KR20180119650A - METHOD FOR MANUFACTURING A MOLDED PRODUCT CONTAINING A GRAIN PATTERN, - Google Patents

Abstract

It is another object of the present invention to provide a method for producing a molded article having a grain pattern formed thereon without performing a step of processing the concavo-convex pattern. An extrusion step of extruding the melt-kneaded product from a discharge port of an extrusion die by an extrusion molding method to produce a molded product, a step of extruding the extruded product, And a cooling step of cooling a molded article extruded in the step of forming the grain pattern.

Description

METHOD FOR MANUFACTURING A MOLDED PRODUCT CONTAINING A GRAIN PATTERN,

The present invention relates to a method for producing a molded article on which a grain pattern is formed, and a molded article on which a grain pattern is formed.

A molded product obtained by extruding a material such as a thermoplastic resin or a thermoplastic elastomer into a sheet or a film is used for various purposes such as construction, civil engineering, daily necessities and agricultural use. In addition, molded articles extruded into tubular bodies are used for trash bags, tubes for filling cosmetics, foods, and the like. Such a molded product can be produced by extruding a molten thermoplastic resin, a thermoplastic elastomer, or the like from a discharge port of an extrusion die.

However, materials such as thermoplastic resins, thermoplastic elastomers and the like have a problem that a blocking phenomenon occurs, which adheres to each other and can not easily be peeled off when they are overlapped. Therefore, it is preferable to use a natural organic material fine powder having an average particle diameter of 30 μm or less and a water content of 10 wt% or less in an amount of 1 to 40 wt% or more in a material such as a thermoplastic resin or a thermoplastic elastomer and containing at least one selected from silk powder, wool powder, And a method of adding 5 wt% or less of a heat stabilizer is known (refer to Patent Document 1).

In addition, it is known that forming a grain (concave-convex) pattern on a molded article enhances the appearance, and in the case of a thin film-shaped molded article such as a garbage bag, it also serves to facilitate peeling of the films. A method of forming a grain pattern on a molded article is known in which a thermoplastic resin film after extrusion is pressed by a pair of rollers, at least one of which is a roller having concave and convex portions (see Patent Document 2).

Japanese Patent No. 3014585 Japanese Unexamined Patent Application Publication No. 5-309730

The method of pressing with a roller having unevenness described in Patent Document 2 can be suitably used for a flat-shaped molded article extruded by a T-die method. However, when a molded article is produced by the inflation method, the molded article is extruded into a cylindrical shape. Therefore, there is a problem that when the molded product extruded in the form of a cylinder is pressed by a roller having concave and convex portions, the molded product is adhered. At present, a method of forming a grain pattern on a molded article extruded by the inflation method is not known.

On the other hand, in the T-die method, when the thickness of the extruded molded article is different, it is necessary to adjust the interval of the irregular rollers according to the thickness. In addition, when a part of the irregularities of the roller irregularities is worn or damaged, it is necessary to replace the entire roller. In the production of a molded article having a grain pattern formed by a T-die method, a simpler manufacturing method is also required.

DISCLOSURE OF THE INVENTION The present invention has been made in order to solve the problems described above. As a result of intensive studies, it has been surprisingly found that when glass wool is added to melt kneaded products for extrusion molding, Is described as " uneven processing "), a grain pattern is formed on the surface of the extruded molded article.

That is, an object of the present invention is to provide a method for producing a molded article, in which a grain pattern is formed, without performing a roughening process, and a molded article formed with a grain pattern.

The present invention relates to a method of producing a molded article on which a grain pattern is formed, and a molded article on which a grain pattern is formed, as described below.

(1) a melting step for producing a melt-kneaded product comprising at least a thermoplastic resin and / or a thermoplastic elastomer, and a glass wool;

An extrusion step of extruding the melt-kneaded product from the discharge port of the extrusion die by an extrusion molding method to produce a molded article,

And a cooling step of cooling the extruded molded article in the extrusion step.

(2) The grain pattern according to (1), wherein the content of the glass wool is 1 to 20% by weight.

(3) A method for producing a molded article, wherein the extrusion molding method is an inflation method or a T-die method, and the molded article is a film, a sheet, or a cylinder, and the grain pattern described in (1) or (2) is formed.

