JPH0199977A - Packaging of electric contact - Google Patents

Abstract

PURPOSE:To prevent the release agent from transferring to the surface of an electric contact, and an electric contact from undergoing sulfide discoloration, by putting an Ag electric contact into a polyethylene bag before heat seal of the opening, and by putting the polyethylene bag as well as the drying agent into nylon polyethylene bag before heat seal of the opening to make double packaging. CONSTITUTION:An Ag electric contact is put into a polyethylene bag before heat seal of the opening, and this polyethylene bag as well as the drying agent are put into a nylon polyethylene bag before heat seal of the opening, thus making double packaging. Since an Ag electric contact is put into a polyethylene bag using no release agent, there is no deposit of release agent to the electric contact. Since this polyethylene bag as well as the drying agent are put into a nylon polyethylene bag of no ventilation, sulfidation due to hydrogen sulfide gas can be prevented. Since the inside polyethylene bag has ventilation, the drying agent included in the outside nylon polyethylene bag effectively acts on the electric contact in the inside bag, and there is no possibility of the deposit of foreign matters due to the direct contact of the drying agent with the electric contact.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method of packaging electrical contacts.

(Prior art and its problems) Conventionally, when transporting electrical contacts, the product was generally placed in a polyethylene bag or nylon plastic bag, and the opening was heat-sealed.

By the way, nylon plastic bags have no air permeability, so it is advantageous to use a desiccant such as silica gel, but in order to improve the separation from the mold during bag manufacturing, it is recommended to use a mold release agent such as corn powder. Because of this, mold release agent is attached to the bag surface. Therefore, when electrical contacts are placed in this bag, the mold release agent transfers to the surface of the electrical contacts, causing various contact failures.

On the other hand, although polyethylene bags do not have release agents attached to them, they are breathable, and when packaging Ag-based electrical contacts that sulfurize with hydrogen sulfide gas, etc., the sulfide gas permeates through them, causing the electrical contacts to sulfurize and contact Failures sometimes occurred.

Therefore, in order to package Ag-based electrical contacts, there has been a demand for a bag that is not breathable and does not have a release agent attached to it, but in reality, there is no bag that has these characteristics.

(Object of the Invention) The present invention was made in view of the above circumstances, and provides an electrical contact in which the release agent does not transfer to the surface of the electrical contact and the electrical contact does not become discolored due to sulfurization when packaging Ag-based electrical contacts. The purpose is to provide a packaging method for

(Means for Solving the Problems) In order to solve the above-mentioned problems, the packing method for electrical contacts of the present invention includes placing Ag-based electrical contacts in a polyethylene bag, heat-sealing the opening, and using a desiccant agent to seal the opening of the Ag-based electrical contacts. The product is characterized by being double-packed by placing it in a nylon plastic bag and heat-sealing the opening.

(Function) In the packing method for electrical contacts of the present invention, the Ag-based electrical contacts are placed in a polyethylene bag that does not use a mold release agent, so there is no mold release agent attached to the electrical contacts, and the polyethylene bag is packed together with a desiccant. Since it is placed in a non-breathable nylon plastic bag, it can prevent sulfurization caused by hydrogen sulfide gas.

Since the inner polyethylene bag is breathable, the desiccant enclosed in the outer nylon polyethylene bag acts effectively on the electrical contacts inside the inner bag, and the desiccant can also prevent foreign matter from coming into direct contact with the electrical contacts. There is no need to worry about adhesion.

(Example) A polyethylene bag with a thickness of 0.1 m, a length of 160 mm, and a width of 110 mm is placed in a polyethylene bag made of Ag with a diameter of 3 m and a thickness of 0.3 [111 mm].
Insert 1000 rivet-type electrical contacts made of 11 contact materials clad in a composite material made of Cu, each having a head diameter of 3I, a head thickness of 1.3 mm, a leg diameter of 1.5 mm, and a leg length of 2.0 mm.
The opening was heat sealed. Then, this polyethylene bag was placed in a nylon polybag having a thickness of 0.08 mm, a length of 200 mm, and a width of 140 mm, together with silica gel (desiccant), the opening was heat-sealed, and the bag was double-packed.

On the other hand, as a conventional example, 10 rivet-type electrical contacts similar to those of the embodiment were attached to a polyethylene bag and a nylon polybag of the above dimensions.
00 pieces were placed and the opening was heat sealed.

After each packaging of these examples and conventional examples was left in a 10 ppm hydrogen sulfide atmosphere for one month, the contact surfaces were inspected.
The results shown in the table below were obtained.

As is clear from the table above, in the packaging method of Conventional Example 1, 20 out of 1,000 electrical contacts were sulfurized and discolored, and in the packaging method of Conventional Example 2, the release agent caused only 1 electrical contact to adhere.
While there were as many as 4 out of 000 items, there were no such cases with the packaging method of the example.

Incidentally, although the above embodiment describes the packaging of rivet-type electrical contacts, the present invention is not limited to this.

(Effects of the Invention) As can be seen from the above explanation, according to the packing method for electrical contacts of the present invention, Ag-based electrical contacts will not be sulfurized, discolored, or have a release agent attached to them, so they will not be damaged during use. This has the effect that contact failure does not occur.

Applicant: Tanaka Kikinzoku Kogyo Co., Ltd.

Claims (1)

[Claims] This method of packaging electrical contacts is characterized by placing an Ag-based electrical contact in a polyethylene bag, heat-sealing the opening, placing the polyethylene bag together with a desiccant in a nylon plastic bag, heat-sealing the opening, and double-packing.