JPS602774A - Adhesion of heat weldable core cloth - 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 The present invention relates to a method of adhering thermoplastic resin to a heat-fusible interlining in which a thermoplastic resin is adhered in dots or areas on one side of a base fabric, and has a much stronger adhesive force than conventional methods. It has the characteristics of being able to provide the following.

Heat-fusible interlining has been used for a long time to make clothing, and its applications are wide-ranging, including coats, suits, pants, dress shirts, and more. Therefore, a wide range of fiber materials can be used, ranging from thin outer fabrics to thick outer fabrics. Depending on the application, requirements for adhesive strength may be extremely high.

For example, in the case of dress shirt tailoring, interlining made by thermally bonding thermoplastic resin in dots (dots) to one side of the base fabric, so-called top fuse interlining, is useful in maintaining the beauty of collars and cuffs. Since it is very effective, it is often used these days. When using this Top 7 used type interlining, a fairly high adhesive force is required to adhere the collar feathers and cuffs, and for this reason, research has been carried out on the type and amount of heat sealant used in the interlining. Even the shirt fabric, which is the fabric to which it is adhered, has been given a finish that takes into account its adhesion with the heat sealant.

The present invention does not require any special consideration as mentioned above to increase adhesive strength, and uses a conventional heat-fusible interlining and bonded fabric, but only by adding some innovations to the bonding method. This method also provides a way to obtain much stronger adhesion.

In other words, in the conventional method of bonding the heat-fusible interlining and the fabric to be bonded, pressurization was performed for several seconds at a temperature above the softening point of the adhesive.

In contrast, the method of the present invention involves pressing for a few seconds at a temperature above the softening point of the adhesive, cooling it, heat pressing again for a few seconds, and then cooling. - It is characterized by repeating the cooling process at least twice or more.

The reason why the method of the present invention exhibits stronger adhesion than the conventional method will be further explained in the case of a top fuse type interlining as follows.

First, in the conventional method, it takes a relatively long time, e.g., 10 to 20 seconds, to overlap the top fuse type interlining and the outer material and press and heat them. The agent is melted by heating and transferred to the outer material, where it is bonded. If this heating continues, the entire adhesive part reaches a sufficiently high temperature, the viscosity decreases, and the adhesive diffuses into the surrounding area other than the bonding point. When this diffusion percolation occurs, the amount of fusing agent present at the bonding point after bonding is relatively reduced, resulting in a decrease in adhesive strength.

On the other hand, according to the method of the present invention, the outer periphery of the dotted adhesive is melted and fused to the adhesive surface of the outer fabric during the initial pressurization and heating press. At this time, if the pressing time is shorter than that of the conventional method, the core of the fusing agent does not reach a high temperature, resulting in low fluidity and little diffusion of the fusing agent. Once cooled, the fusing agent solidifies.

Subsequently, when the second pressure/heat press is performed in the same manner, the peripheral part of the fusing agent melts again, and the fusing agent stays only in the vicinity of the local area where the outer fabric is bonded, and the entanglement between the fusing agent and the outer fabric fibers is prevented. proceed. Once the adhesive is cooled and then pressurized and heated again for the third time, the tangle between the adhesive and the outer fibers at the bonded local area will further increase.

Thus, according to the method of the present invention, the adhesive strength can be significantly increased because the adhesive can be sufficiently entangled with the outer fibers without diffusing or permeating to the outside of the adhesive area. Furthermore, by repeating cooling and pressurization/heat pressing, the adhesive strength will improve as long as there is enough room for the fusion agent and outer fibers to become entangled.

However, in conventional methods, in order to maintain high adhesive strength, it was often necessary to limit the type of finishing agent used on the outer material. For example, it has been difficult to use materials with high mold releasability, such as silicone-based finishing agents such as dimethylpolysiloxane, or fluororesin finishing agents that provide water and oil repellency as finishing agents for the outer material. On the other hand, according to the method of the present invention, it is possible to maintain extremely high adhesive strength regardless of the type of finishing agent, as will be clarified in the Examples described below. This is considered to be because the adhesive effect of the method of the present invention does not depend solely on surface fusion, but is largely due to the entanglement phenomenon between fibers and resin.

