Hello, maybe this code helps you, I adapted the response of the following post: Fixed table header for your problem.
The code below shows a table with the fixed header using Material Design Lite, if you need to change the table width just change the width of the outside div.
function scrolify(tblAsJQueryObject, height){
var oTbl = tblAsJQueryObject;
// for very large tables you can remove the four lines below
// and wrap the table with <div> in the mark-up and assign
// height and overflow property
var oTblDiv = $("<div/>");
oTblDiv.css('height', height);
oTblDiv.css('overflow','scroll');
oTbl.wrap(oTblDiv);
// save original width
oTbl.attr("data-item-original-width", oTbl.width());
oTbl.find('thead tr td').each(function(){
$(this).attr("data-item-original-width",$(this).width());
});
oTbl.find('tbody tr:eq(0) td').each(function(){
$(this).attr("data-item-original-width",$(this).width());
});
// clone the original table
var newTbl = oTbl.clone();
// remove table header from original table
oTbl.find('thead tr').remove();
// remove table body from new table
newTbl.find('tbody tr').remove();
oTbl.parent().parent().prepend(newTbl);
newTbl.wrap("<div/>");
// replace ORIGINAL COLUMN width
newTbl.width(newTbl.attr('data-item-original-width'));
newTbl.find('thead tr td').each(function(){
$(this).width($(this).attr("data-item-original-width"));
});
oTbl.width(oTbl.attr('data-item-original-width'));
oTbl.find('tbody tr:eq(0) td').each(function(){
$(this).width($(this).attr("data-item-original-width"));
});
}
$(document).ready(function(){
scrolify($('#tblNeedsScrolling'), 160); // 160 is height
});
<link href="https://code.getmdl.io/1.3.0/material.indigo-pink.min.css" rel="stylesheet"/>
<script src="https://code.getmdl.io/1.3.0/material.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div style="width:80%;border:1px green black;">
<table class="mdl-data-table mdl-js-data-table mdl-shadow--2dp" width="100%" id="tblNeedsScrolling">
<thead>
<tr>
<th class="mdl-data-table__cell--non-numeric" style="width: 55%;">USER</th>
<th>E-MAIL</th>
<th>ACCESS</th>
</tr>
</thead>
<tbody>
<tr>
<td class="mdl-data-table__cell--non-numeric">Acrylic (Transparent)</td>
<td>25</td>
<td>$2.90</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Plywood (Birch)</td>
<td>50</td>
<td>$1.25</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Laminate (Gold on Blue)</td>
<td>10</td>
<td>$2.35</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Laminate (Gold on Blue)</td>
<td>10</td>
<td>$2.35</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Laminate (Gold on Blue)</td>
<td>10</td>
<td>$2.35</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Laminate (Gold on Blue)</td>
<td>10</td>
<td>$2.35</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Laminate (Gold on Blue)</td>
<td>10</td>
<td>$2.35</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Laminate (Gold on Blue)</td>
<td>10</td>
<td>$2.35</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Laminate (Gold on Blue)</td>
<td>10</td>
<td>$2.35</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Laminate (Gold on Blue)</td>
<td>10</td>
<td>$2.35</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Laminate (Gold on Blue)</td>
<td>10</td>
<td>$2.35</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Laminate (Gold on Blue)</td>
<td>10</td>
<td>$2.35</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Laminate (Gold on Blue)</td>
<td>10</td>
<td>$2.35</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Laminate (Gold on Blue)</td>
<td>10</td>
<td>$2.35</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Laminate (Gold on Blue)</td>
<td>10</td>
<td>$2.35</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Laminate (Gold on Blue)</td>
<td>10</td>
<td>$2.35</td>
</tr>
<tr>
<td class="mdl-data-table__cell--non-numeric">Laminate (Gold on Blue)</td>
<td>10</td>
<td>$2.35</td>
</tr>
</tbody>
</table>
</div>