JPS5930826B2 - Method for manufacturing heat-sealable fiber sheet for interlining - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves laminating or forming a covering layer on the surface of an air-permeable fiber sheet with heat-fusible short fibers of fine fineness formed from a melt of a polymer or a copolymer. The present invention relates to a method for producing a heat-sealable interlining fiber sheet that is adhered or adhered to the surface.

Recently, the demand for clothing has become more comfortable, and in terms of silhouette, fibers are becoming finer and woven fabrics are becoming thinner.The interlining used is also soft and light, and sewn items are made of adhesive that will not lose their shape. has become required.

The interlining used for this adhesive interlining is made by spinning a heat-sealable polymer onto a non-woven fabric in the form of continuous filaments and adhering them at their intersections while having adhesive properties to form a spider-like sheet. However, in this manufacturing method, melt-extruded filaments are drawn into continuous filaments using undisturbed parallel airflow, and the spider-like particles of continuous filaments collected on the fiber sheet are uniformly dispersed. The chipping and fineness are relatively large, and fineness can be achieved by increasing the speed of air flow or increasing the resin temperature, but this is due to the use of heat-sealing resin with a melting point of 150°C or less. Since the crystallinity of the resin is low, it easily breaks during drawing, and there is a limit to the fineness of continuous filaments, and it has been difficult to stably and continuously spin filaments with a fineness of 5 deniers or less. Therefore, the above-mentioned spider web-like interlining material is particularly suitable for fabrics that are likely to bleed into the fabric, especially at 100 y/min.
Since the adhesive core having a fineness of 7-rl' or less was not fully satisfactory, an adhesive core having a finer fineness was required. The present invention has been developed in view of the above-mentioned drawbacks, and eliminates the above-mentioned drawbacks by melting and adhering at as low a temperature and pressure as possible during the sewing process, so that the entire constituent fibers of the thermoadhesive material contribute to adhesion without waste, and the resin The present invention provides a method for producing a heat-sealable and air permeable fiber sheet for interlining, which has a heat-sealable, air-permeable thin layer of heat-sealable short fibers with a fine fineness distribution and a uniform distribution on the surface layer without bleeding.

That is, a melt of a polymer or copolymer resin with a melting point of 110'C or a softening point of 50C or more is extruded through a number of adjacent spinning nozzles arranged in a straight line, and the melt is extruded on both sides of the same plane of each spinning nozzle. 300-6 to the center line of the spinning nozzle
A high-speed gas stream is blown onto the extruded melt from the gas stream jet holes arranged discontinuously at an angle of 0.00 so as to intersect with each other within 10 mm directly below the tip of the spinning hole, and the formed short fibers with fine fineness are placed at the bottom. The present invention provides a method for manufacturing a heat-sealable fiber sheet for interlining, which is deposited in a thin layer on a breathable fiber sheet on a conveyor with a built-in suction device. Next, the present invention will be explained with reference to the drawings.

In Fig. 1, a heat-fusible polymer or copolymer with a melting point of 110°C or a softening point of 50°C or more supplied from a hopper 1 is melted in an extruder 2, passed through a conduit 3, and then spun into a spinning material with a built-in heater. It enters the spinneret 4 and is extruded through the spinning hole 5 at a constant pressure, and the extrusion temperature is maintained at a temperature 20 to 50° C. higher than the melting point of the polymer.

As shown in Figure 2, a large number of spinning holes with diameters of 0.1 to 0.5 mm are provided in a row at regular intervals of 2 to 10 nm, and independent holes or holes are located symmetrically on both sides of the spinning holes. A slit with a constant width is provided as a gas flow jetting hole 6. The details of the spinning hole are as shown in Fig. 3. There is a spinning hole 5 at the tip of the molten resin conduit 13, and a gas having a diameter of 0.1 to 0.5u is usually placed at symmetrical positions on the left and right sides on the same plane as the spinning hole 5. flow jet hole 6
are arranged at a constant angle θ so that perpendicular lines C and C' on the same extended line drawn downward from each spout hole intersect at a distance 1 of 1 to 10 nm directly below the centerline tip b of the spinning hole. There is. The arrangement angle θ of the gas flow nozzle is set between approximately 30° and 60° in view of the uniform dispersion and spread of the sachet short fibers, and the center point b of the spinning hole and the center of the gas flow nozzle at this time are The distance between points e or d is 2 to 10n. The heat-fusible polymer or copolymer resin discharged from the spinneret having the above structure includes modified polyolefin resins, modified polyester resins, modified products such as acrylic, epoxy, and polyvinyl alcohol resins, and polyamide copolymers. Use an appropriate resin or the like. A gas flow, such as air, steam, nitrogen gas, etc., introduced from the gas flow introduction pipe 7 and adjusted to a temperature of 300°C or less is injected from a pair of left and right jet holes, and intersects within 10n of the tip of the spinning hole to form a turbulent region. At the same time, the extruded melt is captured and finely divided to form a large number of fine short fiber groups 8 with an average diameter of 0.1 to 2 μm. Heat-sealable fibers are accumulated in a uniform thin layer having a weight of 1 to 35 f7/d and integrally adhered to the air-permeable fiber sheet 9 fed from one end of the porous conveyor 11 containing a built-in suction device 12. It forms a fiber sheet for interlining.The above-mentioned breathable fiber sheet may be a plain cotton core, wool core, hemp core, etc. with a basis weight of 100 to 200 V/d, or a parallel fiber sheet with a basis weight of 15 to 150 V/d. A flexible and elastic nonwoven fabric having a fiber arrangement, a random fiber arrangement, or a laminated structure of both is used.Next, an embodiment of the present invention will be described.

