- 1 - ICS 83.140.01 
Y 28  
 
  
 
National Standard  
of the People's Republic of China 
  
GB 10457-2008 
 Replaces GB 10457-1989 
 
 
Plastic Cling Wrap film  
for keeping food fresh 
 
 
   
(Draft for approval) 
 
(Draft completion date: 21 June 2008) 
 
 
 
 Issue Date: XXXX – XX – XX Impl ementation Date: XXXX – XX – XX 
 
 
 
Issued by the General Administration of Quality Supervision, Inspection and 
Quarantine of the People 's Republic of China  
Standardization Administration of  the People's Republic of China 
 
- 2 - 
             
Foreword 
Clause 5 and Section 6.6 of this Standard are mandatory clauses. 
 This Standard replaces GB 10457-1989 (Cling wrap  polyethylene film for keeping food fresh). 
 Compared to GB10457-1989, the main differences in this Standard are: 
− the title of the Standard has been changed from Cling wrap polyethylene film for keeping 
food fresh  to Plastic cling wrap film for keeping food fresh; 
− the scope of the Standard has been expanded from polyethylene cling wrap film to include 
other plastic cling wrap film; 
− the technical requirements for ma terials have been expanded; 
− length deviation has been amended to roll weight deviation; 
− gas transmission rate has been amended to deviation of gas transmission rate; 
− water vapour transmission has been amended to deviation of water va pour transmission rate; 
− markings for the nominal values of the roll weight, gas transmission rate and water vapour 
permeance have been added; 
− marking requirement for materials has been added. 
 This Standard is proposed by China National Light Industry.  This Standard is under the jurisdiction of the China National Technical Committee of Standardisation for Plastic Products.  The main organisations that participated  in the drafting of this Standard:  
Institute of Plastics Processing & Application of Light Industry; 
Shenzhen Wandajie Plastic Product Co., Ltd; 
Shenzhen Junhao Plastic Product Co., Ltd; National Centre of Testing and Supervision for Quality of Plastic (NTSQP) (Beijing). 
 The main drafters of this Standard:  Weng Yunxuan, Chen Jiaqi, Chen Qian, Xu Lidang, Wei Wenchang, Su Junming.  This Standard replaces the followi ng previously issued Standards: 
- GB 10457-1989.  - 3 - 
            
Plastic cling wrap film for keeping food fresh 
 
1 Scope 
This Standard specifies the definitions and term s, product classifications, marking, requirements, 
test methods, inspection rules, labels, packaging, tran sport and storage of plastic cling wrap film for 
keeping food fresh.  This Standard applies to plastic cling wrap film for keeping food fresh (hereinafter referred to as 
cling wrap film) which is made  of resin such as polyethylen e, polyvinylchloride, polyvinyl 
dichloride, processed by the method of monolayer or multilayer extrusion 
2 Normative references 
The provisions of the following documents become  provisions of this Standard after being 
referenced. For dated reference documents, a ll later amendments (excluding corrigenda) and 
versions do not apply to this Standard; however, the parties to the agreement are encouraged to 
study whether the latest versions of these doc uments are applicable. For undated reference 
documents, the latest versions apply to this Standard.  GB/T 1037-1988, Test method for water vapour tran smission of plastic film and sheet – Cup 
method 
（NEQ ASTM E96:1980 ）  
 
GB/T 1038-2000, Plastic – film and sheeting – Dete rmination of gas transmission – Differential 
pressure method （NEQ ISO 2556:1974 ）  
 
GB/T 1040.3-2006, Plastic – Determination of tensile properties – Part 3: Test conditions for films 
and sheets  GB 2410-1980, Transparent plastics – Transmissivity and haze test  GB/T 2828.1-2003, Sampling procedures for inspection by attributes – Part  1: Sampling schemes 
indexed by acceptance quality limit (AQL) for lot-by-lot inspection  GB/T 2918, Plastic-standard atmospheres for conditioning and testing 
 
