JPH0684590B2 - Preparation method for spinning of antifouling modified polyester cotton - Google Patents

Description

TECHNICAL FIELD The present invention relates to a spinning preparation method for cotton-dying and oil treatment of polyester cotton which has been soil-proof modified at the stage of raw yarn.

"Prior Art" In recent years, as a surface modification method for synthetic fibers, a treatment method of imparting a modifier to an undrawn yarn and drawing the synthetic yarn has been mainly studied from the viewpoint of process simplification. Such modified fibers are usually spun, knitted and woven to finish into a product.
However, for a thick product having a pile such as a carpet, a process of dyeing with a cotton-like product, spinning, and producing the product is preferable. However, when the modified fiber is cotton-dyed with a dyeing machine such as Overmayer and then treated with a spinning oil agent, the modifier is swollen by the oil agent and drops off together with the oil agent and tends to become sticky, causing troubles in the spinning process. Not only that, it has a drawback that the antifouling performance of the product itself is significantly reduced.

"Object of the Invention" The present invention provides a product having excellent antifouling performance as well as solving troubles in the spinning process in the case where the cotton yarn dyed with the antifouling property modified at the raw yarn stage is treated with an oil agent. With the goal.

[Structure of the Invention] The present invention applies a fluorine-based water and oil repellent agent to an unstretched polyester fiber and then stretches it to dye an antifouling modified polyester cotton, and then dry heat treats it at a temperature of 100 to 180 ° C. Then, the spinning oil agent is treated.

Examples of the polyester to which the present invention is applied include polyethylene terephthalate, polybutylene terephthalate, polycyclohexane dimethylene terephthalate, polyoxyethoxybenzoate, polyethylene terephthalate.
Ethylene isophthalate, polyethylene terephthalate / butylene terephthalate, 5-sodium isophthalic acid copolymerized polyalkylene terephthalate, polyester ether elastomer, polyester polylactone elastomer, and their polyesters with polyalkylene glycols, organic phosphates, organic sulfonates, etc. Examples thereof include polyesters modified by blending with an antistatic agent, kaolin, silica, inorganic fine particles such as carbon black, and flame retardant, and may be a single type or a blend or a combination of two or more types. In the present invention, a fluorine-based water and oil repellent agent is usually added together with a spinning oil agent to an undrawn yarn obtained by melt-spinning the polyester by a conventional method, followed by drawing and optionally heat treatment.

As the fluorine-based water and oil repellent used in the present invention,
Reactive groups in the molecule such as epoxy groups, methylol groups,
A perfluoroalkyl group-containing oil repellent having a self-reactive group such as a chlorotriazine group or a blocked isocyanate group, a perfluoroalkyl group-containing oil-repellent group having a reactive group capable of reacting through a crosslinking agent such as a hydroxyl group, an amino group, or a carboxyl group. Fluoroalkyl group-containing oil repellent, quaternary ammonium base,
Perfluoroalkyl group-containing oil repellent having ionic group such as sulfonate group, polymer type obtained by copolymerizing perfluoroalkyl group-containing monomer having ethylenically unsaturated group with other ethylenically unsaturated monomer An oil repellent agent and the like can be mentioned, which are appropriately selected and used from those having an affinity with polyester. Many of these oil repellents are disclosed in JP-B-58-5.
It is disclosed in Japanese Patent No. 1544. In particular, a perfluoroalkyl group-containing oil repellent having an ionic group or a polyoxyalkylene chain (having surface-active ability) is used in combination with another perfluoroalkyl group-containing oil repellent, or a low molecular type oil repellent and a polymer type oil repellent are used. It is preferably used in combination with an oil agent. The oil repellent does not hinder the oil repellent and the antifouling property, and is a highly effective spinning oil agent,
In particular, a smoothing agent such as a fatty acid ester of a higher alcohol, a polybasic acid ester of a higher alcohol, a polyhydric alcohol ester of a higher fatty acid, etc. is mainly used, and if desired, mineral oil, polypropylene glycol, an organic phosphate ester salt, an organic subester, etc. It is used in combination with an oil agent containing a phosphate ester salt, a general anionic surfactant, and a nonionic antistatic agent. The amount of oil repellent applied to polyester fibers is usually
It is 0.03 to 1% by weight, preferably 0.05 to 0.2% by weight. If desired, a crosslinking agent such as polyepoxide such as polyalkylene glycol glycidyl ether or diethylene glycol diglycidyl ether or blocked polyisocyanate may be used in the treatment liquid. The amount of the cross-linking agent used depends on its type, but is preferably up to about 500% by weight, more preferably 5 to 50% by weight, based on the oil repellent.
Is particularly preferable.

