Non-heat-sealing tea filter paper with double-layer structure, production method of non-heat-sealing tea filter paper and tea bag

The invention belongs to the technical field of new special paper materials, and particularly relates to non-heat-sealing tea filter paper of a double-layer structure, a production method of the non-heat-sealing tea filter paper and a tea bag. Non-heat-sealing tea leaf filter paper of a double-layer structure is composed of a papermaking layer A and a papermaking layer B, the papermaking layer close to the net surface is the layer A, papermaking pulp selected by the layer A is wood pulp with the fiber broadband larger than or equal to 28 micrometers, and papermaking pulp selected by the layer B is plant fiber pulp with the fiber broadband smaller than or equal to 23 micrometers; the proportion of the layer A in the paper fiber mass is 50-75%, and the proportion of the layer B in the paper fiber mass is 25-50%. The aperture of the tea filter paper is small, the center joint of a tea bag is well combined, tea dust is not easy to leak, and the tea filter paper is smoothly used on a non-heat-sealing tea filter pa