JPS5854802B2 - Manufacturing method for multilayer slush molded shoes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a slush-molded shoe consisting of multiple layers, and in particular, to a method for manufacturing a slush-molded shoe consisting of multiple layers, in which the sole, sole peripheral tape portion, and lace portion have different colors and/or physical properties. Regarding manufacturing methods.

In general, slush-molded shoes made of polyvinyl chloride plastisol can freely have the same appearance as the wrinkles, patterns, seams, etc. of leather shoes, and can also provide unique suppleness, feel, etc.

It is widely used because it does not leak water and has chemical resistance, oil resistance, etc. unique to polyvinyl chloride.

Attempts have been made to improve functionality and commercial value by configuring the outer surface of slush-molded shoes, which have many of these features, with a combination of different colors and/or foreign materials.

For example, in an attempt to create a unique combination of a lower part that includes the bottom and the bottom peripheral tape and an upper part that mainly consists of the trunk, the polyvinyl chloride plastisol for the upper part is different from the polyvinyl chloride plastisol for the lower part. Inject it to the upper end of the forming part of the bottom peripheral tape inside the mold without staining the inner wall, apply heat to attach a semi-gelled layer of the required floating dust, and when discharging the ungelled polyvinyl chloride plastisol, Since the mold was inverted or tilted, the polyvinyl chloride plastisol for the bottom and bottom circumferential tape adhered to the upper part of the bottom peripheral tape forming part, that is, the body forming part, contaminating the area and reducing the product value. High slash molded shoes were not obtained.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a multilayer slush molded shoe that has excellent functionality and high commercial value without impairing its appearance.

The present invention involves injecting polyvinyl chloride plastisol, which has a multilayer structure and having different colors and/or foreign substances, into a slush mold so as not to stain the inner wall, and then heats it to adhere a semi-gelled layer. When discharging the kelized polyvinyl chloride plastisol, do not invert or tilt the mold, and discharge by vacuum suction, and repeat this operation as many times as necessary using polyvinyl chloride plastisol of a different color and/or foreign substance. After this, by a known method, polyvinyl chloride plastisol for the body is injected, a semi-gelled layer is attached to the inner surface by heating, and the ungelled plastisol is discharged. This method further heats the material to gel the entire material, resulting in a multilayered slush molded shoe.

By carrying out the present invention, when forming a lower part including a multilayer slush molded shoe sole and a sole peripheral tape, the polyvinyl chloride plastisol, which has a multilayer structure and has different colors and/or foreign substances, can be used. One of these is injected into the inside of the slush mold so as not to stain the inner wall, a semi-gelled layer is attached by heating, and when the ungelled polyvinyl chloride plastisol is discharged, a semi-gelled layer is applied by vacuum suction. The desired semi-gelled layer can be applied to the desired location without contaminating areas other than the areas to which the gelled layer is attached, and the combination of color and physical properties at the bottom and top of the slush molded shoe can be achieved as desired. As a result, it was possible to obtain slash-molded shoes that have an excellent appearance and are rich in functionality.

Example 1 Compound For bottom part For body part f IJ :I! (lj tuff'"/l/7'5x
Parts by weight) Resin for Chisol (average degree of polymerization 1,600) 100100 For the bottom part For the body part (parts by weight) (parts by weight) Plasticizer (G2-1CH, 59゜hexyl fucrate) Stabilizer ( Stabilizer (epoxy soybean oil) 11 White pigment -2 Yellow pigment 2 Polyvinyl chloride plastisol for the bottom and polyvinyl chloride plastisol for the body were prepared according to the above formulations.

Inject polyvinyl chloride plastisol for the bottom into the bottom forming part inside the slush mold at a humidity of 170°C, taking care not to stain the inner surface, and leave it to stand for 2 minutes to adhere a semi-gelled layer of 1.5 to 2 layers. The ungelled polyvinyl chloride plastisol was evacuated with a vacuum pump having a 10 mm diameter inlet.

In order to prevent the semi-gelled layer from sagging, it was heated at 200° C. for an additional 2 minutes.

Next, polyvinyl chloride plastisol for the torso is injected into the mold to a point slightly above the upper end of the shoe opening forming part.
Heated at 70°C for 2 minutes to deposit a semi-gelled layer of 1.3 to 1.7 mm, the ungelled polychlorinated polyvinyl chloride plastisol was discharged by tilting the mold, and heated at 180°C for 10 minutes. The entire mixture was heated to gel, cooled to near Jobuchi, and taken out.

