The question is not new. Nowadays we use synthetic resins and polymers. Natural adhesives are generally dispersed in water prior to application and cure primarily by solvent removal, although some are formulated with the addition of cross-linking agents.

%�U��⪋ܭ��Չ+ܽ0�o��.�κ�km=�4evZ�yTM�_./{�J��Q��#�U0���Cf/�4������᧋GU����bP6�4� �8]��Y���̑F�ˏ;�e��/�3��ySVp�eݟ�w�e���BBriU7�3[�6�^��9���1�׍O�gD�y�y:nf�%��՟��fO��$�K&�~'�?m!7����1�^����]U�bLDs���4�V���2�-���3W ������3����A�fV9|�墂Iz�N�P�[�n��2+�Ӡ�����M����=��>�!� �� ����[x�fp endstream endobj 122 0 obj <> endobj 123 0 obj <>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/Type/Page>> endobj 124 0 obj <>stream - The 5 Factors of Adhesion The Big 3: Components, Formats, and Adhesives adhesives, even underwater, can have bulk cohesive strength much greater than natural underwater adhesives, but even-tually fail due to poor interfacial adhesion in the presence of water.9–11 Most proteins adhere strongly to wet interfaces, but generally in monolayers,12 and are poor glues13 when wet. endstream endobj startxref In reality a great deal of technology backs the apparently simple action of bonding. The ancient Egyptians attached veneers to furniture with glue.

The association’s mission is to promote the use of natural stone and be the authoritative source of information on standards of workmanship and practice and suitable application of … 131 0 obj <>/Filter/FlateDecode/ID[]/Index[121 24]/Info 120 0 R/Length 71/Prev 723071/Root 122 0 R/Size 145/Type/XRef/W[1 3 1]>>stream When we bond components together, the adhesive first thoroughly wets the surface and fills the gap between. Bonding different materials together by means of an adhesive may appear to most people as a mundane occurrence. U35�B@a��(�$ц�&��yE9��A*��F��\S\�}D�X�x�TW��@��Ж�p����� ��?>_��Ba%�yz����!6�b��a���>O���oǯ.p׾u7���M� �Jx} h�b```f``2� � cB� :�^i��}�t��Qb�:��%�z�V߬O�.�-~d��OVF�|^x:v��M�Ɏ&�@�8�C�q�����dG��0q4p4t�v0t4pt �`F�E� D�m �*���x�� b.�3������$�WR����n�J��`?�1�X���r �d�q�

natural origin, and those adhesives which are based on synthetic resins derived from petroleum, natural gas, and coal, i.e., products of the petrochemical and related industries. %%EOF 144 0 obj <>stream

0 h��W[O;�+~?�f}][�*.�琶"�Ѓx0'��^�� ��{7$Zڣ*23��=����@9#��&Q� T#�R�(ʘ���Ē�4�*p*3�2�+�0�q��+jJ^��w�������۸ׯ��4��=� �W�������ڷ�;,�r�S���mq?p�N&�rE��KΠ���%a������`�����R �3r W�F* Thus, a complex and advanced technology, or series of technologies, has arisen to deal with adhesives and their applications in many fields. endstream endobj 125 0 obj <>stream

�>,"1��Fsјe�S�3�LȂO"s�Su��O �]�����7i���i7���*Ɗr�~��[S�V%(��I�:*��"ia�v�r��!��3m��hF���6��᠂�x���9&l�*�A;j+�} �E�c����r��͖�q�"vQ��mP^[2�*�]�. The early wood composite products industry was founded on the use of this type of adhesive for plywood production. (a�/A@����X�|%���e��fw`Mi�5߻G�:�1�h�6�F�A�a��p� 6� �������C�Q��N�)���#�����l���3`���c�YxƺmAG;�T?�x�:�� These early glues were all natural substances. H��UۊA��z�(LoW����+ h�bbd```b``z"C���d�"�S@���' I�Cw����L@8@�@}��S� �� The properties of various adhesives are d iscussed below separated according to these two categ ories.Natural Adhesives

Table of Contents 3 6 15 20 25 27 32 Pressure Sensitive Tape Basics T.A.P.E.S. stone, and other natural stone producers and quarriers, fabricators, installers, distributors, and contractors. #8��Ή6���,\C���-��n � 121 0 obj <> endobj �[P*�nR��U���$jZox�̂m�Aݴs�G���__�Vg*x�V�l�}�,x��@��.د�ԟ������-���-@��ᱧ��5q��:��������A`p����6�>?�]�]/���_�k~�n�E\1��sy�G��綷���b������jπ=α\��ˆ3�i0ަ���y���ey��*�1������?G���`�t_���‚W�5�o~�PU(�,\#6Hw1��F�� %PDF-1.7 %����

Man has used adhesives or glues since the dawn of history.