JPS60246835A - Use in fabrication of new yarn and cloth product - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field] The present invention broadly relates to cloth products, and more particularly relates to sewing thread, sewing techniques using this thread, and sewn products manufactured using this thread, and is applied to the textile industry. It is something.

[Conventional technology]

Many variations of stitches are used in the textile industry. Lock stitch (1ock 5titch) is designed to prevent the chain of stitches from unraveling if the thread breaks at some point along the seam. Lockstitch has an inherent drawback in that it can only be formed by a sewing machine using a bobbin.

Because the bobbin is limited to relatively short lengths of thread, the bobbin must be replaced frequently, and replacement currently requires the attention of the operator. Lockstitch is therefore not suitable for automated driving, where the care of a casual driver is obviated.

An alternative to lock stitch, which has the advantage of not having to use a bobbin, is chain stitch. This type of stitch is very suitable for automated driving, but
However, it has the inherent disadvantage that the seam will unravel if one or more threads are cut.

German Published Application No. 31 42 507 discloses a yarn comprising a bundle of single yarns held together by an adhesive applied to the outer surface of the strand from a discharge channel.

[Summary of the invention]

The present invention aims to solve the problem of unraveling that frequently occurs with conventional chain stitched textile products. According to one embodiment of the invention, therefore, - a sewing thread made from a plurality of single threads twisted together, at least one of the plurality of single threads exhibiting adhesive properties upon heat treatment; made of a thermoplastic material, and the plurality of filaments are twisted such that the at least one filament of thermoplastic material is exposed to the outside of the strands by the twist configuration;
The thermoplastic material remains substantially unadhered prior to sewing.

Further, according to one embodiment of the invention, the single thread made of thermoplastic material can be a monofilament.

Moreover, according to one embodiment of the invention, the filament made of thermoplastic material can also be a yarn containing adhesive fibers.

According to another embodiment of the invention, the single yarn made of thermoplastic material can also be a multifilament yarn.

In addition, in accordance with one embodiment of the present invention, there is provided a sewing method that includes sewing a fibrous material with a strand made of a plurality of single strands twisted together, wherein a few of the plurality of single strands are twisted together. Both yarns are made of a thermoplastic material that becomes adhesive when it is heat treated, and the yarns are plied and twisted such that the yarns made of thermoplastic material are exposed on the outside of the plied yarns. , and causes the sewn textile material to form an adhesive to the thermoplastic material at the thread location, thereby bonding the sewing thread to the sewing material at the intersection point, thereby ensuring sufficient bonding between the sewing material and the thread. Apply heat to create a strong bond.

Further, according to the method described above, the sewing procedure can also include sewing with a chain stitch.

Moreover, according to one embodiment of the invention, a sewing thread is used in which a plurality of single threads are twisted together, at least one of which is made of a thermoplastic material that develops adhesive properties upon heat treatment thereof. An article is provided that includes a sewn portion, and the plied yarn is twisted such that at least one single strand of thermoplastic material is exposed on the outside of the plied yarn due to the twisted configuration, and the thermoplastic material is sewn. The front remains in a substantially non-adhesive configuration.

Moreover, according to one embodiment of the present invention, a strand is formed by twisting together a plurality of single strands, at least one of which is made of a thermoplastic material that develops adhesive properties upon heat treatment. An article is provided having a sewn portion formed by sewing the sheath material using a needle, and the plurality of filaments are twisted such that the filaments made of thermoplastic material are exposed on the outside of the strands; and then press the thermoplastic material into adhesive form,
Heat is thereby applied to the sewn sheath material at the point of engagement of the strands and the sheath material to cause the sewn strands to adhere at the intersections with the sewing material.

〔Example〕

Normal chain stitch (chain 5titch)
), the chain stitch shown in FIG. 1 is "Federal Stitch Type 101" (F
This corresponds to what is called ederal 5titch Type 101). Such stitches are formed with a single thread drawn from a large spool or cone normally mounted on the sewing machine. The sewing needle pokes a loop of thread through the fabric, and also a "looper" (1 loop).
er ) and in this way a chain of intertwined loops is formed.

In FIG. 1, 1 and 2 are the top and bottom portions (surfaces) of the stitch, respectively. The base 2 consists of a plurality of loops, each held by one on the left-hand side and one on the right-hand side, and in this way a chain stitch is formed.

Chain stitch has the advantage that all threads are supplied from a readily visible thread supply so that timely replacement of exhausted spools or cones is guaranteed. Furthermore, the thread supply is usually from a large cone or spool that accommodates a large number of supply systems.

