JPWO2006088163A1 - Belt-like woven structure and method for producing the same - Google Patents

Abstract

A belt-shaped woven fabric woven using a non-heat-sealable synthetic fiber and a heat-sealable synthetic fiber having a softening point lower than that of the non-heat-sealable synthetic fiber by 30 ° C. or more on the fiber surface. The heat-fusable synthetic fiber is used for at least a part of the wefts constituting the woven structure, and is heat-treated at a temperature equal to or higher than the softening point temperature of the heat-fusion component. The fusible synthetic fibers or the heat fusible synthetic fiber and the non-heat fusible synthetic fiber are fused and fixed to each other. According to this fabric structure, it is possible to efficiently produce a belt-like fabric structure such as a webbing for a seatbelt that is flexible and easy to handle while maintaining rigidity in the weft direction over a long period of time even after repeated use. it can.

Description

  The present invention relates to a belt-like woven fabric structure that is flexible, difficult to twist, and excellent in productivity.

  Conventionally, belt-shaped woven structures having a predetermined width according to the purpose have been used for belt straps attached to clothes, bags, etc., medical traction belts, back pain belts, seat belts, transport belts, and the like. . Such a strip-shaped woven structure is required to have a certain strength and flexibility, and a property of not twisting in the width direction, depending on the application. In addition, when used as a seat belt webbing, it is particularly required to have comfort when worn, ease of storage and removal into a retractor, and the like.

  Therefore, in order to meet these demands, many proposals have been made particularly on seat belt webbing. For example, by using monofilaments as the wefts that make up the seat belt webbing, the rigidity of the seat belt webbing in the weft direction (width direction) is improved, and twisting of the webbing during pull-out or roll-in by the slip guide is prevented. However, it has been proposed to improve the retractability of the retractor (see Patent Documents 1 to 3).

In addition, wefted two types of multifilament yarns with different single yarn fineness are used as wefts to improve the stiffness in the weft direction (see Patent Document 4), and wefts are thermosetting resins. Has been proposed (see Patent Document 5).
US Pat. No. 4,107,371 JP 2000-190812 A JP 2003-41431 A JP 2000-264162 A Japanese Patent Laid-Open No. 55-116831

  However, most of the seatbelt webbings described in Patent Documents 1 to 3 are woven by a needle loom, and two wefts are driven simultaneously in a bent state. However, since monofilaments have high rigidity and poor flexibility, when the monofilament is driven as a weft, yarn breakage tends to occur when the monofilament is bent at the end surface of the webbing, so weaving is frequently interrupted and production efficiency is increased. There is a problem that is bad. Further, even if the yarn is not broken, the monofilament slightly protrudes from the end surface of the webbing ear part. Therefore, there is also a problem that the wearing feeling is poor when it is worn as a seat belt.

  Moreover, although the thing of patent document 4 mixes and uses the multifilament with a large single yarn fineness and the multifilament with a small single yarn fineness, it is difficult to perform the said mixed fiber uniformly and a process is complicated. There is a problem that productivity is inferior. Therefore, it is conceivable to improve the productivity by reducing the single yarn fineness. However, the effect of increasing the stiffness in the weft direction becomes insufficient with a multifilament having a reduced single yarn fineness. And the thing of the said patent document 5 has a problem that the rigidity of a weft direction falls rapidly with time, since a thermosetting resin peels and drops | omits while using webbing.

  The present invention has been made in view of such circumstances. Even when used repeatedly, a belt-like woven structure such as a webbing for a seatbelt that is flexible and easy to handle while maintaining rigidity in the weft direction over a long period of time and being difficult to twist. The purpose is to provide a technology that enables efficient production.

  In order to achieve the above object, the present invention provides a heat-fusible synthetic fiber and a heat-fusible component comprising a heat-fusible component having a softening point lower by 30 ° C. or more than the non-heat-fusible synthetic fiber on the fiber surface. A belt-shaped woven structure woven using synthetic fibers, wherein the heat-fusible synthetic fiber is used for at least a part of the wefts constituting the woven structure, and the heat-fusible component is softened. The first woven fabric structure in which the heat-fusable synthetic fibers or the heat-fusible synthetic fibers and the non-heat-fusible synthetic fibers are fused and fixed to each other by heat treatment at a point temperature or higher is provided. The gist.

  In addition, the present invention provides, in particular, a belt-like woven fabric structure in which the heat-fusible component of the heat-fusible synthetic fiber is contained in an amount of 5% by weight or more based on the total amount of weft of the belt-shaped woven fabric structure. The third aspect is a belt-like woven fabric structure in which the heat-fusible component of the heat-fusible synthetic fiber is exposed to 15% or more on the fiber surface, and the weft of the belt-shaped woven fabric structure is 500 to A belt-like woven fabric structure made of polyester multifilaments of 3000 dtex and having a softening point of the heat fusion component of 120 to 220 ° C. is a fourth gist.

  Furthermore, the present invention provides a core-sheath type polyether multi-layer, in which the heat-fusible synthetic fiber is a core-sheath type polyester multi-component having a copolymer polyester mainly composed of polyethylene terephthalate as a sheath component and a homopolyester as a core component. A strip-shaped woven fabric structure in which the non-heat-sealable synthetic fiber is a homopolyester multifilament is a fifth gist, and the heat-sealable synthetic fiber is a polyethylene terephthalate copolymer obtained by copolymerizing the third component. A belt-like woven fabric structure made of a polymer, which is a polyester multifilament having a softening point of 200 ° C. or less and a hot water shrinkage (BWS) of 10 to 40%, is a sixth gist, It consists of a polyethylene terephthalate copolymer copolymerized with the third component, with a softening point of 200 ° C. or less and a maximum heat shrinkage stress of 0.1 to 1.0 c. / Cloth strip structure is a polyester multifilament dtex to be seventh gist of the. The heat-fusible synthetic fiber is made of a polyethylene terephthalate copolymer copolymerized with a third component, and has a softening point of 200 ° C. or less and a dry heat shrinkage stress of 0.1 to 1.0 cN / dtex. A strip-shaped woven fabric structure that is a multifilament is defined as an eighth aspect.

