Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1995-05-22
1997-10-28
Warzel, Mark L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525 88, 601 11, 601 14, 601 15, 601904, 428 357, 428 369, C08L 5300, B29D 2300, A61F 1320
Patent
active
056818947
ABSTRACT:
There is provided a tampon applicator, particularly an applicator barrel, comprising a unique compound to provide a soft, flexible applicator barrel that is more comfortable and has improved ease of insertion. The polymeric compound primarily comprises a thermoplastic resin and a block copolymer that exhibit unique load, energy and modulus of elasticity properties. The polymeric compound should also include a plasticizer and a compatibilizer/flow modifier, and may include a slip/mold release agent, and antioxidants, and even a pigment. There is also provided a method for making the polymeric compound that will be formed into an applicator or applicator barrel in which all of the above ingredients, except for the thermoplastic resin, are combined and formed into soft pellets. The soft resin pellets are then dry blended with pellets of the thermoplastic resin. The mixture of the thermoplastic resin pellets and the soft resin pellets are then melted and injection molded into the desired shape of the applicator or applicator barrel.
REFERENCES:
patent: 3765416 (1973-10-01), Werner et al.
patent: 3807399 (1974-04-01), Morman et al.
patent: 3895634 (1975-07-01), Berger et al.
patent: 4678834 (1987-07-01), Boivin et al.
patent: 5135475 (1992-08-01), Nakanishi et al.
Williams Karla E.
Zwick Paul D.
Playtex Products Inc.
Warzel Mark L.
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