(4) The extrusion molding method is a co-extrusion molding method,

Wherein the molded article is formed as a laminated multilayer article,

(1) or (2), wherein at least one of the layers on the outer side of the multilayer article is a layer formed by extruding a melt-kneaded product containing at least the thermoplastic resin and / or the thermoplastic elastomer and the glass wool. To form a molded article.

(5) The extrusion molding method is co-extrusion by the inflation method or co-extrusion by the T-die method,

Wherein the molded article is formed as a multilayer article,

Wherein at least one of the layers on the outer side of the multilayer article is a layer formed by extruding a molten kneaded product containing at least the thermoplastic resin and / or the thermoplastic elastomer and the glass wool, the molded article having the grain pattern according to (3) Gt;

(6) A molded article formed with a grain pattern, at least comprising a thermoplastic resin and / or a thermoplastic elastomer, and a glass wool.

(7) The molded product according to the above (6), wherein the content of the glass wool is 1 to 20% by weight.

(8) The molded product in which the molded product is a film, a sheet, or a cylindrical shape and in which the grain pattern described in (6) or (7) is formed.

(9) the molded article is a multilayer article,

The molded article formed with the grain pattern according to any one of (6) to (8), wherein at least one of the layers on the outer side of the multilayer article is a layer containing at least the thermoplastic resin and / or thermoplastic elastomer and glass wool.

(10) The molded product according to (8) or (9), wherein the molded article has a thickness of 3 m to 300 m.

In the present invention, a grain pattern is formed on the surface of the extruded molded product by simply adding glass wool to the melt-kneaded product for extrusion molding. Therefore, from the viewpoint that the uneven processing is unnecessary, a molded article having a grain pattern can be produced by various extrusion methods including an inflation method.

1 (A) is a photograph of glass wool, and Fig. 1 (B) is a photograph of glass fiber.
2 (A) is a photograph of the envelope produced in Example 1, and Fig. 2 (B) is a photograph of the envelope prepared in Comparative Example 1. Fig.
3 is a photograph of the envelope prepared in Example 2,
4 (A) is a photograph of the layer side including the glass wool of the two-layer film produced in Example 3, and Fig. 4 (B) is a photograph of the layer side including the glass wool It is a photograph.
5 (A) is a photograph of the layer side including the glass wool of the two-layer film produced in Example 4, and Fig. 5 (B) is a photograph of the layer side including the glass wool It is a photograph.
6 (A) is a photograph of the film produced in Example 5, and Fig. 6 (B) is a photograph of the film produced in Comparative Example 2. Fig.
Fig. 7 (A) is a photograph of the tubular body manufactured in Example 6, Fig. 7 (B) is a photograph of the tubular body after printing, Fig. 7 It is a photograph that formed a spiral for locking the cap.
8 (A) is an X-ray transmission image of the film produced in Example 1, and Fig. 8 (B) is an X-ray transmission image of the film produced in Example 5. Fig.

Hereinafter, a method for producing a molded article in which the grain pattern of the present invention is formed (hereinafter referred to simply as a "manufacturing method"), and a molded article formed with a grain pattern (hereinafter simply referred to as "molded article" ) Will be described in detail.

The production method of the present invention can be applied to a melt process for producing a melt-kneaded product comprising at least a thermoplastic resin and / or a thermoplastic elastomer (hereinafter sometimes referred to as " resin ") and glass wool, And a cooling step of cooling the extruded molded article in the extruding step. The present invention also provides a method of manufacturing a molded article, A grain pattern can be formed on a molded article by a melting process, an extruding process, and a cooling process. In addition, the manufacturing method may include other processes, such as a printing process for printing the surface of the molded product after the cooling process, if necessary. Other processes such as a printing process may be carried out by a known method.

The thermoplastic resin is not particularly limited as long as it can be mixed with glass wool. For example, conventionally used thermoplastic resins such as general-purpose plastics, engineering plastics, and super engineering plastics can be cited. Specific examples of the general plastic include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyvinylidene chloride, polystyrene (PS), polyvinyl acetate (PVAc), polytetrafluoroethylene PTFE), acrylonitrile butadiene styrene resin (ABS resin), styrene acrylonitrile copolymer (AS resin), and acrylic resin (PMMA). Engineering and plastics include polyamide (PA), polyacetal (POM), polycarbonate (PC), modified polyphenylene ether (m-PPE, modified PPE, PPO), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), syndiotactic polystyrene (SPS), and cyclic polyolefin (COP). Super engineering plastics include polyphenylene sulfide (PPS), polytetrafluoroethylene (PTFE), polysulfone (PSF), polyethersulfone (PES), amorphous polyarylate (PAR), polyetheretherketone ), Thermoplastic polyimide (PI), polyamideimide (PAI), and the like. These resins may be used alone or in combination of two or more.

