt) or less, is replaced with another dicarboxylic acid component. It may be a polyester and/or a polyester in which a part of the ethylene glycol component, usually less than 10 molar fraction, is replaced by another diol component. In addition, if necessary, for example, modifiers,
Stabilizers and the like may optionally be used.

The polyester fiber of the present invention is 4
．． It must satisfy the following requirements: it is a hollow fiber with an elongation of 5% or less, and a hollowness ratio of 15 inches or more. That is, 3. Of/de elongation under load is 4.5
If it exceeds 1, it will not be possible to obtain sufficient rigidity and formability to maintain the bulkiness of the annularly bent structure, and the durability of the aggregate will also be insufficient, and workability will also deteriorate.

Furthermore, in order to bring the characteristics of artificial feathers made of polyester fibers close to those of natural feathers, it is most important that the feathers be hollow fibers. Compared to non-hollow fibers, hollow fibers have a high bending rigidity that prevents the structure from sagging, maintains bulk for a long period of time, and provides even higher heat retention, which is very similar to the characteristics of natural feathers. You can get close. The hollow shape of the hollow fibers mentioned above may be a perfect circle or an irregular shape such as a triangle, but it is bulky like natural feathers.

To obtain heat retention, it must be thrown with a hollowness ratio of 15 inches or more. Even if the hollowness ratio is less than 15%, it is more effective than ordinary solid fibers, but it does not provide a satisfactory level as artificial feathers.

The polyester fiber used in the present invention preferably has a single yarn denier of 4 to 15 de.

When the single yarn denier is less than 4 de, it becomes difficult to maintain the bulkiness of the structure bent into a loop shape, and on the other hand,
When it is larger than 15 de, the rigidity increases 15 and there is a tendency for workability and texture to decrease.

Suitable for artificial feathers as described above 1. Polyester fibers can be industrially advantageously produced, for example, by the following method. That is, the intrinsic viscosity is 0.55 to 0.75.
Polyethylene terephthalate is spun in a molten state into a cooling zone using a hollow fiber spinneret and immediately quenched and solidified, and the obtained undrawn fiber is first heated at 60 to 110°C, preferably 7°C.
After preheating with a heating p-ra at 0 to 100°C, it is stretched 2.5 to 5.0 times, and then stretched to 200 to 380°C, preferably 250 to
Stretching 1-1 in a heating bath at 350°C so that the total stretching ratio is 3.0 to 7.5 times; further heat treatment for a fixed length in a heating bath at 200 to 380°C, preferably 250 to 350°C;
Perform shrinkage treatment of 0% or less. The thus obtained polyester long fibers are bent and fixed in a ring shape as described in, for example, Japanese Utility Model Application Publication No. 48-112612 and Japanese Patent Application Publication No. 56-166886 to form an artificial feather structure. This results in a good artificial feather that closely approximates natural feathers.

Examples of the present invention will be described in detail below.

Example Polyethylene terephthalate with an intrinsic viscosity of 0.66 was spun from a hollow fiber spinneret with 250 holes at a temperature of 290°C.
After spinning, it was immediately cooled and solidified with cooling air at 25°C, and then wound up at a constant speed.

In this case, the hollowness ratio was variously changed. The undrawn yarn was stretched at a moderate stretching ratio and then wound at a constant speed.

Next, a structure is made from the obtained drawn yarn by the method disclosed in JP-A No. 56-166886, and used as a stuffing material to improve its bulk and heat retention properties.

Table 1 shows the results of evaluating compression resistance.

Comparative Example 3 with regard to hollowness ratio ( ) is a solid fiber spun using a normal circular cross-section spinneret.

6- As is clear from Table 1, good artificial feathers can be obtained with the polynisful long fibers of the present invention having an elongation of 4.5 inches or more and a hollowness ratio of 15 inches or more under a 3 t/da load. (Experiments *1 to 3.8), but when the hollowness ratio is less than 15% (Experiment 44.5), bulkiness and heat retention are poor, and 3 f
/de If the elongation under load is less than 4.5% (experiment/l
67) has significantly poor durability.

Patent applicant Teijin Ltd. 8-

Claims (1)

[Claims] 1. Polyester long fibers mainly having repeating units of ethylene terephthalate, with an elongation under 3/do load of 4.596 or less and a hollowness ratio of 15
A polyester fiber for feathers, which is characterized by being a hollow fiber with a diameter of 1 or more.