JPH11286841A - Polyester spun yarn for blanket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject spun yarn recyclable easily, benign to the environment even if burnt, having bulky and soft feel and excellent in openability and dyeability, by including specific easily dyeable polyester short fibers. SOLUTION: This polyester spun yarn comprises polyester short fibers (each with an average fineness of pref. <=5 denier); wherein at least one kind of the short fibers is easily dyeable polyester short fibers such as of a copolyester copolymerized with 1.0-10 wt.% of at least one copolymerizable component selected from 5-sodium sulfoisophthalate and polyalkylene glycols, and the maximum variance of boiling water shrinkage is >=4.0%, and it is preferable that the easily dyeable polyester short fibers account for >=30 wt.% of the total constituent short fibers, and the short fibers with higher boiling water shrinkage account for >=20% of the total constituent short fibers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spun polyester yarn for blankets having improved spreadability and dyeability. More specifically, the present invention relates to a spun polyester yarn for a blanket which has a long bristle foot, is soft, has a high bulky property, and has improved openability and dyeability.

[0002]

2. Description of the Related Art In recent years, acrylic fibers have been widely used in blanket materials, especially in Meyer blankets and New Meyer blankets characterized by long bristle feet and bulkyness and softness.

[0003] Conventionally, a blanket, especially a Meyer blanket, has been tried by using polyester fiber in addition to acrylic fiber which is widely used by utilizing characteristics such as easy care property and durability of synthetic fiber. At present, in the case of using regular raw cotton, acrylic cannot be replaced with acrylic in terms of bulky, soft texture and coloring.

However, in recent years, the problem of garbage disposal has been highlighted and the public and private sectors have been working together to reduce the amount of garbage and conserve the environment and resources. .

[0005] As an effective use of used acrylic blankets and the like, there are cases where they are used as cushioning materials for furniture by moving, etc., or reused by changing the form for use as anti-hair, but acrylic is returned to the polymer itself and recycled into fibers again. It is difficult to use and is generally incinerated as combustible waste.

However, acrylic blankets and wool blankets generate hydrocyanic acid gas when burned due to their molecular structure, and there is concern about air pollution. Basically, incineration is not preferred.

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, the present invention has been made of acrylic fiber which has a bulky and soft texture, which is a major characteristic of an acrylic blanket, and has excellent dyeability. An object of the present invention is to provide a polyester spun yarn for a blanket for producing an excellent blanket that is easy to material-recycle and that is environmentally friendly even when burned, without impairing the great characteristics of the blanket.

[0008]

The present invention employs the following means to solve the above-mentioned problems. That is, the polyester spun yarn for a blanket of the present invention,
The constituent short fibers are polyester, at least one of which is an easily dyeable polyester short fiber, and the constituent polyester short fibers have a maximum boiling water shrinkage difference of 4.0% or more. It is assumed that.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The object of the present invention is to impair the above-mentioned problem, that is, the large characteristics of an acrylic fiber blanket having a bulky and soft texture and excellent dyeing properties, which are the major characteristics of an acrylic blanket. In addition, the company has been diligently examining the production of an excellent blanket that is easy to recycle and easy to material-recycle and that is environmentally friendly even when burned. When we made polyester spun yarns by combining them, we found out that they could solve such a problem at once.

[0010] The polyester spun yarn for blanket of the present invention is one in which the constituent short fibers are made of polyester, and at least one of the short fibers is an easily dyeable polyester short fiber. The short fiber is characterized in that a spun yarn is formed by combining the constituent requirements that the maximum boiling water shrinkage difference is 4.0% or more.

[0011] The polyester spun yarn for blanket can provide a deep blanket excellent in color development, which cannot be obtained with a conventional polyester fiber blanket, and is provided by, for example, an overprint facility used for a Meyer blanket or the like. The present invention can provide a dyed blanket having a sufficient depth even under normal pressure dyeing.

Such dyeability is achieved by easily dyeable polyester fibers. That is, as the easily dyeable polyester staple fiber referred to in the present invention, any polyester can be used as long as it shows easy dyeability as compared with ordinary polyester by copolymerization or the like.
-It is preferable to use a copolyester obtained by copolymerizing at least one copolymer component selected from sodium sulfoisophthalic acid and polyalkylene glycol. Preferred copolyesters used in the polyester spun yarn for blankets of the present invention include the copolymer component in an amount of 1.0%.
Those containing 10 to 10% by weight are preferably used from the viewpoint of easy dyeing and coloring.

