JPH0346586B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a polyester fiber to which a specific oil agent is attached, and particularly to a versatile polyester fiber that can be used for both false twisting and textile applications. (Prior Art) A wide variety of oils have been developed for polyester fibers, and oils suitable for each purpose are used. For example, it produces less smoke, coloring, and tar, has excellent heat resistance, and has good lubrication performance.
An oil agent containing a diester of an alkylene oxide adduct of normal alkylene glycol and a higher fatty acid has been proposed as an oil agent particularly suitable for false twisting (Japanese Patent Application Laid-open No. 14897/1983). Also known is a method in which undrawn polyester yarn is treated with an oil agent containing a copolymer of ethylene oxide and propylene oxide, and then stretched and false-twisted (Japanese Unexamined Patent Publication No. 112594/1983). Furthermore, by treating the polyester yarn for textiles with an oil agent containing diethanol alkylolamide and its alkylene oxide adduct, it not only provides a high degree of lubricity but also reduces "sizing" during weaving.
It is known that the weaving efficiency and quality of textiles are improved by reducing the amount of carbon dioxide (Japanese Patent Publication No. 49-11359). (Problems to be Solved by the Invention) Conventional lubricants are designed according to each use, so even if you try to use fibers treated with an lubricant developed for a specific use for other uses, Unsatisfactory results are not obtained. For example, the oil-treated polyester fibers described in JP-A-50-112594 are suitable for false twisting, but when used in textile applications, the friction between the fibers and the metal is large. It cannot be used for weaving due to severe reed abrasion and needle abrasion during weaving. In addition, polyester fibers treated with oil described in Japanese Patent Publication No. 49-11359 are suitable for textile applications, but when subjected to false twisting processing, they emit smoke,
Coloration and tar generation become significant, making it impossible to perform satisfactory false twisting. An object of the present invention is to solve the problems of the prior art and to provide a versatile polyester fiber that can be used for both weaving and false twisting purposes. (Means for Solving the Problems) In order to achieve the above object, the inventors of the present invention, as a result of extensive studies, decided to attach an oil containing a specific compound in a specific ratio to polyester fibers. Therefore, for the first time, it has been discovered that the above object can be achieved, and the present invention has been achieved. That is, the present invention provides a diester of an alkylene glycol and/or its alkylene oxide adduct and a higher fatty acid represented by the following general formula ().
Contains 30 to 60% by weight, 10 to 30% by weight of a copolymer of ethylene oxide and propylene oxide, and 2 to 10% by weight of diethanol alkylolamide and/or its alkylene oxide adduct represented by the following general formula (). It is a polyester fiber characterized by having an oil agent attached to it. (R ₁ and R ₂ are alkyl groups having 7 to 21 carbon atoms, l is 1
~10 integers, m ₁ and m ₂ are integers from 0 to 10, n is 2 or 3) (R is an alkyl group having 8 to 20 carbon atoms, m ₁ and m ₂ are 0
an integer of ~20, n is 2 or 3) Alkylene as a raw material used to produce the diester of alkylene glycol and/or its alkylene oxide adduct and higher fatty acid contained in the oil agent to be attached to the polyester fiber of the present invention. Glycol has the above general formula where l is 1 to 10.
It is a linear saturated glycol. Particularly preferred examples include butanediol, pentanediol,
It is hexanediol. The alkylene oxide has 2 or 3 carbon atoms, and specifically includes ethylene oxide and propylene oxide. These are added to alkylene glycol as one or more copolymers. This copolymer may be either a random copolymer or a block copolymer. As the fatty acid, linear saturated fatty acids having 8 to 22 carbon atoms, unsaturated fatty acids, side chain fatty acids, or mixed fatty acids thereof, which are obtained from natural animal and vegetable oils and fats, can be used. The proportion of this diester in the oil composition needs to be 30 to 60% by weight. If the proportion of the diester is less than 30% by weight, the friction between the fibers and the metal will increase, sufficient lubricity will not be obtained, and weavability will deteriorate. Moreover, if it exceeds 60% by weight, smoking, coloring, and tar generation will increase during high-temperature heating, making it unsuitable for false twisting. Furthermore, the copolymer of ethylene oxide and propylene oxide used in the present invention is a block or random copolymer obtained from ethylene oxide and propylene oxide, or a random or block addition polymerization product of ethylene oxide and propylene oxide to alcohol. Examples of alcohols as addition bases include monoalcohols such as butanol, octanol, lauryl alcohol, and isocetyl alcohol, and polyhydric alcohols such as diethylene glycol, neopentyl glycol, trimethylolalkane, glycerol, sorbitol, and pentyl alcohol. Erythritol and the like are used. The addition ratio (weight ratio) of ethylene oxide and propylene oxide is preferably 97/3 to 3/97, particularly 35/65 to 10/90, and the molecular weight of the polyether is 1500 to 14000, particularly 2000 to Preferably within the range of 10000. The proportion of the copolymer in the oil composition needs to be 10 to 30% by weight. If it is less than 10% by weight, fiber-to-fiber friction becomes too large and uniform false twisting cannot be performed. On the other hand, if it exceeds 30% by weight, the fiber-to-fiber friction decreases, but the fiber-to-metal friction increases, leading to severe reed abrasion and needle abrasion, making it unsuitable for textile applications. Furthermore, the diethanol alkylolamide and/or its alkylene oxide adduct used in the present invention has an alkyl group having 8 to 20 carbon atoms. Further, the alkylene oxide is ethylene oxide or propylene oxide, and the number of moles added is 20 moles or less, particularly preferably 5 moles or less. The proportion of this amide component in the oil composition needs to be 2 to 10% by weight. If the amount is less than 2% by weight, the sizing agent will stick to the reed during weaving, and scum will be generated, resulting in poor weavability. On the other hand, if it exceeds 10% by weight, smoking, coloring, and tar generation increase during high-temperature heating, making it unsuitable for false twisting. General emulsifiers, higher alcohols, higher fatty acids, glycols, and small amounts of organic and inorganic compounds may be added to the oil agent used in the present invention for emulsification adjustment and stabilization. Moreover, antistatic agents, antioxidants, etc. can also be added. The oil agent may be applied to the polyester fibers by dispersing, emulsifying or dissolving the oil agent in water, and using a known method such as a roller oiling method, a spray method, a metered oiling method, or the like. In some cases, it may be applied to polyester fibers in the form of a straight oil agent without being dispersed, emulsified or dissolved in water. Adding oil to polyester fibers is usually done by
This is done in the process after spinning and before undergoing heat treatment.
It is preferable that the amount of oil applied to the polyester fibers is 0.2 to 1.0% by weight. The polyester fiber of the present invention is preferably made of polyalkylene terephthalate, particularly polyethylene terephthalate; It may also consist of a copolymerized polyester substituted with a dicarboxylic acid such as foisophthalic acid, or a diol such as diethylene glycol, 1,4-butanediol, neopentyl glycol, or polyethylene glycol. (Example) Hereinafter, the present invention will be specifically explained with reference to Examples. In the examples, all numbers in the blending ratio of oil agents represent parts by weight, and all percentages represent weight %. Examples 1 to 6, Comparative Examples 1 to 6 Each oil agent having the composition shown in Table 1 was emulsified in water to create an emulsion with a concentration of 12%. The undrawn polyethylene terephthalate yarn (228 denier/36 filament) is being collected.
Each oil was applied so that the amount of oil applied was 0.6%. Each of the undrawn yarns obtained in this way was drawn and twisted using a drawing and twisting machine at a drawing temperature of 90°C and a heat treatment temperature of 140°C.
The drawn yarn was drawn twice to obtain a 75 denier drawn yarn, each of which was divided into two groups, and one of the drawn yarns was sized to weave a plain weave taffeta fabric with a warp density of 72 threads/inch and a weft density of 52 threads/inch. The weavability was evaluated.
The other drawn yarn was false-twisted using a false-twisting machine under the conditions of a heater temperature of 220°C, spinner rotation speed of 550,000 rpm, and number of twists of 3500 T/m to obtain a crimped yarn. Twisting workability was evaluated. The results were as shown in Table 1.