The polyester fiber provided with the oil repellent and the spinning oil is subjected to a stretching heat treatment to be modified to prevent stain on the raw yarn. Next, after the cotton is dyed in the form of raw cotton using Overmeier, etc., washed, dried, heat treated,
Spinning oil agent processed. Normally, the modified polyester fiber can be dyed under atmospheric pressure, but the polyethylene terephthalate fiber usually produced by spinning requires high-pressure and high-temperature dyeing. In the present invention, the dyed cotton after cotton dyeing is 100 to 180 ° C.
It is important to heat treat at. When the dyed cotton is treated with a spinning oil agent without heat treatment, the polyester fiber and the oil-repellent film swell in the dyeing process and the oil-repellent film is easily peeled off. Due to its stickiness, etc., it is often lost in the semi-worsted spinning process, and the fibers are combined with the cut ends of the polyester fibers that have been ironed off and the polyester oligomers that have been generated from the raw yarn, and the fibers are processed in the gil process and the spinning process. This causes adhesion and winding on the take-up roller, resulting in a drawback that spinning becomes difficult. In addition, there is a drawback that the oil repellency and antifouling property of the product are significantly lowered. However, when the dyed cotton is heat-treated at 100 to 180 ° C., preferably 110 to 170 ° C. by the method of the present invention and then treated with a spinning oil agent, the spinning property is improved and spinning is possible under normal spinning conditions. Features such as excellent antifouling property without deterioration are obtained.

Table 1 shows the degree of drop of the oil repellent agent evaluated from the analysis of the sample of the spinning machine front bottom roller winding when heat treatment was performed and the heat treatment conditions were changed. As the spinning oil agent, liquid paraffin was mainly used, and an emulsion containing a fatty acid ester and an alkyl phosphate and a static agent was used. 0.7% by weight of the active ingredient and 5% by weight of water were attached to the fiber. I went.

From Table 1, it can be seen that the heat treatment at 100 ° C. or higher greatly reduces the loss of the oil repellent finishing agent.

The heat treatment can also be performed by drying at 100 ° C or more, and the heat treatment time depends on the state of the fiber, the fiber density, etc., but the moisture content is usually 0.5% by weight or less, preferably 0.2% by weight.
It is a time longer than or equal to the drying time until the temperature becomes the following, and it is particularly preferable to carry out some additional heating after drying. Therefore, the heat treatment is preferably performed by forcibly blowing or sucking hot air. However, heating for too long is not necessary, and usually 10 minutes or less is sufficient. When the temperature exceeds 180 ° C, crimping of fibers begins to occur and product quality defects occur. The spinnability is remarkably improved by such heat treatment. This is because the oil repellent coating on the fiber surface is densified so that the oil repellent coating is no longer swelled by the spinning oil, and the spinning oil repels. It is considered that this is because a layer is formed on the surface of the oil processing agent to effectively reduce the friction coefficient. This is modeled after treating the oil-repellent finishing agent film formed in the shearle while changing the heat treatment temperature, dropping the spinning oil agent on the obtained film, and examining its swelling property and tackiness. It can be inferred from the results in the table.

That is, a film heat-treated at 100 ° C. or higher, especially 120 ° C. or higher shows almost no permeation of the spinning oil agent nor swelling by the oil agent.

