JPH0130509B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to batting from the seams of products and bedding, etc. that use batting (referring to webs or cotton made of laminated long fibers or short fibers of synthetic fibers) or feathers (refers to fluff or feathers) as insulation materials. This invention relates to a method for preventing feathers from flying out. Conventionally, when sewing cold protection products containing batting or feathers (hereinafter abbreviated as batting, etc.) or bedding with a similar structure, ground stitching and quilt stitching are performed using cotton thread or synthetic spun thread as the sewing thread of the sewing machine. In this case, even though the fabric itself has been treated with eye-stops to prevent batting from flying out, the thread diameter is larger than the sewing thread thickness when the sewing machine hangs the fabric. A needle hole that is larger than that will be drilled. As a result, the batting etc. may fly out from the needle holes, causing problems such as getting caught on objects, pilling, impairing the appearance, and reducing heat retention performance. Conventionally, the conventional method for preventing the batting etc. from flying out is to cover the needle hole by applying resin liquid to the seam after sewing, but this method has low processing efficiency and also The material became hard, and deterioration of the texture was unavoidable. As described above, no method has yet been developed for imparting satisfactory properties to prevent batting from popping out at the seams without deteriorating the feel in the vicinity of the seams. The present invention solves these problems and provides a method for obtaining a sewn product that has a good texture near the seams and has sufficient properties to prevent batting from popping out at the seams. be. That is, in the present invention, when sewing a product containing batting or feathers, a part thereof is sewn with substantially one thread made of a low-temperature thermofusible polymer, and then heat-treated at a temperature higher than the melting point of the low-temperature thermofusible polymer. The present invention provides a method for preventing batting etc. from flying out from a seam portion. The present invention will be explained in detail below with reference to the drawings. In the present invention, when sewing products with padding etc., a part of the sewing thread is made of a low temperature thermofusible polymer (having a melting point of
Synthetic fibers with a temperature of 150℃ or less. ), but in a form where a low temperature thermofusible polymer is formed in a part of the sewing thread, a high temperature thermofusible polymer (component A) and a low temperature thermofusible polymer (component B) are used. ), and its cross-sectional shape shows the A-B two-layer structure as shown in Figures 1 and 2, and the A-B two-layer structure as shown in Figure 3, when the B component is indicated by diagonal lines. B-A-B three-layer structure, 4th
A concentric core-sheath structure in which the A component is the core and the B component is the sheath as shown in the figure, and the B component is divided into multiple regions and exposed or protrudes from the fiber surface as shown in FIG. The weight ratio of component A and component B is preferably 80:20 to 20:80. In the method of the present invention, sewing is performed using the sewing thread as described above, but the effects of the present invention can be obtained if the sewing thread is used as at least one of the upper thread and lower thread of the sewing machine during sewing. Naturally, the effect of popping out batting etc. is greatest when all sewing threads such as upper thread and bobbin thread are used, but in general, sufficient effect can be obtained by using only the bobbin thread, and the sewing Since the bobbin thread is the least susceptible to frictional resistance, it is most ideal to use a sewing thread containing a low-temperature thermofusible polymer as the bobbin thread, which is reasonable and causes fewer troubles during sewing. Next, the sewn product is heat-treated at a temperature higher than the melting point of the low-temperature thermofusible polymer in the sewing thread. At this time, the low-temperature thermofusible polymer melts and seals the needle holes created during sewing, preventing batting etc. from flying out. The effect is extremely good. Heat treatment only requires that the low-temperature thermofusible polymer undergoes heat treatment, so heat treatment can be applied only to the seams by methods such as ironing, or heat rollers or heat plates can be applied to the feed section of the sewing machine during sewing. , heat treatment may be performed using a heating means such as hot air, but since the form with padding etc. has a bulge, it is rational to heat treat it by placing it in a heat treatment machine in order to maintain the stability of the form. be. The method of the present invention has the above-mentioned configuration, and not only can the method of the present invention extremely easily improve the property of preventing batting, etc. from flying out from the seams of a product containing batting, etc., but also the heat-fusible polymer can Since only a very small amount is used in the seams, an ideal sewn product can be obtained without damaging the feel of the product near the seams. Examples will be given and explained below. Example 1 A nylon fabric that was subjected to a blinding process using a heated roller was prepared as a material to be sewn. The sewing thread has a fiber cross section shown in Figure 1, and consists of a polyamide polymer (component A) with a melting point of 225°C and a polyamide polymer (component B) with a melting point of 120°C, with a weight ratio of A and B of 70:30.
Using 340 denier/24 filament composite fiber as the lower thread and No. 50 ester spun yarn as the upper thread, we made a 250g feather jacket using the above fabric.
Sewing was carried out under the conditions shown in the table.

