Method for producing wrapping paper by oil palm empty fruit bunches mechanical pulping

Abstract

The invention provides a method for producing wrapping paper by pulping of hollow nuts of oil palms with a mechanical process, which comprises that: step one, raw materials are washed by water to remove residual oil, sand grains and dust; step two, a penetrant is added for prepenetration treatment; step three, the raw materials are extruded for dehydration and pressed into filaments, and the filaments are sent into a first pass of thermofiner for coarse grinding and separated into unscreened pulp; step four, the unscreened pulp is added with water for dilution, and respectively screened into the unscreened pulp and screened pulp which are then respectively extruded and filtered; step five, the unscreened pulp enters a second pass of thermofiner for hot grinding after being condensed, and the ground pulp and the screened pulp from a pulp cleaner of the step four are mixed together; step six, the ground pulp is mixed evenly and undergoes pulp screening after pulp dilution, the unscreened pulp enters the second pass of pulping machine for pulping again, and the screened pulp is condensed and ready for a third pass of fine pulping; step seven, the mixed pulp is further ground finely; and step eight, the pulp is put onto a net by a paper machine for paper making to produce carton boards or high strength corrugating paper. The method is characterized by high yield, low cost and small pollution.

Description

technical field [0001] The invention belongs to the technical field of packaging paper production, and in particular relates to a method for producing packaging paper by mechanical pulping of oil palm empty fruit. Background technique [0002] Oil palm fiber mainly comes from the trunk, leaf sheath, empty fruit channel and hollow bark raw materials. The cellulose content in the oil palm fiber raw material is as high as 85%, the lignin content is about 18%, and the ash content is low. High-quality raw materials for papermaking are mostly produced in Southeast Asia. The 2008 Malaysian palm tree harvest was bumper. With good weather and high production, Malaysia's palm oil output may reach a record 17.5 million tons this year, higher than the previous year's 15.8 million tons. According to statistics, there are more than 12 million tons of empty fruit fiber raw materials in Malaysia every year. Except for a small amount of fiberboard production or handicrafts, most of them ar...

AI Technical Summary

Problems solved by technology

[0005] 1. The pollution of pulping is serious, and the investment and cost to solve the pollution are large;

[0006] 2. The production process is complicated, the construction investment is large, and the production cycle is long;

[0007] 3. The paper yield is low, and the pulping yield is generally 45%-50%;

[0008] 4. High production cost