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LY/T 2222-2020: Bamboo veneer
Status: Valid LY/T 2222: Evolution and historical versions
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Bamboo veneer
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LY/T 2222-2020
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| LY/T 2222-2013 | English | 479 |
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PDF similar to LY/T 2222-2020
Basic data | Standard ID | LY/T 2222-2020 (LY/T2222-2020) | | Description (Translated English) | Bamboo veneer | | Sector / Industry | Forestry Industry Standard (Recommended) | | Classification of Chinese Standard | B70 | | Classification of International Standard | 79.020 | | Word Count Estimation | 11,110 | | Date of Issue | 2020-03-30 | | Date of Implementation | 2020-10-01 | | Older Standard (superseded by this standard) | LY/T 2222-2013 | | Regulation (derived from) | Announcement No. 6 of 2020 by the State Forestry and Grassland Bureau | | Issuing agency(ies) | State Forestry and Grassland Administration | LY/T 2222-2020: Bamboo veneer---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Bamboo veneer
ICS 79.020
B 70
People's Republic of China Forestry Industry Standard
LY
Replace LY/T 2222-2013, LY/T 2609-2016
Bamboo Veneer
2020-03-30 released
2020-10-01 Implementation
Issued by the State Forestry and Grassland Administration
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is an integrated revision of the two standards of LY/T 2222-2013 "Sliced Bamboo Veneer" and LY/T 2609-2016 "Rotary Cut Bamboo Veneer".
Compared with LY/T 2222-2013 and LY/T 2609-2016, this standard has the following main technical changes except for editorial changes.
Modified the scope (see Chapter 1, Chapter 1 of the LY/T 2222-2013 edition, Chapter 1 of the LY/T 2609-2016 edition);
Revised the normative reference documents (see Chapter 2, Chapter 2 of LY/T 2222-2013 edition, Chapter 2 of LY/T 2609-2016 edition);
Added terms and definitions (see 3.1, 3.4);
Modified terms and definitions (see 3.2, 3.3, 3.5~3.15, 3.1, 3.2, 3.7~3.15 of LY/T 2222-2013 edition, LY/T 2609-2016
Version 3.1, 3.4~3.7);
Deleted terms and definitions (3.3~3.6 of LY/T 2222-2013 edition, 3.2, 3.3, 3.8, 3.9 of LY/T 2609-2016 edition);
Modified the classification (see Chapter 4, Chapter 4 of LY/T 2222-2013 edition, Chapter 4 of LY/T 2609-2016 edition);
Modified specifications, dimensions and deviations (see Table 1, Table 1 of LY/T 2222-2013 edition, Table 1 of LY/T 2609-2016 edition);
Increase the diagonal difference (see Table 2);
Modified appearance quality (see Table 3, Table 2 of LY/T 2222-2013 edition, Table 2 of LY/T 2609-2016 edition);
Modified the moisture content (see 5.4.1, LY/T 2222-2013 version 5.3, LY/T 2609-2016 version 5.4.1);
Modified the formaldehyde emission (see 5.4.2, 5.4.2 of LY/T 2222-2013 edition);
Modified the measurement method of length, width and thickness (see 6.1.2, 6.1.3, 6.2.2, 6.2.1, 6.2.3 of LY/T 2222-2013 edition,
6.1 and 6.2 of LY/T 2609-2016 edition);
The measurement method of diagonal difference is added (see 6.1.4);
Modified sampling and test pieces (see Table 5, Table 4 of LY/T 2222-2013 edition);
Modified sampling plan and determination rules (see 7.2, LY/T 2222-2013 version 7.2, LY/T 2609-2016 version 7.2).
This standard was proposed and managed by the National Bamboo and Rattan Standardization Technical Committee (SAC/TC 263).
Drafting organizations of this standard. Nanjing Forestry University, Hangzhou Zhuangyi Furniture Co., Ltd., Zhejiang Jiuchuan Bamboo and Wood Co., Ltd., Fujian Dazhuang
Bamboo Industry Technology Co., Ltd., Dehua Rabbit Baby Decoration New Material Co., Ltd., Hangzhou Heen Bamboo Material Co., Ltd., Zhejiang Agriculture and Forestry University, Zhejiang
Provincial Academy of Forestry, Beijing Forestry University, Nanjing Wood-based Panel Testing Station of State Forestry Administration, Fujian Huayu Group Co., Ltd., Fujian Jinzhu
Bamboo Industry Co., Ltd., Zhejiang Shenghua Yunfeng New Materials Co., Ltd., Guizhou Xinjin Bamboo and Wood Products Co., Ltd., Ningbo Shilin Arts & Crafts Co., Ltd.
