{"id":197,"date":"2025-02-13T10:12:15","date_gmt":"2025-02-13T10:12:15","guid":{"rendered":"https:\/\/robline.f1-staging.work\/?page_id=197"},"modified":"2026-10-22T13:54:39","modified_gmt":"2026-10-22T13:54:39","slug":"fiber-structures-and-fiber-types","status":"publish","type":"page","link":"https:\/\/www.roblineropes.com\/en\/fiber-structures-and-fiber-types\/","title":{"rendered":"Fiber structures and fiber types"},"content":{"rendered":"

[et_pb_section fb_built=”1″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_row _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n

Fiber structures and fiber types<\/h1>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”3_5,2_5″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”3_5″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n

Overview of fiber structures<\/h2>\n

<\/h3>\n

Monofilaments<\/h3>\n

A few comparatively thick fibers (\u00f8 0.3 mm) are fed in parallel to the braiding process.<\/p>\n

Multifilaments<\/h3>\n

Many very thin fibers (0.001 mm)  are used as a bundle during the braiding process. This is the most widely used type of construction in yachting ropes.<\/p>\n

Textured fibers<\/h3>\n

The fibers are not arranged in parallel in the bundle but exhibit a more or less random type of arragement. This is why the fiber bundle has a comparatively rough surface.<\/p>\n

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Overview of fiber types<\/h2>\n

<\/h3>\n

HMPE (High Modulus Polyethylene)<\/h3>\n

HMPE (High Modulus Polyethylene) fibers are widely used in yachting due to their exceptionally high strength, low weight, and minimal stretch under load. They offer excellent resistance to moisture, UV exposure, and abrasion, making them ideal for running rigging, standing rigging, and other high-performance rope applications. Their outstanding strength-to-weight ratio enables significant weight savings while maintaining precise sail trim and efficient load transfer.<\/p>\n

Polybenzoxazole crystal polymer (PBO)<\/h3>\n

The Japan-based Toyobo Corporation produces Polybenzoxazole Crystal Polymer (PBO). PBO is a high-tech fiber that combines very high breaking loads with minimal stretch and high-temperature resistance. Its only weakness, however, is its extremely low resistance to sunlight. The fiber offers high abrasion resistance and a very smooth operation on winch drums. This characteristic makes PBO the number one choice if you want to operate extremely high-loaded ropes without noisy winch operation.<\/p>\n

Aramid = Kevlar\u00ae, Twaron\u00ae or Technora\u00ae<\/h3>\n

Japan-based Teijin produces Twaron\u00ae and Technora\u00ae fibers, while U.S.-based DuPont produces Kevlar\u00ae. Each of these products is a para-aramid fiber made of co-polymers. In the yachting ropes segment, this fiber is highly appreciated mainly because it exhibits zero stretch, high breaking loads, and extremely high-temperature resistance. This makes it ideal for use as a cover fiber for winches. However, it is sensitive to sunlight.<\/p>\n

Polyester (PET or PES)<\/h3>\n

Polyester offers a great number of chemical and physical advantages. It boasts relatively good breaking loads and low stretch as well as salt-water resistance, good abrasion resistance in both dry and wet conditions, and good resistance to sunlight. In view of this large number of benefits, PES is used frequently for the production of yachting ropes. In the cruising segment, it serves as material for both cores and covers of halyards, sheets, and mooring lines. Due to the high density of this material and the fact that it sinks after time it finds its application as an anchor line. In medium-tech applications, it is often used as a cover material in order to protect core materials that are sensitive to UV light.<\/p>\n

Polyamide (PA)<\/h3>\n

Apart from a high breaking load and stretch, Polyamide is very abrasion resistant, a fact that is even better in wet than in dry conditions. This fiber absorbs up to 7% water, which makes it applicable as material for mooring or anchor lines. However, when kept in contact with moisture for too long, Polyamide can become stiff. Another downside compared to Polyester is its lower UV resistance.<\/p>\n