[Table] As is clear from Table 1, the polyester fibers of the present invention (Examples 1 to 6) have good weavability and false twisting property, but the diester component (1,
When the amount of 6-hexanediol laurate ethylene oxide 5 mole adduct) is less than 30% (Comparative Example 1), the friction between the fibers and the metal increases, sufficient lubricity is not obtained, and weavability deteriorates. When it exceeds 60% (Comparative Example 2), smoking, coloring, and tar generation increase during high-temperature heating, and false twisting property deteriorates. In addition, when the copolymer component (ethylene oxide-propylene oxide copolymer) is less than 10% (Comparative Example 3), the fiber-to-fiber friction becomes too large and uniform false twisting cannot be performed; When it exceeds (Comparative Example 4), the fiber-to-fiber friction decreases, but the fiber-to-metal friction increases, reed wear and needle wear become severe, and weavability deteriorates. Furthermore, when the amide component (diethanololeiroamide ethylene oxide 5 mole adduct) is less than 2% (Comparative Example 5), the compatibility between the oil and the sizing agent decreases, resulting in poor sizing and stickiness. , scum is generated and weaving properties are deteriorated, and warper unwinding properties are also poor due to adhesion, and when it exceeds 10% (Comparative Example 6), smoking, coloring, and tar generation occur when heated at high temperatures. This results in a decrease in false twisting processability. Example 7, Comparative Examples 7 to 9 Each oil having the composition shown in Table 2 was emulsified in water to create an emulsion with a concentration of 12%. Each oil agent was applied to a certain undrawn polyethylene terephthalate yarn (228 denier/36 filaments) so that the amount of oil agent adhesion was 0.8%. Each of the thus obtained undrawn yarns was drawn using a drawing and twisting machine, with a drawing temperature of 90°C and a heat treatment temperature of 140°C.
The drawn yarn was drawn twice to obtain a 75 denier drawn yarn, each of which was divided into two groups, and one of the drawn yarns was sized to weave a plain weave taffeta fabric with a warp density of 72 threads/inch and a weft density of 52 threads/inch. The weavability was evaluated.
The other drawn yarn was false-twisted using a false-twisting machine under the conditions of a heater temperature of 220°C, spinner rotation speed of 550,000 rpm, and number of twists of 3500 T/m to obtain a crimped yarn. Twisting workability was evaluated. The results were as shown in Table 2.

