JP2015124455A - Woven fabric and molded body including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a woven fabric of synthetic fibers suitable for cold press molding and a molded body which is free from floating from a base material of a woven fabric, peeling and deformation and the like.SOLUTION: The woven fabric of synthetic fibers is suitable for cold press molding in a state where it is laminated on a base material. The value calculated according to [warp fineness (dtex)×warp density (number of warp/inch)+weft fineness (dtex)×weft density (number of weft/inch)] is 33000 or less. As the synthetic fiber, polyethylene terephthalate fiber is preferable. The molded body is obtained by joining the aforementioned specific woven fabric to a base material made of resin foam or the like. The molded body is, for example, an interior material such as a ceiling material for a vehicle.

Description

  The present invention relates to a woven fabric and a molded body including the same. More specifically, the present invention is based on the fineness of each of the warp and weft and the respective yarn densities in the warp and weft directions, the value calculated by a specific formula is not more than a predetermined value, and cold press molding And a molded article in which the textile is bonded to a base material and does not cause deformation of the molded article due to residual stress of the textile, and does not cause the textile to float or peel off from the base material.

  Conventionally, vehicle interior materials including a skin material, a core material, and the like are known. For example, a vehicle interior material comprising a skin material made of nonwoven fabric, woven fabric, knitted fabric, etc., and a core material made of polyurethane or polyolefin foam, etc., can be obtained by a molding method in which the skin material etc. is pre-heated and then cold pressed. Is known (for example, see Patent Document 1).

JP 2011-792 A

  As described in Patent Document 1, a method of forming an interior material for a vehicle by a cold press is known. However, in the cold press, the skin material and the core material are pre-heated and then press-molded with a molding tool cooled to room temperature or cooled. In this case, in the knitted fabric, since the loop structure is deformed and stretched, the residual stress is small. Moreover, in a nonwoven fabric, since an entanglement structure once melts and is re-fixed after shaping, the residual stress is small. On the other hand, in the woven fabric, the bias direction is structurally easy to stretch, but in the vertical and horizontal directions, the yarn itself is stretched and stretched, so that the skin material is torn or the residual stress of the skin material stretched by molding is The interior material itself may be deformed by the residual stress, or the skin material may float or peel off from the base material.

  The present invention has been made in view of the above-described conventional situation, and is calculated by a specific formula based on the warp fineness and warp direction yarn density, and the weft fineness and weft direction yarn density. The fabric is suitable for cold press molding, and this fabric is laminated on the base material, and the molded body itself is deformed or the fabric floats from the base material due to the residual stress of the fabric. An object of the present invention is to provide a molded article that does not peel off.

  As a molded body such as a vehicle interior material, a molded body formed by shaping a laminated body obtained by bonding a base material made of a resin foam and a skin material made of a woven fabric through a bonding layer into a predetermined shape. Are known. Known molding methods include cold press molding and hot press molding. Among these molding methods, in hot press molding, a molding die set at a high temperature is used. Therefore, even if the fabric is stretched at a deformed portion or the like of the molded body, the residual stress is not excessively increased.

On the other hand, in cold press molding, the base material and the fabric are preheated together with the adhesive layer, and then cooled while being molded by a normal temperature or cooled mold, so that the residual stress when the fabric is stretched increases. . Thus, when the residual stress of a textile fabric is large, the textile fabric may float or peel off from the substrate after molding. Further, when the joining force is large, the molded body may be deformed. Therefore, problems in such cold press forming were examined. As a result, the fineness of each of the warp and the weft, and the respective yarn densities in the warp and weft directions are set to be low, and the numerical value calculated by a specific formula based on the fineness and the yarn density is set to a predetermined value or less. Thus, it has been found that the above-mentioned problems can be solved.
The present invention has been made based on such knowledge.

The present invention is as follows.
1. A synthetic fiber fabric suitable for cold press molding in a state of being laminated on a substrate,
A woven fabric characterized in that a value calculated by [warp yarn fineness (dtex) × warp density (main / inch) + weft fineness (dtex) × weft density (main / inch)] is 33,000 or less.
2. 1. The synthetic fiber is a polyethylene terephthalate fiber. The woven fabric described in 1.
3. 1 above. Or 2. And a base material bonded to the fabric.
4). 2. The molded article is a vehicle interior material. The molded product according to 1.