GB/T 5006.60, Method for analysis of hygienic standa rd of products of polyethylene, polystyrene 
and polypropylene for food packaging  GB/T 5009.67, Method for analysis of hygienic standa rd of products of polyvinyl chloride for food 
packaging  GB/T 6672-2001, Plastics film and sheeting – Determ ination of thickness by mechanical scanning 
 GB 9681, Hygienic standard of products of  polyvinyl chloride for food packaging 
 GB 9685, Hygienic standard for use of additives  in food containers and packaging materials 
 GB 9687, Hygienic standard for polyethylene products used as food containers and tableware - 4 - 
  
GB/T 16288-2008, Marking of plastic products  GB/T 17030, Polyvinyl di chloride (PVDC) flat-film for food-packaging 
 QB/T 1130-1991 Plastic determination of right angle tear resistance 
3 Terms and definitions  
The definitions and terms listed below apply to this Standard. 
3.1 Cling wrap film for keeping food fresh 
Film used to pack food. Has the function of self-cling and keeping food fresh or hygienic. 
3.2 Polyethylene cling wrap film for keeping food fresh 
A type of food-use cling wrap film which is made of polyethylene (PE). 
3.3 Polyvinylchloride cling wrap f ilm for keeping food fresh   
A type of food-use cling wrap film whic h is made of polyvinylchloride (PVC).  
3.4 Polyvinyl dichloride cling wrap film for keeping food fresh   
A type of food-use cling wrap film which is made of polyvinyl dichloride (PVDC). 
3.5 Multilayer extrusion cling wrap film for keeping food fresh   
A type of food-use cling wrap film which is  processed by the method of multilayer extrusion. 
3.6 Self-cling 
The self-cling property of the cling wrap film  itself, also called shear and peel strength. 
3.7 Open-wrapping 
The degrees of difficulty of removing th e film from the paper core during use. 
3.8 Anti-fogging 
The property of preventing a cling wrap film from forming any wa ter drops or water fogging on the 
film surface. 
4 Classification 
On the basis of the materials and the process t echniques, cling wrap film  can be divided into 
polyethylene cling wrap film, polyvinylchloride cl ing wrap film, polyvinyl dichloride cling wrap 
film, and multilayer extr usion cling wrap film. 
5 Marking 
Cling wrap film should have product material ma rkings or variety markings in accordance with 
GB/T 16288. 
For the mass content of any additive which ex ceeds 1%, the specific name or the chemical 
structural of the additive must be indicated. 
The nominal values of the oxygen transmission rate (unit is cm
3/(m2·24h·atm)), the carbon dioxide - 5 - 
 transmission rate (unit is cm3/(m2·24h·atm)) and the water va pour permeance (unit is g/(m2·24h)) of 
a cling wrap film s hould be indicated. 
The nominal value of the roll net weight of  a cling wrap film should be indicated. 
Cling wrap film should be marked with the words “for food use”. Polyvinylchloride cling wrap film  should be marked with warnings  such as “Must not come into 
contact with food containing fats”,  “Not suitable for microwave heating”, or “Must not be used at 
high temperatures”. 
For cling wrap film that can be microwave-heate d, the cling wrap film s hould be marked with the 
words “Microwave oven safe”, the heating methods and the maximum safe temperature. 
Marking methods can be printing, etc. The mark can  be made on the outer packaging of the product 
or on the product itself. 
6 Requirements 
6.1 Materials 
6.1.1 Resin 
The resin selected should be a food grade material. 
6.1.2 Additive 
The additives selected and their dosages s hould meet the provisions set out in GB 9685. 
6.2 Colour 
Cling wrap film should be a transparent, normal natural colour. 
6.3 Dimensional deviation 
6.3.1 Thickness deviation 
Table 1 Requirements for thickness deviation 
Index 
Item 
Thickness limit deviation, mm 
≤ 0.010 + 0.002 
- 0.002 Nominal thickness (t), 
mm 
> 0.010 + 0.003 
- 0.003 
 
