1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58non-structural lumber productsICS 83.180Specifications for adhesives used for finger joints in BRIT
2、ISH STANDARDBS ISO 17087:2006BS ISO 17087:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 December 2006 BSI 2006ISBN 0 580 49844 1Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct
3、application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI. It is the UK implementation of ISO 17087:2006. The UK participation in its preparation was entrusted to Technical Committee PRI/52, Adhesives.A li
4、st of organizations represented on PRI/52 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a Reference numberISO 17087:2006(E)INTERNATIONAL STANDARD ISO17087First edition2006-11-15Specifications for adhesives used for finger joi
5、nts in non-structural lumber products Spcifications pour des adhsifs utiliss pour des aboutages dans des produits en bois non structuraux BS ISO 17087:2006ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 General principles. 2 5 Apparatus and materia
6、ls 3 6 Requirements 4 7 Test specimens . 4 8 Moisture content and conditioning. 7 9 Test procedures Flexure and tension 7 10 Exposure conditions 10 11 Expression of results . 12 12 Precision 12 Annex A (informative) Report forms. 13 Annex B (informative) Reading wood failure in finger joints. 20 Bib
7、liography . 22 BS ISO 17087:2006iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body in
8、terested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechni
9、cal Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the
10、 technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.
11、 ISO shall not be held responsible for identifying any or all such patent rights. ISO 17087 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products. Based with permission of ASTM, on ASTM D 5572, Standard Specification for Adhesives Used for Finger Joints in Nonstructur
12、al Lumber Products. BS ISO 17087:20061Specifications for adhesives used for finger joints in non-structural lumber products 1 Scope This International Standard specifies performance levels for adhesives to be used in finger joints in nonstructural bonded lumber products. Such products include, but a
13、re not limited to, interior and exterior mouldings, window and door components or parts, and bonded lumber panels. Adhesives that meet the requirements of the various performance classes are considered capable of providing an adequate bond for use under the conditions described for the class. This s
14、pecification is intended to be used to evaluate adhesives as well as the adhesive bonds in the finger joints. 2 Normative references The following referenced documents are indispensable for the application of this International Standard. For dated references, only the edition cited applies. For unda
15、ted references, the latest edition of the referenced document (including any amendments) applies. ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system 3 Terms and defini
16、tions For the purposes of this document, the following terms and definitions apply. 3.1 bond union between materials produced using adhesives 3.2 finger joint joint formed by bonding two precut members shaped like fingers (see Figure 1) a) Horizontal joint b) Vertical joint Key 1 face 2 edge Figure
17、1 Finger joint BS ISO 17087:20062 3.3 dry-use nonstructural adhesive adhesive capable of producing sufficient strength and durability to make the bonded lumber product serviceable in nonstructural use, under conditions in which the equilibrium moisture content (EMC) of the wood does not exceed 16 %
18、3.4 wet-use nonstructural adhesive adhesive capable of producing sufficient strength and durability to make the bonded lumber product serviceable in nonstructural use, under conditions in which the EMC of the wood may be 16 % or greater 3.5 equilibrium moisture content EMC moisture content at which
19、wood neither gains nor loses moisture to the surrounding air NOTE Adapted from ASTM D 9. 3.6 moisture content MC amount of water contained in the wood, usually expressed as a percentage of the mass of the oven-dry wood NOTE Adapted from ASTM D 9. 4 General principles 4.1 Adhesives are classified as
20、dry-use or wet-use. Each classification includes consideration of short-term in-transit exposure conditions at elevated temperatures up to 104 C. NOTE This specification reflects results obtained with laboratory-made specimens compared to those obtained with industrially manufactured specimens. Thes
21、e finger joints were prepared using previously certified adhesives in cooperation with a manufacturer or equipment supplier who had the necessary finger joint cutter and assembly equipment. Such finger joints may vary in geometry and length from manufacturer to manufacturer, and this variation could
22、 affect the performance of the bonded finger joint assembly. Figure 2 depicts a typical finger joint configuration. 4.2 When changes are made in the design of industrially manufactured finger joints, the new design should preferably be compared to a control design that has been used successfully. 4.
