GB/T 28004.1-2021Disposable diapers—Part 1:Disposable diapers for baby (English PDF)

3.1 Absorption speed

The time required for a specimen to absorb a certain amount of test solution

3.2 Rewet

After the specimen absorbs a certain amount of test solution, under a certain pressure, the mass of the test solution returned to the surface layer

3.3 Leakage

After the specimen absorbs a certain amount of the test solution, under a certain pressure, the mass of the test solution that passes through the anti-leakage bottom film

3.4 Top sheet

SAP residual super absorbent resin attached to the surface of the specimen

3.5 Foreign material substances other than

the normal composition and form of baby diapers, diaper mats, diaper pads (nursing pads)

7.1 Specimen processing

When measuring piece mass deviation, permeability, surface layer attachment, and anti-side leakage performance, the specimen shall be treated for at least 4 hours under the temperature and humidity conditions specified in GB/T 10739. Test under these conditions.

7.2 Piece mass deviation

Use a balance of which the resolution is 0.1g to weigh the net weight of 6 specimens of the same specification. 6 specimens are from at least two minimum sales packages.

7.3 Penetration properties

Penetration properties are determined in accordance with Annex A.

7.4 Top sheet SAP residual

WARNING - Copper sulfate is toxic and shall be used with care.

Take any two specimens (from the two smallest sales packages). Cut the elastic band (pants type diaper). Use a splint or tape to secure the specimen to the plate. Place horizontally on the test bench. Use a watering bottle to evenly spray 0.5% copper sulfate solution on the surface of the specimen (the surface of the specimen can be slightly moistened).

7.5 pH value

The pH value is determined according to Annex B.

7.6 Foreign material

The foreign material is determined according to Annex C.

7.7 Anti-side leakage performance

Take any two specimens (from the two smallest sales packages). Cut the elastic at the waist (pants type diapers). Use a splint or Velcro to fix the specimen on the rectangular plate. The length direction of the specimen shall be parallel to the direction of the long side of the plate. Tilt the plate at 45° to the horizontal.

7.8 Delivery moisture

Delivery moisture is determined according to GB/T 462. Sampling method.

7.9 Heavy metal content

The content of heavy metals lead, arsenic, cadmium and mercury shall be determined according to 1.6 in Chapter 4 of "Safety Technical Specifications for Cosmetics" (Edition 2015). Use microwave digestion method for sample processing.

7.10 Migratory fluorescent substances

The migratory fluorescent substances are determined according to Annex D.

7.11 Acrylamide content

Acrylamide content is determined according to GB/T 37859.

7.12 Formaldehyde content

The formaldehyde content is determined by high performance liquid chromatography in GB/T 34448-2017.

7.13 Phthalates content

The phthalate content is determined according to GB/T 37860.

7.14 Decomposable carcinogenic aromatic amine dyes

Decomposable carcinogenic aromatic amine dyes are determined according to GB/T 17592 and GB/T 23344. See Annex E for a list of decomposable carcinogenic aromatic amine dyes. When testing, try to take samples from the parts with darker printing or dyeing.

7.15 Hygiene indicators

Hygiene indicators are determined according to GB 15979.

7.16 Applicable maximum waist circumference of diapers

The applicable maximum waist circumference of diapers is determined in accordance with Annex A of GB/T 33280-2016.

7.17 Appearance quality

Appearance quality is visually inspected.

8.1 Exit-factory inspection

Products shall be inspected batch by batch according to the requirements of this Part before leaving the factory. Products can only leave the factory if they meet the standard.

8.2 Type inspection

Similar products with the same raw materials and the same process shall be subject to type inspection no less than once every two years. Type inspection shall also be carried out in one of the following situations.

8.3 Inspection items Exit-factory

inspection items are routine inspection items. Type inspection items include all inspection items, as shown in Table 3.

8.5 Sampling method

8.5.1 Exit-factory inspection

From a batch of products, randomly select 3 products. Take 2 packs (each pack is counted as 20 pieces) samples from each piece, 6 packs of samples in total. 4 packs are used for inspection and 2 packs are used for re-inspection. If there are less than 20 pieces per package, 120 pieces shall be converted into the corresponding minimum packaging unit.

8.6 Rules for determination

8.6.1 Exit-factory inspection

When the inspected product meets all the technical requirements of the exit-factory inspection in Table 3, it will be judged as conforming. When any one of these inspection items fails, it is judged to be nonconforming.

8.7 Quality assurance

The product can only leave the factory after passing the inspection and attaching the quality mark.

9.1 Product sales identification and packaging

9.1.1 The following contents shall be indicated on the product sales package.

9.1.2 The sales packaging of the product shall ensure that the product is not contaminated. The various identification information on the sales package shall be clear and not easy to fade.

9.2 Product transportation and storage

9.2.1 Products shall use clean tools with protective measures during transportation. Prevent heavy pressure, sharp object collision, sun and rain.

9.2.2 The finished product shall be stored in a dry and ventilated room without direct sunlight. Prevent the effects of rain, snow and ground moisture. Must not coexist with polluting or toxic chemicals.