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Wednesday, November 17, 2010

Slider tensile strength test

Slider tensile strength test
The Body to Puller Strength is measured by this test. The complete slider is mounted on a special jig and load is applied to the Puller while keeping the Body fixed at 90 degrees. The resistance of the slider is measured till failure and is recorded. Tensile Tester velocity used in the above tests varies between 100~300 mm / min and the standard Clamp width used is 25mm.


To determine the Zipper Strength the Zipper Chain in closed position is clamped
in-between specially designed Jaws of 25 mm width and pulled at a fixed speed
at 90 degree angle to the chain interlocked direction.
The resistance is measured in till failur


There are various methods to evaluate Zipper & Slider quality. The procedures in various quality
standards worldwide are more or less similar and are documented well under ASTM, ISO, BIS, JIS,
DIN, ISI and other well known International Standards.
Zipper & Slider strengths are checked as a routine inspection, For this the method laid out in
JIS-S3015 is used. The same standard is used by the YKK also, the world's leading Zipper manufacturer.
The basic strength can be determined based on the following inspection methods, from which all round
strength appropriate for respective uses can be judged.

Sunday, November 7, 2010

Judge 4 point inspection fabrics

Acceptability of Roll/Shipment – Fabric shipments exceeding the following point totals are considered to be second quality and not acceptable.
• Warp knits – average of 20 points per 100 linear yards
• Synthetic/synthetic blends weft knits – average of 20 points per 100 linear yards
• Synthetic wovens – average of 20 points per 100 linear yards
• Twills, cottons, linens – average of 25 points per 100 linear yards
No individual roll should be considered first quality if the point total exceeds 30 points per 100 linear yards.

Method 4 point fabric inspection

Inspection Method – the face side of the fabric should always be inspected. Fabric mill and garment maker should check for side-center-side shading, shading from roll to roll and shading from beginning to end of roll. A proper light box (in Color Manual should be near the vincinity of the inspection frame to ensure proper color evaluation during inspection. Defects not visible on the face of the fabric are not counted unless there has been a decision/agreement to do so between fabric supplier and garment maker . Defects outside the cuttable width, on the selvage, should not be counted.

4point inspection fabrics

Roll Size – Minimum and maximum roll size and the acceptable number of joins will be agreed to by fabric supplier and garment maker before the beginning of each season. Fabric supplier and garment maker should also agree whether fabric edges are to be trimmed.

Inspection fabric 4 point

Inspection Sample Size – Fabric mills should perform 100% inspection of all fabrics during the put-up grading each roll for defects. Garment makers should inspect a minimum of 10% of each fabric shipment received. Tightened and loosened inspection should be employed by T1 as appropriate so any problem fabrics receive an inspection of greater than 10% and those better performing fabrics receive less inspection.

Fabric inspection

Inspection Lighting – Examination and grading is to be performed with overhead direct lighting to determine faults on the surface of the fabric. The overhead direct lighting should be mounted parallel to the viewing surface. The frame should be tilted so that the fabric passes at an angle of 45 – 60 degrees to the horizontal. Overhead CWF lighting is recommended and should provide an illumination level of a minimum of 100 foot candles (1075 lux) on the surface of the fabric.

Fabric inspection

Inspection Speed – The fabric should be inspected at a speed which is compatible with the inspector’s ability and the type of fabric being audited. The speed should not exceed 25 (twenty-five) yards per minute.

Wool textile

Wool is the textile fiber obtained from the hair of sheep and certain other animals, including cashmere from goats, mohair from goats, vicuña, alpaca, and camel from animals in the camel family, and angora from rabbits.
Wool has several qualities that distinguish it from hair or fur: it is crimped, it is elastic, and it grows in staples (clusters)

Cashmere wool fiber

Cashmere wool, usually simply known as cashmere, is a fiber obtained from Cashmere and other goats. The word cashmere derives from an old spelling of Kashmir.
Cashmere wool is fine in texture, and it is also strong, light, and soft. When it is made into garments, they are extremely warm to wear.

Steel wool

Steel wool, also known as wire wool, is a bundle of strands of very fine soft steel filaments, used in finishing and repairing work to polish wood or metal objects, as well as for household cleaning.
Steel wool is made from low-carbon steel (low enough to be close to plain iron). It is not made by drawing "steel wool wire" through a tapered die, but rather by a process more like broaching where a heavy steel wire is pulled through a toothed die that removes a thin wire shaving.

Mineral wool fiber

Mineral wool, mineral fibres or man-made mineral fibres are fibres made from natural or synthetic minerals or metal oxides. The latter term is generally used to refer solely to synthetic materials including fibreglass, ceramic fibres and rock or stone wool. Industrial applications of mineral wool include thermal insulation, filtration, soundproofing, and germination of seedlings.