  The ninth aspect of the present invention is, in particular, a belt-like woven structure in which the belt-like woven structure is woven using a needle loom.

  And this invention is the method of manufacturing the said strip | belt-shaped woven fabric structure, Comprising: As for the polyester multifilament of 250-1500 dtex which is a heat-fusible synthetic fiber, weaving at least one part of a weft using a needle loom. The manufacturing method of the strip-shaped woven fabric structure is a tenth summary, and the manufacturing method of the strip-shaped woven fabric structure in which the single-fiber fineness of the heat-fusible synthetic fiber is 3 to 25 dtex is the eleventh summary.

  That is, in the belt-like woven fabric structure of the present invention, heat-fusible synthetic fibers are used for at least a part of the weft, and the heat-fusible synthetic fibers or the heat-fusible synthetic fibers are not bonded to each other by heat treatment. The heat-fusible synthetic fiber is fused and fixed, and does not shift in the direction of the past. Therefore, this is difficult to twist in the weft direction (width direction) and is easy to use. In addition, the fabric structure is prevented from twisting by fusing and fixing the fibers, and it is not necessary to increase the rigidity of the heat-fusible synthetic fiber itself, so it is relatively flexible and used as a seat belt webbing. In some cases, an excellent wearing feeling can be obtained. In addition, handling when winding and pulling out becomes smooth, and it is easy to use. In addition, since the multifilament having excellent flexibility can be used as the heat-fusible synthetic fiber, there is no problem even if it is driven at a high speed when weaving it as a weft with a needle loom, and it has the advantage of high productivity. Have

  Among the belt-like woven fabric structures of the present invention, in particular, those in which the heat-fusible component of the heat-fusible synthetic fiber is contained in an amount of 5% by weight or more with respect to the total amount of the wefts of the belt-like woven fabric structure, The fusion fixing between the two is sufficiently formed, and an excellent anti-twisting effect can be obtained.

  In particular, the heat-fusible component of the above heat-fusible synthetic fiber, in which 15% or more of the heat-fusible synthetic fiber is exposed on the fiber surface, is sufficiently formed by fusion-bonding of the fibers, and has an excellent twisting prevention effect. Can be obtained.

  In particular, the weft of the belt-like woven fabric structure is made of a polyester multifilament of 500 to 3000 dtex, and the softening point of the heat fusion component is 120 to 220 ° C., particularly excellent twist prevention effect and flexibility. Obtainable.

In particular, the heat-fusible synthetic fiber is a core-sheath type polyether multifilament having a copolymer polyester mainly composed of polyethylene terephthalate as a sheath component and a homopolyester as a core component. The synthetic synthetic fiber is a homopolyester multifilament, and the heat-fusible synthetic fiber is made of a polyethylene terephthalate copolymer copolymerized with a third component, and has a softening point of 200 ° C. or less, a hot water shrinkage (BWS). ) Is a polyester multifilament of 10 to 40%, or the above heat-fusible synthetic fiber is made of a polyethylene terephthalate copolymer copolymerized with a third component, and has a softening point of 200 ° C. or less and a maximum heat shrinkage stress. Is a polyester multifilament of 0.1 to 1.0 cN / dtex, which has even better twist It can be obtained and stop effect and flexibility.
The heat-fusible synthetic fiber is made of a polyethylene terephthalate copolymer copolymerized with a third component, and has a softening point of 200 ° C. or less and a dry heat shrinkage stress of 0.1 to 1.0 cN / dtex. What is a multifilament can obtain the more excellent twist prevention effect and softness | flexibility.

  In particular, when the belt-like woven structure is woven using a needle loom, it has excellent productivity as compared to a conventional webbing for seat belts to which an effect of preventing twisting is added.

  Further, in the present invention, according to the method for producing a belt-shaped woven fabric structure using a needle loom and weaving a polyester multifilament of 250 to 1500 dtex, which is a heat-fusible synthetic fiber, in at least a part of the weft, it is particularly excellent. The belt-like woven fabric structure can be manufactured with high productivity.

  Furthermore, in particular, according to the method for producing a belt-shaped woven fabric structure in which the single-fiber fineness of the heat-fusible synthetic fiber is 3 to 25 dtex, the belt-shaped woven fabric structure can be produced with even better productivity. .

(A)-(l) has shown the example of the cross-sectional shape of the heat-fusible multifilament which can be used for this invention.

  Next, the best mode for carrying out the present invention will be described.

  First, the belt-like woven fabric structure of the present invention comprises a heat-fusible synthetic fiber including a non-heat-fusible synthetic fiber and a heat-fusible component having a softening point lower than that of the non-heat-fusible synthetic fiber by 30 ° C. or more on the fiber surface. A belt-like woven fabric structure woven using fibers, and the heat-fusible synthetic fiber is used for at least a part of the wefts constituting the woven fabric structure.

  The non-heat-bondable synthetic fiber is a main component constituting the belt-like woven fabric structure, and an appropriate synthetic fiber can be used depending on the purpose. Usually, polyester fiber, polyamide fiber, polyolefin fiber, etc. are mentioned, and polyester fiber is preferred from the viewpoint of weather resistance such as weather fastness and weather resistance and dimensional stability. Among these, those made of homopolyester are particularly suitable.