The thermoplastic elastomer is not particularly limited as long as it can be mixed with the glass wool. For example, an ethylene-propylene copolymer, an ethylene-propylene-diene copolymer, a styrene-diene block copolymer, a styrene-diene-styrene block copolymer and hydrogenated ones can be used. Do. It is also possible to use the thermoplastic resin and the thermoplastic elastomer together.

In the present invention, glass wool means that the glass fiber having a fiber diameter of about 1 to 7 μm is cotton. Figure 1 (A) is a photograph of a glass wool. On the other hand, a glass fiber (glass fiber) having a fiber diameter of 10 to 18 占 퐉 is known as a reinforcing material to be added to a thermoplastic resin or the like (see Fig. 1 (B)). The glass fiber is generally used as a loose strand obtained by cutting 50 to 200 pieces of fibers into a predetermined length. As shown in Figs. 1 (A) and 1 (B), the glass wool and the glass fiber are completely different from each other in the production method and the intended use. Further, when glass fiber is added to a resin or the like, it can not be extruded by the inflation method. Even if extruded by the T-die method, the glass fiber protrudes from the surface of a molded article such as a sheet and is easily torn. On the other hand, when glass wool is added, a grain pattern can be formed on the surface of a molded article, as shown in Examples described later.

The glass wool is produced by ejecting molten glass by rotating a spinner having many small holes of about 1 mm around it at a high speed. This manufacturing process is generally called a centrifugal method, and by adjusting the viscosity and rotational speed of the molten glass, a thin glass wool of about 1 to 7 mu m can be produced economically. The glass wool may be produced by the above method, or a commercially available glass wool may be used.

In the melting step, glass wool may be added to a molten resin to prepare a melt-kneaded product. However, master batch pellets containing a large amount of glass wool may be prepared in advance, and the master batch pellets and pellets not containing glass wool may be mixed do.

Master batch pellets containing glass wool may be prepared by a known method. Since the glass wool is an inorganic material and the resin or the like is an organic material, merely filling the glass wool with a resin or the like weakens adhesiveness between the glass wool and the resin or the like. Therefore, the glass wool may be surface-treated with a silane coupling agent and then added to a resin or the like.

The silane coupling agent is not particularly limited as long as it is conventionally used, and may be determined in consideration of reactivity with the resin, thermal stability, and the like. Examples thereof include silane coupling agents such as aminosilane series, epoxy silane series, allylsilane series, and vinylsilane series. These silane coupling agents may be commercially available products such as Z series manufactured by Toray, Dow Corning Inc., KBM series manufactured by Shin-Etsu Chemical Co., Ltd., KBE series, manufactured by JNC Corporation.

The silane coupling agent may be dissolved in a solvent, sprayed on a glass wool, and dried to perform surface treatment of the glass wool. The weight percentage of the silane coupling agent to the free wool is 0.1 to 2.0 wt%, preferably 0.15 to 0.4 wt%, more preferably 0.24 wt%.

Glass wool may be surface treated with a lubricant. There is no particular limitation on the lubricant as long as the slip of the glass wool is improved when the glass wool is kneaded in a resin or the like so that it can be easily filled into a resin or the like. A lubricant conventionally used such as silicone oil can be used, Particularly preferred. Silicone is an oil and therefore lacks in affinity with a resin. However, since the calixarene is a phenolic resin, it is preferable that the glass fiber is made of a phenolic resin, Resin, resin, etc.

The surface treatment of the glass wool is carried out by spraying a solution of calixarene dissolved in glass wool and drying. The solution in which the calixarene is dissolved can be produced by a known production method, and for example, a plastic modifier nanodaX (registered trademark) manufactured by NANO DACS Co., Ltd. may be used. The weight percentage of the plastic modifier nanodaX (registered trademark) to glass wool is preferably 0.001 to 0.5 wt%, more preferably 0.01 to 0.3 wt%.