6.3.2 Width deviation 
Table 2 Requirements for width deviation 
Index Item 
Width limit deviation, mm 
w ≤ 200 ± 4 
200 < w ≤ 400 ± 5 Nominal width (w), 
mm 
w > 400 ± 6 - 6 - 
  
6.3.3 Roll net weight (mass) deviation 
Table 3 Requirements for roll net weight (mass) deviation 
Item Index 
Roll net weight (mass) deviation, % -1 
 
6.4 Appearance The appearance of a cling wrap film should meet  the specifications prescribed in Table 4. 
Table 4 Requirements for the appearance of cling wrap film 
Item Requirement 
Air bubbles, perforations and ruptures Not permitted 
Impurities, number/m2 
> 0.6 mm 
≥ 0.3 mm and ≤0.6 mm 
Dispersions, number/10 cm x 10 cm  
Not permitted Not permitted to be more than 8 Not permitted to be more than 5 
Fish eyes and lump blocks, number/m2 
> 2 mm ≥ 0.2 mm and ≤ 2 mm 
Dispersions, number/10 cm x 10 cm  
Not permitted Not permitted to be more than 20 Not permitted to be more than 5 
Degree of evenness  The surface of the f ilm is generally 
even, few pleats are permissible, a small amount of film edge exceeding the paper core is permissible, but this must not affect the pulling of the film roll out of its box. 
 
6.5 Physical-mechanical properties 
The physical-mechanical properties of a cling wrap film should meet the specifications prescribed 
in Table 5. 
Table 5 Requirements for physical-mechanical properties  
Index Item 
PE PVC PVDC Multilayer 
extrusion 
Tensile strength (longitudinal, transverse), MPa ≥ 10 ≥ 15 ≥ 60 ≥ 10 
Nominal tensile strain at 
break (longitudinal, transverse), % ≥ 120 ≥ 150 ≥ 50 ≥ 120 
Light transmissivity, % ≥ 90 ≥ 92 ≥ 90 ≥ 90 - 7 - 
 Haze, % ≤ 3 ≤ 2 ≤ 3 ≤ 3 
Right angle tear strength 
(longitudinal, transverse), N/cm ≥ 40 
Deviation of gas 
transmission rate  – oxygen, % ±  20 
Deviation of gas 
transmission rate – carbon dioxide, % ±  20 
Deviation of water 
vapour permeance , % ±  20 
Self-cling (shear and 
peel strength), N/cm2 ≥ 0.5 
Open-wrapping The sample should be able  to be completely peeled off  
within 5 seconds 
Anti-fogging Under test conditions, no  water drops should adhere to the 
film surface, or only small localised water drops. No water drops should adhere to large areas of the cling wrap film surface. 
 
