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GB 23441-2009 English PDF

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GB 23441-2009: Self-adhering polymer modified bituminous waterproof sheet
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GB 23441-2009English279 Add to Cart 3 days [Need to translate] Self-adhering polymer modified bituminous waterproof sheet Valid GB 23441-2009

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Basic data

Standard ID GB 23441-2009 (GB23441-2009)
Description (Translated English) Self-adhering polymer modified bituminous waterproof sheet
Sector / Industry National Standard
Classification of Chinese Standard Q17
Classification of International Standard 91.120.30
Word Count Estimation 12,176
Date of Issue 2009-03-28
Date of Implementation 2010-03-01
Older Standard (superseded by this standard) JC 840-1999; JC 898-2002
Quoted Standard GB/T 328.2-2007; GB/T 328.8-2007; GB/T 328.9-2007; GB/T 328.10-2007; GB/T 328.11-2007; GB/T 328.14-2007; GB/T 328.18-2007; GB/T 328.20-2007; GB/T 328.26-2007
Adopted Standard ASTM D1970-2001, NEQ
Regulation (derived from) Announcement of Newly Approved National Standards No. 4, 2009 (No. 144 overall)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This Chinese standard specifies the self-adhesive polymer modified bitumen membrane (abbreviated self-adhesive membrane) classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage. This standard applies to the self-adhesive polymer modified asphalt -based material, non-exposed group, or use a polyester tire tread base enhanced body self-adhesive waterproofing membrane. This standard does not apply to only the surface of the adhesive layer is covered with a polymer modified bitumen membrane.

GB 23441-2009: Self-adhering polymer modified bituminous waterproof sheet

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Self-adhering ploymer modified bituminous waterproof sheet ICS 91.120.30 Q17 National Standards of People's Republic of China Self-adhesive polymer modified bitumen membrane Published 2009-03-28 2010-03-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China issued

Foreword

This standard of 4.3 is mandatory, the rest are recommended. This corresponds to a standard ASTMD1970-2001 "Cushion for sloping roof ice dam preventing self-adhesive polymer modified bitumen membrane", this ASTMD1970-2001 degree of consistency with standard non-equivalent. The standard proposed by China Building Materials Federation. This standard by the National Building Materials and Decoration Standardization Technical Committee of Light (SAC/TC195) centralized. This standard is drafted. building materials industry and technical supervision research center, Chinese chemical building materials company in Suzhou waterproof materials research Design, China Waterproof Building Materials Industry Association. Participated in the drafting of this standard. Shanghai wet Parkway Waterproof Building Materials Co., Ltd., Shanghai North Cai waterproof materials Co., Ltd., Wuhan Murray Shin New Building Material Co., Ltd., Grace China Ltd., Panjin Yuwang Waterproof Building Materials Group Co., Ltd., Beijing Oriental Yuhong Waterproof Technology Co., Ltd., Guangdong Branch Shun Chemical Industry Co., Ltd., Shenzhen Zhuo Symbol Technologies Inc., Japan Tajima green Fu Co., Su Suzhou City, New Building Materials Co., Soprema (Shanghai) Building Materials Trade Co., Ltd., Shandong Huiyuan Building Materials Group Co., Ltd., Beijing Jianguo Albert Waterproof Materials Co., Ltd, Wenzhou City, the Great Wall Waterproof Material Factory, Xuzhou Woniushan new waterproof materials Co., Ltd., Panjin City Dayu Waterproof Building Materials Co., Ltd., Beijing built the Friends of building materials Co., Ltd., Beijing Century Hong waterproof rain Technology Co., Ltd., Panjin Liuhe prevention Water Materials Co., Ltd., Shanghai Industrial Co., Ltd. Taian Engineering, Weifang Hongyuan Waterproof Materials Co., Ltd., Weifang City Yu Hong waterproof material (set Group) Co., Ltd., Chengdu, Dorset waterproof material limited liability company, Jie Siman (Shanghai) Co., Ltd. Non-woven, waterproof umbrella decorated with gold Guangxi Limited, Shandong Xin Xin Daru waterproof materials Co., Ltd. Shandong Kim Yu Wang waterproof material, waterproof material Ltd. Tangshan De Health, Ze source of Weifang City waterproof material Co., Ltd., Weifang waterproof material Chia Tai Co., Ltd. Weifang City Chint waterproof materials, Shouguang City Hing Teng Waterproof Materials Co., Ltd., Shenyang Star Chemical Co., Ltd., Lanxi City days Shin New Building Material Co., Ltd., Ningbo to Long decorative waterproof material Material Limited. The main drafters. Yang Bin, Zhu Zhiyuan, Zhu Dongqing, Zou Xianhua, Chen Weizhong, Li Xin-wide, full-Kun, Zhan Fumin, Ding Hongmei, In Xu, Duan Feng, Chen Bin, Zheng Jiayu, Xuqiu Sheng. This standard is the first release. The date of implementation of this standard, JC840-1999 "self-adhesive rubber asphalt waterproofing membrane", JC898-2002 "self-adhesive polymer modified asphalt Green polyester tire waterproofing membrane "abolished. Self-adhesive polymer modified bitumen membrane Range 1 This standard specifies the classification of the self-adhesive polymer modified bitumen membrane (referred to as self-adhesive membrane), requirements, test methods, inspection rules, standard Chi, packaging, transportation and storage. This standard applies to the self-adhesive polymer modified asphalt binder, the non-exposed group used without fetal or a polyester-based reinforced tire body from Stick waterproofing membrane. This standard is not only the surface covered with self-adhesive layer of a polymer modified bituminous waterproofing membrane.

