JPH03213575A - Treating lubricant for synthetic fiber intended for industrial material - Google Patents

Abstract

PURPOSE:To provide the title agent excellent in heat resistance and the adhesivity to tack agents, etc., for use in reinforcing esp. adhesive tapes, etc., comprising an aqueous emulsion with particle size not larger than a specified value with low emulsifier content containing a specific smoothing agent and an additive. CONSTITUTION:A smoothing agent where at least one kind of ester from a >=26C aliphatic and/or aromatic carboxylic acid and an alcohol accounts for >=60wt.% of the same is incorporated with an additive such as an anionic antistatic agent along with 0-10wt.% of an emulsifier (pref. an alkylene oxide adduct of a compound having at least one active hydrogen) followed by making a primary emulsification and then a high speed fluid flow atomization into an aqueous emulsion of <=1mum in particle size, thus obtaining the objective lubricant excellent in adhesivity and heat resistance without impairing the tack agent for matrices and the physical properties of rubbers. Despite small amount of said emulsifier incorporated, the emulsion is stable, giving strong interaction with e.g. a tack agent. Furthermore, the present lubricant has fuming- suppressive effect in carrying out a heat treatment.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an oil for treating synthetic fibers such as polyester and polyamide used for industrial material applications. More specifically, the present invention relates to a synthetic fiber treatment oil that has excellent adhesion to adhesives and rubber and excellent heat resistance, and is used particularly for applications such as adhesive tape reinforcing materials and electric wire covering materials.

[Prior Art] Synthetic fibers are excellent in terms of dimensional stability, high strength, low shrinkage, etc., and are therefore used as reinforcing materials for adhesive tapes, wire covering materials, and the like. In these applications, the important properties required are adhesion between the adhesive or rubber and the synthetic fiber, adhesion retention, and prevention of rubber deterioration. Furthermore, in the manufacturing process of synthetic fibers for these uses, heat treatment at high temperatures is generally performed, so the treatment oil applied to the fiber surface must also have excellent heat resistance.

Conventionally, as a method for obtaining synthetic fibers that have excellent adhesion with adhesives and rubber, minerals such as liquid paraffin that have little interaction with adhesives and rubber have been used, as described in JP-A No. 53-2696. Treated oil agents containing oil as a main component have been used, but with this method, the heat resistance of mineral oil is low, the generation of smoke is significant, and the deterioration of the working environment is a major impediment to practical use. Moreover, the improvement in adhesiveness itself was not satisfactory. Various studies have been conducted on oil compositions that improve adhesion, such as those proposed in JP-A No. 54-82497, but these have resulted in problems such as loss of fiber smoothness, smoke generation in the heat treatment process, etc. It was not completely satisfactory for practical use, as it generated tar and other substances and did not have sufficient heat resistance.

As a result of intensive studies, the present inventors found that the emulsifier component, which is blended in an amount of about 20 to 50% by weight in conventional treatment oil compositions, has extremely strong interaction with adhesives and rubber, and has a high adhesion with fibers. It was discovered that this is the main substance that impairs the adhesive strength of adhesives and the physical properties of rubber, leading to the present invention.

[Problems to be Solved by the Invention] The objects of the present invention are to prevent smoke generation during heat treatment without impairing the smoothness of the fibers, to have good adhesion to adhesives and rubber, and to provide adhesive-free adhesives. The purpose of the present invention is to provide a synthetic fiber treatment oil for industrial materials that does not weaken adhesive strength or cause rubber deterioration.

Means for Solving the Problems In other words, the present invention provides an oil composition in which an emulsifier component is blended into the smoothing agent component and the additive component, or in which 60% by weight or more of the △9 smoothing agent component has a total carbon number. one or more of 26 or more aliphatic and/or aromatic carboxylic acid esters, B, the blending ratio of the emulsifier component is 0 to 10% by weight in the total oil composition, and the average particle size of the oil particles The purpose can be achieved by using a synthetic fiber treatment oil for industrial materials, which is an aqueous emulsion with a diameter of 1 micron Goth or less.

The present invention will be explained in detail below.

The smoothing agent component of the treated oil composition of the present invention includes:
Among the conventionally known smoothing agents, aliphatic and/or aromatic carboxylic acid esters having a total carbon number of 26 or more are required,
It is preferable that the total carbon number is 30 or more.

