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Silicone rubber products hygiene unqualified reason main characteristics

Release time:

2021-01-12 16:27

Source:

Dongguan Mingzhen

At present, it is found that the sanitary index of exported silicone rubber products is not qualified mainly for the following three reasons:.

First, the quality control of raw materials is not strict. The O-ring seal is insulated with silicone pad and has excellent high temperature resistance. Silicone (food grade silicone) silicone products can withstand high temperatures of 200 ℃ and can be used for a long time. The raw materials produced by this product meet SGS standards and pass FDA food grade silicone testing standards. It is tasteless and non-toxic. The manufacturer produces according to the model. The color and shape can be customized.

Some enterprises of silicone key have not paid enough attention to the control of raw materials used for kitchen tableware. Without testing (checking and testing) of raw materials, silicone materials with low quality grade are used for the production of food contact products, or unqualified color glue is used for coloring in the production of sealing rings, resulting in the hygiene index of molded products exceeding the standard.

Second, the production process is arbitrary. O-ring silica gel is becoming more and more popular because of its environmental protection performance. To understand the knowledge of liquid silica gel in silica gel products, one must start with silica gel raw materials. Silicone sealing rings are mainly used for waterproof sealing and preservation of daily necessities such as fresh-keeping boxes, electric rice cookers, drinking fountains, lunch boxes, heat preservation boxes, water cups, ovens, magnetization cups, coffee pots, etc. Due to the particularity of raw materials, silica gel products factories, silicone rubber miscellaneous parts have high requirements for production process control, especially enough baking time is required to remove volatile substances after the products are formed. In order to pursue production efficiency, some companies do not have silicone key manufacturers to pack the finished products into boxes when they reach the specified baking time, resulting in the total migration amount exceeding the standard. Yinzhou Bureau has found that 3 batches of products are unqualified due to this reason since this year.

Silicone products are made of methyl vinyl silicone rubber as the base glue, and various fillers (reinforcing agents, heat-resistant agents, modifiers, etc.) are added to the seals through mixing, bookflow, filtration, sulfur addition, molding, extrusion, bonding and other production processes. Vulcanized rubber products have the following characteristics:.

(1) High and low temperature resistance: rubber products can be used for a long time at 200 ℃, and still have elasticity at -60 ℃.

(2) Electrical insulation properties: The dielectric properties of silicone rubber are excellent, especially the dielectric properties at high temperatures are much higher than those of ordinary organic rubber, and the dielectric strength is almost unaffected by temperature in the range of 20-200 ℃.

(3) Excellent weather resistance, ozone resistance and ultraviolet radiation resistance, long-term outdoor use does not crack, it is generally believed that silicone rubber can be used outdoors for more than 20 years.

 

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More information

What is the difference between silicone plug and rubber plug

Silicone plug and rubber plug which one effect is good? Then today we will popularize their difference to where the end point is. First of all, rubber plug products, as a common type of industrial products and accessories, or have strong advantages, such as dust and water resistance, wear resistance, tear resistance, aging resistance, oil seal resistance and ozone radiation resistance, etc., while rubber materials are divided into various types, and the side materials over there can be made of dozens of compound materials, so different attribute functions can be deployed for different needs, as for some industries such as mechanical tight closure, electronic tight closure, vehicle construction and even aerospace and military industry, rubber blocking is the most suitable. Silicone rubber plug and rubber plug have one thing in common. They can be molded in the molding vulcanizer of silicone product manufacturers. The difference is that they are more environmentally friendly, have good high and low temperature resistance, feel better when touching by color hands, and can be in contact with human body skin for a long time. Therefore, silicone plugs for earphones and medical grade silicone plugs are widely used even in food silicone appliances, mainly or because of the material in particular the nature of the achievements of its scope of application. Silicone plug is different. Its material is mainly based on environmental protection advantages, material texture and comfortable application. Therefore, it is used in some electronic products, survival products and small-scale waterproof and dustproof household appliances. Its raw materials are mixed by precipitation method silica gel, high-fine molecular silicone gum and white carbon black. The molecular chain of the product is called heart, soft and comfortable to use! Compared with the materials of silica gel and rubber, they can be compared as follows: new technologies are used in traditional industries. Rubber materials have been heard for a long time in early years, so the comparison of rubber materials accounts for the majority. Up to now, more and more silicone rubber products have been reused because they can replace larger usage compared with rubber, namely environmental protection performance and various technologies, such as shape, pattern and color, etc. www.mingzhen2006.com

What are the fields of application of silicone keys for equipment

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The convenience of the use of industrial silicone buttons

In order to solve the above problems and technical defects, after continuous updating and design, a multi-station silicone button trimming machine was invented, and a utility model patent was applied. The utility model relates to a multi-position silicone button trimming machine, which comprises a base, a gantry frame and four cutting cylinders, and the four cutting cylinders are arranged vertically on the top of the gantry frame in a horizontal straight line. The beneficial effect achieved by the utility model is that the structure design is reasonable. By adopting the combination design of four reinforcement tables and four cutting blades on the gantry, the device can simultaneously trim four silicone button products. Thereby greatly improving the efficiency of trimming processing of silicone products. With the continuous expansion of the silicone button market, how to improve the processing efficiency of the silicone button has made producers pay more and more attention. The trimming of the silicone button is an important step in the production process of the silicone button, and the trimming of the traditional silicone button The processing efficiency cannot be improved, which affects the overall production efficiency of the silicone button. Various types of silica gel have different microporous structures due to their different manufacturing methods. The chemical composition and physical structure of silica gel determine that it has many characteristics that are difficult to replace other similar materials: high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength. Silica gel according to its pore size is divided into: macroporous silica gel, coarse pore silica gel, type B silica gel, fine pore silica gel. www.mingzhen2006.com

What are the molding techniques of rubber products?

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How to print the pattern on the transparent key

Some laser marking machines have played opaque keys. While using laser typing to knock out the paint, they will also burn the plastic parts that can transmit light, but cannot transmit light! Changzhou laser marking machine has a special device, which can adjust the machine to the function of laser processing light-transmitting key. The laser can clean the paint sprayed on the surface very clean without burning light-transmitting plastic, thus realizing light-transmitting key laser processing! YAG laser marking machine, the general laser marking machine can not do through the key! Light transmission keys, also called light transmission buttons, are widely used in electronic products. In dark environments, they can accurately and accurately find each button. The light transmission keys include a light transmission key body, an electronic switch located below the key body, and a luminous body. The luminous body is arranged on the lower side of the key body. A light guide body is arranged below the key body, and the light guide body has a body, the upper side of the body extends an extension to the position where the electronic switch is located, the outer surface of the extension is a first reflective slope, the lower surface of the body is a second reflective slope and doubles as a light touch surface that can be contacted with the electronic switch, and a light input part connected with the extension part and arranged corresponding to the light emitting body, the light emitting body emits light, the light is emitted to the first reflective slope through the introduction portion, and is reflected by the first reflective slope into the body, and the light entering the body is reflected by the second reflective slope out of the key body. The structure makes the light emitted from the light emitting surface of the key body more uniform, the key is more beautiful, and the user can accurately find the corresponding function key. The pattern and text on the keys are processed by laser typing! In our life, there are many keys and buttons that use laser typing and can transmit light, such as mobile phone keys, car audio keys, computer keys, and various electronic and electrical keys! www.mingzhen2006.com