JP2813054B2 - Method for producing bulky and high-density woven fabric for industrial materials - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a bulky and high-density woven fabric for industrial materials, and more particularly to a method for manufacturing a bulky woven fabric for industrial materials by using a potentially bulky composite yarn. It is another object of the present invention to provide a method for producing a high-density bulky woven fabric for industrial materials.

[Conventional technology]

Since polyester fibers have various excellent properties, they are widely used not only for clothing but also for general industrial materials. In industrial material applications, after weaving, there are many cases where rubber or resin is adhered and used as a composite, for example, as seen in JP-A-63-12730, bulkiness is applied to the yarn surface. There has been proposed a method of improving the adhesive force with rubber or resin by applying the composition.

Furthermore, in recent years, for example, in outdoor tents and airbags, high-density bulky fabrics having high airtightness and high adhesiveness have been required.

However, in response to these demands, in the prior art, since the raw yarn has bulkiness, it is difficult to weave at high density, and improvement in productivity by high-speed weaving cannot be expected.
On the other hand, if weaving is carried out at a high temperature after weaving to a low density, there is an obstacle that the adhesive strength is reduced due to the decrease in bulkiness and the strength is also reduced.

[Problems to be solved by the invention]

The present invention has been made in view of the above-mentioned problems of the prior art, and has been developed using a potentially bulky composite yarn exhibiting high strength, high airtightness, and high adhesiveness suitable for industrial use such as outdoor tents and airbags. An object is to provide a bulky and high-density woven fabric for materials.

[Means for solving the problem]

The present invention relates to producing a bulky high-density woven fabric for industrial materials using a composite yarn composed of two types of polyester yarns having different dry heat shrinkage ratios. Yarn A and 80 ° C. for yarn A
The difference in the dry heat shrinkage of the yarn is within the following range: 10% ≦ (dry heat shrinkage of yarn A−dry heat shrinkage of yarn B)
≦ 20%, and the yarn B having a ratio of 10 to 60% by weight of the total composite yarn is used. The composite yarn has an entangled portion in a range of 5 to 100 / m and has a maximum tensile strength. Strength under load
Production of a bulky high-density woven fabric for industrial materials, characterized in that a latent bulky composite yarn of 6 g / d or more is woven at a high density using a warp and a weft, and the fabric is subjected to a relaxation treatment at a low temperature of 80 ° C or less. Is the way.

The latent bulky composite yarn constituting the bulky high-density woven fabric for industrial materials produced by the present invention comprises two types of polyester yarns.

One yarn A constituting the latent bulky composite yarn can be easily obtained from a polyester obtained by copolymerizing the third component with ethylene terephthalate units in an amount of 8 to 30 mol%. As the third component to be copolymerized with polyethylene terephthalate,
Examples include, but are not limited to, difunctional carboxylic acids such as isophthalic acid, naphthalenedicarboxylic acid, and adipic acid, and diol components such as neopentyl glycol, diethylene glycol, and propylene glycol. If the copolymerization amount of the third component is less than 8 mol, the desired shrinkage ratio cannot be obtained. On the other hand, if it exceeds 30 mol%, fusion of chips during solid-phase polymerization performed by a known method or Poor biting of chips at the time of melting and discharging is likely to occur.

Further, the third component to be copolymerized is not limited to one type, and a plurality of components may be combined and copolymerized so that the total copolymerization amount is 8 to 30 mol%. Also, these polyesters
Additives such as stabilizers and colorants may be included.

In order to obtain a composite yarn having a strength of 6.0 g / d or more used in the present invention, the intrinsic viscosity [η] of the polyester fiber of the yarn A is preferably 0.60 or more, and more preferably 0.7 to
0.8.

The other yarn B used in the present invention preferably has an ethylene terephthalate unit content of 90 mol% or more, more preferably 95 mol% or more. Such a polyester may contain a copolymer component as described above in a proportion of preferably less than 10 mol%, more preferably less than 5 mol%, and is preferably polyester terephthalate. The polyester may contain additives.