Suitable examples include esters of monohydric alcohols such as oleyl laurate and oleyl ole-1 and monobasic aliphatic carboxylic acids, and monohydric alcohols and polyhydric alcohols such as dioctyl sebacate, dioleyl adipate, and ditridecyl diodipropionate. Basic aliphatic carboxylic acids, esters of sulfur-containing carboxylic acids, esters of monohydric alcohols and aromatic carboxylic acids such as dilauryl phthalate and l-helioyl trimellitate, ethylene glycol diolate, trimethylolpropane tricaprylate, glycerin Esters of polyhydric alcohols and monobasic aliphatic carboxylic acids such as triolate, bisphenol diole I-, and alkylene oxide-added esters such as lauryl (EO) n-octanoate as derivatives of these esters (however, alkylene oxide-added esters such as lauryl (EO) n-octanoate) If the number of moles is so large that the compound itself becomes soluble or self-dispersible in water, the smoothness will be impaired, so addition of 5 moles or less is preferable. It is not limited. Additionally, aliphatic and/or aromatic carboxylic acid esters having a total carbon number of less than 26, liquid paraffin, and mineral oils such as spindle oil are also preferable since heat resistance may be impaired due to the generation of smoke or tar when used alone. However, if less than 40% by weight of the smoothing agent component is mixed, it can be used within a range that does not impair heat resistance.

In addition, as the emulsifier component in the treated oil agent in the present invention, conventionally known emulsifier components can be used, but suitable examples include alkylene oxide adducts of compounds having one or more active hydrogens, such as lauryl alcohol, 1-stearyl alcohol, oleyl alcohol, etc. Alkylene oxide adducts of monohydric hydroxy compounds such as alcohol, octylphenol, and nonylphenol, polyhydric alcohol partial esters such as monooleic acid ester of glycerin, monolauric acid ester of sorbitan, distearic acid ester of trimethylolpropane, and alkylene oxide additions of these. products, alkylene oxide adducts of castor oil, alkylene oxide adducts of alkylamines such as laurylamine and stearylamine, alkylene oxide adducts of higher fatty acids such as myristic acid, stearic acid, and oleic acid,
and alkylene oxide adducts of amides derived from these fatty acids. Examples of alkylene oxide adducts include ethylene oxide,
Propylene oxide and the like are used alone or in combination.

In addition, polyethylene glycol polypropylene glycol block copolymers and anionic surfactants such as lauric acid 1-reethanolamine, oleic acid jetanolamine, and rho 1-oil can also be used as emulsifiers if they have emulsifying power. In the present invention, all components having emulsifying power are classified as emulsifier components.

However, the above-mentioned emulsifiers generally have a strong interaction with adhesives and rubber, and in the present invention, the emulsifier component reduces the adhesion between adhesives and rubber and fibers, decreases the adhesive strength of the adhesive, and further deteriorates the rubber. In order to avoid problems, the blending ratio of the emulsifier should be within a range where the emulsifier does not cause problems, that is, 0.
It is necessary to set it to 10 weight%, and it is more preferable to set it as 0 to 7 weight%.

Furthermore, in the treated oil agent of the present invention, additives may be added as necessary, namely, alkali metal salts of alkyl sulfonates, alkali metal salts of alkyl phosphates, alkali metal salts of polyalgylene glycol alkyl phosphants-1, fatty acid soaps, alkyl immobilizers, etc. In addition to antistatic agents such as Dacilin, conventionally known sizing agents, rust preventives, preservatives, antioxidants, etc. can be used simultaneously. These additives are blended according to the required characteristics of the treated oil agent, and the blending amount is not limited, but since smoothness and heat resistance may be impaired, it is preferably 1 to 6% by weight.

In the present invention, the average particle diameter of the oil particles must be 1 micron or less, preferably 0.7 micron or less, and more preferably 0.5 micron or less. If the average particle size exceeds 1 micron, the emulsion stability of the treatment oil will deteriorate and it will separate, so it cannot be put to practical use as a synthetic fiber treatment oil.

The method for producing the treated oil agent of the present invention is disclosed in Japanese Patent Application No. 63173063.
The method proposed in this issue is preferably applied.

