JPH0726326B2 - Method for preventing entanglement and damage of interlaced multifilament yarn woven by pasteless weaving in water jet loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a method of interlacing retention and damage prevention of interlaced multifilament yarns (hereinafter simply referred to as interlaced yarns) such as polyester and polyamide woven in a water jet loom without sizing. Regarding

Generally, when weaving a non-twisted or sweet-twisted multifilament yarn, a sizing agent is used in order to impart a sizing property to the multifilament yarn. However, from the viewpoint of improving productivity and product quality, there is a strong tendency to eliminate the use of glue,
Instead of using a sizing agent, an interlaced yarn obtained by subjecting the multifilament yarn to an interlace (air entanglement) process is used in order to impart the sizing property obtained by the sizing agent to the multifilament yarn. There is.

By the way, in recent years, in the industry, even for interlaced yarns, on the one hand, higher speed of weaving is strongly demanded, and on the other hand, it is also strongly demanded to manufacture a high-density fabric which is in high demand as a so-called differentiated fabric. . In order to satisfy such a requirement, it is important to maintain the interlaced yarns sufficiently entangled and at the same time sufficiently prevent damage.

The present invention relates to a method capable of sufficiently maintaining interlaced yarns and preventing damage of interlaced yarns that are woven without sizing in a water jet loom.

<Prior art and its problems> Conventionally, various methods of adhering an oil agent to an interlaced yarn and weaving without a paste have been proposed (JP-A-52-103545,
JP-A-57-35080). However, in any of these conventional methods, in order to meet the recent strong demands for high-speed production and high-density fabric production, the entanglement retention and damage prevention that can be imparted to the interlaced yarn by the attached oil agent are insufficient. There is a problem. In particular, when the interlaced yarns are woven by non-paste in the water jet loom by these conventional methods, the interlacing retention and damage are caused by the friction between the warps due to the vertical movement of the heddle and the friction between the warp and the heddle or the reed. There is a problem in that the preventive property is poor, and the loom is remarkably stopped as compared with the case where a sizing agent is used.

<Problems to be Solved by the Invention and Means for Solving the Problems> The present invention solves the above-mentioned conventional problems,
When weaving the interlaced yarn in a water jet loom without sizing, the interlaced yarn is provided with sufficient entanglement holding property and damage preventive property, so that the above-mentioned high speed and high density production of the interlaced yarn are required. It is an object of the present invention to provide an improved method capable of sufficiently responding.

However, as a result of earnest studies to obtain an improved method for solving the above-mentioned conventional problems, the present inventor 1) When a non-paste weaving agent used in the conventional method is attached to an interlaced yarn, Friction causes the entanglement of the interlaced yarns to become rather easy to be loosened, resulting in a decrease in the focusing property,
2) When a specific oil agent containing a predetermined amount or more of an oil agent main component containing a specific sizing agent component and a specific lubricating oil component in a predetermined ratio is attached to an interlaced yarn under predetermined conditions, fluffing of the interlaced yarn occurs. It is possible to prevent the disentanglement from being caused, and thus improve the converging property, that is, the interlace holding property, and at the same time improve the damage preventing property of the interlaced yarn. 3) The effect of improving the interlacing holding property and damage preventing property is to speed up weaving. The present invention has been completed by discovering the above facts, which are the most remarkable when applied to warp yarns having a large problem in a water jet loom used for.

That is, according to the present invention, prior to weaving the interlaced multifilament yarn in a water jet loom without sizing, in the warp preparation step, 8.5 to 1
1 wt% is an isobutylene homopolymer having an average molecular weight of 30,000 to 60,000, and the balance contains 85 wt% or more of the entire oil agent main component which is the following lubricating oil component, and the viscosity at 30 ° C is 50 to 150 cm. Stokes non-paste weaving oil is heated to 20 to 35 centistokes for the year, and straightened by a roller touch method, and the non-paste weaving oil is added to the interlaced multifilament yarn in an amount of 0.5 to 5 The present invention relates to a method for preventing entanglement and preventing damage of interlaced multifilament yarns woven by sizing without a water jet loom, which is characterized by adhering by weight%.

