JB/T 10043-1999 Method for separating abrasives from coated abrasives

JB/T 10043-1999 This standard is a revision of ZB J43 009-90 "Methods for Separating Coated Abrasives". During the revision, only editorial changes were made according to relevant regulations, and the main technical content remained unchanged. This standard specifies the reagents, equipment, instruments, and sample preparation and test procedures used in separating coated abrasives. This standard is applicable to coated abrasives with animal glue, semi-resin, and full resin as binders, but not to sandpaper made of glass sand. This standard was first published on the date of year. JB/T 10043-1999 Methods for Separating Coated Abrasives JB/T10043-1999 Standard download decompression password: www.bzxz.net

JB/T10043—1999
This standard is a revision of ZBJ43009--90 "Methods for Separating Coated Abrasives". This standard is consistent with the technical content of ZBJ43009-90, and has only been re-edited according to relevant regulations. This standard replaces ZBJ43009-90 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Abrasives and Grinding Tools. The drafting unit of this standard: Zhengzhou Abrasives and Grinding Research Institute. The main drafter of this standard: Liu Mei.
This standard was first issued in April 1990.
1 Scope
Standard of the Machinery Industry of the People's Republic of China
Methods for Separating Abrasives from Coated Abrasives
JB/T 10043--1999
ZBJ43009-90
This standard specifies the reagents, equipment, instruments, sample preparation and test procedures used in separating abrasives from coated abrasives. This standard applies to coated abrasives with animal glue, semi-resin and full resin as binders, but not to sandpaper made of glass sand. 2 Reagents
2.1 Water: distilled water or deionized water.
2.2 Hot water: distilled water or deionized water above 50℃. 2.3 Hydrochloric acid: relative density 1.19, chemically pure. 2.4 Sodium hydroxide: chemically pure.
2.5 Ethanol: chemically pure. www.bzxz.net
Sodium hydroxide solution: 50%. Dissolve 50g of sodium hydroxide in water and dilute with water to 100ml. 2.6
2.7 Sodium hydroxide solution: 10%. Dissolve 10g of sodium hydroxide in water and dilute with water to 100mL. 2.8·Sodium hydroxide ethanol mixed solution:
10% sodium hydroxide solution is mixed with an equal volume of ethanol. The mixed solution is prepared in time. 3
Equipment and instruments
3.1 Electric drying oven.
3.2 Resistance wire box-type high temperature furnace.
3.3 Balance: sensitivity 0.1g.
4 Preparation of samples
4.1 Take 240\ and coarse coated abrasive samples, and it should be possible to ensure that 100g of abrasive is separated; take W63 and fine coated abrasive samples, and it should be possible to ensure that 2.5g of abrasive is separated.
4.2 On a smooth paper, cut the coated abrasive sample into strips or blocks of about 25mm×25mm, and put them into a sample bag together with the removed abrasive for later use.
5 Test procedure
5. 1 Separation of abrasive from substrate
5.1.1 Animal glue adhesive coated abrasive
Put the prepared sample in a beaker and immerse it in hot water. When the abrasive falls off, stir it thoroughly with a glass rod, and gently scrape or brush it, then rinse it with hot water to make all the abrasive on the substrate fall off in the beaker, and discard the substrate. 5.1.2 Semi-resin and full-resin binder coated abrasives 5.1.2.1 Burning
Place the prepared sample in porcelain evaporator III, and after complete carbonization, move it into a high-temperature furnace at a temperature of 600°C ± 20°C and burn it until all combustibles become white ash.
5.1.2.2 Alkali boiling
JB/T10043-1999
When the burned sample cools to room temperature, place it in a beaker, immerse it in 50% sodium hydroxide solution, heat and boil for 7~10 minutes, stir it 3~~4 times, and then dilute it with an equal volume of water. 5.1.2.3 Filtration
When the alkali-boiled abrasive completely settles at the bottom of the beaker, place the solution in the beaker in a glass funnel with filter paper (extending 10-13 mm from the edge of the funnel) for filtration.
Add an equal volume of hot water to the beaker with the remaining abrasive, stir thoroughly, and filter the solution after the abrasive completely settles at the bottom of the beaker. Repeat 5 times.
Rinse all the abrasive in the beaker onto the filter paper, wash it 5 times with hot water, and then wash it once with ethanol. Rinse all the abrasive on the filter paper into the beaker with hot water for later use. 5.1.3 Alkyd varnish binder refractory coated abrasives Place the prepared sample in a beaker, immerse it in a sodium hydroxide-ethanol mixed solution, heat and boil until the abrasive falls off, stir it thoroughly with a glass rod, and gently scrape or brush it, then rinse it with a sodium hydroxide-ethanol mixed solution (above 50°C) to make all the abrasive on the substrate fall off in the beaker, and discard the substrate.
5.1.4 Other binder water-resistant coated abrasives that are insoluble in sodium hydroxide-ethanol mixed solution should be carried out according to the method in 5.1.2. 5.2 Acid boiling (except natural corundum abrasives)
In the above beaker, add hydrochloric acid until the binder is dissolved, heat and boil for 7~~10min, stir 3~~4 times, and dilute with hot water. 5.3 Filtration
Wait for the abrasive to completely settle at the bottom of the beaker, and filter the solution in a glass funnel equipped with filter paper (extending 3~6mm from the edge of the funnel). Add an equal volume of hot water to the beaker with the remaining abrasive, stir, wait until the abrasive is completely settled at the bottom of the beaker, filter out the solution, and repeat 5 times. Rinse all the abrasive in the beaker onto the filter paper, wash the abrasive with hot water 4 times, then rinse all the abrasive on the filter paper with hot water onto another filter paper, and rinse the abrasive with ethanol once. 5.4 Burning
Move the filter paper and the abrasive into a drying oven at a temperature of 110℃±5℃ to dry, then put them into porcelain evaporation blood, after complete carbonization, put them into a high-temperature furnace at a temperature of 600℃±20C, and burn until all combustibles turn into ash and the abrasive is loose. 5.5 Weighing
After burning, cool the abrasive to room temperature and weigh it with a balance. 324
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