Corrugated base paper GB 13023-9 1

Corrugated sandwich base paper

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1 Subject content and scope of application

This standard specifies the technical specifications of corrugated medium.

This standard is applicable to corrugated base paper for manufacturing corrugated board.

2 reference standard

GB45 1. 1 Paper and board-Determination of size and skewness

GB45 1.2 Method for determination of basis weight of paper and board

GB45 1.3 determination of paper and board thickness

GB453 Method for determination of tensile strength of paper and paperboard (constant speed loading method)

GB462 Method for determination of moisture in paper and paperboard

GB2679.8 determination of ring compressive strength of paperboard

GB2828 Sampling procedure and table for batch inspection counting (applicable to continuous batch inspection)

GB 10324 packaging and marking of paper.

GB 10739 Standard atmosphere for sample treatment and testing of pulp, paper and paperboard.

3 product classification

3. 1 Corrugated base paper is divided into four grades according to quality: A, B, C and D.

3.2 Corrugated base paper is divided into flat paper and web paper.

3.3 The specifications of corrugated base paper can be stipulated in the order contract, and the deviation of web size should not exceed 80mm, the deviation of open width size should not exceed 5mm, and the skew should not exceed 5mm.

4 technical requirements

4. The technical indexes of 1 corrugated base paper must meet the requirements of Table1.

4. 1. 1 According to the agreement between the supplier and the buyer, other quantitative corrugated base paper can be produced. Its physical properties refer to the corresponding grades in table 1.

Table 1

Index name unit specification

A B C D

Quantitative g/m2112.06.0160.08.0

127.0 6.0 180.0 9.0

140.0 7.0 200.0 10.0

The air tightness is not less than g/cm3 0.50 0.45.

Transverse ring pressure index

1 12g/m2 not less than

127140g/m2 not less than

160-200g/m2 is not less than n? Male/female 7. 10

7.70

9.20 5.50

6.30

7.70 3.80

4.40

5.50 3.30

3.50

3.50

The longitudinal fracture length is not less than km 4.30 3.75 2.70 2. 15.

Delivery moisture% 8.0 2.0 8.0+3.0-2.0 9.0+3.0-2.0

4. 1.2 According to the agreement between the supplier and the demander, the sized corrugated base paper can be produced.

4.2 Corrugated base paper is not allowed to be layered without external force.

4.3 The fiber structure of corrugated base paper should be uniform and the paper thickness should be consistent.

4.4 Corrugated base paper should be smooth, and there should be no passbook, holes, hard sundries and other influential paper defects.

4.5 The trimming of corrugated base paper should be neat, and cracks, missing corners and burrs are not allowed.

4.6 The broken net shall be firmly bonded with adhesive tape paper, and the number of joints of each drum shall not exceed 1 drum, and the number of joints of B, C and D shall not exceed 3, with obvious signs.

4.7 The diameter of the web is 800- 1000mm, or as stipulated in the order contract.

4.8 The core of the roll paper is not allowed to have a flat core, and the end face of the roll paper should be flat, and the zigzag and concave-convex surface formed should not exceed 20 mm ..

4.9. Grade C and D can be classified as Class II products under the following circumstances, but no more than two products at the same time.

4.9. 1 Timing exceeds the allowable error by 2%.

4.9.2 The transverse confining pressure index is less than 10%.

4.9.3 The longitudinal fracture length is less than 10%.

5 test method

5. 1 The quantification and compactness were determined according to GB45 1.2 and GB45 1.3 respectively.

5.2 transverse confining pressure index: the transverse confining pressure strength is determined according to GB2679.8, and the transverse confining pressure index is n? M/g means.

r=R/W

Where: r-transverse confining pressure index, n? Meter/gram;

R—— transverse confining pressure strength, n/m;

W- quantitative, g/m2.

5.3 Longitudinal fracture length: measured according to GB453.

5.4 Moisture: determined according to GB462.

6 inspection rules

6. 1 should be delivered in one batch, but not more than 50 tons.

6.2 The manufacturer shall ensure that the corrugated base paper produced meets the requirements of this standard, and each piece of paper shall be accompanied by a certificate of conformity upon delivery.

6.3 In the process of acceptance, the consignee should first check the outer packaging, and then take samples from it for inspection. Sampling inspection shall be carried out in accordance with GB2828, and the sample unit shall be rolls or pieces. See Table 2 for the sampling scheme.

Table 2

General inspection grade 1 unqualified classification of secondary sampling scheme for batch normal inspection

roll

(piece) The sample size is Class B nonconforming product.

Acceptable quality standards

Acrc unqualified products

Acceptable quality standards

Acrc class unqualified, c class unqualified.

1-25 2 0 1 transverse confining pressure index

Quantitative analysis of longitudinal crack length

moisture

unit weight

Contact/get in touch

three

3(6) 02

12

26- 150 5

5( 10) 02

12 03

34

15 1-280 8

8( 16) 03

34 13

45

6.4 If the sampling inspection results are inconsistent with the provisions of this standard, a written opinion shall be submitted to the direct supplier within three months after the arrival of the goods, which shall be resolved through consultation between the supply and demand sides.

7 Marking, packaging, transportation and storage

7. 1 Packaging shall be carried out in accordance with GB 10342, with the following supplements.

7. 1. 1 The outer five-layer corrugated base paper is the outer packaging, the width is within 1600 mm, the two ends are tied tightly with polypropylene plastic tape or iron sheet, and the middle of the width exceeds 1600 mm is added with one layer. ..

7. 1.2 Flat paper is clamped with two pieces of checkerboard or bamboo plywood, and tied into pieces with iron sheets or lead wires. The vertical and horizontal directions of each piece of paper should be consistent. Draw an arrow on the packaging skin to indicate the vertical direction of the paper.

7.2 Corrugated base paper should be properly kept to prevent from being affected with damp.

7.3 Corrugated base paper should be transported by clean means with cover.

7.4 Don't throw paper from a height.

Additional notes:

This standard was put forward by the Ministry of Light Industry of People's Republic of China (PRC).

This standard is under the jurisdiction of the Paper Industry Research Institute of the Ministry of Light Industry.

This standard was drafted by Suzhou Hongye Paper Mill, Tianjin Paperboard Mill and Tianjin Paper Research Institute.

The main drafters of this standard are: Jiang Peiyuan, Wang,, and Hou.

Since the implementation of this standard, the original ministerial standard QB548-8 1 Corrugated Base Paper issued by the Ministry of Light Industry of People's Republic of China (PRC) and China has become invalid.

This standard refers to the Japanese standard JISP3904- 1985 corrugated paper.