  And when using a polyester multifilament as said non-heat-sealable synthetic fiber, it is preferable that the breaking strength is about 6.0-10 cN / dtex and elongation is about 10-30%. The above breaking strength and elongation are measured according to JIS L-1013 using an AGS-1KNG autograph tensile tester manufactured by Shimadzu Corporation under the conditions of a sample length of 20 cm and a low-speed tensile speed of 20 cm / min. Obtainable.

  Examples of the resin component of the polyester multifilament include polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate. Especially, the homopolyester multifilament which consists of a polyethylene terephthalate is suitable from the balance of cost and a mechanical physical property.

  The heat-fusible synthetic fiber used together with the non-heat-fusible synthetic fiber includes a heat-fusible component having a softening point lower by 30 ° C. or more than the softening point of the non-heat-fusible synthetic fiber on the fiber surface. Must be a thing.

  Here, the “softening point” refers to the temperature at which the resin constituting the synthetic fiber begins to soften. Specifically, the “softening temperature test method by thermomechanical analysis of thermoplastic film and sheet” of JIS K7196 method. The softening point measured according to

  That is, since the softening point of the non-heat-fusible synthetic fiber and the softening point of the heat-fusible component of the heat-fusible synthetic fiber have a difference of 30 ° C. or more, the woven structure woven using both is heat-treated. By doing so, the heat-fusable synthetic fibers or the heat-fusible synthetic fibers and the non-heat-fusible synthetic fibers are fused and fixed to each other, and the fibers are not easily displaced at the intersections and contact points. Is prevented from occurring. This is a major feature of the present invention.

  Note that the above-mentioned “fusion fixing” does not necessarily require that the heat-fusion component melts into a liquid state to fix the partner like an adhesive, and the contact area with the partner fiber increases due to the softening of the surface. However, it is only necessary to be in a fixed state so that they do not deviate from each other at intersections and contact points.

  In view of the above, the softening point of the heat fusion component is preferably 120 to 220 ° C, and particularly preferably 150 to 200 ° C. And more preferably, it is 160-190 degreeC. That is, if the softening point is less than 120 ° C., it may be difficult to spin and produce the heat-fusible synthetic fiber, and the resin component of the heat-fusible synthetic fiber may be worn away and the weft direction over time. This is because there is a possibility that the rigidity of the steel may decrease. In addition, when the softening point exceeds 220 ° C., the temperature necessary for heat setting after weaving approaches the melting point of the heat fusion component. The required required strength may not be obtained, and if the heat setting temperature is set lower than the appropriate temperature, sufficient fusion fixing between the fibers may not be performed, and the effect of preventing the twist in the weft direction may not be obtained. Because there is.

  The heat fusion component of the heat-fusible synthetic fiber is preferably made of the same type of resin as the non-heat-fusible synthetic fiber. A non-heat-sealable synthetic fiber is preferably formed of a homopolymer, the heat-seal component is a copolymer of the same polymer, and the softening point is lowered by 30 ° C. or more.

  For example, when the non-heat-sealable synthetic fiber is a polyester multifilament, examples of the heat-seal component include polyesters such as polybutylene terephthalate, polytetramethylene terephthalate, and polyethylene terephthalate, and copolymers thereof. Further, when the non-heat-sealable synthetic fiber is a polyamide multifilament, examples of the heat-seal component include polyamides such as 6 nylon, 12 nylon, and 66 nylon, and copolymers thereof.

  Among these, a combination of polyester resins is preferable from the viewpoint of weather resistance and dimensional stability. In particular, a homopolyester is preferable as the non-heat-sealable synthetic fiber, and a copolyester is preferable as the heat-seal component.

  As the preferred copolyester as the heat fusion component, terephthalic acid and ethylene glycol are the main components, and the copolymer component is an aliphatic component such as oxalic acid, malonic acid, azelaic acid, adipic acid, or sebacic acid as acid components. Aromatic dicarboxylic acids such as dicarboxylic acid, phthalic acid, isophthalic acid, naphthalene dicarboxylic acid and / or alicyclic dicarboxylic acids such as hexahydroterephthalic acid and diethyl glycol, polyethylene glycol, propylene glycol, hexanediol, paraxylene glycol, bis Contains one or a combination of two or more aliphatic, alicyclic or aromatic diol glycols such as hydroxyethoxyphenylpropane, and oxyacids such as parahydroxybenzoic acid as desired 50 mol% or less Copolymerized ester was added at a rate of is preferred.

  Of these, polyesters obtained by copolymerizing terephthalic acid and ethylene glycol with addition of isophthalic acid and hexanediol are particularly preferable. And in such isophthalic acid copolymerized polyester, what made 10-30 mol% copolymerization of the isophthalic acid component is preferable from the point of the ease of melt | fusion fixing, and the weaving property. In addition, it can adjust so that it may become a desired softening point by changing the copolymerization ratio of the said component monomer.

  The heat fusion component may be present in any form on the fiber surface of the heat-fusible synthetic fiber of the present invention, but the exposure ratio from the fiber surface is preferably 15% or more. It is. That is, if the heat fusion component is exposed to 15% or more on the fiber surface, the rate at which the intersection / contact point of the fibers is fused and fixed during the heat treatment of the woven structure is softened. This is because a greater twisting prevention effect can be obtained.

  In the heat-fusible synthetic fiber, for example, (1) synthetic fiber in which the entire fiber is composed of the heat-fusible component, and (2) heat-fusible component are exposed on the fiber surface. Synthetic fiber comprising only components or synthetic fiber containing heat-sealable component and synthetic fiber aligned with non-heat-sealable synthetic fiber, (3) heat-seal component and non-heat-seal component (the above-mentioned heat-seal component) And a composite fiber having a softening point higher than that of the component by 30 ° C. or more. These are preferably used in the form of multifilaments in terms of weaving properties, flexibility and the like.

