JP2945632B2 - Embroidery reinforcing material and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing material for a cloth suitable for embroidering a cloth such as a knitted fabric.

[0002]

2. Description of the Related Art When machine embroidery is performed on a long fabric such as a knitted fabric, if the fabric is thin or coarse, the fabric is backed and reinforced. The method of embroidering on a cloth that has been applied is generally adopted.

[0003] If the embroidery is performed on the fabric as it is, if the fabric is thin or coarse, the fabric is deformed under the tension in the transport direction and deformed. This is because the embroidery is applied to the fabric in the state, and the applied embroidery pattern is deformed when the fabric is relaxed, and does not become a predetermined embroidery pattern. For this reason, backing the fabric,
This prevents the deformation of the fabric due to the tension during transport.

[0004] Conventionally, as a reinforcing material for backing the fabric, the fabric is stretched by increasing the stretching ratio in one direction, and slits are formed substantially parallel to the stretching direction and intermittently. A split-fiber nonwoven fabric obtained by laminating and bonding a plurality of water-soluble films made of polyvinyl alcohol obtained by widening such that the stretching direction is substantially perpendicular to the background is known (Japanese Utility Model Laid-Open No. 3-18194). Gazette).

Since the embroidery reinforcing material is a non-woven fabric, it is characterized by high productivity, low cost, thinness, light weight, and high strength. The characteristic feature is that a simple reinforcing material can be easily removed by dissolving with water.

[0006]

In recent years, the number of embroidery products dyed as high value-added products has been increasing. In particular, in order to obtain multicolor embroidery products, embroidery threads and cloths have been prepared in advance. So-called "dyed embroidery" is performed, in which the embroidery is dyed in a predetermined color and then embroidered with an embroidery thread of a desired color.

However, the above-described conventional dyed embroidery using the embroidery reinforcing material has the following problems.

That is, in order to completely dissolve and remove the conventional embroidery reinforcing material, it is necessary to use hot water of 90 ° C. or higher. In the dyes that are used, discoloration due to lack of fastness,
Or a problem such as color transfer occurs.

The present inventors have conducted intensive studies on the cause of the high melting temperature of the embroidery reinforcing material. As a result, during the process of stretching, laminating, bonding and drying the polyvinyl alcohol film,
It has been found that the degree of saponification of the film changes and the melting temperature of the film increases due to this change, and the present invention has been completed. Therefore, the present invention
The embroidery thread and fabric used for yarn-dyed embroidery do not fade,
Another object of the present invention is to provide a water-soluble embroidery reinforcing material which can be dissolved in hot water at a low temperature (70 ° C. to 80 ° C.) at which color transfer does not occur, and a method for producing the same.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a method for stretching a film by increasing the stretching ratio in one direction, and forming slits substantially parallel to the stretching direction and intermittently. A split-fiber nonwoven fabric obtained by laminating, adhering and drying a plurality of sheets of a polyvinyl alcohol-based synthetic resin film obtained by widening such that the stretching direction is substantially perpendicular to the background, and The degree of saponification of the alcohol-based synthetic resin film is 97.0 mol% or more and 98.0% or more.
The reinforcing material for embroidery, which is not more than mol%.

Such an embroidery reinforcing material has a saponification degree of 9
An unstretched polyvinyl alcohol-based synthetic resin film having a molar ratio of 6.5 mol% or more and 97.8 mol% or less is stretched so that the stretching ratio in one direction is large, and then substantially parallel to the stretching direction. In addition to intermittently forming slits and widening the slits, a plurality of sheets of the obtained polyvinyl alcohol-based synthetic resin film are stacked so that the stretching direction is substantially perpendicular to the background, and It can be manufactured by bonding alcohol-based synthetic resin films to each other and then drying.

[0012] The plurality of laminated polyvinyl alcohol-based synthetic resin films may be bonded by a water-soluble binder in which a water-soluble synthetic resin is dispersed and dissolved in water.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the embroidery reinforcing material of the present invention will be described below.

As described above, the reinforcing material for embroidery in the present invention uses a polyvinyl alcohol-based synthetic resin film (hereinafter simply referred to as “film”).
The film mentioned here includes not only a film made of polyvinyl alcohol alone but also a film containing a plasticizer such as glycerin and diethylene glycol.

The film is stretched, laminated, adhered,
The degree of saponification after drying is 97.0 mol% or more, and 98.0 mol%.
It is necessary to be less than mol%. If the degree of saponification of the film is greater than 98.0 mol%, the film is dissolved in low-temperature (80 ° C. or less) warm water that does not cause fading or discoloration of the embroidery thread and fabric used for yarn-dyed embroidery. Because they cannot do it. On the other hand, the saponification degree of the film is 9
If the content is less than 7.0 mol%, the film can be dissolved at a very low temperature of 60 ° C. or less. It is.

