JPH02264660A - Nipple for nursing bottle and production thereof - Google Patents

Abstract

PURPOSE:To obtain the nipple which is excellent in productivity and hygiene and the production process thereof by integrating a nipple body which consists of a thermoplastic resin and a cap part which consists of a thermoplastic resin joinable to the thermoplastic resin constituting the nipple body to constitute the nipple for a nursing bottle. CONSTITUTION:The nipple is formed by integrally molding the nipple body 1 having 18 to 45 JISA hardness and elasticity and the cap part 2 consisting of the thermoplastic resin joinable with the thermoplastic resin constituting this nipple body 1. More specifically, a styrene polymer, EVA polymer, silicone resin, diene polymer, etc., are used as the thermoplastic resin to form this nipple body 1. The cap part 2 is more specifically formed of polyolefin resins, such as polyethylene and polypropylene, ethylene copolymer resins, such as ethylene/ vinyl acetate copolymers, and polystyrene resins, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a nipple for a baby bottle and a method for manufacturing the same, and more particularly to a nipple for a baby bottle in which a cap portion and a nipple body are integrally molded, and a method for manufacturing the same. Regarding.

As shown in FIG. 4, the baby bottle nipple has a nipple body 1 and a cap part 2 having an opening 21 for fixing the nipple body 1. The nipple body 1 is attached to a baby bottle by screwing the nipple body 1 onto the baby bottle body (not shown) using the screw thread 22.

Since such nipples for baby bottles, especially the nipple body 1, are to be placed in the infant's mouth, they must be non-toxic and have excellent elasticity. It is used. On the other hand, cap 2
is for fixing the nipple body 1 to a baby bottle, and is made of plastic such as polyethylene.

In conventional baby bottle nipples, the nipple main body 1 made of silicone rubber or the like and the cap 2 made of plastic are manufactured separately and then combined.

In such conventionally known nipples, the nipple body 1 and the cap part 2 must be manufactured in separate processes as described above, resulting in poor productivity and the difficulty of combining the nipple body 1 and the cap 2. Since it is necessary to touch the nipple body 1 when doing so, there is a problem in that hygiene is poor.

Purpose of the Invention The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a nipple and a method for manufacturing the same, in which the nipple part and the cap part are integrated, and which is excellent in productivity and hygiene. The purpose is

Summary of the Invention The first nipple for a baby bottle according to the present invention consists of a nipple body made of a thermoplastic resin having a JIS A hardness of 18 to 45, and a thermoplastic resin that can be bonded to the thermoplastic resin constituting the nipple body. It is characterized by being integrated with the cap part.

Further, the first method for manufacturing a nipple for a baby bottle according to the present invention includes supplying a thermoplastic resin bondable to the thermoplastic resin constituting the nipple body into a gap corresponding to the shape of the cap in the mold,
The step of molding the cap part and supplying a thermoplastic resin having a JISA hardness of 18 to 45 into the gap corresponding to the shape of the nipple body in the mold, hardening it to form the nipple body and integrating it with the cap part. It is characterized by including the process of

The second baby bottle nipple according to the present invention includes a nipple body made of a thermoplastic resin having a JIS A hardness of 18 to 45, and a cap part made of a thermoplastic resin that can be bonded to the thermoplastic resin constituting the nipple body. and are integrated via an adhesive layer.

Further, in the second method of manufacturing a nipple for a baby bottle according to the present invention, a thermoplastic resin bondable to the thermoplastic resin constituting the nipple body is supplied to a gap corresponding to the shape of the cap in the mold to form the cap portion. The molding process, the process of supplying the resin for forming an adhesive layer onto the bonding position of the cap part with the nipple body, and the process of applying JIS A hardness of 1 to the gap corresponding to the shape of the nipple body in the mold.
The present invention is characterized in that it includes a step of supplying and curing a thermoplastic resin of No. 8 to 45 to form a nipple body and integrating the cap portion and the nipple body. DETAILED DESCRIPTION OF THE INVENTION A baby bottle nipple and a method for manufacturing the same according to the present invention will be specifically described below.

