Dust-retentive article
    5.
    发明授权
    Dust-retentive article 失效
    坚定的文章

    公开(公告)号:US3658578A

    公开(公告)日:1972-04-25

    申请号:US3658578D

    申请日:1970-07-22

    CPC classification number: D06M15/227

    Abstract: Dust-retentive articles, such as tack cloths, dust cloths, air filters, etc., comprise a porous web or sheet which is impregnated up to about 10 weight per cent with amorphous polypropylene of molecular weight in the range of up to about 10,000 and then dried at ambient temperature.

    Abstract translation: 防尘物品,例如粘布,防尘布,空气过滤器等,包括多至多约10重量%的非织造聚丙烯,其分子量最高达约10,000的多孔网或片,以及 然后在环境温度下干燥。

    Pavement laying or patching with aggregate,fabric,and adhesive
    10.
    发明授权
    Pavement laying or patching with aggregate,fabric,and adhesive 失效
    用聚集,织物和粘合剂进行铺设或铺设

    公开(公告)号:US3608444A

    公开(公告)日:1971-09-28

    申请号:US3608444D

    申请日:1969-07-14

    CPC classification number: E01C11/005 E01C7/353 E01C11/165

    Abstract: A FABRIC IS LAID UPON A LAYER OF INTENTIONALLY ROUGH SURFACE OF, SAY, AGGREGATE OR EARTH, ADHESIVE, E.G., ASPHALT, IS APPLIED TO WET THE FABRIC AND THE AGGREGATE OR OTHER SURFACE AND THEN THE FABRIC IS COVERED WITH ADDITIONAL AGGREGATE IN A MANNER TO STRESS OR STRETCH AT LEAST PORTIONS THEREOF BETWEEN THE INTERPOSITIONED OR INTERLOCKING PIECES OR POINTS OF THE TWO LAYERS OF AGGREGATE. THE THUS LAID COMPOSITE CAN BE FURTHER COVERED WITH ADHESIVE AS BY SPRAYING AND THEN ROLLED IN ONE EMBODIMENT, WRINKING AND BUBBING OF THE FABRIC CONTAINING COMPOSITE, AS IN A ROAD SURFACE OR PATCH, IS PREVENTED. A FABRIC NOW PREFERRED TO BE USED AND WHICH HAS PRESENTED THE WRINKLING AND BUBBLING PROBLEM IS ONE MADE OF A HEAT SEALED NONWOVEN POLYOLEFIN FABRIC, E.G., POLYPROPYLENE.

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