Method for testing glossiness stability of plastic part of storage batteryThe technical field is as follows:
the invention belongs to the technical field of lead-acid storage batteries, and particularly relates to a method for testing the glossiness stability of a plastic part of a storage battery.
Background art:
the lead-acid storage battery plastic part comprises a storage battery groove, an exhaust valve, a handle and other parts. The basic material of these plastic parts is generally modified polypropylene resin, polyethylene resin, polyvinyl chloride resin or ABS resin. In the manufacturing process of the storage battery or after the storage battery is used for a period of time, the glossiness of partial storage battery grooves is reduced, and the appearance quality of the product is seriously influenced. In the prior art, a method for testing the glossiness stability of a plastic part of a storage battery is not available.
The invention content is as follows:
the invention aims to provide a method for testing the glossiness stability of a storage battery plastic part, which is simple and feasible, has reliable test results and is suitable for testing the glossiness stability of the storage battery plastic part.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for testing the gloss stability of a plastic part of a storage battery comprises the following steps:
step 1: cutting plastic sheets with the same external dimension from the same plastic piece of the storage battery, wherein the number of the cut plastic sheets is even, half of the plastic sheets are test plastic sheets, and the other half of the plastic sheets are comparison plastic sheets, and placing all the plastic sheets at room temperature for drying and storing;
step 2: selecting a glass or plastic container corresponding to the specification of the test plastic sheet, adding a sulfuric acid aqueous solution with the percentage concentration of 15% -40% into the glass or plastic container, and enabling the liquid level height of the sulfuric acid aqueous solution to be between 1/3-2/3 of the container height;
and step 3: heating the sulfuric acid aqueous solution to keep the temperature at 40-60 ℃;
and 4, step 4: immersing the test plastic sheets in the step 1 into a heated sulfuric acid aqueous solution, and standing for 6-24 h;
and 5: taking out the test plastic sheet from the sulfuric acid aqueous solution, washing off the sulfuric acid aqueous solution on the surface by using tap water, and sucking water drops on the surface of the test plastic sheet by using soft cotton cloth or absorbent paper;
step 6: and (3) performing visual inspection under natural light or using a gloss tester to perform comparative test on the gloss of the test plastic sheet soaked in the aqueous solution of persulfuric acid and the gloss of the comparative plastic sheet not soaked in the aqueous solution of persulfuric acid in the step (1), and determining the difference between the gloss of the test plastic sheet and the gloss of the comparative plastic sheet, thereby determining the stability of the gloss of the plastic part of the storage battery.
The invention has the beneficial effects that:
the testing method is simple and easy to implement, adopts the strong acid aqueous solution to corrode at high temperature, has reliable testing result, and is suitable for testing the glossiness stability of the plastic part of the storage battery.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to specific examples.
The plastic part of the storage battery comprises parts such as a storage battery groove, an exhaust valve, a handle and the like, and the minimum specification of the cut test plastic sheet and the cut comparison plastic sheet is 10cm multiplied by 10 cm.
The method for testing the glossiness stability of the black 6-QW-120 type storage battery cell comprises the following steps:
step 1: cutting 6 plastic sheets with the size of 10cm multiplied by 20cm from a black 6-QW-120 type storage battery groove, wherein 3 plastic sheets are test plastic sheets, the other 3 plastic sheets are comparison plastic sheets, and placing all the plastic sheets at room temperature for drying and storing;
step 2: adding a 27 percent sulfuric acid aqueous solution into a circular plastic container with the volume of 9L and the diameter of about 25cm, and keeping the liquid level height of the sulfuric acid aqueous solution at about 20 cm;
and step 3: heating the sulfuric acid aqueous solution by using a water bath kettle to keep the temperature at 55 +/-2 ℃;
and 4, step 4: 3 test plastic sheets in the step 1 are immersed in a heated sulfuric acid aqueous solution and kept stand for 8 hours;
and 5: taking 3 test plastic sheets out of the sulfuric acid aqueous solution, washing off the sulfuric acid aqueous solution on the surface by using tap water, and sucking water drops on the surfaces of the test plastic sheets by using soft cotton cloth;
step 6: testing the glossiness of the 3 test plastic sheets soaked in the aqueous solution of persulfuric acid by using a glossiness tester, wherein the average value of the glossiness is the glossiness of the test plastic sheets soaked in the aqueous solution of persulfuric acid; simultaneously testing the glossiness of the 3 pieces of comparative plastic sheets which are not soaked in the aqueous solution of persulfuric acid, calculating the average value of the glossiness, and determining the glossiness of the comparative plastic sheets which are not soaked in the aqueous solution of persulfuric acid; the gloss of the black 6-QW-120 cell is not stable if the measured gloss of the test plastic sheet is 30 gloss units (Gs) or more below the measured gloss of the comparative plastic sheet, otherwise the gloss is stable.