1 Scope
This document specifies the physical and chemical properties, test methods and inspection of polyethylene (PE) / ethylene vinyl acetate copolymer (EVA) children's foam pads test rules.
This document applies to low-density polyethylene. Ethylene vinyl acetate copolymer and its mixture as the main raw material, adding foaming agent, cross-linking agent and other additives, by the mold add blowing agent, cross-linking agent and other additives, by the production of molded foam and post-processing and made of children's foam pads.
2 Normative reference documents.
The contents of the following documents constitute the essential provisions of this document through the normative references in the text. Among them, note the date of the cited documents
The date of the referenced documents, only the date of the corresponding version applies to this document; do not note the date of the referenced documents, the latest version (including all the revision of the list) applies to this document.
GB/T 2918 plastic specimen condition and test standard environment
GB/T3920 textile color fastness test mo shake color fastness
GB/T 5713 Textile color fastness test Color fastness to water
GB/T 6344 soft foam polymeric material tensile strength and elongation at break determination
GB 6675.2- 2014 Toy safety Part 2: Mechanical and physical properties
GB 6675.4- 2014 Toy safety Part 4: Migration of specific elements
GB/T10808 Determination of the tear strength of polymeric porous elastic materials
GB/T17592 Determination of prohibited azo dyes in textiles
GB/T 22048 Determination of specific phthalate plasticizers in toys and children's products
GB/T 26193 Determination of migratable elements antimony, arsenic, barium, cadmium, chromium, lead, mercury, selenium in toy materials Inductively coupled plasma plasma
Harmony method
GB/T 28190 Determination of dimethyl fumarate in textiles
GB/T 29784.2 Determination of polycyclic aromatic hydrocarbons in electrical and electronic products Part 2: Gas chromatography mass harmonization method
GB/T 34842 Chemical test methods for footwear Determination of methylamide
GB50325-2020 indoor environmental pollution control standards for civil construction projects
QB/T5158 Test method for synthetic leather dimethylformamide content determination
QB/T 5354 Test method for synthetic leather of artificial leather Determination of volatile organic compounds
3 terms and definitions
There are no terms and definitions that need to be defined in this document.
4 physical and chemical properties
5 test methods
5.1 Preparation of specimen
The sample should be allowed to stand for 48 hours before the preparation of the specimen.
5.2 Specimen Conditioning and test environment
Unless otherwise specified, the specimen should be GB/T 2918, in (23 Shi 2) C, relative humidity (50 Shi 10) % of the environment for specimen condition and test. Conditioning time should not be less than 2h. and test under these conditions.
5.3 Tensile strength
GB/T 6344 according to the provisions of the test, where the specimen is 1A, the tensile speed of (500 Shi 50) mm / min.
5.4 Elongation at break
GB/T 6344 according to the provisions of the test, where the specimen is 1A, the speed of stretching (500 Shi 50) mm / min.
5.5 Tear strength
Test according to the provisions of GB/T10808, the speed of stretching (500 Shi 50) mm / min.
5.6 Small parts test
GB6675.2 - 2014 in accordance with the provisions of 5.2 test.
5.7 Fastness to rubbing color
Test according to the provisions of GB/T3920. The reciprocal rubbing 10 times, the worst result of the three specimens as the test results.
5.8 Color fastness to water
Test according to the provisions of GB/T5713. The worst result of 3 specimens as the test results.
5.9 formaldehyde emission
According to GB50325 - 2020 in Appendix B of the test.
5.10
Migratable elements
Test according to GB/T26193, where the sample preparation in accordance with GB6675.4 - 2014 in 8.2 of the provisions.
5.11 decomposable aromatic amine dyes
Test according to GB/T17592.
5.12 Dimethyl fumarate
Test according to the provisions of GB / T 28190.
5.13 Dimethylformamide (DMF)
Test according to the provisions of QB/T5158.
5.14 polycyclic aromatic hydrocarbons (PAHs)
Test according to GB/T 29784.2.
5.15 volatile organic compounds
Test according to the provisions of QB/T5354.
5.16 Formamide content
Test according to the provisions of GB/T 34842.
5.17 Total phthalates
Test according to the provisions of GB/T22048.
6 test rules
6.1 factory inspection.
Item 1 of Table 1, Item 2, Item 14.
6.2 Type test
6.3 Group batch
The same category, the same color, the same material, the same - specification of the product as a batch, the number of each batch does not exceed 50 000 pieces.
6.4 Sampling
Randomly selected samples from each batch of products, the sample size should not be less than 300mmX300mmX8mm, the number of samples should meet the requirements of Chapter 5 in all test methods chapter 5, all the requirements of the test method.
6.5 Judgment rules
If the test results of all items meet the requirements of the physical and chemical performance indicators specified in this document, the physical and chemical performance of the batch of products is judged to be qualified.
If there are unqualified items, the batch of products should be re-sampled in a double retest of unqualified items, double the sample retest results if all meet the physical and chemical performance index requirements, the physical and chemical properties of the batch of products are judged to be qualified, otherwise it is judged to be unqualified.