First, a first nipple for a baby bottle according to the present invention will be explained.

FIG. 1 is a cross-sectional view of a baby bottle nipple according to the present invention, and as is clear from this figure, the nipple according to the present invention conforms to the JIS standard.
An elastic nipple body 1 having an A hardness of 18 to 45 and a cap portion 2 made of a thermoplastic resin that can be bonded to the thermoplastic resin constituting the nipple body are integrally molded.

It is preferable that such a nipple body 1 is formed from a resin that is non-toxic or has extremely low toxicity.
Residue value due to normal heptane is 301 ft) III
It is preferable that the resin is made of the following resins. Furthermore, it is desirable that the nipple body 1 has a JAS A hardness of 18 to 45, preferably 30 to 40. If the JISA hardness of the thermoplastic resin constituting the nipple body 1 is less than 18, it will be too soft to be practical, while if it exceeds 45, the milk portion 4 will be too hard and there is a risk that it will be difficult for the infant to suck it. arise.

Further, the tensile strength of the nipple portion is preferably 80 k.
It is preferable that it is more than g/cJ. If this tensile strength is less than 80 kg/c-, durability tends to be poor.

Specifically, the thermoplastic resin forming the nipple body 1 is styrene-based polymer EVA-based polymer.
Silicone resins, diene polymers, etc. are used.

The cap portion 2 is made of a thermoplastic resin that can be bonded to the thermoplastic resin forming the nipple body 1 as described above, and specifically, polyolefin resins such as polyethylene and polypropylene, ethylene-vinyl acetate It is formed from ethylene copolymer resin such as copolymer, polystyrene resin, etc.

More specifically, it is preferable that the nipple main body 1 and the cap portion 2 are made of the following resin.

Nipple body Cap part SBS resin Polyethylene 5EBS resin Polypropylene polystyrene
In such a polystyrene cap part 2, it is preferable that through grooves 24 are intermittently formed in the flange part 23 along the circumferential direction, as shown in FIG. By injecting the thermoplastic resin constituting the nipple portion into the mold after forming the cap portion 2, the thermoplastic resin constituting the nipple flows into the through groove 24, forming the wedge 12 (see Fig. 1). Therefore, the cap part 2 and the nipple main body 1 are physically fixed in addition to the resins being bonded to each other, and are strongly integrated.

Next, a first method for manufacturing a nipple for a baby bottle according to the present invention will be explained.

In the present invention, as shown in FIGS. 3(a) and 3(b), first, a lower mold 3 having a gap 31 corresponding to the shape of the cap part, and an upper mold 4 having a protrusion 41 for forming a through groove. The cap portion 2 is molded by supplying resin to the void 32 in the mold.

Next, the cap portion 2 formed in this manner is placed on the lower mold 5, and a gap portion 61 corresponding to the shape of the nipple body formed by the lower mold 5 and the upper mold 6 is filled with a material for forming the nipple portion. A nipple as shown in FIG. 1 can be manufactured by supplying a thermoplastic resin and cooling and solidifying it. At this time, the thermoplastic resin forming the cap portion 2 and the nipple body are What is the thermoplastic resin?
By joining, a nipple in which the cap portion 2 and the nipple body 1 are integrated is obtained.

In this way, the resin constituting the nipple body 1 enters the through groove 24, and the cap portion 2 and the nipple body 1 are firmly integrated.

Although the above-mentioned baby bottle nipples are generally preferred for manufacturing methods for reusable nipples that require adhesive strength, for example, disposable nipples do not require so much adhesive strength.

Next, the second nipple for a baby bottle according to the present invention will be explained. In this first nipple for a baby bottle, the nipple body 1 made of the thermoplastic resin as described above and the cap part 2 are made of an adhesive layer. (not shown).