Chain stitches, however, have the disadvantage that the stitches are easily tl-displaced so that the stitches are completely incised even if the thread is cut at only one point. For example, if the thread is cut at line 4, the loops will be opened at 5, and if the thread is pulled at 6, the loops of each stitch will be opened in turn successively until all stitches are opened.

Another important variant chain stitch is the 2 heather thread chain stitch, Federal Stetteig 401 (Fed
One example is shown in FIG. 2, known as the Eral 5titch Type 401). In this case two threads are fed from a large cone on the sewing machine. 1
The main thread is poked through the fabric by the sewing needle from above the loop being made under the fabric, the second thread is fed into the "loo-gu" under the fabric, and this looper Pierce a loop of Roux i4-type through the loop of the sewing needle to hold the stitch. In Figure 2, 7 and 8 are the top and bottom surfaces of the 2 heather chain stitch, respectively. The first thread is 9
and the second thread is indicated at 10.

This stitch also has the same disadvantage as that of FIG. 1 in that it unravels. So, for example, if the second thread is line 1
If it breaks at 1, the loop f13 will be released and the pull at 14 will unravel all the seams.

You will notice that multiple threads, needles, and loopers are used to obtain many variations of chain stitches. What are these variations, for example? Tongue attachment, blind stitching hem
, overcasting
) edges, and cover stitching
It has a special function in sewing, such as by attaching pieces of cloth with sewing. However, the basic principle stated above is a characteristic of this transformation.

1 typical lock stitch (1ock 5titch)
h) is shown in FIG. As shown, this is also a two-thread system with the top side made of the first yarn 16 and the bottom side made of the second yarn, both sides of which are made of vertical loops 19.
It is connected with. To form this stitch, the needle thread is supplied from a large spool or cone on the sewing machine;
The thread for the second male bottle is fed from a very small spool placed in the lower right sewing means.

Lock stitches are more stable than chain stitches because each stitch is closed and only one or two stitches are opened if the thread breaks.

However, is lock stitch a significant disadvantage? I need bottle thread. Accordingly? Bin thread is frequently consumed and must be replenished, causing considerable interruptions as both changing and winding new bobbins are time consuming operations. Furthermore, the Gevin thread, which is hidden from the operator, runs out randomly in the sewing opening. Therefore, if this occurs during sewing, the seams will require special treatment and re-sewing.

These problems, apart from being a considerable inconvenience to sewing machine operators, also pose a serious nuisance to automatic machinery.

Therefore, to summarize the prior art in terms of this one element, chain stitch has a great advantage in terms of manufacturing technology, but has the disadvantage of being easily unraveled, and lock stitch is more stable against unraveling. However, it is technically troublesome. Up to now, these problems have not been solved, and under these circumstances, it is up to the manufacturer to make a choice as to which one exhibits the least of the two disadvantages.

Is there a similar problem when sewing buttons? It also exists in tongue stitching and blind stitching, and therefore the broad object of the present invention is to provide a new thread for sewing and stitching that is adapted to overcome this unraveling problem.

In the following description and claims, sewing and stitching operations are referred to collectively as "fabric manufacturing and processing."

The adhesive material may be used in a stretched configuration in a variety of ways. Thus, in one embodiment, one or more filaments of adhesive material are included in a heating step together with a single yarn of conventional filaments or short fibers to create a construction according to the invention.

According to another embodiment, thermoplastic fibers are mixed into the base fibers of the yarn during the spinning process, producing a conventional type of yarn with adhesive fibers included between the base fibers of the yarn.

According to yet another embodiment, the adhesive fiber filaments are combined with conventional filaments in a plying and twisting process. For example, it is possible in this way to produce a yarn consisting of three single yarns, two of which are made of normal fibers and one of which is made of adhesive fibers, twisted together.

Such a thread can be seen in Figure 4. It can be clearly seen here that the adhesive filaments 20 are twisted together with two conventional non-adhesive filaments 22, 24, with the adhesive filaments being exposed on the outside of the yarn.

Figures 5A and 5B show how the yarn 26 of the present invention (Figure 4) appears in a chain stitch joining two pieces of fabric 28 and 30 before heat treatment and development of adhesive properties. Generally drawn. For the sake of clarity, the figures appearing in Figures 5A, 5B and 50 are only intended to display the threads and show the true appearance of the threads as they are viewed microscopically. It is pointed out that this does not mean that

In fact, due to the fact that there are a large number of respective free fiber ends attached to the thread, the appearance of the stitch is actually less distinct than shown, especially in its curved parts.

