CN216420416U

CN216420416U - Nitrile rubber glove acid cleaning system capable of effectively reducing alkali content

Info

Publication number: CN216420416U
Application number: CN202122104665.5U
Authority: CN
Inventors: 杨帆; 王庆俊; 孙俊; 石岩; 王乃洲
Original assignee: Siyang Jiesheng Medical Technology Co ltd
Current assignee: Siyang Jiesheng Medical Technology Co ltd
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2022-05-03
Anticipated expiration: 2031-09-02

Abstract

The utility model discloses a nitrile rubber glove acid washing system capable of effectively reducing alkali content, which strengthens the effect of treating residual alkali components in gloves, so that the alkali content in the nitrile rubber gloves can be reduced to the standard of the content of educts in food contact rubber products, the product quality is improved, and the later-stage use safety is improved. The nitrile rubber glove acid cleaning system capable of effectively reducing the alkali content comprises a first cooling water tank, a second cooling water tank, a third cooling water tank, a fourth cooling water tank, a first chlorine washing tank, a second chlorine washing tank, a third chlorine washing tank, a fourth chlorine washing tank and a chlorine conveying device, wherein the first cooling water tank, the second cooling water tank, the third cooling water tank, the fourth chlorine washing tank and the chlorine conveying device are sequentially arranged, and a set of mechanical arm capable of enabling the part above the wrist of the nitrile rubber glove to be in a half-demoulding state is arranged between the second chlorine washing tank and the third chlorine washing tank.

Description

Nitrile rubber glove acid cleaning system capable of effectively reducing alkali content

Technical Field

The utility model relates to a nitrile rubber glove acid cleaning system, in particular to a nitrile rubber glove acid cleaning system capable of effectively reducing alkali content.

Background

With the development of modern science and technology, the living standard of people is improved, and especially in the current epidemic period of the new crown epidemic situation, the safety requirements of people on ingested food and articles contacted with the ingested food are greatly improved. Gloves are common tools capable of isolating external bacteria from contacting human bodies, and the gloves are often required to be contacted with food ingested by people and also to be contacted with human bodies in daily life. In the current market, disposable gloves are in a wide variety, wherein disposable nitrile rubber gloves have been developed in recent years, and the air permeability and comfort of the disposable nitrile rubber gloves are similar to those of natural latex gloves, and skin allergy caused by residual protein in the final product of the natural latex gloves is avoided. In addition, compared with disposable polyethylene gloves, the nitrile rubber gloves have the advantages of good elasticity, comfort in hand fitting, suitability for long-time wearing and operation, and capability of selecting disposable nitrile rubber gloves to process food by many people. However, for nitrile rubber gloves as food contact grade rubber material, certain standards are still required in terms of specific quality determination.

The raw material for producing disposable nitrile rubber gloves is nitrile latex, and because nitrile latex has stability under alkaline conditions, alkaline substances (such as KOH and the like) are often added in the process of producing nitrile rubber gloves to keep the stability of nitrile latex in the early processing process. When the finished nitrile rubber gloves after vulcanization molding are applied to food contact grade rubber products, relevant precipitate testing standards need to be passed, for example, the residual alkali content in the finished nitrile rubber gloves is measured by soaking in 4% acetic acid at 40 ℃ for 0.5h, with a maximum extraction of 10mg/dm². At present, food contact grade rubber products on the market usually hardly meet the standard, so the finished nitrile rubber gloves are often pickled in the later period of the production process, and the treatment is carried out by utilizing the principle of acid-base neutralization so as to remove residual alkaline substances in the products.

The post-treatment of the existing production process mainly comprises the following two modes: the first is the traditional way, the nitrile rubber gloves which finish the vulcanization process are directly stripped from the ceramic hand mold after being cooled by a water tank. The residual alkali treatment process is to collect the prepared gloves, then wash the gloves with water and then dry the gloves into finished products. The treatment mode has the advantages that the front side and the back side of the nitrile rubber gloves are contacted with water, the contact area is large, so that alkali is easily dissolved in the water, the gloves are cleaned cleanly, and the alkali content in finished products is low. However, this method is intermittent and has a low cleaning efficiency. Secondly, the second type is a currently common continuous treatment system, and the system is to cool vulcanized gloves in four cooling water tanks, then to flush the vulcanized gloves in four chlorine washing tanks after reaching a specified cooling temperature, and then to carry out seven post-leaching water washing processes; the gloves after being cooled, neutralized by chlorine, acid and alkali, washed to be neutral enter an emulsion isolation treatment pool containing 1% of polydimethylsiloxane, are treated by an isolating agent, enter a drying tunnel to dry surface moisture, and are finally demoulded to prepare finished nitrile rubber gloves. The processing mode has the advantages of continuous and automatic process, high production efficiency, capability of saving production cost to a great extent and improving productivity. However, only the outer surface of the glove is cleaned in the process of the treatment, and the inner part of the glove is not in contact with the treatment liquid in the chlorine washing tank, so that the cleaning effect is poor, and the alkali content in the finished glove is too high to reach the precipitate test standard of the food contact grade rubber product. Therefore, there is a need to develop a nitrile rubber glove acid cleaning system which can effectively reduce the alkali content, so that the alkali content in the nitrile rubber gloves can be reduced to the standard of the content of educt in food contact rubber products.

