Woven Sacks

  Normally, we measure the thickness of PP woven fabric in GSM. In addition, it also refers to "Denier", which is also a measurement indicator, so how do we convert the two? First of all, let's see what's GSM and Denier mean.  1. What is GSM of pp woven material? GSM means grams per square meter.   2. What is Denier? Denier means fiber grams per 9000m, it is a unit of measurement that is used to determine the fiber thickness of individual threads or filaments used in the creation of textiles and fabrics. Fabrics with a high denier count tend to be thick, sturdy, and durable. Fabrics with a low denier count tend to be sheer, soft, and silky. Then, let's do the calculation upon an actual case,  We take a roll of polypropylene tape (yarn) from the extruding production line, width 2.54mm, length 100m, and weight 8grams.  Denier means yarn grams per 9000m, So, Denier=8/100*9000=720D Note:- Tape(Yarn) width is not included in calculating Denier. As again it means...

MFI  Measuring   The  melt flow index  ( MFI ) is a  measure  of the ease of flow of the melt of a  thermoplastic   polymer . It is defined as the  mass  of polymer, in grams, flowing in ten minutes through a capillary of a specific diameter and length by a pressure applied via prescribed alternative gravimetric weights for alternative prescribed temperatures.Polymer processors usually correlate the value of MFI with the polymer grade that they have to choose for different processes, and most often this value is not accompanied by the units, because it is taken for granted to be g/10min. Similarly, the test conditions of MFI measurement is normally expressed in kilograms rather than any other units. The method is described in the similar standards  ASTM  D1238 and ISO 1133. Melt flow rate is an indirect measure of molecular weight, with high melt flow rate corresponding to low molecular weight. At the same time, melt flow r...

SAFE WORKING LOAD (SWL) While describing the duty condition to which the FIBC is going to get subjected to, the details given are the SWL (Safe Working Load) and SF (Safety Factor). Normally, the SF is given as 5:1 or 6:1. Safety Factor of 5:1 indicates a single use bag and 6:1 indicates multiple use bag. We will go a bit more in details about the safety factor. Safety factor of 5:1 means that the filled bag when subjected to hydraulic pressure should sustain a minimum of 5 times the SWL after  30 cycles of twice the SWL . If the bag breaks before 5 times the SWL pressure then it is not suitable for the required duty condition. This is called the peak load test. So if the SWL is 2200 lbs (1000 kgs) with SF of 5:1, the bag when subjected to the cyclic test and peak load test is considered passed only if it breaks after 11000 lbs (5000 kgs) pressure. Safety factor of 6:1 means that the filled bag when subjected to hydraulic pressure should sustain a minimum of 6 times the ...

The properties of woven polypropylene bags come from two aspects: 1. Properties of polypropylene 2. Properties of woven method Polypropylene has qualities of rot/flame/chemical resistance, and woven method means strong yet breath. Combining together with other factors, we got 9 facts of woven polypropylene bags. · Woven Polypropylene Bags are reusable. · Woven Polypropylene Bags don’t degrade when wet. · Woven Polypropylene Bags are naturally resistant to tearing. · Woven Polypropylene Bags can be printed on one side or both sides. · Woven Polypropylene Bags allow the contents to breath until air dried. · Woven Polypropylene Bags have better burst strength than plastic bags. · Woven Polypropylene Bags can be laminated as the vapor and moisture barrier. · Woven Polypropylene Bags can be partially transparent for outstanding presentation. · Woven Polypropylene Bags can be side gusseted to accommodate bulky items easily. it’s an eco-friendly fabric. It can be melted ...