GB/T 2790-1995 PDF EnglishUS$70.00 · In stock · Download in 9 seconds
GB/T 2790-1995: Adhesives, 180-degree peel strength test method for a flexible-bonded-to-rigid test specimen assembly Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure GB/T 2790: Historical versions
GB/T 2790-1995: Adhesives, 180-degree peel strength test method for a flexible-bonded-to-rigid test specimen assembly---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT2790-1995 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA Replacing GB 2790-81 Adhesives, 180 Peel Strength Test Method for a Flexible-bonded-to-rigid Test Specimen Assembly APPROVED ON. DECEMBER 20, 1995 Implemented on. AUGUST 1, 1996 Issued by. The Quality and Technology Supervision Bureau of the People’s Republic of China. Table of Contents1 Main Content and Scope of Application... 3 2 Normative References... 3 3 Principle... 3 4 Devices... 3 5 Test Specimens... 4 6 Conditioning and Test Environment... 6 7 Test Procedures... 6 8 Processing of Test Result... 7 9 Test Report... 8 Additional information... 9 Adhesives, 180 Peel Strength Test Method for a Flexible-bonded-to-rigid Test Specimen Assembly This Standard equivalently adopts ISO 8510-2.1990 Adhesives - Peel Test for a Flexible-bonded-to-rigid Test Specimen Assembly - Part 2.180 Degree Peel.1 Main Content and Scope of ApplicationThis Standard stipulates the devices, test specimen preparation, test procedures and result processing of 180 peel test of adhesive test specimens bonded by flexible materials and rigid materials. This Standard is applicable to the determination of adhesives’ resistance against 180 peeling under the stipulated conditions. The adhesive test specimens are constituted of two bonded materials (flexible materials and rigid materials).2 Normative ReferencesGB 2918 Plastics - Standard Atmospheres for Conditioning and Testing3 PrincipleUse two pieces of bonded materials and adhesives to prepare adhesive test specimens.4 Devices4.1 Tensile Test Device The device shall have an appropriate range of load; the chuck shall be able to separate and impose tensile force at a constant rate. This device shall be equipped with a measurement system and indicating/recording system of force. 4.2 Chuck One of the chucks shall be able to firmly clamp the rigid bonded piece (see 5.1.1); and make the adhesive surface parallel to the imposed force. The other chuck (see Figure 1) shall be able to fixate the flexible bonded piece (see 5.1.2); this chuck is self- calibrated.5 Test Specimens5.1 Bonded Materials The thickness of bonded materials should be able to endure the estimated tensile force. The dimensions of bonded materials shall be accurately measured and written into test report. 5.1.1 Rigid bonded test specimens The width of rigid bonded test specimens shall be. 25.0 mm ± 0.5 mm, unless it is otherwise stipulated1; the length shall be. above 200 mm, long strips. 5.1.2 Flexible bonded test specimens Flexible bonded test specimens shall be able to bend 180 without manifesting any severe and irrevocable deformation. Unless it is otherwise stipulated, the length of flexible bonded test specimens shall be not less than 350 mm. The width is. 5.2 Preparation of Test Specimens In accordance with the instructions of adhesives, conduct surface treatment2 of test specimens and apply adhesives. Place a coating of gum on the whole width of each piece of bonded test specimen; the length of the coated gum shall be 150 mm. 5.3 Quantity of Test Specimens The quantity of each batch No. of test specimens shall be not less than 5.6 Conditioning and Test EnvironmentTest specimens shall be conditioned and tested under the standard environment stipulated in GB 2918.The time of conditioning of test specimens shall be not less than 2 h3.7 Test ProceduresBend the unbonded side of flexible bonded test specimen by 180; firmly clamp the rigid bonded test specimen on a fixated chuck; firmly clamp the flexible bonded test specimen on the other chuck.8 Processing of Test ResultIn terms of each sample, through the relationship curve of peel force and peel length, determine the average peel force, expressed in (N). Peel length, which is used in the calculation of peel force, shall be at least 100 mm, but it shall not include the initial 25 mm. An estimated contour line (see Figure 2) may be marked, or, area measurement method may be adopted to obtain the average peel force. If a more accurate result is requested, other appropriate methods may also be adopted.9 Test ReportTest report includes the following parts. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 2790-1995 be delivered?Answer: The full copy PDF of English version of GB/T 2790-1995 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 2790-1995_English with my colleagues?Answer: Yes. 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