  As the synthetic fiber (1) in which the entire fiber is composed of the heat-sealing component, for example, a highly shrinkable polyester fiber described in JP-A-2004-232159 is suitable. More specifically, a heat-shrinkable polyester fiber obtained by spinning polyethylene terephthalate obtained by copolymerizing isophthalic acid and 2,2-bis [4- (2-hydroxyethoxy) phenyl] propane by the SPD method. It is done.

  The synthetic fiber in which the whole fiber of the above (1) is composed of the above-mentioned heat fusion component is composed of a copolyester multifilament obtained by copolymerizing the above third component, and has a softening point of 200 ° C. or less, heat Polyester multifilaments having a water shrinkage (BWS) of 10 to 40% are suitable (hereinafter referred to as high shrinkage polyester multifilaments). In this case, when heat treatment is performed after weaving, the gap between the single filaments is filled by the shrinkage stress of the heat-sealing component, and the filaments are easily formed into monofilaments. When monofilaments are formed in this way, the fusion-fixed rigid fibers and non-fusible synthetic fibers are sufficiently fused and fixed, and when used in the wefts of belt-like structures, an appropriate rigidity is obtained while maintaining flexibility. Thus, a better twisting prevention effect and wearing feeling can be obtained. The hot water shrinkage (BWS) of the high shrinkage polyester multifilament is particularly preferably 20 to 40%, and a more excellent twist prevention effect and wearing feeling can be obtained. High-shrinkage polyester multifilaments may be easily deformed during bobbin winding during transportation under harsh conditions at high temperatures, such as in summer trucks. BWS is preferably 20% or less.

  The maximum heat-shrinkage stress of the high-shrinkage polyester multifilament is preferably 0.1 to 1.0 cN / dtex from the viewpoint that the belt-like structure can easily obtain rigidity by being appropriately shrunk while having flexibility. If it is this range, the further superior twist prevention effect and softness | flexibility will be acquired.

  In the case of seat belt webbing and the like, heat setting is usually performed at about 200 ° C., and the dry heat shrinkage ratio of the high-shrinkage polyester multifilament at 130 ° C. is preferably 15% or more, more preferably 20% or more. Further, the dry heat shrinkage at 180 ° C. is preferably 15% or more, and more preferably 20% or more. Within this range, the rigidity in the weft direction can be easily obtained, and a more excellent twist prevention effect can be obtained. In addition, it is preferable that the upper limit is normally about 50% from the viewpoint that the end face of the ear part, which is a folded part of the weft, prevents protrusion and maintains good quality.

  The intrinsic viscosity [η] of the high-shrinkage polyester multifilament is preferably 0.6 to 0.8, and more preferably 0.65 to 0.75, from the viewpoint of easily obtaining an appropriate shrinkage stress. In the high shrinkage polyester multifilament, the fineness is preferably about 100 to 1,000 dtex, the single yarn fineness is preferably about 3 to 25 dtex, and the number of filaments is preferably about 8 to 200. That is, if it is within these ranges, it is possible to obtain a belt-like woven fabric structure with excellent productivity.

In addition, the synthetic fiber obtained by aligning the synthetic fiber containing only the thermal fusion component and / or the thermal fusion component of the above (2) with the non-thermal fusion synthetic fiber is mixed by entanglement treatment after the alignment. Or those that are converged by twisting, twisting or covering are suitable.
As the synthetic fiber containing only the heat fusion component and / or the heat fusion component, those of (1) and (3) are preferably used.

  Furthermore, the bicomponent composite fiber of (3) above has a complete core-sheath structure as a core-sheath type composite filament in which the core portion is composed of a non-heat-sealing component and the sheath portion is composed of a heat-sealing component. In addition to the above, there are various composite forms in which at least a part of the heat fusion component is exposed on the surface. For example, composite fibers having a cross-sectional shape as shown in FIGS. In these drawings, the hatched portion indicates the portion formed with the heat-sealing component, and the white portion indicates the portion formed with the non-heat-sealing component. Also, the cross-sectional contour shape does not necessarily have to be circular, and various cross-sectional shapes such as an ellipse, a hollow, a triangle, a quadrangle, and a star can be used.

  Of these composite fibers, those having a heat fusion component exposed to 40% or more on the fiber surface are particularly suitable. And especially from the point of stability of the twist prevention effect, as shown in FIG. 1A, a core-sheath type composite fiber in which a heat fusion component is arranged in the sheath and a non-heat fusion component is arranged in the core. It is preferable to use it.

  When the core-sheath type composite fiber is used, a core-sheath type composite polyester multifilament using isophthalic acid copolymer polyester as the heat fusion component of the sheath and homopolyester as the non-heat fusion component of the core is optimal. In this case, the core / sheath ratio is preferably set to 5/1 to 1/5 on a volume basis, and particularly preferably set to 3/1 to 1/2.

  And in the said composite fiber, a thing with a single yarn fineness of about 3-25 dtex is suitable, and the number of filaments is about 8-200 is suitable. That is, if it is within these ranges, it is possible to obtain a belt-like woven fabric structure with excellent productivity.

  The belt-like woven fabric structure of the present invention can be obtained by weaving using the non-heat-sealable synthetic fiber and the heat-sealable synthetic fiber. At this time, the heat-fusible synthetic fiber must be used as at least a part of the weft.

  The fineness of the weft of the belt-like woven fabric structure is preferably set to 500 to 3000 dtex in consideration of a feeling of wearing when used as a webbing for a seat belt or the retractability in a retractor. That is, if it is less than 500 dtex, the effect of improving the rigidity in the weft direction may be insufficient. Conversely, if it exceeds 3000 dtex, the rigidity in the warp direction may become too strong and the flexibility may be impaired. is there. Of these, setting to 1000 to 2600 dtex is particularly preferable because it provides a superior balance of rigidity in the warp direction and the weft direction of the woven structure.

