Standard Woven Bag Specifications:30cm-----75cmWide, available in any length, suitable for standard printing, and color printing.
Application Scope
Vegetables and other agricultural products packaging
Subsequently replaced paper-based cement packaging bags.
Due to product resources and pricing issues, our country has6010 billion woven bags for cement packaging, accounting for bulk cement packaging85%Above, with the development and application of flexible container bags, plastic woven container bags are widely used for marine transportation, packaging of agricultural and industrial products. In agricultural product packaging, plastic woven bags are extensively used for packaging aquatic products, poultry feed, covering materials for farms, sunshade, windbreak, hail protection sheds, and other materials for crop planting. Common products include feed woven bags, chemical woven bags, putty powder woven bags, urea woven bags, vegetable mesh bags, fruit mesh bags, etc.
Food Packaging
Rice, flour, and other food packaging is increasingly being transitioned to woven sack packaging. Common types of woven sacks include: rice woven sacks, flour woven sacks, corn woven sacks, and other woven sacks.
Geotechnical Engineering
From80Since the development of geotextiles, the application fields of plastic woven materials have been expanded, widely used in small water conservancy, power, road, railway, seaport, mining construction, and military engineering projects. In these projects, geosynthetic materials serve functions such as filtration, drainage, reinforcement, isolation, and waterproofing, and plastic geotextile is one type of synthetic geosynthetic material.
Travel Transportation
Temporary tents and sunshades in the tourism industry, as well as various travel bags and suitcases, utilize plastic woven materials. Various tarpaulins are widely used as covering materials for transportation and storage, replacing the easily moldy and cumbersome cotton woven tarps. Construction fences and netting also commonly employ plastic woven materials. Common types include logistics bags, logistics packaging bags, cargo bags, and cargo packaging bags.
Daily Necessities
Most workers, farmers, cargo handlers, and market-goers use plastic woven products, which are everywhere in stores, warehouses, and homes. The padding material for synthetic carpet is also replaced by plastic woven materials, such as shopping bags, supermarket bags, eco-friendly supermarket bags; as well as cargo bags for logistics transportation and logistics woven bags.
6Flood control supplies
Burlap bags are indispensable for flood relief efforts and the construction of dams, riverbanks, railways, and highways. This includes flood control bags, drought-resistant bags, and anti-flood bags.
National Standards
TAGS:National Standard for Plastic Woven BagsGB/T8946-2013
Date:2008-08-22
This standard specifies plastic packaging, Transportation, Storage Requirements. This standard applies to polypropylene, Polyethylene resin is the main raw material. After extrusion, Stretched into flat filaments. Further weaving, Plastic woven bags made for packaging powdery or granular solid materials and flexible items (hereinafter referred to as "bags") 。
Reference Standard
The provisions contained in the following standards: Provisions constituting this standard by reference in this standard. At the time of this standard's publication, All displayed versions are valid. All standards will be revised. Parties using this standard should discuss the use of the following standards***Possibilities of the new version.
GB/T 1039-92 Methods for Testing Mechanical Properties of Plastics – General Principles
GB/T 1040-92 Plastic Tensile Property Testing Method
GB/T 2828-87 Batch inspection counting sampling procedure and sampling table (for inspection of continuous batches)
GB 2918-82 Standard Environment for Plastic Sample Condition Adjustment and Testing
GB/T 4857. 5-92 Packaging | Transport Packaging Units | Drop Test Method
GB/T 5009. 60-1996 Analysis Method for Sanitary Standards of Molding Products Made of Polyethylene, Polystyrene, and Polypropylene for Food Packaging
GB 9687-88 Sanitary Standards for Polyethylene Molding Used in Food Packaging
GB 9688-88 Sanitary Standards for Polypropylene Molding Products Used in Food Packaging
Product Categories
Variety
By primary material composition, divided into polypropylene bags, Polyethylene bags.
By sewing method, divided into bottom pockets, Seamless Bottom Pouch
Testing Method
Tensile Load
Test Conditions
Please provide the Chinese content you would like translated into American English.GB/T 1039 Regulations are in place. Samples are tested at temperatures23℃±2° C, Moisture Level Adjustment4hAnd tests were conducted under these conditions.
Test equipment should comply withGB/T1040-1992 Chapter6Section regarding equipment specifications: Fixture spacing is200mmThe empty vehicle descends at a speed of200mm/min±20mm/min。
Method of Sampling
With the folded surface of the sewing roll as the sampling surface, take the warp and weft directions from each bag. Seaming direction Two pieces of fabric samples for each seam bottom. Long300mmApprox. width60mm, and further refined to50mmPlease provide the Chinese content you would like to have translated into American English.***Leave the next thread if it's more than half a thread longer. The seam threads on both sides of the sample should be left longer, with three knots tied on each side.
