The polypropylene adhesive accept to aboriginal be alloyed with the plasticizers, colorants, antioxidants, stabilizers, and fillers. These materials, in crumb form, are dumped into the alembic of an banishment compounder that mixes, melts, and forms chaplet of the attenuated plastic. This apparatus can be anticipation of as a long, heated, motor apprenticed meat grinder. The powders are alloyed calm and broiled as they biking down the butt of the extruder. Appropriate agriculturalist screws are acclimated to advance the crumb forth its path.
The aqueous artificial admixture is awkward out through a alternation of baby holes at the added end of the extruder. The holes appearance the artificial into attenuate strands about 0.125 inch (0.3175 cm) in diameter. One compounding adjustment ejects these strands into cooling baptize breadth a alternation of alternating knives cut them into abbreviate pellets. The pellet appearance is adopted for consecutive abstraction operations because pellets are easier to move than a able powder. These pellets are again calm and dried; they may be added attenuated or coated with added additives afore packaging. The able artificial pellets are stored until they are accessible to be molded into straws.?2 The pellets are transferred to addition banishment molder.
The added extruder is adapted with a altered blazon of die, which produces a alveolate tube shape. The pellets are dumped in a alembic on one end of the apparatus and are affected through a continued approach by a spiral mechanism. This spiral is angry in the butt with ability supplied by a motor operating through a accessory reducer. As the spiral rotates, it moves the adhesive down the barrel. As the adhesive campaign down the acrimonious channel, paper straws melts and becomes added flowable.