6.6 Hygienic property 
The hygienic properties for polyethylene cling fi lm should meet the provisions set out in GB 9687. 
The hygienic properties for polyviny lchloride cling film should meet  the provisions set out in GB 
9681. 
The hygienic properties for polyvinyl  dichloride cling film should meet the provisions on hygienic 
properties set out in GB/T 17030. 
The hygienic properties for multilayer extrusion cli ng film should meet the provisions set out in 
hygienic standards for corresponding items of the material in direct  contact with food When testing, 
use the plastic film layer which comes into contact with food to carry out h ygienic property tests. 
Cling wrap film made of other materials should meet the hygienic  property provisions for specific 
materials set out in the corresponding standards. 
7 Test methods 7.1 Sample conditioning and testing environment 
The conditioning of any sample shall be conducted with the standard environment temperature of 
23
oC± 2oC specified in GB/T 2918, and the test sh all be conducted under these conditions. The 
conditioning time shall be longer than 4 hours. 
7.2 Dimensional deviation 
7.2.1 Thickness The measurements of the thickness shall be conducte d in accordance with the provisions set out in 
GB/T 6672-2001in order to determine uniform measur ements for 10 spots along the width direction - 8 - 
 of the plastic cling wrap film. The thickness limit deviation shall be determined by formula (1). 
∆t = t min or max –  t0 …......................................................(1) 
in which,  
tmin or max  -- The actual measured maximum or minimum value, in millimetres (mm) 
t0 – The nominal thickness, in millimetres (mm) 
∆t – The thickness limit deviation, in millimetres (mm) 
7.2.2 Determination of the width The measurements of the width shall be conducte d in accordance with the provisions set out in 
GB/T 6673-2001 in order to determine 10 isometric width measurements. The width limit deviation 
shall be determined by formula (2). 
∆
w  = w min or max - w 0 …...............................................(2) 
in which, 
wmin or max – The actual measured maximum or mi nimum width, in millimetres (mm) 
w0 – The nominal width, in millimetres (mm) 
∆w – The width limit deviation, in millimetres (mm) 
7.2.3 Roll weight (mass) deviation Remove the outer packaging of the cling wrap film  and place the cling wrap film onto a pair of 
scales to weigh it. The roll net weight (mass) deviation shall be determined by formula (3): 
…....................................... (3) 
in which, 
G – The actual determined net weight of the roll, in grams (g) G
0 – The nominal net weight of the roll, in grams (g) 
∆G – The roll net weight (mass)  deviation, percentage (%) 
 7.3 Appearance test 
The appearance indexes for air bubbles, perforations , ruptures and unevenness shall be determined 
by performing a visual insp ection under na tural light. 
The sizes of the impurities, fish eyes and lump bloc ks shall be determined with a tenfold magnifier, 
using the maximum length to calcula te. The dispersion shall be determ ined with a frame-board of 10 
cm x 10 cm. 
7.4 Physical and mechanical properties 7.4.1 Tensile strength and nominal tensile strain at break The determination shall be c onducted in accordance with GB/T 1040.3-2006. Two samples with a 
width of 10 mm and a gauge length of  50 mm shall be used. The test speed (no-load) is 500 mm/min 
± 50 mm/min. 
7.4.2 Right angle tear strength The determination of right angle tear strength sha ll be conducted in accordance with the provisions - 9 - 
 set out in QB/T 1130-1991. 
7.5 Deviation of gas transmission rate The determination of gas transmission rate shall be conducted in accordance with the provisions set 
out in GB/T 1038-2000. The deviati on of the gas transmission rate shall be determined by formula 