Disclosure of Invention

The utility model aims to solve the defects and problems in the prior art, namely, the problems that in the process of washing the residual alkali components in the gloves with acid liquor, the inner surfaces of the gloves cannot contact with treatment liquor, so that the alkali content in the gloves is too high, the content standard of precipitates in food contact grade rubber products cannot be met and the like are solved.

The utility model is realized by the following technical scheme:

the nitrile rubber glove acid cleaning system capable of effectively reducing the alkali content comprises a first cooling water tank, a second cooling water tank, a third cooling water tank, a fourth cooling water tank, a first chlorine washing tank, a second chlorine washing tank, a third chlorine washing tank, a fourth chlorine washing tank and a chlorine conveying device, wherein the first cooling water tank, the second cooling water tank, the third cooling water tank, the fourth chlorine washing tank and the chlorine conveying device are sequentially arranged; therefore, the ceramic hand mold with the nitrile rubber gloves is in a half-demolding state in the rear half part chlorine washing process, the whole post leaching process and the treatment process containing the separant, and the chlorine washing liquid, the post leaching treatment liquid and the separant can enter the gloves, so that the chlorine washing effect is improved, and the gloves are prevented from being adhered.

The further technical scheme of the nitrile rubber glove acid cleaning system capable of effectively reducing the alkali content is that the manipulator is composed of two symmetrical and synchronous arms which enable the part above the wrist of the nitrile rubber glove to be in a semi-demolding state.

The nitrile rubber glove acid washing system capable of effectively reducing the alkali content has the further technical scheme that the temperatures of the first cooling water tank, the second cooling water tank, the third cooling water tank and the fourth cooling water tank are respectively and strictly controlled at 80 ℃, 70 ℃, 55 ℃ and 40 ℃, so that the good cooling effect is achieved, and the subsequent chlorine washing effect is improved.

According to the nitrile rubber glove acid washing system capable of effectively reducing the alkali content, the further technical scheme can be that the chlorine content in the first chlorine washing tank, the second chlorine washing tank, the third chlorine washing tank and the fourth chlorine washing tank is strictly controlled to be 900ppm, 700ppm, 600ppm and 400ppm respectively; so as to achieve the best chlorine washing effect, greatly reduce the alkali content in the finished glove product and achieve the standard requirement of the alkali content of food contact rubber products.

Compared with the prior art, the utility model has the following beneficial effects:

the manipulator demoulding device is additionally arranged before the third chlorine washing tank, so that the vulcanized and cooled gloves are in a semi-demoulding state after entering the third chlorine washing tank, and the alkali treatment liquid can enter the gloves to contact with the inner surfaces of the gloves, so that the alkali treatment efficiency is improved, the alkali content in finished gloves is reduced, and the safety of the gloves for food contact grade rubber products is improved.

Secondly, the nitrile rubber glove acid cleaning system capable of effectively reducing the alkali content is additionally provided with the manipulator demoulding device before the third chlorine washing tank, so that the gloves are in a semi-demoulding state in the treatment process of the isolating agent, the contact area between the gloves and the isolating agent is increased, the isolation treatment efficiency can be improved, and the anti-sticking effect of the gloves is improved.

The nitrile rubber glove acid washing system capable of effectively reducing the alkali content can keep the continuous automation of the original production process flow, improve the quality, keep high production efficiency and improve the production benefits of enterprises.

