JP3050113B2 - Blow molding method and molded products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blow molding method for blow molding a resin member, a glass member, a ceramic member or the like into a predetermined shape, and a molded product thereof. In the process of supplying the material between the mold cavity and the molded product, at least one of an electromagnetic wave shielding member, a coating member, an antibacterial member, an antistatic agent, and an optical film forming member is formed on the outer peripheral surface of the molded product. The present invention relates to a molded article provided with a coating made of any one of the functional members and a method of applying the coating.

[0002]

2. Description of the Related Art In recent years, electronic equipment such as television receivers, OA equipment such as copiers, and housings or structures constituting automobile parts are formed by means such as blow molding. Drinking containers and the like are similarly formed using glass members, ceramic members, or resin members.

[0003] For example, Japanese Patent Application Laid-Open Nos. 5-8287 and 5-318562 have proposed a method of manufacturing a container.

In Japanese Patent Application Laid-Open No. Hei 7-156256, a fibrous body made of glass or metal (a diameter of several hundred micrometers and a length of 5 mm) is used in the process of blow molding a resin member.
-10 mm) is supplied to the gap between the outer peripheral surface of the parison and the pair of molds, and the fibrous body is disposed on the surface of the molded article in the process of clamping the parison, thereby improving strength and strength. A blow molding method for forming a hollow body having excellent smoothness has been proposed.

On the other hand, a housing or the like which constitutes the electronic equipment is coated with an electromagnetic wave shielding member.

For example, Japanese Patent Application Laid-Open No. Hei 3-19697 proposes a housing in which a molded article having a hollow double-walled structure is formed by blow molding a resin member, and an electromagnetic wave shielding member is applied to the surface of the molded article. ing.

Means for disposing an electromagnetic wave shielding member on the inner surface of a hollow portion of a resin molded product is disclosed in, for example, JP-A-5-259.
No. 682 has been proposed. In this case, after the molding resin is cooled and solidified, the conductive paint is injected into the hollow portion.

[0008]

However, Japanese Patent Application Laid-Open No.
The processing means disclosed in Japanese Patent Application Publication No. 196697 has a problem in that the electromagnetic wave shielding member is applied separately from the forming step, so that the number of processing steps is required and the cost cannot be reduced.

When various structural members are formed by injection molding a resin member, means for mixing a conductive member (conductive filler) into the resin member to be used is also used.

However, also in this case, there is a case where the moldability of the resin member is reduced. For example, the fluidity of the resin may be reduced, or the surface quality state of the molded product may be deteriorated.

In JP-A-5-259682, since the conductive resin is injected into the hollow portion after the molding resin is cooled and solidified, the molding cycle becomes longer and the productivity is poor.
Furthermore, the present invention is applied to the field of injection molding using a gas assist method.

Japanese Patent Application Laid-Open No. Hei 7-156256 discloses a blow molding method for forming a hollow body having excellent strength and smoothness. The blow molding method has an electromagnetic wave shielding function, an antibacterial function, an optical film function and the like on the surface of a molded product. It does not aim at the configuration of the antistatic function. Further, the size of the fiber member contained in the high-pressure gas is as large as several hundred micrometers in diameter and 5 mm to 10 mm in length, and is not in the form of fine powder particles, liquid or gas.

According to the present invention, a thin film layer or coating such as an electromagnetic wave shielding member, a paint member, an antibacterial member, an antistatic agent or an optical film is applied to the outer surface of the parison in contact with the inner surface of the mold cavity in a blow molding process. Accordingly, an object of the present invention is to provide a blow molding method and a molded product having an electromagnetic wave shielding function and the like easily and inexpensively.

[0014]

Means for Solving the Problems In order to solve the above-mentioned problems, a molded article having a hollow portion or the like according to the present invention uses a pressure fluid containing a functional member in blow molding.

More specifically, a step of supplying a plasticized parison into a mold, and then introducing a pressure fluid containing a functional member between the outer peripheral surface of the parison and the mold cavity to form a molded product. And a blow molding method for forming a coating layer or a coating made of a functional member on the outer peripheral surface of the molded article.

As the functional member, at least one of a conductive member or a magnetic member, a paint member, an antibacterial member, an antistatic agent, an optical film forming member, or a combination thereof for the purpose of shielding electromagnetic waves. Of the member.