According to the present invention, it is possible to achieve excellent adhesion effects even when a processing agent other than silicone-based or fluorine-based processing agents exhibiting a mold release effect is used. According to the method of the present invention, when using a top fuse type interlining, there is no longer any special restriction on the type of finishing agent for the outer material of the adherend 63, and it is practical that the texture and performance can be freely selected. You can get huge benefits.

Note that when carrying out the method of the present invention, there are no particular restrictions on the materials that can be used for the outer material and the interlining material, and a wide range of materials can be selected and used. For example, cellulose fibers such as cotton, rayon, and cupro; animal fibers such as wool and silk; semi-synthetic fibers such as acetate, triacetate, and Promix; polyester, polyamide, polyacrylonitrile, polyvinyl alcohol, and polyurethane. It can be applied to interlinings and other fibrous materials made of materials such as synthetic fibers and other synthetic fibers, and the shape of such materials is not particularly limited, and may be in the form of spun threads, filament threads, etc. Furthermore, it is also possible to use a mixed material by blending, interweaving, or interlacing.

When carrying out the method of the present invention, conventionally used equipment can be used as is as the press iron used for the pressure/heat press. However, as a patch type device, it is equipped with a hot plate (of any material) that can pressurize and heat at a predetermined pressure and temperature.
It is preferable that the device be designed so that after the adhesive material is set, it can be easily pressurized and heated, and the adhesive material can be taken out easily.

Moreover, a continuous press machine can also be used, and in this case, a series of operations of heating, pressurizing, depressurizing, and cooling may be repeated two or more times. In the case of a continuous press, the adhesive material is usually transferred on a conveyor belt, and on the conveyor belt there is a preheating device, a pressure roller for temporary bonding, a heating device, a pressure device consisting of two rolls, and a cooling device. In the case of the present invention, the adhesive material may pass through this device more than once.

Examples of such continuous press machines include the Colmaster machine manufactured by Kanegieser AG, West Germany, and the Auto User EM manufactured by Inou Co., Ltd.

-1. In order to carry out the method of the present invention more efficiently in a continuous manner, a series of units starting from the preheating device described above must be arranged in series in the necessary number of two or more units on the same conveyor. [
i' Just use a busy press.

The detailed implementation conditions of the method of the present invention will be specifically explained in the Examples below, but generally speaking, the hot plate temperature of the press tag is The temperature is set at a temperature higher than the softening point of the resin and lower than the decomposition temperature of the resin, for example, several degrees to several tens of degrees below the softening point, and the press pressure is about the pressure normally used for this purpose or slightly higher. For example, set the pressure to 0.05 to 0.05 skg/d (per unit area of the press plate), and set the pressing time to be much shorter than in the conventional method, for example, about 3 to 10 seconds, so that the adhesive surface of the interlining and the outer material are Align the surfaces to be adhered, 1
Perform double pressure bonding. Thereafter, the adhesive sample is once cooled to a temperature below the softening temperature of the thermoplastic resin used as a fusion agent, and then pressed again for a second time. The above operation can be repeated a third time or more depending on the desired adhesive strength.

The hot plate setting temperature depends on the type of adhesive used, and
It varies considerably depending on the material and thickness of the outer material, but for example, polyamide type is 80°C - 180°C, polyester type is 100°C - 180°C, polyalkylene type is 1200°C - 200°C. , 80℃~150℃ for ethylene vinyl acetate copolymer type
°C1 and 70°G-150°C in the case of heat-melting phenolic resin type.

It is appropriate that the press pressure be the same as or slightly higher than that of the conventional method, and can usually be set to 0.5 to 5 to 9/cd.

When using the method of the present invention, the pressing time is 1 compared to the conventional method.
It is better to set a shorter time per session, compared to the conventional method of 20
It is possible to appropriately select between 100% and 100%. For example, what was done once in 15 seconds using the conventional method,
This may be done twice for 7.5 seconds or three times for 3.0 to 50 seconds.

However, when there is an industrial issue such as when adhering shirt collars or cuffs, it is possible to reduce the impact on efficiency by setting the total time of each divided press to be shorter than the conventional one-time press. Preferably, even if the total pressing time is shortened in this way, there is an advantage in that a sufficiently high adhesive force can be obtained in the case of the "no-explosion" method.

