04-02-2021 дата публикации
Номер: US20210032801A1
Принадлежит:
The present invention is directed to a method of increasing the brightness of non-wood fibers and nonwoven fabric fabrics produced by the method. In one aspect, the method includes forming a mixture of non-wood fibers and exposing the mixture to a brightening agent to produce brightened fibers. The brightening agent is oxygen gas, peracetic acid, a peroxide compound, or a combination thereof. The brightened fibers have a brightness greater than the fibers of the mixture before exposure as measured by MacBeth UV-C standard. 1. An article , comprising:brightened bast fibers with a mean length of about 5 to about 95 millimeters (mm) and a brightness greater than or equal to 80 as measured by a TAPPI standard;wherein the article is a yarn, a thread, a rope, a cord, or a sliver.2. The article of claim 1 , wherein the brightened bast fibers are flax fibers claim 1 , hemp fibers claim 1 , jute fibers claim 1 , ramie fibers claim 1 , nettle fibers claim 1 , Spanish broom fibers claim 1 , kenaf plant fibers claim 1 , or any combination thereof.3. The article of claim 1 , further comprising a lubricant claim 1 , a finish claim 1 , an antistatic agent claim 1 , or a combination thereof.4. The article of claim 1 , wherein the article further comprises synthetic fibers claim 1 , polymeric fibers claim 1 , thermoplastic fibers claim 1 , staple fibers claim 1 , regenerated cellulose fibers claim 1 , cotton fibers claim 1 , wood pulp fibers claim 1 , or a combination thereof.5. A fabric claim 1 , comprising:brightened bast fibers with a mean length of about 5 to about 95 millimeters (mm) a brightness greater than or equal to 80 as measured by a TAPPI standard;wherein the fabric is a woven fabric or a knit fabric.6. The fabric of claim 6 , wherein the fabric comprises a yarn claim 6 , a thread claim 6 , a rope claim 6 , or a combination thereof.7. The fabric of claim 6 , wherein the brightened bast fibers are flax fibers claim 6 , hemp fibers claim 6 , jute fibers claim 6 , ramie ...
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