Further, the above-mentioned paint member is used as a conductive paint in addition to a general paint. The functional member to be included in the pressure fluid may be injected in any state of liquid, solid, and gas. For example, a high-pressure gas (high-pressure gas) made of compressed air or the like of 8 kg / cm ² or less is supplied in a form mixed with a fine powder particle-shaped conductive member having an outer dimension of 0.01 μm to 100 μm. Do it.

Further, the timing of supplying the functional member to the blow molding material (parison) is arbitrarily set. For example, when supplying a high-pressure gas containing powdery or flake-like conductive filler, the process is performed before the resin in the mold cavity is cooled and solidified.

Of course, after the shape of the product is formed, a high-pressure gas containing a functional member may be supplied continuously before the resin is cooled and solidified.

Alternatively, a pressurized gas may be supplied to the parison in advance, and then a high-pressure gas containing a functional member may be introduced between the outer peripheral surface of the parison and the mold cavity.

Alternatively, a high-pressure gas containing a functional member may be introduced between the outer peripheral surface of the parison and the mold cavity, and then a pressurized gas may be introduced into the parison for molding.

Further, a pressurized gas may be simultaneously supplied to the inside of the parison and the outside of the parison.

In any of the above cases, it is desirable to supply the pressure fluid containing the functional member while the blow molding material (parison) is adhesive and has the ability to adhere the functional member.

However, after the molding material after molding is cooled and solidified, a high-pressure gas containing a functional member may be injected.

Furthermore, a binder such as PVA (polyvinyl alcohol), an acrylic resin, a polyurethane resin, an adhesive resin, a diluting solvent or the like is added to the high-pressure gas at an arbitrary ratio so that the functional member does not peel off from the adhesion surface. May be included.

Further, the conductive paint may be any solvent such as alcohol, toluene, thinner and acetone, or PVA (polyvinyl alcohol) in addition to the conductive filler.
Needless to say, such as epoxy resin, thermoplastic resin such as acrylic resin, vinyl chloride resin, ABS resin, PS resin, polyamide resin, polycarbonate resin, styrene resin, polybutylene terephthalate resin, etc. It is the same that a predetermined amount of the resin member may be included.

As the conductive filler contained in the conductive member or the conductive paint, silver, copper, brass, iron, zinc, AL, Ni, stainless steel, carbon or the like, or any combination thereof, It may be embodied in any form, such as in the form of a fine powder or flakes having a size of 0.5 to 100 μm. As a matter of course, the size and shape suitable for being included in the high-pressure gas may be different from the size and shape suitable for being included in the conductive paint.

[0028] Further, a magnetic member may be used instead of the conductive member. When the electromagnetic wave shielding member is made of a metal member, the electromagnetic wave is reflected. On the other hand, when a coating layer is formed by supplying a high-pressure gas containing ferrite powder, which is a modification of ceramics, or a mixture of a ferrite powder with a binder, a solvent, a resin member, or the like, the coating layer is supplied. When formed, the electromagnetic waves are absorbed and become heat energy, which attenuates or disappears.

The magnetic member other than ferrite is silicon,
A magnetic metal such as iron, nickel, and cobalt may be used as a powder, or a soft magnetic alloy such as iron-silicon, iron-nickel, iron-cobalt, iron-aluminum or the like may be powdered or flaked.

It should be noted that the pressure fluid may be heated to a predetermined temperature to facilitate molding, accelerate the curing of the molded article, or facilitate the attachment of the functional member to the molding material.

Further, the present invention may be arbitrarily implemented as a parison member constituting a molded product. For example, ABS, PS, P
A resin member such as P, PMMA, PE, or PET, a glass member, or a ceramic member such as alumina, forsterite, silicon nitride, or silicon carbide may be used.

Further, a biodegradable plastic may be used. For example, a denatured protein material such as gluten, a material obtained by kneading paper and denatured protein, an agar material, a material obtained by kneading potato starch with water, a natural polymer Novamont (trade name: Materby / Nippon Synthetic Chemical Industry), a microorganism-producing material Polyester-based ICI (trade name: Biopol / ICI Japan), chemically synthesized aliphatic polyester (trade name: Bionole / Showa Kobunshi), and the like may be used arbitrarily.

