发明名称 |
Air-permeable barrier material, packing comprising the material and process for improving the barrier properties of an air-permeable material |
摘要 |
<p>A porous material (e.g. a paper 6) has pores with a range of sizes. A pore modifying agent (comprising particles 8 of a narrow size range) is selectively incorporated within the larger pores (7) to provide zones (9) of high surface area. These greatly reduce the penetrability of the material (e.g. by micro-organisms) while having relatively little effect on its air-permeability. The modifying agent (8) may be incorporated by creating a pressure difference across the material (2), and treating it with a dispersion (e.g. an aerosol) of the modifying agent (8), under conditions of low inertia, and incorporating only a small amount of the agent (8) (e.g. under 1% w/w).</p> |
申请公布号 |
DK170865(B1) |
申请公布日期 |
1996.02.19 |
申请号 |
DK19880004073 |
申请日期 |
1988.07.21 |
申请人 |
BOWATER PACKAGING LIMITED |
发明人 |
TALLENTIRE, ALAN;SINCLAIR, COLIN SAMUEL |
分类号 |
A61L2/26;B01D39/00;B01D39/14;B01D39/18;D21H19/10;D21H19/38;D21H23/02;D21H23/50;D21H27/00;D21H27/08;(IPC1-7):D21H27/08 |
主分类号 |
A61L2/26 |
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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