Medical Silicone

Medical grade materials 

Medical Silicone has long been a popular material for medical device manufacturers due to its physical properties with durability, ease of molding by many methods, wide useful temperature range, chemical resistance, high tensile strength, heat resistance, thermal stability, the vast range of available durometers, biocompatibility with multiple components, and compatibility with many sterilization methods.

The inorganic silicon-oxygen structure and the molecular structure of organic groups in silicone rubber make it a typical semi-inorganic polymer. The characteristics of this unique molecular structure endow silicone rubber with special properties, making it a kind of special polymer material. From a physiological point of view, silicone materials are one of the most inactive compounds currently known and possess physiological inertness and flame retardancy that other compounds do not possess. Liquid silicone rubber and high consistency rubber are extremely versatile materials in the biological, microbiological, and medical industries.

As long as the cross-linking and catalytic system of the silicone elastomer is correctly selected, the fully vulcanized silicone rubber is odorless, tasteless, non-toxic, very resistant to biological aging, has good biocompatibility, and has a slight reaction with skin contact. It is basically harmless to the human body, has basically no adverse effects on the environment, and has excellent physiological inertia.

Benefit from the following manufacturing advantages:

1. Pre-production samples for all orders before production starts

2. Free packaging services

3. Precision manufacturing on branded CNC equipment

4. Experienced engineers to monitor the entire production process

5. Stable after-sales service

6. 24-hour warehousing service and logistics support

7. Wholesale and retail experience

8. Quality control, including raw material incoming inspection, process intermediate product inspection, finished product factory full analysis inspection

9. Invest more than 12% of sales in R&D each year

Applications

Medicine

Medical Devices

1. As a substitute for organs or tissues that can be indwelled in the human body for a long time

2. As a short-term indwelling material in the human body, it has the functions of rehydration, drainage, injection, etc.

(1) Medical grade silicone rubber tube

Silicone rubber has anti-stick properties, physiological inertness, and anti-aging properties, so it can exist stably in sterilization heating and in biological liquids. Therefore, silicone rubber can be used as an important auxiliary material in medical rescue and treatment, including catheters, peritoneal dialysis tubes, medical seals, and intravenous cannulae.

(2) Silicone defoamers and agents

Silicone materials play an important role in the treatment of gastric diseases such as indigestion, gastric bleeding, and gastric ulcers. In the process of gastroscopy, the defoaming properties of silicone antifoams can be used to eliminate foam so that it does not hinder the inspection. Silicone defoamer can also be used in the rescue process of acute emphysema. It can quickly clear the respiratory tract, improve the hypoxia of patients, and reduce or avoid the situation that the foam obstructs the respiratory tract and causes the patient to suffocate and die. In addition, silicone antifoams can also relieve indigestion, relieve abdominal distension in hepatitis patients, and relieve cough symptoms.

3. Indwelling in the body as a carrier of drugs, long-term efficacy

Prolonging drug efficacy and improving drug action time by safe means is an important topic in the field of medicine and pharmacy. Silicone rubber capsules are widely used as research results. Silicone rubber can be used as a supply library for drugs such as antibiotics, vaccines, and anesthetics. The drug slowly penetrates the silicone rubber capsule wall to effectively control the release of the drug, so it can exert long-term efficacy.

Due to their inertness and excellent biocompatibility, silicone materials have unique and irreplaceable advantages in medical applications and are being used by more companies in the medical field. From infusion tubing, cochlear implants, prosthetics to orthodontic dental molds, wound care, etc., silicone materials are actively protecting human health in various forms.

4. Drug-eluting implantable devices

One application where medical-grade silicones really shine in the medical industry is drug-eluting implantable devices. Before the molding process, silicones can be compounded with active pharmaceutical ingredients (APIs) such as cancer drugs or hormones which can then be steadily released into a targeted area of the patient’s body over time once that molded implant is inserted.

Drug-eluting implants are able to maintain the desired level of the API in the patient much more consistently and over a longer period of time than both pills and injections. Also, since the implant can usually be inserted near the targeted organ or tissue, lower total amounts of API are needed because that API doesn’t need to spread throughout the entire body before reaching the targeted area.

As a result, the level of the API in the patient’s body remains inside the therapeutic window (the broad range of concentrations between too low to be effective and high enough to be toxic) for a much longer duration.

As we’ll see shortly, medical-grade LSR is a great material for making drug-eluting implants, due to its processing advantages.

Silicone Dental

Silicone medical grade materials are widely used in the field of dental impression materials due to their excellent properties. Among them, addition silicone rubber is the most widely used in dental impression materials.