Record the tensile load of the sample and take the arithmetic mean.
If the sample breaks or slips in the fixture during testing, affecting accuracy, a new sample should be used to repeat the test.
Thermal resistance
Remove two specimens each from the warp and weft directions from the bag, length300mm, width20mm。
Overlap the surfaces and apply on top9.8 NThe load, into80℃ oven1hRemove the two overlapping specimens immediately after extraction and inspect the surfaces for any abnormal conditions such as sticking or melting marks.
Drop resistance
Test environment is at room temperature and humidity.
The test site is a level concrete surface.
Filling coefficient0.80～0.85。
Test quality and material selection
TAType bags20kgPolypropylene, polyethylene resins, or materials of equivalent density.
ABagged25kgPolypropylene, polyethylene resins, or materials of equivalent density.
BBagged type40kgUrea or material with equivalent density.
CBagged style50kgUrea or material of equivalent density.
Test Sequence
******Vertical - Horizontal - Lateral
Paragraph 2: Horizontal—Lateral—Longitudinal
Section 3: Lateral—Vertical—Horizontal
Place the sample on1.2mThe free fall height, as specified.5.7.5Conduct three drop tests in the specified order to inspect for any bag破裂 and packaging leakage.
Sanitary Performance
As perGB/T5009.60Regulations are in effect.
Inspection Rules
Batching
Products of the same model and specification are grouped as a batch, with no batch exceeding1510,000.
Sample
Bag appearance and deviation qualification determinationGB/T2828A standard sampling plan as specified(See Table5)Each woven sack is a sample unit.
|
Bulk Range |
Sample Size |
Qualified Assessment CountAc |
Number of不合格determinationsRc |
|
501—1200 |
32 |
3 |
6 |
|
1201—3200 |
50 |
7 |
8 |
|
3201—10000 |
80 |
10 |
11 |
|
10001—35000 |
125 |
14 |
15 |
|
35001—150000 |
120 |
21 |
22 |
Tensile load: random sampling per batch5Thread,Among them2Item for spare,3Product lines5.5.3Sample measurement.
Other inspection items as per Item No.5The chapter stipulates random sampling; the number of samples should meet the testing requirements for the necessary items.
Inspection Category
The factory inspection items include tensile load.
Type Testing
The type testing items include all items in the technical requirements. Generally, a type test is conducted once a year. A type test should be carried out under any of the following conditions:
a) Trial and定型qualification for new or existing products undergoing factory conversion production.
b) After formal production, any significant changes to the structure, materials, or process may affect product performance.
c) Upon resuming production after a long-term halt.
d) When the factory inspection results show significant differences from the last type inspection;
e) The national quality supervision authority has proposed requirements for type testing.
6.4Evaluation Rules
Sample Unit Quality Assessment
The appearance and deviation of the bags are inspected according to requirements. If all items pass the inspection, the sample unit is deemed合格.
Quality Determination of Approved Batch
Bag appearance and deviation qualification determinationGB/T2828Regulations are in place, expressing batch quality in terms of the number of non-conforming products per hundred units, with a general inspection level ofICompliant quality levelAQL) For6.5Please refer to the specific regulations in the table.5。
If there are any不合格 items in the tensile strength test, the original batch should be resampled at double the amount to retest the不合格 items. If the retest results are all合格.,The batch is deemed qualified.
Heat Resistance Test
If the heat resistance test fails, the type test is considered不合格.
Drop Test
If the drop test is not passed, the type test is considered to be non-compliant.
Sanitary Performance
If the hygiene performance indicators are not up to standard, the type examination is deemed不合格.
Branding, Packaging, Transportation, Storage
Brand
The product packaging should include the manufacturer's name, product name, specifications, quantity, standard number, trademark, and manufacturing date. Special requirements shall be decided through mutual consultation.
Packaging
Bag packaging should be sturdy, flat, and suitable for transportation.
The number of items per package is subject to negotiation between both parties.
Each package should contain a product certificate of conformity.
Transportation
The bags must be handled gently during transportation, avoiding sun exposure and rain, to ensure the packaging remains intact.
Storage
Bags should be stored in a cool, clean indoor area, with a storage period of no more than 18 months from the date of manufacture.
Woven bags, woven bag pockets, snake skin bags, Sichuan woven bags, fertilizer packaging bags, color-printed woven bags