The glass wool may be treated with the silane coupling agent or the lubricant, or may be treated with a silane coupling agent and a lubricant.

The glass wool may be surface-treated with a known film-forming agent such as an epoxy resin, a vinyl acetate resin, a vinyl acetate copolymer resin, a urethane resin or an acrylic resin in addition to the surface treatment with the silane coupling agent and / or the lubricant . These film-forming agents may be used singly or in combination of two or more, and the weight percentage of the film-forming agent is preferably 5 to 15 times the silane coupling agent.

In the melting step, a resin or the like, glass wool, and various additives to be added as required are kneaded at a temperature of 200 to 400 캜 using a known melt kneader such as a single or multi-screw extruder, a kneader, a mixing roller or a Banbury mixer And then melt-kneaded.

The content of the glass wool is preferably 1 to 20% by weight, more preferably 1 to 10% by weight, and particularly preferably 2 to 5% by weight. If the content of the glass wool is less than 1% by weight, it is difficult to form a grain pattern. On the other hand, when the content of the glass wool is more than 20% by weight, the strength of the molded article is lowered, which is not preferable. In the present invention, "content of glass wool" means weight of glass wool / (weight of thermoplastic resin and / or thermoplastic elastomer).

In the melting step, a known ultraviolet absorber, a stabilizer, an antioxidant, a plasticizer, a colorant, a coloring agent, a flame retardant, an antistatic agent, a fluorescent whitening agent, a gloss removing agent, Additives may be blended.

The extrusion process is not particularly limited as long as the melt-kneaded product produced in the melting process can be extruded from the discharge port of the extrusion die by an extrusion molding method to produce a molded article. For example, by extruding the melt-kneaded product from the annular discharge port, it is possible to extrude a slightly thick cylindrical shaped article. This manufacturing method is useful for a tube for filling cosmetics, foods, and the like.

In addition, a molded product may be produced by extruding a melt-kneaded product from an annular discharge port by an inflation method. The molded product produced by the inflation method may be cut into a flat film at one end before winding, but it may be a tubular product. When a cylindrical body is pressed with a roller having concave and convex portions, a thin film constituting the cylindrical body is adhered to the cylindrical body. Therefore, conventionally, it is impossible to produce a cylindrical body having irregularities by the inflation method. However, in the present invention, since the grain pattern is formed without embossing or embossing on the molded article by adding the glass wool to the resin or the like, it is particularly useful for the production of the tubular body by the inflation method. When a trash bag or the like is produced from a tubular body, since the grain pattern is formed on the surface, the envelope can be easily opened.

Further, in the extrusion step, a method of providing a mold having a linear discharge port called T (T) at the tip of an extruder, and extruding the material flatly to produce a molded article continuously (T-die method) may be used. In the T-die method, the film is cooled through a mirror-finished chill roller (chilled roller), and the width of the film is adjusted by cutting the end portion in the course of the final winding. Conventionally, a grain pattern is formed by using a roller having a concavo-convex portion as a part of the roller. However, in the present invention, since the grain pattern is formed on the surface of the film by adding glass wool to a resin or the like, it is not necessary to use a roller having irregularities. In order to further form the depth of the irregularities, the film on which the grain pattern is formed may be pressed with a roller having irregularities.

The molded article may be a single layer or a multilayer. In the case of multi-layering, co-extrusion, which is a method of extruding a plurality of materials at one time and overlapping them, may be performed in the extrusion step. For example, in the case of the inflation method, a die pre-lamination method in which the respective molten resins are brought into contact with each other in a feed block in front of the die, a die in-lay method in which the die is brought into contact with a path in the mold, Die external lamination method.

In the case of the T-die method, a single manifold method or a multi-manifold method may be used in which a feed block is provided immediately before a die and a plurality of extruders are connected to the feed block via an adapter. In the single manifold method, a resin or the like is contacted in a feed block, and then the film is formed through a die. The number of layers can be set by exchanging the adapter, and a multilayer film can be obtained relatively easily. In the multi-manifold method, a T-die having a plurality of manifolds therein is used, and the resin supplied from a plurality of extruders is brought into contact with and immediately before the discharge port. It is possible to co-extrude a material having a large difference in physical properties such as viscosity difference, and it is also easy to adjust the thickness of each layer.