Company, Double Gun Technology Co., Ltd., Jiangshan Oupai Door Industry Co., Ltd., Hangzhou Senrui Bamboo and Wood Industry Co., Ltd., Zhejiang Baishanzu Industry and Trade
Co., Ltd., Jiangxi Oriental Famous Bamboo Industry Co., Ltd., Jiangxi Zhuangchi Household Technology Co., Ltd., Hangzhou Johnson Shengwei Decoration Materials Co., Ltd.,
Hangzhou Mingyi Craft Products Co., Ltd., Zhejiang Zhuangcheng Bamboo Industry Co., Ltd., Jiangxi Benbo Technology Development Co., Ltd., Fujian Juyi Bamboo and Wood Industry Co., Ltd.
Co., Ltd., Fujian Chiyu Decoration Materials Co., Ltd., Xiamen Weihaotai Technology Co., Ltd., Guangdong Haochenwang Technology Co., Ltd., Kaihua Zuxing
Tang Furniture Factory.
The main drafters of this standard. Li Yanjun, Liang Xingyu, Zhang Jian, Liu Hongzheng, Lou Zhichao, Wang Xinzhou, Chen Lican, Xu Bin, Zhan Xianxu,
Zhou Songzhen, Xia Li, Zhang Weigang, Guo Xuemai, Wang Jianqin, Yao Shehua, Lin Yong, Yao Lianshu, Gu Shuixiang, Li Xiaoxian, Xu Jiang, Wu Shuigen,
Lian Suxiang, Wang Gang, Wu Rong, Zhou Yifan, Xie Xuqin, Wu Youqing, Dai Yueping, Zhang Shuizhen, Zhang Zhihuan, Lin Hongsong, Chen Jinming, Chen Zuxing.
The previous versions of the standard replaced by this standard are as follows.
LY/T 2222-2013;
LY/T 2609-2016.
Bamboo Veneer
1 Scope
This standard specifies the terms and definitions, classification, requirements, inspection methods, inspection rules, marking, packaging, transportation and
Storage etc.
This standard applies to bamboo veneers made by peeling, slicing or sawing.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this
file. For undated references, the latest version (including all amendments) applies to this document.
GB/T 2828.1-2012 Sampling Inspection Procedures by Attributes Part 1.Batch-by-batch Inspection Sampling Retrieved by Acceptance Quality Limit (AQL)
GB/T 17657-2013 Test method for physical and chemical properties of wood-based panels and facing wood-based panels
GB/T 18259-2018 Artificial board and its surface decoration terms
GB 18580 The limit of formaldehyde emission in wood-based panels and products of interior decoration materials
GB/T 19367-2009 Determination of the size of wood-based panels
GB/T 36394-2018 Bamboo Product Terminology
LY/T 1660 Terminology for bamboo wood-based panels
3 Terms and definitions
The following terms and definitions defined in GB/T 18259-2018, GB/T 36394-2018 and LY/T 1660 apply to this document.
3.1
Bamboo veneer
A sheet-like material with a certain width, which is made of bamboo tube peeling, bamboo glulam slicing or sawing.
Note. Rewrite GB/T 36394-2018, definition 2.1.11.
3.2
Sliced bamboo veneer
A bamboo veneer made of bamboo laminated lumber through slicing.
3.3
Rotary-cut bamboo veneer
A bamboo veneer made of bamboo tube by peeling.
3.4
Sawed bamboo veneer
The bamboo veneer is sawn and cut from the laminated bamboo, usually the thickness does not exceed 3 mm.
3.5
Natural bamboo veneer
Untreated bamboo veneer with natural bamboo color.
3.6
Bleached bamboo veneer
Bamboo veneer made by bleaching processing.
3.7
Color darkening bamboo veneer
Bamboo veneer made by carbonization processing.
3.8
Colored bamboo veneer
Colored bamboo veneer.
