JP2015143407A - Double width high density woven fabric roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a woven fabric roll which a rolled shape is good even if the woven fabric is double width, and the quality near the woven fabric selvage is good.SOLUTION: As for a woven fabric roll, a woven fabric which is plain weave that the warp and weft consist of synthetic fiber multifilament yarn, for air bags, and appointed density. The width of the woven fabric roll is 2,000 mm or more. The roll hardness of the woven fabric roll in the center part is 70° or higher and 93° or lower. The difference of the maximum and minimum roll hardness of the end part of the woven fabric roll is 10° or less, and the difference of the roll diameter of the end part and the center part of the woven fabric roll is 1% or less.

Description

  The present invention relates to a roll wound with a high-density fabric. More particularly, the present invention relates to a high quality, wide, high density woven fabric roll suitable for airbags.

  In order to reduce the impact on the human body in a vehicle accident, the installation of airbags on vehicles such as automobiles has been progressing. In addition to driver and passenger airbags, side airbags, side airbags, and knees are used as airbags that inflate and absorb shock to the human body in the event of a collision. Air bags, inter-seat air bags, rear window curtain bags, rear seat belt airbags, and the like are being put into practical use. Furthermore, in order to protect pedestrians, various types of airbags such as airbags that are installed so as to be inflated outside the vehicle have been studied.

Because the airbag fabric is a safety part, the quality of the fabric that makes up the airbag is highly uniform so that the airbag can fully perform its functions in the event of an accident. It is required that there is no.
However, in recent years, the demand for air bag mounting has been increasing due to the arrival of automobile society in emerging countries, and it is important that the safety is ensured and the quality is stable at low cost.
2. Description of the Related Art Conventionally, airbags have been produced by a production method in which a plain woven fabric is sewn into a bag shape to produce an airbag, or a production method in which a bag is made into a bag weaving structure at the loom stage. Here, when weaving plain fabrics and bag fabrics, the fabrics should be free from defects, the density should not change in the width and longitudinal directions, and functionally the fabric should have uniform strength and air permeability everywhere. Is important in maintaining the quality of airbags as safety parts. In addition, being able to produce stably with few defects leads to a low-cost and high-quality airbag fabric.

  In particular, when weaving a high-density plain woven fabric such as an airbag fabric, the warp at the ears at both ends of the fabric is loosened, and the ears of the woven fabric are uneven, leading to wrinkles. Reducing the quality of the fabric. Or, in order to increase efficiency, there is a problem that the diameter of a woven roll obtained by winding a woven fabric for a long time cannot be increased, and improvement in quality and production has been demanded. Further, as the loom becomes wider, the unevenness of the fabric roll diameter makes it difficult to increase the diameter, and an immediate solution is desired.

  There has been proposed a technology that can be used to produce a high-quality fabric roll wound with a high-density airbag fabric. For example, Patent Document 1 below discloses the strength of a paper tube that winds a sheet. A method for improving the winding appearance by specifying is disclosed. Although this method works effectively, it cannot be fundamentally solved unless the fabric itself is wound well. Also, the following Patent Document 2 discloses a resin discharge amount according to the fabric roll diameter during winding. Has been disclosed, but it cannot be used in fabrics that have already been prepared with warps. Thus, the conventional method has not yet solved the problem.

JP-A-8-12196 Japanese Patent No. 3631636

  The problem to be solved by the present invention relates to a fabric roll wound with a high-density fabric, and provides a fabric roll that has a good winding shape even when the fabric becomes wide and also has a good quality near the fabric ear. is there.

As a result of intensive studies and experiments to solve the above problems, the present inventor made the hardness of the fabric roll in the vicinity of the ear portion of the high-density fabric a specific range, and the unevenness difference in the winding diameter of the fabric roll was also a specific range. As a result, it has been found that a fabric roll wound with a high-quality airbag fabric is obtained, and the present invention has been completed based on this finding.
That is, the present invention is as follows.

