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GB 18242-2008: Styrene butadiene styrene (SBS) modified bituminous sheet materials
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Styrene butadiene styrene (SBS) modified bituminous sheet materials
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GB 18242-2008
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PDF similar to GB 18242-2008
Basic data | Standard ID | GB 18242-2008 (GB18242-2008) | | Description (Translated English) | Styrene butadiene styrene (SBS) modified bituminous sheet materials | | Sector / Industry | National Standard | | Classification of Chinese Standard | Q17 | | Classification of International Standard | 91.120.30 | | Word Count Estimation | 12,110 | | Date of Issue | 2008-09-18 | | Date of Implementation | 2009-09-01 | | Older Standard (superseded by this standard) | GB 18242-2000 | | Quoted Standard | GB/T 328.2; GB/T 328.4; GB/T 328.6; GB/T 328.8; GB/T 328.10-2007; GB/T 328.11-2007; GB/T 328.14; GB/T 328.17-2007; GB/T 328.18; GB/T 328.20; GB/T 328.26; GB/T 18244; GB/T 18840; JC/T 905 | | Adopted Standard | EN 13707-2004, NEQ | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 16 of 2008 (No. 129 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 elastomer modified bitumen membrane (referred SBS waterproofing membrane) of classification and labeling, raw materials, requirements, test methods, inspection rules, marking, packaging, storage and transportation. This standard applies to polyester felt, glass fiber mat, glass fiber reinforced polyester felt for the child group, styrene butadiene styrene (SBS) thermoplastic elastomers for asphalt modifier, both sides covered with isolation waterproofing membrane made ??of a material. | GB 18242-2008: Styrene butadiene styrene (SBS) modified bituminous sheet materials---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.
Styrene butadiene styrene (SBS) modified bituminous sheet materials
ICS 91.120.30
Q17
National Standards of People's Republic of China
Replacing GB 18242-2000
Elastomer modified bitumen membrane
Posted 2008-09-18
2009-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
5.3,8.1 this standard are mandatory, the rest are recommended.
This standard and EN13707-2004 "--- flexible waterproofing membrane roofing with bitumen membrane reinforced --- Definition and Requirements" consistency
Not equivalent.
This standard replaces GB 18242-2000 "elastomer modified bitumen membrane."
This standard compared with GB 18242-2000, the main changes are as follows.
--- Child-added in the glass fiber reinforced polyester felt (2000 Version 3.1.1; 3.1.1 edition);
--- Inclusion of a 5mm thickness of the product, remove the 2mm thickness product (2000 Version 3.2.2; edition 3.2);
--- Modification of the product usage tips (2000 Version 3.4; 3.4 edition);
--- Mass per unit area volume instead of weight (2000 version 4.1, this version 4.1);
--- Additional raw material requirements (Chapter 4 of this edition);
--- Material properties increases the second peak tensile, elongation, increase the quality of the second peak after flooding, heat aging, the permeability of the seam peel strength,
Nail shank tear strength, adhesion of mineral aggregates, asphalt membrane under the surface coating thickness (Table 3 of the 2000 edition, this version of Table 2);
--- Adjust the tension, remove the tear strength (2000 edition Table 3, Table 2 edition);
--- The test method has been revised, according to GB/T 328-2007 tested (the 2000 version of Chapter 5, Chapter 6 of this edition);
--- Factory inspection program has been revised, modified type test cycle (2000 version 6.1, this version 7.1).
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 by. China Construction Industry Association waterproof materials, building materials industry and technical supervision research center, China construction chemicals
Building materials company in Suzhou waterproof materials research design.