Polypropylene (PP) = XLF<\/h3>\n

PP is extremely lightweight and even buoyant. It exhibits sufficient abrasion and temperature resistance. PP is used for simple applications in the yachting rope segment. Its relatively high stretchability makes Polypropylene a popular material for allround ropes, towing lines, and simple mooring lines.<\/p>\n

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Product overview<\/h3>\n<\/header>\n<\/div>\n
\n\n\n\n\n\n\n\n\n\n\n\n
Rope<\/th>\nMaterial
(mm)<\/th>\n		Strength
(daN\/mm2<\/sup>)<\/th>\n		Specific
gravity
(kg\/cm3<\/sup>)<\/th>\n		Water
absorption
(%)<\/th>\n		Resistance
to sunlight<\/th>\n		Elongation
(%)<\/th>\n		Abrasion
resistance<\/th>\n		Creep<\/th>\nMelting point (C\u00b0)<\/th>\n<\/tr>\n<\/thead>\n
Tentex\u00ae<\/sup> <\/span>\/ Spectra\u00ae<\/sup><\/td>\nUHMWPE<\/td>\n345<\/td>\n0,97<\/td>\n0<\/td>\ngood<\/td>\n3,5<\/td>\nvery good<\/td>\nat high loads<\/td>\n140<\/td>\n<\/tr>\n
Liquid Crystal Polymer<\/td>\nLCP<\/td>\n280<\/td>\n1,41<\/td>\n0<\/td>\npoor<\/td>\n3,5<\/td>\ngood<\/td>\nnot measurable<\/td>\n330<\/td>\n<\/tr>\n
PBO<\/td>\nPBO<\/td>\n574<\/td>\n1,54<\/td>\n0,5 – 2,0<\/td>\nlow<\/td>\n2,5-3,5<\/td>\nvery good<\/td>\nnearly not measurable<\/td>\n–<\/td>\n<\/tr>\n
Aramid \/ Technora\u00ae<\/sup><\/td>\nAramide<\/td>\n250<\/td>\n1,45<\/td>\n3,0<\/td>\npoor<\/td>\n3,5<\/td>\nvery good<\/td>\nnearly not measurable<\/td>\n450<\/td>\n<\/tr>\n
Polyester (PET)<\/td>\nPET<\/td>\n110<\/td>\n1,40<\/td>\n0,5<\/td>\nvery good<\/td>\n10 – 16<\/td>\nvery good<\/td>\nnearly not measurable<\/td>\n250<\/td>\n<\/tr>\n
Polyamide (PA)<\/td>\nPA6 \/ PA66<\/td>\n81<\/td>\n1,14<\/td>\n3,0<\/td>\naverage<\/td>\n20 – 25<\/td>\nvery good<\/td>\nlow, good<\/td>\n250<\/td>\n<\/tr>\n
Polypropylene (PP) = XLF<\/td>\nXLF Multifilament<\/td>\n56<\/td>\n0,91<\/td>\n0<\/td>\ngood<\/td>\n20 – 25<\/td>\nsufficient<\/td>\nat high loads<\/td>\n160<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

Fiber structures and fiber typesOverview of fiber structures Monofilaments A few comparatively thick fibers (\u00f8 0.3 mm) are fed in parallel to the braiding process. Multifilaments Many very thin fibers (0.001 mm)  are used as a bundle during the braiding process. This is the most widely used type of construction in yachting ropes. Textured fibers […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-197","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.roblineropes.com\/en\/wp-json\/wp\/v2\/pages\/197","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.roblineropes.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.roblineropes.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.roblineropes.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.roblineropes.com\/en\/wp-json\/wp\/v2\/comments?post=197"}],"version-history":[{"count":8,"href":"https:\/\/www.roblineropes.com\/en\/wp-json\/wp\/v2\/pages\/197\/revisions"}],"predecessor-version":[{"id":2637,"href":"https:\/\/www.roblineropes.com\/en\/wp-json\/wp\/v2\/pages\/197\/revisions\/2637"}],"wp:attachment":[{"href":"https:\/\/www.roblineropes.com\/en\/wp-json\/wp\/v2\/media?parent=197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}