1117
Accession Number
19411
Author
Hawker, Juliet J.
Editor
Grimstad, Kirsten
Author Affiliation
Courtauld Institute of Art. London. England
Title Of Article Chaper
The bond strengths of two hot table lining adhesives - Beva 371 and Plextol D360
Title Of Journal Book
ICOM committee for conservation: 8th triennial meeting, Sydney, Australia, 6-11 September, 1987. Preprints
Volume
1
Pages
161-168
Collation
10 figs., 9 refs.
Publisher
Getty Conservation Institute
Publisher City
Marina del Rey
ISBN
0-89236-094-1
Language Of Text
English
Literature Type
Monograph
Literature Level
Analytic
Meeting
ICOM committee for conservation: 8th triennial meeting
Meeting City
Sydney
Meeting Country
Australia
Abstract
This paper attempts to give a guide as to the likely bond strengths achieved when these adhesives are applied at particular thicknesses, and bonded at particular temperatures on a Willard hot table. In all hot table experiments a fine weight pre-primed linen canvas is bonded to Polyester sailcloth under a pressure of 38 centimeters H<sub>2</sub>O. Some sizing of the lining fabric was done using B72, and some initial tests with solvent activation were carried out. Beva 371 gel was capable of forming very strong bonds, but a thickness or coat weight of 80g/m<sup>2</sup> dry adhesive bonded at 55°c gave a good strength of 900g/2.5 centimeters on the Courtauld hot table. Beva 371 gel on sized cloth gave similarly good bonds, but these bonds were more prone to adhesive transfer. Beva 371 film gave extremely high bonds of over 5,000g/2.5 centimeters if used in multiple layers. One layer needed a temperature of at least 62°c to form a bond of around 700g/2.5 centimeters - again on the Courtauld hot table. Plextol D360 gave very adequate initial bonds, and the bonding temperature and thickness could be balanced against each other to obtain a required initial strength. With a coat weight of 370g/m<sup>2</sup> at a bonding temperature of 35°c, 550g/2.5 centimeters was achievable, when tensile tested at four weeks. A lighter coat of 100g/m<sup>2</sup> bonded at 55°c gave a similar bond strength result. Both Beva 371 and Plextol D360 could be successfully solvent activated by brushing on the solvent; some heat was required with Beva. -- AATA
pub_id
1117
Meeting Date
19870906-19870911