2 Normative references

Terms of the following documents become provisions of this standard by reference in this standard. For dated reference documents, all later Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to agreements based on this standard Whether the latest versions of these documents. For undated references, the latest version applies to this standard. GB/T 328.2-2007 building waterproofing Test Method Part 2. Asphalt waterproofing Appearance GB/T 328.8-2007 Test methods for building sheets for waterproofing - Part 8. Bitumen waterproofing - tensile properties GB/T 328.9-2007 building waterproofing Test Method Part 9. waterproofing tensile properties GB/T 328.10-2007 Test methods for building sheets for waterproofing Part 10. Bitumen waterproofing impermeability GB/T 328.11-2007 Test methods for building sheets for waterproofing Part 11. Bitumen sheets for waterproofing heat resistance GB/T 328.14-2007 Test methods for building sheets for waterproofing Part 14. Bitumen waterproofing membrane low temperature flexibility GB/T 328.18-2007 building waterproofing Test Method Part 18. asphalt waterproofing membrane tearing (nail shank) GB/T 328.20-2007 building waterproofing Test Method Part 20. Asphalt waterproofing the seam peel strength GB/T 328.26-2007 building waterproofing Test Method Part 26. Asphalt waterproofing soluble content (dip sheet Material content) Category 3 3.1 Types Product according to whether the reinforcement is divided into a tread base without fetal yl (N type), polyester tire base (PY class). N type material is divided by the upper surface of a polyethylene film (PE), polyester film (PET), double-sided adhesive-free film (D). PY-based material is divided by the upper surface of a polyethylene film (PE), fine sand (S), no double-sided self-adhesive film (D). Product according to performance into Ⅰ and Ⅱ type, web thickness of only 2.0mm Ⅰ PY class type. 3.2 Specifications 3.2.1 nominal web width is 1000mm, 2000mm. 3.2.2 Coil nominal area of 10m2,15m2,20m2,30m2. 3.2.3 web thickness is. --- N categories. 1.2mm, 1.5mm, 2.0mm; --- PY class. 2.0mm, 3.0mm, 4.0mm. 3.2.4 Other specifications agreed upon by both supply and demand. 3.3 mark By product name, category, type, on the surface of the material, thickness, area, standard number order flag. Example. 20m2,2.0mm polyethylene film surface Ⅰ N-type adhesive polymer modified asphalt-based waterproofing marked. Self-adhesive membrane NⅠPE2.020GB 23441-2009.