Such an easily dyeable polyester staple fiber is excellent when the polyester staple fiber constituting the polyester spun yarn for blanket contains preferably at least 30% by weight, more preferably at least 50% by weight. Exhibits a coloring effect.

Further, the polyester spun yarn for blanket of the present invention has an excellent characteristic of having a bulky and soft texture in addition to such excellent dyeing properties. In the fiber, the maximum boiling water shrinkage difference is 4.0% or more, preferably 8.
This is achieved by satisfying the component requirement of 0% or more. When the maximum boiling water shrinkage difference is less than 4.0%, the pile composed of spun yarn cut in the heat treatment in the dyeing and finishing steps has poor so-called openness, and the pile lays down and cat hair It is in a state and can not bring out a sense of luxury.

The polyester short fiber having a maximum boiling water shrinkage difference of 4.0% or more and comprising the polyester spun yarn for a blanket is defined as the largest boiling water among the polyester short fibers. It means that the difference in boiling water shrinkage between the short fiber having the shrinkage and the short fiber having the minimum boiling water shrinkage is 4.0% or more. For example, when composed of three or more types of polyester short fibers, if the difference between the shortest fiber having the highest boiling water shrinkage and the shortest fiber among the three types of short fibers is 4.0% or more, Of course, the effect of the present invention can be achieved even if there are several types of short fibers having a boiling water shrinkage ratio in between.

The polyester spun yarn for a blanket of the present invention is the polyester short fiber having the largest difference in the maximum boiling water shrinkage among the polyester short fibers having the highest difference in the boiling water shrinkage, preferably at least 20% by weight, more preferably at least 20% by weight. Preferably, when the content is 30% by weight or more, the effect of the present invention is more suitably exhibited.

As the polyester short fiber having a high boiling water shrinkage, it is sufficient that the boiling water shrinkage is high. Regardless of the polymer component, it is possible to use polyethylene terephthalate or polybutylene terephthalate without any particular limitation. For example, the polyester short fiber having a high boiling water shrinkage ratio may be a short fiber obtained by drawing at a relatively low temperature and at a low magnification, and may be, for example, isophthalic so as to easily shrink the polymer itself. Acids, aromatic dicarboxylic acids such as 5-sodium sulfoisophthalic acid, aliphatic carboxylic acids such as sepasic acid and oxalic acid, and 2.2 bis {4- (2-hydroxyethoxy) phenyl} propane,・ 2 screws @ 4-
Polyester staple fibers produced from copolyesters obtained by copolymerizing glycols such as (2-hydroxyethoxy) phenyl} sulfone, spiroglycol and neopentylglycol may be used. Of course, such high-boiling water shrinkable fibers and the above-mentioned easily dyeable polyester short fibers may overlap, but in the present invention, if the easily-dying component and the high-boiling water shrinkage component sometimes overlap, it is so. It is also included when it is not.

The polyester spun yarn for a blanket of the present invention, when containing at least 20% by weight, more preferably at least 30% by weight, of such a polyester short fiber having the highest boiling water shrinkage, is preferred. The effect of (1) is more suitably exhibited.

The polyester spun yarn for a blanket of the present invention is one in which the constituent short fibers are made of polyester, and the constituent polyester short fibers have a cross section having at least one or more concave portions, and a fiber cross section. It has a feature in that it is composed of at least one type of modified cross-section fiber selected from flat fibers having a flattening ratio A expressed by a major axis / a minor axis of 1.5 ≦ A ≦ 3.0.

When such irregular cross-section fibers are not used, for example, in a round cross section, short fibers constituting the nap portion after blanking and shirring have a bad so-called cat hair state, and the surface quality of the blanket In addition, when print dyeing is performed, only the fiber surface is dyed, so that a so-called ring dyeing is easily caused, and it is difficult to express a deep color.

The polyester short fiber having at least one concave portion in the fiber cross section is, specifically, a fiber having a cross sectional shape as exemplified in FIG. 1, that is, a C-shaped cross section, π In addition to raw cotton having a cross-sectional shape such as a mold cross section and an H cross section, raw cotton having a multi-leaf cross section such as a Y-shaped cross section and a cross cross section can be used.

The flattening ratio in the present invention is represented by the value of the major axis / minor axis of the fiber cross section. Here, the major axis refers to the length of the longest part of the fiber cross section, and the minor axis refers to the length of the longest part in a direction substantially perpendicular to the major axis in the fiber cross section. Therefore, if the flattening rate A is in the range of 1.5 ≦ A ≦ 3.0, the flat polyester short fiber has a simple flat cross section, a triangular type, a dock bone type as shown in FIG. It is possible to use a cross-shaped or even a raw cotton having a flat cross-section having irregularities such as a ria-type shore on its major axis.