  [1] A fabric roll obtained by winding a fabric of a predetermined density for an airbag having a plain weave structure in which warps and wefts are made of synthetic fiber multifilament yarn around a winding core, the width of the fabric roll being 2000 mm or more and a winding diameter of 200 mm The winding hardness at the center of the fabric roll is 70 ° or more and 93 ° or less, the difference between the maximum value and the minimum value of the winding hardness at the end of the fabric roll is 10 ° or less, and the fabric The fabric roll according to claim 1, wherein a difference in winding diameter between an end portion and a central portion of the roll is within 1%.

  [2] The fabric roll according to [1], wherein the warps and wefts have a fineness of 210 to 750 dtex, and a cover factor of the fabric is within a range of 2000 to 2900.

  [3] The fabric roll according to [1] or [2], wherein the tuft length of the ear portion of the fabric is 2 to 15 mm.

[4] At least the following conditions:
(A) Warp tension during weaving is 0.20 cN / dtex to 0.45 cN / dtex; and (b) Winding tension when winding a fabric around a winding core is 0.5 N / cm to 1.5 N / cm. Is
The fabric roll according to any one of [1] to [3], which is manufactured by a manufacturing method including a lower weaving step.

  [5] The fabric roll according to any one of [1] to [4], wherein the winding core is a paper tube having a thickness of 8 mm or more, a length of 2060 mm or more, and a flat pressure resistance of 1000 N / 100 mm width or more.

  [6] The fabric roll according to any one of [1] to [5], wherein the warp and weft are at least one fiber selected from the group consisting of a polyamide-based continuous fiber and a polyester-based continuous fiber.

  [7] The warp and weft are composed of polyamide 6 continuous fiber, polyamide 66 continuous fiber, polyamide 46 continuous fiber, polyethylene terephthalate continuous fiber, polybutylene terephthalate continuous fiber, polytrimethylene terephthalate continuous fiber, and polyethylene naphthalate continuous fiber. The fabric roll according to [6], wherein the fabric roll is at least one fiber selected from the group.

  [8] An airbag using at least a part of the fabric wound around the fabric roll according to any one of [1] to [7].

  A fabric roll wound with a wide, high-density fabric for an airbag according to the present invention is a fabric roll wound with a fabric excellent in quality without wrinkles in the fabric width direction as compared with a fabric roll obtained by a conventional manufacturing method. It becomes a roll and exhibits uniform characteristics in the width direction even when used as a base fabric for an airbag. Moreover, since the unevenness | corrugation generation | occurrence | production of a fabric roll edge part is small, a large diameter winding is also attained.

It is the schematic of an example of the textile roll of this invention.

Hereinafter, the present invention will be described in detail.
The length of the fabric roll of the present invention is 2000 mm or more, and the winding diameter is 200 mm or more. Moreover, the winding hardness of the center part of a textile roll is 70 degrees-93 degrees, More preferably, they are 75 degrees-90 degrees, More preferably, they are 80 degrees-87 degrees. When the winding hardness is less than 70 °, the winding tension is low or the texture of the fabric is misaligned, wrinkles or density spots are generated on the fabric, and the quality as the fabric is poor. Become. Moreover, when winding hardness exceeds 93 degrees, it is a case where winding tension becomes high too much, tension | tensile_strength in the excessive warp direction is applied to a textile fabric, and possibility that textile characteristics, such as tensile strength, will fall will come out.

  Here, the “central portion” of the fabric roll refers to a width center point and a range within 20 cm from the center point toward both ends.

  Furthermore, the difference in hardness between the maximum value and the minimum value at the end of the fabric roll is 10 ° or less, and when it exceeds 10 °, wrinkle defects due to the hardness difference often occur in the fabric.

  Here, the “end portion” of the fabric roll refers to a range within 20 cm from each end toward the center portion.

  In the winding diameter of the fabric roll of the present invention, the difference in winding diameter between the central portion and the end portion is within 1%. When this difference exceeds 1%, the end portion protrudes from the center portion or is dented. Due to this difference in winding diameter, the fabric roll has a wrinkle defect, resulting in a poor quality fabric. End up.

  The fineness of the constituent yarn constituting the fabric used for the high-density fabric constituting the fabric roll of the present invention is preferably 210 to 750 dtex. When the fineness of the constituent yarn is 210 dtex or more, the mechanical properties that can withstand high-pressure deployment are satisfied. In addition, if the fineness of the constituent yarn is 750 dtex or less, the woven fabric is lightweight and has good storage properties, and contributes to initial restraint. More preferably, the total fineness of the constituent yarn is 230 to 550 dtex, and in a loom of a type in which wefts fly by the force of water or compressed air, such as a water jet loom or an air jet loom, it is particularly easy to cope with high speed. .