When the method of the present invention is implemented, the interlining material with the greatest improvement in adhesion Q compared to when using the conventional adhesion method is:
As is clear from the above-mentioned mechanism of effect expression, this is a so-called top fuse type interlining, that is, one in which a fusing agent is applied in dots on the surface of the interlining. however,
A similar improvement effect is also observed in the case of interlinings in which the adhesive is adhered to the entire adhesive surface of the interlining. Note that there are no particular restrictions on the distribution of the fusing agent in the point bonding type top fuse interlining that is particularly effective in the method of the present invention. There is no particular limit to the number of meshes (the number of rows and columns between 2.54 cm of adhesive dots).

The general value of the mesh number is 10 to 50 meshes/254-. Further, there is no particular restriction on the amount of the fusion agent attached to the interlining fabric, and the amount used in conventional methods may be used as is. Typical usage levels vary depending on the type of fusing agent, but are usually sg/ze~50F/
/m”.

In addition, in the conventional method, pressure and heat pressing are performed for a relatively long period of time, so when a thin fabric is used and adhered to the outer fabric, the adhesive oozes out onto the surface of the outer fabric and stains the hot plate of the press machine. or glue the surface of the cloth. However, according to the method of the present invention, pressure/heating and cooling are repeated over a relatively short period of time, so it is possible to prevent the adhesive from seeping out or staining the adhesive fabric. Another great advantage of the method of the invention is that it does not occur.

The type of fusing agent for heat-sealing interlining that can be used in the method of the present invention is not limited, and any fusing agent used in conventional methods can be applied, but the following types are generally used: .

Examples include polyamide resins, polyamide copolymer resins, polyester resins, polyester copolymer resins, high-density polyethylene resins, low-density polyethylene resins, ethylene-vinyl acetate copolymer resins, hot-melt phenol resins, and the like.

The method of the present invention will be explained in more detail below using Examples.

Example 1 65% polyester, 35 cotton yarn blend, 45 count thread, warp 1
40/254 weft x 72 weft/2.54 plain woven fabric,
It was subjected to hair burning, desizing, scouring, grading, mercerization, and then whitening using a thermosol method using a dispersed fluorescent dye for polyester. After that, this fabric was treated with 100F of a commercially available glyoxal type reactive resin (Beccamin LFY, manufactured by Dainippon Ink), 20 g of a magnesium chloride type catalyst (Catalyst M, manufactured by Dainippon Ink), and a polyethylene softener ( Meikatex PEN, manufactured by Meisei Chemical) 20g1
Modified polyester type antifouling agent (Permalose TM
, manufactured by IC1, UK) 10 g and nonionic surfactant (Score Roll 400, manufactured by Kako Atlas) 2! Dilute i with water and get 1000m/! The pad (
Liquid adhesion 70%), drying (70°C x 3 minutes in air drying oven)
, heat treatment (open at 150°C for 3 minutes) was performed sequentially,
This was used as the outer material.

On the other hand, after processing a plain woven fabric of 65% polyester, cotton'35 blend, 23 count yarn, warp 64/254α x weft 52/2540 in the same process as the outer material, it is made with a high density melt index of 9 (1600C). A dot-like coating treatment was applied using polyethylene resin powder at a coating weight of 251/@ in 30 meshes to obtain a top fuse type interlining.

The outer material and the interlining were pressed under the pressure and heating conditions according to the method of the present invention and the pressure and heating conditions according to the conventional method as shown in Table 1 below to prepare laminated samples. In the case of the method of the present invention, after the first pressure/heat press is performed, the bonded sample is removed from the press surface, the temperature is lowered to below the softening point of the adhesive, and then the second press is performed. The same process was performed.

The press machine is Kobe Electric's top fuse press machine TOP.
-3560-8T type was used. For these bonded samples, peel test pieces were prepared according to JIS L1089-1970, and the peel strength was measured. Test conditions: 5 CTrL spacing, tensile rate 10 α/min, peel length SZ>. The results are also shown in Table 1.

