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ASTM D4225-03

(Specification)

Standard Specification for Styrene-Butadiene Sheeting (Withdrawn 2009)

Standard Specification for Styrene-Butadiene Sheeting (Withdrawn 2009)

ABSTRACT
This specification covers styrene-butadiene sheeting in thicknesses of 0.25 mm [0.01 in.] and greater. Sheeting conforming to this specification is intended for use in instrument housings and applications requiring resistance to impact. Methods of fabrication may require that the sheet be drawn or bent. The styrene-butadiene sheeting is classified by type as follows: type I - low shrinkage, type II - intermediate shrinkage, and type III - high shrinkage. The styrene-butadiene sheeting is further divided into classes and sizes as follows: class 1 - natural, class 2 - as specified by user, size A - 0.5 by 1 m, and size B - as specified by user. The impact strength, Vicat softening temperature, flow rate, and tensile stress at yield of the material shall be tested to meet the requirements specified. The orientation, and warpage or twist shall be tested to meet the requirements prescribed.
SCOPE
1.1 This specification covers styrene-butadiene sheeting in thicknesses of 0.25 mm (0.01 in.) and greater. Sheeting conforming to this specification is intended for use in instrument housings and applications requiring resistance to impact. Methods of fabrication may require that the sheet be drawn or bent.  
1.2 This specification covers natural and colored sheeting.  
1.3 This specification covers quality requirements that include degree of orientation, amount of warpage or twist, dimensions, tolerances, and workmanship.  
1.4 The values stated in SI units are to be regarded as the standard. The SI units given in parentheses are for information only.
1.5 The following precautionary statement pertains to the test method portion only, Section 12, of this specification: This standard does not purport to address the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
WITHDRAWN RATIONALE
This specification covered styrene-butadiene sheeting in thicknesses of 0.25 mm (0.01 in.) and greater. Sheeting conforming to this specification was intended for use in instrument housings and applications requiring resistance to impact. Methods of fabrication may require that the sheet be drawn or bent.
Formerly under the jurisdiction of Committee D20 on Plastics, this specification was withdrawn in April 2009. This standard is being withdrawn without replacement due to its limited use by industry.

General Information

Status
Withdrawn
Publication Date
09-Jul-2003
Withdrawal Date
31-Mar-2009
ICS
83.140.10 - Films and sheets
Technical Committee
D20 - Plastics
Drafting Committee
D20.19 - Film, Sheeting, and Molded Products
Current Stage
Ref Project

Relations

Replaces
ASTM D4225-97 - Standard Specification for Styrene-Butadiene Sheeting
Effective Date
10-Jul-2003

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ASTM D4225-03 - Standard Specification for Styrene-Butadiene Sheeting (Withdrawn 2009)ASTM D4225-03 - Standard Specification for Styrene-Butadiene Sheeting (Withdrawn 2009)
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ASTM D4225-03 - Standard Specification for Styrene-Butadiene Sheeting (Withdrawn 2009)
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D 4225 – 03
Standard Specification for
1
Styrene-Butadiene Sheeting
This standard is issued under the fixed designation D 4225; 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
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
3
1. Scope* D 1898 Practice for Sampling of Plastics
D 2732 Test Method for Unrestrained Linear Thermal
1.1 This specification covers styrene-butadiene sheeting in
4
Shrinkage of Plastic Film and Sheeting
thicknesses of 0.25 mm [0.01 in.] and greater. Sheeting
4
D 3892 Practice for Packaging/Packing of Plastics
conforming to this specification is intended for use in instru-
D 4549 Specification for Polystyrene and Rubber-Modified
ment housings and applications requiring resistance to impact.
5
Polystyrene Molding and Extrusion Materials (PS)
Methods of fabrication may require that the sheet be drawn or
D 5033 Guide for the Development of ASTM Standards
bent.
5
Relating to Recycling and Use of Recycled Plastics
1.2 This specification covers natural and colored sheeting.
6
2.2 Federal Standard:
1.3 This specification covers quality requirements that in-
Fed. Std. No. 406, Plastics: Methods of Testing
clude degree of orientation, amount of warpage or twist,
(Method 6051, Warpage)
dimensions, tolerances, and workmanship.
7
2.3 Military Standard:
1.4 The values stated in SI units are to be regarded as the
MIL-STD-105 Sampling Procedures and Tables for Inspec-
standard. The units given in brackets are for information only.
tion by Attributes
1.5 This specification allows for the use of recycled plastics
as defined in Guide D 5033.
3. Terminology
1.6 The following precautionary statement pertains to the
3.1 Definitions:Unlessotherwiseindicated,theterminology
test method portion only, Section 12, of this specification: This
used in this specification is in accordance with definitions
standard does not purport to address the safety concerns, if
given in Terminology D 883.
any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health
4. Classification
practices and determine the applicability of regulatory limita-
4.1 The styrene-butadiene sheeting in accordance with this
tions prior to use.
specification is classified by Type (see Table 1) as follows:
NOTE 1—There is no known ISO equivalent to this standard.
4.1.1 Type I—Low shrinkage.
4.1.2 Type II—Intermediate shrinkage.
2. Referenced Documents
4.1.3 Type III—High shrinkage.
2.1 ASTM Standards:
4.2 The styrene-butadiene sheeting is further divided into
D 256 Test Methods for Determining the Izod Pendulum
classes as follows:
2
Impact Resistance of Plastics
4.2.1 Class 1 - Natural
2
D 618 Practice for Conditioning Plastics for Testing
4.2.2 Class 2 - As specified by user
2
D 638 Test Method for Tensile Properties of Plastics
4.3 Sizes
2
D 883 Terminology Relating to Plastics
4.3.1 Size A: 0.5 by 1 m.
D 1238 Test Method for Flow Rates of Thermoplastics by
4.3.2 Size B: as specified by user.
2
Extrusion Plastometer
D 1525 Test Method for Vicat Softening Temperature of
2
Plastics
3
Discontinued; see 1997 Annual Book of ASTM Standards, Vol 08.01.
1 4
This specification is under the jurisdiction of ASTM Committee D20 on Annual Book of ASTM Standards, Vol 08.02.
5
Plastics and is the direct responsibility of Subcommittee D20.19 on Film and Annual Book of ASTM Standards, Vol 08.03.
6
Sheeting. Available from Superintendent of Documents, U.S. Government Printing
Current edition approved July 10, 2003. Published September 2003. Originally Office, North Capital and H Sts., NW, Washington, DC 20401.
7
approved in 1983. Last previous edition approved in 1997 as D 4225 – 97. Available from Standardization Documents, Order Desk, Bldg. 4 Section D,
2
Annual Book of ASTM Standards, Vol 08.01. 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D4225–03
A
TABLE 1 Orientation (Percent Shrinkage)
6.2 Manufacture—Sheeting shall be formed by extrusion
Sheet Thickness Type 1 Type II Type III molding and press polished. Sheeting shall be annealed if
mm [in.] % % %
necessary to assure compliance with the orientation require-
0.25 to 0.50 < 30 30 to 60 > 60
ment of 7.2.
[0.010 to 0.020]
>0.50 to 1.00 < 20 20 to 50 > 50
7. Specific Requirements
[>0.020 to 0.039]
7.1 Form—The material shall be furnished in the form of
>1.00 to
...