  The cover factor of the high-density fabric constituting the fabric roll of the present invention is √ (warp fineness (dtex) × warp density (line / 2.54 cm)) + √ (weft fineness (dtex) × weft density (line / 2.54 cm)), and preferably a value of 2000 to 2900. The lower limit is preferably 2100 or more, more preferably 2200 or more. The upper limit is more preferably 2500 or less, further preferably 2400 or less, and most preferably 2300 or less. When the cover factor is 2000 or more, the woven fabric not applied with the coating agent has low air permeability. When the cover factor is 2900 or less, the fabric does not become rigid but has flexibility. In addition, the density calculates the cover factor by measuring the warp density and the weft density at the center of the fabric.

  In the present specification, the “predetermined density fabric” refers to a high-density fabric having a cover factor of 2000 or more.

In the high-density fabric constituting the fabric roll of the present invention, the length of the tufted ear is 2 to 15 mm, preferably 3 to 10 mm, more preferably 4 to 7 mm. If the tufted ears are longer than 15mm, the tufted ears will be folded back and woven into the fabric, or between the fabric and the fabric while being wound on the fabric roll, and the ear height will be increased. The trouble which ends up occurs. In addition, when the tuft ear is shorter than 2 mm, the weft yarn is removed in the middle of the process, resulting in a defect that the fabric ear is not formed.
In order to set the length of the tufted ears to a predetermined length, make the warp tension appropriate to prevent the fabric ears during weaving from loosening or conversely, and use warp yarns for warps It is effective to do.

  The force yarn used in the present invention is a yarn used for reducing the looseness in the fabric ear by using the ear at the both ends of the warp. As the fineness of the force yarn to be used, a small fineness of 3 to 30% with respect to the warp fineness of the ground portion may be selected. The material may be nylon 66 fiber, nylon 6 fiber, polyester fiber or the like, but it is preferable to use the same material as the warp and weft from the viewpoint of recycling and the like.

  The number of force yarns is suitably 2 to 24, and the same number can be used at the left and right ends, but if the warp ears do not loosen, the left and right unequal numbers may be used. . Usually, it is 2-8 per one side, More preferably, it is 4-6. The force yarn may be a monofilament yarn or a multifilament yarn, but in the case of 33 dtex or less, the monofilament yarn is suitable in terms of strength. Furthermore, it may be a raw yarn, a yarn subjected to false twisting or crimping, a spun yarn, or a combination of these.

  In addition, the grounding yarn used at the time of weaving is tightened so that the fabric ears are not loosened at the left and right end portions of the fabric. Generally, two yarns are used on one side, It is organized into a woven fabric while gripping the weft yarns one by one, such as a Leno type in which the yarns are alternately switched left and right. In the Reno type, it is also effective to tighten the ear portion by using not only one set on one side but also several sets of Reno.

  When weaving the woven fabric of the present invention, the number of warps to be laid (number of warps per wing) is preferably 1 / wing, but may be 2 / wing. Further, it is possible to put two warps or force yarns only at the end of the fabric, or more than one, and it is also effective to reduce the looseness of the fabric ear by combining the number of cocoons.

  In the high-density fabric constituting the fabric roll of the present invention, the warp tension at the time of weaving is preferably 0.20 to 0.45 cN / dtex, more preferably 0.24 to 0.40 cN / dtex, still more preferably 0.00. 29-0.36 cN / dtex. When the warp tension is lower than 0.20 cN / dtex, the ears of the warp tend to become loose when weaving a high-density fabric, but the looseness cannot be fully extended, and when weaving, the loom stops such as the weft warp hook It is easy for an event that causes the problem to occur. On the other hand, when the warp tension exceeds 0.45 cN / dtex, the force applied to the warp is too large and fluff is likely to occur, and the weaving property and the fabric quality are deteriorated.