Further, the functional member may be an antibacterial member, an antistatic agent, an optical film forming member or the like in addition to the electromagnetic wave shielding member. The optical film may be applied to a drinking bottle or the like to cut off ultraviolet rays or infrared rays, or may be used for the purpose of preventing reflection in an optical component.

As the optical film forming member, any member such as a gas, a liquid, and a coating material in which fine powder is dispersed may be used. For example, in the case of gas, a gas such as conductive tin oxide or conductive indium oxide is introduced between the outer peripheral surface of the parison and the mold cavity by means of CVD (chemical vapor deposition / chemical vapor deposition), A predetermined temperature, for example, about 16
The film is formed at a temperature of about 0 ° C.

Alternatively, S may be formed by means such as sputtering.
introducing i0 ₂ and between the parison outer peripheral surface and the mold cavity may be so disposed.

Further, a coating composition in which fine powder of conductive tin oxide or conductive indium oxide is dispersed is contained in a high-pressure gas and introduced between the outer peripheral surface of the parison and the mold cavity,
The film may be formed while maintaining a temperature atmosphere of about 160 ° C. for several tens of seconds to several minutes.

Further, a high-pressure gas containing, for example, a product of Samco International Laboratories (see Nikkei Inc., 1995.6.17) for forming a thin film of a Si oxide film as a liquid raw material is supplied to the outer surface of the parison and the mold cavity. And a film may be formed in a temperature range from normal temperature to 350 ° C.

Further, as the antistatic agent, non-ionic,
Examples include anionic, cationic, and amphoteric surfactants. For example, non-ionic compounds include polyoxyethylene alkylamine, polyoxyethylene alkylamide, polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, glycerin fatty acid ester, sorbitan fatty acid ester and the like.

In the case of anionic compounds, alkyl sulfonates, alkyl benzene sulfonates, alkyl sulfates,
And alkyl phosphates.

In the case of the cationic type, quaternary ammonium chloride, quaternary ammonium sulfate, etc.
In the amphoteric system, alkyl betaine, alkyl imidazoline, alkyl alanine and the like can be mentioned. These may be contained in a high-pressure gas in a liquid or polymer state and introduced between the outer peripheral surface of the parison and the mold cavity.

Of course, metal powder such as conductive tin oxide (particle size of about 1 to 5 μm) may be contained in a high-pressure gas and introduced between the outer periphery of the parison and the mold cavity.

As the antibacterial member, zeolite, chitosan, mugwort, hinoki and the like are used.

Zeolites cut off the living environment of attached bacteria by mixing several percent of antibacterial ceramics containing a bactericidal substance such as silver, copper or zinc into plastics such as polypropylene.

Chitosan is a natural polysaccharide that is often contained in crab shells and shrimp shells and has antibacterial and antifungal properties. The ratio of 0.3% to several% mixed with or applied to the plastic is sufficient, and the particle size is 5%.
Fine powder of less than micron meter.

The mugwort contains tannin contained in mugwort to provide antiallergic and antipruritic effects, and chlorophyll (chlorophyll) to provide bactericidal and bacteriostatic effects. Microcapsules of a micrometer may be applied or mixed.

Hinoki plays the role of a preservative to prevent tropilone contained in hinoki from attracting bacteria, mold, etc., and may be used as microcapsules having a particle size of several micrometers as in other antibacterial members.

Further, a nitrogen gas, an inert gas (eg, argon gas) or the like may be used as the pressure fluid in addition to the compressed air.

According to the present invention, the characteristics of the resin member used for molding are not changed by the above configuration. Also, an arbitrary structure or a curved surface shape can be configured according to the variety of designs and the purpose of use. Of course, the quality of the molded product does not deteriorate.

Furthermore, a relatively smooth thin functional coating layer can be formed in parallel with the molding process, and the work of forming the coating layer such as an electromagnetic wave shielding member in a separate step is not required. Therefore, the process can be simplified and the cost can be reduced.

[0050]

DETAILED DESCRIPTION OF THE INVENTION The invention according to claim 1 of the present invention relates to a blow molding method in which an extruded parison is sandwiched by a mold and a pressurized gas is blown into the parison.
In the process of clamping the parison in the mold, a pressurized gas containing a functional member in one of a powder particle state, a liquid state, and a gas state is introduced between the mold and the outer peripheral surface of the parison. It is a blow molded product characterized by having a coating of a functional member on the outer peripheral surface of the parison, thereby forming a relatively smooth thin functional coating layer in parallel with the molding process, This eliminates the need for a separate step of forming a coating layer such as an electromagnetic wave shielding member. Therefore, the process is simplified and the cost can be reduced.

