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Dongguan Mingzhen Rubber & Plastic Products Co., Ltd.

18 yearsFocus on R & D and production of silicone rubber products

Become a respected supplier of silicone rubber products

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+86-136 6988 8704

Dongguan Mingzhen Rubber & Plastic Products Co., Ltd.
18 years focus on silicone rubber products research and development and production
Professional customization

Dongguan Minz Rubber & Plastics Co., Ltd.

Add.: No.4, New Industrial Road, Shipai Tangwei, shipai town, Dongguan City
Tel: +86-0769-8665 2688
Fax: +86-796-8180 6477
Contact: Miss Li +86-136 6988 8704
Mailbox:lixiaoxia@dgminz.com.cn

What are the bonding methods of silicone rubber products

What are the bonding methods of silicone rubber products

2020-11-12 10:40:30

Silicone rubber products are made of methyl vinyl silicone rubber as the base glue and various fillers (reinforcing agent, heat resistant agent, modifier, etc.) are added through mixing, bookflow, filtration, sulfur addition, molding, extrusion, bonding and other production processes. Silicone rubber products have excellent comprehensive properties and good technical and economic effects, and have been used in aviation, aerospace, atomic energy, electrical appliances, electronics, instruments, automobiles, machinery, metallurgy, chemical industry, medical and health, daily life, various silicone keys have been widely used in various fields, so what are the common problems of silicone rubber products. Silicone rubber mold why there will be less turnover. In the process of making the mold, too much silicone oil is added, and the silicone oil sealing ring destroys the molecular weight of the silica gel, so the mold will have the phenomenon of less mold turning times and not durable. If the mold is opened with silica gel with high hardness when making small products with complex patterns, the liquid silica gel with less mold turning times will appear, because the silica gel will be brittle and easy to break when it is too hard. On the contrary, if you do build products and use small hardness silicone to make molds, the results will also be unsatisfactory. Why silicone rubber mold will appear silicone products factory burning phenomenon. Because unsaturated resin and resin products are added with peroxide curing agent, a large amount of heat will be generated in case of resin reaction. Generally, the curing time of resin is 3 minutes, so after 3 minutes, the silicone key manufacturer should release the mold as soon as possible to prevent the silicone mold from burning. What is the technique of bonding silicone rubber products. 1, seal silicone rubber products use white oil or toluene to clean up the area where silicone rubber miscellaneous parts need to be pasted with double-sided tape<油污与水渍>, add diluent in proportion and stir well for use. 2. Note: Silicone and rubber have different materials. Silicone treatment agent is used for silicone miscellaneous parts and rubber treatment agent is used for rubber keys. The two rubber products cannot be mixed and used by mistake, otherwise it will lead to degumming after sticking double-sided adhesive. 3. Bonding skills of silicone rubber products: The treating agent is evenly applied to the areas where adhesive needs to be backed on the silicone rubber miscellaneous parts. After evenly applied, the silicone rubber miscellaneous parts are placed on the rubber keys in a cool and ventilated place for the treating agent to dry naturally. 4. After the processor on the silicone rubber miscellaneous parts is naturally air-dried, stick the double-sided adhesive on the area where the double-sided adhesive needs to be pasted on the silicone rubber miscellaneous parts. The silicone miscellaneous parts have been tightly bonded to the double-sided adhesive. </油污与水渍>

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How to reduce the viscosity of silica gel products appear impurities