  Moreover, 0.5-1.5N / 10mm is preferable, as for the tension | tensile_strength when winding the textile roll of this invention around a winding core, More preferably, it is 0.7-1.2N / 10mm, More preferably, it is 0.8-1. 0.0 N / 10 mm. When the winding tension is lower than 0.5 N / 10 mm, the winding hardness of the fabric becomes small, and wrinkle defects are likely to occur during the subsequent steps. In addition, when the winding tension exceeds 1.5 N / 10 mm, the force applied to the fabric is too large, causing problems such as changes in fabric characteristics and irregularities in the fabric.

  When the high-density fabric constituting the fabric roll of the present invention is wound on a loom, a direct winding method may be used on the loom, or a separate winding device may be used. When a separate winding device is used, the fabric may be wound around a paper tube or the like by performing ear shifting in order to prevent the height of the ear. Ear-shifting means winding the fabric around a paper tube, etc. while shifting the fabric by several millimeters so that the fabric ears do not overlap at the same position. It is also possible to adapt at the time of winding up.

  The paper tube wound with the high-density fabric constituting the fabric roll of the present invention preferably has a length of 2060 mm or more, a thickness of 8 mm or more, and a flat pressure resistance of 1000 N / 100 mm or more (moisture content of 10% or less). In addition to the paper tube, the winding may be made of plastic or metal.

  In the high density fabric wound around the fabric roll in the present invention, the content of the oil component is preferably 0.01 to 2.0% by weight, more preferably 0.05 to 1.5% by weight, and still more preferably. 0.1 to 0.7% by weight. The oil agent component referred to here is extracted from the fabric with the organic solvent hexane, and is the percentage of the weight of the extract with respect to the weight of the fabric. If the content of the oil component is 0.01% by weight or more, the tear strength of the fabric can be maintained and improved. Especially in polyamide fabrics, the surfactant component helps bleed out the cyclic unimers of the polyamide fibers, and the cyclic unimers and the oil component on the surface of the polyamide fibers integrally promote the sliding between the fibers, and the tensile strength Contributes to maintaining and improving tear strength. That is, since an improvement in gas pressure resistance when deployed as an airbag fabric can be expected, it contributes to prevention of bursts during deployment. On the other hand, if the content of the oil component in the fabric is 2.0% by weight or less, the content can be controlled from the applied amount and the scouring removal amount, and the drawing resistance of the woven yarn in the fabric can be appropriately maintained. . Moreover, it can control so that it may not become an oil agent component of excess content so that a textile fabric may pass in a flammability test (FMVSS302). These oil agent components may be derived from the process oil agent applied in the fiber manufacturing process and the weaving process.

The high-density fabric constituting the fabric roll of the present invention can be used for an airbag without being coated with a resin or an elastomer. Further, the woven fabric may be calendered, but care must be taken not to cause a decrease in tear strength, and it is preferable to use the fabric without calendering. Furthermore, the airbag fabric of the present invention may be used for an airbag after being coated with a resin or an elastomer. In particular, a lightweight coating having a coating amount of about 5 to 35 g / m ² is preferable for a plain fabric, and non-breathability can be obtained by the lightweight coating, and a lightweight coating having a coating amount of about 15 to 35 g / m ^{2 for} a bag fabric. Is preferred. When the coating is applied, the air permeability becomes extremely low. However, by using the woven fabric and the weaving method before coating of the present invention, there is no wrinkle defect at the time of coating, the width fluctuation is small, and it is good. Airbag fabrics can be produced.

  The warp and the weft of the high-density fabric constituting the fabric roll of the present invention are made of synthetic fibers. The synthetic fiber is preferably a polyamide-based or polyester-based long fiber (continuous fiber). The warp and weft are selected from the group consisting of polyamide 6 continuous fiber, polyamide 66 continuous fiber, polyamide 46 continuous fiber, polyethylene terephthalate continuous fiber, polybutylene terephthalate continuous fiber, polytrimethylene terephthalate continuous fiber, and polyethylene naphthalate continuous fiber. Can be at least one type of fiber. Particularly preferred are polyamide-based long fibers, such as polyamide 6, polyamide 6 and 6 (polyamide 66), polyamide 11, polyamide 12, polyamide 6 and 10, polyamide 6 and 12, and polyamide 4 and 6 (polyamide 46). Examples thereof include fibers made of a polymer and a mixture thereof. Among these, it is preferable that the polyamide 6/6 fiber is mainly composed of polyhexamethylene adipamide fiber. The polyhexamethylene adipamide fiber refers to a polyamide fiber having a melting point of 250 ° C. or higher composed of 100% hexamethylenediamine and adipic acid. Polyamide long fibers used in the present invention are copolymerized with polyhexamethylene adipamide with polyamide 6, polyamide 6 · I, polyamide 6 · 10, polyamide 6 · T, etc. within a range where the melting point is not less than 250 ° C., Or the fiber which consists of a blended polymer may be sufficient.