(4): 
…............................................... (4) 
in which, 
Y – The actual measured oxygen transmission rate, in cubic centimetres/(m2·24 hours 
atmospheric pressure) (cm3/(m2·24h·atm)) 
Y0 – The nominal oxygen transmissi on rate, in cubic centimetres/(m2·24 hours atmospheric 
pressure) (cm3/(m2·24h·atm)) 
∆Y – The deviation of the oxygen transmission rate, percentage (%) 
The deviation of the carbon dioxi de transmission rate shall be determined by formula (5): 
…....................................................(5) 
in which, 
R – The actual measured carbon dioxide tran smission rate, in c ubic centimetres/(m2·24 hours 
atmospheric pressure) (cm3/(m2·24h·atm)) 
R0 – The nominal carbon dioxide transmi ssion rate, in cubic centimetres/(m2·24 hours 
atmospheric pressure) (cm3/(m2·24h·atm)) 
∆R– The deviation of the carbon dioxide transmission rate, percentage (%) 
7.6 Deviation of water vapour permeance  The determination of the water vapour permeance shall be conducted in accordance with the 
provisions set out in GB/T 1037-1988, the deviati on of the water vapour permeance shall be 
determined by formula (6): 
…....................................................(6) 
in which, 
H – The actual measured water vapour permeance, in grams/(m2·24 hours) (g/(m2·24h)) 
H0 – The nominal water vapour permeance in grams/(m2·24 hours) (g/(m2·24h)) 
∆H– The deviation of the water vapour permeance , percentage (%) 
7.7 Light transmissivity and haze 
The determination of light tran smissivity and haze shall be c onducted in accordance with the 
provisions set out in GB/T 2410-1980. 
7.8 Self-cling (shear and peel strength) 7.8.1 Sample preparation - 10 - 
 Cut 10 sheets of sample 50 mm long and 25 mm wide , with every two sheets forming a set. Place 
the adhesive sides of each set of sa mples face to face in a lap joint, the length of the lap joint being 
15 mm and the width of the lap joint being 25 mm. Lay the samples on a smooth surface, use a rubber roller (diameter of 40 mm , length of 100 mm, mass of 300 g) and carry out reciprocation 
rolling and press on the lap joint th ree times, until there is no air le ft between the lap-jointed layers 
of cling wrap film. Leave the prepared samples in an environment under test conditions for 20 minutes and then conduct the test. 
7.8.2 Test method Stretch out each set of the samples on a tension machine and determine the force needed to separate 
the two sheets of sample. The arithmetic mean value of the five sets shall be regarded as the result. The test instrument shall meet the provision s set out in GB/T 1040.3- 2006 and the stretching 
velocity is 250 ± 50 mm/min. The se lf-cling (shear and peel stre ngth) shall be determined by 
formula (7): 
T=P
a×b…...............................................(7) 
in which, 
T – The self-cling (shear and peel  strength), in Newton/centimetre2 (N/cm2) 
P – The force needed to separa te the sample, in Newtons (N) 
b – The width of the lap joint, in centimetres (cm) a – The length of the lap joint, in centimetres (cm) 
7.9 Determination of the open-wrapping 7.9.1 Sample preparation Cut 6 sheets of sample 150 mm long and 50 mm wide , with every two sheets forming a set. Place 
the adhesive sides of each set of sa mples face to face in a lap joint, the length of the lap joint being 
100 mm. The processing and treatment methods are the same as specified in Section 6.9.1 [sic] of 
this Standard. 
7.9.2 Test method Fix one end of the sample and at the other end of the sample fix a 4 g weight using the self-cling of 
the cling wrap film or a piece of adhesive paper.  Let the weight down slowly and allow the sample 
to peel naturally. See Diagram 1 for the test sc hematic. All three sample sets should meet the 
property requirements. - 11 - 
  