Participated in the drafting of this standard. Beijing Oriental Yuhong Waterproof Technology Co., Ltd., Xuzhou Woniushan new waterproof materials Co.,
Panjin Yuwang Waterproof Building Materials Group Co., Ltd. Yizhong (Qingdao) Chemical Building Material Co., ICP (Jiangsu) Building Materials Co., Thorpe
Rama (Shanghai) Building Materials Trade Co., Baoding North Waterproof Engineering Company Wenzhou Great Wall Waterproof Material Factory, Dongying Daming waterproof limited liability
Any company, Dalian Xi Yang waterproofing Group Limited, Johns Manville (Shanghai) Co., Ltd. Non-woven, waterproof material Wujiang City Star Limited month
Division Changshu City Heng Building Materials Co., Ltd., Shanghai Industrial Co., Ltd. Taian Engineering, Yangzhou Chi Waterproof Building Materials Co., Ltd., Guangdong
Branch Shun Chemical Industry Co., Ltd., Shanghai Waterproof Building Materials (Group) Corporation, Weifang Hongyuan Waterproof Materials Co., Ltd., Weifang City Yuhong prevention
Water Materials Group Co., Ltd., Weifang City Chenming new waterproof materials Co., Ltd., Panjin Dayu Waterproof Building Materials Co., Ltd., Suzhou Lixing Waterproof
Material Co., Ltd., Hubei Yeongyang waterproof material Co., Ltd., Tangshan De green waterproof material Co., Freudenberg Profits (Shanghai) Trade
Easy Co., Ltd Shaanxi Yan Chang Ningbo Yinzhou Jinsong waterproof materials factory, waterproof Technology Co., Ltd. Xinxiang sun and the moon.
The main drafters of this standard. Zhu Zhiyuan, Yang Bin, Zhu Dongqing, Duan Wenfeng, Zhan Fumin, Li dry, Chenmeng Bin, Zhu Xiaohua, Li Ling, Liuhuan Di,
Fine Young Fan, Zheng Jiayu.
The standard commission Chinese chemical building materials company in Suzhou waterproof materials research and design responsible for the interpretation.
This standard was first released in 2000.
Elastomer modified bitumen membrane
1 Scope
This standard specifies the elastomer modified bitumen membrane (referred to as the SBS waterproofing membrane) classification and marking, materials, requirements, test side
Method, inspection rules, marking, packaging, storage and transportation.
This standard applies to polyester felt, glass mat, glass fiber reinforced polyester mat for the child based, styrene? Butadiene? Styrene (SBS) thermoplastic elastomer
Of the body as asphalt modifier, both sides covered with insulating material made of waterproof membrane.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 328.2 Test methods for building sheets for waterproofing Part 2. bitumen membrane appearance
GB/T 328.4 Test methods for building sheets for waterproofing - Part 4. Bitumen waterproofing - thickness and mass per unit area
GB/T 328.6 Test methods for building sheets for waterproofing - Part 6. Bitumen waterproofing - length, width, flatness
GB/T 328.8 Test methods for building sheets for waterproofing - Part 8. Bitumen 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 Test methods for building sheets for waterproofing Part 14. Bitumen waterproofing membrane low temperature flexibility
GB/T 328.17-2007 Test methods for building sheets for waterproofing Part 17. Bitumen sheets for waterproofing mineral material adhesion
GB/T 328.18 Test methods for building sheets for waterproofing Part 18. Bitumen waterproofing membrane tearing (nail shank)
GB/T 328.20 Test methods for building sheets for waterproofing Part 20. Bitumen sheets for waterproofing the seam peel strength
GB/T 328.26 Test methods for building sheets for waterproofing Part 26. Bitumen sheets for waterproofing soluble content (dip material content)
GB/T 18244 building waterproof materials aging test method
GB/T 18840 bitumen membrane base tires
JC/T 905 elastomer modified asphalt
3 Classification and Marking
3.1 Types
3.1.1 child-into polyester felt (PY), glass fiber mat (G), glass fiber reinforced polyester felt (PYG).
3.1.2 Press the upper surface of the insulating material into polyethylene film (PE), fine sand (S), mineral granule (M). The lower surface of the insulating material is fine sand (S),
Polyethylene film (PE).
NOTE. sand particle diameter of not more than 0.60mm of mineral particles.
3.1.3 according to the material properties are divided into type Ⅰ and Ⅱ.
3.2 Specifications
Coil nominal width of 1000mm.
Polyester felt nominal thickness of the web 3mm, 4mm, 5mm.
Glass fiber mat web nominal thickness of 3mm, 4mm.
Glass fiber reinforced polyester felt sheet nominal thickness of 5mm.
