Any piece of clothing or accessory that has a zipper on it, will be valuable only till its zipper functions properly. A stuck zipper or a broken pull tab only spoils the entire apparel or accessory. It is extremely critical to recognise that zipper problems afflicting the apparel or accessory can point out negligence on the part of the manufacturer. Also, the client will definitely make complaints about the whole garment even if the problem is caused by the zipper alone. Thus, it is imperative to use zippers that have been put to stringent tests.
In fact, there are various tests to evaluate the utility and quality of zippers. As these tests are interconnected, more than often, a zipper goes through multiple tests for a comprehensive evaluation.
At SBS, it is crucial that each and every zipper is superior in quality, and demonstrates the highest standards followed by the organisation.
Here's a peek into quality control measures of sbs zippers.
1. Evaluating the size
Yes, there are different sizes, and it is essential to know which size will be perfect for the client. An error in size can render an entire garment worthless. SBS Zipper ensures that each zipper manufactured is flawless in all respect. The size of a zipper has to be accurate. Though, according to acceptable quality standards sizes that are approximately close to the required size range are considered good enough, SBS ensures that it provides the exact size that the client orders.
2. Assessing the strength
Consistent quality is a must to ensure that each zipper is strong enough to qualify as a quality product. Zippers of regular garments are different from the heavy duty zippers used in bags, jackets, etc. with regard to strength. It is, however, a pre-requisite of a good zipper to make it through strength test. At SBS a tensile testing machine is used to examine strength of a zipper. As part of strength test, a zipper tooth is attached to a hook and with a machine's help force is applied to the tooth till it breaks. A gauge then calculates the breaking point. Apart from the teeth, entire zipper also goes through similar assessment. A testing machine is connected to the zipper on both sides and force is applied till it tears apart. SBS Zipper also ensures that heavy duty zippers have higher strength value than the regular zippers.
3. Testing flatness
A gauge is placed at a set height through which zipper is passed; a flawless zipper will not touch any part of the gauge whereas a defective zipper will touch the gauge. An ideal zipper must also not curve when it is properly positioned on a straight edge. Considering the highest quality standard that SBS follows, the defective pieces are discarded.
4. Effortless functioning
Regular zippers used in garments need a low force to zip as against the heavy duty zippers hat need a high force. SBS Zipper makes certain that an average strength person must be able to easily zip the zipper without damaging the fabric. A tensile testing machine evaluates the force necessary to zip a zipper up and down. A good quality zipper will zip up and down with ease.
5. Withstanding machine wash
A superior quality zipper must withstand washing machine wash. SBS Zipper tests zippers by washing them in machine with hot water and other abrasive conditions, like using bleach. A zipper must not shrink and should also have a colourfast material so that surrounding fabric is not spoiled. In order to ensure that zipper is free of any shrinkage, length of zipper is tested after several washes. SBS controls light weight zipper shrinkage between 1 per cent and 4 per cent and always tries to ensure that there is no shrinkage with regard to heavy zippers.