What lubricant is used for PVC urinary catheters except paraffin oil

The role of PVC lubricants is to reduce the friction between the polymer and the device, as well as the internal friction between the polymer molecular chains. The former is called external lubrication, and the latter is called internal lubrication. It has external lubrication such as silicone oil, paraffin, etc., and has internal lubrication such as monoglycerides, stearyl alcohol and esters.

As for metal soaps, it's a bit of both. In addition, it should be noted that the statement of internal and external lubrication is only a habitual name for us, and there is no obvious boundary, some lubricants play different roles in different conditions, such as stearic acid, at low temperature or a small amount, it can play an internal lubricating role, but when the temperature rises or the amount increases, its external lubrication effect gradually prevails, and there is a special case of calcium stearate, which is used alone as an external lubricant, but when it is used in conjunction with hard lead and paraffin, it becomes an internal lubricant to promote plasticization.

In rigid PVC plastics, excess lubricant can lead to a decrease in strength and also affect process operations. Peeling can occur in the case of injectable products, especially in the vicinity of the gate. For injection products, the total dosage of stearic acid and paraffin is generally in parts

Extruded products generally do not exceed 1 part.

In soft product formulations, too much lubricant can cause frosting and affect the strength of the product and the high-frequency welding and printability. Too little lubricant will stick to the roller, and for blown film, too little lubricant will stick to the mold, which is easy to make the plastic coke in the mold. At the same time, in order to improve the stickiness of the blown film, it is advisable to add a small amount of monoglycerides, an internal lubricant.

In the production of PVC soft products, the amount of lubricant added is generally less than 1 part.

PVC paraffin oil is fine, right? Why not.

Paraffin oil can lubricate rubber urinary catheters, but silicone oil is even better!!

Depending on what products you make, it is better not to use paraffin wax for things with high quality requirements, because it is not compatible with PVC resin. Stearic acid is also generally used.

Of course, the internal and external lubrication needs to be coordinated.

Give a little explanation from the material profession:

First of all, it is very important to determine what material the urethral catheter is, latex without cysts: generally sterile water-based, oil-based lubricants can be, such as water-based, some special hydrogels, oil-based silicone oil, paraffin oil, etc.

Latex bladder: paraffin oil lubricants are prohibited. Until now, many hospitals have been using paraffin oil lubrication, which is very bad and will destroy the balloon.

Explanation: Similar and compatible, no matter what kind of lubricant it is, it should correspond to the catheter material. If one of the materials is a non-polar material, then a lubricant of a non-polar material should be selected.

It must be lubricated with a special oil-based cotton wool that comes with the catheterization kit.

Paraffin oil is used for skin care, hair care, cleaning and other daily chemical makeup products; Textile family auspicious softener preparation spike polishing brightener; cutting oils; metal forming lubrication rust inhibitors; lubricants for plastic pipe forming; Leather softener, brightener and other imitation buckets.

Generally, sterile water-based and oil-based lubricants can be used, such as some special hydrogels, oil-based silicone oils, paraffin oils, etc.

Liquid paraffin (paraffin oil, mineral oil) is usually used.

It is also possible to use body lubricants.