In order to obtain a composite yarn having a strength of 6.0 g / d or more used in the present invention, the intrinsic viscosity [η] of the polyester fiber of the yarn B is preferably 0.80 or more, more preferably 0.9 to 0.90.
1.0.

By using these polymers and spinning and drawing by a conventionally known method, yarn A and yarn B constituting a potentially bulky composite yarn can be obtained.

Yarn A constituting latent bulky composite yarn used in the present invention
Has a dry heat shrinkage at 80 ° C of 20% or more, and if it is less than 20%, the difference in shrinkage from yarn B is small, and even when subjected to a relaxation treatment at a low temperature, the bulkiness is low and high adhesiveness is exhibited. do not do. However, if it is too high, a flat woven fabric cannot be obtained after weaving and relaxation treatment.

The preferable range of the dry heat shrinkage at 80 ° C. of the yarn A is 25 to 30.
%.

The other yarn B has a difference in dry heat shrinkage at 80 ° C. from yarn A of 10% ≦ (dry heat shrinkage of yarn A−dry heat shrinkage of yarn B). ≦ 20. If the difference between the dry heat shrinkage ratios of the yarn A and the yarn B is less than 10%, the bulkiness is reduced and high adhesiveness is not exhibited, while if it exceeds 20%, the proportion of the yarn B is excessive. When a composite is obtained by attaching a resin to the obtained woven fabric, the resin does not flow in, and bubbles are easily generated, so that the adhesive strength is reduced.

Furthermore, in the production method of the present invention, the ratio of the yarn B to the entire composite yarn is 10 to 60% by weight. When the proportion of the yarn B is less than 10% by weight, the bulkiness is low even at low-temperature relaxation treatment, and high adhesive strength is not exhibited. Cloth cannot be obtained.

The latent bulky composite yarn used in the present invention has an entangled portion in the range of 5 to 100 / m. By appropriately entanglement of the yarn A and the yarn B, the release of the yarn B is prevented, and the entanglement of the yarn A and the yarn B creates a void inside the yarn after the relaxation treatment.

These voids serve to allow the resin during resin processing to penetrate as much as possible into the interior of the yarn A. When the yarn A is in the narrowed state, if there is almost no void, it is difficult to penetrate the resin into the inside of the yarn A, and the resin adheres only to the outer layer portion of the yarn A, and the adhesiveness is reduced. If the entangled portion is less than 5 / m, the entangled portion between the yarn A and the yarn B is almost nil, and the yarn B is separated. On the other hand, if the entangled portion exceeds 100 / m, it is difficult to distinguish between the yarn A and the yarn B, so that the number of linear fibers of the yarn A decreases, and conversely, the number of curved fibers increases and the elongation increases by 1%. The stress at the time tends to decrease. This confounding number is preferably 20 to 60 pcs / m
It is.

The latent bulky composite yarn used in the present invention has a maximum tensile load strength of 6 g / d or more, preferably 6.2 to 6.7 g / d.

When the strength at the maximum tensile load is less than 6 g / d, when used as an industrial material such as an outdoor tent or an airbag, the fatigue resistance is low and there is a practical problem.

The latent bulky composite yarn used in the present invention can be obtained by, for example, an apparatus shown in FIG.

That is, in FIG. 1, the first supply rollers 3 and 4 and the cot rollers 5 and 6 are used, respectively, using the original yarn 1 that becomes the yarn A and the original yarn 2 that becomes the yarn B obtained by the method described above. , And is supplied in accordance with the mixing fiber nozzle (interlace nozzle) 7, and further wound between the cot roller 8 and the second supply roller 9 by winders 9 and 10.

At this time, the first supply roller 3
In the peripheral speed difference between the second feeding roller 9 and the second feeding roller 9, the pre-stretching state is adjusted to a constant length or about 1.003 to 1.005, and they are simultaneously supplied. Here, yarn A (raw yarn 1)
Has potentially high shrinkage at low temperatures, and
The point of the present invention is that the composite yarn obtained by simultaneously supplying (the original yarn 1) and the yarn B (the original yarn 2) is a fiber which does not potentially exhibit bulkiness.