Each volume coil nominal area 7.5m2,10m2,15m2.
3.3 mark
Product by name, type, tread base, on the surface of the material, the lower surface of the material, thickness, size and number of the standard order mark.
Example. 10m2 area, 3mm thick surface mineral granules, the lower surface of polyethylene film I felt polyester type elastomer modified bitumen membrane labeled.
SBSIPYMPE310GB 18242-2008
3.4 Purpose
3.4.1 elastomer modified asphalt waterproofing membrane mainly for industrial and civil construction of the roof and underground works.
3.4.2 Glass fiber reinforced polyester felt sheet can be used to mechanically fixed single ply waterproofing, but by the need to wind load test.
3.4.3 glass fiber mat is suitable for multi-layer waterproof membrane in the bottom of water.
3.4.4 - exposed on the surface of the insulating material using an opaque mineral granules waterproofing membrane.
3.4.5 underground waterproof surface-insulating material for the fine sand of the waterproofing membrane.
4 raw materials
4.1 Modified
Modified asphalt should comply with JC/T 905's.
4.2 tire group
4.2.1 child-only polyester mat, glass mat, glass fiber reinforced polyester felt.
4.2.2 polyester felt with glass fiber mat for the child based shall comply with GB/T 18840 of. Specifications and performance glass fiber reinforced polyester felt should be full
Foot according to the standards for waterproofing requirements.
4.3 surface of the insulating material
The surface of the insulating material shall not use a polyester film (PET) and high temperature resistant polyethylene film.
5 Requirements
5.1 mass per unit area, thickness and area
Mass per unit area, size and thickness should be in accordance with Table 1.
Table 1 mass per unit area, size and thickness
Specifications (nominal thickness) /
mm
On the surface of the material PE S M PE S M PE S M
The lower surface of the material PE PE, S PE PE, S PE PE, S
area/
(M2/roll)
Nominal area 10,15 10,7.5 7.5
Deviation of ± 0.10 ± 0.10 ± 0.10
Mass per unit area/(kg/m2) ≥ 3.3 3.5 4.0 4.3 4.5 5.0 5.3 5.5 6.0
thickness/
mm
Average value ≥ 3.0 4.0 5.0
The smallest single value 2.7 3.7 4.7
5.2 Appearance
5.2.1 Roll roll roll should be wound up together, go out into the end face in must not exceed 10mm.
5.2.2 rolls roll in (4 to 50) ℃ temperature of any product expanded at a distance of 1000mm length of the outer core there should be no more than 10mm
Cracks or bonding.
5.2.3 tread base should be soaked, there should not impregnated place.
5.2.4 membrane surface should be smooth, not allowed to have holes, and the lack of edge cracks, knots, mineral granule size should be uniform and tightly adhered to
Membrane surface.
5.2.5 Each sheet roll joints should not be more than one, short of a length not less than 1000mm, joints should be cut neatly, and extended
150mm.
5.3 Material Properties
Material properties shall comply with the requirements in Table 2.
Table 2 Material Properties
No. Item
index
Ⅰ Ⅱ
PY G PY G PYG
Soluble content/(g/m2)
3mm 2100 -
4mm 2900 -
5mm 3500
Test phenomenon - the child based non-combustible - child-non-combustible -
2 heat-resistant
℃ 90 105
≤mm 2
No experimental phenomena flowing, dripping
3 Low temperature flexibility/℃
-20-25
No cracks
4 impermeability 30min 0.3MPa 0.2MPa 0.3MPa
5 Rally
Maximum peak Rally/(N/50mm) ≥ 500 350 800 500 900
Second peak tensile/(N/50mm) ≥ - - - - 800
Test phenomenon stretching process, the central specimen without a coating of asphalt cracking or separation of the tread base
6 Elongation
When the maximum peak elongation /% ≥ 30
The second peak elongation /% ≥ -
Mass increase /% after immersion in water
PE, S 1.0
M 2.0
Rally retention /% ≥ 90
Elongation retention /% ≥ 80
Low temperature flexibility/℃
-15-20
No cracks
Size change rate /% ≤ 0.7 - 0.7 - 0.3
Mass loss /% ≤ 1.0
9 Permeability of the number of sheets ≤ 2
10 joint peel strength/(N/mm) ≥ 1.5
11 nail shank tear strength a/N ≥ - 300
12 mineral granule adhesion b/g ≤ 2.0
13 membrane surface under the asphalt coating thickness c/mm ≥ 1.0
Artificial gas
Designate acceleration
Ageing
Appearance No sliding, flowing, dripping
Rally retention /% ≥ 80
Low temperature flexibility/℃
-15-20
No cracks
It applies only to a single layer mechanically fixed application methods membrane.
