Is silicone rubber rubber???? What is the difference between silicone and rubber?

Silicone rubber is rubber, it is a special rubber with excellent properties, such as heat resistance and cold resistance.

Be! Heat resistance: Silicone rubber has much better heat resistance than ordinary rubber, and can be used almost forever at 150 degrees without performance change; 10,000 hours of continuous use at 200 degrees; It can also be used for a period of time at 350 degrees.

It is widely used in the occasions that require heat resistance: hot water bottle seals, pressure cooker rings, heat-resistant handles.

Cold resistance: Ordinary rubber is -20 degrees -30 degrees later, that is, silicone rubber still has good elasticity at -60 degrees -70 degrees, and some special formulas of silicone rubber can also withstand extremely low temperatures. Cryogenic seals.

Weather resistance: Ordinary rubber degrades rapidly under the action of ozone produced by corona discharge, while silicone rubber is not affected by ozone. And under ultraviolet rays and other climatic conditions for a long time, its physical properties only change slightly. Sealing materials for outdoor use.

Electrical properties: Silicone rubber has a high resistivity and remains stable over a wide range of temperatures and frequencies. At the same time, silicone rubber has good resistance to high-voltage corona discharge and arc discharge. High voltage insulators, TV high voltage caps, electrical parts, etc.

Electrical conductivity: When a conductive filler such as carbon black is added, the silicone rubber has conductive contacts for the keyboard.

Thermal conductivity: Silicone rubber has thermal conductivity when certain thermally conductive fillers are added, heat sinks, thermal conductive gaskets, thermal conductive rollers for photocopiers and fax machines.

Radiation: The radiation resistance of silicone rubber containing phenyl group is greatly improved in electrically insulated cables, connectors for nuclear power plants, etc.

Flame retardant: Silicone rubber itself is flammable, but when a small amount of flame retardant is added, it is flame retardant and self-extinguishing; And because silicone rubber does not contain organic halides, it does not smoke or emit toxic gases when burned. All kinds of occasions with strict fire prevention.

Breathability: Silicone rubber film has better air permeability than ordinary rubber and plastic wax film. Another feature is its high selectivity for different air permeability. Gas exchange membrane medical supplies Artificial organs.

Silicone rubber is rubber with improved properties, such as oil resistance, heat resistance, etc.!

Difference Between Rubber and Silicone:

1. The scope of the two definitions is different. Rubber is a general term that includes many types, such as natural rubber, butadiene rubber, styrene-butadiene rubber, hexapropylene rubber, and of course, silicone rubber; And silicone is one of the specific varieties in rubber.

2. Rubber has a wide range of uses, mainly using the elastic effect of rubber, such as rubber tires, bridge shock absorption, hose rubber rollers, etc., mainly for industrial applications; Silicone is mostly used in food appliances, such as pacifiers, children's spoons, voltage cooker seals, etc.

3. Different types and grades of rubber are used differently, for example, natural rubber is mainly used for tires, butyl rubber is mainly used for inner tubes, and EPDM rubber is used for sealing products.

The difference between silicone and rubber lies in different properties, different compositions, different characteristics, and different application ranges.

1. Different properties: Silicone is a kind of silicone rubber, which belongs to one-component liquid rubber vulcanized at room temperature, and is a granular porous silica hydrate. Rubber is a highly elastic polymer compound with a polymer structure of isoprene.

2. Different compositions: Silica gel is a highly active adsorption material, and the main component is silica. Rubber is made by processing and producing latex obtained from rubber plants, and the main part is latex, which is produced in rubber trees.

3. Different characteristics: silica gel has good adsorption, insoluble in water, and high heat resistance. Not only can it attach a variety of substances, but it is also chemically stable and does not burn.

Rubber has high elasticity, abrasion resistance, high tearing strength and elongation, and is flammable. It is highly malleable and can change different shapes, but it is easy to soften in a high-temperature environment.

4. Different application ranges: silica gel is stable in nature, mainly used as a desiccant and an adsorbent in column chromatography and thin layer chromatography. In addition, the breast augmentation and cosmetic industry also often uses silicone as a filler material.

Rubber is divided into natural rubber and synthetic rubber, and the use of rubber products is very wide, and rubber products are often used in large machines, industrial equipment, and automobile transportation equipment.