According to a second aspect of the present invention, there is provided a blow-molded article according to the first aspect, wherein the pressure gas containing the functional member further includes an adhesive member. It has the effect that the functional coating can be more reliably adhered to the molded article.

Next, according to the third aspect of the present invention, a functional member in a powder particle state, a liquid state or a gaseous state is used as a conductive member, a magnetic member, a paint member, an antibacterial member, or a charged member. 3. A blow-molded product according to claim 2, wherein the blown-molded product is at least one of an inhibitor and an optical film-forming member. This eliminates the need for an operation of forming a coating layer such as an electromagnetic wave shielding member.

The blow molding according to the third aspect of the present invention is characterized in that the outer dimensions of the powdery particulate functional member are set to 0.01 μm to 100 μm. A relatively smooth thin functional coating layer can be formed in parallel with the molding process.

Next, according to a fifth aspect of the present invention, the conductive member is made of silver, copper, brass, iron, zinc, AL, Ni, stainless steel, or carbon. 4. A blow-molded article according to claim 3, wherein a conductive coating layer can be formed in parallel with the molding process, and the work of forming the coating layer of the electromagnetic wave shielding member in a separate step is performed. It has the effect of making it unnecessary.

In a sixth aspect of the present invention, the magnetic member is a blow molded article according to the third aspect, wherein the magnetic member is a ferrite powder. A layer can be formed, and an operation of forming a coating layer such as an electromagnetic wave shielding member in another step is not required.

Next, according to a seventh aspect of the present invention, there is provided a blow-molded article according to the third aspect, wherein the paint is a conductive paint. The coating layer can be formed, and the operation of forming the coating layer of the electromagnetic wave shielding member in a separate step is not required.

Next, the invention according to claim 8 is a blow molding method in which an extruded parison is clamped by a mold and a pressurized gas is blown into the parison, wherein the parison is clamped by the mold. A blow-molded article characterized in that the functional member is embedded in the outer peripheral surface of the parison by introducing a pressure gas containing a functional member made of powder particles between the mold and the outer peripheral surface of the parison. The functional member can be buried in the surface of the molded article in parallel with the molding process, and has the effect of eliminating the need for a separate step of forming a functional coating layer such as an electromagnetic wave shielding member.

Next, according to a ninth aspect of the present invention, the functional member is at least one of a conductive member, a magnetic member, an antibacterial member, and an antistatic agent. It is a molded product, and has the function of embedding the functional member on the surface of the molded product in parallel with the molding process, eliminating the need for forming a functional coating layer such as an electromagnetic wave shielding member in a separate process. Have.

Next, according to a tenth aspect of the present invention, in a blow molding method in which an extruded parison is sandwiched between a pair of molds and a pressurized gas is blown into the parison, the parison is sandwiched by the molds. In the process, between the mold and the parison outer peripheral surface, a pressure gas containing a functional member consisting of any one of a powder particle state, a liquid state, and a gaseous state is introduced to introduce a functional property to the parison outer peripheral surface. This is a blow molding method characterized by applying the coating of the member, and a functional coating layer can be formed in parallel with the molding process, and a functional coating layer such as an electromagnetic wave shielding member is formed in a separate process. Is unnecessary.

Next, the invention according to claim 11 is the blow molding method according to claim 10, wherein an adhesive member is further included in the pressurized gas containing the functional member. The functional coating layer can be more securely adhered in parallel with the molding process, and has the effect of eliminating the need for an operation of forming a functional coating layer such as an electromagnetic wave shielding member in a separate step.

Next, according to a twelfth aspect of the present invention, in a blow molding method in which an extruded parison is held between a pair of dies and a pressurized gas is blown into the parison, the parison is held between the dies. Before the parison is solidified in the process, by introducing a pressurized gas containing a functional member consisting of any one of a powder particle state, a liquid state, and a gas state between the mold and the parison outer peripheral surface, A blow molding method characterized by applying a coating of a functional member to the outer peripheral surface of the parison, wherein a functional coating layer can be formed in parallel with the molding process, and the function of an electromagnetic wave shielding member or the like can be formed in a separate step. This has the effect of eliminating the need for the work of forming the conductive coating layer.