b only applies to mineral granule membrane surface.
c applies only to the construction of the hot-melt web.
6 Test methods
6.1 standard test conditions
Standard test conditions (23 ± 2) ℃.
6.2 Area
According to GB/T 328.6 measure the length and width, and the average value obtained by multiplying the web area.
6.3 Thickness
According to GB/T 328.4 conduct, waterproofing membrane for fine sand surface, sand the surface to remove the re-measurement of the measuring membrane thickness; mineral pellets
Waterproofing membrane, leaving the edges of the web, at 60mm from the edge, after removal of sand measuring the thickness of the web within the range of 1m length.
6.4 mass per unit area
Weighing per roll roll roll weight, based on the area of 6.2 was calculated mass per unit area (kg/m2).
6.5 Appearance
According to GB/T 328.2 conduct.
6.6 Preparation of test pieces
The sample removed from the outer membrane volume header 2500mm, take the 1m-long web press GB/T 328.4 uniform sampling methods and cut
Specimen, shape and number of web performance test pieces in Table 3 and cut.
Table 3 specimen shape and number
No. Test Item
Specimen shape (longitudinal × lateral) /
mm
Quantity /
1 solubles content 100 × 100 3
2 heat resistance of 125 × 100 longitudinal 3
3 Low temperature flexibility 150 × 25 Portrait 10
4 impermeability 150 × 150 3
5 tension and elongation (250 ~ 320) × 50 5 each aspect
6 mass increase after flooding (250 ~ 320) × 50 5 Portrait
7 Heat aging
Tensile and elongation retention (250 ~ 320) × 50 5 each aspect
Low temperature flexibility 150 × 25 Portrait 10
Size and rate of change of mass loss (250 ~ 320) × 50 5 Portrait
8 permeability of 50 × 50 3
9 joint peel strength 400 × 200 (overlapping edges) Portrait 2
10 nail shank longitudinal tear strength of 200 × 100 5
11 mineral aggregates longitudinal adhesion 265 × 50 3
12-sheet surface bituminous coating thickness 200 × 50 3 lateral
Artificial climate
Accelerated aging
Rally retention 120 × 25 5 each aspect
Low temperature flexibility 120 × 25 Portrait 10
6.7 soluble content
According to GB/T 328.26 conduct.
For a nominal roll of fiberglass mat products, after the soluble content test, remove the child-fire ignited, observable phenomena.
6.8 heat resistance
According to GB/T 328.11-2007 in the A method, no flowing, dripping.
6.9 Low temperature flexibility
According to GB/T 328.14 conduct, 3mm thickness of the membrane bending diameter 30mm, 4mm, 5mm thickness of the sheet bend diameter 50mm.
6.10 impermeability
According to GB/T 328.10-2007 in procedure B, using 7-hole plate, on the surface of water meet. On the surface of fine sand, mineral aggregates when, under
Towards the water surface, a lower surface is also at a fine sand, before the test, the lower surface of the sand along the seal ring is removed, and then painted a circle number 60 to 100
Hot asphalt, painted flat after being cooled 1h detection impermeability.
6.11 Tensile and Elongation
According to GB/T 328.8 carried fixture spacing 200mm. Were averaged longitudinal and transverse directions each of five test pieces. Concept testing process
Police in the middle of the specimen occur if a coating of asphalt and child-separation or cracking of a coating of asphalt.
For PYG child-coil need to record two peaks corresponding to the tension and elongation.
6.12 increase in mass after immersion in water
6.12.1 Equipment
6.12.1.1 lid sink.
