{"id":372441,"date":"2024-10-20T02:29:18","date_gmt":"2024-10-20T02:29:18","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-114432021\/"},"modified":"2024-10-26T04:20:24","modified_gmt":"2024-10-26T04:20:24","slug":"bs-iso-114432021","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-114432021\/","title":{"rendered":"BS ISO 11443:2021"},"content":{"rendered":"

This document specifies methods for determining the fluidity of plastics melts subjected to shear stresses at rates and temperatures approximating to those arising in plastics processing. Testing plastics melts in accordance with these methods is of great importance since the fluidity of plastics melts is generally not dependent solely on temperature, but also on other parameters; in particular shear rate and shear stress.<\/p>\n

The methods described in this document are useful for determining melt viscosities from 10 Pa?s to 107<\/sup> Pa?s, depending on the measurement range of the pressure and\/or force transducer and the mechanical and physical characteristics of the rheometer. The shear rates occurring in extrusion rheometers range from 1 s?1<\/sup> to 106<\/sup> s?1<\/sup>.<\/p>\n

Elongational effects at the die entrance cause extrudate swelling at the die exit. Methods for assessing extrudate swelling have also been included.<\/p>\n

The rheological techniques described are not limited to the characterization of wall-adhering thermoplastics melts only; for example, thermoplastics exhibiting \u201cslip\u201d effects[<\/sup> 1<\/sup><\/span>][<\/sup> 2<\/sup><\/span>]<\/sup> and thermosetting plastics can be included. However, the methods used for determining the shear rate and shear viscosity are invalid for materials which are not wall-adhering. Nevertheless, this document can be used to characterize the rheological behaviour of such fluids for a given geometry.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
7<\/td>\nForeword <\/td>\n<\/tr>\n
9<\/td>\n1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
12<\/td>\n4 General principles
5 Apparatus
5.1 Test device
5.1.1 General <\/td>\n<\/tr>\n
13<\/td>\n5.1.2 Rheometer barrel
5.1.3 Capillary dies (method A) <\/td>\n<\/tr>\n
17<\/td>\n5.1.4 Slit dies (method B)
5.1.5 Piston
5.2 Temperature control <\/td>\n<\/tr>\n
18<\/td>\n5.3 Measurement of temperature and calibration
5.3.1 Test temperature
5.3.2 Measurement of test temperature
5.3.3 Temperature calibration
5.4 Measurement of pressure and calibration
5.4.1 Test pressure <\/td>\n<\/tr>\n
19<\/td>\n5.4.2 Pressure drop along the length of the slit die
5.4.3 Calibration
5.5 Measurement of the volume flow rate of the sample
6 Sampling
7 Procedure
7.1 Cleaning the test device <\/td>\n<\/tr>\n
20<\/td>\n7.2 Selection of test temperatures <\/td>\n<\/tr>\n
21<\/td>\n7.3 Preparation of samples
7.4 Preheating
7.5 Determination of the maximum permissible test duration <\/td>\n<\/tr>\n
22<\/td>\n7.6 Determination of test pressure at constant volume flow rate: Method 2
7.7 Determination of volume flow rate at constant test pressure: Method 1
7.8 Waiting periods during measurement
7.9 Measurement of extrudate swelling
7.9.1 General <\/td>\n<\/tr>\n
23<\/td>\n7.9.2 Measurement at room temperature
7.9.3 Measurement at the test temperature
8 Expression of results
8.1 Volume flow rate <\/td>\n<\/tr>\n
24<\/td>\n8.2 Apparent shear rate
8.2.1 General
8.2.2 Method A: Capillary dies
8.2.3 Method B: Slit dies <\/td>\n<\/tr>\n
25<\/td>\n8.3 Apparent shear stress
8.3.1 General
8.3.2 Method A: Capillary dies
8.3.3 Method B: Slit dies
8.4 True shear stress
8.4.1 General <\/td>\n<\/tr>\n
26<\/td>\n8.4.2 Bagley correction for capillary dies (method A) <\/td>\n<\/tr>\n
29<\/td>\n8.4.3 Bagley correction for slit dies (method B) <\/td>\n<\/tr>\n
30<\/td>\n8.4.4 Direct determination using slit dies (method B)
8.5 True shear rate
8.5.1 General <\/td>\n<\/tr>\n
31<\/td>\n8.5.2 Method A: Capillary dies
8.5.3 Method B: Slit dies
8.6 Viscosity
8.7 Determination of extrudate swelling
8.7.1 Measurement at room temperature <\/td>\n<\/tr>\n
32<\/td>\n8.7.2 Measurement at the test temperature
9 Precision <\/td>\n<\/tr>\n
33<\/td>\n10 Test report
10.1 General
10.2 Test conditions <\/td>\n<\/tr>\n
34<\/td>\n10.3 Flow characteristics
10.3.1 General
10.3.2 Graphical representation <\/td>\n<\/tr>\n
35<\/td>\n10.3.3 Individual values
10.4 Visual examination <\/td>\n<\/tr>\n
36<\/td>\nAnnex A (informative) Method of correcting for the influence of H\/B on the apparent shear rate <\/td>\n<\/tr>\n
38<\/td>\nAnnex B (informative) Measurement errors <\/td>\n<\/tr>\n
39<\/td>\nAnnex C (informative) Uncertainties in the determination of shear viscosity by capillary extrusion rheometry testing <\/td>\n<\/tr>\n
44<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Plastics. Determination of the fluidity of plastics using capillary and slit-die rheometers<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2021<\/td>\n46<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":372448,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1177,2641],"product_tag":[],"class_list":{"0":"post-372441","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-83-080-01","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/372441","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/372448"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=372441"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=372441"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=372441"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}