4 Requirements

4.1 area, mass per unit area, thickness 4.1.1 area of not less than 99% of the area of tag values. 4.1.2 N type mass per unit area, should be consistent with the thickness specified in Table 1. 4.1.3 PY-based mass per unit area, thickness shall be as specified in Table 2. 4.1.4 with the seller agreed specifications, the thickness of the N type not less than 1.2mm, PY class not less than 2.0mm. Table 1 N-based mass per unit area, thickness Specifications thickness/mm 1.2 1.5 2.0 Surface of the material PE, PET, D PE, PET, D PE, PET, D Mass per unit area/(kg/m2) ≥ 1.2 1.5 2.0 Thickness/mm The average value of ≥ 1.2 1.5 2.0 The minimum singular value 1.0 1.3 1.7 Table 2 PY-based mass per unit area, thickness Specifications thickness/mm 2.0 3.0 4.0 Surface of the material PE, D S PE, D S PE, D S Mass per unit area/(kg/m2) ≥ 2.1 2.2 3.1 3.2 4.1 4.2 Thickness/mm Average value ≥ 2.0 3.0 4.0 The smallest single value 1.8 2.7 3.7 4.2 Appearance 4.2.1 rolls web roll should be wound up together, in-out in the end face must not exceed 20mm. 4.2.2 into a roll at a roll product according to any expand at a temperature of 4 ℃ ~ 45 ℃, 1000mm in length from the outside of the core should be crack length or 10mm or more bonding. 4.2.3 PY products, which should be saturated tread base, there should be no light streaks are not impregnated. 4.2.4 web surface shall be smooth with holes, agglomeration, bubbles, and the lack of edge cracks, the upper surface of the sand, fine sand should be uniform and Closely adhered to the surface of the web. 4.2.5 Each sheet roll joints should not exceed one short a length not less than 1000mm, the joint should be cut neatly, and add 150mm long. 4.3 Physical and mechanical properties 4.3.1 N web-based physical and mechanical properties to be shown in Table 3. 4.3.2 PY web-based physical and mechanical properties should meet the requirements in Table 4. Table 3 N web-based physical and mechanical properties project index PE PET Ⅰ Ⅱ Ⅰ Ⅱ Tensile/(N/50mm) ≥ 150 200 150 200 - When the maximum tensile force elongation /% ≥ 200 30 - Asphalt elongation /% ≥ 250 150 450 When stretching phenomenon during stretching, no film breakage prior to capping with coating bituminous membrane separation - Table 3 (Continued) project index PE PET Ⅰ Ⅱ Ⅰ Ⅱ Tear strength of the shank 2/N ≥ 60 110 30 40 - 3 the heat resistance is not more than 2mm slide 70 ℃ 4 Low temperature flexibility/℃ -20 -30-20-30-20 No cracks 5 impermeability 0.2MPa, 120min impervious - Peel strength / (N/mm) ≥ 1.0 membrane and membrane 1.5 aluminum plate web

7 shank watertight by

Permeability of 8/the number of ≤ 2 9 holding adhesive/min ≥ 20 10 thermal aging Tensile retention /% ≥ 80 Elongation at maximum tensile force /% 400 (asphalt layer Elongation at break) Low temperature flexibility/℃ -18 -28-18-28-18 No cracks Peel strength of the web and the aluminum / (N/mm) ≥ 1.5 11 Thermal Stability Appearance free from the drum, wrinkles, sliding, flowing Dimensional change /% ≤ 2 Table 4 PY web-based physical and mechanical properties No. Item index Ⅰ Ⅱ 1 soluble content/(g/m2) ≥ 2.0mm 1300 - 3.0mm 2100 4.0mm 2900 Tensile/(N/50mm) ≥ 2.0mm 350 - 3.0mm 450 600 4.0mm 450 800 Elongation at maximum tensile force /% ≥ 30 40 70 3 deg.] C heat resistance without sliding, flowing, dropping 4 Low temperature flexibility/℃ -20-30 No cracks 5 impermeability 0.3MPa, 120min impermeable Table 4 (Continued) No. Item index Ⅰ Ⅱ Peel strength / (N/mm) ≥ 1.0 membrane and membrane 1.5 aluminum plate web

7 shank watertight by

Permeability of 8/the number of ≤ 2 9 holding adhesive/min ≥ 15 10 thermal aging Elongation at maximum tensile force /% ≥ 30 40 Low temperature flexibility/℃ -18-28 No cracks Peel strength of the web and the aluminum plate/(N/mm) ≥ 1.5 Dimensional stability /% ≤ 1.5 1.0 11 and then the peel strength adhesive bitumen/(N/mm) ≥ 1.5