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SIGNIFICANCE AND USE
4.1 Test Methods A and B are used to establish the weight of the dart when 50 % of the specimens fail under the conditions specified. Data obtained by one test method cannot be compared directly with the other test method nor with those obtained from tests employing different conditions of missile velocity, impinging surface diameter, effective specimen diameter, material construction and finish of the dart head, and film thickness. The values obtained by these test variables are highly dependent on the method of film fabrication.  
4.2 The results obtained by Test Methods A and B are greatly influenced by the quality of film under test. The confidence limits of data obtained by this procedure can, therefore, vary significantly, depending on the sample quality, uniformity of film gage, die marks, contaminants, etc.  
4.3 Test Methods A and B have been found useful for specification purposes.  
Note 4: With sufficient data, correlation between test results and field performance can usually be established.  
4.4 The impact resistance of plastic film, while partly dependent on thickness, has no simple correlation with sample thickness. Hence, impact values cannot be normalized over a range of thickness without producing misleading data as to the actual impact resistance of the material. Data from these test methods are comparable only for specimens that vary by no more than ±25 % from the nominal or average thickness of the specimens tested.  
4.5 Several impact test methods are used for film. It is sometimes desirable to know the relationships among test results derived by different test methods. A study was conducted in which four films made from two resins (polypropylene and linear low-density polyethylene), with two film thicknesses for each resin, were impacted using Test Methods D1709 (Method A), D3420 (Procedures A and B), and D4272. The test results are shown in the Appendix. Differences in results between Test Methods D1709 and D4272 are not unusual since...
SCOPE
1.1 These test methods cover the determination of the energy that causes plastic film to fail under specified conditions of impact of a free-falling dart. This energy is expressed in terms of the weight (mass) of the missile falling from a specified height which would result in 50 % failure of specimens tested.  
1.2 Two test methods are described:  
1.2.1 Test Method A employs a dart with a 38.10 ± 0.13-mm (1.500 ± 0.005-in.) diameter hemispherical head dropped from a height of 0.66 ± 0.01 m (26.0 ± 0.4 in.). This test method can be used for films whose impact resistances require masses of about 50 g to about 6 kg to fracture them.  
1.2.2 Test Method B employs a dart with a 50.80 ± 0.13-mm (2.000 ± 0.005-in.) diameter hemispherical head dropped from a height of 1.52 ± 0.03 m (60.0 + 0.25, −1.70 in.). Its range of applicability is from about 0.3 kg to about 6 kg.  
1.3 Two testing techniques are described:  
1.3.1 The standard technique is the staircase method. By this technique, the missile weight employed during the test is decreased or increased by uniform increments after the testing of each specimen, depending upon the result (fail or not fail) observed for the specimen.  
1.3.2 The alternative technique provides for testing specimens in successive groups of ten. One missile weight is employed for each group and the missile weight is varied in uniform increments from group to group.  
1.3.3 The staircase technique and the alternative technique give equivalent results both as to the values of impact failure weight which are obtained and as to the precisions with which they are determined.  
1.4 The values stated in SI units are to be regarded as standard. The values stated in parentheses are for information only.
Note 1: Tests on materials that do not break, for any reason, are not considered to be valid. It has been noted that certain materials may stretch so far as to bottom out at the base of certain ...

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  • Standard
    9 pages
    English language
    sale 15% off