Some standard content:
QB/T 2303-1997
Pulp paper is an important raw material for dry cell batteries and one of the important factors affecting battery performance. For many years, there has been no unified standard in China to regulate the performance indicators of pulp paper, which has caused certain difficulties in improving the quality of batteries. In order to meet the needs of dry cell battery production in my country, this standard specifies the technical requirements and performance indicators of pulp paper for zinc-manganese dry cell batteries, thereby providing a unified technical basis for the production of pulp paper. At present, there is no international standard for pulp paper. This standard adopts the 1992 corporate standard of Japan Kodo Paper Industry Co., Ltd. in a non-equivalent manner, and also refers to the technical indicators of internationally used pulp paper samples for dry cell batteries. The technical indicator items of the standard are determined according to the actual situation in my country, and the technical indicators such as density and air density in the Japanese standard are removed. The indicators for detecting mercury content, copper content, penetration rate and pulp adhesion are added. In addition to specifying the mercury content of mercury-free pulp paper, the mercury content of mercury pulp paper is also specified to control the upper limit of mercury content. Among them, the penetration rate indicator is formulated according to the standard of Panasonic Corporation of Japan. The main technical indicators determined in the standard are based on the actual level of domestic products and are not lower than the standard level of similar foreign products. This standard is proposed by the Quality Standards Department of China Light Industry Association. This standard is under the jurisdiction of the National Primary Battery Standardization Center. Drafting units of this standard: Chemical Power Source Research Institute of China Light Industry Association, Shanghai Songjiang Chemical Plant, Changzhou Electric Material Factory, Liaoyuan Photosensitive Materials Main drafters of this standard: Liu E, Xie Xiaochao, Dong Mingguang, Wan Minghui. 454
1 Scope
Light Industry Industry Standard of the People's Republic of China
Pulp Paper
QB/T2303—1997
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of pulp paper for zinc-manganese dry batteries.
This standard applies to pulp paper made by coating with K8 cable paper or single-density base paper and double-density base paper for batteries, which is used in the zinc-manganese dry battery industry.
2 Cited standards
The clauses contained in the following standards constitute the clauses of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T450—1989 Paper and paperboard sample collection GB/T 451.2-1989 Paper and paperboard quantitative determination method GB/T451.3-1989 Paper and paperboard thickness determination method GB/T452.1-1989 Paper and paperboard longitudinal and transverse determination method GB/T462—1989 Paper and paperboard moisture determination method GB/T1545.2—1989 Paper, paperboard and pulp water extract pH determination method GB/T2828—1987 Batch inspection counting sampling procedure and sampling table (applicable to continuous batch inspection) Periodic inspection counting sampling procedure and sampling table (applicable to production process stability inspection) GB/T 2829--1987
GB/T8943.1—1988 Determination of copper content in pulp, paper and paperboard Determination of iron content in pulp, paper and paperboard GB/T8943.2—1988
GB/T10739-—1989 Standard atmosphere for handling and testing of pulp, paper and paperboard 3 Product classification
3.1 Product type
Pulp paper is divided into two types: ammonium chloride type and zinc chloride type for batteries. 3.2 Product model
It is named according to the type of electrolyte applicable to the pulp paper, whether it contains mercury, single-sided or double-sided coating amount, and base paper thickness. Example 1
15/15-8
Base paper thickness 0.08mm
Double-sided coating weight 15g/m2 each
Ammonium chloride type
Approved by China Light Industry Federation on June 20, 1997
Implemented on April 1, 1998
4. Technical requirements
4.1 Appearance
QB/T 2303--1997
Base paper thickness 0.08mm (double density)
Single-sided coating weight 30g/m
Zinc chloride type
The coating surface of pulp paper should be flat and clean, with uniform coating, no bumps, cracks, holes, etc., neat cutting edges and flat end faces. 4.2 Base paper thickness
Tested according to 5.4, the base paper thickness should comply with the requirements of Table 1. Table 1
Base paper thickness
Coating amount
Water content
Iron content
Copper content
Mercury content
Liquid absorption rate
Permeation speed
Tensile strength
Physical and chemical index technical requirements
min/0.05 mL
N/15mm
Technical requirements
0. 08±0.005,0.07±0. 005
40±4，30±3，20±2
≤1.7≤30×10-6(mercury-free paper)
2. 0~～30. 0
4.3Coating amount
Tested according to 5.5, the coating amount should comply with the requirements of Table 1. The pulp paper can be coated on one side or on both sides. When the double-sided coating is used, the coating amount of the outer layer should not be less than that of the inner layer.