Cut off the protruding part at the top of the shoe opening, glue the leather insole to the top of the bottom, insert the torso lining fabric, and sew it to the top of the shoe opening to create a slush molded shoe made of two colors with a flexible torso and hard sole. Obtained.

Example 2 Compound Resin for polyvinyl chloride plastisol for soles, heels, and trunks (average degree of polymerization 1.600) 100 100 100 Plasticizer (di-2-ethylhexyl chloride) 0 0 0 Stabilizer (di-2-ethylhexyl chloride) Butyltin dilaurate) Stabilizer (epoxy soybean oil) 1.5 1.5 1.5 ■ White pigment for the bottom, heel, and trunk 2-- Blue pigment 2 Yellow pigment 2 According to the above formulation, polyvinyl chloride plastisol for the bottom ,
Polyvinyl chloride plastisol for the heel and polyvinyl chloride plastisol for the torso were respectively prepared.

Inject the polyvinyl chloride plastisol for the bottom into the bottom forming part inside the slush mold at a humidity of 170°C, taking care not to stain the inner wall, and shake it back and forth for 2 minutes to form a semi-gel of 1.5 to 2 mm in the shape of an arc at the top end. The layers were deposited and the ungelled polyvinyl chloride plastisol was evacuated with a vacuum pump having a 10rnrnO) diameter inlet.

In order to prevent the semi-gelled layer from sagging, it was heated at 200° C. for an additional 2 minutes.

Next, raise the toe part of the mold and lower the heel part, and inject polyvinyl chloride plastisol for the heel part into the inner heel part forming part so as not to stain the inner wall, and leave it for 2 minutes.
~2 semi-gelled layers were deposited and the ungelled polyvinyl chloride plastisol was evacuated using a vacuum pump with a 10 mm diameter suction port at 200°C to prevent the semi-gelled layers from sagging.
and heated for 2 minutes.

Next, polyvinyl chloride plastisol for the torso is injected into the mold to a point slightly above the upper end of the shoe opening forming part,
Heat at 170°C for 2 minutes to deposit a semi-gelled layer of 3 to 17 layers, and ungelled polyvinyl chloride plastisol.
The mold was tilted and discharged, heated at 180° C. for 10 minutes to gel the whole, cooled to near constant mixing, and taken out.

Cut off the protruding part at the top of the shoe opening, glue the leather insole to the top of the bottom, insert the torso lining fabric, and sew it to the top of the shoe opening to create a slush molded shoe made of three colors with a flexible torso and hard sole. Obtained.

Claims (1)

[Claims] 1. Polyvinyl chloride plastisol is injected to a predetermined position inside the slush mold without staining the inner wall, and a semi-gelled layer of floating dust is adhered to the inner surface by heating, and the non-gelled polychloride is heated. The first step is to discharge the vinyl plastisol by vacuum suction, and the polyvinyl chloride plastisol, which has a different color and/or foreign substance than the polyvinyl chloride plastisol, is injected to a point slightly above the upper end of the shoe opening forming part of the slush molding mold, and then heated. A second step of attaching a semi-gelled layer of floating dust to the inner surface and discharging the ungelled polyvinyl chloride plastisol, and a third step of completely gelling the semi-gelled layer attached to the inner surface by heating. A method for manufacturing slush-molded shoes consisting of multiple layers, characterized by: 2 Inject polyvinyl chloride plastisol to a predetermined position inside the slush mold without staining the inner wall, heat to adhere a semi-gelled layer of floating dust to the inner surface, and remove the ungelled polyvinyl chloride plastisol by vacuum suction. Step 1-1 of discharging, and injecting polyvinyl chloride plastisol having a different color and/or foreign substance from the polyvinyl chloride plastisol to another predetermined position above the semi-gelled layer, and removing floating dust as appropriate on the inner surface by heating. Step 1-2 of depositing a semi-gelled layer of the polyvinyl chloride plastisol and discharging the non-gelled polyvinyl chloride plastisol by vacuum suction, and if necessary, repeating the same steps as Step 1-2 a required number of times. 3,
In step 1-4, polyvinyl chloride plastisol, which has a different color and/or foreign substance than the polyvinyl chloride plastisol used in the first step, is injected to a point slightly above the upper end of the shoe opening forming part of the slush mold. , a second step of attaching a semi-gelled layer of floating dust to the inner surface by heating and discharging ungelled polyvinyl chloride plastisol; and a second step of completely gelling the semi-gelled layer attached to the inner surface by heating. A method for manufacturing slush molded shoes consisting of multiple layers, characterized by comprising three steps.