3.9
Matched bamboo veneer
The natural color, bleached, carbonized or dyed bamboo strips are combined and glued into bamboo boards or bamboo squares to make bamboo veneers.
3.10
Strengthened bamboo veneer
Reinforced bamboo veneer made by bonding bamboo veneer with backing materials such as paper and non-woven fabric.
3.11
Glue penetration
The phenomenon in which the adhesive penetrates the surface of the veneer and causes the surface of the board to be contaminated.
Note. Rewrite GB/T 18259-2018, terms and definitions 3.1.126.
3.12
Glue marks
Glue marks between adjacent bamboo pieces.
3.13
Local lack of lining
The backing material of the bamboo veneer is partially defective.
3.14
Back lining blister and cockle
The backing material of the bamboo veneer is locally raised or shrunk.
3.15
Back lining separation
The bamboo veneer is separated from the backing material.
4 categories
4.1 According to the surface color.
Natural bamboo veneer;
Bleached bamboo veneer;
Carbonized bamboo veneer;
Toning bamboo veneer;
Mosaic bamboo veneer.
4.2 Divided by processing method.
Rotary cut bamboo veneer;
Sliced bamboo veneer;
Sawing bamboo veneer.
5 requirements
5.1 Classification
When finished bamboo veneer products meet the requirements of this standard in terms of specifications, dimensions, deviations and other physical and chemical properties, they are classified as excellent according to their appearance and quality.
Equal and qualified products.
5.2 Specifications and deviations
5.2.1 Thickness, width and length specifications and deviations
Should meet the requirements of Table 1.
5.2.2 Diagonal size and deviation
Should meet the requirements of Table 2.
5.4.2 Formaldehyde release
Should meet the requirements of GB 18580.Uncoated peeling bamboo veneer Except for.
6 Inspection method
6.1 Specifications and deviations
6.1.1 Measuring tools.
Micrometer, the graduation value is 0.01 mm;
Steel tape with a graduation of 1.0 mm.
6.1.2 Length and width
According to the provisions of GB/T 19367-2009 in 8.2.
6.1.3 Thickness
According to the provisions of GB/T 19367-2009 in 8.1, the bamboo joints should be avoided.
6.1.4 Diagonal difference
Measure the diagonal length of the veneer with a steel tape, and calculate the absolute value of the difference between the two diagonals to the nearest 1 mm.
6.2 Appearance quality
6.2.1 Through visual inspection or measuring tool inspection one by one, determine its grade according to the provisions of Table 3.
6.2.2 Defect measurement. measure the number of defects on the surface of the bamboo veneer with meters as the unit of measurement, and use the measured number of defects as the length and surface of the board
The number of defects.
6.3 Physical and chemical properties
6.3.1 Sampling and test pieces
The distribution of the sample in the sample and the configuration of the test piece are shown in Figure 1 and Figure 2.The sample is distributed according to Figure 1 to prepare 3 samples, and then according to the figure
2 shows the test pieces with moisture content on each sample. If the sample width is not enough, samples can be prepared separately from several samples in the same batch.
Several samples of the same batch can also be spliced together in the same direction. When intercepting samples and test pieces, avoid material defects that affect the accuracy of the test.
Sinks and processing defects, and keep the surface of the test piece clean. When there is a defect in the specified place for taking the test piece, the preparation position of the test piece can be moved appropriately.
Unit is mm
6.3.2 Water content
According to the provisions of 4.3 in GB/T 17657-2013.
6.3.3 Formaldehyde emission
According to the provisions of GB/T 18580.
7 Inspection rules
7.1 Inspection classification
Product inspection is divided into factory inspection and type inspection.
7.2 Factory inspection
The factory inspection includes the following items.
Standard sizes;
Appearance Quality;
Water content in physical and chemical properties.
7.3 Type inspection
Type inspection includes all inspection items specified in this standard. During normal production, the type inspection shall not be less than once every six months.
In one case, type inspection should be carried out.
When the raw and auxiliary materials and production process undergo major changes;
When production resumes after a long-term shutdown;
When the market supervision agency requests for type inspection.
7.2 Sampling plan and determination rules
7.2.1 Specification and size inspection
7.2.1.1 Sampling plan
The inspection of thickness, width, length and diagonal difference adopts the general inspection level I and acceptance quality limit (AQL) in GB/T 2828.1-2012
It is the secondary sampling of 6.5 normal inspection, and the sampling plan is shown in Table 5.
