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GB/T 19536-2015 English PDF (GBT19536-2015)

GB/T 19536-2015 English PDF (GBT19536-2015)

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GB/T 19536-2015: Plywood for container flooring

This Standard specifies the terms and definitions, classification, requirements, test methods, inspection rules and marking, packaging, transportation and storage of plywood for container flooring.
GB/T 19536-2015
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 79.060.10
B 70
Replacing GB/T 19536-2004
Plywood for Container Flooring
ISSUED ON. JULY 3, 2015
IMPLEMENTED ON. NOVEMBER 2, 2015
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Application Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 5
4 Classification... 6
5 Requirements ... 6
6 Test Methods ... 11
7 Inspection Rules ... 16
8 Marking, Packaging, Transportation and Storage ... 19
Annex A (Informative) Simulated Container Underframe for Test ... 20
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB/T 19536-2004, Plywood for container flooring. Compared with GB/T 19536-2004, the main differences of this Standard are as follows. -- it changes application scope and adds bamboo-wood plywood for container flooring and faced plywood for container flooring;
-- it adds categories;
-- it changes and supplements definitions;
-- it changes warping values in dimensions and dimensional deviations;
-- it changes appearance quality requirements;
-- it adds indexes and test methods for static bending strength, elasticity modulus of bamboo-wood plywood for container flooring;
-- it cancels indexes and test methods for bonding strength;
-- it adds indexes and test methods for short-span shear force;
-- it adds indexes and test methods for concentrated load; and
-- it adds strength requirements and test methods for container flooring. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuer of this document shall not be held responsible for identifying any or all such patent rights.
This Standard was proposed by the State Forestry Administration.
This Standard shall be under the jurisdiction of the National Technical Committee 198 on Wood-based Panels Standardization of China (SAC/TC 198).
The drafting organizations of this Standard. Chinese Academy of Forestry Research Institute of Wood Industry, CIMC Container Holding Co., Ltd., Xinhui Zhongji Wood Co., Ltd., Maoyou Timber Co., Ltd., Foshan Zhengsen Wood Co., Ltd., Jiangsu Happy Wood Group Co., Ltd., Langfang Sanli Wood Co., Ltd., Deqing Sanke Insect-resist Agents Co., Ltd., Huzhou Fenghe Glue Technology Co., Ltd., Zhejiang Yunfeng Greeneo Co., Ltd. and Nanjing Forestry University.
The main drafters of this Standard. Yang Fan, Hu Shenghui, He Sidong, Tao Renzhong, Cheng Jilie, Huang Qingbang, Wang Daojiang, Huang Anmin, Lv Bin, Wang Ximing, Jin Jing, Cai Jiankun, Kou Fuping, Gu Shuixiang, Xu Bin and Jia Dongyu. Plywood for Container Flooring
1 Application Scope
This Standard specifies the terms and definitions, classification, requirements, test methods, inspection rules and marking, packaging, transportation and storage of plywood for container flooring.
This Standard applies to plain or faced plywood which is generally used for container flooring, made of wood veneers or bamboo-based elements (such as bamboo curtain, bamboo mat and so on) and resistant to insects, corrosion and weathering. 2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced document (including any amendments) applies to this Standard.
GB/T 1413-2008, Series 1 freight Containers ?€? Classification, Dimensions and Ratings
GB/T 2828.1-2012, Sampling Procedures for Inspection by Attributes ?€? Part 1. Sampling Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection
GB/T 9846.2-2004, Plywood ?€? Part 2. Tolerances on Dimensions
GB/T 17657, Test Methods of Evaluating the Properties of Wood-based Panels and Surface Decorated Wood-based Panels
GB/T 18259-2009, Terms of Wood-based Panel and Its Surface Decoration
GB/T 19367-2009, Wood-based Panels ?€? Determination of Dimensions of Panels ISO 1496-1.2013, Series 1 Freight Containers ?€? Specification and Testing ?€? Part 1. General Cargo Containers for General Purposes
3 Terms and Definitions
Those defined in GB/T 18259-2009 and the following terms and definitions apply to this document.
3.1
plywood for container flooring
