JPS60242960A - Porous resin media and its manufacturing method - Google Patents

Abstract

PURPOSE:To provide a media with sufficient untwine, decoloration and soft finish by furnishing plastic grains each formed into a specific size with a number of pores at its surface zone, sinking the virtual specific gravity below one, and thereby relieving shocks to be applied to fibers. CONSTITUTION:To manufacture plastic grains, mix 20-50wt% of unsaturated polyester resin with 30-10wt% of vinyl chloride resin, followed by well agitation. A mix of 49-30wt% of silica and 1-10wt% of foaming styrol resin is added to the above to be followed by well agitation, then the admixture is cast and dried at 200-250 deg.C. After getting rid of the die, the product is provided with a number of air holes 1 inside and at the surface to form a porous resin media 3 having a virtual specific gravity of no more than one to be used for processing a barrel. According to this arrangement the media has an extraordinary soft touch with cloths, assuring very good finish with fine skin feeling. As the surface is as rough as that of a pumice, it has a good effect for untwine and decoloration.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a porous resin barrel media, and relates to the manufacture, sale, and use of barrel media that is charged together with a workpiece into a barrel processing machine. It belongs to the industrial field.

(Object of the Invention) The present invention relates to a lightweight barrel media having pumice-like air bubbles on its surface and a method for producing the same, which is intended for use in loosening and decolorizing clothing such as jeans.

(Prior art) Conventionally known molded barrel media can be roughly divided into inorganic vitrified media and organic synthetic resin media, but the former has a bulk specific gravity of 2.0 to 2.
．． The latter has a bulk specific gravity of nearly 1, which is light but has a smooth surface.

On the other hand, in barrel processing, the workpiece and media (hereinafter referred to as mass) are charged into a barrel tank, and water and compound are also charged if necessary, and the barrel tank is rotated or vibrated, or the mass is subjected to centrifugal flow, etc. The workpiece is processed by media, and the processing includes grinding, deburring, scaling, R, surface roughening, plating base, painting base, gloss finishing, mixing, stirring, and crushing. It is wide-ranging. Recently, this barrel processing has come to be used for loosening and decolorizing clothing such as jeans.

(Problems to be Solved by the Invention) In the conventional barrel processing method for clothing such as jeans,
When conventional hydrified media is used, the heavy weight of the media causes the clothing and media to separate, or the contact is too strong, making it impossible to achieve a soft finish. In addition, synthetic resin media had a problem in that the surface was too smooth, making it difficult to remove and decolorize the media sufficiently.

(Means for solving the problem) However, in the present invention, a large number of small holes are provided on the surface of synthetic resin particles molded to a predetermined size, and the true specific gravity of the synthetic resin particles is set to 1 or less. This not only corrected the smoothness but also alleviated the impact force on the fibers.

Next, in order to produce the synthetic resin particles as described above, 20% to 50% by weight of unsaturated polyester resin and 30% by weight
~10% by weight of vinyl chloride resin is mixed and stirred, and 49% to 30% by weight of silica (particle size is #100) is added to the mixture.
~#200 is suitable) and 1% to 10% by weight of expanded polystyrene resin (diameter of φ3ml to φ5mm is suitable) are mixed and stirred, molded, heated at 200℃ to 250℃, dried, and demolded. with a large number of pores on the surface and inside (diameter is φ
This porous resin media for barrel processing has a true specific gravity of 1 or less.

(Effects) Since the present invention uses unsaturated polyester resin as the main raw material as described above, the molding media thereof has high hardness and high wear resistance. Furthermore, by mixing vinyl chloride resin, the flexibility of the molding media increases, the reaction rate of the styrene foam resin can be suppressed, and the size of the pores can be adjusted. As the silica, silicon oxide such as silica sand and silica stone is used.

This silica not only serves as a filler but also has an abrasive action.

Next, since the media molded by the above manufacturing method has a large number of pores inside, the true specific gravity is 1 or less and it floats on water. Therefore, the contact state of the media with the clothing is extremely soft, resulting in a good finish with a nice texture. Also, since the surface of the media is rough like pumice, it is effective for sufficient removal and decolorization.

(Example) According to the compounding ratio shown in Table 1 below, an unsaturated polyester resin and a vinyl chloride resin are first mixed and stirred at a temperature of 20°C to 30°C for about 3 hours.

Next, silica and styrofoam resin are added to the mixture in a ratio of 1 part of the batter, and again at a temperature of 20°C to 30°C, about 1 part of the styrofoam resin is added.
Stir to mix for an hour.

Next, the mixture was poured into a bullet-shaped mold and molded.
It was dried at a temperature of .degree. C. to 250.degree. C. and demolded to produce a porous resin medium 3 having pores 1 in a main body 2 as shown in FIG.

Table 1 The perforated paper resin media produced according to this example was charged together with water into a rotating barrel RH-200 manufactured by Shikishima Tipton Co., Ltd., jeans as the material to be processed were charged, and the rotating barrel was rotated in the usual manner. After spinning for about 2 hours, there were no thread breaks and the finished product was loose and loose. The beads were also in a very good decolorized state.

The mixing ratio of each material is shown in Table 1, but is not limited to this ratio. For example, unsaturated polyester resin 20% to 50% (by weight, the same applies hereinafter), vinyl chloride resin 30% to 10%, silica 50% to 30%, and expanded polystyrene 1% to 10% were recognized as usage ranges.

[Brief explanation of drawings] The figure is a front view of an embodiment of the invention. 1... Pores 3... Porous resin media patent applicant Shikishima Tipton Co., Ltd. agent Masatsugu Suzuki

Claims (1)

[Scope of Claims] 1. A porous resin media characterized by having a large number of pores in a barrel processing media mainly composed of synthetic resin and having a true specific gravity of 1 or less. 2. (20% by weight to 50% by weight) Unsaturated polyester resin (30% to 10% by weight) and vinyl chloride resin (30% to 10% by weight) are mixed and stirred, and silica (49% to 30% by weight) and silica (1% to 10% by weight) are added to the mixture. After adding Styrofoam resin and stirring, mold it and heat it to 200℃~250℃.
A method for producing porous resin media characterized by producing a molded body by drying at °C and demolding.