The sulfur in rubber moves to the surface and crystallizes on the surface, a phenomenon known as frosting.This happens to both unvulcanized and vulcanized rubber.When the unvulcanized rubber is sprayed with frost, the adhesion of the rubber material will be difficult, resulting in poor adhesion;If spray frost phenomenon is serious, in the manufacture of molded products or moving mold injection sheet products, ejected sulfur will be retained in the horizontal sag, so, easy to form a lack of glue.This is because the sulfur does not dissolve in the rubber in a short time.The first measure to prevent frosting of unvulcanized rubber is to reduce the sulfur content, but after reducing the sulfur content, the elastic modulus of vulcanized rubber will decrease sharply, and the hardness will also be Bokiti.Na yango, kokitisa ya soufre na motango ya bokebi.
If the amount of sulfur is not reduced, the problem can be solved by adding insoluble sulfur.If all sulfur cannot be replaced with insoluble sulfur, half of the sulfur can be replaced with insoluble sulfur.This almost achieves the desired effect.The above method is applicable to the unvulcanized rubber used in factories facing outward processing.Sulphur, in particular, cannot be Ebombami molai na ba salles ya kobomba biloko ya malili, oyo ekoki kotinda glaçage mpe effet ya soufre insoluble.
After vulcanization of rubber products after a period of time will also occur frosting.As a precautionary measure, the problem of complete vulcanization should be noted before planning to reduce sulphur content.Curing temperature, curing time is appropriate, do not hope to consider a little longer curing time.But in any case, high temperature short time vulcanization is not suitable.Rubber products should avoid direct sunlight and sharp cooling Sima ya vulcanisation mpe esengeli kobombama na esika ya ventilation naturel.Na likambo oyo, zipa récipient na couverture ya elamba oyo esalemi na toile, etc., mpo na kopekisa glaçage.Insoluble soufre esalaka te na glaçage oyo esalemaka sima ya vulcanisation.
En plus, un peu différent na glaçage, ekozala na ba cristaux ya soufre visible na slurry ya caoutchouc ya hiver, soki osaleli loupe, okoki komona polele que oyo ezali quelques cristaux rhombiques.Once ezali na cristallisation ya boye, na kati ya brosse revêtement ya colle ya colle ekozala na suka ya ba cristaux ya brosse, na kati ya concave; mbeli mpo na kosala cristallisation, lokola bande ya marque ya colle longitudinale.
Ba mesures ya prévention ezali boye : Bakisa soufre insoluble oyo ekokani na ndambo ya quantité ya soufre oyo esengeli na kati ya mélange ya soufre, zua kaka quantité oyo esengeli na réservoir ya mortier tango ozali kosalela mortier, mpe bomba mortier oyo esalemi te mpo na mwa ntango na kati ya réservoir ya mortier, mpe niokola yango malembe malembe mpo na kosalela.