The co-extrusion of the inflation method and the T-die method is a typical example of a method for producing a laminated molded article, and may be another manufacturing method as long as a laminated molded article is obtained, such as a lamination method. In general, when a molded article is produced by the extrusion molding method, the physical properties of the molded article are often different in the extrusion direction and the perpendicular direction. However, as shown in Examples to be described later, the molded article of the present invention also has the effect of reducing the difference in physical properties between the extrusion direction and the perpendicular direction by adding glass wool.

When the molded article is a laminated multilayer article, it is preferable that at least one of the layers outside the multilayer article is a layer obtained by extruding a resin or the like and a melt-kneaded product of the glass wool. By adding the glass wool, a grain pattern is formed on the outer layer, so that it is possible to provide a high quality and to prevent adhesion of the molded product. In the case of a multi-layered product, a layer obtained by extruding a resin or the like and a melt-kneaded product of the glassy cotton may be formed as a layer inside the multi-layered product. When the layer is formed as an inner layer, the specific surface area is increased by the grain pattern, so that the adhesiveness with the upper and lower layers is improved.

In the cooling step, the extruded melt-kneaded product may be cooled by a known method and cooled by, for example, air cooling or the like.

The shape of the molded article is preferably a film, a sheet, or a cylindrical body. Further, in the present invention, "film" means "film having a thickness of less than 250 μm" and "sheet" means "thin plate of plastic having a thickness of 250 μm or more" according to JIS (Japanese Industrial Standards) . The thickness of the molded article (film, sheet, tubular body) is not particularly limited as long as it is thicker than the diameter of the glass wool to be added and can be formed by the extrusion molding method, but is preferably about 3 to 300 mu m, more preferably about 5 to 275 mu m And more preferably about 8 μm to 250 μm. When the thickness is about 3 탆 or less, the molded article is too thin and easily torn. On the other hand, if it is at least about 300 탆, the grain pattern is formed to make it difficult for the film to adhere tightly, and the advantage of being able to reduce the difference in physical properties in the direction perpendicular to the extrusion direction of the molded product is small.

In the present invention, the term " molded product " means that the melt-kneaded product is extruded and cooled by extrusion molding regardless of whether it is a single layer or a multilayer. Therefore, the thickness of the molded article is about 3 to 300 占 퐉, which means the thickness of the sheet, film, or tubular article itself produced by the extrusion molding method, and does not mean the thickness of a product attached to a plate or the like.

The present inventor has filed a patent application for a composite forming material in which a glass fiber is filled in a thermoplastic resin (see Japanese Patent No. 5220934). However, the composite forming material disclosed in Japanese Patent No. 5220934 is an invention for lengthening the fiber length of the glass wool filled in the thermoplastic resin and increasing the filling amount of the glass wool, and the form of the article is the injection- And an injection-molded article. On the other hand, the molded article of the present invention is formed by extruding from a discharge port of an extrusion die. In the case of injection molding, a grain pattern is not formed on the molded article in that the composite molding material is injected into the mold. Therefore, the method for producing a molded article in which the grain pattern of the present invention is formed and the molded article formed with the grain pattern are different from the production method and the injection molded article described in Japanese Patent No. 5220934.

The molded article of the present invention may be used for civil engineering such as a waterproof sheet, a concrete molding waterproofing material, a roofing material, a decorative material, a floor waterproofing material, a civil engineering material such as a waterproof sheet and a pipe protection material, Such as cosmetics bottles, merchandise bottles, shopping bags, plastic bags, garbage bags, etc .; agricultural products such as multi-film, vinyl house, fertilizer bag, rice bag, food bag; And the like. If necessary, the molded product may be cut or heat-sealed for various uses.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail by way of examples, which are provided for the purpose of describing the present invention only and for the reference of specific embodiments thereof. These examples are intended to illustrate specific embodiments of the present invention but do not limit or limit the scope of the invention disclosed herein.

Example

[Preparation of master batch pellets]

Polypropylene (PP, manufactured by Sumitomo Chemical Co., Ltd., AZ564) was used as the thermoplastic resin. The glass wool was prepared by centrifugation and the average fiber diameter was about 3.6 μm.