【table】

[Table] As is clear from Table 2, the polyester fiber of the present invention (Example 7) coated with an oil containing three specific compounds has good weavability and false twisting properties. However, those to which an oil agent lacking one of the three types of compounds was attached (Comparative Examples 7 to 9)
cannot satisfy both weavability and false twisting property. (Effects of the invention) The polyester fiber of the present invention can be used for both textile applications and false twisting applications, and there is no need to apply separate oils depending on the application, simplifying the production process. In addition, since there is no need for the user to prepare many types of fibers for different uses, inventory management can be simplified.

Claims (1)

[Claims] 1 30 to 60% by weight of a diester of an alkylene glycol and/or its alkylene oxide adduct represented by the following general formula () and a higher fatty acid;
An oil agent containing 10 to 30% by weight of a copolymer of ethylene oxide and propylene oxide and 2 to 10% by weight of diethanol alkylolamide and/or its alkylene oxide adduct represented by the following general formula () is attached. A polyester fiber characterized by (R ₁ and R ₂ are alkyl groups having 7 to 21 carbon atoms, l is 1
~10 integers, m ₁ and m ₂ are integers from 0 to 10, n is 2 or 3) (R is an alkyl group having 8 to 20 carbon atoms, m ₁ and m ₂ are 0
An integer of ~20, n is 2 or 3) 2 The amount of oil attached to the polyester fiber is 0.2
1. The polyester fiber of claim 1 in which the content is 1.0% by weight.