The adhesive layer is preferably formed from a resin that has adhesive properties to both the thermoplastic resin 1 forming the nipple body and the thermoplastic resin forming the cap portion 2,
Specifically, when silicone resin is used as the resin for forming the nipple body and polyethylene or polypropylene is used as the resin for forming the cap portion, silicone-based primer, acrylic-based primer, etc. are used.

The second nipple for a baby bottle according to the present invention is similar to the first nipple for a baby bottle, except that the above-mentioned adhesive layer-forming resin is supplied onto the position where the cap part is joined to the nipple body. It can be manufactured in the same manner as the nipple.

Effects of the Invention As explained above, the nipple for a breast milk bottle according to the present invention has the nipple main body and the cap part integrated, so that
It has the advantage of being highly productive and hygienic, and the manufacturing cost is low.

[Examples] The present invention will be explained below using Examples, but the present invention is not limited to these Examples.

Example A nipple for a baby bottle was manufactured using a mold as shown in FIG. 3, using 5EBS resin as the thermoplastic resin for forming the nipple and polyethylene as the resin for forming the cap.

First, 150
After supplying the resin for cap/tub formation which has been heated and melted at a temperature of An upper mold 6 was placed on the mold, and a thermoplastic resin was supplied into the gap formed by the upper mold and the lower mold.

The peel strength between the cap of the baby bottle nipple manufactured in this manner and the milk lamp body was 87 kg/cl, which indicates that the cap had good peel strength.

Further, the residue of distillation of the resin constituting the nipple body due to normal heptane was 19 ppm or less, and it was found that there was no toxicity.

The JIS A hardness of the nipple body was 38, and it was revealed that it had good performance as a baby bottle nipple.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a nipple according to an embodiment of the present invention, FIG. 2 is a plan view of a cap according to the specific example, and FIG. 3 is an explanatory diagram for explaining the manufacturing method according to the present invention. Moreover, FIG. 4 is a sectional view of a conventional nipple for a baby bottle. 1... Nipple body 2... Cap 3.5...
・Lower mold 4,6...lower mold agent patent attorney
Shunichi Suzuki Part 1 Figure 3 Figure 2 (b) Figure 7゜In the last line of page 7 of the amended description of contents, the words ``Lower Emi'' are corrected to ``Table 1.'' In the 1st to 4th lines of page 8 of the specification, the phrase ``Nipple body cap part S resin polytylene 5 EBS resin polypropylene 0 polystyrene polystyrene'' has been corrected to ``Table.'' Procedures Yes 1j Official document April 7, 1989 Baby bottle nipple and its manufacturing method Name Koshin Co., Ltd. Araku Building 3rd floor Voluntary correction

Claims (4)

[Claims] (1) A teat body made of a thermoplastic resin with a JISA hardness of 18 to 45 is integrated with a cap part made of a thermoplastic resin that can be bonded to the thermoplastic resin that makes up the nipple body. Nipple for baby bottle. (2) The process of molding the cap part by supplying a thermoplastic resin that can be bonded to the thermoplastic resin that makes up the nipple body into the gap corresponding to the shape of the cap in the mold and the shape of the nipple body in the mold. A method for manufacturing a nipple for a baby bottle, comprising the step of supplying a thermoplastic resin having a JISA hardness of 18 to 45 into the gap and curing it to form a nipple body and integrating it with the cap portion. . (3) The nipple body made of a thermoplastic resin with a JISA hardness of 18 to 45 and the cap part made of a thermoplastic resin that can be bonded to the thermoplastic resin constituting the nipple body are integrated via an adhesive layer. A nipple for a baby bottle characterized by: (4) Step of molding the cap by supplying a thermoplastic resin that can be bonded to the thermoplastic resin constituting the nipple body into the gap corresponding to the shape of the cap in the mold, and forming the cap at the position where the cap is joined to the nipple body. The process of supplying adhesive layer forming resin to the mold and the gap corresponding to the shape of the nipple body in the mold using JISA
A method for manufacturing a nipple for a baby bottle, comprising the steps of supplying and curing a thermoplastic resin having a hardness of 18 to 45 to form a nipple body, and integrating the cap portion and the nipple body.