FAQs about YKK® snaps and buttons

October 29, 2016 YKK USA

Q1. What is the best foundation for attaching snap fasteners?

A1. The best foundation is two plies of fabric plus one ply of interlining.


Q2. Why do we need an interlining sewn to fabric when attaching snap fasteners?

A2. If the interlining is not sewn to the base fabric, the fabric around the snap fasteners may tear after several ON/OFF usages. Make sure that the interlining and fabric are stitched together, especially on the back placket.


Q3. Can snap fasteners be attached to an uneven thickness?

A3. Attachment to an uneven thickness may result in snap fasteners detachment, weak ON/OFF actions, or fabric tearing. Snaps cannot be attached to significant uneven thicknesses.

Q4. How can I prevent a snap fastener from turning around after it is attached to a thin piece of fabric?

A4. A snap fastener may turn around if the fabric is too thin at the attaching point. Packing is required in this case.


Q5. How can I check to make sure that the snap fasteners attached to a piece of fabric will not come off easily?

A5. Try to pluck the snap fasteners off with your fingertip or nail. Make this practice your routine at the beginning of your day’s work.


Q6. How can I avoid fabric tearing during snap fastener attachment?

A6. Make sure you attach the snap fastener to the inside of the stitch line.


Q7. Is it okay to iron snap fasteners?

A7. Do not iron directly over snap fasteners. Ironing directly over snap fasteners may cause the metallic snaps to become scratched or deformed and the plastic snaps to become broken or distorted. Place a cloth over the snap fasteners before ironing on them.

Q8. Is it okay to apply high-impact pressure to the snap fasteners?

A8. Problems such as deformation, breakage, stiff or lost ON/OFF actions may occur if too much pressure is applied to the snap fasteners.

Q9. Is it okay to place snap fasteners in a high-temperature drying machine?

A9. Plastic snaps placed in a high temperature drying machine are less resistant to deformation, discoloration, and scratching.

Q10.What is a needle detector?

A10. A Needle Detector is a piece of equipment which is sensitive to ferromagnetic substances and which detects broken needle chips or other undesirable objects inadvertently contained in the garments. Garment accessories are made to be needle-detector proof so that they will not be confused with broken needle chips and other undesirable objects.

Q11. How should I place garments on the conveyor belt when using the Needle Detector?

A11. The garments should be positioned so that their accessories enter the gate of the needle detector one at a time.


Q12. How do I clean the Needle Detector?

A12. Keep the belt surface clean at all times. Dust or stains may cause the equipment to malfunction.

Q13. Is there a recommended pull-test machine?

A13. An SafQ Snap Tester is recommended. It is used to determine the holding or breaking strength of prong-ring attached snap fasteners on garments. It consists of an upper snap clamp, a lower fabric clamp and force gauge mounted on a stand. The snap component is gripped by the upper snap clamp and the garment is fixed to the lower fabric clamp. By turning the top flywheel, the operator can apply a specific force and the holding force or the breaking strength can be recorded. Capability can be enhanced with clamps and accessories for the testing of other snaps, jeans buttons, four hole buttons and garment accessories such as zippers, bows, applique, toggles, hooks/bars, and D-rings, among others. Contact SDL Atlas Ltd. for more details.


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