Section VI enterprise standard for cold made high-

Section VI enterprise standard for cold made high-strength and fast drying starch adhesive

1 scope

this standard specifies the technical requirements, test methods, inspection rules, marks, packaging and storage of cold made high-strength and fast drying starch adhesive

this standard is applicable to the cold high-strength and fast drying starch adhesive for carton bonding, which is prepared by Changzhou cubic Energy Technology Co., Ltd. through the process of gelatinization, gelatinization and networking. (hereinafter referred to as adhesive)

2 reference standard

the provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the editions shown are valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest versions of the following standards

gb chemical product density, Determination method of relative density

gb determination method of paint viscosity

gb6548 determination method of corrugated board adhesion strength

gb6546 determination method of corrugated board edge compression strength

gb6545 determination method of corrugated board bursting strength

gb packaging, storage and transportation pictorial signs

gb general safety rules for sampling industrial chemical products

gb6544 corrugated board

gb Chemical Reagent Titration Analysis (volumetric analysis) Preparation of standard solution

preparation of preparations and products used in GB chemical reagent test method

3 technical requirements

3.1 appearance properties

white to tan translucent viscous liquid. No mechanical impurities

3.2 physical and chemical indicators are shown in Table 1

Table 1

total alkali content of project indicators, calculated by NaOH,% ≤ 1.8 viscosity, s 40 ± 10 density g/nl 1 09 . 3 adhesion performance index

Table 2

item index adhesion

speed initial adhesion, min ≤ 2.0 full adhesion, min ≤ 15 destruction of fibers, s ≤ 60 adhesion strength, n/cm2 ≥ 6 adhesion strength, n/m in accordance with gb6544 table 5 bursting strength, kPa in accordance with gb6544 table 5 note: raw materials used for corrugated paper should comply with gb6544 article 1.3.1

3.4 usage of bonded corrugated paperboard

the usage of adhesive is not more than 120g per square meter of three-layer corrugated paperboard

4 test method

4.1 inspection of appearance

sensory inspection

4.2 test of physical and chemical indicators

4.2.1 determination of total alkalinity

4.2.1.1 original amount:

titrate the adhesive with phenolphthalein as the indicator and hydrochloric acid standard solution, and the solution turns from red to colorless as the end point

4.2.1.2 reagents and solutions

a. phenolphthalein indicator, 10g/l, prepared according to gb603

b. hydrochloric acid standard solution, C (HCl) = but with the deepening of the research on the preparation process and properties of aerogel, 0.5moi/l

4.2.1.3 test steps

put 10g of sample (accuracy 0.0002g) into a 25ml triangular flask, add 100ml of distilled water, drop 5 drops of phenolphthalein indicator, shake well, and drop hydrochloric acid standard solution to the end point of red disappearance, expressed in X%, and the total alkali is calculated according to Formula 1

x%＝cv0.0400/m × 100...

the concentration of c-salt ester standard solution in the formula, moi/l

v- volume of hydrochloric acid standard solution consumed during titration, ml

m- sample mass, G

0.0400- mass of sodium hydroxide per ml of hydrochloric acid, G

4.2.2 density measurement

according to gb4472

4.2.3 viscosity measurement

according to gb1723 coating-4 viscometer method

4.2.4 determination of bonding time

4.2.4.1 bonded paperboard

take more than 250g/m2 box board paper as the facing paper, cut it into 50mm wide and 1000mm long strips, take 180g/m2 high-strength corrugated paper, cut it into 50mm wide and 1300mm long strips, process it into 50mm wide and 1000mm long corrugated paper according to the production scale of the carton according to the shrinkage rate of 30%, then brush the adhesive according to the amount of no more than 120g per 1m2, and then measure the bonding speed

4.2.4.2 determination of fiber destruction time

when the paperboard is coated with adhesive, it starts to count with a stopwatch. After 20s, it starts to peel by hand, once every 5S, once every time, 50mm long. When there is fuzzing at the bonding place, it is the time of fiber destruction

4.2.4.3 determination of initial adhesion time

after the bonded paperboard destroys the fiber, peel it once every 10s, with a length of 50mm each time. After the bonding place is completely fuzzed, the time from the bonding paperboard to the required time is the initial adhesion time

4.2.4.4 determination of full adhesion time

after the initial adhesion, continue to peel off, 50mm each time, once every 1min, until the bonding place is completely bonded, and the time required to not open the glue from the bonded paperboard to this time is the full adhesion time

4.3 adhesion performance test

4.3.1 adhesion strength test

according to the provisions of gb6548

4.3.2 edge compression strength test

according to the provisions of gb6546

4.3.3 bursting strength test

according to the provisions of gb6545

4.4 adhesive usage provisions

weigh the mass of 2M2 corrugated board on a bench scale with a sensitivity of 5g.Then adjust the specified time on the equipment, start gluing, and quickly weigh out the quality after bonding, Calculate the dosage (x), g/m2 according to formula 2

x = M2 M1/s

where: M2 - total mass after bonding, G

m1- mass before bonding, G

s-corrugated board area, M2

5 inspection rules

5.1 the adhesive must be inspected by the quality inspection department of the manufacturer and attached with a certificate of conformity before leaving the factory

5.2 the delivery inspection is the appearance and viscosity

5.3 type inspection is the whole content of this standard

5.4 type inspection shall be carried out under one of the following circumstances:

a. timing of trial production and finalization of new products

b. normal production shall not be less than once a year

c. when production is resumed after a year of shutdown

d. when there are major changes in raw materials and processes of products, which may affect product quality

e. there is a significant difference between the ex factory inspection and the last type inspection

f. when the quality supervision department puts forward the requirements for type inspection

5.5 the same feeding is a batch

5.6 sampling is random sampling, the total amount of sampling is not less than 1kg, and the average test sample is formed after uniform mixing. Store in the bottle with the grinding cap

5.7 sampling quantity sprocket and chain composition shall be in accordance with table 3

Table 3

content. At the same time, taking into account the number of machinability, the number of samples 345.8 sampling shall be carried out in accordance with the relevant provisions of gb3723

5.9 if one of the inspection results does not conform to the provisions of this standard, double samples should be taken from the products, and re inspection should be carried out with unqualified items. If there is still one unqualified item, this batch of adhesives will be judged as unqualified products

6 marks, packaging, transportation and storage

6.1 marks

the outer packaging of adhesive shall be marked with product name, factory name, address, net quality, executive standard, production date, shelf life and main ingredients. And there should be provisions of gb190

6.2 transportation and storage

the storage and transportation should be covered, rainproof, sunscreen, antifreeze, and the shelf life is half a month