1、m 7009276 0025978 262=Designation:D 2530-81 STb AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race St.,Philadelphia,Pa.19103 Reprinted from the Anpual Book of ASTM Standards,Copyright ASTM If not listed in the current combined index,will appear in the next edition.Standard Specification for NONORI
2、ENTED PROPYLENE PLASTIC FILM This standard is issued under the fixed designation D 2530;the number immediately following the designation indicates the year of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A supers
3、cript epsilon(e)indicates an editorial change since the last revision or reapproval.1.scope 1.1 This specification covers the classification of nonoriented(Note I)polypropylene fdm up to 0.25 mm(0.010 in.)in thickness.The f i l m may contain colorants,stabilizers,or other ad-ditives,for example,for
4、the improvement of the surface properties.NOTE 1-Nonoriented film describes a product prepared directly by either the water bath or chill roll process and which has not been intentionally stretched in one or more directions.1.2 The values stated in SI units are to be regarded as the standard.2.Appli
5、cable Documents.*2.1 ASTM Standards:D 374 Tests for Thickness of Solid Electrical nsuiation D 618 Conditioning Piastics and Electrical Insulating Materials for Testing3 D882 Test for Tensile Properties of Thin Plastic Sheeting4 D 1003 Test for Haze and Luminous Trans-mittance of Transparent Plastics
6、4 D 1505 Test for Density of Plastics by the Density-Gradient Technique4 D 1894 Ttst for Static and Kinetic Coeffi-cients of Friction of Plastic Film and Sheet ing4 D 1898 Recommended Practice for Sampling of Plastic4 D2457 Test for Specular Gloss of Plastic Films4 D 3892 Practice for Packaging/Pack
7、ing of Plastics4 2.2 Military Standard:MIL-STD-105 Sampling Procedures and Ta-bles for Inspection by Attributes5 3.Classification 3.1 The f i l m covered in this specification 1 shall be designated by a type number composed by listing the desired cell limit for each specified property in the order s
8、hown in Table 1.NOTE 2-An example of this classification system is:Haze(1.O to 3.0)I Gloss(80 to 90)Coeficient of friction(0.2 to 0.5)1%secant modulus(71 o00 to Elongation at break(400 to 600)This type number represents a high-quality film typical of the material being sold currently for over-wrap a
9、pplications.If a particular property were not considered to be important in the intended application,it could be omitted and replaced with a zero in the type number.For example,if coefficient of friction were not con-sidered important in the type number just given,the type number would be 22022.With
10、 this type of classification it is possible to describe a f i l m with a combination of properties that would be impossible to manufacture with the present state of technology.For this reason it is advisable for persons using the specification for the first time to contact the film suppliers to dete
11、rmine what films are available before specifying any particular type num-ber.4.General Requirements 4.1 Appearance-The material shall have ap-pearance qualities conforming with those pro-duced by good commercial practice.It shall be Type Number 100 OOO)This specification is under the jurisdiction of
12、 ASTM Committee D-20 on Plastics and is the direct responsibility of Subcommittee D20.19 on Sheeting.Current edition approved June 26,1981.Published Oc-tober 1981.Originally published as D 2530-66T.Last pre-vious edition D 2530-80.Annual Book of ASTM Standards,Parts 35 and 39.Annual Book o f ASTM St
13、andards,Parts 22.35,and 39.Available from Naval Publications and Forms Center,Annual Book of ASTM Standards,Part 35.5801 Tabor Ave.,Philadelphia,Pa.19120.NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the late
14、st information.as free as commercially possible of gels,streaks,pinholes,particles of foreign matter,and un-dispersed raw material.There shall be no other visible defects such IS holes,tears,or blisters.The edges shall be free of nicks and cuts visible to the unaided eye.There shall be no visible ev
15、idence of damage from shipping.4.2 Thickness Tolerances-The point-to-point thickness tolerances of the f i l m or sheet-ing covered in this specification shall be as prescribed in Table 2.4.3 Yield Tolerances-The actual yield of film covered in this specification shall be within the tlerance h i t s
16、 of the nominal yield as prescribed in Table 3.In cases where each roll,blanket,or unit of production is packaged and marked by the producer as the ultimate con-sumer sales unit with stated dimensions,the single-roll tolerances for yield shall apply.4.4 Width Tolerances-The tolerance for width shail be k3.0 mm(0.12 in.)of the nom-inal width or as agreed upon by the purchaser and the manufacturer(or supplier).4.5 Length-The length of f i l m and number of splices per roll shall be as agreed upon