7.2.1.2 Judgment rules
For thickness, width, length, and diagonal difference, the number of samples for the first inspection should be equal to the number of samples given in the plan. According to Table 1,
Table 2 requires judgment. If the number of unqualified products found in the first sample is less than or equal to the first acceptance number, the batch of products should be considered acceptable.
To receive. If the number of nonconforming products found in the first sample is greater than or equal to the first rejected number, the batch of products should be considered unacceptable.
If the number of nonconforming products found in the first sample is between the first acceptance number and the first rejection number, a second sample should be taken. If tired
If the number of unqualified products found in the first and second samples is less than or equal to the second acceptance number, it is determined that the batch of products is acceptable. in case
If the cumulative number of unqualified products is greater than or equal to the second rejected number, the batch of products is determined to be unacceptable.
7.2.2 Appearance quality inspection
7.2.2.1 Sampling plan
Appearance quality inspection adopts the general inspection level II in GB/T 2828.1-2012 and the normal inspection II with an acceptance quality limit (AQL) of 4.0
Sub-sampling, the sampling plan is shown in Table 6.When multiple defects exist on a board at the same time, the defect that affects the product level is judged.
7.2.2.2 Judgment rules
The sample size for the first inspection should be equal to the first sample size given in the plan. If the number of nonconforming products found in the first sample is less than
Or equal to the first acceptance number, the batch of products should be considered acceptable. If the number of nonconforming products found in the first sample is greater than or equal to the first
For a rejected number, the batch of products shall be considered unacceptable.
If the number of nonconforming products found in the first sample is between the first acceptance number and the first rejection number, a second sample should be taken. If tired
If the number of unqualified products found in the first and second samples is less than or equal to the second acceptance number, it is determined that the batch of products is acceptable. in case
If the cumulative number of unqualified products is greater than or equal to the second rejected number, the batch of products is determined to be unacceptable.
7.2.3 Physical and chemical performance inspection
7.2.3.1 Sampling plan
Samples are randomly selected from the batch submitted for inspection. The sampling plan is shown in Table 7.Items that fail the first sampling inspection are allowed to be in the same batch.
Double the sampling re-inspection of the secondary products, and the re-inspection is divided into two groups.
7.2.3.2 Judgment rules
When the moisture content and formaldehyde emission meet the requirements, it is qualified; otherwise, the unqualified items should be doubled for sampling and re-inspection. When the re-inspection is qualified,
The physical and chemical properties of this batch of products are judged as qualified, otherwise it is judged as unqualified.
7.3 Comprehensive judgment
The three inspection results of product specifications and dimensions, appearance quality, and physical and chemical properties meet the technical requirements of the corresponding level, and the batch of products is determined to be
Qualified products, otherwise judged as unqualified products.
8 Packaging, marking, transportation and storage
8.1 Packaging
8.1.1 The bamboo veneers are packaged in bundles according to grade, specification and quantity. After the plastic film is sealed, it is put into a cardboard box.
It is firm and level to avoid damage to the bamboo veneer.
8.1.2 Bundles of bamboo veneers are packaged into large packages according to different grades, thicknesses and specifications. The packaging should be based on storage and transportation needs and the moisture content of bamboo veneers
Take corresponding measures to prevent moisture, mildew and corrosion. The upper and lower parts of the bale are made of corrugated plywood (sawn timber or artificial board and other hard
Packing materials) clamped, and then packed with steel or plastic belts, etc. The packaging should be firm to avoid damage. After packing, it should be stacked 10 cm above the ground
Store indoors above the wooden frame foundation. The storage place should be ventilated and dry. Packaging requirements can also be negotiated between the supplier and the buyer.
8.2 Sign
8.2.1 The surface of each bundle of bamboo veneers shall have the number, specification, type, grade, quantity and other signs of the bamboo veneer, and the signs must be clear.
8.2.2 There should be a sign on each large package, indicating the product name, standard number, category, thickness, grade, trademark, name of the manufacturer, and location.
Address and other content.
8.2.3 There should be transportation and moisture-proof marks on the big bag.
8.3 Transportation and storage
The product should be protected from rain, moisture, sun and deformation during transportation and storage.
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