plywood which is generally used for container flooring, made of wood veneers or bamboo-based elements (such as bamboo curtains, bamboo mats and so on) and resistant to insects, corrosion and weathering
3.2
full-wood plywood for container flooring
plywood for container flooring, which is made by bonding wood veneers, including plain plywood and faced plywood
3.3
bamboo-wood plywood for container flooring
plywood for container flooring, which is made by bonding bamboo elements and wood elements, such as bamboo curtains and bamboo mats, including plain bamboo-wood composite plywood and faced bamboo-wood composite plywood
4 Classification
4.1 It is divided into the following categories in accordance with materials. a) full-wood plywood for container flooring; and
b) bamboo-wood composite plywood for container flooring.
4.2 It is divided into the following categories in accordance with surface treatment. a) plain plywood for container flooring; and
b) faced plywood for container flooring.
5 Requirements
5.1 Structure
5.1.1 Full-wood plywood for container flooring
5.1.1.1 Face veneers shall be of full size with the tight surface facing outwards. The vertical jointing of inner veneers shall not be more than 50% of the total number of plies and shall not be more than 30 cm apart at the same location.
5.1.1.2 The veneers of symmetric plies on both sides of central ply shall be of the same thickness, the same tree species or tree species of similar mechanical properties; the grain direction shall also be the same.
As specified in the density measurement of GB/T 17657. The density of sample to be tested is the arithmetic mean value of the densities of three test pieces, accurate to 0.01 g/cm3.
6.3.3 Water content test
As specified in the water content measurement of GB/T 17657. The water content of sample to be tested is the arithmetic mean value of the densities of three test pieces, accurate to 0.1%.
6.3.4 Static bending strength and elasticity modulus test
Carry out the test as specified in the ?€?three-point bending?€? provisions for static bending strength and elasticity modulus measurement in GB/T 17657.
The longitudinal and lateral static bending strength of sample to be tested is the arithmetic mean value of the static bending strengths of three test pieces, accurate to 0.1 MPa.
The longitudinal and lateral elasticity modulus of sample to be tested is the arithmetic mean value of the elasticity moduli of three test pieces, accurate to 10 MPa. 6.3.5 Immersion peeling performance test
Carry out the test as specified in the immersion peeling test in GB/T 17657. The processing conditions of test pieces shall be as specified in the requirements for class I immersion peeling test.
6.3.6 Short-span shear force test
6.3.6.1 Principle
Determine the maximum load borne by test pieces over a specified span.
6.3.6.2 Apparatus
Including.
a) universal mechanical tester, accurate to 10 N; and
b) Vernier caliper, division value 0.02 mm.
6.3.6.3 Test method
6.3.6.3.1 Test pieces are stored at (20 ?? 2)??C and relative humidity (65 ?? 5)% to a constant mass.
NOTE It is deemed that the mass is constant when the difference in mass measured two times 24 h apart is less than 0.1% of the mass.
7.3.2 If the appearance quality, dimensions and mechanical performance of products are as specified, then the batch of products is determined to be accepted, or else, it is determined to be rejected.
8 Marking, Packaging, Transportation and Storage
8.1 Marking
8.1.1 Product marking
Products shall be marked at the proper positions with product name, manufacturer name, product standard number, manufacturing date and inspection mark and so on. 8.1.2 Packaging label
Packaging label shall be indicated with product name, manufacturer name, address, product standard number, manufacturing date, quantity and dampproof, sun protection mark and so on.
8.2 Packaging
Products shall be packaged in accordance with specifications, tree varieties and batch numbers when they are delivered. Package shall make sure that products are protected from bump, scratch and contamination. The requirements for packaging can also be as agreed by the supplier and the purchaser.
8.3 Transportation and storage
Products shall be piled in order during transportation and storage and protected from contamination, damp, rainwater and sun...

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