JPH02112177A - Connector - Google Patents

Abstract

PURPOSE:To improve productivity of a connector by composing a component material thereof of the component of polybutyleneterephtharate resin of specific maximum viscosity including filler of silica, metallic salt of fatty acid and organopolysiloxane or its compound. CONSTITUTION:A component material of a connector is composed of polybutyleneterephtharate resin of maximum viscosity of 0.60 to 1.50dl/g including filler of silica, metallic salt of fatty acid and organopolysiloxane or its compound. Brending ratio of the filler of silica, metallic salt of fatty acid and the organopolysiloxane or its compound are 0.01 to 3.00wt.%, respectively. These component are molded by injection molding to form a connector. Accordingly, solidification of melted resin in a molding die is accelerated. Further, the resin thus solidified in the molding die is easily picked up therefrom. Thus, molding cycle is shortened, so that productivity is improved.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to polybutylene lenticules 1 to 1 (hereinafter referred to as rP
This invention relates to a resin connector (referred to as BTJ).

(Conventional technology and its issues) Among the plus book connectors obtained by injection molding, those made of PBT resin have excellent heat deformation resistance, i4 chemical resistance, and method 1 stability, so their usage will increase significantly in the future. It is considered a thing. Particularly in the case of connectors for automobile wire harnesses, it is thought that the replacement of other materials such as poly)7mide, which have been used in the past, with the above-mentioned high-performance PBT resin will progress significantly. On the other hand, connectors for automobiles are required to have more complex shapes due to the increase in required functions, thinner walls for the purpose of reducing cost and weight. Therefore, there is a strong demand for improved productivity.

However, with conventional PBT resin connectors, the solidification rate of the molten resin in the mold during injection molding is slow, and the mold release performance from the mold is also poor, making the molding cycle difficult and causing the above-mentioned problems. The problem was that it was not possible to improve productivity.

(Object of the Invention) An object of the present invention is to solve the problems of the prior art described above and provide a connector with excellent productivity.

(Means for Achieving the Object) In order to achieve the above object, the nectar of the present invention contains 001 to 300161% by weight of a silica filler, 001 to 300% by weight of a metal salt of a fatty acid, and an organopolysiloxane or A Runo J Nopolicy 1111 Non Compound 00
Contains 1 to 3,00% stone/j Intrinsic viscosity 0.60 to
1.50dj! /! ? Voliv Y Wrench Leftare 1~
It is composed of m-fat composition.

(Example of Actual Flow) Nectar, which is an embodiment of the present invention, has a silica filler of 0.01 to 3.00% and a fatty acid metal salt of 0.00%.
01 to 300% by weight and organopolysiloxane or organopolysiloxane [1 Kirin compound is 0.01 to 3.0% by weight]
Limiting viscosity peak number 0.60 to 1.50d containing 0Φ amount%
1/g polyethylene terephthalate (rPB king)
The connector is made of a resin composition (referred to as ``J''), and the composition is molded by index molding to produce a connector.

The above composition has a high assimilation rate at the stage of molten resin in the mold (-) during molding according to Rule 111, significantly shortens the cooling time of the molten resin, and has good adhesion with the mold material after solidification. Low mold releasability, shortened molding cycle =
1 nectar productivity improves.

Next, each component will be exemplarily explained.

First, P[31-resin (,1, for example, one produced from 1./I-butanediol and dimethyl j-renotare-1- is used, but instead, if necessary during production]-
A polymer co-condensed with a small amount of a third component such as ethylene glycol, 1,3-propanediol, or dicarboxylic acid other than -jlenocric acid may also be used.

This actual flow example C has an intrinsic viscosity [η] of 060 to 1.50 d at 30°C in a /10/60 (wt%) mixed solvent of Te1~lac[1ru]-tane/phenol. , f! /J P F3 T resin is used.

The intrinsic viscosity number "η1" may be within the range listed in 1, but in particular
It is more preferable if it is within the range of 07()-・140(jj!/!7.A′3, the intrinsic viscosity number [η] is 060
d1/! ? On the following platforms, the mechanical strength of the composition is significantly reduced and the strength of the nectar is low.
In the case of less than 50 (l i /sheet), the fluidity is so low that the molten resin cannot be smoothly filled into the mold, resulting in incomplete filling and the like, making index molding difficult.