A more preferable range of the saponification degree of the film is 97.0 mol% or more and 97.5 mol% or less. If the degree of saponification is more than 97.5 mol%, the dissolving temperature of the film is 80 ° C. or lower, but the temperature is relatively high, and the time required for dissolving the film becomes longer. .

The term "degree of saponification" as used herein refers to the degree of substitution of an acetyl group with a hydroxyl group in a monomolecule in a polyvinyl alcohol polymer chain in terms of mole fraction, and is defined by JIS K6726 "Polyvinyl alcohol". It is a value measured in accordance with “Test method”.

In order to make the saponification degree of the film after stretching, laminating, bonding and drying at 97.0 mol% or more and 98.0 mol% or less, the saponification degree of the unstretched film which is the starting material is 96%. It is necessary to be not less than 0.5 mol% and not more than 97.8 mol%. This is based on the finding that, when an unstretched film is stretched, the degree of saponification increases and the melting temperature increases.

Next, slits are formed in the stretched film intermittently in a direction substantially parallel to the stretching direction, and the slits are widened. Then, a plurality of obtained films are stretched in the stretching direction. The desired embroidery reinforcing material can be obtained by laminating the laminated films so as to be substantially perpendicular to each other and by bonding the laminated films to each other and drying the laminated films. And the like. In particular, a water-soluble binder obtained by dispersing and dissolving a water-soluble synthetic resin such as polyvinyl alcohol or polyethylene oxide in an aqueous solution is most preferable. This is because the water-soluble synthetic resin is easily dissolved in warm water, and the film and the water-soluble synthetic resin are both polar polymers and have high mutual affinity, so that high adhesive strength can be obtained. .

The aqueous solution of polyvinyl alcohol is relatively stable, and can have a long pot time (time until the aqueous solution is supplied to the pad and applied to the film). is there. When polyvinyl alcohol is used as the water-soluble binder, the dried film is unstretched,
Further, since the film thickness of the dried film is very thin, the film is dissolved in warm water of 80 ° C. or less in a short time even after drying, so that the saponification degree is not particularly limited. However, in order to obtain a dried film having sufficient strength, the average degree of polymerization is preferably set to 1400 or more.

[0021]

Embodiments of the present invention will be described below.

Example 1 First, the average degree of polymerization was 1700.
And a polyvinyl alcohol film having a degree of saponification of 97.2 mol% (hereinafter referred to as "PVA film")
Was stretched 6.1 times at a temperature of 180 ° C.

Next, a fine slit having a width of 1 mm parallel to the stretching direction was applied to the PVA film using a razor splitter (slit imparting device).

Next, 18
Heat treatment was performed for 30 seconds at a temperature of 0 ° C. to obtain a stable fibrillated PVA film.

Next, the width of the PVA film is doubled, and the PVA film is cut into a predetermined length to form two sheets of PVA.
Film. Then, the two PVA films were laminated so that their stretching directions were substantially perpendicular to each other, and the two PVA films were bonded with an adhesive. The adhesive had an average degree of polymerization of 1400.
An aqueous solution obtained by diluting polyvinyl alcohol having a saponification degree of 99.9 mol% to 5% was used.

Next, the laminated and bonded PVA film was dried on a hot cylinder to obtain an embroidery reinforcing material of Example 1.

Example 2 The embroidery of Example 2 was carried out in the same manner as in Example 1 except that an unstretched PVA film having a saponification degree of 96.9 mol% was used and stretched 6.0 times. A reinforcing material was obtained.

Example 3 The embroidery of Example 3 was carried out in the same manner as in Example 1 except that an unstretched PVA film having a saponification degree of 96.5 mol% was stretched 5.8 times. A reinforcing material was obtained.

Comparative Example 1 The embroidery of Comparative Example 1 was carried out in the same manner as in Example 1 except that an unstretched PVA film having a saponification degree of 98.8 mol% was stretched by 6.2 times. A reinforcing material was obtained.

Comparative Example 2 The embroidery of Comparative Example 2 was carried out in the same manner as in Example 1 except that an unstretched PVA film having a saponification degree of 95.1 mol% was used and stretched 5.7 times. Reinforced material was manufactured.

With respect to the embroidery reinforcing materials of Examples 1 to 3 and Comparative Examples 1 and 2 obtained as described above, the degree of saponification,
The results of measuring the melting temperature and the tensile modulus are shown in Table 1 below.

The degree of saponification was measured according to JIS K6726 "Testing method for polyvinyl alcohol".