Lubricating oil component: a lubricating oil component which is one or more selected from mineral oils, animal and vegetable oils, and esters of higher fatty acids and monohydric alcohols, and has a viscosity of 5.5 to 100 centistokes at 30 ° C. In the invention, an isobutylene homopolymer having an average molecular weight of 30,000 to 60,000 is used. If the average molecular weight is less than 30,000, the resulting oil agent will significantly reduce the entanglement retention and damage preventive properties that can be imparted to the interlaced yarn. On the contrary, if it exceeds 60,000, the viscosity of the obtained oil agent will be too high, and it will be practical. It lacks sex.

In the present invention, as the lubricating oil component, mineral oils, animal and vegetable oils (sperm whale oil, olive oil, cottonseed oil, etc.), and esters of higher fatty acids and monohydric alcohols (methyl oleate, butyl stearate, octyl palmitate, oleic acid) One or more selected from oleyl and the like) are used. These lubricating oil components have a viscosity at 30 ° C of 5.5 to 100 centistokes. Part 30
If the viscosity at ℃ is lower than 5.5 centistokes,
After the obtained oil agent is attached to the interlaced yarn, the oil agent is volatilized and the amount of the attached oil agent is reduced, and the effect is reduced. On the other hand, if the viscosity at 30 ° C. is higher than 100 centistokes, the compatibility with the isobutylene homopolymer decreases, and the damage preventing property that can be imparted to the interlaced yarn by the obtained oil agent decreases.

The non-paste weaving oil agent used in the present invention is 8.5 to 1 in the oil agent main component.
1 wt% is the above-mentioned isobutylene homopolymer, and the balance contains 85 wt% or more of the entire oil agent main component which is the above-mentioned lubricating oil component. As the oil agent subcomponent which can be contained in the range of 15% by weight or less of the whole, there are known antistatic agents, emulsifiers, rust preventives and the like. When the content of the isobutylene homopolymer is less than 8.5% by weight in the oil agent main component that occupies 85% by weight or more of the whole, the entanglement retention that can be imparted to the interlaced yarn by the obtained oil agent decreases, and conversely from 11% by weight. If the amount is too large, the resulting oil agent reduces the smoothness that can be imparted to the interlaced yarn, and the damage preventive property also decreases. If the content of the main component of the oil agent in the non-paste weaving oil agent is less than 85% by weight, the effect obtained by the isobutylene homopolymer as described above becomes insufficient. And in the present invention, as a non-paste weaving oil at 30 ° C.
The viscosity at 50-150 centistokes is used. If the viscosity at 30 ° C. is lower than 50 centistokes, the interlace holding property that can be imparted to the interlaced yarn by such an oil agent is lowered, and conversely, if it is higher than 150 centistokes, such an oil agent remarkably becomes practical. It will be lacking.

The paste-free weaving oil used in the present invention has a temperature of 30 ° C as described above.
It has a viscosity of 50 to 150 centistokes and is significantly higher in viscosity than conventional oils of this type.
For this reason, the oil agent cannot be handled in the same manner as the conventional oil agent that is supplied as it is at room temperature. The non-paste weaving oil used in the present invention is heated to a viscosity of 20 to 35
When adjusted and applied within the range of centistokes, it adheres evenly to the interlaced yarn and exhibits the desired effect. Moreover, the oil agent is most effectively applied to the warp yarn, which is a problem in the water jet loom used for increasing the speed of weaving. Therefore, in the present invention, prior to weaving the interlaced yarn in the water jet loom without paste, in the warp preparation step, the paste-free weaving oil agent is heated to have a viscosity of 20 to 35 centistokes,
Lubricate straight by the roller touch method. In this case, the amount of the oil agent attached to the interlaced yarn is 0.5 to 5% by weight, preferably 1 to 3% by weight.

<Examples, etc.> Hereinafter, the configuration and effects of the present invention will be more specifically described with reference to Examples.

-Test Category 1 Each oil agent having the composition shown in Table 1 (Examples 1 to 5 and Comparative Examples 1 to 12) was prepared and refueled under the following conditions.

Interlaced yarn: A commercially available 50 denier polyester filament. The number of entanglements is 50 / m.

Refueling amount: 2% by weight.