Silica-based fillers include silica, silica/alumina, glass powder or glass peas, and talc.

Examples include diatom, clay, mica, and whitebait.

The amount added may be within the range of 0.01 to 3.00% by weight, and more preferably within the range of 0.02 to 1,00% by weight. In addition, at 001% by weight or less,
The molding cycle cannot be shortened, resulting in poor productivity; 3.
Examples of metal salts of 1° fatty acids, which are undesirable since the 1JvJI impact strength of the resulting connector is lowered by 00% by weight or more, include saturated or unsaturated fatty acids such as sodium, potassium, beryllium, magnesium, calcium, lithium, and aluminum shim.

Salts of lead, zinc, etc. are exemplified, and among these, salts of stearic acid are particularly preferred, such as calcium stearate,
Examples include calcium stearate and zinc stearate. The blending amount of fatty acid metal salt is 00
It may be within the range of 1. to 3.00% by weight, especially 0.00% by weight.
It is more preferable if it is within the range of 0.02-, 1.00%. Note that below 0.01% by weight, productivity is poor;
If it is more than 0% by weight, it is not preferable because the mechanical strength of the nectar decreases or a bleeding phenomenon occurs in which metal salts of fatty acids migrate to the surface of the nectar.

Organopolysiloxane oil is generally used in various applications such as water repellents, antifoaming agents, release agents, lubricants, and sealants, and is the most common Hydrogen or other non-reactive organic groups such as hydrogen, )]nyl group, or ]7-polysilicone, or amino group, vinyl group, (meth)acrylic group It includes Δluganopolysiloquinone with functional stone groups such as.

The compound, ie, the organopolysilyl 4-zan compound, is dimethylpolysil.

Right J
A-kanoborisiloxanes: organopolysiloxanes having hydrogen directly bonded to silicon atoms such as methylhydrodidine polysiloxane, dimethylborisiloxane methylhydrodiene polysiloxane cocondensates; diphenylpolysiloxane, dimylsiloxane, Mebruphenylpolysiloxane, epoxy-modified dimethylsiloxane.

Examples include amino-modified siloxane.

The compounding amount of the compound in organopolysilone 1 may be within the range of 0.01 to 3.00% by weight, and more preferably within the range of 0.02 to 1,00% by weight. . In addition, if it is less than 0.001% by weight, the productivity will be poor, while if it is more than 3.00% by weight, the mechanical power of the connector will be reduced.
In particular, it is undesirable because the twist strength decreases.

In addition, in the composition made of the above-mentioned materials, the stiffness t'1. W can be improved. In addition, a nucleating agent, a l1llt type agent, a coupling agent, a coloring agent, a lubricant, a heat stabilizer, a weather stabilizer, a flame retardant, a flame retardant aid, a plasticizer, etc. may be added.

Furthermore, if necessary, polyethylene terephthalate 1 to
．． Polyamide, urethanized PBT, polyethylene, polypropylene, polystyrene, polyacrylate, ABS
, AS, polyvinyl chloride, polyacetal, polycarbonate, polysulfone polyether sulfone, polyphenylene oxide.

Plastics such as polyphenylene sulfide, polyester, polyamide, polyurethane, acrylic, olefin, and vinyl chloride.

It is also possible to add thermoplastic lastomers such as styrene and ABS.

Note that the composition can be prepared by various known methods. For example, raw stones are mixed uniformly in advance using a mixer such as a tumbler or Henschel mixer, and then fed into a -screw or twin-screw extruder, where they are melted and kneaded, and then prepared as a pellet-like composition. There are methods etc.

Further, the composition can be molded using a common injection molding machine, and preferably the set temperature of the injection molding machine is within the range of 230 to 290°C for the cylinder and 10 to 80°C for the mold.

