Catalog Inspection items, methods and standard product classification Dimensions and tolerances and quality deviations Appearance quality requirements Stitching breaking force inspection rules Judgment rule marks, packaging, transportation, storage signs Packaging, transportation and storage
Test items, methods and standards
GB10806-89 regulates the product classification, technical requirements, testing methods, inspection rules and signs, packaging, transportation and storage of plastic mesh bags.
This standard applies to mesh bags made of polypropylene or polyethylene as the main raw material, extruded, stretched into flat yarn, and then woven. This bag can be used for the packaging of vegetables, fruits and other items, but it is not suitable for Packed in hard and lumpy block material.
Product Categories
According to the weaving method, it is divided into two categories: plain woven mesh bags and warp knitted mesh bags.
Plain weave mesh bags are divided into large mesh, medium mesh, and small mesh according to different latitude and longitude density.
The warp-knitted mesh bags are divided into large nets and small nets according to different warp and weft density.
Specifications: The specifications of the mesh bag [1] are indicated by the effective size L * B, and there is no size series.
Dimensions and tolerances and quality deviations
Tolerance range: length +2 to _1.5cm, width: +1.5 to -1.5cm.
The average quality deviation of each bag is ± 6%.
Appearance quality requirements
Color: There should be no obvious difference in the same batch of products.
Stain: No obvious pollution is allowed.
The primary material of vegetable mesh bags is plastic. Compared with other materials, plastic has the following characteristics: chemical resistance and gloss. Therefore, the quality of plastic directly affects the quality of plastic vegetable net bags. The following will inform you of some related knowledge of plastic. The following is the knowledge of plastic.
Plastics: Plastics have information on plastic actions. The so-called plasticity refers to the deformation that occurs when an external force is applied. After the external force is cancelled, it can still persist under the condition of the force. The elastic modulus of plastic is between rubber and fiber, and certain deformation can occur under force. Soft plastics are close to rubber, and hard plastics are close to fibers. This is the information of the vegetable net bag
The vegetable net bag can freely change the shape and style. Plastic is a material that uses monomer materials to polymerize by composition or condensation reaction, and plastic is a high molecular compound. The primary component composed of additives such as component resins and fillers, plasticizers, stabilizers, lubricants, colorants, etc. is component resins.
The plastics of vegetable net bags can be divided into the following two categories:
1 Thermosetting: Cannot describe the application from scratch
2 Thermoplasticity: It can be produced repeatedly.
There are two main types of plastic polymer layout:
1 Linear layout: The polymer compound with this layout is called linear polymer compound.
Because of the existence of independent molecules, the linear layout polymer has the characteristics of elasticity, plasticity, dissolution in solvents, melting in heating, and less hardness and brittleness.
2. Body layout: Polymers with this layout are collectively called body polymer compounds.
Because of the absence of independent macromolecules, the high-molecular polymer has no elasticity and plasticity, cannot be dissolved and melted, and can only swell. It has greater hardness and brittleness.
Some of them are bright or semi-clear, and some are outstanding insulators. They are light and solid, easy to process, and can be produced in large quantities. They are cheap, widely used, multi-functional, simple in color, and somewhat resistant to high temperatures.