The principle of Velcro hook-and-loop fasteners

Velcro hook-and-loop fasteners are used to attach and detach pockets on outerwear and bags. They can be reused multiple times and are easy to attach. Do you know how Velcro works? This article will introduce the origin of the name and the principle behind how it attaches one side to the other.

What is a Velcro hook-and-loop fastener?


Velcro hook-and-loop fasteners are commonly called MAGIC TAPE. MAGIC TAPE is a trademark of Kuraray Co., Ltd. and has been manufactured and sold since 1960. Two different types of sheets with different components can be paired, and each side can be made to adhere to the other by aligning the two sides. This item can also be used by utilizing its sides and can function as part of a garment. For this reason, it is often used in pockets and zippers of clothing.

Velcro hook-and-loop fasteners are not only used for general clothing, but are also used in combat uniforms, space suits, and special suits. Velcro hook-and-loop fasteners are not easily affected by sweat or dust, and there is no danger of the knobs being damaged as is the case with ordinary fasteners. It is said that on the Apollo spacecraft, in addition to being used for space suits, Velcro hook-and-loop fasteners were also used to fix items inside the ship to the walls.

Velcro hook-and-loop fasteners were created and certified in 1955. George de Mestral from Switzerland began his research after seeing wild burdock berries sticking to clothing while climbing the Alps. Velcro S.A. was then established in Switzerland and began production under the name of Velcro. Incidentally, Velcro is also a trademark, and is currently sold as a product of the U.S.-based Velcro USA, Inc.

Hook-and-loop fasteners are made of synthetic fibers such as nylon and polyester, etc. Therefore, they are weak against heat, and when they are ironed, they will be deformed and the adhesive strength will be weakened, so keep hot items away from them. In addition, due to the structure of Velcro hook-and-loop fasteners, lint and other debris can easily adhere to them, regular maintenance is required to maintain the adhesive strength. For example, when washing, you can prevent lint from sticking by fastening the Velcro hook-and-loop fasteners and putting them in a laundry net. Incidentally, if the hooks or loops are damaged after long-term use, you will need to replace them with a new one, so it is a good idea to be prepared.

About the sticking principle and hook/loop

Velcro hook-and-loop fasteners can stick together because one side has fine hooks (hooks) and the other side has fine loops (loops) that hook and unhook from each other. The hooks and loops have different names: the hooks, which are prickly when touching, are also known as side A or male, while the loops, which are fluffy, are known as side B or female.

Furthermore, Velcro hook-and-loop fasteners use various structures. For example, Free Magic has both Velcro hook-and-loop functions on one surface, but the hooks are lower than the loops to prevent fabrics from damaging each other and lint and debris from sticking. On the other hand, MAGITOUCH and MAGIC HARD have mushroom-shaped hooks that do not come off easily when snagged.

There are also those whose hooks are shaped like arrowheads and bind strongly, and those whose hooks are mushroom-shaped on both sides, and both heads are pressed together to engage.

When selecting Velcro hook-and-loop fasteners with different surface structures, you can also choose by strength. When dividing them into categories such as hard, soft, and ultra-soft, it is important to compare them by how high the adhesive strength is. There are different types of Velcro hook-and-loop fasteners, so you should first distinguish between them based on where you will use them.

By the way, Velcro hook-and-loop fasteners are also used in a wide range of fields, and many of you may have probably used them several times in your daily life. Velcro hook-and-loop fasteners are not limited to those with hooks on one side and loops on the other, which are commonly used, but there are also those with a structure that increases strength, so it is recommended that you use different types depending on the purpose. Velcro hook-and-loop fasteners can be used for clothing, taped to hold things in place, or used for tools such as shoes and bags, etc.