Some standard content:
Light Industry Industry Standard of the People's Republic of China
Polyethylene Color Masterbatch
Subject Content and Scope of Application
QB1648--92
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of polyethylene color masterbatch (hereinafter referred to as masterbatch).
This standard applies to masterbatch made of polyethylene resin and pigment as the main raw materials and extruded and granulated. 2 Reference Standards
Gray Scale for Evaluation of Color Change
GB 251
Gray Scale for Evaluation of Staining
Method for Measurement of Object Color
GB 3979
GB7921 average color space and color difference formula
3 Product classification
3.1 Product code
Masterbatch dilution ratio
Color code defined by each factory
Hue category code named by color system
1 (yellow), 2 (orange), 3 (red) 4 (purple), 5 (blue), 6 (green) 7 (brown), 8 (white), 9 (gray) 0 (black)
Carrier code
Example: E416-25 polyethylene purple No. 16 masterbatch, the dilution ratio is 25. 3.2 Product specifications
The size of the masterbatch particles is similar to the size of the ethylene particles used. 4 Technical requirements
4.1 Appearance
The masterbatch should be even-sized particles, with a smooth surface and uniform color. No more than two connected particles are allowed, and the amount of two connected particles is not more than 0.2%.
Approved by the Ministry of Light Industry of the People's Republic of China on January 15, 1993, 662
Regular control
Implemented on September 1, 1993
The physical properties should comply with the requirements of Table 1.
Test method
QB 1648—92
Color strength, %
Total color difference (CIELAB)
Water content, %
Migration resistance, grade
Heat resistance, grade
Permitted number of color points
pieces/m2
>0.6~1.0 mm
0. 3~0. 6 mm
Dispersion, piece/(100 mm×100mm)
95~105
Not allowed
Not allowed
5.1 Appearance
Randomly select 200 samples from the sample, inspect visually under natural light and calculate the amount of connected particles by weighing with a balance with a sensitivity of 0.1g. 5.2 Tinting Strength
5.2.1 Preparation of Standard Color Plates
Prepare standard color plates by injection molding according to the requirements of the color plates specified in the classification. Qualified products
95~105
Not allowed
5.2.2 Preparation of Sample Color Plates
Take a sample masterbatch and use the same dilution ratio, method, material and process as the standard color plate to make a sample color plate. Then compare the standard color plate with the sample color plate. If the color of the sample color plate is darker than the standard color plate, increase the amount of polyethylene resin. Otherwise, reduce the amount of polyethylene resin until the colors of the two are basically the same. 5.2.3 Calculation
Calculate the tinting strength according to formula (1).
Where: S-
Coloring strength, %;
-Dilution ratio of standard color plate;
-Dilution ratio of sample color plate when the color is basically the same as that of standard color plate. 5.3 Total color difference
5.3.1 Instrument
Colorimeter in accordance with GB3979.
5.3.2 Preparation of standard color plate
Prepare standard color plate by injection molding according to the provisions of 3.1. ·(1)
5.3.3 Preparation of sample color plate
Take a sample masterbatch with the same dilution ratio, method, material and process as the standard color plate, and make the sample color plate by injection molding. 5.3.4 Test steps
Place the sample color plate and the standard color plate in the colorimeter respectively, measure the three stimulus values X, Y1, Z1X2, Y2, Z2, and calculate the total color difference according to formula (9) in GB7921.
5.4 Water content
Marking degree network Aw.bzo
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5.4.1 Instruments
a. Weighing bottle;
b. Constant temperature oven,
c. Analytical balance with a sensitivity of 0.1 mg;
d. Desiccator.
5.4.2 Test steps
QB1648-92
In a constant-weight weighing bottle, evenly spread the masterbatch, weigh 5g of the sample on the analytical balance, accurate to 0.1mg, put it in a constant-temperature oven at (95±2)℃ and dry it for 2h, move it to a dryer, cool it to room temperature and weigh it, then put it in a constant-temperature oven and dry it for more than 30min, cool it, and weigh it to constant weight.
5.4.3 The test results are calculated according to formula (2).
Where: A—-water content,%;
Wi—mass of sample before drying, g;
W2---mass of sample after drying, g.
