This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage of natural and colored polyvinylidene chloride (PVDC) sheet casing films for food packaging. This standard applies to polyvinylidene chloride (PVDC) casing films for food packaging made by secondary blow molding and cut, which are used for filling sausage products. GB/T 17030-1997 Polyvinylidene chloride (PVDC) sheet casing films for food packaging GB/T17030-1997 Standard download decompression password: www.bzxz.net
This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage of natural and colored polyvinylidene chloride (PVDC) sheet casing films for food packaging. This standard applies to polyvinylidene chloride (PVDC) casing films for food packaging made by secondary blow molding and cut, which are used for filling sausage products.

GB/T 17030--- 1997
This standard is formulated on the basis of a comparative analysis of the test data of major domestic polyvinylidene chloride film products and several major polyvinylidene chloride film products from the United States, Japan and other countries. The formulation of this standard provides a basis for the production, operation and international economic and trade activities of this product.
The technical indicators specified in this standard have reached the international advanced level. This standard was proposed by China National Packaging Corporation. This standard is under the jurisdiction of the National Packaging Standardization Technical Committee. The drafting units of this standard are: Tianjin No. 2 Plastic Products Factory, Haiyan Plastic Factory, Dalian Plastics Research Institute. The main drafters of this standard are: Shao Keming, Zhu Haiqun, Pan Shuangyi, Zhang Zongli. 1 Scope
National Standard of the People's Republic of China
Polyvinylidene chloride (PVDC) flat-film for food-packaging
Polyvinylidene chloride (PVDC) flat-film for food-packagingGB/T 17030
This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage of natural and colored polyvinylidene chloride (PVDC) flat-film for food-packaging. This standard applies to polyvinylidene fluoride (PVIDC) casing film for food packaging (hereinafter referred to as casing film) made of polyvinylidene chloride resin by secondary blow molding and cut, used for filling sausage products. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest version of the following standards. GB1037-88 Test method for water vapor permeability of plastic film and sheet - Cup method GB 1038-.70
Test method for air permeability of plastic film
Batch inspection counting sampling procedure and sampling table (applicable to inspection of continuous batches) GB 2828-87
一1996 Analysis method for hygienic standard of polyethylene, polystyrene and polypropylene molded products for food packaging GB/T 5009.60-
GB 6672-86
Plastic film and sheet - Determination of thickness - Mechanical measurement method GB 6673--86
GB 10006--88
GB 1199989
GB 12027--89
GB 13022---91
Determination of length and width of plastic film and sheetDetermination method of friction coefficient of plastic film and sheetTest method for tear resistance of plastic film and sheetElemendorff methodTest method for dimensional change rate of plastic film
Test method for tensile properties of plastic film
GB/T 14943-94
Analysis method for residual 1,1-dichloroethane in polyvinyl chloride resin and molded products for food containers and packaging materials3 Requirements
3.1 Specifications
3.1.1 The thickness limit deviation of the sausage film shall comply with the requirements of Table 1. Table 1 Thickness limit deviation
Nominal thickness
0.035~～0.050
Qualified products
3.1.2 The width of the sausage film shall be agreed upon by the supply and demand parties, and the width limit deviation is +1%. The length of each roll of sausage film is greater than or equal to 1200m. 3.2 Appearance
Approved by the State Administration of Technical Supervision on October 9, 1997, and implemented on May 1, 1998
GB/T17030---1997
Casing film should be flat, without perforations, color difference, water marks, stiff blocks, bubbles, etc. that affect use. Carbonization points and impurities with a diameter of more than 1mm are not allowed. The surface of the film roll is not allowed to have obvious ribs and warped edges, and the end faces are neat. The distance between the two ends of the film roll and the two ends of the paper tube should not exceed 4mm. The joints should be bonded with tape that is easy to distinguish the color. The number of broken ends per roll of film and the length of each section should meet the requirements of Table 2. Table 2 Number of broken ends and length of each section
Number of broken ends, pieces
Length of each section, m
Physical and mechanical properties should meet the requirements of Table 3.
Tensile strength (longitudinal/transverse)
Elongation at break (longitudinal/transverse)
Tear resistance (longitudinal/transverse)
Heat shrinkage (longitudinal/transverse)
Water vapor permeation
Oxygen permeation
Dynamic friction coefficient (film/film)
3.4 ​​The hygienic properties of casing film shall comply with the requirements of Table 4. Item
Vinylidene chloride, mg/kg
Vinyl chloride mg/kg
Evaporation residue
Potassium permanganate consumption (distilled water 60℃, 2h), mg/LHeavy metal (4% acetic acid), mg/L
Decolorization test
Note: Decolorization test is not performed on natural color films. 4 Test methods
≥300
Physical and mechanical properties
g/(m2·24h)
cm2/(m2.24h ·MPa)
Sanitary performance
Distilled water (60℃, 2h)≤
4% acetic acid (60℃, 2h)≤
20% ethanol (20℃, 2h)≤
N-hexane (20℃, 2h)≤
Soaking liquid
≥60/80
≥50/40bzxZ.net
—15～30
4.1 Sampling
Remove four layers from the test film roll and cut four samples of sufficient area. The width of the sample should be greater than or equal to 130mm. One piece is used for specification and appearance inspection, one piece is used for physical and mechanical performance inspection, one piece is used for sanitary performance inspection, and one piece is used for standby. 4.2 Thickness
Perform in accordance with GB6672.