  The yarn constituting the woven fabric preferably has a tensile strength of 9.8 to 11.5 cN / dtex. The higher the tensile strength is 9.8 cN / dtex or higher, the higher the tensile strength of the fabric. From the viewpoint of obtaining stable quality suitable for weaving, the upper limit of the tensile strength of the constituent yarn is 11.5 cN / dtex.

  From the relationship of thermal shrinkage in the process of weaving, the boiling water shrinkage of the raw yarn is preferably 5 to 12%. If the boiling water shrinkage ratio of the raw yarn is 5% or more, the tension treatment is performed at the time of the heat shrinking process, thereby suppressing the woven yarn crimp and contributing to the suppression of the specific load elongation of the fabric. If the boiling water shrinkage is too low, the yarn crimp at the time of weaving is reflected in the fabric as it is, so that the specific load elongation of the fabric cannot be suppressed. The upper limit of the substantial boiling water shrinkage of the raw yarn is 12%.

  In addition, as long as the effect of the present invention is not impaired, the fiber may contain various additives that are usually used for improving the productivity or characteristics in the production process and processing process of the raw yarn. For example, a raw yarn containing a heat stabilizer, an antioxidant, a light stabilizer, a smoothing agent, an antistatic agent, a plasticizer, a thickener, a pigment, a flame retardant, and the like can be used as the weaving yarn.

  In the weaving of the present invention, an oil agent component or a wax component for improving the converging property or smoothness may be added to the warp yarn or the like at the stage of warp preparation or on the loom. The oil agent and WAX component provided here may finally be contained in the airbag fabric. Further, sizing may be applied to prevent generation of fluff and warp breakage during weaving. However, it is preferable to wind up the warp beam with non-sizing, non-oil, non-wax without adding any agent to the raw yarn.

  In the weaving of the fabric of the present invention, the loom used is a water jet loom, an air jet loom, a rapier loom, a multiphase loom, or the like, and a fabric can be produced using these. In the case of weaving a plain fabric, a water jet loom is particularly preferable from the viewpoint of speeding up, widening, or machine price. The weft supply system of the loom may be a single nozzle type or a plurality of nozzles, but a multiple nozzle type such as two nozzles is preferable in order to reduce the dimensional difference in the fabric width direction at the place of the weft cheese.

  The fabric structure of the present invention is a plain weave structure because it is particularly excellent in mechanical properties and is thin. However, as a fabric structure, a twill weave other than a plain weave, a satin weave, a change woven fabric, a mixed fabric, a multiaxial weave, or the like can be used depending on circumstances.

  The woven fabric can be scoured and washed to remove excess oil component and dirt. In the scouring step, alkali cleaning and surfactant cleaning are performed in a warm water bath, but rather, the woven fabric may be finished without scouring. In the water jet loom, the oil component generally drops off, and the woven fabric with a proper amount of oil component adhesion can be finished into a woven fabric without scouring, making it easy to control the amount of the content necessary for the present invention, even economically. is there. Finally, it is preferable that a warping oil or a weaving process oil mainly composed of a smoothing agent and an antistatic agent is contained in the woven fabric as an oil component. In the scouring process, an appropriate scouring temperature and scouring time may be selected. Or the raw machine woven in the water jet loom does not need to carry out scouring.

  Subsequently, the fabric can be dried through a high-temperature tank or a heat cylinder, and further heat-fixed to be finished into an airbag fabric. Here, it may be completed only by drying, or may be heat-set after drying. In the drying and heat setting of the woven fabric, it is preferable to control the shrinkage and the tension with respect to the width of the woven fabric and the feeding in the warp direction. For example, a tenter dryer is used. In order to keep the specific load elongation in the tensile test of the fabric, it is preferable to select the temperature of the heat treatment, and to process while applying tension without depending on shrinkage during the heat treatment. Furthermore, it is preferable to perform rapid cooling while applying tension after the heat treatment.