Next, this invention will be specifically explained using experimental examples. Here, Experimental Examples 1 to /I based on the present invention and Comparative Examples 1 to 4 that do not satisfy the constituent elements of the present invention will be conducted, and the present invention will be explained in detail by comparing the two. Needless to say, the present invention is not limited to Experimental Examples 1 to 4 shown below.

Note that parts in the examples mean parts by weight.

Experimental Example 1 Intrinsic viscosity [η1 is 0.9] measured in a mixed solvent of tetrachlor J tan/phenol Φ40/60 (wt%)
2 d 1 / g, PBT resin 99.3 parts, montan wax ester calcium salt 0.3 part (0.30% by weight) as a fatty acid metal salt, talc 0.2 part (0.20% by weight) as a silica filler. PS-043 (Organopolysiloxane manufactured by Chisso Corporation, viscosity 1,000ctsk), as organopolysiloxane
After uniformly mixing 0.2 parts (0.20% by weight), 40
The pelletized composition was prepared by melt-kneading using an mφ-screw extruder at a cylinder temperature of 240'C, and the resulting pelletized composition was then molded into a 10-ounce screw type injection molding. Cylinder temperature 260 depending on the machine
℃, mold temperature 45℃ 9 indexing pressure 1,400~5QOK9/
Under molding conditions of af+ and medium injection speed, a connector 1 for an automobile wire harness as shown in the drawing was molded using a so-called 8-cavity mold capable of molding 8 connectors 1 at a time. Then, the shortest molding cycle (seconds) in which connectors 1 with good appearance could be continuously obtained was measured.

Experimental Example 2 Montan wax ester calcium salt of Experimental Example 1 0.
It was molded in exactly the same manner as in Experimental Example 1, except that 0.3 parts of magnesium stearate was used instead of 3 parts, and the same evaluation was performed.

Experimental Example 3 In place of 02 parts of talc in Experimental Example 1, 02 parts of mica (020
The molding was performed in exactly the same manner as in Experimental Example 1, except that % by weight) was used, and the same evaluation was performed.

Experimental Example 4 PS045 (
Except for using Chisso Corporation's organopolis [11 nirene, viscosity 10.0OOc tsk)]
It was molded in exactly the same manner as in Experimental Example 1 and evaluated in the same manner.

Comparative Example 1 Montan wax of Experimental Example 1] It was molded in exactly the same manner as in Experimental Example 1, except that the Nistil calcium salt was not used, and the same evaluation was performed.

Comparative Example 2 Experimental Example 1 except that talc of Experimental Example 1 was not used.
It was molded in exactly the same manner as above and received a similar evaluation of 11.

Comparative Example 3 The molding was performed in exactly the same manner as in Experimental Example 1, except that the l'' S-043 of Experimental Example 1 was not used, and the same evaluation was performed.

Comparative Example 4 Molding was performed in exactly the same manner as in Experimental Example 1, except that Montanwax T Stell calcium salt, talc, and P S ,-,043 of Experimental Example 1 were used, and the same evaluation was performed.

The results are shown in Table 1.

Table 1 As shown in Table 1, in Experimental Examples 1 and 4, the molding 4
While Noikle was short between 25 and 30 seconds, Comparative Examples 1 to 4 were 4. It took a long time, 40-60 seconds, and it was found that Experimental Examples 1 to 4 had excellent productivity.

(Effects of the Invention) As described above, according to the connector of the present invention, the solidification speed of the molten resin in the mold during injection molding is increased, and the mold releasability from the mold after solidification is improved. Therefore, the effect of shortening the molding cycle and improving productivity is increased by 1q, 1

[Brief explanation of drawings]

The drawing is a perspective view showing a 1Q connector for an automatic wire harness according to an experimental example based on the present invention. 1...] Connector Attorney Patent Attorney Shigeaki Yoshida

Claims (1)

[Claims] (1) Silica filler is 0.01 to 3.00% by weight,
Intrinsic viscosity number 0 containing 0.01 to 3.00% by weight of a metal salt of a fatty acid and 0.01 to 3.00% by weight of an organopolysiloxane or an organopolysiloxane compound.
．． A connector comprising a polybutylene terephthalate resin composition of 60 to 1.50 dl/g.