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Coated paper beaker with sealed thermoplastics lid - has weak filler material in hollow adjacent top of side wall seam
Coated paper beaker with sealed thermoplastics lid - has weak filler material in hollow adjacent top of side wall seam
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机译:带有密封热塑性塑料盖的涂布纸烧杯-在侧壁接缝的顶部附近的中空具有弱填充材料
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摘要
Paper beaker of coated material has a lapped (vertical) wall seam which continues into the curled-over edge rim of the beaker. A thermoplastics cover is sealed onto the rim and the hollow corner between this cover and the rim in the region of the seam is filled with a thermoplastics material having a lower strength than the material with which the paper is coated. More specifically, this material has low viscosity when melted. Preferably it is a wax. This arrangement means that when the beaker is opened by pulling off the top there is less risk of the coating being pulled off the saturated paper or a saturated region of the rim kinking. A typical coating material (not claimed) for the paper is polyethylene.
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