5 Test methods

5.1 Preparation of test piece After clipping in samples (23 ± 2) ℃ placed 24h, each web specimen in the width direction of the cut sample evenly distributed, avoiding the edges of the web More than 100mm. Category N membrane specimen size and quantity shown in Table 5, PY-based membrane specimen size and quantity shown in Table 6. Table 5 N-based web specimen size and quantity No. Item Size (longitudinal × lateral)/Number of mm/a 1 Tensile properties 100 × 25 5 each aspect 2 the shank transverse tear strength of 100 × 200 5 3 the heat resistance of 100 × 50 3 4 150 × 25 10 Low temperature flexibility 5 impermeable 150 × 150 3

6 peel strength

Coil and the coil 50 × 150 10 (5 specimens) Roll aluminum plate 250 × 50 5 7 watertight shank 300 × 300 2 8 permeability of 50 × 50 3 9 holding adhesive 150 × 50 5 10 thermal aging 250 × 250 3 11 Thermal Stability of 300 × 300 1 Table 6 PY-based web specimen size and quantity No. Item Size (longitudinal × lateral)/Number of mm/a 1 solubles content 100 × 100 3 2 Tensile Properties (250 ~ 300) × 50 5 each aspect 3 the heat resistance of 125 × 100 3 4 150 × 25 10 Low temperature flexibility 5 impermeable 150 × 150 3

