JPS61681A - Apparatus for producing dot type adhesive core dot clothing - 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 an apparatus for manufacturing dot-shaped adhesive interlining for clothing.

Technical background of the invention and its problems Conventionally, as methods for producing dot-type adhesive interlining for clothing, there have been the intaglio printing method as shown in Fig. 7 and the 0-tallice freak printing method as shown in Fig. 8. Although it is known,
The former method does not allow the use of heat-sensitive cloths because it requires heating the cloth <1) with a heat source (a) and a heating furnace (-); In order to fill the hot-melt adhesive, the resin must be processed into fine powder, which increases the processing cost, and it is necessary to heat the dot-coated cloth (C) to melt and solidify the resin. Because of this, there are disadvantages such as increased consumption of thermal energy when combined with the use of heat energy (-); Since the mixed paste of resin and glue is transfer-coated onto the fabric (F) in dots through a screen <1), the quality of the resin and ultimately the adhesive performance deteriorates, and the adhesive performance also deteriorates. If the amount of coating per unit area is increased in order to cover the area, when it is used for adhesion to reinforced parts of clothing, the feel of that part will become hard and the texture will be impaired.

In order to eliminate such drawbacks of the conventional method, the applicant first
We have developed and proposed a method in which a molten hot-melt adhesive is transferred and applied onto cloth in dots from inside a rotary screen (see, for example, Japanese Patent Application No. 58-64272). If this is followed, the drawbacks of the conventional technology can be wiped out, but
If the supply of molten adhesive is stopped and work is interrupted, the molten adhesive will cool and solidify in the supply pipe, and when restarting operation, it will take a long time to heat and melt the adhesive, which will reduce work efficiency. It turns out. Such problems can be solved, for example, by equipping the supply pipe with a heating device to prevent the adhesive from cooling and solidifying, but this would complicate the structure and require long periods of heating, which would require electricity. It consumes a large amount of adhesive, which is uneconomical, and also causes new problems such as deterioration of the quality of the adhesive due to prolonged heating. In addition, it is possible to replace the supply pipe with a spare every time work is interrupted, but such replacement work is not only extremely troublesome, but also requires a lot of effort to clean the inside of the removed supply pipe. Not a preferred solution.

The present invention has been made with the aim of solving such problems.

The present invention supplies a molten hot-melt adhesive into the rotary screen through a supply pipe that freely passes through the rotary screen in the axial direction, and transfers the adhesive in dots onto the cloth through the rotary screen. This is a coating type manufacturing device, and the supply pipe is equipped with a discharge port that allows the entire amount of molten adhesive remaining in the pipe to be discharged from the system when work is interrupted through a discharge port that can be opened when necessary. This invention relates to a manufacturing apparatus for dot-shaped adhesive interlining for clothing, characterized in that it is equipped with a piston-type extrusion device for extrusion and discharge.

An embodiment of the present invention will be described below based on the accompanying drawings.0 Figure 1 schematically shows the overall view of the apparatus of the present invention, which comprises a rotary screen (1), a rotary screen (1), A molten resin (hot melt adhesive) supply pipe (2) is freely inserted into the screen (1) in the axial direction, and a doctor knife (3) is vertically disposed downward from the lower end of the supply pipe (2). ) and the backup 0-rule (4) combined with the screen (1)
), and the shape, structure, support, driving means, etc. of the rotary screen (1) are completely the same as those of the conventional device shown in FIG. 8, and only the outline is shown in the figure.

When manufacturing the adhesive interlining, the cloth (5) is placed on a guide roll (
6) and (7), the adhesive is continuously supplied to pass between the rotary screen (1) and the backer roll (4), while the cash register: I (8) (hot melt adhesive) is in a molten state. Under the supply port (2a) of the supply pipe (2)
) is supplied into the rotary screen (1), and this supplied molten resin (8) is dot-shaped on the upper surface of the cloth (5) due to the joint action of the rotary screen (1) and the doctor knife (3). Transfer coated. in this case,
The supply speed of the cloth (5) should be approximately 25~(,Q'm/min), and the amount of coating per unit area of L/resin 8 and the number of dots per square meter should be approximately 100 m/min. ~
Approximately 20F and 200 to 1600 pieces are appropriate.