Lubrication method: Roller touch method for straight lubrication. The viscosity of each oil was adjusted to 25 centistokes for refueling. Oils originally less than 25 centistokes were refueled at 30 ° C.

Then, for each interlaced yarn after lubrication, the entanglement retention, the fiber damage prevention and the metal smoothness were measured and evaluated by the following methods. The results are shown in Table 1.

.. Entanglement retention property After conducting a friction running test under the following conditions, the number of remaining entanglements was counted by the water floating method. In this case, 60m of thread is 1 in 5m increments.
It divided into 2 blocks, averaged the number of remaining confounding per 1 m for each block, calculated the subtotal value, and further averaged each subtotal value of 12 blocks.

Friction body: 6 mm x 10 mmφ chrome-plated satin cylinder.

Thread contact angle: 15 degrees.

Tension: 10g (after passing through the friction body).

Thread speed: 40m / min.

And the following criteria evaluated.

○ = remaining number of entanglements 31 / m or more △ = remaining number of entanglements 21-30 / m × = remaining number of entanglements 20 / m or less ・ Fiber damage prevention property A friction test was conducted under the following conditions The number of rubbing until breakage was measured. In this case, the friction test was performed 30 times under the same conditions, and the measured values at each time were averaged.

Testing equipment: Delicate-type thread friction binding tester.

Load: 100g.

F / F twist: 2 times (720 degrees).

Thread angle: 35 degrees.

Stroke length: 20 mm.

Cycle: 100 times / min.

Performed in a wet condition.

And the following criteria evaluated.

○ = 80 or more rubs before thread break △ = 40-79 rubs before thread break × = 39 or less rubs before thread break · · Metal smoothness A friction running test was performed under the following conditions: The frictional resistance (tension) was measured.

Friction body: 10mmφ chrome-plated satin cylinder x 5 pieces.

Thread contact angle: 345 degrees.

Initial tension: 10g Thread speed: 100m / min.

And the following criteria evaluated.

○ = Tension 89g or less after passing the friction body △ = Tension 90 to 109g after passing the friction body × = Tension 110g or more after passing the friction body -Test category 2 The oil agent of Example 1 was used, this was adjusted to the temperature and viscosity shown in Table 2, and the other conditions were the same as those of test category 1, and the same evaluation was performed. The results are shown in Table 2.

-Test category 3 As shown in Table 3, after adjusting each oil agent of Example 6 and Comparative examples 13 and 14 and supplying the warp with a warper, and evaluating in the same manner as in test category 1, the following conditions were applied. The non-paste weaving was performed in a water jet room, and the others were measured or observed.
The results are shown in Table 3.

Woven fabric: Polyester plain weave tabuta, 200 threads (1 thread is about 50
m).

Warp: 50 denier polyester, 50 entanglements / m.

Weft: 50 denier polyester.

Density: 100 pieces / inch, weft 82 pieces / inch.

Loom: Water jet loom LW-52 type (manufactured by Nissan Motor Co., Ltd.), 550 RPM.

<Effects of the Invention> As is apparent, in the present invention described above, when interlaced yarns are woven without a paste in a water jet loom, the interlaced yarns are provided with excellent interlacing retention and damage prevention properties, There is an effect that it is possible to sufficiently meet the recent demands for high speed and production of high density fabrics.

Claims (1)

[Claims] 1. Prior to weaving interlaced multifilament yarn in a water jet room without sizing, 8.5 to 11% by weight of the main component of the oil agent is isobutylene homopolymer having an average molecular weight of 30,000 to 60,000 in the warp preparation step. And the balance contains 85% by weight or more of the oil agent main component which is the following lubricating oil component, and the viscosity at 30 ° C is a paste-free weaving oil agent having a viscosity of 50 to 150 centistokes, and its viscosity is heated. 20-35 cm Stokes,
Entangling interlaced multifilament yarns for non-paste weaving in a water jet room, characterized in that this is straightly lubricated by a roller touch method, and 0.5 to 5% by weight of the non-paste weaving oil is attached to the interlaced multifilament yarns. Retention and damage prevention method. Lubricating oil component: one or more kinds selected from mineral oils, animal and vegetable oils, and esters of higher fatty acids and monohydric alcohols, and having a viscosity at 30 ° C of 5.5 to 100 centistokes.