WO2015021757A1

WO2015021757A1 - Antibacterial antistatic plastic casing for financial pos device, and preparation method thereof

Info

Publication number: WO2015021757A1
Application number: PCT/CN2014/071686
Authority: WO
Inventors: 陈演光; 林财; 庄江平
Original assignee: 福建联迪商用设备有限公司
Priority date: 2013-08-10
Filing date: 2014-01-28
Publication date: 2015-02-19
Also published as: CN103435996A; CN103435996B

Abstract

Provided are an antibacterial antistatic plastic casing for a financial POS device, and preparation method thereof. The composition of the plastic casing for a POS device comprises: 95.8%-96.8% synthetic resin, 0.5%-1.0% glass carrier argentum inorganic antibacterial agent, 2%-2.5% macromolecular permanent antistatic agent, 0.2% antioxidant, and 0.5% coupling agent. The preparation method comprises baking the material, distributing the material by proportion, stirring, pelleting and injection molding, to prepare the antibacterial and antistatic plastic casing for a POS machine. The plastic casing for a POS machine not only has good antibacterial and antistatic properties, but also has a simple structure and is easy to manufacture.

Description

Antibacterial antistatic anti-static financial POS machine plastic casing and preparation method thereof

[0001] The present invention relates to an antibacterial antistatic anti-static financial POS machine plastic casing and a preparation method thereof.

Background technique

[0002] At present, the financial POS machine used in medical institutions has a high frequency of contact with the user by the user, and most of the users are patients, which causes the bacteria of the outer casing to breed seriously, becomes a source of bacteria, and ultimately affects the user. Health.

[0003] At the same time, static electricity is far more harmful to a specific population than ordinary people. For example, persistent static electricity can cause the pH of human blood to rise, calcium in the urine to increase, and blood calcium to decrease, which is the most harmful to maternal health. Static electricity can cause progesterone levels in pregnant women to decline, making them susceptible to fatigue, irritability and headaches; older people are more susceptible to static electricity, elderly people with cardiovascular disease will aggravate their condition or induce ventricular premature beats and other arrhythmias .

[0004] In hospitals, monitoring instruments and ECG testing instruments have higher requirements for electrostatic protection, and static electricity can affect equipment testing results.

[0005] In summary, the POS machine used by the medical institution puts special requirements on the antibacterial and antistatic performance of the POS casing.

Summary of the invention

[0006] The object of the present invention is to provide an antibacterial and antistatic anti-static financial POS machine plastic casing and a preparation method thereof. The plastic casing of the POS machine has not only antibacterial and antistatic properties, but also has a simple structure and is easy to manufacture and produce.

[0007] In order to achieve the above object, the technical solution of the present invention is: an antibacterial antistatic anti-static financial POS machine plastic casing, the composition of which comprises: 95.8%~96.8% synthetic resin, 0.5%~1.0% glass carrier silver It is an inorganic antibacterial agent, 2 ° / ^ 2.5% polymer permanent antistatic agent, 0.2% antioxidant, 0.5% coupling agent.

[0008] In an embodiment of the invention, the composition of the plastic housing of the POS machine comprises: 95.9% synthetic resin PC + ABS raw material, 0.9% glass carrier silver inorganic antibacterial agent, 2.5% polymer permanent type Antistatic agent, 0.2% antioxidant, 0.5% coupling agent.

[0009] In an embodiment of the invention, the composition of the plastic housing of the POS machine comprises: 96.5% synthetic resin ABS raw material, 0.8% glass carrier silver inorganic antibacterial agent, 2% polymer permanent antistatic Agent, 0.2% antioxidant, 0.5% coupling agent.