The woven fabric of the present invention is a synthetic fiber woven fabric suitable for cold press molding in a state of being laminated on a substrate. The sum of the product of the warp fineness and the warp density and the product of the weft fineness and the weft density is equal to or less than a predetermined value.
If it is set as such a structure, the residual stress of the textile fabric in the cold press molding in the state laminated | stacked on the base material is suppressed. Thereby, when it is set as a molded object, a deformation | transformation of a molded object and the float of the textile fabric from a base material, and peeling do not arise.
Further, when the synthetic fiber is a polyethylene terephthalate fiber, it can be made into a woven fabric having excellent strength and the like, and can be easily molded.
The molded body of the present invention is formed by joining the woven fabric of the present invention and a base material.
With such a configuration, even when cold press molding is performed, deformation of the molded body, and lifting and peeling of the fabric from the substrate are prevented.
Furthermore, when a molded object is a vehicle interior material, it can be set as various molded objects which have deformation parts, such as a ceiling material and a door trim. In particular, the fabric can be prevented from floating and peeling off from the base material at the deformed portion. Further, there is no deformation of the interior material due to the residual stress of the fabric.

It is typical explanatory drawing for demonstrating an example of the method of dry heat processing. It is explanatory drawing showing the measurement point A of the front-back and left-right direction and deformation amount of the ceiling material for vehicles. It is explanatory drawing showing the deformation | transformation direction and deformation amount of the terminal of the ceiling material in the measurement point A. It is a graph showing the correlation between time and stress in a tensile test simulating cold press molding using a fabric or the like.

Hereinafter, the present invention will be described in detail with reference to the drawings.
The items shown here are for illustrative purposes and exemplary embodiments of the present invention, and are the most effective and easy-to-understand explanations of the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be. In this respect, it is not intended to illustrate the structural details of the present invention beyond what is necessary for a fundamental understanding of the present invention. It will be clear to those skilled in the art how it is actually implemented.

1. Fabric The fabric of this embodiment is a synthetic fiber fabric suitable for cold press molding in a state of being laminated on a substrate. Also, a value (hereinafter referred to as “dD value”) calculated by [warp fineness (dtex) × warp density (main / inch) + weft fineness (dtex) × weft density (main / inch)] is 33000. It is as follows.

(1) Synthetic fiber Examples of the synthetic fiber used in the woven fabric include polyester fibers such as polyethylene terephthalate (PET) fiber, polybutylene terephthalate fiber, polytrimethylene terephthalate fiber, and polylactic acid fiber. Also, various synthetic fibers such as polyamide fibers such as nylon 6 fibers and nylon 66 fibers, and polyolefin fibers such as polyacrylic fibers and polypropylene fibers can be mentioned. Of these fibers, polyester fibers, particularly PET fibers, having high strength and excellent durability are preferred.

  The synthetic fiber may be an undrawn yarn, a semi-drawn yarn, or a mixed yarn in which these are mixed. Whether it is an undrawn yarn or a semi-drawn yarn can be distinguished by the winding speed at the time of spinning. For example, in the case of PET fibers, the case of 400 m / min to less than 2500 m / min can be used as an undrawn yarn, and the case where the winding speed is approximately 2500 to 4500 m / min can be used as a semi-drawn yarn. As this yarn, it is preferable to use a semi-drawn yarn because the handleability of the yarn is good. The undrawn yarn and the semi-drawn yarn have a low stress as compared with the drawn yarn drawn after spinning, and the elongation increases little by little as the stress increases. For this reason, a woven fabric using undrawn yarn and / or semi-drawn yarn is easy to be shaped at the time of molding the molded body, and the molded body is easy to manufacture.