Wl- Wz× 100
For the test results, take the arithmetic mean of the results of two parallel tests, with two significant figures. 5.5 Resistance to migration
5.5.1 Apparatus
a. Constant temperature oven;
b. Two glass plates 75mm×75mm×2mm;
c. White filter paper 75mm×75mm;
d. 100g code
5.5.2 Preparation of sample
one.
5.5.2.1 Preparation of masterbatch sample
According to the color plate requirements specified in the classification, use the blow molding method to prepare a film with a thickness of (0.08±0.01) mm and set it aside. 5.5.2.2 Preparation of polyvinyl chloride test piece
Use molding or calendaring to obtain a clean and colorless polyvinyl chloride test piece with a specification of 75mm×75mm×1mm. The formula is as follows: polyvinyl chloride (suspension polymerization), 100 parts by weight; dioctyl phthalate, 65 parts by weight;
calcium stearate, 1 part by weight.
5.5.3 Test steps
Put a 50mm×50mm masterbatch sample on a polyvinyl chloride test piece, cover it with a 75mm×75mm dry white filter paper, and put it between two glass sheets so that the masterbatch sample and the polyvinyl chloride test piece are in close contact. Then put the assembly into an oven at (105±5)°C. After 2 hours, take out the assembly from the oven and separate the parts. Check the polyvinyl chloride test piece and determine the degree of staining according to GB251. bzxZ.net
5.6 Heat resistance
5.6.1 Instrument
a. Constant temperature oven;
b. Two 5 mm thick flat plates.
5.6.2 Test steps
Take two sample color plates (see 5.3.3), place one of them between two glass plates, put it in a (180 ± 2) ℃ oven, take it out after 20 minutes, compare it with a sample color plate that has not been put into the oven, and determine the degree of discoloration according to GB250. 5.7 Dispersion
Marking degree thin network AW.bo
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5.7.1 Instrument
a. Optical microscope or magnifying glass;
b, 100 mmX100 mm frame plate.
5.7.2 Sample preparation
For sample preparation, see 5.5.2.1. Take 1m2 for standby use. QB164892
5.7.3 Test steps
Under light transmission conditions, use a microscope or magnifying glass to observe the size and number of color dots in the film, and use a frame plate to check the dispersion. 6 Inspection rules
6.1 Batching and sampling
6.1.1 Masterbatches with the same formula, color and process are grouped as one batch, and the quantity of each batch shall not exceed 10t. 6.1.2 Sampling
At least 500g of masterbatch shall be randomly selected from 5 packages. 6.2 Factory inspection
The factory inspection items are item 6 in 4.1 and 4.2. 6.3 Type Inspection
Type inspection should be conducted in any of the following situations: a. Pre-production and identification of new products or old products transferred to the factory for production; b. After formal production, if there are major changes in structure, materials, and processes that may affect product performance; c. During normal production, inspection should be conducted every six months; d. When the product is stopped for six months and then resumed; e. When there is a significant difference between the factory inspection results and the last type inspection; and... When the national quality supervision agency proposes a requirement for type inspection. 6.4 Judgment rules
If there are unqualified items in the inspected samples, double sampling should be taken from the original batch again, and the unqualified items should be re-inspected. If there are still unqualified items, the batch is unqualified.
7 Marking, packaging, transportation, storage
7.1 Marking
Small packages should have a certificate of conformity, stating the product name, product code, quality grade, trademark, standard number, manufacturer name, address, quantity, production date and inspector code, and large packages should indicate the product name, manufacturer name, address and quantity. 7.2 Packaging
Small packages should use plastic bags or other sealed containers, and large packages should use plastic woven bags or other packaging materials. 7.3 Transportation
During transportation, the products should be loaded and unloaded gently, avoid sun and rain, and ensure the integrity of the packaging. 7.4 Storage
The products should be placed in a ventilated, dry and clean warehouse, away from heat sources. The storage period shall not exceed two years from the date of production. Additional Notes:
This standard was proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Plastic Products Standardization Center. This standard was drafted by Shanghai Plastic Products Factory No. 21. The main drafters of this standard are Chen Debiao, Jiang Linrong, Liu Hairong, and Xu Liangcai.
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