  The variation in the width direction of the air permeability of the high-density fabric constituting the fabric roll of the present invention is preferably small, and the variation in the width direction of the air permeability is small. The shock absorption of the head and the head can be changed, and the possibility of a safety risk can be suppressed.

The high-density fabric constituting the fabric roll of the present invention is cut and sewn, and the driver seat airbag, the passenger seat airbag, the rear seat airbag, the side airbag, the knee airbag, and the car seat It can be used as appropriate for airbags, side curtain curtains, rear window curtain bags, pedestrian protection airbags, and the like. In these airbags, the reinforcing fabric used for the inflator attachment port, the vent hole portion, or the like or the member that regulates the bag deployment shape can be the same fabric as the airbag fabric. Further, in the sewing of the airbag, one or a plurality of such airbag fabrics formed by punching, fusing, and cutting can be used to sew the peripheral portion to form the airbag. An airbag in which the peripheral portion is sewn can be formed by single or double sewing.
The airbag module can be made by combining an airbag obtained by cutting and sewing the above-described airbag fabric and an inflator using explosives or propellant.

Hereinafter, the present invention will be specifically described with reference to Examples and Reference Examples.
About the characteristic evaluation of the fabric roll in an Example and a reference example, it implemented by the following method.
(1) Fineness: Determined according to JIS-L1013: 2010, 8.3.1 positive fineness.

(2) Woven density: Determined according to JIS-L1096: 2010, Annex 11-A.
The measurement points of weaving density (warp density and weft density) are two points in the width direction, two points 20 cm inside from each end, one point at the center of the width, and two intermediate points between the center point of the width and each point 20 cm inside. The average value of a total of 5 places was used.
Moreover, the center of the warp density of the woven fabric is an average value of the measured values at the five central portions of the woven fabric, and the end portions are measured at two points 20 cm inside from both ends in the width direction. The average value was used.

(3) Winding hardness: The hardness of the fabric roll was determined using an Asker rubber hardness meter C type (Polymer Keiki Co., Ltd.). The measurement was performed at four locations in the circumferential direction, and the operation was performed three times. The average value of a total of 12 data was used.

(4) Quality of the fabric ear part: The state where the outermost ground yarn or force yarn of the fabric is organized and the loose state of the ear part were classified. Weaving was performed by placing the weaving on an inspection table.
The quality of the fabric ears was judged by an average of five grades by five engineers who have been involved in airbag operations for more than three years.
In the grading, the warp and weft are well organized in the ears of the fabric, grade 5 when wrinkles and looseness (flares) cannot be seen, grade 4 when small thin wrinkles and looseness appear slight, and wrinkles. The condition where the looseness was slightly visible was rated on the third grade, the condition with slightly strong wrinkles and looseness on the second grade, and the condition where strong wrinkles and looseness seemed strong on the first grade.

(6) Winding diameter, winding diameter difference:
The roll diameter is obtained by calculating the roll circumference from the length using a thread or string. Measure the circumference of the center and the circumference of the recesses and protrusions at the end, The ratio (absolute value) obtained by dividing the difference by the circumference of the central portion using the circumference of the end having the larger winding diameter difference from the circumference of the portion was taken as the winding diameter difference.

[Example 1]
A fiber having a strength of 8 cN / dtex obtained by melt spinning and hot drawing of polyhexamethylene adipamide resin was used as the warp and weft of the fabric. This fiber had a fineness of 470 dtex, 136 single yarns, a boiling water shrinkage of 7.0%, and the number of entanglements in the water immersion method was 10 / m. The warp was warped with no twist and no glue to produce a warp beam with 4428 warps. The number of force yarns at the ears was 4 on one side, 8 on both sides, the fineness of the force yarns was all 22 dtex, and the fineness of the ground fault yarn was 22 dtex. Further, the number of warp tubs (number of warps per cocoon wing) was set to 1 / wing.
The weaving machine was a water jet weaving machine, the warp tension was set to 0.32 cN / dtex, the weaving machine rotation speed was 700 rpm, and the weft was weaved using the same thread as the warp. Also, the fabric shifting mechanism during winding is not working. The tuft length of the fabric at this time was set to 5 mm.