Various known hot-melt adhesives can be used as the resin. For example, polyamide-based adhesives are suitable because they have excellent washing resistance and drying resistance. In particular, the acid components of the copolyamide used in the Nordott method, namely adipic acid, azelaic acid, heptapacic acid,
Copolyamide obtained by replacing at least one of dodacanniic acid with timer acid alone or other adhesives used for general clothing interlining such as polyamide, polyester, polyethylene, ethylene-acetic acid copolymer to 15
If used in a proportion of about 50%, the screen will pass through easily and a good interlining material will be obtained.

The timer acid referred to herein is a dibasic acid having 36 carbon atoms obtained by thermally polymerizing unsaturated fatty acids such as oleic acid and linoleic acid; hydrogenated timer acid may also be used. Examples of such copolyamides include the following.

■Polyamide of hemethylene tyamine and timer acid■Polyamide of hemethylene tyamine and dodecanedioic acid■Copolyamide made of nylon 6 [Example 2] ■Polyamide of hesamethylene tyamine and timer acid■ 6 Nylon ■ I2 Ny0:J Copolymer polyamide [Example 3] Various polyamides such as binary copolymers of azizic acid and hemethylene tyamine and timer acid and hesamethylene tyamine. The properties are as shown in Table 1.

Table 1 In order to maintain the molten state of the gin (8) in the rotary screen (1), the screen (1)
It is advantageous to heat the resin to a temperature of about 30 to 80 degrees higher than the melting point of the resin. For example, if the melting point of the resin (ring and ball method) is about 128 degrees Celsius, it is advantageous to heat it to a temperature of about 180 to 200 degrees Celsius. It is best to keep it heated.

The molten resin (8) usually has a fairly high viscosity of 20,000 tons or more, so the cloth (5)
When the rotary screen (1) is peeled off, the thread is pulled at each dot, and as shown in Fig. 3, each dot (8a) continues to pull the thread (8b) and the cloth (
5) will be transfer coated.

In the present invention, in order to solve such a problem, an injector (9) of gas, for example, air, is disposed near the front (fabric 1 side) of the rotary screen (1), and the injector (9)
The slit-like mouthpiece (9a) of the sprayer is directed toward the location where the cloth (5) begins to peel off from the screen (1), and is sprayed over the entire width of the screen. This injected air functions as a cutter and prevents stringing of the molten resin at the part where the cloth (5) is removed, resulting in a string-free dot (8a) as shown in FIG.
) enables transfer coating.

The structure of the injection device (9) is not particularly limited as long as it can inject gas such as air toward the cloth peeling part and over the gold mine so as to function as a cutter, but from the viewpoint of performance as an air cutter, In other words, it is advantageous for the vertical width of the slit of the nozzle to be as small as possible, for example 0.
．． 5-2. The vertical width can be set to about Off. In addition, it is preferable to install the spray device (9) in a position close to the spot where the cloth (5) is peeled off.
) is installed in close proximity to the In addition, the supply pressure of the injected air can be selected from a range, but if it is too large, there is a risk that the shape of the dot (8a) will be completely damaged, and if it is too small, it will not be able to fully demonstrate its function as a cutter. Therefore, it depends on the injection distance, but usually 4 to 8 ky/
CD (gauge) level is good. Also, if the temperature of the injected gas, such as air, is too low, the rotary screen (1
It is advantageous to heat the resin to at least room temperature or higher, for example, 40 to 180° C., since there is a risk that the heat of the molten resin to be transferred and applied will be taken away more than necessary and have an adverse effect on the transfer and application. The heating temperature is appropriately determined depending on the viscosity of the molten resin, and for example, if the viscosity is about 20,000 tons, it may be about 40 to 50°C, but if the viscosity is higher than this, it is heated to a much higher temperature.

