A method for producing leather release type base paper
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A production method and release technology, applied in papermaking, paper coating, papermaking and other directions, can solve the problems of high cost, dependence on imports of leather release paper, and restricting the rapid development of artificial leather.
Inactive Publication Date: 2017-11-17
ZHENJIANG DADONG PULP & PAPER
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[0002] With the development of the economy, my country's synthetic leather industry is developing rapidly. As an important carrier of synthetic leather, the demand for leather release paper is also increasing. But so far, the required leather release paper is still heavily dependent on Imports, untimely supply, high cost, etc. seriously restrict the rapid development of the domestic artificial leather industry
[0003] Leather release paper is composed of base paper and coated release layer. Base paper is also very demanding as its basic part. At present, there are relatively few researches on base paper in China, and there is no mature process for producing high-quality leather release paper base paper.
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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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Embodiment 1
[0018] Example 1: 147g / m 2 Leather release base paper, making speed 160m / min
[0019] The production method of the leather release base paper is produced by an ordinary fourdrinier multi-cylinder paper machine. The production process is beating, pulping, sizing, papermaking, drying, surface sizing, calendering and rewinding to make finished paper. Leather release base paper uses bleached kraft needles and hardwood pulp as the main raw materials, chemical additives fillers (ZnO and calcium carbonate), dry strength agent, wet strength agent, retention agent and AKD (alkyl ketene dimer) as auxiliary raw materials. The specific process is as follows:
[0020] (1) Sizing ratio and beating: bleached kraft softwood pulp is equipped with 20%, bleached kraft hardwood pulp 80%; softwood pulp beating concentration 3.1%, freeness 360ml; hardwood pulp beating concentration 4.6%, Freeness 440ml
[0021] (2) Auxiliary raw materials:
[0022] The dosage of filler ZnO is 2.1% / dry pulp; th...
Embodiment 2
[0030] Example 2: 147g / m 2 Leather release base paper, machine speed 180m / min
[0031] The production method of the leather release base paper is produced by an ordinary fourdrinier multi-cylinder paper machine. The production process is beating, pulping, sizing, papermaking, drying, surface sizing, calendering and rewinding to make finished paper. Leather release base paper uses bleached kraft needles and hardwood pulp as the main raw materials, chemical additives fillers (ZnO and calcium carbonate), dry strength agent, wet strength agent, retention agent and AKD (alkyl ketene dimer) as auxiliary raw materials. The specific process is as follows:
[0032] (1) Sizing ratio and beating: bleached kraft softwood pulp is equipped with 30%, bleached kraft hardwood pulp 70%; softwood pulp beating concentration 3.8%, freeness 380ml; hardwood pulp beating concentration 4.9%, Freeness 470ml
[0033] (2) Auxiliary raw materials:
[0034] The dosage of filler ZnO is 2.8% / dry pulp; t...
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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Abstract
The invention belongs to papermaking techniques and relates to a method for producing leather release type base paper. According to the method, base raw materials which are bleached sulfate softwood pulp and bleached sulfate hardwood pulp are subjected to steps of pulping, pulp preparing, sizing, papermaking with pulp, drying for the first time, surface sizing, after-drying, calendaring, and taking up in order to obtain finished-product paper; auxiliary raw materials are added in process steps; according to a material transferring sequence, materials in the pulping step pass through a pulper, a before-beating pulp pool, a pulp grinding machine and an after-beating pulp pool in order; materials in the pulp preparing step pass through a pulp preparing pool, a transit pulp pool, a paper machine pulp pool and a high-attitude tank in order; materials in the sizing step pass through a first pulp washing pump, a slag separator, a second pulp washing pump and a pressure sieve in order; materials in the papermaking step pass through a head box, a screen part and a squeezing part in order. The base paper produced by the method has good uniformity, fine and smooth paper surfaces, high strength, proper anti-permeation performance and good heat resistance and can adapt to requirements if subsequent leather production processes.
Description
technical field [0001] The invention belongs to papermaking technology and relates to a production method of leather release base paper. Background technique [0002] With the development of the economy, my country's synthetic leather industry is developing rapidly. As an important carrier of synthetic leather, the demand for leather release paper is also increasing. But so far, the required leather release paper is still heavily dependent on Imports, untimely supply, high cost, etc. seriously restrict the rapid development of the domestic artificial leather industry. [0003] Leather release paper is composed of base paper and coated release layer. Base paper is also very demanding as its basic part. At present, there are relatively few researches on base paper in China, and there is no mature technology that can produce high-quality leather release paper base paper. Contents of the invention [0004] The technical problem to be solved by the present invention is to provi...
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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