That is, the blending ratio of the emulsifier component in the oil composition is 0 to 1.
In order to obtain an aqueous emulsion with a blending ratio of 0% by weight, that is, lower than the conventional blending ratio, and with good emulsion stability, a high-speed liquid flow atomization means for the treated oil agent is applied. If the mixing ratio of the emulsifier is 0 to 10% by weight, an aqueous emulsion cannot be obtained using only the stirring action of a conventional stirring device such as a homomixer or a propeller due to insufficient emulsifying power. Normally, the emulsified treated oil agent is practically used for 5 days or more, preferably 1 day.
It is required to maintain a stable emulsified state for more than 10 weeks.

The cause of poor emulsion stability is that the blending ratio of the surfactant, that is, the emulsifier component, is 10%, which is necessary to make the oil composition whose main component is a water-insoluble substance into fine particles and uniformly disperse it in water. This is because the emulsifying power is insufficient because the amount is less than % by weight, and the homomixers and the like that have been used conventionally do not have the ability to further divide the particles by mechanical shearing force.

However, in the present invention, the blending ratio of the emulsifier component is 10
Even if it is less than 20% by weight, if it is made into a temporary emulsified state by conventional emulsification means and then further processed by high-speed liquid flow atomization means, the average particle size of the oil particles of the treated oil can be made 1 micron or less, and 20 An oil agent that is comparable in emulsion stability to conventional treated oil agents containing about 50% by weight can be obtained.

In the present invention, industrial material uses refer to uses in which synthetic fibers are used in combination with organic and other materials, such as adhesives, rubber, coating materials, etc., particularly as adhesive tape uses and electric wire coating uses.

Here, as the high-speed liquid flow atomization means used in the present invention, it is preferable to atomize the oil particles by mechanical shearing force generated by increasing the flow rate of the processing liquid.

Synthetic fiber threads coated with the treated oil of the present invention have significantly less emulsifier components that interact strongly with adhesives and rubber compared to conventional treated oils. It has good properties, and there is no deterioration in the physical properties of the rubber, such as insulation resistance when used as a wire covering material. In addition, by using a specific smoothing agent component, heat resistance is also good, and since the blending ratio of the smoothing agent component is increased compared to conventional treated oil agents, aliphatic and/or Even if an aromatic carboxylic acid ester is used, smoothness is not impaired. For this reason, the synthetic fiber yarn to which the treated oil agent of the present invention has been applied is particularly suitable for the above-mentioned adhesive tape applications and electric wire coating applications among industrial material applications. In addition, it can also be used for tire cord applications, sail cloth applications, etc.

[Example] Hereinafter, the present invention will be specifically explained with reference to Examples. However, the present invention is not limited thereto.

Example 1 Oil stock solutions having the blending ratios of oil compositions shown in Nos. 1 to 3 in Table 1 were added to water with stirring to obtain a primary emulsion, and then a homogenizer (15H manufactured by Gorlin Co., Ltd.) was used as a high-speed liquid flow atomization means. -8TA type) (processing liquid flow rate 500
km/hr) L/h to make an aqueous emulsion.

2 The evaluation results of the oil agent particle diameter and emulsion stability in the obtained aqueous emulsion are shown in Table 2 Experiment Nos. 1 to 3. The oil particle diameter in the aqueous emulsion in the table is based on the centrifugal automatic particle size
The measurement was performed using a measuring device (CAPA-500 manufactured by Horiba, Ltd.).

As a comparative example, the evaluation results were shown in Experiment Nos. 4 to 7 of Table 2 when oil solution stock solutions having the blending ratios of oil compositions shown in Table 1 No. 1 to Cattle were made into aqueous emulsions using a homomixer.

Oils with a blending ratio of emulsifier components of 10% by weight or less as shown in Oil Compositions No. 1 to 3 in Table 1 lack emulsifying power, so when stirring with a conventional stirring device such as a homomixer, Table 2 Experiment N
As shown in Nos. 4 to 6, the particle size of the oil agent was large, and a water-based emulsion with good stability could not be obtained, and the emulsion completely separated into two layers within several tens of minutes. On the other hand, in the Examples of Experiments No. 3 to 3 in Table 2, the particle size was significantly reduced because the treatment was performed using a high-speed liquid flow atomization means, and the specific surface area was large, so the blending ratio of the emulsifier component was 10% by weight. It is possible to maintain a stable emulsified state even below. In addition, as a comparative example, Table 2 Experiment No. 7
An example was added in which a conventional oil composition (Table INa, 4) with a blending ratio of emulsifier components of 20% by weight was made into an aqueous emulsion using a homomixer, but the emulsifying power was still insufficient in this case, and the oil composition Since the average particle size of the particles exceeded 1 micron, separation was observed after one day.

