Preparation method of regenerated aramid composite paper

A composite paper and aramid fiber technology, which is applied in the direction of synthetic cellulose/non-cellulose material pulp/paper, papermaking, paper, etc., can solve the problems of poor physical properties and low insulation performance of aramid paper, and achieve compact and dense paper structure , Excellent product performance, cost can be industrialized

Active Publication Date: 2019-03-12
SOUTH CHINA UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to overcome the problems of poor physical properties and low insulating properties of aramid paper in the prior art, and provide a method for preparing high-performance aramid composite paper with good physical properties and good insulating properties. Has a good industrial-scale production base

Method used

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  • Preparation method of regenerated aramid composite paper
  • Preparation method of regenerated aramid composite paper
  • Preparation method of regenerated aramid composite paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A preparation method of recycled aramid composite paper, comprising the steps of:

[0045] (1) Preparation of the pretreatment solution: dissolving sodium dodecylbenzenecyclonate in water and diluting it into a solution with a mass fraction of 5% to obtain the pretreatment solution for subsequent use;

[0046] (2) Fiber pretreatment: maintain the pretreatment solution prepared in step (1) at a temperature of 50-60°C to pretreat the para-aramid chopped fibers. The pretreatment process is to use just enough to cover the fiber Sodium dodecylbenzene sulfonate solution was used to treat the fibers for 40 minutes. During the treatment, ultrasonic waves were used for synergistic treatment. The ultrasonic power was 50w and stirred once every 10 minutes. After the treatment, the aramid chopped fibers were washed and dried to obtain pretreatment. After the aramid chopped fiber;

[0047] (3) Fiber surface modification: the pretreated para-aramid chopped fibers obtained in step (2...

Embodiment 2

[0056] A preparation method of recycled aramid composite paper, comprising the steps of:

[0057] (1) the equipment of pretreatment liquid: acetone is dissolved in water and is diluted into the solution that mass fraction is 40%, obtains pretreatment liquid, for subsequent use;

[0058] (2) Fiber pretreatment: maintain the pretreatment solution prepared in step (1) at a temperature of 40°C to pretreat the para-aramid chopped fibers. The pretreatment process is to use acetone just enough to cover the fiber The fiber is treated with the solution for 50 minutes, and it needs to be co-processed with ultrasonic waves. The ultrasonic power is 50w, and it needs to be stirred once every 10 minutes. After the treatment, the aramid chopped fibers are washed and dried to obtain the pretreated aramid chopped fibers. ;

[0059] (3) Fiber surface modification: the pretreated aramid chopped fibers obtained in step (2), and untreated para-aramid pulp fibers and meta-aramid pulp fibers are us...

Embodiment 3

[0067] A preparation method of recycled aramid composite paper, comprising the steps of:

[0068] (1) Preparation of pretreatment solution: dissolving fatty acid glyceride in water and diluting it into a solution with a mass fraction of 3% to obtain pretreatment solution for subsequent use;

[0069](2) Fiber pretreatment: maintain the pretreatment solution prepared in step (1) at a temperature of about 45°C, and pretreat the para-aramid chopped fibers. The pretreatment process is to use just enough to cover the fiber Fatty acid glyceride solution treats the fiber for 60 minutes. During the treatment, it needs to be treated with ultrasonic wave. The ultrasonic power is 50w, and it needs to be stirred once every 15 minutes. After the treatment, the aramid fiber is washed and dried to obtain the pretreated aramid fiber. chopped fibers;

[0070] (3) Fiber surface modification: the pretreated aramid chopped fiber obtained in step (2) and the untreated meta-aramid pulp fiber are mo...

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Abstract

The invention discloses a preparation method of regenerated aramid composite paper. The preparation method includes: pretreating para-aramid chopped fiber, para-aramid pulp fiber and meta-aramid pulpfiber, mixing, loosening to form a uniform fiber/aqueous suspension, adding a papermaking aid into the suspension, dewatering, and molding to obtain composite aramid raw paper; dissolving the meta-aramid fiber by using organic solvent/inorganic salt solution to obtain an aramid solution, dropwise adding the prepared aramid solution into the structure of the aramid composite raw paper, putting thearamid composite raw paper into the air for regeneration, after the regeneration is completed, hot pressing the paper a high temperature and high pressure, and cleaning residual organic solvent and inorganic salt by using water to obtain high-strength aramid composite paper. The quantity of the high-strength aramid composite paper is 20 to 200 g/m2, the thickness is 10 to 300 micrometers, the mechanical strength is greatly improved, and the tensile strength is improved by 20 times.

Description

technical field [0001] The present invention relates to a manufacturing method of high-strength aramid fiber paper, more specifically, it relates to a new method of using meta-aramid fiber solution to strengthen ordinary aramid fiber composite paper so as to greatly improve its mechanical properties. Aramid composite paper can be used in military, circuit board substrate, transportation, construction, packaging, electrical and other fields. Background technique [0002] Aramid fiber has the advantages of good insulation performance, high temperature resistance, good flame retardancy, strong corrosion resistance and good mechanical properties. In recent years, as a new type of high-performance special material, aramid paper has gradually expanded its important applications in the fields of insulation materials, construction industry, transportation, and military industry substrates. [0003] At present, my country's aramid paper industry has achieved relatively rapid develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/26D21H15/10D21F11/00D21H17/55D21H17/66D21H25/06D21B1/02
CPCD21B1/023D21F11/00D21H13/26D21H15/10D21H17/55D21H17/66D21H25/06
Inventor 刘德桃欧阳豪王新筑林美燕苏灵峰李映辉徐科
Owner SOUTH CHINA UNIV OF TECH
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