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A production method, straw paper technology, which is applied in the field of papermaking, can solve problems such as difficult to balance the weeding performance and cost requirements of rice, and achieve the effects of reducing photosynthesis, good shading, and low air permeability
Active Publication Date: 2018-12-11
ZHENJIANG DADONG PULP & PAPER
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Problems solved by technology
However, paper made by traditional methods is difficult to balance the performance and cost requirements of rice weeding
Method used
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Embodiment 1
[0011] Example 1: 35g / m 2 Rice weeding paper, making speed 130m / min
[0012] Rice weeding paper is produced by ordinary rotary paper machine, with unbleached kraft softwood pulp and unbleached kraft hardwood pulp as main raw materials, carbon black, rosin gum, aluminum sulfate, wet strength agent polyamide polyamine ring Oxychlorohydrin and retention agent polyacrylamide are auxiliary raw materials, and the wet strength agent is added in two steps. The specific process is as follows:
[0013] (1) Ratio of main raw materials and beating: 25% unbleached kraft softwood pulp and 75% unbleached kraft broadleaf pulp; the beating concentration of mixed pulp is 4.2%, and the beating freeness is 210ml.
[0014] (2) Auxiliary raw materials:
[0015] The amount of carbon black is 0.8% / dry pulp; the amount of rosin gum is 0.8% / dry pulp, the amount of aluminum sulfate is 0.9% / dry pulp; the amount of retaining agent is 140ppm / dry pulp.
[0016] The dosage of wet strength agent is 0.8% / d...
Embodiment 2
[0022] Example 2: 35g / m 2 Rice weeding paper, making speed 140m / min
[0023] Rice weeding paper is produced by ordinary rotary paper machine, with unbleached kraft softwood pulp and unbleached kraft hardwood pulp as main raw materials, carbon black, rosin gum, aluminum sulfate, wet strength agent polyamide polyamine ring Oxychlorohydrin and retention agent polyacrylamide are auxiliary raw materials, and the wet strength agent is added in two steps. The specific process is as follows:
[0024] (1) Ratio of main raw materials and beating: 30% unbleached kraft softwood pulp, 70% unbleached kraft broadleaf wood pulp; the beating concentration of mixed pulp is 4.4%, and the beating freeness is 230ml.
[0025] (2) Auxiliary raw materials:
[0026] The amount of carbon black is 0.7% / dry pulp; the amount of rosin gum is 0.9% / dry pulp, the amount of aluminum sulfate is 0.8% / dry pulp; the amount of retaining agent is 160ppm / dry pulp.
[0027] The dosage of wet strength agent is 0.9%...
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Abstract
The invention relates to a production method of rice weeding paper. The rice weeding paper is produced by the aid of a common cylinder paper-making machine, main pulp materials of the rice weeding paper include unbleached sulfate softwood pulp and unbleached sulfate hardwood pulp, and auxiliary raw materials of the rice weeding paper include carbon black, rosin size, aluminum sulfate, polyamide polyamine epichlorohydrin serving as wet strength agents and polyacrylamide serving as retention agents. A papermaking process includes that the main pulp materials are sequentially subjected to repulping, defibrination, proportioning, sizing, cylinder papermaking, pressing, vat drying, surface gluing, after-drying and winding to form finished paper. The rice weeding paper has the advantages that the rice weeding paper is light in weight, low in cost and air permeability, high in opaqueness, green and environmentally friendly, the longitudinal strength of the paper is high by the aid of the cylinder papermaking process, field covering requirements can be effectively met, excellent sunshine shading and air isolation performances are achieved, growth of field weeds is prevented or reduced, pollution is avoided, the rice weeding paper can serve as fertilizer to be used, and pollution-free agricultural production is achieved.
Description
technical field [0001] The invention belongs to papermaking technology, and relates to a production method of rice weeding paper. Background technique [0002] With the development of the economy, labor costs and environmental protection requirements are getting higher and higher. Rice weeding paper has been successfully developed as an innovative and environmentally friendly product. It can cover rice without artificial weeding and without using any pesticides while ensuring the normal growth of rice. The growth of weeds in the paddy field can be suppressed in the paddy field, so as to achieve the goal of low-cost, green and environmental protection, and pollution-free agricultural production. However, paper made by traditional methods is difficult to balance the performance and cost requirements of rice weeding. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a production of rice weeding paper suitable for gre...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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