Twist the latent bulky composite yarn obtained as described above,
This is used for warp and weft and woven to form a plain fabric (taffeta), and then subjected to a relaxation treatment at a low temperature of 80 ° C or lower, whereby the bulky high-density woven fabric for industrial materials of the present invention is obtained.

Further, if the temperature of the relaxation treatment exceeds 80 ° C., the yarn B exhibiting bulkiness causes a decrease in strength due to heat. Therefore, the temperature of the relaxation treatment is preferably from 60 to 80 ° C.

〔Example〕

Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples.

In addition, the measured value and evaluation used in this example were measured or evaluated as follows.

Intrinsic viscosity of the yarn [η] The solution was melted at a temperature of 130 ° C at a ratio of 1.2 in 100 ml of _F- orthochlorophenol and measured at a temperature of 25 ° C using an Ostwald viscometer.

Tensile strength and elongation of bulky composite yarn Using a tensile load measuring device (Tensilon UTM-II type), JIS
It was measured according to L-1074-64.

The yarn strength (g / d) was obtained by measuring the load at the time of cutting with a tensile load measuring device, repeating this five times, finding the average load, and dividing by the denier.

Yarn strength = load / denier (g / d) The elongation (%) was obtained by measuring the elongation at the time of cutting simultaneously with the measurement of the yarn strength, repeating this five times, and obtaining the average elongation.

Dry heat shrinkage yarn to, hung with a 1/10 weight of denier yarn, marked at intervals of length L _0, it in unstretched state
Was treated for 1 minute at 80 ° C. in an oven, the length of the mark hung with the same load again the yarn after the treatment from the length L ₁ was measured, and the shrinkage factor was calculated by the following equation.

Dry heat shrinkage (%) = [(L ₁ −L ₀ ) / L ₁ ] × 100 Entanglement degree The yarn is hung with a load of 1/30 of the denier of the yarn, and marked at 50 cm intervals. The number of entangled portions during that time was measured by the hook drop method.

The load is 1/10 of the denier of the yarn, and the average number is obtained by repeating 10 times, and the average number is doubled and expressed as ke / m.

Weaving property Using a rapier-type loom, weaving was performed at a high speed at a reed rotation speed of 300, and the number of stops per day was evaluated (however, stoppage due to mechanical failure was excluded).

○: 0 to 2 times / day ○ to △: 3 to 5 times / day △: 6 to 8 times / day ×: 9 times or more Adhesion Using a Scott-resistant massage tester, test 500 times with a 3 kg load and peel. The degree was evaluated by observing the interface between the resin and the woven fabric.

 ：: Almost no peeling.

 Δ: Some peeling was observed.

 Δ to ×: There is an adhesive part, but about half of the part is peeled off.

 X: Almost peeled.

Examples 1 and 2, Comparative Examples 1 to 6 A polyethylene terephthalate chip having an intrinsic viscosity shown in Table 1 measured with a 25 ° C. orthochlorophenol solution obtained by copolymerizing neopetyl glycol (NPG) at a ratio shown in Table 1 was used. The melt was melted by an extruder and metered and discharged by a gear pump from a die having a hole diameter of 0.35 mm so that the total denier of the drawn yarn became the denier shown in Table 1. The discharged yarn passes through a heating atmosphere of 300 mm in length and 270 ° C. provided under the die, and then a relative humidity of 6 mm over 300 mm in length.
Cooling air of 5% at a temperature of 25 ° C. was blown at 5 Nm ³ / min to be cooled and solidified.

After cooling and solidifying the yarn, an oil agent was applied by an oiling roller, and the yarn was once taken up as a package of an undrawn yarn at a take-up speed of 1,000 m / min.

After the obtained undrawn yarn is preheated by a heated supply roller, the first stage drawing is performed between the rollers, and the second stage drawing is further performed in a drawing gas bath, and then the speed is 290 m / min. To obtain a denier yarn A having a total denier shown in Table 1.

