JP3075776U - Multi-layer bottle by injection blow molding - Google Patents

Abstract

(57) [Summary] [Problem] To provide a multi-layered bottle by injection blow molding that can securely load contents such as cosmetics that must maintain a constant water content with materials such as PET that are suitable for environmental protection. . A bottle mouth having a spiral surface (11), which is a place where a lid is projected and screwed, is provided at an upper portion of a hollow bottle main body (10), and these materials are sealed inside and outside of the bottle so as to be airtightly wrapped. Different materials are used for the intermediate layer and each material is injected and guided to injection and blow mold the three layers at once.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a multi-layer bottle formed by injection blow molding, and in particular, the bottle body is divided into three layers, an inner and outer layer and an intermediate layer, and the inner and outer layers and the intermediate layer are made of different materials and are simultaneously injection blow molded. To prevent the liquid content from evaporating.

[0002]

[Prior art]

 Conventional bottles, especially cosmetic bottles such as eyeliners and mascaras, consist of a single layer made of PVC, which is highly airtight and evaporates the liquid content, making it difficult to reduce the water content. .

[0003]

[Problems to be solved by the invention]

 It is difficult to collect and reuse PVC, a material used in conventional bottles, and in developed countries in the United States and Europe, where environmental protection is advanced, production of PVC-based products has been drastically reduced. . However, especially for cosmetics such as eyeliners and mascaras, it is necessary to maintain a certain water content, so airtightness is important for containers. For example, the reduction rate of water content in general packaging containers is 5%. It is stipulated below that PET and PETG, etc., which are suitable for environmental protection, have air permeability more than twice that of PVC material and moisture evaporates easily. It is difficult.

[0004]

[Means for Solving the Problems]

 In order to improve the airtightness of the bottle so that the water content of the contents is not reduced, it is made of a material suitable for environmental protection such as PET and PETG, and the bottle body is made of different inner and outer layers and intermediate layers. The present invention provides an injection blown multi-layer bottle designed to be covered with three layers, wherein the three layers are formed by injection and blow molding at one time.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIGS. 1 to 5, the appearance of a main body 10 is not different from that of a bottle widely used in the market, and a lid is provided on the upper part of the main body 10, that is, around the opening of the bottle. A bottle mouth having a spiral surface 11 for fastening is provided.

As shown in FIG. 1 in particular, a guide rod 21 is provided at the center of the mold 20, and three communicating introduction devices are provided inside a diversion seat provided at one end of the mold 20 having an injection hole. is there . This is for introducing different materials in order from the introduction device. The layers are formed in the order of the materials injected onto the guide rods 21 in the mold 20, and a plurality of layers of different materials are formed. It is molded so as to cover the guide rod 21. After being molded into three layers, the semi-finished product is blown with high-pressure air from the outside and shaped according to the shape of the die, and then cooled to obtain a finished product as shown in FIGS.

[0007] The three-layer structure of the present invention has a structure in which the inner and outer layers are made of the same material and the intermediate layer is made of a different material. Blow molding to wrap the material with the different layers described above can achieve the purpose of being safe, not leaking, not permeating moisture and evaporating, and it can be applied to cosmetics such as mascara and eye liner. Are also suitable.

[0008] In addition, by performing split flow injection molding with the mold 20, multiple layers of different materials can be molded in the same mold 20. Then, by performing blow molding, molding is performed so as to cover only three layers. However, depending on the adjustment of the diversion seat, it can be set to be thickly covered with the inner and outer two layers.

[0009]

[Effect of the invention]

 According to the present invention, injection and blow molding are performed at one time, and the bottle mouth protruding from the upper portion of the bottle body is integrally molded as being sandwiched by a number of layers in the mold at the same time. The size of the spiral surface was stable, leak prevention was almost complete, and the appearance was beautiful. In addition, since different materials are used to cover, the airtightness is enhanced, the purpose of preventing the water content of the contents from being reduced can be achieved, and materials that are also suitable for environmental protection are used, making collection easier. Was.

[Brief description of the drawings]

FIG. 1 is an explanatory view when the present invention is put into a mold and injection molded.

FIG. 2 is an explanatory view when the present invention is put into a mold and blow molded.

FIG. 3 is an explanatory view after the present invention is put into a mold and blow-molded.

FIG. 4 is a sectional view of the present invention.

FIG. 5 is a perspective view of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main body 11 Spiral surface 20 Die 21 Guide rod

Claims (3)

[Utility model registration claims] The bottle body has a hollow shape, and has a bottle mouth having a spiral surface which is a place where the lid is screwed to protrude from the upper portion of the bottle, and a material different from the inside and outside of the bottle and the intermediate layer is used. An injection blow-molded multi-layer bottle characterized in that the material is injected and guided so as to be wrapped in an airtight manner, and three layers are injected and blow-molded at one time. 2. The injection blower according to claim 1, wherein the inner and outer layers of the bottle body are formed of the same material, and the intermediate layer is formed so as to be sandwiched by different materials, in order to enhance airtightness. Multi-layer bottle by molding. 3. The multi-layer bottle according to claim 1, wherein the bottle has only two layers, an inner layer and an outer layer.