| 发明名称 |
PROCESSO DE FORMACAO DE MATERIAL TUBULAR DE MULTI-FOLHAS E PROCESSO DE FORMACAO DE UM TUBO DE UMA UNICA FOLHA |
| 摘要 |
The invention provides a method of forming plastic tubing and particularly multi-walled plastic bags wherein the seal area is strengthened by utilizing a plurality of layers of material in the seal area. |
| 申请公布号 |
BR8500356(A) |
申请公布日期 |
1985.09.10 |
| 申请号 |
BR19858500356 |
申请日期 |
1985.01.25 |
| 申请人 |
TWINPAK INC. |
发明人 |
PAUL E. AUBRY;JOSEF POKLUKAR |
| 分类号 |
B32B1/08;B29C53/38;B29C65/40;B31B1/62;B31B19/60;B31B39/00 |
主分类号 |
B32B1/08 |
| 代理机构 |
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| 主权项 |
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