  Undrawn yarn or semi-drawn yarn is used after being heat-treated in order to prevent large shrinkage when heat-treated as a woven fabric. The heat treatment method is not particularly limited. For example, as shown in FIG. 1, the yarn is supplied from the supply side [see the yarn (1) before treatment] to the winding side [see the yarn after treatment (3)]. And a heat treatment method. In this case, a heat treatment for supplying the yarn while maintaining a constant length may be used, or a relaxation heat treatment for supplying to the overfeed may be used. In FIG. 1, reference numeral (5) denotes a heater, reference numeral (7) denotes a supply roller, reference numeral (9) denotes a take-up first roller, and reference numeral (11) denotes a take-up second roller. , (13) means an air entanglement device, and (15), (17), (19) means a guide.

  The heat treatment includes a dry method and a wet method. In this embodiment, the heat treatment is performed by a dry method, that is, a dry heat treatment. The temperature in the dry heat treatment is not particularly limited depending on the material such as the semi-drawn yarn, the elongation rate, and the like, but in the case of the non-contact type as shown in FIG. Further, the time for the traveling yarn to pass through the heating atmosphere is also appropriately adjusted depending on the material such as the semi-drawn yarn, the elongation rate, etc., but can usually be 0.05 to 1.2 seconds.

  In the case of the wet method, for example, water vapor is sprayed on the unstretched yarn or semi-stretched yarn wound around the core, or the unstretched yarn or semi-stretched yarn wound on the core is treated with a heat treatment bath. Or is heat treated. However, in these cases, a difference may occur in the elongation rate between the inner side and the outer side of the whisper. For this reason, in the present embodiment, the dry method is selected and heat treatment is performed. As a result, it is possible to obtain a yarn that has no difference in elongation or the like in the length direction, or at least a difference that is small.

  Moreover, the yarn subjected to the dry heat treatment may be entangled or not entangled, but it is preferably entangled to improve the convergence. When entangled, a plurality of yarns are intertwined in a complicated manner. Examples of the entanglement method include air entanglement such as interlace processing. In the air entanglement, the yarn convergence is improved by the fluid injection process during the entanglement. Furthermore, in the air entanglement, high-pressure air is injected into the traveling yarn bundle and is intertwined intermittently. The method and conditions for air entanglement are not particularly limited, and can be carried out according to general methods and conditions.

  Furthermore, twist can be added to the dry-heat treated yarn. The twisting method is not particularly limited, and can be twisted by an existing method. The twisting machine is not particularly limited, and may be any of an up twister, a down twister, and a double twister. The twist direction may be either S or Z, and may be combined in any way. As a structure of the twisted yarn, one yarn may be twisted, or a plurality of yarns may be twisted together. Further, the fineness and cross-sectional shape of the yarn may be combined in any way. Furthermore, the form of the yarn to be twisted may be a multifilament or a monofilament, but in the case of a multifilament, the effect of twisting is more greatly expressed.

(2) Woven fabric, fineness, and yarn density The structure of the woven fabric is not particularly limited, and for example, various fabrics such as a plain woven fabric, a twill woven fabric, a satin woven fabric, and combinations thereof can be used. Further, the fineness of the synthetic fiber and the yarn density of the woven fabric have a dD value of 33000 calculated by [warp fineness (dtex) × warp density (main / inch) + weft fineness (dtex) × weft density (main / inch)]. As long as it is as follows, it is not particularly limited. When it is assumed that the woven fabric is used as a vehicle interior material, for example, a skin material such as a ceiling material, the fineness of the synthetic fiber can be 50 to 350 dtex, particularly 70 to 300 dtex. Furthermore, the yarn density of the woven fabric can be, for example, 50 to 250 yarns / inch, particularly 70 to 200 yarns / inch, for both the warp density and the weft density. Thus, by setting both the fineness and the yarn density to be low and the dD value to be 33000 or less, a woven fabric suitable for cold press molding can be obtained.

