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A production process of sulfur-free circuit board release paper

A production process and technology for separating paper, applied in the field of papermaking, can solve problems such as inability to meet requirements, and achieve the effects of improving refining effect, improving bonding strength, and ensuring uniformity

Active Publication Date: 2021-07-30
宁波思特雷斯金属防护材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If papermaking is carried out through ordinary papermaking procedures (pulping, filtering, refining, forming, sizing, drying), a certain amount of water-soluble chlorides and water-soluble sulfates will adhere to the fibers, which cannot meet the requirements.

Method used

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  • A production process of sulfur-free circuit board release paper
  • A production process of sulfur-free circuit board release paper
  • A production process of sulfur-free circuit board release paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0041] Embodiment 1-3: A production process of a sulfur-free circuit board release paper, including the following steps, and see Table 1 for specific parameters: S1: Pulp preparation: raw materials are bleached kraft softwood pulp and bleached kraft wood pulp with a total amount of 1 ton. Composed of kraft hardwood pulp, the raw materials are mixed and pulped with water for 8-10 minutes to obtain a slurry with a concentration of 4.5-5.0%;

[0042] S2: primary dilution: transfer the slurry obtained in step S1 to the 1# mixing tank, and add water to dilute to 3.0-3.5%;

[0043] S3: concentration: the slurry obtained in step S2 is concentrated to a concentration of 25-30% through a twin wire press;

[0044] S4: secondary dilution: the slurry obtained in step S3 is diluted to 4.5-5.0% by adding water while stirring in the 2# mixing tank;

[0045] S5: Refining: transfer the slurry obtained in step S4 to the pulp tank before knocking, and send it to refining, refining requirements:...

Embodiment 4

[0060] Example 4: A production process for a sulfur-free circuit board release paper, the difference from Example 1 is that the water in steps S1-S4 is treated with a reverse osmosis membrane before being used.

Embodiment 5

[0061] Example 5: A production process of sulfur-free circuit board release paper, the difference from Example 4 is that in step S5, the number of disk mills is 3 sets used in series, and the tooth type is 26TA105 / 106 of the brand of ANDRITZ , 26TA103 / 104, 26TA203 / 204.

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Abstract

The invention discloses a production process of a sulfur-free circuit board release paper. The production process includes the following steps: S1: Pulping: the raw materials are bleached kraft softwood pulp and bleached kraft hardwood pulp, the raw materials are mixed and pulped with water for 8-10 minutes to obtain a slurry with a concentration of 4.5-5.0%; S2: Primary dilution: transfer the slurry obtained in step S1 to the 1# mixed slurry tank, add water to dilute to 3.0-3.5%; S3: concentrate: concentrate the slurry liquid obtained in step S2 to a concentration of 25-30%; S4: secondary Dilution: Dilute the slurry obtained in step S3 with water to 4.5-5.0% in the 2# mixed slurry tank; S5: Refining: transfer the slurry obtained in step S4 to the pulp tank before knocking, and send it to refining; S6: Forming ; S7: Surface sizing; S8: Calendered coiling. The invention has the advantages of reducing the content of water-soluble chloride and water-soluble sulfate in raw materials, and simultaneously has the advantages of good uniformity and surface strength.

Description

technical field [0001] The invention relates to the technical field of papermaking, more specifically, it relates to a production process of a sulfur-free circuit board release paper. Background technique [0002] The electronic circuit board is composed of an insulating base plate, connecting wires and pads for assembling and welding electronic components, and has the dual functions of a conductive line and an insulating base plate. Small in size and low in cost, it has been widely used in the production and manufacture of electronic products. [0003] Sulfur-free circuit board release paper is a special paper used to isolate electronic circuit boards. Its main function is to protect the surface of electronic circuit boards from scratches during production and transportation. It cannot be oxidized with the electronic circuit, causing problems such as corrosion of the electronic circuit. Therefore, the release paper is required to achieve uniform fiber structure, neutral p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/00D21H11/04D21D1/30D21F11/00D21H23/22D21H21/16
CPCD21D1/30D21F11/00D21H11/04D21H21/16D21H23/22D21H27/00
Inventor 沃海波周洪刚朱有盛韩松
Owner 宁波思特雷斯金属防护材料有限公司