The surface treatment of the glass wool was carried out by spraying a solution containing a silane coupling agent from a binder nozzle onto a glass wool fiberized from a spinner. As the silane coupling agent, an amino silane coupling agent S330 (manufactured by JNC) was used. The weight percentage with respect to the glass wool was 0.24 wt% of the silane coupling agent.

Thereafter, the glass wool was dried at 150 DEG C for 1 hour and then subjected to a crushing treatment with an average fiber length of 850 mu m by a cutter mill. (? 43 L / D = 40) manufactured by Berstorff) and a weighted screw feeder S210 (manufactured by K-Tron Co., Ltd.) as a metering device were used as the extrusion molding machine, Glass wool was added to the molten polypropylene so that the content of the glass wool was 40% by weight and kneaded. The kneading conditions were a screw rotation speed of 150 rpm, a resin pressure of 0.6 Mpa, a current of 26 to 27 A and a feed amount of 12 Kg / hr. The resin temperature of the polypropylene at the time of kneading was 190 ° C to 280 ° C, and the glass wool was heated to 100 ° C. After kneading, master batch pellets were prepared.

[Production of envelope by inflation method]

≪ Example 1 >

As an inflation device, CO-MP manufactured by Sumitomo Heavy Industries, Ltd. was used. First, master batch pellets and high density polyethylene (HDPE; HI-ZEX7000F manufactured by PRIME POLYMER) were blended to prepare a resin mixture so that the content of glass wool was 4.5 wt%. Next, the resin mixture was melted and kneaded at 180 ° C to 230 ° C to prepare a melt-kneaded product. Next, the melt-kneaded material was extruded from a circular discharge port to produce a cylindrical body (molded article). Then, the tubular body was cut to an appropriate size, and a part of the cut tubular body was heat-sealed to produce an envelope. The thickness of the envelope was about 35 탆. 2 (A) is a photograph of the envelope prepared in Example 1. Fig.

≪ Comparative Example 1 &

An envelope was produced in the same procedure as in Example 1 except that the master batch pellet was not added. The thickness of the envelope was about 28 mu m. Fig. 2 (B) is a photograph of the envelope produced in Comparative Example 1. Fig.

As can be seen from Figs. 2 (A) and 2 (B), the envelope produced in Example 1 had a grain pattern formed on the entire surface. On the other hand, the surface of the envelope prepared in Comparative Example 1 was smooth.

≪ Example 2 >

(LDPE: Sumikasen F200-0, manufactured by Sumitomo Chemical Co., Ltd.) instead of the high-density polyethylene of Example 1 so that the content of the glass wool was 2% by weight and the amount of air blown during inflation was adjusted, About 9 mu m, the same procedure as in Example 1 was used to produce an envelope. 3 is a photograph of the envelope prepared in Example 2. Fig. As can be seen from Fig. 3, the envelope prepared in Example 2 had a grain pattern formed on the entire surface. Also, the opening of the envelope could be opened simply.

≪ Example 3 >

Next, a two-layer film was produced by co-extrusion by the inflation method. One layer was prepared by blending master batch pellets and low density polyethylene (LDPE; Sumikasen F200-0, manufactured by Sumitomo Chemical Co., Ltd.) so that the content of glass wool was 10 wt%, melt-kneading the resin mixture at 210 캜, Water was produced. The other layer was formed into a melt-kneaded product in the same procedure as that of one of the layers, except that the master batch pellets were not added. Next, a melt-kneaded product is co-extruded from an annular discharge port by using CO-RD die rotation method (in-die laminating method in which the dies are brought into contact with each other through a path in the mold) manufactured by Sumitomo Heavy Industries, . The thickness of each layer was 75 mu m.

Fig. 4 (A) is a photograph of the layer side including the glass wool, and Fig. 4 (B) is a photograph of the layer side not including the glass wool. As can be seen from Figs. 4 (A) and 4 (B), the layer to which the glass wool was added had a grain pattern formed on the entire surface. On the other hand, the surface of the layer not containing the glass wool was smooth. In addition, each layer was firmly adhered without peeling.