Subsequently, the obtained raw machine was washed with water, continuously passed through a drying cylinder, and further subjected to a heat calendar. The heat calendering conditions were a metal roll temperature of 160 ° C. and a pressure of 490 N / cm. In the calender roll, the upper metal roll for heating was 12 cm in diameter, the lower roll was 24 cm in diameter having a paper surface, and the surface speed was the same as the top and bottom.
Further, the fabric was wound by a sheet inspection machine with a winding tension of 1.0 N / cm on a paper tube having a length of 2250 mm, a thickness of 8 mm, and a pressure strength of 1000 N / 100 mm, and a fabric roll having a length of 1000 m was produced. .
The evaluation results of the obtained fabric roll are shown in Table 1 below. The winding hardness of the fabric roll is 83 ° at the center, the difference in winding hardness at the end is 3 °, the surface roughness of the fabric roll is 0.3%, and the state of the fabric when the fabric roll is unwound, the fabric ear The quality of the part was also good.

[Example 2]
The same procedure as in Example 1 was performed except that the warp tension during weaving was 0.21 cN / dtex and the winding tension around the paper tube in the subsequent process was 0.7 N / cm.
The evaluation results of the obtained fabric roll are shown in Table 1 below. The tuft length of the woven fabric is 4 mm, the winding hardness of the woven fabric is 78 ° at the center, the difference in winding hardness at the end is 5 °, the surface roughness of the woven roll is 0.4%, and the woven roll The condition of the fabric at the time of unwinding and the quality of the fabric ear were also good.

[Example 3]
The same conditions as in Example 1 were used except that the warp and weft fineness used was 700 dtex, the single yarn was 105, the warp beam was 3600 warps, and the warp tension during weaving was 0.38 cN / dtext. Carried out.
The evaluation results of the obtained fabric roll are shown in Table 1 below. The tuft length of the woven fabric is 5 mm, the winding hardness of the woven fabric is 82 ° at the center, the difference in winding hardness at the end is 4 °, the surface irregularity of the fabric roll is 0.7%, and the fabric roll The condition of the fabric at the time of unwinding and the quality of the fabric ear were also good.

[Example 4]
A water jet loom is manufactured using polyethylene terephthalate fiber with a fineness of 550 dtex, a single yarn of 240, a boiling water shrinkage of 2.2%, and a number of entanglements of 10 / m and a warp beam of 4290 warps. , The warp tension is 0.32 cN / dtex, the fineness of the force yarn is 22 dtex on one side, 12 on both sides, 22 dtex on the ground fault, the loom speed is 600 rpm, and the weft is the same fiber as the warp Was used for weaving. The raw machine was processed in the same manner as in Example 1. The tuft length of the fabric at this time was set to 8 mm.
The evaluation results of the obtained fabric roll are shown in Table 1 below. The winding hardness of the fabric is 85 ° at the center, the difference in winding hardness at the end is 8 °, the surface roughness of the fabric roll is 0.6%, and the state of the fabric when the fabric roll is unwound, the fabric ear The quality was also good.

[Comparative Example 1]
A fabric roll was produced under the same conditions as in Example 1 except that the warp tension during weaving was 0.46 cN / dtext and the winding tension of the fabric onto the paper tube was 1.8 N / cm.
The evaluation results of the obtained fabric roll are shown in Table 1 below. The tuft length of the fabric is 6 mm, the winding hardness of the fabric is 90 ° at the center, the difference in winding hardness at the end is 7 °, the surface roughness of the fabric roll is 1.1%, and the fabric roll The state of the fabric at the time of unwinding was a state where wrinkle defects occurred.

[Comparative Example 2]
A fabric roll was produced under the same conditions as in Example 1 except that the winding tension of the fabric on the paper tube was 0.3 N / cm.
The evaluation results of the obtained fabric roll are shown in Table 1 below. The tuft length of the fabric is 5 mm, the winding hardness of the fabric is 69 ° at the center, the difference in winding hardness at the end is 11 °, and the unevenness of the surface of the fabric roll is 1.5%. Moreover, the state of the fabric when the fabric roll was unwound was a state in which wrinkle defects occurred.