4.4 Water content
Tested according to 5.6, the water content should comply with the provisions of Table 1. 4.5 Iron content
Tested according to 5.7, the iron content should comply with the provisions of Table 1. 4.6 Copper content
Tested according to 5.8, the copper content should comply with the provisions of Table 1. 4.7 Mercury content
Tested according to 5.9, the mercury content should comply with the provisions of Table 1. 4.8 pH value
Tested according to 5.10, the pH value should comply with the provisions of Table 1. 4.9 Liquid absorption
Tested according to 5.11, the liquid absorption should comply with the provisions of Table 1. 4.10 Penetration rate
QB/T 2303
Tested according to 5.12, the penetration rate should comply with the provisions of Table 1. 4.11 Tensile strength
Tested according to 5.13, the tensile strength shall comply with the provisions of Table 1. 4.12 Pulp adhesion
Fold the pulp layer paper in half and unfold it, and there should be no powder falling off. 4.13 Slitting specifications
Tested according to 5.14, the slitting specifications shall comply with the provisions of Table 2. 1997
Slitting specifications
Slitting width, mm
Outer diameter of paper tray. mm
380±5
Note: Other specifications can be negotiated by the supply and demand parties. 5 Test methods
5.1 Sampling and processing
Inner diameter of paper core, mm
Number of joints
(within 300m)
Sampling shall be carried out according to the provisions of GB/T450 and processing shall be carried out according to the provisions of Chapter 5 of GB/T10739. Scope of application
R1 battery
R03 battery
R6 battery
R14 battery
R20 battery
5.2 Test conditions
Under the conditions of temperature (20±5)C and relative humidity 65%±2%, select the pulp layer paper sample that has been treated and has reached a balanced state for testing.
5.3 Appearance
Visual inspection, the uniformity of the pulp layer paper shall be inspected with a magnifying glass (or microscope) of more than 5 times. 5.4 Thickness of base paper
Measured according to the provisions of (GB/T451.3,
5.5 Coating amount
Measured according to the provisions of GB/T451.2 for the basis paper and pulp layer paper of the same batch. Coating amount-Pulp layer paper quantity-Base paper quantity 5.6 Water content
Measured according to the provisions of GB/T462.
5.7 Iron content
Measured according to the provisions of GB/T8943.2.
5.8 Copper content
Measured according to the provisions of GB/T8943.1.| |tt||5.9 Mercury content
5.9.1 Method summary
The pulp paper is decomposed with nitric acid, filtered, and part of the filtrate is taken to a mercury vapor generator. Stannous chloride is added to reduce the mercury ions to metallic mercury. The mercury vapor is collected in the absorption tube of the mercury meter (or atomic absorption spectrophotometer). Mercury atoms have characteristic absorption of the resonance line with a wavelength of 253.7nm, and the absorbance is measured by this.
5.9.2 Reagents and instruments
5.9.2.1 Nitric acid: 1+1 and 1+99.
5.9.2.2 Hydrochloric acid; 1+1.
QB/T 2303—1997
5.9.2.3 Stannous chloride solution (200 g/L): Weigh 20 g of stannous chloride (anhydrous), dissolve it in an appropriate amount of hydrochloric acid (5.9.2.2) with a concentration of 1+1, heat it slightly to dissolve it completely, dilute it with water to 100 mL, and mix it. 5.9.2.4 Mercury storage solution (0.1000mgHg/mL): Accurately weigh 0.1353g of mercuric chloride (HgCl2), dissolve it in an appropriate amount of water, add it to 66ml of 1+1 nitric acid, transfer it to a 1000mL volumetric flask, dilute it to the mark with water, and mix it. 5.9.2.5 Mercury standard solution (0.10μgHg/mL): Take 1.00mL of mercury storage solution (5.9.2.4) in a 1000mL volumetric flask, add 3mL of 50g/L potassium dichromate solution and 66mL of nitric acid, dilute it to the mark with water, and mix it. 5.9.2.6 Mercury analyzer or various atomic absorption spectrophotometers. 5.9.3 Analysis steps
5.9.3.1 Sample
Cut a number of pulp paper samples smaller than 3cm×3cm and weigh them. Weigh 0.2g of the paper with mercury pulp, accurate to 0.001g; weigh 0.5g of the paper without mercury pulp, accurate to 0.001g.