EXAMPLE A nylon copolymer resin having a melting point of 120° C. is melted in an extruder and introduced into a spinneret.

The temperature of the spinning hole of the spinneret is maintained at 140°C, and the spinning hole has 100 holes with a diameter of 0.4uφ lined up in a straight line at intervals of 10n, and a gas with a diameter of 0.31φ is placed on both left and right sides on the same plane as the spinning hole. A pair of 100 flow nozzles are arranged in each pair, and the distance from the center of the tip of the spinning hole to the intersection on the extended line of the left and right gas flow nozzles is 15 mm, and the distance between the spinning hole and the gas flow nozzle is b-E. Using a spinneret with b-d set to 51 and the inclination angle θ of the gas flow nozzle to 45°, hot air at a temperature of 160°C and a pressure of 3 kg/Cd was injected from the gas flow nozzle and turbulent immediately below the spinning hole. A flow area is formed to capture the linear melt extruded from the spinning hole to form fine fine short fibers with a thickness of 0.1 to 2 μm and scatter them downward. The fibers were uniformly collected and deposited at a weight of 20 V/d onto a hemp core weighing 80 f7/m' that was fed out from one end of a wire mesh conveyor equipped with a suction device and running at a speed of 3 m/-, located 50 degrees below the spinneret. Product weight: 1, which has a heat-sealable short fiber layer with fine fineness.
A heat-sealable interlining fiber sheet material of 00V/7Ft' was formed. As described above, according to the present invention, gas flow jetting holes are provided on both left and right sides on the same plane as the spinning hole, so that the gas flow jetted from the gas jetting holes intersects within 1 to 10 nm directly below the spinning hole. By using a spinneret in which the gas flow nozzle is arranged at an angle of 30° to 60° with respect to the center line of Since the distance (d-°, e-o) between the tips D, e and the gas flow cross-extruded linear body capture point o is shortened, short fibers with finer fineness are formed, and therefore finer fibers with thermal adhesive properties are formed. Fineness short fibers are evenly dispersed and collected on the breathable fiber sheet that serves as the core material, so even if the amount of spraying is very small (I
V/m') A heat-sealing layer with uniform dispersion is obtained, the number of fibers per single area is large and the distribution is uniform, all fibers effectively contribute to adhesive strength, and a small amount of spraying produces a large adhesive effect. A heat-fusible interlining for shape-retaining clothing is obtained.

Even when laminated with thin fabrics with a basis weight of 80V/771″ or less, the texture of the fabric is not impaired and the resin does not ooze out.

Pressure and heating time using an iron or adhesive press machine can be shortened, and processing is easy. Suitable for adhering to fabrics that are prone to heat yellowing or heat shrinkage. Compared to the filament spinning method, this method has various effects such as being able to operate continuously and stably.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a heat-sealable interlining fiber sheet manufacturing apparatus according to an embodiment of the present invention, FIG. 2 is a partially cutaway plan view showing the spinning hole of the same spinneret, and FIG. FIG. 2 is an enlarged cross-sectional view of the main parts of the spinning hole and the gas flow jetting hole. 1...hopper, 2...extruder, 3...
... Conduit, 4 ... Spinneret, 5 ...
・Spinning hole, 6... Gas flow nozzle, T...
・Gas flow introduction pipe, 8...Fine fineness short fiber group, 9
... Breathable fiber sheet, 10 ... Heat-sealable fiber sheet, 11 ... Porous conveyor, 12 ... Suction device, 13 ... ...Melted resin conduit.

Claims (1)

[Claims] 1 A melt of a heat-sealable polymer or copolymer with a melting point of 110°C or a softening point of 50°C or higher is extruded into welded linear bodies through a number of adjacent spinning holes arranged in a straight line, and each spun yarn is A high-speed heated gas stream is applied to the extruded linear body so that it intersects within 10 mm directly below the tip of the spinning hole through the gas flow jetting holes arranged at an angle of 30° to 60° with respect to the center line of the spinning hole on the left and right sides on the same plane as the hole. While the fine-grained short fibers that are formed are sticky, they are collected in a uniform thin layer on a breathable fiber sheet that is fed out from one end of a collection porous conveyor that has a built-in suction device. A method for manufacturing a fiber sheet for interlining that can be heat-sealed and adhered.