Next, the invention according to claim 13 is the blow molding method according to claim 12, wherein an adhesive member is further included in the pressurized gas containing the functional member. The functional coating layer can be more securely adhered in parallel with the molding process, and has the effect of eliminating the need for an operation of forming a functional coating layer such as an electromagnetic wave shielding member in a separate step.

Next, in a blow molding method in which the extruded parison is sandwiched by a pair of molds and a pressurized gas is blown into the parison, the parison is sandwiched by the molds. After the parison is cooled and solidified in the process, by introducing a pressurized gas containing a functional member consisting of any one of a powder particle state, a liquid state, and a gas state, between the mold and the outer peripheral surface of the parison. A blow molding method characterized by applying a coating of a functional member to the outer peripheral surface of the parison, wherein a functional coating layer can be formed in parallel with the molding process, and the function of an electromagnetic wave shielding member or the like can be formed in a separate step. This has the effect of eliminating the need for the work of forming the conductive coating layer.

Next, the invention according to claim 15 is the blow molding method according to claim 14, wherein an adhesive member is further included in the pressure gas including the functional member. The functional coating layer can be more securely adhered in parallel with the molding process, and has the effect of eliminating the need for an operation of forming a functional coating layer such as an electromagnetic wave shielding member in a separate step.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment) FIG. 1 is a conceptual diagram of a blow molding apparatus according to an embodiment of the present invention. In FIG. 1, the screw cylinder 6 is provided with a heating means and a hopper (not shown),
The thermoplastic resin member 10 supplied from the hopper is heated by the screw cylinder 6 and sent to the plunger 40 of the accumulator 4 while melting.

Below the accumulator 4, a pair of split molds 1, 1 having a predetermined concave portion (cavity) and being openable and closable, are provided. The molten resin member 10 extruded by the plunger 40 is extruded into the gap between the dies 1 and 1 while being formed as a cylindrical parison 11 by the die 5 provided at the lower end of the accumulator 4.

When the parison 11 is pushed out to a predetermined length, the driving of the plunger 40 is stopped, and the blow pin 2 is moved to the inner periphery of the parison 11 which can be clamped by the dies 1, 1.
Insert The blow pin 2 communicates with a pressurized air source 3 via a valve or the like (not shown) to supply only pressurized air.

The supply pipe 31 is formed of a pipe penetrating the molds 1 and 1 and communicating with the pump 30 for supplying the high-pressure gas containing the functional member 7 alone or the functional member 7.

Here, when the dies 1, 1 are closed (closed) by driving means (not shown), as shown in FIG. 2, the upper part of the parison 11 is clamped by the dies 1, 1. The lower portion is sandwiched between the dies 1, 1 with the blow pin 2 protruding from the inner periphery.

Thereafter, a valve (not shown) is opened and a high-pressure gas containing the functional member 7 from the supply line 31 or a high-pressure gas containing the functional member 7 and the binder, or the high-pressure gas containing the functional member 7 and the adhesive Any one of the high-pressure gas and the like is supplied to the gap (cavity) between the outer peripheral surface of the parison 11 and the mold, and the functional member is filled in the cavity and adheres to the surface of the parison 11.

Next, pressurized air is supplied from the blow pin 2 to the inner peripheral side of the parison 11, and the parison is expanded along the cavity shape of the mold so as to be in close contact with the mold and molded.

According to the above-mentioned process, the functional member is buried in the surface of the molded article at a predetermined rate or disposed so as to form a coating layer having a predetermined thickness.

FIG. 3 shows a hollow molded article 12 provided with a functional member on the outer peripheral surface. As the functional member in this case, for example, a single metal powder of nickel, copper, silver or the like having a particle size of 0.5 to 100 μm, or a mixture of the metal powder and a binder such as acryl or polyurethane (of course, , May contain a solvent).

In this embodiment, the average thickness of the molded product 12 is 2.3 mm, and the thickness of the functional member 7 is in the range of several micrometers to several hundreds of micrometers.

When the coating layer is a single powder particle, the thickness is several micrometers to 50 micrometers, and when a mixed member of a metal powder and a binder is provided, the thickness is about 20 to 100 micrometers. And

As described above, in the molded product 12, the outer layer of the structure can be blow-molded and the coating layer 7 made of the electromagnetic wave shielding member can be formed on the outer peripheral surface at the same time, thereby improving the productivity.

