baronrope

Hemp fibre was the first   textile materia l used by man for clothing, dating back as far as 5,000 years ago. The source of hemp fibre is the hemp plant, which is diverse, and hemp fabrics are also   varied and different .   What hemp plants do you know?   Cannabis sativa Cannabis sativa L. is native to Sikkim, Bhutan, India and Central Asia. Cannabis is a dioecious plant and is usually used for different purposes depending on the differences in its vegetative characteristics. Generally speaking, male cannabis uses its fibres mainly for weaving, making hemp rope, twine, hemp paper, etc. Female cannabis is mainly used to extract its seeds to oil, used for oil or burning lamps for lighting. Cannabis fibres are fine and strong, so in addition to being used directly for weaving, they can also be used as padding for winter clothing.     Boehmeria nivea Boehmeria nivea (L.) Gaudich. is a perennial ramie herb of the genus Urticaceae, and can be harvested three tim...

Polypropylene  and polyamides (often called nylon) are two common plastics used in the manufacture of end-use parts. Plastics are made from bonded polymers and can be naturally occurring or synthetic. Designers and engineers should understand the key differences between polypropylene and  nylon  to determine which synthetic polymer is best for a given project.   Nylon trimmer line   Structure Although polypropylene and nylon are both synthetic polymers, their chemical structures differ in several important ways. These factors contribute to their differences in quality, properties and use cases. Polypropylene is an addition polymer, which means that it is the result of joining monomers together through a simple addition reaction that produces no by-products. Nylon, on the other hand, is a condensation polymer in which water molecules are expelled as the polyamide monomers are bound together. Nylon and polypropylene are very similar, but due to the differences in ...