23、3 An industrially made finger joint assembly should preferably be evaluated using the requirements for compliance with this specification. When this specification is used to evaluate specimens made from laboratory-made assemblies, the results may not compare favourably with those obtained with speci
24、mens made from industrially made assemblies. 4.4 Test requirements are provided to determine if the adhesive is suitable for dry use or wet use. 4.5 The dry test and exposure conditions and treatments are to evaluate adhesives used in nonstructural finger joints for typical service conditions. 4.6 T
25、he 104 C test is a more severe test designed to evaluate the product after exposure to short-term elevated-temperature conditions. This test is intended to simulate conditions that might be experienced in transit, during further processing or in service conditions. NOTE Service conditions could typi
26、cally include stress and time under stress, as well as elevated temperature. 4.7 Procedures are described in sufficient detail to permit duplication in different test laboratories. To avoid potential problems that would be caused by interrupting the bonding process, the adhesive performance level sh
27、ould preferably be determined by the finger joint manufacturer prior to handling and early shipment. BS ISO 17087:20063Before beginning the full testing process, the test laboratory should preferably take a representative sample and check the dry strength first, in order to ensure that the product b
28、asically conforms to the dry-strength performance level certified by the adhesive manufacturer. Key a height of joint 33 mm f length of finger 6 mm wtwidth of finger tip 1 mm wbwidth of finger base 2 mm s slope of finger 5 NOTE The dimensions given are examples for a typical horizontal finger joint.
29、 Figure 2 Example of cross-section of finger joint test specimen 5 Apparatus and materials 5.1 Tensile-testing machine, capable of maintaining a pre-determined constant crosshead rate. The machine shall be capable of determining a maximum load. The measured strength shall be between 15 % and 85 % of
30、 the capacity of the machine. The machine shall permit the measurement and recording of the applied force with an uncertainty of 1 % or better. The machine shall have a capacity of not less than 9 800 N in compression, shall be equipped for one-third-span, two-point loading for the flexure test as d
31、escribed in 9.1 and shown in Figure 3, shall be equipped with grips of sufficient length to hold the specimen firmly, preferably with a minimum length of 63 mm and minimum width of 19 mm, and shall be located in an atmosphere such that the moisture content of the specimen is not noticeably altered d
32、uring testing. The equipment shall be calibrated regularly in accordance with ISO 7500-1. It is recommended that the machine be autographic, giving a chart that can be read in terms of millimetres of crosshead movement as one coordinate and applied force as the other coordinate. It is also recommend
33、ed that inertialess equipment be used. The finger joint specimens to be broken in tension are shorter than those to be broken in flexure. Accommodation shall be made in the equipment for handling the larger flexure specimen. 5.2 Environmental chamber, capable of conditioning specimens at (23 2) C an
34、d (65 5) % relative humidity, having a capacity for at least 20 specimens well spaced and supported on racks to allow free air flow. BS ISO 17087:20064 5.3 Oven(s), with sufficient air circulation to remove moisture from the oven chamber, capable of meeting all the following temperature requirements
35、: (41 2) C (see 10.2.3), (65 2) C (see 10.2.6 and 10.3.3), (104 2) C (see 10.2.4, 10.2.5 and 10.3.4) and (110 2) C (see 10.2.4). 5.4 Specimen-soaking tank, having a capacity meeting the requirements of 10.2.3, so that all of the specimens are at least 50 mm below the water level for the duration of
36、the soak cycles. 5.5 Specimen-boiling tank, having a capacity meeting the requirements of 10.3.3, so that all of the specimens are at least 50 mm below the water level for the duration of the boil cycles. 5.6 Vacuum/pressure vessel, having a capacity meeting the requirements of 10.3.5, so that all o