[Comparative Example 3]
A fabric roll was produced under the same conditions as in Example 1 except that the winding tension of the fabric onto the paper tube was 1.8 N / cm, and the paper tube was 8 mm thick and used with a pressure strength of 800 N / cm. .
The evaluation results of the obtained fabric roll are shown in Table 1 below. The tuft length of the fabric is 5 mm, the winding hardness of the fabric is 88 ° at the center, the difference in winding hardness at the end is 11 °, and the surface roughness of the fabric roll is 1.0%. The state of the woven fabric at the time of unwinding was a state in which wrinkle defects occurred, and the paper tube was also wrinkled (buckled) along the axis.

[Comparative Example 4]
A fabric roll was produced under the same conditions as in Example 1 except that the number of warp yarns was 3,700, the cover factor was 1927, and the force yarn of the fabric ear on the loom was not used.
The evaluation results of the obtained fabric roll are shown in Table 1 below. The tuft length of the fabric is 5 mm, the winding hardness of the fabric is 78 ° at the center, the difference in winding hardness at the end is 4 °, and the surface roughness of the fabric roll is 1.2%. When the roll was unwound, the fabric had wrinkles and curved wefts. Moreover, the quality of the fabric ear was slightly wrinkled.

[Comparative Example 5]
A fabric roll was prepared under the same conditions as in Example 1 except that the length of the fabric ear (on the opposite nozzle side) was 16 mm.
The evaluation results of the obtained fabric roll are shown in Table 1 below. The tufted ears turned back to the fabric side, and the diameter of the ends became large. The winding hardness of the fabric is 88 ° at the center, the difference in winding hardness at the end is 8 °, and the surface roughness of the fabric roll is 1.6%. And the quality of the fabric ear was poor.

  The present invention relates to a fabric roll wound with a fabric, and is particularly suitable for use as a fabric roll wound with a wide, high-density fabric for an air bag for occupant safety by absorbing shock in a vehicle collision accident. is there.

Claims (8)

  A fabric roll in which a fabric having a predetermined density for a plain weave air bag, in which warps and wefts are made of synthetic fiber multifilament yarn, is wound around a winding core, and the width of the fabric roll is 2000 mm or more and the winding diameter is 200 mm or more. The winding hardness of the central portion of the fabric roll is 70 ° or more and 93 ° or less, the difference between the maximum value and the minimum value of the winding hardness of the end portion of the fabric roll is 10 ° or less, and the end of the fabric roll The woven roll according to claim 1, wherein a difference in winding diameter between the central portion and the central portion is within 1%.   The fabric roll according to claim 1, wherein the fineness of the warp and weft is 210 to 750 dtex, and the cover factor of the fabric is in the range of 2000 to 2900.   The fabric roll according to claim 1 or 2, wherein a tuft length of the ear portion of the fabric is 2 to 15 mm. At least the following conditions:
(A) Warp tension during weaving is 0.20 cN / dtex to 0.45 cN / dtex; and (b) Winding tension when winding a fabric around a winding core is 0.5 N / cm to 1.5 N / cm. Is
The textile roll according to any one of claims 1 to 3, which is produced by a production method including a lower weaving step.   The fabric roll according to any one of claims 1 to 4, wherein the winding core is a paper tube having a thickness of 8 mm or more, a length of 2060 mm or more, and a flat pressure resistance of 1000 N / 100 mm width or more.   The fabric roll according to any one of claims 1 to 5, wherein the warp and the weft are at least one fiber selected from the group consisting of a polyamide-based continuous fiber and a polyester-based continuous fiber.   The warp and weft are selected from the group consisting of polyamide 6 continuous fiber, polyamide 66 continuous fiber, polyamide 46 continuous fiber, polyethylene terephthalate continuous fiber, polybutylene terephthalate continuous fiber, polytrimethylene terephthalate continuous fiber, and polyethylene naphthalate continuous fiber. The woven roll according to claim 6, which is at least one kind of fiber.   The airbag which used the textile fabric wound by the textile roll of any one of Claims 1-7 for at least one part.

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