  Moreover, it is preferable that the single yarn fineness of the said heat-fusable synthetic fiber is 3-25 dtex. That is, if the single yarn fineness is less than 3 dtex, the spinning / productivity may be reduced, and the rigidity in the weft direction and the wear resistance may be insufficient. Conversely, if the single yarn fineness exceeds 25 dtex, the single yarn fineness exceeds 25 dtex. The rigidity of the yarn becomes too large, and there is a risk that the productivity will also decrease, and the single fiber protrudes from the end surface of the ear part of the woven structure, so that the feeling of wearing is bad when used for applications such as seat belt webbing. This is because there is a risk of becoming. Among them, it is particularly preferable to use a polyester multifilament having a single yarn fineness of 5 to 12 dtex.

  And in this invention, it is preferable that the heat sealing | fusion component of the said heat-fusible synthetic fiber contains 5 weight% or more with respect to the whole weft of a strip | belt-shaped textile structure. That is, if the thermal fusion component is less than 5% by weight, the thermal fusion component used for fusion fixation is too small, and the target weft prevention effect and wear resistance may be insufficient. It is. In addition, if the heat fusion component is too much, the rigidity in the warp direction becomes too strong and the handleability may be deteriorated, or the feeling of wear may be deteriorated when used as a webbing for seat belts. The content ratio depends on the form of the heat-fusible synthetic fiber. For example, when using the said core-sheath-type composite fiber, the suitable content rate is 5 to 20 weight% with respect to the whole weft, More preferably, it is 10 to 15 weight%. In addition, when using a yarn in which non-heat-sealable synthetic fiber and heat-sealable synthetic fiber are aligned, this aligned yarn is used for the total amount of weft and is preferably 5 to 50% by weight, more preferably What contains 10 to 40 weight% of heat-fusion components is suitable.

  The weaving of the belt-like woven fabric structure of the present invention may be any weaving machine that can be used for narrow woven fabrics, such as a needle loom, rapier loom, shuttle loom, etc. It is preferable from the point of productivity to use a needle loom that can be driven two at a time in a state, and can be manufactured at low cost.

  In the needle loom, when the heat-fusible synthetic fiber is driven into at least a part of the weft, the one using multifilament as the heat-fusible synthetic fiber has excellent flexibility and becomes a folded portion. Since there is no thread breakage or protrusion at the end face of the ear part, a product of good quality can be manufactured with high productivity. And when using this strip | belt-shaped textile structure as webbing for seatbelts, the fineness of the weft to drive in is 250-1500 dtex from the point of the feeling of wear when it wears as a seatbelt, and the storing property to a retractor. . Especially, if it is 500-1300 dtex, it will be easy to express rigidity with the balance in the warp direction and the weft direction.

  In the needle loom, the weft yarn is beaten at once in a folded state, so that the weft fineness in the woven fabric is twice the fineness at the time of driving, preferably 500 to 3000 dtex. Preferably it is 1000-2600 dtex.

  The fineness of the warp of the belt-like woven fabric structure of the present invention is not particularly limited, but when used as a webbing for a seat belt, it is easy to have strength, wear resistance and flexibility, so that it is not fused. In the case of a synthetic synthetic fiber, about 300 to 3000 dtex is preferable, and more preferably 500 to 2000 dtex. In this case, the single yarn fineness is preferably 1 to 25 dtex, particularly 4 to 17 dtex. Moreover, it is preferable that the fineness in the case of using a fusible synthetic fiber is about 50 to 500 dtex.

  In addition, when the warp of the band-shaped woven fabric structure of the present invention is a multifilament, it is preferable to apply a twist of about 100 to 500 T / m from the viewpoint of easily having both strength and weaving property. That is, within this range, there is little decrease in strength of the multifilament due to additional twisting, and the multifilament can be made convergent by applying a certain sweet twist, so that weaving is excellent. In addition, since the number of warp threads can be increased, a high-density belt-like structure can be easily obtained, and a sheet webbing having high strength and excellent wear resistance can be obtained.

  The woven structure of the belt-like woven structure of the present invention is not particularly limited, but various woven structures such as twill, plain, and bag can be selected. Among these, twill weave is suitable for application to belts.

Further, the woven density of the belt-like woven fabric structure of the present invention is not particularly limited, but the sum (total CF) of the warp CF and the weft CF shown in the following formula is the feeling of wearing and the rebound when used for the seat belt. From the standpoint of tractor storage, it is preferably about 5,000 to 30,000. More preferably, it is 8,000-20,000. The warp CF is preferably about 3,000 to 29500, and the weft CF is preferably about 500 to 2000. Usually, when used for webbing for seat belts, the warp CF is larger than the weft CF, is thin in thickness by giving strength in the warp direction, and has excellent wear feeling and retractability in the retractor. Become. When the fusible synthetic fiber as in the present invention is used for wefts, it can have strength, wear resistance, rigidity and flexibility even if the number of warps and wefts driven is small. If so, the total CF can be reduced as compared with the normal sheet webbing, and the productivity is improved in this respect as well.

  In addition, the synthetic fiber used for the belt-like woven fabric structure has a small amount of titanium oxide, silicon oxide, calcium carbonate, silicon nitride, aluminum oxide, regardless of whether it is heat-sealable or non-heat-sealable. In addition to inorganic particles such as talc and clay, conventionally known antioxidants, anti-coloring agents, flame retardants, ultraviolet absorbers, antibacterial agents, sequestering agents, various plasticizers, etc. may interfere with synthetic fiber production. And can be added within a range that does not impair the mechanical properties.