The present invention also includes methods of manufacturing and processing textiles to make textile products by using yarns as described and depicted above and by heat treating the manufactured textile products. FIG. 5C illustrates the chain stitch of FIG. 5B after heat treatment. The cross-hatched line indicates the adhesive leakage from the adhesive filament 20. The parts of the adhesive filament 20 adhere to each other in adjacent cases, such as in reference no. It is possible to estimate whether or not they will be bonded depending on the configuration.

During heat treatment, monofilament and yarn overlap (i
interlocking), interla
cing or intersecting
The parts are fused together at the point of contact, thereby preventing the thread from unraveling even if the thread is subsequently cut in one or more places.

Many thermoplastic and thermosetting materials can be used for the purposes of this invention, and those provided are compatible with the textile material, and their softening points are those at which the textile will not fail. Merely by way of example, mention may be made of copolyamides and copolyesters. A preferred embodiment of the present invention is a melt-fixable multifilament manufactured and sold by Grilon of Ems, Switzerland.
Use K115.

The present invention is illustrated in, but not limited to, the following examples - EXAMPLE A2 The double thread chain stitch thread joining the two pieces is made of thermoset fibers made from low melting point nylon. Single yarn and single polyester yarn twisted together. The seam is
This strand was passed through a sewing needle in a roux, and a regular sewing thread was passed through a sewing needle to form a 2-wire chain stitch (Federal Stitch Type (F, S, T,) 401-). The seam strength of the experimental yarn was stronger than a comparable seam sewn with regular thread. Moreover, regular seams unraveled with a thread tension of only 1 (l); seams ψ sewn with adhesive threads did not unravel.
When a load of 0.090 g was applied, the thread at the load point broke.

Example B: Waterproof Sewing of Waterproof Products A common problem encountered when textile constructs such as raincoats, tents and tarpaulins are exposed to rain or water is the penetration of water through the sewn seams.

The resistance of fabrics and seams to water penetration is determined by the 1974 British Standards Handbook Volume 11 (Br1tfshStand).
ards Handbook Volume 11)
Test Methods for Textiles, British Standards Institute, 1974, Section 4.2823, 1968 "Resistance of Textiles to Water Penetration #: Hydrostatic Head Test for Resistance to Water Penetration".

In the above test, the hydrostatic head of water is determined by e.g.
Applies to faces. The water head rises until water begins to penetrate the seam, and at this point water is considered the amount of seam resistance with respect to water penetration.

As depicted in Figure 6, heavy canvas ten) 40 is F, S,
T, 401 type stitch 42 is joined by normal lap stitching, and the stitches are usually made of cotton thread 70/2B with a sewing needle and two IOOd tex polyester threads and 11
It was formed by threading a yarn that was twisted together with an adhesive multifilament yarn of 0 dtex and passed through a loop.

After sewing, the seams were heated with a regular press iron to develop adhesive properties, and then tested to determine the head of water penetrating the seams. It withstood well up to the water head of the thread, but the seams sewn with regular thread were 20
I could only withstand 0 ma. This improvement in 52 stitches was due to the molten adhesive closing the gap between the thread, i.e. its loop, and the fabric.
ched Hem5) Thin Indian stitch is basically a one-thread chain stitch that is sewn from the back side of the fabric with a sewing needle that simply penetrates halfway through the fabric (FederalStltch
T')'pe 103) a Stitches therefore only appear on the back side of the fabric; the stitches are therefore not visible on the front side of the garment. Such a blind Stella φ has a great visual advantage on the surface of the garment.

According to conventional technology, however, such blind-stitched seams are chain stitches and therefore the seams often unravel.

In the example depicted in Figure 7, the hem 50 is one 100 dt,
11 of ex polyester yarn and adhesive multifilament
It is sewn with a thread made by plying and twisting one of the 0dtex threads.

After sewing, adhesion was developed by normal Sores heating. The same seams sewn with regular thread came undone easily;
The adhesive threads could not be unraveled.

Example D: Attaching butane using a single thread chain stitch is common; buttons sewn to fabric with a chain stitch often fall off the garment due to unraveling of the chain of the stitch. As shown in FIG. 8, butane 60 has two 10
0 d tax polyester thread and one 110 d t
Each fabric 62 is chain-stitched with a thread 64 which is made by twisting together an ex-adhesive multifilament thread into a single thread.

After sewing, the adhesiveness was developed by heating and it became impossible to undo the stitches.

Those skilled in the art will appreciate that the invention is not limited to what has been particularly described and illustrated. The present invention,
The scope of should be limited only by the claims.