[Table] Next, the jacket was dried in a hot air dryer at 130℃ for 10 minutes.
The low-temperature thermofusible polymer was thermally bonded by heat treatment for a minute. The results of the wearing test for this jacket are shown in the second
Shown in the table. For comparison, one was sewn under the same sewing conditions as Example 1 using a bobbin thread that does not contain a low-temperature thermofusible polymer (Comparative Example 1), and the other was sewn in Comparative Example 1 with the seams sealed with resin liquid. (Comparative Example 2) was prepared, and a wear test was conducted in the same manner as in Example 1. The results are also shown in Table 2. Next, start from part of the jacket and pull it 20cm so that the quilt seam is in the center.
After cutting into pieces of cm x 20 cm, piping stitch the cut ends with coated nylon fabric.
Only the seam portion was sealed with a resin solution to prepare a sample piece. After cleaning the surface of the specimen, JISL
-1076 ICI type pilling tester for 10 hours.
Table 3 shows the number of feather pieces with a total length of 5 mm or more that protruded from the test piece. As is clear from the results in Tables 2 and 3, the ability to prevent feathers from popping out at the seam area according to the present invention is extremely good, and there is almost no change in the texture of the seam area, indicating a satisfactory texture. Ta.

【table】

[Table] Example 2 20cm x 20 using the fabric, sewing thread and sewing conditions of Example 1
A bag with a diameter of 1.5 cm was prepared, and 10 g of ester cotton having a single yarn of 10 denier and a cut length of 60 mm was placed in the bag and the bag was closed.
Next, the bag was sewn with quilt stitches at intervals of about 6 cm in the vertical and horizontal directions, and then ironed with an iron adjusted to 130°C to thermally fuse the low-temperature heat-melting polymer to obtain sample pieces. Table 4 shows the number of pieces of ester cotton protruding from the seam after the sample piece was treated in the same manner as in Example 1 using a pilling tester.
For comparison, we prepared a sample (Comparative Example 3) that was sewn using a bobbin thread that did not contain a low-temperature thermofusible polymer, but otherwise under the same conditions as Example 2, and treated with a pilling tester in the same manner as the previous example. It is shown in Table 4. As is clear from Table 4, the results showed that the method of the present invention had a good ability to prevent the batting from popping out from the seam.

【table】 [Brief explanation of drawings]

1 to 5 all show cross-sectional views of the fibers of the sewing thread used in the method of the present invention. A...High temperature heat melting polymer, B...Low temperature heat melting polymer.

Claims (1)

[Scope of Claims] 1. When sewing products containing batting or feathers, a part of the product is sewn with substantially one sewing thread made of a low-temperature thermofusible polymer, and then the product is sewn at a temperature equal to or higher than the melting point of the low-temperature thermofusible polymer. A method for preventing batting or feathers from coming out from a seam portion, the method comprising performing heat treatment at a seam. 2 The sewing thread is made of two components: a high temperature thermofusible polymer (component A) and a low temperature thermofusible polymer (component B), and the cross-sectional shape of the fiber is a two-layer structure of A-B, or a three-layer structure of B-A-B. A method for preventing batting or feathers from popping out from a seam according to claim 1, which is made of a composite fiber having a layered structure or a concentric core-sheath structure in which A is the core and B is the sheath. .