6 peel strength

Coil and the coil 50 × 150 10 (5 specimens) Roll aluminum plate 250 × 50 5 7 watertight shank 300 × 300 2 8 permeability of 50 × 50 3 9 holding adhesive 150 × 50 5 10 thermal aging Elongation (250 ~ 300) × 50 5 each aspect 150 × 25 10 Low temperature flexibility Peel strength of the web and the aluminum plate 250 × 50 5 Dimensional stability (250 ~ 300) × 50 5 longitudinal Self-adhesive bitumen 11 and then a peel strength 250 × 50 5 5.2 area 1mm with a minimum value of three measuring tape indexing at about 100mm in width and length and the central web end edges, a wide area Obtained by multiplying the mean of the average length. If the joint to measure out the two lengths of 150mm minus the sum calculation. 5.3 area per unit mass With a minimum value of the indexing scale weighing 0.2kg mass per volume of the web, and weighing not include release of the core material. According to obtained 5.2 The area, mass per unit area is calculated. Thickness 5.4 The indexing thickness is 0.01mm, a pressure of (20 ± 5) kPa, a contact surface having a diameter of 10mm thickness was measured, and immediately dropped gently Reading, should be measured to ensure the smooth web. The web in the width direction of a clipping 30mm wide, 100mm in from the edge of the web ends An outer, inwardly in the direction of the uniform web width measuring five o'clock to five o'clock in the average thickness of the web, net thickness of the release material. Class S In addition to the web should be measured after brushing the sand surface. 5.5 Appearance According to GB/T 328.2-2007 be visually observed. 5.6 solubles Proceed as GB/T 328.26-2007. 5.7 Tensile properties 5.7.1 N-based web Extending when tested in accordance GB/T A method of 328.9-2007, distance between chucks 50mm, the maximum recorded force (N) and maximum tensile rate. Elongation at break of the specimen asphalt bitumen layer appears holes, tear elongation at break (%), observed and recorded film breakage during stretching Asphalt coating before the presence or absence of the cap layer and membrane separation. Take the average of five test pieces, the tension unit is N/50mm. 5.7.2 PY class web According to GB/T 328.8-2007 tested. 5.8 shank tear strength According to GB/T 328.18-2007 tested. 5.9 heat resistance 5.9.1 N-based web Heat resistance test piece stuck to the surface of a clean smooth plywood (plywood), with a mass of 2kg, the width (50 ~ 60) mm repeatedly pressing roller Rolling three times, and marked along the lower end of the web on plywood, the longitudinal direction of the specimen is suspended vertically in an oven (70 ± 2) ℃ in 2h, taking out fine Measuring the distance of not less than 0.5mm in the measurement specimen decline. Plywood should not be reused. 5.9.2 PY class web Carried out as in GB/T 328.11-2007 A method, test temperature (70 ± 2) ℃. 5.10 Low temperature flexibility According to GB/T 328.14-2007 tested. N products bending axis having a diameter of 20mm; PY products having a thickness of 2.0mm, Bending axis diameter of 30mm 3.0mm; diameter curved shaft having a thickness of 4.0mm product was 50mm. 10 in longitudinal specimens, five Surface, respectively the lower surface of the test specimen on five specimens. Five test pieces on each side of at least four specimen surface by visual inspection for a crack-free, two upper and lower It is considered to meet the surface by low temperature flexibility requirements. 5.11 impermeability Tested according to GB/T 328.10-2007 in Method B. Category N membrane with cross slotted plate, perforated plate Seven-PY-based, test time To 2h, peeling off the release material covers the filter paper to prevent sticking. 5.12 peel strength 5.12.1 membrane and membrane At (23 ± 2) ℃ conditions, according to GB/T 328.20-2007 tested. The table surface and the other member of the test specimen under a The adhesive surface, the adhesive surface is 50mm × 75mm, the mass of 2kg, three times the width of the pressing roller repeatedly rolling (50 ~ 60) mm, and is placed after bonding 24h. Maximum force calculated by the arithmetic mean peel strength in N/mm, taking the results of five test pieces as the test result. Fine sand surface at the left side of the web of the test sample. After the double-sided self-adhesive membrane to the N type, one surface of polyester reinforcing film, it was tested. 5.12.2 aluminum plate web At (23 ± 2) ℃ conditions, reference to GB/T 328.20 The web specimen was adhered to a smooth aluminum surface with a solvent cleaning, an adhesive surface is 50mm × 75mm, the mass of 2kg, the width (50 ~ 60) mm platen roller is repeatedly rolled three times after the adhesive is placed 24h. Aluminum end clip The clamp is bent to the same side of the web sandwiched between the other 180 ° test jig. With the maximum force calculated peel strength in N/mm, to take five The arithmetic mean of the results of a test piece as the test result. Double-sided self-adhesive products were tested on both sides. After the double-sided self-adhesive membrane to the N type, one surface of polyester reinforcing film, it was tested. 5.13 shank watertightness 5.13.1 Preparation of test piece At (23 ± 2) ℃ conditions, the test piece is removed release material, the web on the web of light plywood of the same size (five plywood), with Quality 2kg, the width (50 ~ 60) mm platen roller is repeatedly rolled three times, making the adhesive and plywood. Plywood should not be reused. Two pieces of wood as plywood support decentralized, so that the nails into. The length (30 ± 4) mm, the diameter (3.5 ~ 4) mm plating wingless Zinc unthreaded staple, driven into the surface of the web from the plywood, two nails driven into a position near the center distance between the test piece, the nail (25 ~ 50) mm, the nails driven into the nut flush with the surface of the web, and then tapping the back of a nail from the nail head is raised, so that the nut roll table 6mm from the surface. Total two specimens prepared. 5.13.2 Test Procedure A diameter on the (150 ~ 250) mm, height not less than 150mm of tube centered on the horizontal surface of the specimen sheet, then Sealant along the outer ring seal on the web, placed after 2h, in a circle along the edge of the seal, and then curing 24h at room temperature. Put it in a tube with no cover and diameter similar to the drying vessel, then add distilled water to the top of the pipe, the water level is (130 ± 3) mm, and then move it (4 ± 2) in a refrigerator ℃ placed 3d. 5.13.3 Evaluation of results Remove the specimen, observed within the container below the bottom of the plywood and the nail tip has a water mark. Discard the water and drying tube, peel off the roll Timber, roll back of observed water mark. Two specimens were not observed traces of water that test passed, report no seepage. Permeability of 5.14 The lower surface of the release material is removed for testing specimens were placed on 5-speed qualitative filter paper layer is greater than the diameter of the test piece, a filter paper underlay Glazed, the specimen weight above 1kg pressure, and the specimen placed in the heat resistance has been adjusted to a predetermined temperature in an oven, horizontally 5h ± 15min, removed at (23 ± 2) ℃ placed 1h, checks the number of sheets permeability. Where there are signs of contamination of filter paper are counted as leaking, oozing with three specimens in the maximum number of sheets as a result. 5.15 holding power 1 --- stainless steel plate; 2 --- specimen; 3 --- weight. Figure 1 holding power At (23 ± 2) ℃ conditions, the test piece stick to the two mirror surfaces have a clean smooth stainless steel plate with a solvent to clean, stainless steel upper plate Bonded area (50 × 50) mm on a steel plate, allowed to touch the specimen paste parts hands and other objects, then the mass of 2kg, width (50 ~ 60) mm platen roller rolling three times repeatedly. At (23 ± 2) ℃, the adhesive test piece after placing good 24h, suspended vertically in the direction shown in FIG. 1, the lower plate of the lower hanging weight 1kg (Mass includes a lower plate), a recording start time, recording the test piece is completely peeled off from the plate the required time in min. Take five specimen test results average of. If more than 60min No peeling, is recorded as greater than 60min. For an N-type double-sided self-adhesive membrane, one surface of a polyester film using the polyester tire group or enhancement test. Double-sided self-adhesive products, respectively, on both sides experimenting. 5.16 Thermal Aging 5.16.1 N type web The test piece placed horizontally (70 ± 2) ℃ oven 7d ± 2h, taken at (23 ± 2) ℃ 24h clipping specimen is placed. Tensile properties measured according to 5.7.1, according to equation (1) is calculated retention force. Rt = (T1/T) × 100 (1) Where. After sample processing RT --- tensile retention,%; T --- the average tension prior to sample processing, in units of Newton per 50 mm (N/50mm); After sample processing Tl --- average tension in Newtons per 50 mm (N/50mm). 5.10 as determined by low temperature flexibility. Peel strength of the web and the aluminum plate was measured by 5.12.2. 5.16.2 PY class web The test piece placed horizontally (70 ± 2) ℃ oven 7d ± 2h, taken at (23 ± 2) ℃ placed 24h. Tensile properties measured according to 5.7.2. 5.10 as determined by low temperature flexibility. Peel strength of the web and the aluminum plate was measured by 5.12.2. Amount of dimensional stability of size before and after heating the specimen, the dimensional stability is calculated according to equation (2). Xue D = L2/L1-1 Xue × 100 (2) Where. D --- After specimen processing size change rate,%; Before Ll --- specimen processing length in millimeters (mm); After processing the L2 --- specimen length in millimeters (mm). Taking the arithmetic mean of five test results of the test pieces. 5.17 Thermal Stability Removing the release material the lower surface of the test piece, the test piece stuck to the plywood some slightly larger size, the mass of 2kg, the width (50 ~ 60) mm Repeatedly pressing roller rolling three times, to measure the vertical and horizontal dimensions in the middle of both ends of the test piece and the test piece 30 degree angle with the horizontal into (70 ± 2) ℃ oven and removed after 24h, to observe and record the presence or absence of the specimen flow, mask slide intermediate dark phenomenon, excluding the edge warp. Measurement The amount of the specimen longitudinal, transverse dimension, longitudinal and transverse dimensions are calculated rate of change. 5.18 peelable adhesive strength asphalt Take a self-adhesive waterproofing membrane with a hot spatula blade coil coating under the cap layer, placed in a crucible, the crucible to ensure that the pitch of about 100g, The crucible is placed on a hotplate heated to melt the pitch, a temperature of about 180 ℃, then poured onto release paper asphalt screed, a thickness of approximately 1.5mm, Li That reinforced polyester film or polyester tire group. Preparation of total five test pieces, the adhesive can be used to prevent the specimen silicone paper isolation. After 4h placed in ℃ (23 ± 2), peel strength test according to 5.12.2.