The dissolution temperature in hot water was measured as follows. That is, 600 cc of room temperature tap water was placed in a beaker having a capacity of 1000 cc, and a measurement sample (100 m
m × 100 mm), and heat the mixture to a heating rate of about 3 ° C./min while gently stirring the mixture. The melting temperature was defined as the temperature at which was completely dissolved.

Further, the tensile elastic modulus is determined according to JIS K 712.
According to No. 7, "Plastic film and sheet tensile test method", a No. 1 type test piece having a width of 30 mm was used as a sample, and the test speed was 1 ± 0.5 mm per minute. According to this measuring method, the smaller the numerical value, the more flexible the material.

[0035]

[Table 1]

As shown in Table 1, for the embroidery reinforcing materials of Examples 1 to 3, the degree of saponification of the PVA film after stretching was in the range of 97.0 mol% to 98.0 mol%. As a result, the melting temperature was 80 ° C. or less in all cases, and the material could be sufficiently used as a reinforcing material for dying embroidery.

On the other hand, the reinforcing material for embroidery of Comparative Example 1 had a degree of saponification of the PVA film after stretching of 99.8 mol%.
Since these are all higher than those of Examples 1 to 3, the melting temperature is 92 ° C., which is higher than the intended 80 ° C., and cannot be used as a reinforcing material for dying embroidery.

Further, the reinforcing material for embroidery of Comparative Example 2 had a low saponification degree of 95.5 mol% after stretching, and thus had a low melting temperature.
In the drying step after bonding, the PVA film was dissolved, and a final embroidery reinforcing material could not be obtained.

Further, the embroidery reinforcements of Examples 1 to 3 have a smaller value of tensile modulus than the embroidery reinforcement of Comparative Example 1. Therefore, the embroidery reinforcements of Examples 1 to 3 It can be seen that is softer than the embroidery reinforcing material of Comparative Example 1 and has good workability and handleability.

[0040]

As described above in detail, in the reinforcing material for embroidery of the present invention, the degree of saponification of the polyvinyl alcohol-based synthetic resin film after stretching, laminating, bonding and drying is reduced. It becomes possible to dissolve the reinforcing material for use with hot water of 80 ° C. or less. Therefore, the reinforcing material for embroidery can be used for yarn-dyed embroidery, and it is possible to prevent problems such as discoloration or color transfer of embroidery thread and cloth, which have been a problem in the conventional dye-embroidery. Was.

Further, since the melting temperature is low, the embroidery reinforcing material is susceptible to humidity and moisture, and therefore exhibits a large shrinkage behavior in the bonding and drying steps, causing excessive pulling in one direction. The strain of the stretched molecular chain is corrected, and a high tensile modulus is provided.
Therefore, according to the present invention, there is an effect that an embroidery reinforcing material which is flexible and has improved workability and handleability can be obtained.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-287856 (JP, A) JP-A-6-2259 (JP, A) JP-A-5-321105 (JP, A) 94293 (JP, U) JP-A-4-97893 (JP, U) JP-A-2-140993 (JP, U) JP-A 43-30146 (JP, Y1) (58) Fields surveyed (Int. Cl. ⁶ , DB name) D05C 17/00

Claims (4)

(57) [Claims] 1. A plurality of sheets of a polyvinyl alcohol-based synthetic resin film obtained by stretching at a large stretching ratio in one direction, forming slits substantially parallel to the stretching direction and intermittently, and widening the slits. Is a split-fiber nonwoven fabric obtained by laminating, adhering, and drying such that the stretching direction is substantially perpendicular to the process, wherein the polyvinyl alcohol-based synthetic resin film after drying has a saponification degree of 97.0 mol% or more. , 98.0 mol% or less. 2. The reinforcing material for embroidery according to claim 1, wherein the plurality of laminated polyvinyl alcohol-based synthetic resin films are bonded by a water-soluble binder in which a water-soluble synthetic resin is dispersed and dissolved in water. . 3. A saponification degree of 96.5 mol% or more and 97.8% or more.
The unstretched polyvinyl alcohol-based synthetic resin film of not more than mol% is stretched by increasing the stretching ratio in one direction, and then slits are formed substantially parallel to the stretching direction and intermittently. Then, while laminating a plurality of the obtained polyvinyl alcohol-based synthetic resin films such that the stretching direction thereof is substantially perpendicular to the background, and after bonding the laminated polyvinyl alcohol-based synthetic resin films to each other, A method for producing an embroidery reinforcing material, characterized by drying. 4. The reinforcing material for embroidery according to claim 3, wherein said plurality of laminated polyvinyl alcohol-based synthetic resin films are bonded with a water-soluble binder in which a water-soluble synthetic resin is dispersed and dissolved in water. Manufacturing method.