5.9.3.2 Blank test
Perform a blank test together with the sample.
5.9.3.3 Preparation of test solution
Place the sample (5.9.3.1) in a 125mL conical beaker, add 10mL of 1+1 nitric acid (5.9.2.1), cover with blood on the surface, heat to a slight boil and keep for 10min before removing. Wash the surface blood with water, filter with a glass frosted funnel, collect the filtrate in a 100mL volumetric flask, wash the beaker 3 times with 1+99 nitric acid (5.9.2.1), wash the funnel and residue 5 times, and also place them in a 100mL volumetric flask. Dilute with water to the mark and shake well.
5.9.3.4 Determination of test solution
Accurately take 0.01mL (with mercury slurry paper) or 1mL (without mercury slurry paper) of the test solution (5.9.3.3) and place it in a 25mL mercury vapor generator bottle. When the test solution (5.9.3.3) is less than 0.5mL, add 5 drops of 1+1 nitric acid (5.9.2.1), dilute with water to about 9mL, add 1mL of stannous chloride solution (5.9.2.3), quickly cover the mercury vapor generator bottle stopper, and read the maximum absorbance. 5.9.4 Working curve drawing
5.9.4.1 Take 0.00, 0.05, 0.10, 0.20, 0.30mL of the mercury standard solution (5.9.2.5) and place it in a set of 25mL mercury vapor generating bottles, add 5 drops of 1+1 nitric acid (5.9.2.1) and 1mL of stannous fluoride solution (5.9.2.3), quickly cover the stopper of the mercury vapor generating bottle, and read the maximum absorbance.
5.9.4.2 Draw the working curve with the mercury concentration as the horizontal axis and the absorbance value of the zero concentration solution in the standard series minus the absorbance as the vertical axis. 5.9.5 Calculation and expression of analysis results
Calculate the percentage of mercury according to formula (1):
Hg(%)=GxV1000×100
Wherein: C--the corresponding mercury concentration is obtained from the working curve after deducting the absorbance of the blank test from the absorbance of the sample, ug; G--the mass of the sample, mg;
V1--the total volume of the sample solution, mL;
V,--the volume of the sample solution taken, mL. 5.10 pH value
Determine according to the provisions of GB/T1545.2.
5.11 Liquid absorption rate
5.11.1 Summary of the method
The pulp paper is directly immersed in the standard electrolyte of zinc-manganese dry batteries, and its liquid absorption rate is determined based on the mass of the pulp paper before and after immersion. 458
（1）
5.11.2 Reagent
QB/T 2303--1997
It is composed of 20% ammonium chloride, 15% zinc chloride, and 65% distilled water. 5.11.3 Analysis steps
5.11.3.1 Sample
Cut a 5cm×5cm pulp paper sample and weigh it to the nearest 0.01g. 5.11.3.2 Determination
Put the sample (5.11.3.1) in the reagent (5.11.2) solution and soak it for (10±1)min. Then, use a small forceps to hold the end of the sample and take out the sample. Then, place it on a glass plate inclined at 45° for 3min. After removing the dripping liquid on the sample, weigh it again to the nearest 0.01g. Determine the pulp paper sample three times in this way and take the average value. 5.11.4 Calculation and expression of analysis results
Calculate the liquid absorption rate according to formula (2):
Wz-Wi×100
Liquid absorption rate (%) =
The mass of the sample before immersion, g;
W—
The mass of the sample after immersion, g.
5.12 Penetration rate
5.12.1 Sample
Cut a 10 cm×10 cm pulp layer paper as a sample. W.