Table 1 As is clear from the peel strength measurement results in Table 1 above, the method of the present invention provides an adhesive strength 15 to 2 times greater than that of the conventional method in which pressing is performed once.

Example 2 A generally commercially available glyoxal-type reactive resin (Beccamin LFY) 5011. Magnesium chloride type catalyst (catalyst n) Add and dilute with water to 1000
Using the processing liquid called rnl, the pad (liquid adhesion 70%
), drying (70°C x 3 minutes in an air drying oven), heat treatment (
(in an oven at 150°C for 4 minutes), and this was used as the outer material.

These outer materials were pressed onto the same top fuse type interlining as in Example 1 under the pressure and heating conditions according to the method of the present invention and the pressurization and heating conditions according to the conventional method as shown in Table 2 below to prepare laminated samples. . Table 2 shows the results of measuring the peel strength of these laminated samples.

\8. As shown in the peel strength in Table 2, even if the surface material is finished with a releasable finish, extremely strong adhesive strength can be obtained by the method of the present invention.

Example 3 The outer material was a thin shirt fabric made of 65φ polyester, 35-inch cotton blend, 50-count voile yarn, 96 warps x 882 threads, and a permanent press finish.
Lamination was carried out using the same top fuse type interlining as used in Table 3 under the pressure and heat conditions according to the present invention and the conventional pressure and heat conditions shown in Table 3 below.

A flat plate press similar to that in Example 1 was used as the press.

Observe whether there is a phenomenon in which the resin blows out from the outer fabric after the lamination operation and the adhesive stains the hot plate through the outer fabric.When this occurs, it significantly reduces work efficiency and impairs the aesthetic appearance of the surface of the laminated fabric. did. Furthermore, the results of the bonding test are shown in Table 3.

As shown in the results in Table 3, according to the method of the present invention, the peel strength was significantly improved even on thin shirt fabrics, and there was no resin blowout phenomenon at all.

This example shows that the method of the present invention makes it possible to bond thin fabrics, which are impractical in the conventional method due to two reasons: insufficient adhesive strength and occurrence of resin blow-out.

Example 4 A polyester/cotton blend plain woven fabric processed in the same manner as in Example 1 was used as the outer material, and Example 1 was used as the top fuse type interlining.
Tart index 20 (160
Adhesion amount is 201 using medium density polyethylene powder (℃)!
A dot-shaped coating treatment was applied to 30 meshes at a ratio of 30 meshes/m, and laminated samples were prepared by the method of the present invention shown in Table 4 and the conventional method.

The peel strength of these samples was measured, and the presence or absence of resin blowing was examined, and the results shown in Table 4 were obtained.

From these results, the method of the present invention shows superior adhesive strength than the conventional method even for interlinings using a fusing agent with a melt index of 20, which has relatively high fluidity when heated. It can be seen that even with a highly adhesive adhesive, there is no resin blow-out 7, and a good bonding effect can be obtained.

Example 5 A plain gauze cloth of 65% polyester, Ig 35φ blend, 57 warps/254 wefts, 56 threads/2.54 a.
ex2Pz melt index 20 (160°C) Swiss company Mser v.) at 8 g/n? at a rate of 2
A dot-shaped coating is applied to the 0 mesh to create a top fuse interlining.

The same outer material used in Example 1 and the interlining using the polyamide adhesive were pressed under pressure and heating according to the method of the present invention shown in Table 5 below under the conditions of the conventional method to 0.0%, and a laminated sample was obtained. A sample was prepared and the peeling strength was measured in the same manner.

Table 5 As is clear from the measured values of peel strength in Table 5, even in the case of polyamide adhesive interlining, the method of the present invention greatly improves the peel strength rlJJ/c compared to the conventional method.

Claims (1)

[Claims] In a method of bonding another fiber material to a heat-fusible interlining in which a thermoplastic resin is adhered to one side of a base fabric in dots or areas, at a temperature equal to or higher than the softening point of the heat-fusible adhesive of the interlining, An adhesion method characterized by repeating at least twice a series of steps of pressurizing and heating the combination of the heat-fusible interlining and the other fibrous material, and then depressurizing and cooling the combination.