  7.10 Determination of the anti-fogging Add 200 ml of water at a temperature of 23
oC± 2oC into each of three beakers with a volume of 
1000 ml. Use three equal-sized pieces of cling wrap  film, with the adhesi ve side facing down, to 
completely cover each of the beaker mouths. Ensu re the film surfaces are flat, and put the three 
beakers into a low temperature tank at 3oC to maintain a constant temperature. After 10 minutes, 
check the adhesive state of the water drops on the surface of the cling wrap film. All three samples 
should meet the property requirements. 
7.11 Hygienic property When the material is polyethylene, the test  shall be conducted in accordance with GB/T 5009.60. 
When the material is polyvinylchloride, the te st shall be conducted in  accordance with GB/T 
5009.67. 
When the material is polyvinyl dichloride, the test shall be conducted in accordance with GB/T 
17030. 
For cling wrap film made of othe r plastic materials, the test sha ll be conducted in accordance with 
the analysis methods set out in hygienic standards for products made of the corresponding materials. 
8 Inspection rules 8.1 Group lot The acceptance check for the products shall use the lo t as the unit. Products which are made of the 
same grade material have the same specifications , the same formula and have been continuously 
- 12 - 
 produced. One lot shall not exceed 10,000 rolls. 
8.2 Inspection classification 8.2.1 Factory inspection  The factory inspection items are appearance, dime nsional specification, tensile strength, nominal 
tensile strain at br eak and self-cling. 
8.2.2 Type inspection  The type inspection items are all the items specified  in the technical requirements. Type inspections 
must be conducted at least once a year. 
8.3 Sampling plan 8.3.1 Dimensional deviation, appearance Adopt the normal double sampling plan specifie d in GB/T 2828.1-2003. The Inspection Level (IL) 
shall be the general inspection le vel II, the Acceptance Quality Lim it (AQL) shall be 6.5, see Table 6 
for  detailed samples and decision arrays. E ach roll is regarded as one sample unit. 
Table 6 Sampling number and decision method  
Unit: Roll 
Lot size Sample Sample size Cumulative 
sample size Acceptance 
number (Ac) Rejection 
number (Re) 
26 ~ 50 First sample 
Second sample 5 
5 5 
10 0 
1 2 
2 
51 ~ 90 First sample 
Second sample 8 
8 8 
16 0 
3 3 
4 
91 ~ 150 First sample 
Second sample 13 
13 13 
26 1 
4 3 
5 
151 ~ 280 First sample 
Second sample 20 
20 20 
40 2 
6 5 
7 
281 ~ 500 First sample 
Second sample 32 
32 32 
64 3 
9 6 
10 
501 ~ 1200 First sample 
Second sample 50 
50 50 
100 5 
12 9 
13 
1201 ~ 3200 First sample 
Second sample 80 
80 80 
160 7 
18 11 
19 
≥ 3201 First sample 
Second sample 125 
125 125 
250 11 
26 16 
27 
8.3.2 Physical and mechanical properties 
Take any roll from the extracted samples to carry out the inspection. 
8.3.3 Hygienic properties Take any roll from the extracted samples to carry out the inspection. 
8.4 Determination rules 8.4.1 Determination for conforming items - 13 - 
 The determination of the appearance and dimens ional deviation for the sample unit shall be 
conducted in accordance with Section 5.3, 5.4 respectiv ely. If the inspection results of the sample 
unit meet the specifications prescribed in Ta ble 1, then the appearan ce and the dimensional 
deviation shall be determined as conforming items. 
In the case of any nonconforming physical or mechan ical property, a double-sized sample shall be 
extracted from the original lot to  re-inspect each of the nonconforming items. The items cannot be 
regarded as conforming until the re-inspection resu lts are all qualified; otherwise they shall be 
determined as nonconforming. 
When there is any nonconforming item existing in the hygienic propertie s, then the hygienic 
properties shall be determined as nonconforming. 
8.4.2 Determination for conforming lots When all of the inspection results for appearance , dimensional deviation, physical and mechanical 
properties and hygienic properties conform, then the lot can be regarded as a conforming lot. 
9 Packaging labels, packaging, transport and storage 9.1 Packaging labels The packaging box (bag) shall be marked with the following information: a) Product name; b) Product quantity and specifications; c) Name and trademark of the manufacturer; d) Production date and expiry date; e) Product material and species; f) The specific name and chemical  structure of each additive; 
g) The nominal values of the oxygen transmission rate, carbon dioxide tran smission rate and water 
vapour transmission rate; 
h) The nominal value of  the roll net weight; 
I) The words “for food use”; 
j) Warnings or other explanations; 
9.2 Packaging 9.2.1 Inner packaging Use film bags or racked boxes as sealed packaging. 
9.2.2 Outer packaging Cardboard boxes or other suitable packaging shal l be selected for the outer packaging of the 
products. 
9.3 Transport  During the transportation of the product, attenti on must be paid to damp-proofing and protection 
from sunlight. During handling, the product must be  carefully lifted up a nd put down and have no 
heavy loads placed on top of it. 
9.4 Storage The product must be stored in clea n, dry warehouses, must not come into contact with any corrosive - 14 - 
 chemical substances and other ha rmful substances, the distance fr om any heat sour ce shall be at 
least one metre and the reasonable storage durat ion shall be determined on the basis of the 
properties of the plastic cling wrap film. The st orage duration must not exceed two years from the 
production date.