  The fineness of the synthetic fiber and the yarn density of the woven fabric can be set in combination within the above numerical range as long as the dD value is 33000 or less, but using synthetic fibers having substantially the same fineness, the warp density and It is more preferable that the weft density is substantially the same. With such a woven fabric, weaving is easy, physical properties such as strength and elongation of the woven fabric can be improved, and a woven fabric having an excellent appearance can be obtained. The dD value is 33000 or less, but the lower limit of the dD value can be set to 10,000 in consideration of the fineness and yarn density described above. Accordingly, the dD value can be 10,000 to 33000, particularly 12000 to 33000.

(3) Joining and forming method of base material and woven fabric The woven fabric of the present embodiment having a dD value of 33000 or less is suitable for cold press molding in a state of being laminated on the base material. In this cold press molding, (a) the base material and the fabric provided with the adhesive layer are heated, and then the surface of the base material provided with the adhesive layer and the fabric surface are laminated facing each other, It can be formed by interposing between the forming dies of a cold press machine and applying pressure. In addition, (b) the surface of the base material provided with the adhesive layer and the fabric surface are laminated facing each other, and then the laminated body is heated under pressure, and then between the molds of the cold press machine. It can also be formed by interposing and pressurizing. Furthermore, (c) an adhesive film is laminated between the base material and the woven fabric, and then the laminate is heated under pressure, and then interposed between the molds of the cold press machine, It can also be molded by applying pressure. Among these forming methods, in (a), the purpose of heating the fabric is to promote the melting of the laminated adhesive layer, so the fabric itself is not heated to a very high temperature. On the other hand, in (b) and (c), the laminated body is heated sufficiently under pressure, so that the fabric itself is directly heated sufficiently, so that the temperature becomes higher. Therefore, it is more preferable to mold by the method (b) or (c).

  The adhesive layer can also be provided on one side of the fabric, and the adhesive can be attached to the one side of the fabric. Furthermore, it is also possible to provide an adhesive layer on one surface side of each of the base material and the woven fabric, laminate the surfaces facing each other, and join them by cold press molding or the like as described above.

  Even in the case of cold press molding as described above, in the fabric of this embodiment, the dD value is 33000 or less, so that the residual stress is small, and the molded body is deformed and the fabric is lifted and peeled off from the substrate. There is no.

  The fabric of this embodiment is suitable for cold press molding, but can be used in other molding methods. For example, it can also be used for hot press molding in which the surface of the base material provided with the adhesive layer and the fabric surface are opposed to each other and interposed between the molds of a hot press machine, and heated and pressed. In addition, when the resin is attached to one side of the woven fabric as will be described later, the surface on which the resin is attached and the surface provided with the adhesive layer of the base material face each other. It can also be used for hot press molding in which it is interposed and heated and pressed.

  Furthermore, the woven fabric of this embodiment is formed into a preform having a predetermined shape by press forming the base material, and then the base material and the woven fabric are bonded to each other with an adhesive or the like while the woven fabric is shaped to conform to the preform. It can also be used in a two-step method of joining. In the two-step method, which is one type of hot press molding, the temperature of the fabric during molding can be increased, so the residual stress of the fabric after molding is sufficiently small, and the fabric of this embodiment is suitable for cold press molding. It is suitable and can be used in a two-step method.

(4) Material and physical properties of base material The material of the base material is not particularly limited. For example, (a) a base material in which inorganic fibers such as glass fibers are bound with a resin such as polypropylene, and (b) a sheet made of inorganic fibers such as glass fibers is bonded to both surfaces of a resin foam, particularly a semi-rigid polyurethane foam. And a base material made of (c) a resin foam, particularly a semi-rigid polyurethane foam. In cold press molding, it is preferable to use the base material (a) or (b). In addition, the base material which consists of a semi-rigid polyurethane foam can be produced by the method of foaming by a conventional method and cutting out so that it may become a predetermined dimension from the shape | molded slab foam. Furthermore, as the base material made of resin foam, rigid foam made of various general-purpose thermoplastic resins such as polyolefin resin, polyester resin and polyamide resin can be used in addition to polyurethane foam. Moreover, the fiber reinforced resin foam using the foam raw material mix | blended inorganic fiber, such as glass fiber, can also be used.

