and the isotactic strength of the soda lime borosilicate glass is about 500 p s i in preparing the plastisol powdered vinyl resin is first completely dispersed within the plasticizers and other additives e g lubricant uv stabilizer heat stabilizer and charged within a suitably sized reaction vessel and then mixed and agitated for five minutes until blended the amount of plasticizer based on weight of vinyl should generally be within the range 45 to 55 parts per hundred weight of vinyl lubricants and other known additives may be added in amounts sufficient to achieve the desired properties for both the plastisol as well as for the finished coating lubricant may be added at a concentration from about 2 to about 4 wt based on the weight of the entire plastisol formulation the vinyl resin may be added and mixed at low speeds until coated with the plastisizers the resulting paste is then mixed at a higher speed for to continue to disperse the resin within the plasticizer and additive blend to form a uniform base composition a mixing time of about ten minutes is generally suitable the aforementioned ptfe powder may then be added to the base and mixed thoroughly to provide a uniform mix ptfe is typically added to the plastisol at a concentration within the range from 1 to 10 by weight based on the weight of the aforementioned base and preferably within the range from 2 to 5 the tmptma or other acrylic monomer may be added to the plastisol blend and mixed at a medium speed for suitable period of time e g 20 minutes acrylic monomer is added to the plastisol at a.