GB/T 24695-2009Cellophane used for food packaging (English PDF)

1 Scope

This standard specifies the classification, requirements, test methods, inspection rules and markings, packaging, transportation, storage of cellophane for food packaging (hereinafter referred to as food cellophane).

This standard applies to cellophane for transparent packaging of medicines, food and other commodities.

2 Normative references

The provisions in following documents become the provisions of this Standard through reference in this Standard. For the dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this Standard; however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable.

For undated references, the latest edition of the referenced document applies.

GB/T 450 Paper and board - Sampling for testing and identification of machine and cross direction wire side and felt side (GB/T 450-2008, ISO 186:2002, MOD)

GB/T 451.1 Paper and board - Determination of size and deviation

GB/T 451.2 Paper and board - Determination of quantitative weight (GB/T 451.2-2002, eqv ISO 536:1995)

GB/T 451.3 Paper and board - Determination of thickness (GB/T 451.3-2002, idt ISO 534:1998)

GB/T 462 Paper, paperboard and pulp - Determination of moisture in analytical samples (GB/T 462-2008; ISO 287:1985, MOD; ISO 638:1978, MOD)

GB/T 601 Chemical reagents - Preparation of standard titration solution

GB/T 2828.1 Procedure for sampling inspection by attributes - Part 1: Batch- by-batch inspection sampling plan retrieved by acceptance quality limit (AQL) (GB/T 2828.1-2003, ISO 2859-1:1999, IDT)

4 Requirements

4.4 Flat paper specifications are 1000 mm × 1150 mm, 1000 mm × 1200 mm, 900 mm × 1100 mm, 900 mm × 500 mm, or as specified in the contract. The size deviation shall not be greater than; the skewness shall not exceed 5 mm.

4.5 The width and diameter of roll cellophane for food shall be in accordance with the contract requirements; the width deviation shall not exceed.

4.6 Each roll of cellophane for food shall have no more than 2 broken ends. The joints of roll cellophane for food rewinding (or slitting) outside the machine shall be flat-joined by adhesive tape; meanwhile it shall attach a clear mark at the end of the roll or as required by the contract.

4.7 The elasticity of the roll cellophane for food shall be the same; the cut edges shall be neat; there shall be no cracks or damage. The zigzag shape of the roll end surface shall not exceed ±5 mm; the cellophane for food used after rewinding (or slitting) outside the machine shall not exceed ±2 mm.

5 Test method

5.1 The sampling shall be carried out according to GB/T 450.

5.2 The standard atmospheric conditions for specimen treatment and test are carried out in accordance with GB/T 10739.

5.3 The size shall be measured according to GB/T 451.1.

5.4 Quantitative measurement shall be carried out according to GB/T 451.2.

5.5 The thickness and width difference shall be measured according to GB/T 451.3; 5 points shall be measured evenly along the transverse direction of the paper; the result shall be expressed as the difference between the maximum value and the minimum value.

5.6 Tensile strength and elongation shall be measured in accordance with GB/T 12914. During arbitration, it shall be measured in accordance with the constant-speed stretching method.

5.7 The moisture is measured according to GB/T 462.

5.8 The moisture permeability shall be measured according to GB/T 2679.2.

5.9 The sulfur content is determined in accordance with Appendix A.

5.10 Anti-sticking property shall be determined according to Appendix B. nonconformances found in the first sample and the second sample shall be accumulated. If the cumulative number of nonconforming products is less than or equal to the second acceptance number, then the batch is determined to be acceptable; if the cumulative number of nonconforming products is greater than or equal to the second rejection number, then the batch is determined to be unacceptable.

6 Inspection rules

6.6 The purchaser has the right to carry out acceptance inspection according to this standard. If there is any objection to the quality of this product, the supplier shall be notified within three months after receiving the goods to take a sample jointly for re-inspection. If it meets the requirements of this standard or contract, it shall be judged as qualified and the purchaser shall be responsible for processing; if it does not meet the requirements of this standard or contract, it shall be judged as unqualified and the supplier shall be responsible for processing.

7 Markings, packaging, transportation, storage

7.1 Marking and packaging of cellophane for food shall be carried out in accordance with GB/T 10342.

7.1.1 Each 500 sheets of flat paper form a pack. Each pack is attached with a certificate and has a longitudinal mark. Every 10 packs are packed into a carton, the top and bottom of which shall be lined with cardboard and moisture-proof paper or as required by the contract.

7.1.2 Each roll of cellophane for food is wrapped with a plastic sleeve; the two ends are blocked with a series of moisture-proof closed packaging.

7.1.3 The roll cellophane for food can also be packaged in cartons or tubes. For cellophane rolls with a length of more than 700 mm, the roll weight shall not exceed 90 kg or as required by the contract.

7.1.4 Each piece (roll) of paper shall indicate the product name, size, basis weight, grade, net weight, gross weight, carton (tube) number, manufacturer name and production date.

7.3 The product shall be kept properly. It shall prevent the influence of rain, snow and ground moisture during storage and transportation.

Appendix B (Normative) Determination of anti-sticking