<p class="MsoBodyText"><span lang="EN-GB">This document specifies two methods for determining the air flow value of flexible cellular polymeric materials:</span></p>
<p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';"> </span></span></span><!--[endif]--><span lang="EN-GB">method A, for conventional types of flexible cellular polymeric material;</span></p>
<p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';"> </span></span></span><!--[endif]--><span lang="EN-GB">method B, for all types of flexible cellular polymeric material, but especially for materials with a low permeability to air.</span></p>
<p class="MsoBodyText"><span lang="EN-GB">For method B, two methods are specified in this document:</span></p>
<p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';"> </span></span></span><!--[endif]--><span lang="EN-GB">method B1: with manual measurement;</span></p>
<p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';"> </span></span></span><!--[endif]--><span lang="EN-GB">method B2: with automatic measurement.</span></p>
<p class="Note"><span lang="EN-GB">NOTE 1<span style="mso-tab-count: 1;"> </span>Air flow values can be used to give an indication of the effects of formulation and production variables on the cellular structure.</span></p>
<p class="Note"><span lang="EN-GB">NOTE 2<span style="mso-tab-count: 1;"> </span>In this document, the expression “conventional type of flexible cellular polymeric material” means types which are unsuitable for sealing purposes.</span></p>
Registration number (WIID)
82601
Scope
<p class="MsoBodyText"><span lang="EN-GB">This document specifies two methods for determining the air flow value of flexible cellular polymeric materials:</span></p>
<p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';"> </span></span></span><!--[endif]--><span lang="EN-GB">method A, for conventional types of flexible cellular polymeric material;</span></p>
<p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';"> </span></span></span><!--[endif]--><span lang="EN-GB">method B, for all types of flexible cellular polymeric material, but especially for materials with a low permeability to air.</span></p>
<p class="MsoBodyText"><span lang="EN-GB">For method B, two methods are specified in this document:</span></p>
<p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';"> </span></span></span><!--[endif]--><span lang="EN-GB">method B1: with manual measurement;</span></p>
<p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';"> </span></span></span><!--[endif]--><span lang="EN-GB">method B2: with automatic measurement.</span></p>
<p class="Note"><span lang="EN-GB">NOTE 1<span style="mso-tab-count: 1;"> </span>Air flow values can be used to give an indication of the effects of formulation and production variables on the cellular structure.</span></p>
<p class="Note"><span lang="EN-GB">NOTE 2<span style="mso-tab-count: 1;"> </span>In this document, the expression “conventional type of flexible cellular polymeric material” means types which are unsuitable for sealing purposes.</span></p>