When the flatness A is less than 1.5, the same drawback as that of the above-mentioned round cross-section occurs. When the flatness A exceeds 3.0, the spinnability is extremely deteriorated, and the flat polyester staple fiber is used. Blankets made from the spun yarn used only give poor quality.

The irregular cross-section fiber is contained in the constituent polyester staple fiber preferably at least 30% by weight, more preferably at least 50% by weight, from the viewpoint of achieving the effects of the present invention.

The spun polyester yarn for blankets of the present invention preferably has an average fineness of short fibers of 5 denier or less.

The short fibers constituting the polyester spun yarn for a blanket of the present invention may contain a matting agent, and the matting agent is not particularly limited, but inorganic fibers such as titanium oxide, silicon oxide, and aluminum oxide may be used. Particles can be used, and antibacterial particles such as silver zeolite particles for imparting antibacterial performance, and conductive particles for imparting conductivity may be contained as necessary. It may have other functional particles.

The polyester spun yarn for a blanket of the present invention may be used in a small amount, other than polyester fiber, within a range not impairing the object of the present invention, a small amount of natural fibers such as wool, cotton, silk, etc., rayon, polyamide, polyacryl, and the like. Polyacetate,
It may contain chemical fibers such as polyvinyl or synthetic fibers. Furthermore, the polyester spun yarn for a blanket of the present invention may be a composite yarn with a filament yarn.

The blanket constituted by the polyester spun yarn for blanket of the present invention can be used for various blankets such as a tuft blanket, a woven blanket, a seal blanket, a Meyer blanket and a New Meyer blanket. It is suitably used for a Meyer blanket or a New Meyer blanket that emphasizes bulkiness. As a method of using such a blanket, a hanging blanket, a bed blanket, or an electric blanket may be used.

The method of dyeing the blanket is not particularly limited, and may be plain dyeing, but a print dyeing method using multiple colors is employed as one of the methods for easily bringing out the luxury of the color pattern. can do. This print dyeing method is preferably used for a Meyer blanket or the like.

[0030]

Next, the present invention will be described in more detail with reference to Examples and Comparative Examples. The evaluation method of various characteristics described in the present invention is shown below. Other evaluation methods conformed to the methods specified in JIS standards.

(Spreadability) The spread state of the surface of the blanket was visually determined, and evaluated on four scales from excellent (◎) to poor (×) in hair handling.

(Softness) The tactile sensation on the surface of the blanket was determined, and evaluated on a four-point scale from a soft one (）) to a coarse one (×).

(Bulkiness) The napped state on the surface of the blanket was visually judged, and evaluated on a four-point scale from excellent (◎) to inferior (立).

(Coloring property) After the corresponding sample was overprinted with a disperse dye, the sharpness of the print and the sharpness of the pattern were visually judged and evaluated in four steps from good (も の) to bad (x). evaluated.

Example 1 Short fibers having a fineness of 2 denier and a fiber length of 51 mm using a polyester polymer obtained by copolymerizing 3.8% by weight of 5-sodium sulfoisophthalic acid as the fiber A (boiling water shrinkage rate of 5%)
%) As a fiber B, using a polyester polymer obtained by copolymerizing 7.0% by mole of isophthalic acid and 4% by mole of 2.2 bis {4- (2-hydroxyethoxy) phenyl} propane with a fineness of 3 denier and a short fiber length of 51 mm. Fiber (boiling water shrinkage 18
%) In a ratio of 50:50 to prepare a spun yarn for blanket of the present invention of 24 count (cotton count) having a twist coefficient of 3.2. Using this spun yarn for pile, polyester long fiber (100d / 24f) as ground yarn, knitting using a double Russell machine, and overprint dyeing with disperse dye. This dyed fabric was brushed, sheared and polished to produce a Meyer blanket.

The obtained blanket had a good openness of the nap fibers constituting the blanket, a bulky property and a soft texture. A Meyer blanket having a color tone with a sufficient lightness difference was also obtained with the blanket in terms of color development.

COMPARATIVE EXAMPLE 1 Using only raw cotton having a denier of 2 denier and a fiber length of 51 mm and having a cross section of 51 mm in length, knitting, dyeing, brushing, and shearing polishing were performed to produce a Meyer blanket. did.

