| 摘要 |
Constructional material comprises a sheet of thermoplastic material having a friction surface on at least one face for receiving and retaining the mortar and/or other constructional material. The thermoplastic material is pref. polyethylene, polypropylene or PVC. The friction surface may consist of ribs and/or grooves in the sheet. The friction surface prevents the mortar or similar material from becoming displaced during the use of the constructional material. |
