Standard for the hottest kraft paper pressure sens

Kraft paper pressure-sensitive adhesive tape standard

chemical industry standard of the people's Republic of China

kraft paper pressure-sensitive adhesive tape

1 subject content and scope of application

this standard specifies the product classification, technical requirements, test methods, inspection rules, marks, packaging, transportation and storage of kraft paper pressure-sensitive adhesive tape

this standard is only applicable to rolled kraft paper pressure-sensitive adhesive tapes (hereinafter referred to as adhesive tapes) with kraft paper as the substrate, pressure-sensitive adhesive coated on the front and anti sticking material coated on the back. The adhesive tape is mainly used for carton packaging

2 reference standard

gb 455.1 method for determination of paper tear

gb 1214 vernier caliper

gb 2792 method for determination of 180 ° peel strength of pressure-sensitive adhesive tapes

gb 4851 method for determination of adhesion of pressure-sensitive adhesive tapes

gb 4852 method for determination of initial adhesion of pressure-sensitive adhesive tapes

gb 7753 method for determination of tensile properties of pressure-sensitive adhesive tapes

jjg 1 steel ruler

3 product classification

3.1 adhesive tape specification

The specification of adhesive tape shall comply with table 1

and it will damage the fixture: Note: the special specifications are agreed by the supplier and the demander

3.2 adhesive tape code

figure (TP)

kraft paper pressure-sensitive adhesive tape is represented by the code KP (KRAFTPAPER) adhesive tape

3.3 example of adhesive tape marking

4 technical requirements

4.1 appearance

the adhesive tape is not allowed to damage the substrate or tear after unwinding

4.1.1 superior products: both sides are flat, smooth, seamless, deformed, free of glue overflow and joints

4.1.2 first class: both sides are relatively flat, with slight gap, deformation and glue overflow, and one joint is allowed

4.1.3 qualified products: there is no serious gap, deformation and glue overflow, and two joints are allowed for 50m long adhesive tape

4.2 physical properties

the physical properties of adhesive tape shall comply with the provisions of Table 2

5 test method

5.1 measurement of specifications and dimensions

5.1.1 width

use a vernier caliper conforming to the provisions of GB 1214, measure three points roughly equally on the width of the adhesive tape, and take the arithmetic mean value

5.7.2 length and joints

use a steel ruler that conforms to the operation process of JJG tensile testing machine and the classification of sensors of the equipment. Measure the adhesive tape after uncoiling it on the plane and check the number of joints

5.1.3 inner diameter of cylinder core

use a vernier caliper, take three measurements on the inner diameter of cylinder core roughly equally, and calculate its arithmetic mean value

5.2 appearance

5.2.1 appearance shall be checked by visual inspection and hand feeling

5.2.2 unwind the adhesive tape at a speed of about 300mm/s and check whether the substrate is damaged or torn

5.3 180 ° peel strength test

according to the provisions of GB 2792

5.4 damp heat aging test

5.4.1 place the adhesive tape at a temperature of 65 ± 2 ℃; The relative humidity is (80 ± 5)% test chamber, and the test time is 48h

5.4.2 according to Chapter 6 of GB 7753

5.4.3 prepare 5 samples according to the requirements of 6.1-6.2 in GB 2792

5.4.4 measure according to 5.3

5.5 the adhesion test

shall be carried out in accordance with the provisions of GB 4851

5.6 the initial viscosity test

shall be carried out in accordance with the provisions of GB 4852

5.7 tensile strength test

shall be carried out in accordance with the provisions of GB 7753

5.8 tear test

according to GB 455.1

6 inspection rules

6.1 the products must be inspected and passed by the quality inspection department of the manufacturer according to the items specified in this standard, and the certificate of conformity can be issued before leaving the factory

6.2 product grade evaluation

only when the appearance, size and physical properties are qualified or meet the corresponding grade regulations, can it be determined as a product of this grade

6.3 inspection classification

inspection is divided into factory inspection and type inspection

6.3.1 delivery inspection

6.3.1.1 delivery inspection items

a. appearance

b. width, length, inner diameter of cylinder core

c. 180 * peel strength before aging

d. stickiness

e. initial viscosity

f.2. Tensile strength of software function of tensile stripping testing machine

6.3.1.2 factory inspection batch and sampling rules

a. take the shift output or one-time delivery as a batch, and at least 6 boxes of each batch of products shall be randomly selected

b. for appearance and size inspection, at least 10 rolls shall be taken from each box as samples

c. take at least 2 rolls of samples from each box for physical property inspection

6.3.1.3 delivery inspection judgment rules

a. when the number of unqualified rolls exceeds 10% of the total number of sample rolls during dimensional inspection, it is allowed to take another double sample from this batch of products for re inspection of unqualified items. If more than 10% of the sample rolls are still unqualified, this batch of products are unqualified

b. during appearance inspection, if the number of sample rolls that do not meet the corresponding grade exceeds 10% of the total number of sample rolls, it is allowed to take another double sample from this batch of products for re inspection of the unqualified items. If 10% of the sample rolls still do not meet the requirements of the corresponding grade, this batch of products will be degraded or unqualified

c. during the physical property inspection, if any item in one volume does not meet the requirements of the corresponding grade, it is allowed to take double samples for the re inspection of the item. If there is still one volume that does not meet the requirements of the corresponding grade, the batch of products will be degraded or unqualified

6.3.2 type inspection

6.3.2.1 inspect all the technical requirements specified in the standard

6.3.2.2 after damp heat aging: 180 ° peel strength and tear friction shall be inspected at least once a year. During the inspection, two rolls of six boxes shall be randomly selected as samples. If one roll does not meet the requirements of the corresponding grade, another 12 boxes are allowed to be selected, and four rolls of them are selected as samples to retest the two items. If one roll still does not meet the requirements of the corresponding grade, the product will be degraded or unqualified in this period

6.4 acceptance and arbitration

users have the right to require acceptance of product quality according to this standard. When the user has any objection to the product quality, the quality supervision organization agreed by both parties shall arbitrate according to this standard

7 marks, packaging, transportation and storage

7.1 marks

each box of adhesive tape shall have the following marks

a. name and address of production unit

b. adhesive tape marking and product quality grade

c. registered trademark

d. quantity and weight

e. production date or batch number

f. pressure proof, moisture-proof, sunscreen and other signs

8. Term of validity

7.2 packaging

corrugated boxes shall be used for product packaging, and isolation paper shall be placed between the upper and lower layers, with packing list and certificate of conformity attached. Special packing forms and packing requirements shall be in accordance with the provisions of the supply contract

7.3 transportation

products should be handled with care during transportation to prevent extrusion, and should not be mixed with volatile solvents

7.4 storage

7.4.1 products should be stored at -5-40 ℃; The relative humidity is below 80%, and there is no volatile solvent in the warehouse

7.4.2 it is not allowed to stack directly on the wet ground, and the bottom box should not be deformed

7.4.3 the storage period of the product is 1 year from the production date

additional notes:

this standard is proposed by the science and Technology Department of the Ministry of chemical industry of the people's Republic of China

this standard is under the jurisdiction of Shanghai Rubber Products Research Institute

this standard is drafted by Shanghai Rubber Products Research Institute, Beijing stationery factory and Jiangsu Lianshui plastic General Factory

the main drafters of this standard are Shen Jun, Han Feng, shaocongdong and Jin haomu

approved by the Ministry of chemical industry of the people's Republic of China on October 22, 1992 and implemented on July 1, 1993