<Example 4>

The same procedure as in Example 3 was repeated except that butyl rubber (Butyl065 manufactured by JSR Corporation) was used instead of the low-density polyethylene of Example 3 and the content of the glass wool of one layer was 2 wt% To prepare a laminated film. The thickness of each layer was 75 mu m.

Fig. 5 (A) is a photograph of the layer side including glass wool, and Fig. 5 (B) is a photograph of the layer side not including glass wool. As can be seen from Figs. 5 (A) and 5 (B), the layer to which the glass wool was added had a grain pattern formed on the entire surface. On the other hand, the surface of the layer not containing the glass wool was smooth. In addition, each layer was firmly adhered without peeling.

From the above results, it was made clear that by adding glass wool to a thermoplastic resin and / or a thermoplastic elastomer when a molded article is produced by the inflation method, a molded article having a grain pattern formed on the surface thereof can be produced without adding a special step .

[Production of film by T-die method]

&Lt; Example 5 >

The T-die apparatus was a SPS7000 manufactured by Sumitomo Heavy Industries & Machinery Co., Ltd. First, master batch pellets and high-density polyethylene (HDPE; HI-ZEX7000F manufactured by PRIME POLYMER) were blended to prepare a resin mixture so that the content of the glass wool was 4 wt%. Next, the resin mixture was melted and kneaded at 230 캜 to prepare a melt-kneaded product. Next, a melt-kneaded product was extruded from a T-die to produce a film. The thickness of the film was 30 mu m. 6 (A) is a photograph of the film produced in Example 5. Fig.

&Lt; Comparative Example 2 &

A film was produced in the same procedure as in Example 5 except that no master batch pellet was added. The thickness of the film was about 23 mu m. 6 (B) is a photograph of the film produced in Comparative Example 2. Fig.

As can be seen from Figs. 6 (A) and 6 (B), a grain pattern was formed on the surface of the film produced in Example 5. On the other hand, the surface of the film produced in Comparative Example 2 was smooth. From the above results, it was made clear that, by adding glass wool to the thermoplastic resin and / or the thermoplastic elastomer, a molded product having a grain pattern on its surface can be produced without adding a special step even in the T-die method. Therefore, even in a T-die apparatus in which rollers with irregularities are not disposed, a molded article having a grain pattern can be produced.

[Production of cylindrical body by extrusion method]

&Lt; Example 6 >

The extrusion apparatus was a tube apparatus P-50 manufactured by Mas Precision Machinery Co., Ltd. First, master batch pellets and high density polyethylene (HDPE; HI-ZEX5000SF manufactured by PRIME POLYMER) were blended so that the content of the glass wool was 2.5 wt% to prepare a resin mixture. Next, the resin mixture was melted and kneaded at 235 DEG C to prepare a melt-kneaded product. Next, the melt-kneaded product was extruded from the extruded circular die to produce a tubular body. Further, unlike the inflation method, the method of Example 6 does not send compressed air when the melt-kneaded product is extruded. The thickness of the tubular body was 60 mu m. 7 (A) is a photograph of the extruded tubular body. As can be seen from Fig. 7 (A), a grain pattern was formed on the surface of the manufactured tubular body.

Fig. 7 (B) is a photograph of the tubular body after printing. In the conventional method, the surface of the tubular body manufactured by the extrusion method became a mirror-finished surface, and it was difficult to print directly on the extruded tubular body, so the printed seal was attached to the tubular body. By adding glass wool to a resin or the like, a grain pattern is formed on the surface of the tubular body, so that it is possible to directly print on the tubular body.

Fig. 7 (C) is a photograph in which a spiral for locking the cap is formed on the tubular body by a heating press. The contents of cosmetics and the like are filled and then heat sealed to produce a molded article of a cylindrical body.

[Tensile Properties of Film Prepared by Inflation Method]

&Lt; Example 7 >

One layer was prepared by mixing master batch pellets, butyl rubber (Butyl065 manufactured by JSR Corporation) and HDPE (HI-ZEX7000F manufactured by PRIME POLYMER) so that the content of the glass wool was 2 wt%, and the other layer was glass A two-layer laminated film was produced in the same procedure as in Example 3, except that master batch pellets and high density polyethylene (HDPE; manufactured by PRIME POLYMER manufactured by HI-ZEX7000F) were mixed so that the content of the cotton was 2 wt%. The thickness of each layer was 75 mu m.