  Furthermore, the belt-like woven structure of the present invention may be dyed with a disperse dye or the like under high pressure after weaving. For example, homopolyester multifilament is used as a non-heat-fusion synthetic fiber and heat-fusion is performed. In the case of using a polyester copolymer multifilament as an adhesive synthetic fiber, it is preferable to use an original yarn having excellent light fastness because a desired color can be maintained over a long period of time. As the original deposition method, any colorant addition method such as a method of adding a colorant at the time of resin polymerization, a method of blending and spinning a master chip and a base chip containing a high concentration of colorant may be selected. . Of these, a chip blend method using a master chip is preferred for reasons such as production cost.

  The belt-like woven structure of the present invention is subjected to heat treatment in order to soften the heat-fusible component of the heat-fusible synthetic fiber. The heat treatment temperature depends on the use of the belt-like woven structure. The temperature is set to an appropriate temperature so as to obtain a desired desired rigidity in the weft direction. In addition, when using polyester multifilament as non-heat-fusion synthetic fiber for warp, in order to stabilize an internal structure at temperature higher than crystallization temperature, it heat-processes at 180-220 degreeC, especially 180-200 degreeC, for example. It is preferable to carry out.

  When the belt-like woven structure is used for seat belt webbing, the belt-like woven structure is subjected to heat setting at a temperature of around 200 ° C. under high tension in order to adjust the mechanical properties of the webbing after weaving. Since this heat set also serves as the “heat treatment” in the present invention, the belt-like woven fabric structure in which the fibers are fused and fixed can be obtained without adding a special step.

  Furthermore, the belt-like woven fabric structure of the present invention can be subjected to a low friction treatment as necessary. That is, when used as a seat belt webbing or the like, it is preferable to improve the slippage and improve the retractability to the retractor. As the friction-reducing treatment agent used here, a treatment agent containing a polyether compound is preferable. And these friction-reducing treatment agents may be applied in any step of weaving the belt-shaped woven fabric structure, or may be applied after the belt-shaped woven fabric structure is obtained.

  In the thus obtained belt-like woven fabric structure of the present invention, heat-fusible synthetic fibers are used for at least a part of the weft, and the heat-fusible synthetic fibers or the heat-fusible fibers are heat treated. The synthetic fiber and the non-heat-synthetic synthetic fiber are fused and fixed so that they do not shift in the direction of weft. Therefore, this is difficult to twist in the weft direction (width direction) and is easy to use. In addition, the fabric structure is prevented from twisting by fusing and fixing the fibers, and it is not necessary to increase the rigidity of the heat-fusible synthetic fiber itself, so it is relatively flexible and used as a seat belt webbing. In some cases, an excellent wearing feeling can be obtained. In addition, storage in the retractor, handling of drawers, etc. will be smooth, making it easy to use. In addition, since the multifilament having excellent flexibility can be used as the heat-fusible synthetic fiber, there is no problem even if it is driven at a high speed when weaving it as a weft with a needle loom, and it has the advantage of high productivity. Have

Next, examples and comparative examples of the present invention will be described. However, the present invention is not limited to the following examples.
The intrinsic viscosity, hot water shrinkage (BWS), maximum heat shrinkage stress, and dry heat shrinkage were measured by the following methods.
[Intrinsic viscosity]
The intrinsic viscosity [η] was measured by a conventional method at 20 ° C. in a mixed solvent of phenol / tetrachloroethane = 6/4.
[Hot water shrinkage (BWS)]
A yarn having a sample length of 500 mm multiplied by a load of 2 mg / dtex was immersed in boiling water for 15 minutes and then air-dried, and then the shrinkage was determined by the following equation.
BWS (%) = [(initial sample length−sample length after shrinkage) / initial sample length] × 100
[Maximum heat shrinkage stress]
Using a thermal stress measuring machine KE-2S manufactured by Kanebo Engineering, the sample length is 100 m, the initial load is multiplied by 1/50 g / dtex, and the temperature is raised from room temperature to 250 ° C. at a rate of 120 ° C./min. A stress curve was drawn, and the maximum stress value (cN / dtex) was defined as the maximum heat shrinkage stress.
[Dry heat shrinkage]
JISL1013 8.18.2 b) The dry heat shrinkage rate (%) was determined under the conditions of 130 ° C. and 180 ° C. using the filament shrinkage rate (Method B).

[Example 1]
As a warp, polyester multifilaments originally attached to black with 1670 dtex / 144f, breaking strength 8.4 cN / dtex, elongation 12% are arranged at a warp density of 390 pieces / 2.54 cm, and as wefts, 280 dtex / 16f A core-sheath-type heat-bonded polyester filament comprising polyethylene terephthalate (softening point 185 ° C.) copolymerized with 25 mol% of isophthalic acid in the sheath component and polyethylene terephthalate (melting point 240 ° C.) having an intrinsic viscosity of 0.68 in the core component ( Made by Kanebo Gosei Co., Ltd., Bell Couple (registered trademark), core / sheath ratio = 3/2) and 720 dtex / 72f (softening point 240 ° C), breaking strength 6.5 cN / dtex, elongation 20% Weaving webbing using a needle loom at a width of 5 cm and a weft density of 20 / 2.54 cm It was. Next, the webbing was heat-treated at a temperature of 200 ° C., the sheath component was melted, and the surrounding polyester fibers were fused and fixed to obtain the intended belt-like woven structure.