Example 2 An oil stock solution having the blending ratio of the oil compositions listed in Table 3, Experiment Nos. 8 to 12 was heated to 70 to 80'C and added to 50°C warm water with stirring to obtain a primary emulsion. Thereafter, the mixture was treated with a homogenizer (Model 15H8TA manufactured by Gorin Co., Ltd.) (processing liquid flow rate 500 km/hr) to prepare a 15% by weight aqueous emulsion.

4 After uniformly applying a certain amount of the prepared treated oil onto a polyester film, a commercially available adhesive tape was used as a sample and the tensile strength was measured to evaluate the adhesion between the oil and the adhesive tape. did.

In addition, when polyethylene terephthalate was melt-spun at a spinning speed of 1100 m/min, a treated oil having the blending ratio of the oil composition listed in Table 3 was applied to the spun yarn at a pure amount of 0.7% by weight. I attached it so that it would look like this. The 1q undrawn yarn was drawn at a draw ratio of 3.5 mm, a drawing speed of 300 m/min, and a tar plate temperature of 220'C to obtain a drawn yarn of 240 denier/24 filaments. Adhesive tape was applied to the knitted fabric made using the drawn yarn thus obtained, and a load of 10
The adhesion between the fiber thread and the adhesive tape was evaluated by measuring the strength when peeling the adhesive tape using a sample that was left for 2 days under a load of Kg.

As a comparative example, the treated oils having the conventional oil compositions of Experiment Nos. 13 to 16 in Table 3 were made into 15% by weight aqueous emulsions using a homomixer.
A drawn yarn was prepared under the same conditions as above, and adhesiveness was evaluated under the same conditions.

In addition, the state of smoke generation during the drawing process of the yarns to which the treatment oils shown in Experiment Nos. 8 to 16 were applied was also evaluated.

Furthermore, commercially available silicone rubber-coated electric wires were immersed for 15 hours in the 15% by weight aqueous emulsion obtained using the oil composition shown in Table 3 by the above method, and then the insulation resistance value was measured based on JIS3005.

The above evaluation results are also shown in Table 3.

(The following is a blank space) 6 7 As shown in Experiment Nos. 3 to 12 in Table 3, the treated oil of the present invention has a low blending ratio of 10% by weight or less of the emulsifier component, which is a material that interacts strongly with the adhesive and deteriorates adhesion. Therefore, it has excellent adhesive properties.

Regarding the heat resistance of treated oils, smoke generation was observed in those using carboxylic acid esters having a total carbon number of less than 26 as a smoothing agent component.

In addition, silicone rubber-coated electric wires treated with the treated oil of the present invention exhibited significantly higher insulation resistance values than those treated with conventional treated oil, indicating that the treated oil of the present invention does not interact with rubber. It can be seen that there is no damage to the physical properties of the rubber.

[Effects of the Invention] The present invention eliminates conventional treatments that have extremely strong interactions with adhesives and rubber and are the main cause of deteriorating the adhesion with adhesives and rubber, the adhesive strength of adhesives, and the physical properties of rubber. By reducing the emulsifier component, which is about 20 to 50% by weight in the oil composition, it prevents smoke generation during heat treatment without impairing the smoothness of the fibers, and improves the adhesion with adhesives and rubber. This makes it possible to create a synthetic fiber treatment oil for industrial materials that has good properties and does not weaken the adhesive force of the adhesive or cause rubber deterioration.

Claims (1)

[Scope of Claims] In an oil composition in which an emulsifier component is blended into the smoothing agent component and the additive component or not, A, 60% by weight or more of the smoothing agent component is an aliphatic compound having a total carbon number of 26 or more and/or An aqueous emulsion containing one or more aromatic carboxylic acid esters, B, an emulsifier component in a blending ratio of 0 to 10% by weight based on the total oil composition, and an average particle size of oil particles of 1 micron or less. A synthetic fiber treatment oil for industrial materials, characterized by: