NZ332143A

NZ332143A - Laminated timber product with preservative treatment of inner layer(s) and separate treatment of laminate product using different preservative

Info

Publication number: NZ332143A
Application number: NZ332143A
Authority: NZ
Inventors: Wynton Murray Daniell; Adrian Barry Newton Gray
Original assignee: Fletcher Challenge Forests Ltd
Priority date: 1998-10-02
Filing date: 1998-10-02
Publication date: 2001-06-29
Also published as: JP2000108105A; WO2000020203A1; AU753226B2; AU1083200A

Abstract

Described is a process for preparing laminated timber. The process involves a pre-treatment step where the inner layer or layers of the laminate is/are treated with a first preservative, usually didesyldimethyl ammonium chloride. The product is then laminated by known methods and treated with a second preservative.

Description

New Zealand Paient Spedficaiion for Paient Number 332143 Intellectual Property Office of New Zealand Page 1 of 1 SlfJ IP Summary Report Date: 18 May 2001 Time: 14:45:15 (iprip02 3.00.02) (51) Classification: B32B21/13, E04C2/24 Status: 70 Accepted Client Ref: 23481 MRB/SMR 332143 Version number: 6 IP type: Patent Non-Convention Complete (22) NZ Filing date: 30 September 1999 (71) Applicant: FLETCHER CHALLENGE FORESTS LIMITED, 3 Rockridge Avenue, Penrose, Auckland, New Zealand (72) Inventors: Daniell, Wynton Murray Gray, Adrian Barry Newton Contact: A J PARK, 6th Floor, Huddart Parker Building, 1 Post Office Square, Wellington, New Zealand Journal: 1464 Date actions completed: Application Accepted 18 May 2001 Filed 02 October 1998 Office title: Laminated timber product with preservative treatment of inner layer(s) and separate treatment of laminate product using different preservative (54) Applicant title: Timber lamination (57) Abstract: Patent 332143 Described is a process for preparing laminated timber. The process involves a pre-treatment step where the inner layer or layers of the laminate is/are treated with a first preservative, usually didesyldimethyl ammonium chloride. The product is then laminated by known methods and treated with a second preservative.

* End of report * PATENTS FORM 5 PATENTS ACT 1953 COMPLETE SPECIFICATION Number Dated TIMBER LAMINATION We, FLETCHER CHALLENGE FORESTS LIMITED, a New Zealand company of 3 Rockridge Avenue, Penrose, Auckland, New Zealand, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is "to be performed, to be particularly described in and by the following statement.

Claims

1. CLAIMS: 1. A process of preparing a laminated timber product comprising two outer layers and at least one inner layer, the process comprising the steps of : laminating the outer layers and the at least one inner layer together, wherein the inner layer or layers have been pre-treated with a first timber preservative solution; and treating the resulting laminated product with a second timber preservative solution.

2. A process as claimed in claim 1 wherein the layers are laminated together using an adhesive.

3. A process as claimed in claim 1 or claim 2 wherein the process includes the preliminary step of pre-treating the inner layer (s) with a first timber preservative solution.

4. A process as claimed in claim 3 wherein there are two or more inner layers, each inner layer being treated with a first timber preservative solution which may be the same or different from the preservative solution with which each other inner layer is treated.

5. A process as claimed in any one of claims 1 to 4 wherein the first timber preservative solution (s), with which the inner layer (s) are pre-treated, is or are substantially free of water repellent chemicals.

6. A process as claimed in any one of claims 1 to 5 wherein the second treatment solution, with which the laminated product is treated, contains a water repellent.

7. A process as claimed in any one of claims 1 to 6 wherein the first or second treatment solution also contains one or more insecticides.

8. A process as claimed in claim 7 in which the first or second treatment solution contains a termiticide.

9. A process as claimed in any preceding claim in which the first and second treatment solutions are non-aqueous solutions.

10. A process of preparing a laminated timber product comprising two outer layers and at least one inner layer, which comprises the steps of : treating the inner layer (s) with a first timber preservative solution; laminating the outer layers and the at least one inner layer together; and treating the resulting laminated product with a second timber preservative solution.

11. A process as claimed in any one of claims 1 to 3 and 5 to 10 wherein the laminated timber product has three layers only.

12. A laminated timber product obtainable by a process as claimed in any one of claims 1 to 11.

13. A laminated timber product comprising two outer layers and at least one inner layer, in which all portions of said inner layer (s) are fully treated with a first timber preservative and said outer layers, together with those externally exposed portions of said inner layer (s), are treated with a second, different, timber preservative.

14. A laminated timber product comprising two outer layers and at least one inner layer which is obtainable by a process comprising the steps of laminating the outer layers and the at least one inner layer together, with said inner layer or layer (s) having been pre-treated with a first timber preservative solution, and treating the resulting laminated product with a second timber preservative solution.