How to distinguish silicone from rubber:

1. Weighing method: Even for two silicone rubber products with the same size and color, we can analyze the silicone and rubber by weighing comparison, because the density of the silicone material is much lower than that of the rubber material.

2. Low temperature resistance: By leaving the silicone product and rubber product in a low temperature environment for three to five minutes, you can feel the softness and hardness between the two in a specific low temperature environment. The silicone material is softer and the rubber material is harder.

3. Combustion method: By burning silicone and rubber products at high temperatures, we can analyze the material of the product. For example, silicone burns with white smoke and produces a white powder after burning, while most rubber emits black smoke.

With the increasing number of feeding supplies such as silicone cups and silicone bottles, parents want to buy silicone bottles or cups when buying feeding supplies for infants and young children, but they are not sure which type of silicone they belong to. So, is silicone rubber? Does it belong to rubber?

Silicone is not rubber, and silicone is not rubber, they are different materials:

1. Silica gel is an amorphous substance, it is non-toxic, harmless, stable chemicals, under the action of strong acid and strong alkali, it is not easy to undergo stool slippery reaction, it is not easy to be allergic after contact, and contact with other tissues will not change the elasticity and softness, and it is not easy to deteriorate, melt and emit toxicity in a high-temperature environment. Therefore, Zaoqi silicone has many advantages, and it has been used in many aspects, such as the manufacture of medical beauty materials, desiccant, adsorbents, various milk bottles and cups and other daily necessities.

2. Rubber is the emulsion of the rubber tree, which is obtained by processing, and its elasticity is very good, which can play the role of cushioning and shock absorption; It has strong plasticity and can be used in the manufacture of various products; The morphology is easy to change at high temperatures, so rubber products are not suitable for use in ultra-high temperature environments. Rubber is suitable for making various daily necessities such as warm water bags, rain boots, latex pillows, and mattresses.

If you are buying bottles, nipples, and cups, it is better to choose silicone materials.

The difference between rubber and hot melt adhesive: the material of low-temperature hot melt adhesive is memory elastic after setting, waterproof and not deformed. However, the traditional chemical Gangbao is hardened after shaping, which will soften and cause deformation after a long time.

The material used is a bit like cardboard, and the shaping film used between the shoe fabric and the lining is used. Low-temperature hot-melt adhesive, high film strength, good toughness, can meet the requirements of heat resistance and cold resistance at the same time, good compatibility with other additives, wide use, can adhere to many substrates with different properties, low melt viscosity, easy sizing, high quality.

Question: What are the characteristics of medical hot melt adhesives?

What is the difference between medical hot melt adhesive and medical rubber?

In addition to the general performance of hot melt pressure sensitive adhesive, it has characteristics in the coating operability of glue, hypoallergenic, adhesion, air permeability and stability of glue due to its own use environment.

Is the question still there.

Question: What is the difference between medical hot melt adhesive and medical rubber?

Answer: After the low-temperature hot melt adhesive is set, the material is memory elastic, waterproof and not deformed. However, the traditional chemical Gangbao is hardened after shaping, which will soften and cause deformation after a long time. The material used is a bit like cardboard, and the shaping film used between the shoe fabric and the lining is used.

Low-temperature hot-melt adhesive, high film strength, good toughness, can meet the requirements of heat resistance and cold resistance at the same time, good compatibility with other additives, wide use, can adhere to many substrates with different properties, low melt viscosity, easy sizing, high quality.

Silicone belongs to a category of rubber, and it belongs to a type of synthetic rubber! Rubber can be divided into natural rubber and synthetic rubber.

According to the appearance of rubber: rubber can be divided into four categories: solid rubber (also known as dry rubber), emulsion rubber (referred to as latex), liquid rubber and powder rubber.

According to the properties and uses of rubber: in addition to natural rubber, synthetic rubber can be divided into general synthetic rubber, semi-general synthetic rubber, special synthetic rubber and special synthetic rubber.

According to the physical form of rubber: rubber can be divided into hard rubber and soft rubber, raw rubber and rubber compound, etc.

According to performance and use: general rubber and special rubber.

Rubber can be classified as: natural rubber, general rubber, styrene-butadiene rubber, nitrile rubber, silicone rubber, butadiene rubber, ethylene propylene rubber, neoprene.

Silicone: Silicone is only one type of rubber, which can be divided into organic silicone and inorganic silicone.