6 Inspection Rules

6.1 Inspection Classification By inspection type into the factory inspection and type test. 6.1.1 factory inspection Factory inspection items comprising. a mass per unit area, thickness, size, appearance, tensile strength, elongation at maximum tensile force, elongation at break bitumen (N type), shank tear strength (N type), low temperature flexibility, heat resistance, and the aluminum plate web peel strength, holding adhesive, self-adhesive bitumen and then peel strength (PY class). 6.1.2 Type inspection Type inspection items include all items in Chapter 4 requirements. Type tested under the following conditions. a) production of new products or appraisement time; b) Normal production, once a year; c) raw materials, technology and other large changes that may affect product quality time; D) When the factory test results and the last type test results are quite different; e) Product discontinued six months or more when to resume production. 6.2 Batch With the same type, the same size as the number of 10000m2, 10000m2 also insufficient as a group. 6.3 Sampling Randomly selected from each batch for five volumes in area, thickness, appearance, quality inspection unit area. After passing the inspection, randomly selected from a sample of at least 1.5m2 of a take physical mechanical properties testing. 6.4 determine the rules 6.4.1 area, mass per unit area, thickness, appearance When area, mass per unit area, thickness, appearance, are in line with the provisions of 4.1, 4.2, sentenced area, mass per unit area, thickness, appearance of compliance. If one has a non-compliant, allowing the batch of products in five volumes w...

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