[Example 2]
As wefts, 5 mol% of 280 dtex / 48 f of isophthalic acid and 5 of 2,2-bis [4- (2-hydroxyethoxy) phenyl] propane were used instead of the core-sheath type heat-fused polyester filament of Example 1 above. Polyester multifilaments using a total amount of the copolymerized components copolymerized in mol% (softening point 200 ° C., intrinsic viscosity 0.69, maximum heat shrinkage stress 0.23 cN / dtex, BWS 23%, 130 ° C. dry heat shrinkage 21%, A target belt-like woven fabric structure was obtained in the same manner as in Example 1 except that 180 ° C. dry heat shrinkage (30%) was used.

Example 3
Instead of the core-sheath-type heat-fused polyester filament of Example 1, 167 dtex / 48 f, polyethylene terephthalate obtained by copolymerizing 25 mol% of isophthalic acid to the sheath component (softening point 185 ° C.), and the core component having an intrinsic viscosity of 0 Except for using a core / sheath type polyester filament made of .68 polyethylene terephthalate (softening point 240 ° C.) (Kanebo Gosei Co., Ltd., Belcouple [registered trademark], core / sheath ratio = 2/1). In the same manner as in Example 1, an intended belt-like woven fabric structure was obtained.

Example 4
As a weft, a core composed of 110 dtex / 24 f of polyethylene terephthalate (softening point 185 ° C.) copolymerized with 25 mol% of isophthalic acid in the sheath component, and polyethylene terephthalate (softening point 240 ° C.) having an intrinsic viscosity of 0.68 as the core component. Weaving was performed by aligning sheath-type heat-fused polyester filaments (manufactured by Kanebo Gosei Co., Ltd., Bell Couple [registered trademark], core / sheath ratio = 1/1). Other than that was carried out similarly to the said Example 1, and obtained the target strip | belt-shaped fabric structure.

Example 5
As the weft, in the cross-sectional shape shown in FIG. 1 (e), polyethylene terephthalate (softening point 185 ° C.) obtained by copolymerizing 25 mol% of isophthalic acid with a cross portion (white content) of 280 dtex / 24f, and other portions ( The hatched part) is a composite heat-fused polyester multifilament made of polyethylene terephthalate (softening point 240 ° C.) having an intrinsic viscosity of 0.68 (exposure rate of heat-sealed component 35%), and 720 dtex / 72f and breaking strength 6.5 cN / Dtex, polyester multifilaments having an elongation of 20% (softening point 240 ° C.) were aligned to perform weaving. Other than that was carried out similarly to the said Example 1, and obtained the target strip | belt-shaped fabric structure.

[Comparative Example 1]
A 330 dtex monofilament was used as the weft. Other than that was carried out similarly to the said Example 1, and obtained the target strip | belt-shaped fabric structure.

[Comparative Example 2]
As a weft, weaving was performed only with a polyester multifilament (softening point 240 ° C.) having a breaking strength of 6.5 cN / dtex and an elongation of 20% at 1100 dtex / 96f. Other than that was carried out similarly to the said Example 1, and obtained the target strip | belt-shaped fabric structure.

  For these example products and comparative example products, weft rigidity, wear resistance, strength retention after wear, webbing storage / drawability, webbing productivity, breaking strength / elongation, comfort (flexibility / wear The feeling was evaluated according to the following method. The results are also shown in Table 1 below.

[Latitude rigidity]
According to JIS L-1096 8.20.3 bending rebound, the loop hardness and bending restitution rate only in the weft direction were measured according to the C method (loop compression method) and evaluated as follows.
Loop hardness is 2N or more and bending repulsion rate is 20% or less.
The loop hardness is 2N or more and the bending repulsion rate exceeds 20%.
Loop hardness is less than 2N and bending rebound rate is 20% or less.
The loop hardness is less than 2N and the bending repulsion rate exceeds 20%.

[Abrasion resistance and strength retention after wear]
The strength retention after wear was measured according to JIS D-4604 and evaluated as follows.
The strength retention after wear is 85% or more.
Strength retention after wear is 80% or more and less than 85%… △
Strength retention after wear is less than 80%… ×

[Webbing storage / drawability]
A 1999 Volkswagen car Autoliv retractor was attached with a belt-like woven structure (5 cm wide, 3 m long) and 50 g weight of the example product and comparative example product, 1 m pulled out, and a 180 ° twist was added. The test of whether or not it was smoothly stored in the retractor was performed 50 times. And what was able to be accommodated once without failure was marked with ◯, what was unsuccessfully stowed once or twice, and what was unsuccessfully stowed three times or more was marked with ×.

[Webbing productivity]
In the needle loom, weaving was performed for 2 hours, and the average weaving length per minute was determined and evaluated as follows. In addition, before starting weaving, after weaving appropriate weaving conditions for 1 to 2 hours in advance, weaving was performed.
Average weaving length of 2.5 m / min or more… ◎
Average weaving length of 2.0 m / min or more and less than 2.5 m / min ... ○
Average weaving length of 1.5 m / min or more and less than 2.0 m / min ... △
Average weaving length less than 1.5 m / min… ×

[Comfort (flexibility, wearing feeling)]
The belt-like fabric structures (width: 5 cm, length: 3 m) of the example product and the comparative example product were respectively mounted on a general passenger car as a seat belt webbing. Each of the five monitors (four boys and one girl in the 20 to 50-year-old range) drives for two hours, and the following are two indications of comfort: seat belt flexibility and feeling of wear. Sensory evaluation was performed as follows. The driver's jacket was driven only by clothes that were close to underwear (T-shirts, blouses, polo shirts, etc.).
・ Flexibility Flexibility is less than 1 person ...
More than 2 people complaining about flexibility… ×
・ A feeling of wearing One person who is dissatisfied with the feeling of wearing is less than one ...
Two or more people dissatisfied with the wearing feeling… ×

  Examples 1 and 3 were excellent in rigidity in the weft direction while maintaining flexibility. The webbing storage and withdrawal properties were also good. Examples 3 and 4 were comfortable when worn as seat belts, although the stiffness in the weft direction and the webbing storage / drawability were inferior to those of Example 1. In Example 2, the flexibility in the weft direction was good while maintaining flexibility, and the webbing storage / drawing property was excellent. Moreover, the thing of Example 2 was more flexible than the thing of Example 1, and the feeling of wear was comfortable.