[0010] The present invention also provides a method for preparing the above-mentioned antibacterial antistatic financial POS machine plastic outer casing, comprising the following steps: (1) sufficiently drying the polymer permanent antistatic agent;

1

Replacement page (Article 26) (2) Ingredients: The composition of the plastic shell of the POS machine is prepared according to the following proportions: 95.8%~96.8% synthetic resin, 0.5%~1.0% glass carrier silver inorganic antibacterial agent, 2%~2.5% polymer Permanent antistatic agent, 0.2% antioxidant, 0.5% coupling agent;

(3) Stirring: the above-mentioned proportioned raw materials are uniformly stirred by a high-mixer in a temperature range of 190 ° C to 230 ° C;

(4) granulation: the above-mentioned uniformly stirred raw materials are extruded through a granulator, cooled and dried, and finally granulated to obtain an antibacterial and antistatic plastic master batch;

(5) Injection molding: The prepared plastic masterbatch is set to various molding parameters according to the substrate, and is molded by injection molding using a mold to obtain an antibacterial and antistatic POS plastic case.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

1) It has antibacterial function and kills and inhibits all bacteria and molds. The antibacterial rate is >90%, especially the antibacterial effect against Staphylococcus aureus and Escherichia coli is over 99%, thus effectively inhibiting bacteria. Breeding, avoiding the POS machine becoming a source of bacteria, and does not cause any adverse side effects to the user.

[0012] 2) having an antistatic function, a surface resistance reaches ΙΟ ^ ΙΟ ^11, effectively suppressing accumulation of static electricity.

[0013] 3) The raw material is added and prepared conveniently, suitable for large-scale production in large scale, the plastic casing has sterilization and antistatic property, and is not damaged by light or heat, and does not change color, and has the same antibacterial and antistatic properties from the surface to the inside, and the effective period It is consistent with the product design life.

DRAWINGS

1 is a schematic view showing the composition of a plastic casing of a POS machine according to an embodiment of the present invention.

Specific form

[0015] The invention has a plastic POS plastic shell with antibacterial and antistatic function, and the composition thereof comprises: 95.8%~96.8% synthetic resin (ABS or PC+ABS raw material), 0.5%~1.0% glass carrier silver inorganic Antibacterial agent, 2%~2.5% polymer permanent antistatic agent, 0.2% antioxidant, 0.5% coupling agent. The above-mentioned constituent raw materials are obtained by the following specific steps to obtain a finished plastic shell of a POS machine, and the finished plastic shell of the POS machine utilizes a sustained release of the antibacterial agent in the outer shell to provide an antibacterial effect, and the surface affinity aqueous ASA coating is effective. Suppresses the accumulation of static electricity.

[0016] The antibacterial and antistatic anti-static financial POS machine plastic casing of the present invention is prepared as follows:

(1) The polymer permanent antistatic agent is sufficiently dried and dried in a dryer set at a temperature of 70 to 80 ° C for 4 hours. This step can prevent the antistatic property of the product from deteriorating due to the absorption of moisture by the antistatic agent during the granulation process.

[0017] (2) Ingredients: The composition of the plastic shell of the POS machine is prepared according to the following proportions: 95.8%~96.8% synthetic resin (ABS or PC+ABS raw material), 0.5%~1.0% glass carrier silver inorganic Antibacterial agent, 2%~2.5% polymer permanent antistatic agent, 0.2% antioxidant, 0.5% coupling agent. [0018] (3) Stirring: The above-mentioned proportioned constituent raw materials are uniformly stirred by a high-mixer in a temperature range of 190 ° C to 230 ° C.

[0019] (4) Granulation: The above-mentioned uniformly stirred raw materials are extruded through a twin-screw granulator, cooled and dried by a cooling water tank and a blow dryer, and finally granulated to obtain an antibacterial antistatic plastic master batch.

[0020] (5) Injection molding: The prepared plastic masterbatch is subjected to various molding parameters such as mold temperature, pressure and time according to the substrate, and is injection molded by an injection molding machine to obtain an antibacterial and antistatic POS machine. plastic shell.