Silicone dental impression material base polymer is vinyl polysiloxane-vinyl silicone oil, and its cross-linking agent is hydrogen-containing silicone oil, such as XJY silicone's XJY-702 series of low-hydrogen silicone oil, XJY-711 end Hydrogen-containing methyl hydrogen siloxane and dimethyl hydrogen siloxane copolymer are all cross-linking agents that can be practically used in the application of silicone dental impression materials. The catalyst is the platinum catalyst, etc., and vinyl MQ is also used. Silicone resin is the application direction of advanced performance improvement.

Vinyl MQ silicone resin is mainly used as an extension of the main vinyl polysiloxane. The three-dimensional resin provides additional mechanical properties and reinforcing structures in addition to the main long-chain vinyl polysiloxane. XJY- 8206 vinyl resin is a mature vinyl MQ silicone resin, which can be used as a good choice. White carbon black is also one of the reinforcing agents for silicone dental impression materials. It has a good reinforcement effect on the system. However, it has a great influence on the viscosity of the rubber compound, so it needs to be used together with vinyl MQ silicone resin, which has a relatively weak reinforcing effect but has little influence on the viscosity. At the same time, attention should be paid to the dosage of the two, too much or too little can not obtain the ideal material properties. Adding a certain amount of vinyl MQ silicone resin can increase the tear strength, hardness and tensile strength of the system, but adding too much will reduce the elasticity of the system, and excessive crosslinking will lead to a decrease in tear resistance and tensile strength. The main purpose of adding VMQ silicone resin to the oral impression material of the system is not to improve the strength and elasticity, but to improve the hardness of the vulcanizate without significantly affecting the viscosity. Choose the amount that will give you a lower viscosity compound.

After the host material and the cross-linking agent are mixed, the addition reaction occurs between the vinyl group of vinyl polysiloxane and the silicon-hydrogen bond of the hydrogen-containing silicone oil activated by the catalyst. There is no side effect, the reaction time is relatively short, and the size is good. Accuracy and dimensional stability. At the same time, the network polymer formed by crosslinking has stable properties, and the structure can move flexibly under force, so the material has good mechanical properties and ductility.

Characteristics of silicone dental impression materials

Oral impressions are made in the oral cavity, and it is necessary to accurately and safely describe and record the state of the teeth in the oral cavity. Therefore, silicone dental impression materials have the following characteristics:

1. Good biosafety: harmless to the human body during short-term contact with oral tissues.

2. Good fluidity and plasticity: it can flow to all fine parts of the mold-taking area before curing, accurately reflecting the fine structure of oral tissue.

3. During the operation, the curing time of the material can give the operator enough working time.

4. Good matching with gypsum material later.

5. Good elasticity, mechanical strength and dimensional stability.

6. The taste is comfortable and there is no unpleasant taste.

8. Easy to operate and reasonable price.

Product Question

What is the MOQ?

For our existing regular in-stock products, the MOQ starts from 1 piece.

If you would like to customize a product with a specific specification, please contact us to determine the MOQ.

Do you offer a delivery service?

Of course, we are happy to provide our customers with a substitute shipping service.

We also offer a courier service with different prices and delivery times depending on your needs.

Your order will be delivered quickly and safely. Our professional team will also help with any urgent.

What is the sample fee?

Samples up to 1KG are free of charge, and shipping costs are paid on delivery.

For a large amount of sample cost, please contact us to discuss.

What’s the packaging?

XJY-701 Polymethylhydrosiloxane：25kg/200kg Drum

XJY-702 Methylhydrosiloxane, Dimethylsiloxane Copolymer：25kg or 200kg Drum

XJY-706 1.1.3.3-Tetramethyldisiloxane：40kg/130kg Drum

XJY-711 Hydride Terminated Methylhydrosiloxane Dimethylsiloxane Copolymer：190kg Drum

XJY-8206 VMQ silicone Vinyl resin: Powder 25KG Drum / Liquid 200KG Drum

What is the lead time for production?

For our existing regular stock products, we usually need 7-15 days, the lead time may be longer for higher quantities, depending on the actual delivery date of the factory.

For custom products, please contact us to determine the exact lead time.

Do you provide warehousing services for my product orders?

We offer a professional 24-hour monitored warehousing service for every customer.

What are your payment terms?

For samples, 100% T/T in advance.

For orders: 50% TT in advance, 50% balance before shipment

For large long-term orders, please contact us to discuss payment terms.

How long does MQ resin last?

We use high-standard raw materials to produce silicone pressure-sensitive adhesive, the product is valid for 12 months from the production date under the original unopened package, and the storage temperature is 25℃ and below. If the storage period is exceeded, the product should be retested and can still be used if it meets the quality requirements.