Drawings

FIG. 1 is a schematic structural diagram of a conventional nitrile rubber glove acid cleaning system;

in FIG. 1, the following are labeled: 1-1 is a first cooling water tank, 1-2 is a second cooling water tank, 1-3 is a third cooling water tank, 1-4 is a fourth cooling water tank, 1-5 is a first chlorine washing tank, 1-6 is a second chlorine washing tank, 1-7 is a third chlorine washing tank, 1-8 is a fourth chlorine washing tank, 1-9 is a chlorine gauge, 1-10 is a chlorine tank, and 1-11 is a chlorine conveying pipeline.

FIG. 2 is a schematic structural diagram of the nitrile rubber glove acid cleaning system for effectively reducing alkali content.

In FIG. 2, the following references: 2-1 is a first cooling water tank, 2-2 is a second cooling water tank, 2-3 is a third cooling water tank, 2-4 is a fourth cooling water tank, 2-5 is a first chlorine washing tank, 2-6 is a second chlorine washing tank, 2-7 is a third chlorine washing tank, 2-8 is a fourth chlorine washing tank, 2-9 is a chlorine gas meter, 2-10 is a chlorine gas tank, 2-11 is a first demoulding mechanical arm, 2-12 is a motor, 2-13 is a semi-demoulding ceramic hand mould, 2-14 is a second demoulding mechanical arm, and 2-15 is a chlorine gas conveying pipeline.

Detailed Description

The utility model is further described below with reference to fig. 2.

As shown in fig. 2, the nitrile rubber glove acid cleaning system capable of effectively reducing alkali content of the present invention comprises a first cooling water tank, a second cooling water tank, a third cooling water tank, a fourth cooling water tank, a first chlorine washing tank, a second chlorine washing tank, a third chlorine washing tank, a fourth chlorine washing tank and a chlorine gas conveying device, which are sequentially arranged, wherein a set of manipulator is arranged between the second chlorine washing tank and the third chlorine washing tank to make the part above the wrist of the nitrile rubber glove in a semi-demolding state; therefore, the ceramic hand mold with the nitrile rubber gloves is in a half-demolding state in the rear half part chlorine washing process, the whole post leaching process and the treatment process containing the separant, and the chlorine washing liquid, the post leaching treatment liquid and the separant can enter the gloves, so that the chlorine washing effect is improved, and the gloves are prevented from being adhered. The manipulator consists of two symmetrical arms which synchronously make the part above the wrist of the nitrile rubber glove in a semi-demoulding state, and also comprises a motor for providing power. The temperatures of the first cooling water tank, the second cooling water tank, the third cooling water tank and the fourth cooling water tank are respectively strictly controlled at 80 ℃, 70 ℃, 55 ℃ and 40 ℃, so that the subsequent chlorine washing effect is improved while a good cooling effect is achieved. The chlorine content in the first chlorine washing tank, the second chlorine washing tank, the third chlorine washing tank and the fourth chlorine washing tank is strictly controlled to be 900ppm, 700ppm, 600ppm and 400ppm respectively; so as to achieve the best chlorine washing effect, greatly reduce the alkali content in the finished glove product and achieve the standard requirement of the alkali content of food contact rubber products. The chlorine conveying device consists of a chlorine gauge, a chlorine tank, a chlorine conveying pipeline and a valve and can convey chlorine to the chlorine washing tank quantitatively.

Claims

1. The utility model provides an effectively reduce nitrile rubber gloves pickling system of alkali content, is including the first cooling trough, second cooling trough, third cooling trough, fourth cooling trough, first chlorine washtrough, second chlorine washtrough, third chlorine washtrough, fourth chlorine washtrough and the chlorine conveyor that sets gradually, its characterized in that, second chlorine washtrough and third chlorine washtrough between set up one set of manipulator that makes above the nitrile rubber gloves wrist part be half drawing of patterns state.

2. The system for pickling nitrile rubber gloves with an effective amount of alkali according to claim 1, wherein said robot comprises two arms that are symmetrical and synchronized to allow the upper portion of the nitrile rubber glove wrist to assume a semi-demolded state.

3. The system for pickling nitrile rubber gloves with an effective alkali content according to claim 1, wherein the temperatures of the first cooling water tank, the second cooling water tank, the third cooling water tank and the fourth cooling water tank are strictly controlled at 80 ℃, 70 ℃, 55 ℃ and 40 ℃ respectively.

4. The system for pickling nitrile rubber gloves with an effective alkali content according to claim 1, wherein the chlorine content in the first chlorine scrubber, the second chlorine scrubber, the third chlorine scrubber and the fourth chlorine scrubber is strictly controlled to be 900ppm, 700ppm, 600ppm and 400ppm respectively.