（2）
5.12.2 Determination
Place the sample (5.12.1) on a horizontal pad, with the base paper facing upward and the coating facing downward for single-sided coated paper; for double-sided coated paper, the paper surface can be positioned at any position. Use a dropper to drop 0.05 mL of pure water onto the center of the base paper surface from a height of 15 mm, and measure the time from when the water drops onto the paper to when it is completely absorbed. The penetration rate of double-sided coated paper is slower than that of single-sided coated paper. The measurement results are expressed in min/0.05 mL. 5.13 Tensile Strength
5.13.1 Equipment
A high-precision oscillating tensile tester with a clamp spacing of 1800 mm and a maximum load of 98 N (10 kg). 5.13.2 Sample
Measure the longitudinal and transverse directions of the paper according to GB/T452.1, and then cut a 15mm×200mm pulp layer paper in the longitudinal direction of the paper as a sample. 5.13.3 Measurement
Place the sample (5.13.2) on the tensile tester (5.13.1), pull the sample at a speed of about 200mm per minute, and break it within 5~~15s. Measure it 5 times and take the average value. The measurement result is expressed in N/15 mm.
5.14 Slitting specifications
Measure with a ruler with an accuracy of 1mm, accurate to the first decimal place. 6 Inspection rules
6.1 Product inspection is divided into delivery inspection and routine inspection. 6.2 The product should be inspected by the quality inspection department of the manufacturer in accordance with the inspection method specified in this standard, and ensure that the products leaving the factory meet the requirements of this standard.
6.3 Products should be accompanied by a certificate of conformity when leaving the factory.
6.4 The manufacturer considers the output of each continuous production (in terms of the number of cut discs) as a batch. The user considers the delivery quantity (in terms of discs) as a batch. 6.5 Delivery inspection
6.5.1 Delivery inspection shall be carried out in accordance with the normal inspection and one-time sampling plan of GB/T2828. 459
QB/T2303-1997
6.5.2 Delivery inspection items, sequence, inspection level and qualified quality level shall comply with the provisions of Table 3. Certain inspection items may also be cancelled by negotiation between the supply and demand parties.
Table 3 Acceptance inspection items, sequence, inspection level and qualified quality level Sequence
Coating amount
Water content
Slurry adhesion
Slitting specifications
Technical requirements Clause
Test method Clause
4, 12Www.bzxZ.net
Inspection level
Qualified quality level
6.5.3 If a certain indicator is found to be unqualified, a strict inspection sampling plan must be adopted. If it is still unqualified, the batch of products will be treated as unqualified.
6.6 Routine inspection
Routine inspection shall be carried out according to the one-time sampling plan of GB/T2829. 6.6. 1
Inspection samples must be randomly selected from the batches that have passed the acceptance inspection. The items, sequence, discrimination level and unqualified quality level of routine inspection shall comply with the provisions of Table 4. Table 4 Items, sequence, discrimination level and unqualified quality level of routine inspection No.
Base paper thickness
Coating amount
Water content
Iron content
Element content
Liquid absorption rate
Permeation speed
Tensile strength
Slurry adhesion
Slitting specifications
Marking, packaging, transportation, storage
Technical requirements Clause
7.1 Marking
, 7.1.1 The outer packaging should be clearly marked with the following contents: a) Product name and model;
b) Manufacturer name and address;
c) Production date and batch number;
Test method Clause
Discrimination level
Unqualified quality level
A.=.0 R 1
d) Net weight and volume;
e) Fire protection, sun protection, moisture protection and damage protection; f) Standard number.
QB/T2303-.·1997
Each batch of products should have a quality certificate, the contents of which include: 7. 1.2
a) Product name and model;
b) Manufacturer and address;
c) Production date and batch number;
d) Test results of various technical requirements specified in this standard;e) Base paper tightness, air permeability, capillary absorption height, quantitative and uniformity, and swelling index of paste; () Stamp of quality inspection department;
g) Number of this standard.
7.2 Packaging
Products are packaged in a certain number of trays and moisture-proof packaging is adopted. The inner packaging is made of kraft paper and then put into plastic bags. The outer packaging is fiber barrels with sealed lids or other feasible packaging.
7.3 Transportation and storage
During transportation and storage, it is strictly forbidden to expose to the sun, rain, high temperature and high humidity, and avoid collision and heavy pressure. The storage place should be clean, dry and ventilated. It is strictly forbidden to store it in a room with acid, alkali or other chemicals and radioactive substances that can emit harmful gases.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.