As shown in an exaggerated manner in the enlarged detailed view of FIG. 2, a portion of the molten resin cut off by the air cutter effect and remaining on the rotary screen (1) side is
) may remain attached to the outer surface of the dots in a thread-like manner, and there is a risk that such adhesion remaining resin (8C) may be transferred to the cloth surface between the dots in the form of a film during the next rotation. Although such film transfer is extremely slight and can be ignored, from the standpoint of quality control, it is advantageous to eliminate it if possible.

In the present invention, a stripping knife 00 (see FIG. 1) can be provided near the cloth supply side of the rotary screen (1) for the purpose of removing such residual adhesive range (8C).

The apparatus of the present invention is capable of producing dot-shaped adhesive interlining for clothing as described above, and if such production is interrupted, the molten resin in the supply pipe (2) will cool and solidify, making it impossible to carry out the work. It will not be possible to restart.

In the present invention, in order to solve this problem, the supply pipe (2) is equipped with an outlet that can be opened as appropriate by opening and closing the pulp, and a piston-type extrusion device.

Part 8 of the present invention shown in FIG. 5! In the li mode,
One end of the supply pipe (2) is connected to the melting tank (not shown) of the microwave via the open/close pulp Ql) (6) arranged in two places in series and the hose Ql, and from the tank to the liquid supply position. ``j'' (not shown), it is supplied with a melting range.

On the other hand, a piston-type extrusion device Q4 is installed on the other end side of the supply pipe (2).
is provided, and the tip stone (14a) of the device Q4 is adapted to be slid toward one end as appropriate by manual operation or automatic operation by fluid control. This piston (1
4a) usually functions as a seal on the other end side.

Further, one end of the supply pipe (2) is provided with a discharge pipe α branched from between the opening and closing pulps (B) and (B), and an opening and closing pulp αQ is provided on the discharge pipe (to).

During normal operation, Pulp α is closed and Pulp (L) (2
) can be opened to supply molten resin to the supply pipe (2).

If you want to interrupt work, close the pulp (b) and close the pulp (b).
2) With the system open at 0 o'clock, the molten resin in the system from the melting tank (not shown) to the pulp (b) is pumped out of the system through the discharge pipe α by pumping air instead of resin. Discharge. Such discharge of the molten resin may be performed by applying other appropriate means.

Next, with the pulp (2) closed and the pulp Ql) α opened, the extrusion device Q4 is opened by sliding the extruder Q4 from the other end to the one end. The entire amount of molten resin can be discharged from the supply pipe (2) to the outside of the system through the discharge pipe (c).

When discharging such molten resin, a hissing (
If the pressing force caused by step 14a) or the diameter of the discharge pipe (g) is too small, the molten resin will flow through the injection port (2a) of the supply pipe (2).
Since the amount escaping into the screen (1) through the pipe increases, the pressing force is at least twice the outlet pressure of the spout (2a), and the diameter of the discharge pipe (to) is equal to the diameter of the supply pipe (2). It is preferable that the size is at least one-half or more. The discharge pipe (G) can be equipped with a mesh pipe (not shown) in order to make the discharged resin into a string shape and facilitate recycling.

During the resin discharge operation, a part of the molten resin inevitably passes through the inlet (2a) of the supply pipe (2) to the screen (1).
), but this amount is extremely small and can be easily peeled off and removed after cooling and solidification, so there is no particular problem.

FIG. 6 shows a modification of FIG. 5, and in this modification, an extrusion device Q4 is provided at one end of the supply pipe (2), and a discharge port (trough) is provided at the other end via an open/close pulp αη. ), and the other end of the pipe (2) is further provided with an opening/closing pulp (2) for appropriately discharging the molten resin from the system between the molten resin conduit α and the tank (not shown). Four discharge pipes are formed into branches.

In the modified example shown in Figure 6, during normal operation, the pulp (0η) is closed and the pulp c! If In is opened and the molten resin is discharged from the system between the conduit Q and the tank to the outside of the system through the discharge pipe, pulp (1)
is closed, pulp ■ is open, and when discharging the molten resin from the supply pipe (2), pulp 4 is closed and pulp a is closed.
n is opened, and the piston (14a) is operated in this state.