How to reduce the viscosity of silica gel products appear impurities

2020-11-09 16:56:39

Silicone rubber tube is added to a two-roll rubber mill or a closed kneader, and gradually added white carbon black and other additives to make it evenly and repeatedly. According to the technical standard requirements of industry products, the products made by extrusion, the products made by extrusion of silicone products will stick together after being put together for a long time. The extruded silicone rubber tube is vulcanized with peroxide, and the tube will still stick together after being stored for a long time after being vulcanized, what is the cause of this, so how to reduce the silicone tube to avoid viscosity, silicone keys. 1, silicone tube extrusion after the two vulcanization before adding isolation agent. 2, silicone tube surface sandblasting should be related to the extrusion mouth. 3. The main reason is the ratio of silane coupling agent, hydroxyl silicone oil, stearic acid sealing ring zinc and vulcanizing agent in mixing silica gel. It is necessary to specifically design the ratio of mixing silica gel material and mixing process. 4. If the viscosity of silica gel is too high, you can adjust the formula in the next production, and add more base material 107 and silicone oil suitable for liquid silica gel. Or add less meteorological silicon without changing the base material and silicone oil. The specific situation is determined according to the required properties of the adhesive. At the same time in the future production pay attention to the yield value of calcium powder, sometimes the moisture content of silicone products factory is too high will also affect the viscosity. Silicone rubber tube is added to a double-roll rubber mill or a closed kneader, and gradually added with white carbon black and other additives for repeated refining and uniformity. According to the requirements of industry product technical standards, silicone rubber key manufacturers are made through extrusion, which can be used for conductive silicone rubber in the electronic industry. The production of silicone rubber tube is very strict when selecting raw materials, because the raw materials will affect the product quality of silicone tube, for the use of some precision is not a trace of error, the seal then the use of silicone tube in the process of impurities is what reason. A silicone tube has an impurity problem. The product before the second stage is perfect. After the second stage, about 10% impurities appear. It looks like a small protrusion on the outside. You can't see anything when you cut the meat and rubber products. Under the microscope, you can see some yellowish brown particles, which can be crushed. White materials have been dried without impurities. Anti-aging agents have not been tried. There are all of them. It is useless to change several batches of materials, I'm going to check the coupling agent. There are impurities only after the second rubber key section. What is the reason. The second stage has high temperature and long time, and some raw materials in it are not completely dispersed. The auxiliary agent is dried and cooled with the furnace. After dosing, thin pass and make triangle bag. After mixing, it is parked for not less than 12 hours. Before using, thin pass and regenerate.

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How to deal with rubber products with cracks

How to deal with rubber products with cracks

2020-11-09 16:31:34

Silicone rubber products are made by using methyl vinyl silicone rubber as the base glue and adding various fillers (reinforcing agent, heat resistant agent, modifier, etc.) through mixing, bookflow, filtration, sulfur addition, molding, extrusion, bonding and other production processes. Silicone rubber products are the activities of producing various silicone rubber products with silicone and rubber as the main raw materials. Silicone rubber products are closely related to people's lives, remote controllers, keyboards, pos machines, scanners, mobile phones, electronic silicone keys dictionary, mobile phone sets, etc. are related to silicone rubber products, what are the characteristics of daily use of silicone rubber products. 1) High and low temperature resistance: it can be used for a long time at 200 ℃, and it is still elastic at -60 ℃. Sealing ring. (2) Electrical insulation properties: The dielectric properties of silicone rubber are excellent, especially the dielectric properties at high temperatures greatly exceed 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. (4) excellent high temperature pressure silicone products factory shrinkage permanent deformation. (5) Good processing performance, easy molding and other advantages, can be extruded hot air vulcanization molding, mold addition molding, plus extension molding and other methods to produce a variety of products. Silica gel products are made of silica gel key manufacturers as the main raw materials. They are all called silica gel products. Silica gel is a porous substance with different particle sizes formed by proper dehydration of silicic acid gel. It has an open porous structure and can absorb many substances. It is a good desiccant, adsorbent and catalyst carrier for sealing. If cracks suddenly appear in silica gel products, how to solve them. 1. Silicone products with particularly high value are suitable for quick bonding. Silicone hot sulfur rubber products are selected for chemical bonding: first clean the surface of silicone products with oil stains, dust, etc., secondly, evenly coat glue on the interface of silicone products to be bonded, put them into a mold, pressurize them at high temperature, and heat them. This one can be repaired by a manufacturer. 2. Rubber keys are suitable for lazy people. Slow-drying glue is selected for slow-speed bonding: first clean the surface of silicone products with oil stains, dust, etc., evenly glue the two silicone products on the interface to be bonded, and fix or press the two for 8~12 hours.

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How to determine the hardness standard of silicone products