&Lt; Comparative Example 3 &

(HDPE; manufactured by PRIME POLYMER, manufactured by HI-ZEX7000F) and LDPE (produced by PRIME POLYMER manufactured by NEO-ZEX2006H) were mixed with one layer of the high density polyethylene (HDPE; , A laminated film of two layers was produced in the same procedure as in Example 3. [ The thickness of each layer was 75 mu m.

Next, tensile strengths of the films produced in Example 7 and Comparative Example 3 were examined. The tensile tester was carried out under the experimental conditions of KSM4394 using KSD3001: 2001 manufactured by Galdavini. The test results are shown in Table 1.

As can be seen from Table 1, the film to which the glass wool of Example 7 was added had almost the same strength in the extrusion direction and the vertical direction. On the other hand, the film to which the glass wool of Comparative Example 3 was not added had different extrusion directions and strength in the vertical direction. The inflation method is a method capable of forming a film or a sheet inexpensively and in a large amount, but it is one of the problems that the produced film or sheet has different longitudinal and transverse strengths. However, it has become clear that this problem can be solved by adding glass wool to a resin or the like.

[X-ray transmission phase of the produced film]

An X-ray transmission image of a film produced by the inflation method in Example 1 and a film produced by the T-die method in Example 5 was imaged. The X-ray transmission image was photographed using HITACHI CS-SEMCS4800 under conditions of 30 kV and 180 μA. Fig. 8 (A) is an X-ray transmission image of the film produced in Example 1, and Fig. 8 (B) is an X-ray transmission image of the film produced in Example 5. Fig. As can be seen from Fig. 8 (A), it was confirmed that the glass wool was dispersed in the random direction in the film. In Example 7, it was confirmed that the difference in strength between the longitudinal direction and the transverse direction of the produced film or sheet could be reduced by adding glass wool to a resin or the like. However, It is thought that it is dispersed. As can be seen from Fig. 8 (B), also in the film produced by the T-die method, the glass wool was dispersed in the random direction. Therefore, the molded product manufactured by the T-die method can also reduce the difference in strength between the longitudinal direction and the transverse direction.

With the method for producing a molded article in which the grain pattern of the present invention is formed, a molded article on which a grain pattern has been formed can be produced by using a conventionally used apparatus and without performing the uneven processing. Therefore, it is useful for the production of films, sheets, cylinders and the like.

Claims (10)

A melt process for producing a melt-kneaded product comprising at least a thermoplastic resin and / or a thermoplastic elastomer, and a glass wool,
An extrusion step of extruding the melt-kneaded product from a discharge port of the extrusion die by an extrusion molding method to produce a molded article,
And a cooling step of cooling the extruded molded article in the extrusion step. The method according to claim 1,
Wherein the content of the glass wool is 1 to 20 wt%. The method according to claim 1 or 2,
Wherein the extrusion molding method is an inflation method or a T-die method, and the molded article is a film, a sheet, or a cylinder. The method according to claim 1 or 2,
The extrusion molding method is a coextrusion method,
Wherein the molded article is formed as a laminated multilayer article,
Wherein at least one of the layers on the outer side of the multilayer article is a layer formed by extruding a melt-kneaded product containing at least the thermoplastic resin and / or the thermoplastic elastomer and the glass wool. The method of claim 3,
The above extrusion molding method is a co-extrusion by an inflation method or a co-extrusion by a T-die method,
Wherein the molded article is formed as a multi-layer article,
Wherein at least one of the layers on the outer side of the multilayer article is a layer formed by extruding a melt-kneaded product containing at least the thermoplastic resin and / or the thermoplastic elastomer and the glass wool. A thermoplastic resin and / or a thermoplastic elastomer, and a glass wool. The method of claim 6,
Wherein the content of the glass wool is 1 to 20% by weight. The method according to claim 6 or 7,
Wherein the molded article is a film, a sheet, or a cylinder-shaped, grain pattern. The method according to any one of claims 6 to 8,
Wherein the molded article is a multi-layer article,
Wherein at least one of the layers on the outer side of the multilayer article is a layer containing at least the thermoplastic resin and / or the thermoplastic elastomer and the glass wool. The method according to claim 8 or 9,
Wherein the molded article has a thickness of 3 mu m to 300 mu m.

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