[0021] The antibacterial properties of the present invention are achieved by a glass carrier silver-based inorganic antimicrobial agent:

The antibacterial ability of silver ions is well known. The chemical structure of silver determines the high catalytic ability of silver, and the high oxidation state of silver is extremely high enough to generate atomic oxygen in its surrounding space. Atomic oxygen has strong oxidizing properties and can be sterilized. Ag+ can strongly attract the sulfhydryl group (-SH) on the protease in the bacterial body, and bind it quickly to inactivate the protease, leading to bacterial death. When the bacteria are killed by Ag+, Ag+ is released from the corpses of the bacteria and then contacted with other colonies, and the above process is repeated, which is also the reason for the persistence of silver sterilization.

[0022] The glass is a material having excellent chemical stability, the glass can serve as a carrier to support metal ions, and the silver having an antibacterial function is attached to the glass structure in the form of silver ions, and the silver ions are dissolved as the glass dissolves, thereby The material is rendered antimicrobial.

[0023] The following are the test results of the antibacterial properties obtained by adding different proportions of antibacterial agents to the plastic casing of the POS machine:

The antistatic property of the present invention is achieved by an antistatic agent: The polymer permanent antistatic agent is a hydrophilic polymer. When it is blended with the polymer matrix, on the one hand, due to its strong molecular chain movement ability, the protons are easy to move between molecules, and the generated electrostatic charge is transmitted and released by ion conduction; on the other hand, the antistatic ability is through Special dispersion form is reflected. The polymer permanent antistatic agent is mainly distributed in the layered or ribbed layer on the surface of the product to form a conductive surface layer, and is distributed almost spherically in the central portion to form a so-called "core shell structure". Leaking static charge. Because the polymer permanent antistatic agent achieves an antistatic effect by reducing the volume resistivity of the material, it does not completely depend on the surface water absorption, so it is less affected by the humidity of the environment.

[0024] The following are the test results of the antistatic properties obtained by adding different proportions of antistatic agents to the plastic case of the POS machine:

The invention is further illustrated by the following specific examples.

[0025] Example 1 :

(1) Baking material: The antistatic agent is fully dried before being added, and dried in a dryer with a set temperature of 70 to 80 ° C for 4 hours.

(2) Ingredients: Prepared in the following proportions: 95.9% synthetic resin PC+ABS raw material, 0.9% glass carrier silver inorganic antibacterial agent, 2.5% polymeric permanent antistatic agent, 0.2% antioxidant , 0.5% coupling agent.

[0027] (3) Stirring: The ingredients mixed in proportion are uniformly stirred by a high mixer in a temperature range of 190 ° C to 230 ° C.

[0028] (4) Granulation: Extrusion by a twin-screw granulator, passing through a cooling water tank and a dryer, and finally pelletizing, a plastic masterbatch having antibacterial and antistatic properties can be obtained.

[0029] (5) Injection molding: The prepared plastic masterbatch is subjected to various molding parameters such as mold temperature, pressure and time according to the substrate, and is injection molded by an injection molding machine, thereby obtaining antibacterial and antistatic properties. POS machine plastic case.

[0030] Example 2:

[0031] (2) Ingredients: Prepared in the following proportions: 96.5% synthetic resin ABS raw material, 0.8% glass carrier silver inorganic antibacterial agent, 2% polymeric permanent antistatic agent, 0.2% antioxidant, 0.5 % coupling agent.

[0032] (3) Stirring: The ingredients mixed in proportion are uniformly stirred by a high mixer in a temperature range of 190 ° C to 230 ° C.

[0033] (4) Granulation: Extrusion by a twin-screw granulator, passing through a cooling water tank and a dryer, and finally pelletizing, a plastic masterbatch having antibacterial and antistatic properties can be obtained.

[0034] (5) injection molding: the prepared plastic masterbatch, according to the substrate set mold temperature, pressure, time and other various molding parameters The number of plastic molds of POS machines with antibacterial and antistatic properties is obtained by injection molding using a mold.