How to determine the hardness standard of silicone products

2020-11-07 11:55:48

Silicone tube is the circulation and coating carrier of liquid, gas and other materials. It is widely used in modern industry, national defense industry and daily necessities. When producing silicone tube, a small mistake may make its hardness high. What should I do? If silicone products reduce the hardness of silicone tube and reach the product index, the finished silicone tube cannot change its hardness. This is for vulcanized silicone tube, there are mainly the following methods:. 1. If the cost is not considered, the silica gel key component of the oil can also be increased, and the carbon black parts can be appropriately reduced. If the basic silica gel material has not been produced, the amount of oil must be increased in the formula. The hardness of the finished silica gel tube cannot be changed. 2, or look at what material is the sealing ring silicone tube products, so that it continues to vulcanize, to over vulcanization, can also reduce the hardness, but the performance of the product is not guaranteed. 3. You can use an oven to vulcanize the surface products to return to the original, so as to achieve the purpose of reducing the hardness. The liquid silica gel cannot guarantee the degree index to be achieved. Rubber tube refers to the tube used for gas transportation, which is commonly used in gas welding, gas cutting, various gas shielded welding, plasma arc welding and cutting, etc. What are the inspection standards for rubber tubes used in silicone rubber products, as follows:. 1. Like hose size measurement: inner diameter, outer diameter, outer diameter of reinforcement layer, wall thickness, concentricity, inner and outer layer glue thickness, inner diameter of assembly, the new national standard and ISO have added length and measurement point marks, and stipulated the measurement method of hose length without pipe joints and joints of various pipe silicone key manufacturers. 2. Hydraulic test verification pressure test: check whether the hose and assembly have leakage, deformation and damage for 30s-60s under the verification pressure. Pressure deformation test: keep it for 1 minute under the specified pressure (seal working pressure verification pressure or other pressure lower than the verification pressure), and measure the length and outer diameter change, torsion angle and bending of the hose. Burst pressure test: measure the pressure of rubber products when rubber hoses burst at the specified boosting speed. Leakage test: store for 5min at a static pressure of 70% of the minimum burst pressure and repeat it once to check for leakage or damage. As the test often uses water, which is different from the viscosity of the actual liquid, the burst pressure and leakage pressure measured at normal temperature of rubber keys may be slightly lower. 3. Low temperature bending test Low temperature rigidity: The rubber hose is clamped on a torsion wheel with a diameter of 12 times the inner diameter of the rubber hose. After being parked at low temperature for 6 hours, the ratio of the torque measured when twisting 180 degrees within 12s to the torque measured at standard temperature.

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What is the reason for the unqualified detection of silicone products

What is the reason for the unqualified detection of silicone products

2020-11-06 10:02:51

Analysis of the reasons for the unqualified detection of silicone products. The hygiene and safety of silicone products are highly valued by European and American countries. It has been found many times that the pre-inspection and sampling of exported silicone products are unqualified. The unqualified hygiene indicators of silicone products require us to improve the following three reasons for silicone products and the lax quality control of raw materials. Some factories do not pay much attention to the raw materials used for kitchen tableware. Silicone raw materials with low quality grade are used for the production of food tool products without testing the raw materials. Silicone keys or unqualified color glue and additives are used for coloring in the production process, resulting in unqualified product hygiene. The production process is not standardized. Due to the particularity of the safety requirements of silicone tableware, food silicone products have very strict requirements on the production process. After the product is formed, it takes enough time for the sealing ring to remove volatile substances. In order to pursue efficiency, some factories do not have enough processing time for the products. Enterprises fail to pass the product use conditions. EU and other countries require product testing to be carried out in accordance with their predictable and strict use methods, most factories only produce liquid silica gel customer samples, do not understand the use and use conditions of the product, and are relatively blind in dealing with third-party testing, and even obviously inconsistent with the foreseeable use conditions of the product. Secondary vulcanization of silicone products, secondary vulcanization is also called post-vulcanization. The role of secondary vulcanization in silicone products factory: when silicone rubber is vulcanized with peroxide, peroxide decomposition causes polymer reaction, and low molecular compounds (such as benzene and benzoic acid) are generated in rubber, which will affect the mechanical properties of rubber. Silica gel is a kind of granular, glass silica gel button factory glass. Porous silica is synthesized to prepare sodium silicate. Silica gel has higher hardness than ordinary household gel-like gelatin and agar. It is a naturally occurring mineral refined and processed into any granular or beaded form. The scope of application is soft rubber insoles, sex products, seal handbag shoulder pads, soft toy gifts, fish baits, etc. What are the advantages of molded silicone products. 1. High and low temperature resistance (-30 degrees to 260 degrees). 2, waterproof, fireproof, dustproof. 3. Tensile, tear, earthquake resistance, stable performance, rubber products. 4. High wear resistance, high pressure resistance, soft, non-toxic, tasteless, and environmentally friendly. 5, can achieve the relevant certification of food grade and various exports, commonly used as a catalyst carrier in fluidized bed operations, when used as a catalyst carrier, silica gel is usually impregnated in a solution containing the active component of catalytic rubber keys, so that the solution is absorbed in the pores of silica gel, and the active components are distributed on the surface of silica gel through drying, activation and other procedures, the pore structure of silica gel has an important influence on the properties of the supported catalyst, such as the pore volume and pore size distribution of silica gel.

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