6.12.1.2 Balance. Accuracy 0.1g.
6.12.1.3 brush.
6.12.1.4 blast oven. Temperature accuracy ± 2 ℃.
6.12.1.5 suspension specimen.
6.12.2 Specimen Processing
For measuring the mass increase specimens, all with a brush to remove surface grit bond is not strong, specimens (50 ± 2) ℃ oven drying
Should not touch. Then immersed (23 ± 2) ℃ water of 7d ± 1h, the specimen should be completely immersed in water. In order to prevent sand off, each specimen is best
They were placed.
6.12.3 Test Procedure
In soaking 7d ± 1h, remove the specimen and the falling sand, at (23 ± 2) ℃, relative humidity (50 ± 5)% of the conditions placed
6.12.4 Calculation Results
Quality increase according to equation (1).
100 (1)
Where.
After the specimen --- handle the increased mass,%;
Taking the arithmetic mean of five test results of the test pieces.
6.13 Thermal Aging
6.13.1 Equipment
6.13.1.1 Balance. Accuracy 0.1g.
6.13.1.2 oven. Temperature accuracy ± 2 ℃.
6.13.1.3 vernier caliper. Accuracy ± 0.02mm.
6.13.2 Specimen Processing
When the elongation after the test specimen can be measured by the size of the rate of change and the loss of quality when longitudinal tension retention and maximum tension, controversial
With a new test specimen.
For measuring tensile retention, elongation retention, dimensional change rate and low temperature flexibility test pieces flat on a glass plate sprinkled with talcum powder
, And then the specimen placed horizontally adjusted to (80 ± 2) ℃ in the oven at this temperature treatment 10d ± 1h.
Determination of loss in the quality of the test piece and cut by 6.6, all with a brush to remove surface grit bond is not strong. Specimens (50 ± 2) ℃
The dimension change of specimen length with vernier caliper specimen (L1).
The specimen during the drying process and should not be placed in contact with each other. The mass loss test piece placed in the release paper, other specimens have spread flat on
Talcum powder on the glass, and then put the specimen level has been adjusted to the oven (80 ± 2) ℃, the temperature in this process 10d ± 1h.
6.13.3 Test Procedure
In the heat treatment 10d ± 1h, remove the specimen placed 2h ± 5min under standard test conditions.
For tensile specimen retention, immediately by 6.11 tensile test.
For low temperature flexibility specimens tested immediately by 6.9.
For the dimensional change of the test piece, immediately measuring the position of L1 original specimen length measured (L2).
6.13.4 Calculation Results
6.13.4.1 tensile elongation retention and retention
Rally retention according to equation (2).
Rt = TS '/ TS × 100 (2)
Where.
After Rt --- specimen handling Rally retention,%;
--- The TS average tensile test piece before the treatment, in units of Newton per 50 mm (N/50mm);
After TS '--- average tensile test pieces treated in Newtons per 50 mm (N/50mm).
Rally retention rate calculated using the average of five specimens.
Elongation retention with reference to formula (2) calculation.
For PYG tire-based products, in order to pull retention peak value calculation.
For PYG tire-based products, elongation retention rate calculations to the second peak elongation.
6.13.4.2 Low temperature flexibility
Recording surface of the specimen for cracks.
6.13.4.3 dimensional change
The size of the rate of change of each specimen according to formula (3) Calculated.
D = L2-L1L1 ×
100 (3)
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.
6.13.4.4 mass loss
Mass loss by the formula (4) Calculated.
100 (4)
Where.
Loss of quality --- specimen processing,%;
Taking the arithmetic mean of five test results of the test pieces.
Permeability of 6.14
6.14.1 Equipment
6.14.1.1 oven. Temperature accuracy ± 2 ℃.
6.14.1.2 paper. speed qualitative filter paper.
6.14.2 Preparation of test pieces
PE film under the surface of the specimen for testing or fine sand will be removed to remove the reference method GB/T 328.11.
6.14.3 Test Procedure
The specimens were handled well on the 5th floor of a diameter greater than the test piece of filter paper, filter paper underlay glazed pressure 1kg of weight above the specimen,
The specimen is then placed in the heat resistance has been adjusted to a predetermined temperature in an oven, horizontal 5h ± 15min, then standard test conditions decentralized
Set 1h, check the number of sheets permeability.