[0035] The main advantages of the invention:

1. The known inorganic antibacterial agents for the antibacterial shell plastics of electronic products are all zeolite carriers. Although the antibacterial property of the glass carrier is less than that of the zeolite carrier, the stability and long-term stability of the glass carrier are the best, and the conditions for controlling the addition ratio are controlled. The same strong antibacterial effect can be achieved under the same conditions. Therefore, the glass carrier silver-based inorganic antibacterial agent is preferred in the present invention.

[0036] wherein the optimum ratio of the antibacterial agent is 0.9%, which is more precise than the range of 0.5 to 1.5% used by the outside world, and the cost of controlling the antibacterial agent raw material is relatively expensive.

[0037] 2. The polymer permanent antistatic agent is a hydrophilic polymer which can impart permanent antistatic properties to the hydrophobic polymer, but does not substantially affect other properties, which is not possessed by other modifiers. advantage. It achieves an antistatic effect by reducing the volume resistivity of the material, and does not completely depend on the surface water absorption, so it is less affected by the humidity of the environment. Other types of antistatic agents need to have higher water absorption of the antistatic agent molecules when the external environment humidity is high, and the antistatic performance is more remarkable. Therefore, the present invention is preferably a polymer permanent antistatic agent which is excellent in stability and long-term effectiveness.

[0038] 3, at the same time adding antibacterial agent and antistatic agent, the physical properties of the original substrate (ABS or PC + ABS) did not have much impact, the finished product after vibration, drop, high and low temperature cycle, anti-aging test Maintain a normal good condition.

The above is a preferred embodiment of the present invention, and any changes made by the technical solutions of the present invention do not depart from the scope of the technical solutions of the present invention.

Claims

Claim

1. An antibacterial antistatic anti-static financial POS machine plastic casing, characterized in that the plastic component of the POS machine has a component package of ₅ 95.8»/^96.8%» 戚 resin, 0.5 ^β / 1.0%» glass carrier The instrument is flawless, 2 2.5%»molecular permanent antistatic, 0.2% «antioxidant cut, 0.5% coupling agent.

2. An antibacterial electrostatic financial POS Λ plastic shell according to claim 1, characterized in that: * POS machine plastic shell of the turtle into a package of 95.9% of the tortoise grease PC + ABS raw material, 0, 93⁄4 fishing Glass-based silver-based inorganic antibacterial agent, 2.5% polymer permanent antistatic agent, 0.2% antioxidant, 0.5% coupling agent.

3. According to the school's profit requirement 1 a kind of picking bacteria to pick up static electricity" financial POS machine plastic shell, which is characterized by the composition of the plastic shell of the POS machine including: 96.5% synthetic tree ABS material, 0.8 %»Glass-loaded 系 bond is an inorganic bacteriostatic agent, 2% polymer permanent bismuth electrostatic agent, 0.2% anti-oxygen ft cutting, 0.5%»Coupling agent _β

The method for preparing a plastic outer shell of an antibacterial antistatic anti-static gold touch POS machine according to claim 1, wherein the step of substituting -

(1) Full Hongji Polymer Permanent Antistatic Agent;

(2) Ingredients: The composition of the plastic shell of the POS machine is prepared according to the following ratio: 95,8%~96.8% Weng synthetic resin

0.53⁄4r. 0% of glass carrier silver-based inorganic bacteria cutting, 2%~2.5% Weng polymer permanent type 擒 electrostatic cutting, 0.2% «antioxidant, 0.5% coupling cutting;

(3) Stirring: The above-mentioned proportioned raw materials are uniformly mixed in a temperature range of 10'C~230*C through a high foaming machine:

(4) granulation: the above-mentioned raw materials which are stirred and twisted are extruded through a granulator, cooled and dried, and finally granulated to obtain an antibacterial antistatic plastic master batch;

(5) Injection molding: The prepared plastic masterbatch is set according to various molding parameters of the substrate, and is injection molded by the injection molding machine. «Antibacterial tt electrostatic tt POS machine plastic casing _β

Replacement tribute (Article 20)