A variety of buttons can be used in the changing styles of clothing. Designers must design according to styles and refer to the front midline position, the highest position and the waist position as much as possible.
The upper eye position is the most important thing in a buttonhole. It should be marked on the horizontal line with the base point of the refutation line (the refline line passes the X point).
The button on the waist is also very important. It is often located above the waistline and below the waistline. In the connected jacket, there is only one buckle (connected double button), it is always located 2cm above the waistline to prevent the archer from arching. Most of the current styles use middle buttons, or the lowest button, and in traditional styles, narrow button suits often use high button positions. Two buckles are more convenient, and the buttonhole spacing depends on the style. Generally, the buttonhole spacing is at least 6cm (sometimes less) and at most 1.5cm (usually 9~10cm).
In a single-breasted design, the distance between the button and buttonhole to the corresponding edge is theoretically equal or substantially equal. This is particularly suitable for narrow threshold (2 ~ 3cm) styles, because here, the button means that it is on the front midline. In fact, the buttonhole of the suit is usually very close to the spigot line, about 1~2cm, and the buttons are often sewn to the inner side of the rim (preferably to the fold door), and sometimes they are also moved inwards or outwards. To adjust the tightness of the garment. In this way, we do not have to move the distance of the front midline (such as the high-neutral suit jacket).
In double-breasted styles, the distance between the double-row buttons from the front midline is mainly determined by the width of the threshold. This style usually has a wider barter, the New York position is lower or higher than the waist line. Double-breasted from the front midline distance, usually 6 ~ 8cm (button spacing 10 ~ 11cm); for low-headed, low-neutral traditional style, the distance is usually 9cm, or even 10cm (with a button spacing of 14 ~15cm).
When designing buttons and grommets for double-breasted suit jackets, the buttonholes on the placket are usually marked 1-2cm away from the flap edge. Then, for sewing convenience, the distance from the front midline Distance, determine the second (neighboring) New Line (of course, no buttonholes in this line). On the bottom cymbal, the single-breasted eye is usually closer to the mouth than the inner button, so that the bottom edge of the lower door is held in place.
Rubber Damper, also known as Shock Absorber, Isolator, and NBR grommet, NBR is a unsaturated rubber copolymer with polar unsaturated carbon chains, which is copolymerized by propenenitrile and butadiene, according to propenenitrile content from low to high, the higher the resistance to oils but the lower the resistance to cold. Oil resistance is the greatest advantage of NBR elastomer so it has excellent resistance to petroleum base oils and non-polar solvents but poor resistance to polar oils and polar solvents.
Nitrile rubber (NBR, Buna-N) grommet provides excellent resistance to petroleum oils as well as mineral and vegetable oil. Nitrile rubber also offers strong resistance to heat aging - often a key advantage over natural rubber.
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