Inorganic silica gel is further divided into: macroporous silica gel, coarse-pore silica gel, type B silica gel, and fine-porous silica gel. Inorganic silica gel can also be divided into beer silica gel, pressure swing adsorption silica gel, medical silica gel, color-changing silica gel, silica gel desiccant, silica gel opening agent, toothpaste silica gel, etc.

Silicone is mainly divided into four categories: silicone rubber, silicone resin, silicone oil, and silane coupling agent, which is mainly used to produce silicone products with various material properties, and it is mainly divided into several processes such as molded silica gel, extruded silica gel, liquid silica gel, and special silica gel.

Silicone is a type of silicone rubber, which belongs to one-component liquid rubber that is vulcanized at room temperature. Once exposed to air, the silane monomer in it will condense to form a network structure, the system is cross-linked, can not be melted and dissolved, elastic, into a rubber state, and at the same time glue the object. It has slightly higher thermal conductivity than ordinary rubber, and once cured, it is difficult to separate the bonded objects.

Polymer compound with high elasticity of rubber. This includes both unsulphurized and vulcanized varieties. It can be divided into two categories: natural rubber and synthetic rubber.

Natural rubber is processed from latex obtained from rubber plants. Synthetic rubber is produced by polymerization or polycondensation of monomers. Unvulcanized rubber is commonly known as raw rubber or raw rubber.

Rubber that has been vulcanized is called vulcanized rubber, commonly known as cooked rubber or rubber. It is widely used in the manufacture of tires, hoses, tapes, insulating materials, rubber shoes, and other rubber products.

Silicone swim caps are mainly made of high-grade silicone, which is soft to the touch, has strong elongation, and is very durable.

First, the nature is different.

1. Ordinary rubber properties: high elastic polymer material with reversible deformation.

2. Silicone rubber properties: the backbone is composed of silicon and oxygen atoms alternately, and the silicon atoms are usually connected with rubber with two organic groups.

Second, the characteristics are different.

1. Characteristics of ordinary rubber:

1) Rubber contains 92%-95% of rubber hydrocarbons, while non-rubber hydrocarbons account for 5%-8%. The proportions of these ingredients may vary depending on the production method, the different origins, and even the different picking seasons, but they are basically within the range.

2) The branching of the rubber macromolecular chain forms a gel. Gels are not conducive to the performance and processing of rubber. In the process of preparing rubber, various coordination agents often cannot enter the gelling area, forming a local blank, unable to form reinforcement and cross-linking, and becoming a weak link in the product.

2. Silicone rubber features:

1) High temperature performance. Silicone rubbers are characterized by their high temperature stability. The strength of silicone rubber at room temperature is only half that of natural rubber or some synthetic rubber, but at high temperatures above 200, silicone rubber can still maintain a certain degree of flexibility, resilience and surface hardness, and there is no significant change in mechanical properties.

2) The glass transition temperature of low-temperature silicone rubber is generally -70 -50, and the glass transition temperature of special formula can reach -100, indicating that it has excellent low-temperature performance. This has important implications for the aerospace industry.

3) The Si-O-Si bond in weather-resistant silicone rubber is very stable to oxygen, ozone and UV rays. It does not contain any additives and has excellent weather resistance.

4) Electrical performance. Silicone rubber has excellent insulation, corona and arc resistance.

1. The scope of use is not the same.

The DU performance of rubber is often not as comprehensive as zhi silicone products, DAO silicone in the family version of the right to use, used in catering, are very in line with the needs of many friends, and rubber for many friends, is a toxic substance, rarely used in life, so now rubber products are basically used in some industrial manufacturing, because silicone is relatively higher than rubber, but in the same performance, or choose rubber material.

2. The structure is different.

Silicone rubber refers to rubber whose backbone is composed of alternating silicon and oxygen atoms, and two organic groups are usually attached to the silicon atoms. Ordinary silicone rubber is mainly composed of silicon-oxygen links containing methyl groups and a small amount of vinyl.

3. The performance characteristics are different.

The introduction of phenyl group can improve the high and low temperature resistance of silicone rubber, and the introduction of trifluoropropyl and cyano groups can improve the temperature and oil resistance of silicone rubber. Silicone rubber has good low temperature resistance and usually works at -55; Ordinary rubber is characterized by good elasticity, high strength and good comprehensive performance.