4.3 Appearance
Visual inspection under natural light, the end face distance is measured with a steel ruler with an accuracy of 1mm. 156
Each length is carried out in accordance with GB6673.
4.4 Physical and mechanical properties
4.4.1 Tensile strength and elongation at break
GB/T 17030
According to GB13022. The specimen adopts N type, width 15mm; test speed (250±25)mm/min. 4.4.2 Tear resistance
According to GB11999.
4.4.3 Heat shrinkage
According to GB12027. The heating medium is air, the test temperature is (120±2)℃, and the test time is 30min. 4.4.4 Water vapor transmission rate
The test shall be carried out in accordance with GB1037, and the test conditions shall be condition B. 4.4.5 Oxygen transmission rate
The test shall be carried out in accordance with GB1038, and the temperature shall be (23 ± 1) °C. 4.4.6 Dynamic friction coefficient
The test shall be carried out in accordance with GB10006.
4.5 Hygienic properties
4.5.1 Vinylidene chloride monomer and vinyl chloride monomer shall be tested in accordance with GB/T14943. 4.5.2 Evaporation residue, potassium permanganate consumption, heavy metal and decolorization tests shall be carried out in accordance with GB/T5009.60. 5 Inspection rules
5.1 Batch
The casing film shall be accepted in batches. The casing film produced with the same brand of raw materials and the same process conditions shall be a batch of less than 10t. 5.2 Sampling
The specifications and appearance of casing film samples shall be taken in accordance with the normal inspection secondary sampling plan in GB2828, see Table 5. Each roll of casing film is a sample unit. The physical and mechanical properties and hygienic properties samples of casing film are cut from different sample units of any sample taken. Casing film with a width of less than 130mm is cut from the same batch of film rolls that can meet the sample requirements. The manufacturer shall retain no less than 1m2 of test samples for each batch of products for physical and mechanical property tests. Table 5 Sampling and judgment
281~500
501~~1200
1201~3200
3201～10000
5.3 Inspection plan
5.3.1 Factory inspection
Sample size
Black meter sample size
Qualified judgment number
Unqualified judgment number
GB/T 17030—1997
The factory inspection items are 3.1, 3.2 and 1, 2, 3, 4 in 3.3 of this standard. 5.3.2 Type inspection
Type inspection refers to all items in the requirements. Type inspection is required in any of the following situations: a) Trial design and identification of new products or old products for transfer to factory production; b) Once a year in normal production; c) When there are major changes in formula and process;
d) When production is resumed after suspension for more than half a year;
e) When there is a big difference between the factory inspection result and the last type inspection; f) When the quality supervision agency makes an inspection request. 5.4 Judgment rules
5.4.1 Judgment of sample unit quality
If the specifications and appearance items do not meet the standard requirements, the item of the sample is unqualified. 5.4.2 Judgment of delivery batch quality
5.4.2.1 Specifications and appearance items are carried out according to Table 5, inspection level 1, qualified quality level (AQL) 4.0. 5.4.2.2 If all specifications and appearance items are qualified, the specifications and appearance of this batch of products are qualified. 5.4.2.3 If the average values ​​of various tests of physical and mechanical properties meet the requirements of the standard, the physical and mechanical properties of the batch are qualified; if they are unqualified, and they are still unqualified after double sampling and retesting, the physical and mechanical properties of the batch are unqualified. 5.4.2.4 If all the hygiene indicators meet the requirements of the standard, the hygiene indicators of the batch are qualified. 6 Marking, packaging, transportation, storage
6.1 Marking
Each box of casing film should be accompanied by a product certificate, which should indicate the manufacturer's name, product name, registered trademark, manufacturing date, product specifications, length of each roll, grade, standard number, inspector's seal, etc. The carton should indicate the manufacturer's name, address, product name, product specifications, number of rolls, and moisture-proof and heat-proof marks. 6.2 Packaging
Casing film is packaged in corrugated paper boxes with plastic bags as the inner lining. Each roll of casing film is loaded into the box in the vertical direction of the core tube, and the bag mouth is tied tightly. The carton is sealed with tape. If other requirements are required, the supply and demand parties shall agree on them. 6.3 Transportation
The products should be handled with care during transportation, and prevent mechanical collisions and exposure to the sun and rain. They should not be transported together with toxic and hazardous substances. 6.4 Storage
The products should be stored vertically in a clean, cool and dry warehouse with a room temperature of 15-25℃. The cartons should not be damaged and they should not be stored together with toxic and hazardous substances. The storage period shall not exceed six months from the date of production. 138
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