发明名称 |
Process for the manufacture of paperboard cartons |
摘要 |
This invention relates to an improvement in a process for forming a carton from paperboard stock comprising the steps: applying an aqueous based adhesive to select parts of a paperboard carton blank obtained from a paperboard feedstock; drying the aqueous based adhesive; folding the select parts of the adhesive coated carton blank onto cooperating parts of the paperboard blank; and, heat sealing the select and cooperating parts thereby forming the carton; wherein the aqueous based adhesive is comprised of a vinyl acetate/ethylene polymer formed by emulsion polymerization and having (a) a crystalline melting point (T<SUB>m</SUB>) ranging from 35 to 110° C., preferably 50 to 90° C.; measured at a heat rate of 20° C./minute and, (b) a tensile storage modulus of at least 1x10<SUP>4 </SUP>dynes/cm<SUP>2 </SUP>at 115° C. measured at 6.28 rad/sec.
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申请公布号 |
US7238149(B2) |
申请公布日期 |
2007.07.03 |
申请号 |
US20050029292 |
申请日期 |
2005.01.05 |
申请人 |
AIR PRODUCTS POLYMERS, L.P. |
发明人 |
LORENZ RANDOLPH JOHN;DANIELS CHRISTIAN LEONARD;RABASCO JOHN JOSEPH |
分类号 |
B31B1/62;B31B1/64 |
主分类号 |
B31B1/62 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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