37、f the specimens are at least 50 mm below the water level for the duration of the vacuum/pressure cycles. 5.7 PVDC wrap: poly(vinylidene chloride) film for wrapping test specimens. 6 Requirements 6.1 To demonstrate compliance with this specification, the test adhesive shall be tested for performance
38、in accordance with Clauses 9 and 10, and it shall meet the requirements in Table 1 for the selected test mode and performance classification. 6.2 Compliance with this specification shall warrant certification of the adhesive for use on the species of wood that is used for the tests, or for use on a
39、designated group of species when tested and found to be in compliance for any one member of said group of species. The designated species groupings for commonly used woods, as accepted in this specification, are given in Table 2. In the event that the user or supplier of the adhesive, or both, canno
40、t accept the designated groupings in Table 2, either party shall have the option of requesting a test on an individual species. Furthermore, the user and supplier may agree to change any of the wood-failure requirements of Table 1 when applied to tests on group 3 and 4 hardwoods in Table 2. 6.3 The
41、wood-failure requirements listed in Table 1 are given for softwoods and hardwoods. 6.4 An industrially manufactured finger joint may be used to evaluate the adhesive, provided its construction meets the requirements set forth in Clauses 7 to 10, and the joint is tested against the requirements in Ta
42、ble 1. 7 Test specimens 7.1 Prepare the finger joint assemblies in cooperation with a wood-products manufacturer, an equipment manufacturer or a laboratory having all of the proper equipment. 7.2 Use lumber that conforms to the following requirements: maximum slope of grain of 7 % (1 in 14) on any f
43、ace or edge; EMC of 8 % to 12 %, preferably brought to 10 % to 12 % MC prior to cutting and bonding; free of knots and decay; free of machining defects such as chipped grain, feed-roll polish, coarse knife marks and feed-roll compression; free of drying effects such as case hardening, collapse and s
44、plits or checks. Recommended minimum specific gravities are given in Table 3. Finger joints shall be cut on the day the assemblies are to be made. See Clause 6 for species compliance rules relative to testing, and Table 2 for information on the bondability of some species of wood. 7.3 Follow the adh
45、esive manufacturers instructions for conditions and procedures for preparing and applying the adhesive, as well as for assembling, pressing and curing the assembly. 7.4 For each exposure condition within the unique performance classification, a test group shall consist of 20 specimens representing a
46、t least four different assemblies with no more than five specimens for each assembly. BS ISO 17087:20065Table 1 Minimum test requirements Test mode: tensionbTest mode: flexure Wood failuredGroup averagee% Individual minimumf% Performance classification and exposure conditionsaSubclause number for ex
47、posure description StrengthcMPa Soft-wood Hard-woodhSoft-wood Hard-woodhStress at rupturec(min.g) MPa Dry use: Cured (dry) 10.2.2 13,8 60 30 30 15 13,8 Three-cycle soak 10.2.3 6,9 30 15 15 6,9 Elevated-temperature test method 1 (104 C) Elevated-temperature test method 2 (104 C) 10.2.4 10.2.5 6,9 6,9
48、 Temperature/humidity (65 C, 16 % EMC) 10.2.6 5,2 Wet use: Cured (dry) 10.3.2 13,8 60 30 30 15 13,8 Boil 10.3.3 11,0 50 25 25 9,7 Elevated temperature (104 C) 10.3.4 6,9 Vacuum/pressure 10.3.5 11,0 50 25 25 9,7 aTwenty specimens required for each classification and exposure. bParallel to the grain.
49、cTension and flexure results may vary with the species. To be acceptable, a wood shall produce joints able to meet these requirements. dThe wood-failure requirements are given for softwoods and hardwoods. Group 3 and 4 hardwoods are listed at 50 % of the softwood value, with no wood-failure requirement if the calculated value is 15 % or less. eFor total group of specimens tested. f90 % of the specimens tested shall meet or exceed the minimum wood-failure per