An example of production using the apparatus of the present invention is illustrated below.

[Manufacturing example 1] Outer diameter of rotary screen...204m
Length...+100 fl (effective length sooom) Thickness...0.25111 stitches...
611 pieces/square inch Temperature: 190±2℃ Backup 0
- Outer diameter of the cloth... 27 Off Cloth speed
... Gas pressure of 3 parts m/min air cutter ...
...Gas temperature of 5 atm (cage pressure) ...Nozzle gap length of 50 parts 2°C ... Nozzle gap length of IM f ... 10001ff Amount of resin attached to cloth...・15 g/m Under these conditions, the resin of [Example 1] was heated and melted at 195° C. and transferred and applied to a nonwoven fabric to obtain a good interlining as shown in FIG. 6. This interlining was adhered to a cotton woven fabric or a nonwoven fabric in a conventional manner, and the adhesive strength was measured.

Adhesion conditions - (150℃, pressure 350f/d% 18 seconds)
Adhesive strength (peeling resistance value) 6309/inch to cotton woven fabric 65 parts/inch to non-woven fabric No dots were obtained.

[Production Example 2] As a resin, commercially available polyamide (Diamid T-
The procedure was carried out under the same conditions as in Example 1 except that a mixture of 80 parts of 450') and 20 parts of the resin of Example 3 was used.
Good results similar to those in Example 1 were obtained.

[Production Example 3] Commercially available polyester (Puratherm Af12) was used as the resin.
50) Except for using a mixture of 85 parts of the resin of [Example 1] and 15 parts of the resin, the same conditions as in Example 1 were used, and the same good results as in Example 1 were obtained.

The manufacturing method of the present invention applies a rotary screen printing method to transfer and apply molten resin to cloth in the form of dots. This eliminates the need for this, and eliminates the problems of high raw material costs caused by fine resin powder processing and poor adhesive performance caused by the addition of glue. Furthermore, since the resin is melted in advance and transferred, there is no need to preheat the fabric or heat the entire fabric after transfer coating to melt and solidify the resin. Try to simplify it. Furthermore, since stringing of each dot is prevented by the gas injection, the molten resin can be transferred and coated in dots stably and reliably, making it possible to manufacture high-quality products.

Furthermore, when work is interrupted, the molten resin can be discharged from the supply pipe by opening and closing the valve and operating the piston, so the purpose of resin discharge can be easily achieved in terms of equipment and operation, and when work is resumed, Since new molten resin is supplied into the supply pipe, products with stable quality can be manufactured.

[Brief explanation of drawings]

@1 Figure is a vertical side view schematically showing an embodiment of the present invention,
Figure 2 is an enlarged vertical cross-sectional view of the transfer coating area;
5 and 4 are plan views of a product manufactured by the apparatus of the present invention, FIGS. 5 and 6 are side views showing two examples of application of the molten resin discharge means to the supply pipe, and FIG. 71i! fI and 8th
The figure is a schematic diagram of a conventional device. In the figure, (1) is the Tally screen, (2) is the supply pipe, (3) is the doctor knife, (4) is the backup roll, (5) is the cloth, (6) and (7) are the guides. 0-le,
(8) is the molten resin, (9) is the injection device, QI is the stripping knife, (11), @ is the valve, OaU hose, α→ is the extrusion device, 6 o'clock is the discharge pipe, and 9 o'clock is the valve. (that's all)

Claims (1)

[Claims] (1) While supplying molten hot-melt adhesive into the screen through a supply pipe that freely passes through the rotary screen in the axial direction, the adhesive is transferred and coated onto the cloth in dots through the rotary screen. The supply pipe is equipped with a system in which the entire amount of molten adhesive remaining in the pipe is extruded out of the system through a discharge port that can be opened when necessary when work is interrupted. 1. A manufacturing device for dot-shaped adhesive interlining for clothing, characterized in that it is equipped with a piston-type extrusion device for producing dot-type adhesive interlining for clothing.