Further, a polyethylene terephthalate chip having an intrinsic viscosity shown in Table 1 measured with an orthochlorophenol solution at 25 ° C. was melted with an extruder, and the total denier of the drawn yarn was set to the denier shown in Table 1 through a die having a pore diameter of 0.4 mm. Was metered and discharged with a gear pump. The discharged yarn is passed through a heating atmosphere of 200 mm in length and 350 ° C. provided under the die, and then cooled by 5 Nm ³ / min. At a relative humidity of 65% and a temperature of 25 ° C. over a length of 300 mm. It was blown and solidified by cooling. The cooled and solidified yarn is oiled with an oiling roller and then taken up at a speed of 700 m / min with a take-off roller.
The undrawn fiber is once drawn continuously at an appropriate draw ratio without being wound, subjected to relaxation heat treatment, and then wound at a speed of 3,300 m / min to obtain a denier yarn B shown in Table 1. Was.

The yarn A and the yarn B shown in Table 1 are supplied by the first supply rollers 3 and 4 (peripheral speed 200.6 m / min) shown in FIG. 1, and the interlace nozzle 7 (compressed air pressure 5.0 kg / cm) is supplied. ² ), the fiber was taken up at 200 m / min by the second supply roller 9 and wound up by the winder 10. Table 2 shows the physical properties of the obtained composite yarn.

The composite yarn was twisted at a twist number of 150 T / M and used as a warp and a weft to prepare a plain woven fabric (taffeta) having a woven fabric density of 25 warp / inch and 26 wefts / inch.

The obtained woven fabric was subjected to a relaxation treatment for 1 minute in a dry heat bath at 80 ° C. to produce a bulky high-density woven fabric.

This bulky and high-density woven fabric was processed with a PVC resin to form a PVC-processed cloth, and then its adhesiveness was evaluated.

 The results are shown in Table 2.

Comparative Example 7 A bulky high-density woven fabric was manufactured in the same manner as in Example 1 except that the interlace nozzle 7 was removed when the yarns A and B shown in Table 1 were mixed.

 The results are shown in Table 2.

Comparative Example 8 A bulky and high-density woven fabric was produced and evaluated in the same manner as in Example 1, except that the relaxation treatment of the woven fabric was changed to 30 minutes in a dry heat bath at 100 ° C.

 The results are shown in Table 2.

Example 3 A bulky and high-density woven fabric was produced and evaluated in the same manner as in Example 1, except that the copolymer component of the yarn A was isophthalic acid of 15 mol% and a copolymerized polyester having an intrinsic viscosity of 0.73 was used. The results are shown in Table 2.

[Effects of the Invention] According to the present invention, it is possible to provide a bulky, high-density woven fabric for industrial materials that exhibits high strength, high airtightness, and high adhesiveness, which is suitable for industrial use such as outdoor tents and airbags.

[Brief description of the drawings]

FIG. 1 shows an example of an apparatus for producing a potentially bulky composite yarn used in the present invention. 3, 4: First supply roller 7: Interlace nozzle 9: Second supply roller 10: Winder

──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. ⁶ identification code FI D06C 7/00 D06C 7/00 Z (58) Field surveyed (Int.Cl. ⁶ , DB name) D03D 15/00 D02J 1 / 00 D02G 3/04 D06C 7/00

Claims (1)

(57) [Claims] When producing a bulky and high-density woven fabric for industrial materials using a composite yarn comprising two types of polyester yarns having different dry heat shrinkages, the polyester yarn has a dry heat shrinkage at 80 ° C of 20%. The above-described yarn A and the yarn A at 80 ° C.
The difference in the dry heat shrinkage of the yarn is within the following range: 10% ≦ (dry heat shrinkage of yarn A−dry heat shrinkage of yarn B) ≦
20% and the yarn B having a ratio of 10 to 60% by weight of the total composite yarn is used. The composite yarn has a confounding portion in the range of 5 to 100 / m and the maximum tensile load. When the intensity is
Production of a bulky high-density woven fabric for industrial materials, characterized in that a latent bulky composite yarn of 6 g / d or more is woven at a high density using a warp and a weft, and the fabric is subjected to a relaxation treatment at a low temperature of 80 ° C or less. Method.