Medical Grade Silicone

Medical-grade silicone materials

Medical-grade silicone production has long been a popular choice for medical device manufacturers. This is largely due to its outstanding physical properties: durability, ease of molding through various methods, a wide useful temperature range (including performance under extreme temperatures), chemical resistance, high tensile strength, heat resistance, thermal stability, the vast range of available durometers, biocompatibility with multiple components, compatibility with many sterilization methods, and more.

The silicon-oxygen backbone, along with specific organic groups in silicone rubber, makes it a typical semi-inorganic polymer. These unique molecular structures give silicone rubber special properties, making it a stand-out material in medical-grade silicone production. 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, supporting applications throughout the biological, microbiological, and medical industries.

When the correct cure system—including cross-linking and catalyst—is used for the elastomer, fully vulcanized silicone rubber is odorless, tasteless, non-toxic, highly resistant to biological aging, and provides excellent biocompatibility. Skin contact usually leads to only a minimal response. It is essentially harmless to humans, presents no significant environmental risk, and shows excellent physiological inertness.

Our medical silicone products 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, and finished product factory full analysis inspection

9. We invest more than 12% of sales into R&D each year to further improve techniques for producing medical-grade materials.

Applications

Medicine & Medical Devices

1. Long-term implantable substitute for organs or tissues:

2. In dentistry, soft pads made with medical silicone are placed on dental tissues to cushion and improve chewing.

(1) Medical-grade silicone rubber tube:

Silicone is anti-stick, physiologically inert, and resistant to biological aging, so it easily withstands sterilization and exposure to bodily fluids. It is used in catheters, peritoneal dialysis tubes, medical seals, and intravenous cannulae.

(2)Silicone defoamers and agents:

Medical-grade silicone production also provides agents for treating gastric diseases, like indigestion or bleeding. During gastroscopy, their defoaming effect improves visibility, while they help clear airways in acute emphysema. These agents also relieve abdominal distension and cough symptoms related to hepatitis.

3. Indwelling drug carriers for long-term efficacy

Safe long-term implantable drug release is increasingly important for modern medicine. Silicone rubber capsules serve as reservoirs for drugs such as antibiotics, vaccines, and anesthetics, enabling slow, controlled release for extended efficacy.

Due to its inertness and biocompatibility, medical-grade silicone holds unique advantages in these applications, found in infusion tubing, cochlear implants, prosthetics, orthodontic molds, wound care products, and more.

4. Drug-eluting implantable devices

A key area for medical-grade silicone production is drug-eluting implantable devices. Before molding, medical silicone compounds can be blended with active pharmaceutical ingredients (APIs), such as cancer medication or hormones. After the molded implant is surgically inserted, the silicone gradually releases the API into the body over time.

These long-term implantable devices maintain the targeted API levels more consistently and for a longer period than pills and injections. Devices can be inserted directly near the targeted organ or tissue, requiring less API and improving therapeutic precision.

By keeping the API inside the therapeutic window—between ineffective doses and toxic side effects—for longer, silicone-based drug-eluting implants improve both patient safety and treatment outcomes. Medical-grade LSR (Liquid Silicone Rubber) is favored for these uses, due to processing advantages and suitability for highly controlled release.

Silicone Dental

Medical-grade silicone materials play a major role in dental impression materials because of their superior properties. Among these, addition-cured silicone rubber—often using a peroxide-cured or platinum-cured system—is the most widely used option for producing dental impressions.

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.

Silicone dental impression material characteristics:

• Good biosafety: harmless during short-term oral contact.
• Good fluidity and plasticity for capturing fine tissues before curing.
• Sufficient working time during operations due to manageable curing.
• Good compatibility with gypsum afterward.
• Excellent elasticity, mechanical strength, and dimensional stability.
• Comfortable in taste, without unpleasant flavor.
• Easy operation and reasonable pricing.

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.