The blanket thus obtained has a poor opening property and no bulkiness, and has a poor texture of so-called cat hair.
Moreover, the coloring property was poor and the commercial value was low.

Example 2 A Meyer blanket was prepared for piles under the same conditions as in Example 1 except that the two types of raw cotton shown in Table 1 were used.

The obtained blanket had good openability of the nap fibers constituting the blanket, had a high bulkiness, and had a softer texture as compared with Example 1. The blanket also had a color tone with a sufficient difference in lightness in terms of color development, and a high-quality Meyer blanket was obtained. Example 3 For a pile, as a fiber A, a short fiber having a fineness of 2 denier and a fiber length of 51 mm (a boiling water shrinkage of 5%) and a fiber B using a polyester polymer obtained by copolymerizing 8% by weight of 5-sodium sulfoisophthalic acid were used. Example 1 is basically a short fiber (boiling water shrinkage 15%) having a fineness of 2 denier and a fiber length of 51 mm using a polyester polymer obtained by copolymerizing 8% by weight of 5-sodium sulfoisophthalic acid.
A Meyer blanket was prepared under the same conditions as described above.

As shown in Table 1, the resulting blanket was a Meyer blanket excellent in quality especially in openness, color development, and especially bulkiness.

Comparative Example 2 A Mayer blanket was prepared by knitting, dyeing, brushing, and shearing polishing under the same conditions as in Example 1 using only raw cotton having a fineness of 7 denier and a fiber length of 51 mm and having a cross section of 51 mm in fiber length. did.

As shown in Table 1, the obtained blanket had a coarse and hard texture and was poor in fiber opening property and color developing property, particularly poor in fiber opening property, bulky property and color forming property.

[0044]

[Table 1]

[0045]

According to the present invention, excellent spreadability, bulky, and especially soft texture with excellent color development, easy material recycling, and environmental friendliness even when burned. Blankets can be provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of a fiber shape of a cross section of a polyester short fiber having at least one concave portion in a fiber cross section, which constitutes a polyester spun yarn for a blanket of the present invention.

FIG. 2 is a cross-sectional view showing an example of a cross section of a flat polyester staple fiber constituting a polyester spun yarn for a blanket of the present invention.

[Explanation of symbols]

 None

Claims (11)

[Claims] 1. A short fiber constituting a polyester, at least one of which is an easily dyeable polyester short fiber, and a maximum difference in shrinkage of boiling water is 4.0% or more in the short polyester fiber. Polyester spun yarn for a blanket, characterized in that: 2. The polyester fiber according to claim 1, wherein said easily dyeable polyester-based short fiber comprises 5-
The polyester spun yarn for a blanket according to claim 1, wherein the yarn is constituted by a copolyester obtained by copolymerizing at least one copolymer component selected from sodium sulfoisophthalic acid and polyalkylene glycol. 3. The polyester spun yarn for a blanket according to claim 2, wherein the copolyester contains the copolymer component in an amount of 1.0 to 10% by weight. 4. The polyester spun yarn for a blanket according to claim 1, wherein the easily dyeable polyester staple fiber is contained in the constituent polyester staple fiber in at least 30% by weight. 5. The polyester spun yarn for a blanket according to claim 1, wherein said maximum boiling water shrinkage difference is not less than 8.0%. 6. The polyester spun yarn for blankets according to any one of claims 1 to 5, wherein the constituent polyester short fiber contains at least 20% by weight of a short fiber having a higher boiling water shrinkage. 7. The polyester spun yarn for blankets according to any one of claims 1 to 5, wherein the constituent polyester short fiber contains at least 30% by weight of a short fiber having a higher boiling water shrinkage. 8. The polyester staple fiber having a cross section having at least one or more concave portions, and an aspect ratio A expressed by a ratio of a major axis / a minor axis of the fiber section to 1.5 ≦ A ≦ 3.
The polyester spun yarn for blanket according to any one of claims 1 to 7, wherein the spun yarn is at least one kind of irregular cross-section fiber selected from 0 flat fibers. 9. The polyester spun yarn for a blanket according to claim 1, wherein the irregular cross-section fiber is contained in at least 30% by weight of the constituent short fibers. 10. The polyester spun yarn for a blanket according to claim 1, wherein the irregular cross-section fiber is contained in at least 50% by weight of the constituent short fibers. 11. The polyester spun yarn for a blanket according to any one of 1 to 10, wherein the constituent polyester short fibers have an average fineness of 5 deniers or less.