In the above embodiment, an example was described in which a high-pressure gas containing a functional member was supplied before the parison resin was solidified. However, the functional member was injected and injected after the resin was solidified. Even so, it does not matter. In this case, it is desirable to previously mix the adhesive member with the functional member. Of course, the functional member may be a conductive paint or the like.

Further, even if a high-pressure gas containing a functional member is heated to a predetermined temperature and supplied, there is no problem.

Further, a step of supplying the pressurized air to perform blow molding and a step of supplying a high-pressure gas containing a functional member between the outer peripheral surface of the parison 11 and the mold to form a coating layer. It is the same that the above-described embodiment may be performed in the reverse order. Of course, both the pressurized air may be supplied to the inner periphery of the parison and the high-pressure gas containing the functional member may be supplied to the outer peripheral surface at the same time.

Further, it goes without saying that the present invention is not limited to the blow molding of the resin member, but may be similarly carried out in the molding of a glass member, the molding of a ceramic member, or the like.

As another embodiment of the present invention, a cross-sectional shape of an example of a drinking bottle container in which a high-pressure gas containing a functional member is supplied in a blow molding step and a thin film layer 201 is provided on the outer peripheral surface side is shown. As shown in FIG.

In the above embodiment, the cavity forming surface of the mold is coated with a silicon resin member, a SiC member, ethylene tetrafluoride (trade name of Teflon / Dupont), a polyethylene or a polyimide resin member, and the like. It may be configured to prevent the adhesive member from attaching.

Further, it is needless to say that any other member besides the above may be constituted as the functional member.

Further, the supply conduit 31 for supplying the functional member
The position of disposing them in the dies 1 and 1 is not limited to the upper part of the separate dies, but may be a central part or a lower part, or may be disposed in a plurality of places.

[0085]

As described above, according to the blow molding method of the present invention, a functional member can be buried on the outer peripheral surface of a molded product, or a relatively smooth thin film layer can be provided in a predetermined manner. ,
An electromagnetic wave shielding function, a coating film, an optical film, an antibacterial film, an antistatic film, or the like can be formed at low cost.

Of course, there is no adverse effect on the molding characteristics of the molded member, for example, the resin member. Further, since the electromagnetic wave shielding member and the like are integrally formed in the molding process, the work of forming the electromagnetic wave shielding member and the like in a separate step from the molding is not required.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a blow molding apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory view of mold clamping and blow molding of FIG. 1;

FIG. 3 is a sectional view of the molded product of FIG. 1;

FIG. 4 is a sectional view of another molded article in the embodiment of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 mold 1A gap 2 blow pin 3 pressurized air source 7 functional member 11 parison 12 hollow molded product 30 pump 31 supply conduit 200 polyester bottle 201 coating layer

Claims (5)

(57) [Claims] In a blow molding method in which an extruded parison is sandwiched between a pair of molds and a pressurized gas is blown into the parison, the opened mold is closed to sandwich the parison, and then the closed mold is closed. Between the inner surface of the mold and the outer surface of the parison, the magnetic member, the antibacterial member, the antistatic agent, the magnetic member on the outer surface of the parison by introducing a pressure gas containing at least one of the optical film forming member, A blow-molded article provided with at least one of an antimicrobial member, an antistatic agent, and an optical film forming member. 2. The blow molding according to claim 1, wherein a pressure gas containing at least one of a magnetic member, an antibacterial member, an antistatic agent, and an optical film forming member further includes an adhesive member. Goods. 3. The blow-molded article according to claim 1, wherein the optical film forming member is any one of conductive tin oxide, conductive indium oxide, and silicon oxide. 4. A blow molding method in which an extruded parison is sandwiched by a pair of molds and a pressurized gas is blown into the parison. Between the inner surface of the mold and the outer peripheral surface of the parison, a magnetic member, an antibacterial member, an antistatic agent, the magnetic member on the outer peripheral surface of the parison by introducing a pressure gas containing at least one of an optical film forming member, A blow molding method, comprising providing at least one of an antimicrobial member, an antistatic agent, and an optical film forming member. 5. The blow molding according to claim 4, wherein a pressure gas containing at least one of a magnetic member, an antibacterial member, an antistatic agent, and an optical film forming member further includes an adhesive member. Method.