Rope and its manufacture专利检索-消光剂油漆与涂料专利检索查询-专利查询网

Rope and its manufacture

阅读：692发布：2023-05-10

专利汇可以提供Rope and its manufacture专利检索，专利查询，专利分析的服务。并且Rope having improved working qualities and hand without need to contain sizing or lubricants consists of a plurality of strands of fibrillated polyolefin film having a delustered surface. The film is delustered by surface abrasion prior to fibrillation and twisting into strands. Such rope exhibits low internal friction producing its good working qualities and low abrasion to objects in which it comes in contact producing its improved hand.，下面是Rope and its manufacture专利的具体信息内容。

权利要求

1. Rope consisting of a plurality of twisted strands of fibrillated polyolefin film the surfaces of which are delustered by multiple abrasions of the form that result from drawing polyolefin film in its longitudinal direction across a surface bearing abrasive grain of about 100 to 600 mesh size.

2. A method of making a rope from polyolefin material to possess improved working qualities and hand without the use of sizing or lubricants comprising: a. extruding a film of solid polyolefin resin, b. drawing the film in the direction of its longitudinal axis at a ratio of at least 3 to 1, c. delustering the surface of the film by abrading at least one surface of the film by passing the film into tangential contact with a drum covered with coated abrasive sheets bearing abrasive grains of about 100 to 600 mesh size, said drum being mounted for rotation on an axis transverse to the axis of passage of said film, d. fibrillating the resulting dulustered film, e. twisting the fibrillated film of step ''''d'''' into a strand, and f. forming a rope from a plurality of strands resulting from step ''''e.''''

3. The method of claim 2 wherein there is a plurality of said drums each of which is rotated in a direction opposite to the direction of travel of said film and one surface of said film contacts at least one of said drums and the other surface of the film contacts at least another of said drums.

4. The method of claim 2 wherein the pressure of contact between the surface of the film and the drum is between about 1 to 10 lbs. per square inch.

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