As the spinning oil used, higher alcohol alkylene oxide adduct, higher fatty acid alkylene oxide adduct,
Polyoxyethylene alkylamide, polyoxyethylene alkylamine, random or block copolymer of oxyethylene and oxypropylene, tetronic type activator, higher alkyl phosphate, phosphate of higher alcohol alkylene oxide adduct, polyoxyethylene-modified organopoly Siloxane, liquid paraffin, etc. are exemplified, and are used alone or in an appropriate combination of two or more in consideration of smoothness, bundling property, antistatic property, and oil repellency of the product. However, particularly preferable is an oil agent mainly composed of an oil agent having a large property of being thermally decomposed or volatilized when it is manufactured and heat treated.
An oil agent mainly containing liquid paraffin is particularly preferable.

The amount of spinning oil added is usually 0.3 to 1.5% by weight as an active ingredient.
And preferably 0.5 to 0.8% by weight.

The polyester fiber thus obtained is used alone or in a mixture with other undyed oil-repellent processed fiber to produce a spun yarn for commercialization. It is particularly suitable as a pile yarn for carpets, and after laminating a latex as a carpet, the pile surface is 110-150.
An excellent oil and soil repellent and antifouling function can be imparted by heat treatment at ℃, preferably 120 to 140 ℃, lower surface 110 to 170 ℃, preferably 120 to 150 ℃.

Hereinafter, the present invention will be described with reference to examples. In the examples,% means% by weight.

Example N-n-propylperfluorooctanesulfonamide An oil repellent obtained by blocking the terminal isocyanate group of an adduct of 1 mol of ethanol and 1 mol of tolylene diisocyanate with isopropyl alcohol and perfluoroalkyl acrylate / ethyl acrylate / polyoxyethylene acrylate. Melt spinning oil containing 20% emulsion containing 1: 1 weight ratio of copolymer, polyoxyethylene (EO3 mol) phosphite potassium 2%, polyoxyethylene (EO10 mol) lauryl ether 2% It is applied to spun polyethylene terephthalate unstretched fiber tow (0.07% as an oil repellent), stretched, heat set and crimped.
8d, 128 mm cut length staples were obtained.

The staples obtained are dyed at 60 ° C with an Overmayor dyeing machine.
High pressure dyeing, reduction washing, water washing, dehydration, dry heat treatment at 120 ° C for 5 minutes with a saxion plate dryer,
A modified cotton having a water content of 0.1% was obtained. Then, as spinning oil, Derion TX-1 (Takemoto Yushi Co., focusing, smoothing agent) and TX-
Each of 50 (Takemoto Yushi Co., antistatic agent) 0.7, 0.05% and water 5
% By spraying when blending and blending in a wool bottle 3 times,
When the aged cotton was passed through a curd, a gills process, and a spinning under normal conditions, it was in a completely normal operating condition.

Further, the obtained spun yarn was put into a tufting machine, and the backing was subjected to tufting, splitting, and latexing, and then the pile surface was dried at 120 ° C. and the back surface was dried at 140 ° C.

The pile was then homogenized by makeup shearing. The obtained carpet was oil-repellent (AATCC method 118-1975) grade 5 and had excellent antifouling properties.

On the other hand, the comparative example treated in the same manner as the example except that it was dried at 80 ° C. for 5 minutes after being dyed with cotton had many winding problems around the roller and could not be industrially produced. Antifouling performance was also insufficient.

Claims (2)

[Claims] 1. An antifouling modified polyester cotton obtained by applying a fluorine-based water and oil repellent agent to an unstretched polyester fiber, and then stretching it, and then dry heat treating at a temperature of 100 to 180 ° C., followed by spinning. A method for preparing spinning of antifouling modified polyester cotton, which comprises treating with an oil agent. 2. The spinning preparation method for antifouling modified polyester cotton according to claim 1, wherein the spinning oil agent is a spinning oil agent containing an oil agent having thermal decomposability or thermal volatility as a main active ingredient.