[Brief explanation of the drawing]

FIG. 1 shows a one-thread chain stitch. Figure 2 shows a two-thread chain stitch. Figure 3 shows lock stitch. FIG. 4 is a side view of the sewing thread of the present invention. FIGS. 5A and 5B are enlarged views of the side and bottom surfaces of a chain stitch formed with a sewing thread according to the present invention before heat treatment. FIG. 5C is a bottom view of the chain stitch of FIG. 4B after heat treatment. FIG. 6 is a perspective view of stitch sewing according to an embodiment of the present invention. FIG. 7 is a perspective view of a blind stitch hem according to an embodiment of the invention. FIG. 8 is a side sectional view showing butane attached to a fabric according to an embodiment of the present invention. 20... Adhesive single thread, 22.24... Non-adhesive single thread, 26... Combined twisted sewing thread, 28.30... Cloth, 40...
・Heavy canvas tent, 50...heme, 60...butane. Engraving of the drawings (no changes to the contents) @+ Figure ＼ Shima 2 Figure Sato 3 Figure 5A Figure 6 Figure 5B @ 5C Figure 4:! Figure 66 Procedural Amendment (Method) June 2, 1985 Manabu Shiga, Commissioner of the Patent Office 1, Indication of the case 1985 Patent Application No. 32995 2, Name of the invention In the production of new yarn and cloth products Use 3, Relationship with the case of the person making the amendment Patent applicant name
Technology and Fashion 4, Agent address: 8-10-6 Toranomon-chome, Minato-ku, Tokyo 105
Subject of amendment (1) “Representative of applicant” column of application (2) Power of attorney (3) Specification (4) Drawings (5) Corporate certificate 7, contents of amendment (11 (2) (5) ) As attached (3) Engraving of the specification (no change in content) (4) Engraving of drawings (no change in content) 8. List of attached documents (11. 1 application for correction (2) 1 copy of power of attorney and translation 1 each) Road (3) Engraved specification 1 copy (4) Engraved drawing 1 copy (5) Corporate certificate and translation 1 copy each

Claims (1)

[Scope of Claims] 1. At least one of the plurality of single yarns is made of a thermoplastic material that develops adhesive ability by heat treatment, and the plurality of single yarns are made of a twisted thermoplastic material. Formed by plying and twisting a plurality of single yarns, characterized in that the thermoplastic material is maintained in a substantially non-adhesive form before sewing. sewn thread. 2. The sewing thread according to claim 1, wherein the single thread made of a thermoplastic material consists of heptanofilaments. 3. The sewing thread according to claim 1 or 2, wherein the single thread made of thermoplastic material comprises a thread containing adhesive fibers. 4. The sewing thread according to claim 1, wherein the single thread made of thermoplastic material is a multifilament thread. 5. At least one of the plurality of single yarns is made of a thermoplastic material that develops adhesive properties by heat treatment, and the core multiple single yarns are plied and twisted so that the thermoplastic yarn is exposed to the outside of the plied and twisted yarns. and applying heat to the sewn fabric at the site of engagement of the sewing thread with the fabric to bring the thermoplastic material into a fully adhesive state;
A sewing method comprising sewing a material with a thread formed by twisting a plurality of single threads, characterized in that the sewing thread is thereby sufficiently bonded into the sewing material at the intersection with the cloth material. 6. The sewing method according to claim 5, wherein the sewing process is performed by sewing with a chain stitch. 7. At least one of the plurality of single yarns is made of a thermoplastic material that develops adhesive ability by heat treatment, and the plurality of single yarns have at least one thermoplastic material on the outside of the plied yarn depending on the twisting form. A sewn article comprising a portion that is exposed and sewn with a suture formed of a plurality of single threads, the thermoplastic material remaining substantially non-adhesive prior to sewing. 8. At least one of the plurality of single yarns is made of a thermoplastic material that develops adhesive ability by heat treatment, and the plurality of single yarns are made of a thermoplastic material such that the yarn made of the thermoplastic material is exposed to the outside of the plied yarn. Heat is applied to the twisted and sewn fabric at the point of engagement of the thread with the fabric to bring the thermoplastic material into a fully adhesive state, thereby allowing the thread to connect to the fabric at the intersection point with the fabric. A sewn product having a sewn part formed by sewing a material with a plurality of single threads, which are sufficiently bonded into the sewing material. 9. The sewn product according to claim 7 or 8, wherein the thermoplastic material fills the gap between the thread, its loop, and the cloth when melted by heat treatment. 10. The sewn product according to claim 7 or 8, wherein the sewn portion includes blind stitch sewing. 11. The sewn product according to claim 7 or 8, wherein the sewn portion includes a button with chain stitching. 12. The sewn product according to claim 7 or 8, in which the sewn portion is chain stitched.