{"id":8889,"date":"2026-11-07T15:00:00","date_gmt":"2026-11-07T07:00:00","guid":{"rendered":"https:\/\/hcsitong.com\/?p=8889"},"modified":"2026-11-06T17:01:33","modified_gmt":"2026-11-06T09:01:33","slug":"pp-woven-bag-specifications-gsm-denier-micron-mesh","status":"publish","type":"post","link":"https:\/\/hcsitong.com\/fr\/pp-woven-bag-specifications-gsm-denier-micron-mesh\/","title":{"rendered":"PP Woven Bag Specifications Explained: GSM, Denier, Micron & Mesh"},"content":{"rendered":"

When sourcing PP woven bags, buyers often compare quotations based on fabric weight, tape denier, coating thickness and weave density. These specifications affect material consumption, bag construction and suitability for different applications, but no single figure tells the whole story.<\/p>\n\n\n\n

Understanding how GSM, denier, micron and mesh relate to one another helps importers evaluate fabric quality, identify differences between suppliers and avoid paying for specifications that do not match their actual packaging requirements. This guide explains what each parameter means and what to confirm before placing an order.<\/p>\n\n\n\n

Why PP Woven Bag Specifications Matter<\/h2>\n\n\n\n

Two PP woven bags with the same GSM may have different tensile and tear performance because fabric weight alone does not describe the complete construction. Tape denier, tape width, weave density, resin quality and manufacturing conditions all contribute to the finished fabric’s properties.<\/p>\n\n\n\n

For importers sourcing rice, fertilizer, animal feed or industrial packaging, comparing the complete specification is more useful than choosing a supplier based on GSM alone. The following parameters provide a practical starting point for evaluating fabric rolls and finished bags. For the broader picture of bag types and sourcing, see our woven polypropylene bags buyer’s guide<\/a>, and for fabric rolls specifically, our PP woven fabric product page<\/a>.<\/p>\n\n\n\n

GSM \u2014 Grams per Square Metre<\/h2>\n\n\n\n

GSM<\/strong> is the mass of the woven fabric per square metre. It is an important indicator of material consumption and helps buyers compare fabric constructions, but it does not directly determine tensile or tear strength.<\/p>\n\n\n\n

The required GSM depends on bag size, filling weight, fabric construction, printing or lamination requirements and the conditions under which the bag will be handled.<\/p>\n\n\n\n

Specification consideration<\/th>What buyers should check<\/th><\/tr><\/thead>
Lightweight PP woven fabric<\/td>Suitable GSM for smaller packs and applications with lower strength requirements<\/td><\/tr>
Standard PP woven sacks<\/td>Fabric weight matched to the intended filling weight and handling conditions<\/td><\/tr>
Heavy-duty PP woven fabric<\/td>Higher material weight where additional fabric strength or durability is required<\/td><\/tr>
Coated or laminated fabric<\/td>Whether the stated GSM refers to base fabric or the combined fabric and coating weight<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

For accurate quotation comparisons, always confirm whether GSM refers to the uncoated base fabric or the finished laminated fabric. Suppliers should also clarify the measurement tolerance.<\/p>\n\n\n\n

Denier \u2014 Tape Yarn Linear Mass<\/h2>\n\n\n\n

Denier<\/strong> is a unit of linear density used to describe the mass of a fibre or yarn per 9,000 metres. One denier equals one gram per 9,000 metres. For example, 900-denier PP tape has a mass of 900 grams per 9,000 metres.<\/p>\n\n\n\n

In PP woven bags, denier helps describe the amount of material used in individual tapes. However, a higher denier does not automatically guarantee greater tensile strength. Tape width, thickness, resin properties and stretching conditions also influence performance.<\/p>\n\n\n\n

When comparing quotations, buyers should confirm warp and weft denier separately, together with tape width and other relevant fabric specifications. This provides a clearer picture of the actual fabric construction than denier alone.<\/p>\n\n\n\n

\"White
Denier describes the linear mass of PP tape yarn and helps buyers compare tape specifications.<\/figcaption><\/figure>\n\n\n\n

Micron \u2014 Thickness<\/h2>\n\n\n\n

Micron<\/strong> (\u03bcm) is a unit used to measure material thickness. In PP woven bag specifications, it may refer to the thickness of a PP tape, a PE coating layer or a BOPP film, depending on the product construction.<\/p>\n\n\n\n

For laminated PP woven bags, buyers should clarify whether the quoted micron value refers to the BOPP film or the coating layer. These are different components and should not be treated as interchangeable specifications.<\/p>\n\n\n\n

Coating and film thickness affect material consumption, surface properties and moisture protection. The appropriate specification depends on the product being packed, the required packaging performance and the intended printing method.<\/p>\n\n\n\n

Mesh \u2014 Weave Density<\/h2>\n\n\n\n

Engrener<\/strong>, also referred to as weave density, describes the number of tapes or yarns counted over a specified length in the warp and weft directions of woven fabric.<\/p>\n\n\n\n

For example, a specification such as 10 \u00d7 10 should always be accompanied by its measurement unit, such as tapes per inch or per centimetre. Buyers should also confirm whether the two figures represent warp and weft counts respectively.<\/p>\n\n\n\n

Weave density affects fabric structure, openings between tapes and material consumption. A tighter weave may help reduce the passage of fine particles, but sift resistance also depends on tape width, coating, liner construction and the characteristics of the packed material.<\/p>\n\n\n\n

For consistent supplier comparisons, specify the counting unit and measurement method rather than relying on a mesh number alone. ASTM D3775 and ISO 7211-2 provide relevant references for determining thread density in woven fabrics, although the applicable testing method should be confirmed for the specific PP fabric.<\/p>\n\n\n\n

\"Comparison
Different weave densities create different fabric openings and affect material consumption.<\/figcaption><\/figure>\n\n\n\n

Reading the Four Specifications Together<\/h2>\n\n\n\n

No single specification can fully describe a PP woven bag. GSM, denier, micron and mesh provide different information about the fabric and its construction. When reviewing quotations, buyers should consider them together.<\/p>\n\n\n\n

Param\u00e8tre<\/th>What it describes<\/th>Que confirmer<\/th><\/tr><\/thead>
GSM<\/td>Fabric weight per square metre<\/td>Base fabric GSM or finished laminated GSM<\/td><\/tr>
Denier<\/td>Linear mass of PP tape<\/td>Warp and weft denier, tape width<\/td><\/tr>
Micron<\/td>Material or film thickness<\/td>Whether it refers to PP tape, PE coating or BOPP film<\/td><\/tr>
Engrener<\/td>Densit\u00e9 de tissage<\/td>Warp and weft counts, measurement unit<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

These parameters should be considered alongside bag dimensions, filling weight, seam construction, printing requirements and handling conditions. A complete specification makes it easier to identify differences between suppliers and reduces the risk of receiving bags that do not match the intended application.<\/p>\n\n\n\n

\"Quality
Fabric weight and tensile testing help verify different aspects of PP woven fabric quality.<\/figcaption><\/figure>\n\n\n\n

Choosing Specifications by Material<\/h2>\n\n\n\n

The right PP woven bag specification depends on the product being packed, filling weight, storage conditions and handling method. Buyers should evaluate the complete construction rather than selecting GSM or denier based on the product category alone.<\/p>\n\n\n\n