Example 6
As wefts, 5 mol% of 280 dtex / 48 f of isophthalic acid and 5 of 2,2-bis [4- (2-hydroxyethoxy) phenyl] propane were used instead of the core-sheath type heat-bonded polyester filament of Example 1 above. Polyester multifilament using a total amount of copolymerized components in mol% (softening point 200 ° C., intrinsic viscosity 0.69, maximum heat shrinkage stress 0.15 cN / dtex, BWS 13%, 130 ° C. dry heat shrinkage 13%, A target belt-like woven fabric structure was obtained in the same manner as in Example 1 except that 180 ° C. dry heat shrinkage (12%) was used.

Example 7
As wefts, 3 mol% of 280 dtex / 48 f of isophthalic acid and 3 of 2,2-bis [4- (2-hydroxyethoxy) phenyl] propane were used instead of the core-sheath type heat-fused polyester filament of Example 1 above. Polyester multifilament using a total amount of copolymerized components by mol% (softening point 210 ° C., intrinsic viscosity 0.69, maximum heat shrinkage stress 0.12 cN / dtex, BWS 10%, 130 ° C. dry heat shrinkage 11%, A desired belt-like woven fabric structure was obtained in the same manner as in Example 1 except that 180 ° C. dry heat shrinkage 15%) was used.
The obtained belt-like woven structure was superior in rigidity in Example 2, but it was soft and good in wearing feeling.

Example 8
As wefts, 5 mol% of 280 dtex / 48 f of isophthalic acid and 5 of 2,2-bis [4- (2-hydroxyethoxy) phenyl] propane were used instead of the core-sheath type heat-fused polyester filament of Example 1 above. Polyester multifilaments using a total amount of copolymerized components of mol% (softening point 200 ° C., intrinsic viscosity 0.69, maximum heat shrinkage stress 0.10 cN / dtex, BWS 5%, 130 ° C. dry heat shrinkage 6%, A target belt-like woven fabric structure was obtained in the same manner as in Example 1 except that 180 ° C. dry heat shrinkage (12%) was used.
The obtained belt-like woven structure was superior in rigidity in the case of Example 6, but it was flexible and had a good wearing feeling.

  About the thing obtained in Example 2, 6-8, the rigidity of a latitudinal direction, abrasion resistance, the strength retention after abrasion, webbing accommodation / drawability, webbing productivity, breaking strength / elongation, comfort (flexible) It shows in Table 2 about a property and a feeling of wear.

Claims (11)

A belt-shaped woven fabric woven using non-heat-sealable synthetic fibers and heat-sealable synthetic fibers containing a heat-seal component having a softening point lower than that of the non-heat-sealable synthetic fibers by 30 ° C. or more on the fiber surface. The heat-fusible synthetic fiber is used in at least a part of the wefts constituting the woven structure, and is heat-treated at a temperature equal to or higher than the softening point temperature of the heat-fusion component. A belt-like woven fabric structure in which fusible synthetic fibers or heat fusible synthetic fibers and non-heat fusible synthetic fibers are fused and fixed to each other. The belt-like woven fabric structure according to claim 1, wherein the heat-fusible component of the heat-fusible synthetic fiber is contained in an amount of 5% by weight or more based on the total amount of weft of the belt-shaped woven fabric structure. The belt-like woven fabric structure according to claim 1 or 2, wherein the heat-fusible component of the heat-fusible synthetic fiber is exposed to 15% or more on the fiber surface. The belt-like woven structure according to claim 1 or 2, wherein the weft of the belt-like woven structure is made of a polyester multifilament of 500 to 3000 dtex, and the softening point of the heat fusion component is 120 to 220 ° C. The heat-fusible synthetic fiber is a core-sheath type polyester multifilament having a copolymer polyester mainly composed of polyethylene terephthalate as a sheath component and a homopolyester as a core component, and the non-heat-fusible synthetic fiber is The belt-like woven fabric structure according to claim 1 or 2, which is a homopolyester multifilament. The heat-fusible synthetic fiber is a polyester multifilament made of a polyethylene terephthalate copolymer copolymerized with a third component, having a softening point of 200 ° C. or lower and a hot water shrinkage (BWS) of 10 to 40%. Item 3. A belt-like woven fabric structure according to item 1 or 2. The heat-fusible synthetic fiber is a polyester multifilament comprising a polyethylene terephthalate copolymer copolymerized with a third component, having a softening point of 200 ° C. or less and a dry heat shrinkage stress of 0.1 to 1.0 cN / dtex. The belt-like woven fabric structure according to claim 1 or 2. The heat-fusible synthetic fiber is a polyester multifilament made of a polyethylene terephthalate copolymer copolymerized with a third component, having a softening point of 200 ° C or lower and a dry heat shrinkage at 180 ° C of 15% or higher. 3. A belt-like woven fabric structure according to 1 or 2. The belt-like woven structure according to claim 1 or 2, wherein the belt-like woven structure is woven using a needle loom. A method for producing a belt-like woven fabric structure according to claim 8, wherein a needle loom is used to weave a polyester multifilament of 250 to 1500 dtex, which is a heat-fusible synthetic fiber, into at least a part of the weft. A process for producing a belt-like woven fabric structure characterized by the following. The process for producing a strip-shaped woven fabric structure according to claim 9, wherein the single-filament fineness of the heat-fusible synthetic fiber is 3 to 25 dtex.