  The substrate is usually in the form of a sheet. When the base material and the woven fabric that is the skin material are joined, for example, when a laminate in which the base material and the woven fabric are laminated is molded and joined, a flat shaped product is obtained. This flat molded body can be used as it is depending on applications and the like. However, a predetermined shape is often given to the molded body. Thus, the molded object to which the predetermined shape is given often has a deformed part by deep drawing or the like. As described above, even if the molded body has a deformed portion, if the fabric of this embodiment has a dD value of 33000 or less, even if cold press molding is performed, the deformation of the substrate and the fabric from the substrate Floating and peeling can be sufficiently prevented.

  Further, as a method for preventing the deformation of the molded body and the lifting and peeling of the fabric from the base material even by cold press molding, there is a method using a high density base material, that is, a base material having high rigidity. Moreover, the method of using the base material which consists of a material with higher hardness is mentioned. Thus, it is possible to cope with the physical properties of the substrate. However, since there are problems such as high cost and an increase in the weight of the molded body, it is preferable to consider and adopt from the viewpoints of low cost and light weight.

(5) Adhesive layer The adhesive layer is not particularly limited, and various resin-based adhesives can be used for forming the adhesive layer. As this resin adhesive, polyolefin resin having adhesiveness such as ethylene / acrylic acid copolymer and acid-modified polyethylene resin can be used. Furthermore, a polyurethane resin adhesive can also be used. A thermoplastic elastomer adhesive such as urethane or styrene can also be used. The form of the adhesive layer is not particularly limited, and may be an adhesive thermoplastic resin film, an adhesive thermoplastic elastomer film, or the like, an emulsion containing the above-mentioned various resin adhesives as an adhesive component, slurry, It may be an adhesive layer formed using a gel adhesive, a powder adhesive, a foamed resin adhesive, or the like.

2. Molded body The molded body of the present embodiment is formed by joining the fabric of the present embodiment and the above-described base material. As described above, the molding method of the molded body includes cold press molding and hot press molding. However, the molded body of the present embodiment can be deformed and woven from the base material even when cold pressed. No floating or peeling.

  After the dry heat treatment, the woven fabric, the woven fabric using the entangled yarn, and the woven fabric using the twisted yarn can be bonded to the substrate and used as a skin material. . In this case, a woven fabric can be joined to a base material by an adhesive layer or the like provided on one surface side of the base material to produce a molded body. However, there are many voids in the woven fabric, and in particular, a woven fabric woven using twisted yarn has more voids. For this reason, when a woven fabric is used as it is, it may be difficult to handle it during the production of a molded body. In addition, the base material and the woven fabric may not be bonded sufficiently firmly. Furthermore, the adhesive layer provided on the one surface side of the base material may melt and flow, ooze out on the surface of the fabric, and the appearance of the molded body may be impaired.

  Therefore, it is preferable that at least the resin is attached to one side of the woven fabric to be bonded to the adhesive layer provided on the base material to be bonded to the base material. In this case, the resin is mixed into the adhesive layer, and the base material and the fabric are bonded more firmly. Also, if the resin adheres to the fabric to be bonded to the base material, even if the adhesive layer on one side of the base material melts and flows, the resin becomes a dyke and the adhesive layer becomes the fabric. It is possible to prevent the appearance of the molded body from being damaged by oozing out on the surface of the film. Further, the resin has almost no fuzz when it is cut, and post-processing for treating the fuzz can be omitted. Note that at least the resin is attached means that the resin is attached to the surface of one side of the woven fabric or is attached and a part of the resin is impregnated on the one side of the woven fabric.

  Further, for example, when the molded body is a vehicle ceiling material, the woven fabric is often stretched by 20 to 90%, particularly 30 to 80% and joined to the base material in the deformed portion such as the peripheral portion. If the woven fabric is stretched by 20 to 90% and bonded to the substrate, generation of wrinkles in the molded body after molding is prevented. Moreover, the fabric is not excessively stretched and the fabric does not become too thin at the deformed portion. On the other hand, as described above, when the woven fabric is elongated, when the residual stress of the woven fabric is large, the molded body may be deformed and the woven fabric may be lifted or peeled off, but the dD value is 33000 or less. Such a thing can be prevented if it is the textile fabric of this embodiment which is.