6.14.4 Calculation Results
Where there are signs of contamination of filter paper are counted as leaking, up to three specimens of exudation number of sheets as the test result.
6.15 joint peel strength
According to GB/T 328.20 conducted in the web longitudinal lap at the edges of the hot-melt method lap, take five test pieces average peel strength level
Mean.
6.16 Shank tear strength
According to GB/T 328.18 conduct, averaging five longitudinal specimens.
Mineral pellets 6.17 adhesion
According to GB/T 328.17-2007 in B method, take the average of the three specimens.
Surface bituminous coating thickness at 6.18 membrane cap
Press clipping 6.6 specimens, each specimen measuring two points, the distance measured in the middle of each 50mm thickness at the press GB/T 328.4 measured specimen
Amount, taking an average of two points. Then go to the web with a hot shovel blade under the surface of the coating was until the tread base, let it cool down to the standard test conditions, again
Each specimen measuring the thickness of the original two, averaging two points. Twice the difference between the average thickness before and after each test piece, is the block sample
The average value of the asphalt coating thickness, taking three specimens of the lower surface of the lower surface of the web as an asphalt coating thickness.
6.19 artificial climate accelerated aging
According to GB/T 18244, and adopt the xenon arc lamp method, the cumulative radiation energy 1500MJ/m2 (illumination time of about 720h).
After aging, the appearance of the specimen checking; retention rate by 6.11 tensile test fixture spacing 70mm, calculated according to 6.13.4.1; low temperature
Press the test of 6.9.
7 Inspection rules
7.1 Inspection classification
By inspection type into the factory inspection, periodic inspection and type testing.
7.2 factory inspection
Factory inspection items comprising. a mass per unit area, area, thickness, appearance, soluble content, water impermeability, heat resistance, low temperature flexibility, tensile
Strength, elongation, permeability, surface bituminous coating thickness under the membrane.
7.3 Periodic Inspection
Periodic inspection items thermal aging, at least once every three months.
7.4 Type inspection
Type inspection items include all the requirements of Chapter 5 provides that type inspection in the following cases.
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) factory inspection results are quite different and the last type test results;
e) Discontinued for three months or more to resume production;
f) the national quality supervision and inspection bodies type inspection requirements.
7.5 Batch
In the same type, the same size as the number of 10000m2, 10000m2 also insufficient as a group.
7.6 Sampling
In each batch were randomly selected five books of mass per unit area, area, thickness and appearance inspection.
7.7 determine the rules
7.7.1 individual judgment
7.7.1.1 mass per unit area, area, thickness and appearance
When the five volumes of the samples taken are in line with the provisions of 5.1 and 5.2, the contractor for the mass per unit area, size, thickness and appearance of compliance. If one has a
Item does not meet the requirements, the batch of products are allowed from five volumes were randomly selected sample of failed items for review. Such as with all the standard requirements
It is judged as qualified; otherwise, this batch of product failure.
7.7.1.2 Material Properties
From the mass per unit area, area, thickness and appearance of any qualified web were taking a roll of material properties testing.
7.7.1.2.1 soluble content, tensile, elongation, water absorption, heat resistance, peel strength of the seam, the shank tear strength, adhesion to mineral granule
Sex, asphalt coating thickness reaches its arithmetic mean of the standard indicators sentence under the membrane surface is qualified.
7.7.1.2.2 impermeability to three specimens reached the qualifying standard for the sentence.
7.7.1.2.3 low temperature flexibility when both sides reached the qualifying standard for the sentence.
7.7.1.2.4 Permeability of the maximum value prescribed standards judged as it passes.
7.7.1.2.5 heat aging, artificial climate accelerated aging is the result of the determination to achieve the qualifying time specified in Table 2.
7.7.1.2.6 the test results are in line with the provisions of Table 2, the material properties of this batch of qualified products. If an indicator of non-compliance,
It allows batch products were randomly selected in five volumes, from any failure to take the roll of individual items retest. It reached the standard, then the sentence
Batch material...
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