  Furthermore, the use of the molded body is not particularly limited, and examples thereof include interior molded bodies for vehicles and interior molded bodies for buildings. Examples of vehicles include passenger cars, buses, trucks, etc., as well as railway vehicles, construction vehicles, agricultural vehicles, and industrial vehicles. In addition, the molded product of the present invention can be used as a molded product for interiors of aircraft, ships, and the like. The molded body is particularly useful as a ceiling for passenger cars, buses, trucks, etc., door trims, instrument panels, pillars, sun visors, package trays, and the like.

Hereinafter, the present invention will be specifically described by way of examples.
Examples 1-6 and Comparative Examples 1-6 (woven fabric and its dD value)
The relaxation heat-treated yarn made of PET fiber and subjected to relaxation heat treatment as shown in FIG. 1 is entangled with air, and then twisted to adjust the fineness of Examples 1 to 6 and Comparative Examples 1 to 6 shown in Table 1. A multifilament was obtained. Next, using this multifilament, a plain fabric was woven at the warp density and the weft density shown in Table 1. The dD value was calculated based on the fineness, warp density, and latitude density. As a result, as described in Table 1, the dD values were 14784 to 32736 in Examples 1 to 6. On the other hand, in Comparative Examples 1-6, it was 44352-88704.

  According to Table 1, in Examples 1-6, the dD value is 33000 or less. Therefore, when a molded body is produced by cold press molding using these woven fabrics, the residual stress of the woven fabric is small, and the deformation of the molded body and the lifting and peeling of the woven fabric from the base material are prevented.

Examples 7 to 8 and Comparative Example 7 (Manufacture of vehicle ceiling material which is a molded body)
The woven fabrics of Examples 2 and 3 and the woven fabric of Comparative Example 3 were used, and these woven fabrics and glass fibers were bound by polypropylene, and had a thickness of 3 mm and a basis weight of 625 g / m ^2. The base material provided with the urethane adhesive layer was heated until the temperature of the fabric was 130 ° C. and the temperature of the adhesive layer was 200 ° C. on the base material side. Thereafter, the surface of the base material provided with the adhesive layer and the fabric surface were laminated to face each other. Next, the heated laminate was placed in a mold controlled to 20 ° C. for 27 seconds and cold-press molded [the molding method (a) described above]. Also, the surface of the base material provided with the adhesive layer and the fabric surface are laminated facing each other, then heated until the temperature of the adhesive layer reaches 200 ° C., and then the same as (a). Cold press-molded [the molding method (b) described above]. In this way, cold press molding was performed, and then the molded product was taken out from the mold, and the entire outer periphery was trimmed to produce a vehicle ceiling material (the ceiling material using the fabric of Example 2 is Example 7, Example The ceiling material using the fabric of No. 3 is Example 8, and the ceiling material using the fabric of Comparative Example 3 is Comparative Example 7.)

  The vehicle ceiling material manufactured as described above was allowed to stand on a flat surface without applying a load. Thereafter, each ceiling member was placed on a deformation measuring jig, and the amount of deformation at the peripheral edge of the ceiling member was measured. Table 2 shows the amount of deformation in the surface direction and the thickness direction at the measurement point A in FIG. In addition, if the deformation amount in this part is within ± 2.0 mm (target value) from the position when the ceiling material is placed on the deformation amount measuring jig, the ceiling material has no problem in practical use. . Further, the shape of the end of the ceiling material at the measurement point A and the direction of deformation represented by + and − are as illustrated in FIG. 3. Although the selected measurement point depends on the shape of the mold, in the ceiling type, the measurement point A that is easily deformed and located at a large deformation amount is selected, and the deformation amount at this point is measured as a representative value.

  According to Table 2, in Comparative Example 7 which is a ceiling material using the fabric of Comparative Example 3 having a dD value of 45332, the surface direction and the thickness are obtained by any of the molding methods (a) and (b) described above. It can be seen that the amount of deformation in the direction greatly exceeds the target value and is inferior. On the other hand, in Examples 7 and 8 which are ceiling materials using the woven fabrics of Examples 2 and 3 having a dD value of 33000 or less, the surface direction and thickness are obtained by any of the molding methods (a) and (b) described above. It can be seen that the amount of deformation in the vertical direction is both lower than the target value and is excellent. In particular, in the molding method (b), the amount of deformation is significantly below the target value, and in Example 8 using the woven fabric of Example 3 having a smaller dD value, the amount of deformation is smaller. It is confirmed that the molding method is preferable.

Experimental Examples 1-5
Assuming residual stress in cold press molding, the correlation between time and stress was examined when a tensile test of fabrics and the like was performed using an autograph tester. The results are as shown in FIG. The samples used were the fabric of Comparative Example 3 in Table 1 (Experimental Example 1), the fabric of Example 1 (Experimental Example 2), the fabric of Example 3 (Experimental Example 3), and the fabric of Example 2 (Experimental Example 4). ) And a non-woven fabric (Experimental Example 5). A specific test method is to set a specimen having a length of 200 mm and a width of 50 mm at a distance between chucks of 100 mm, and in a thermostatic chamber adjusted to 80 ° C. assuming elongation of a fabric or the like during cold pressing. After heating for 1 minute, it was extended 40% at a pulling rate of 200 mm / min. Next, from point A to point B, assuming pressure bonding and cooling during cold pressing, hold at 80 ° C. for 30 seconds, and thereafter, from point B to point C, decompression and cooling after molding are assumed. The thermostat was removed from the specimen and allowed to cool at room temperature (20-25 ° C.) for 30 seconds.

Of the five types of samples, the nonwoven fabric of Experimental Example 5 has been conventionally used as a skin material for ceiling materials for vehicles, and does not cause deformation of the molded body, and does not float or peel off from the base material even when cold-press molded. It is a non-woven fabric that has been confirmed. Therefore, if the fabric after pressure reduction and air cooling is smaller than the sample 5, even if it is used for cold press molding, it will not cause deformation of the molded body, and lift or peeling of the fabric from the substrate after molding. It is guessed. According to FIG. 4, in Experimental Examples 2, 3, and 4, since the stress after depressurization and air cooling is smaller than Experimental Example 5, deformation of the molded body, and lifting or peeling of the fabric from the base material are caused. Absent. On the other hand, in Experimental Example 1 in which the stress after depressurization and air cooling is larger than Experimental Example 5, deformation of the molded body, and lifting and peeling of the fabric from the substrate occur.
In Example 4 where the residual stress after depressurization and air cooling is smaller than in Example 5 and is most approximate to Example 5, the fabric of Example 2 is used. Further, as shown in Table 2, the woven fabric of Example 2 is used in the ceiling material of Example 7 in which the deformation amount is approximated by the target value. Based on the fact that the dD value of the fabric of Example 2 is approximately 33000, the upper limit of the dD value was set to 33000 in the fabric of this embodiment.

  INDUSTRIAL APPLICABILITY The present invention can be used in the technical field of a woven fabric that can be used as a skin material of a molded body, and a molded body for interiors such as vehicles and houses, in which the woven fabric is bonded to a substrate. Useful when the body is molded by cold pressing.

  DESCRIPTION OF SYMBOLS 1; Yarn before processing, 3; Yarn after processing, 5; Heater, 7; Feeding roller, 9; Taking first roller, 11; Taking second roller, 13; Air entanglement device, 15, 17, 19; guide.

Claims (4)

A synthetic fiber fabric suitable for cold press molding in a state of being laminated on a substrate,
A woven fabric characterized in that a value calculated by [warp yarn fineness (dtex) × warp density (main / inch) + weft fineness (dtex) × weft density (main / inch)] is 33,000 or less.   The woven fabric according to claim 1, wherein the synthetic fiber is a polyethylene terephthalate fiber.   A molded body comprising the woven fabric according to claim 1 and the base material joined to each other.   The molded body according to claim 3, wherein the molded body is a vehicle interior material.

Images