Supercharge Your Innovation With Domain-Expert AI Agents!

High-air-permeability paper pulp and preparation method and application thereof

An air permeability and pulp technology, applied in papermaking, textile and papermaking, cellulose raw material pulping, etc., can solve the problems of air permeability fiber shape broken, poor air permeability, low air permeability, etc., and achieve good water absorption and air permeability. The effect of improved performance, reduced packing pressure and tightness

Inactive Publication Date: 2011-07-13
张金
View PDF4 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the pulp fiber formed in this form has the following disadvantages: low air permeability, tight structure, and poor bulk
The air permeability of this kind of pulp is poor because of its broken and straight fiber shape.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-air-permeability paper pulp and preparation method and application thereof
  • High-air-permeability paper pulp and preparation method and application thereof
  • High-air-permeability paper pulp and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Ordinary pulp raw materials: flat or roll-shaped bleached softwood pulp board (moisture ≤ 20%).

[0052] 1. Decompose the raw material dry pulp board with clear water first, the pulp concentration is 4.0wt%, the water temperature is 35°C, and the decompression time is 0.5 hours; a hydraulic pulper (2JGS energy-saving hydraulic pulper, Zhucheng Jinlong Machinery Manufacturing Co., Ltd.) is pulped deal with.

[0053] 2, the slurry that step 1 obtains utilizes rotor sieve (model XY-1-3, Zhucheng Wanfang Machinery Co., Ltd.) to sieve the fibers, and the broken small fibers with fiber length≤0.8mm are screened out, and the Slurry concentration 0.08-0.50%, normal temperature, normal pressure.

[0054] 3. Dry the slurry obtained in step 2 with air flow, the moisture content of the slurry before drying is 50%, and the slurry before drying is preheated to a temperature of 50°C; then it is sent to the airflow dryer, and the air pressure of the airflow fan is 4.0-5.0 kg / cm 2 , ...

Embodiment 2

[0059] Ordinary pulp raw material: loose (moisture 20-40%) bleached softwood pulp.

[0060] 1. Dilute the loose pulp raw material with clean water to a pulp concentration of 3.8wt%, and the water temperature is 30-35°C, and then deflagged by a deflagging machine for 30 minutes.

[0061] 2. Sieve the slurry obtained in step 1, and screen out the broken small fibers with a fiber length≤0.8mm, the screening concentration is 0.15wt%, and other conditions are the same as in Example 1.

[0062] 3. Dry the slurry obtained in step 2 with air flow, the moisture content of the slurry before drying is 55%, and the slurry before drying is preheated to a temperature of 60°C; then it is sent into an airflow dryer, and the air pressure of the fan is 4.5kg / cm2 , dried by hot air flow to 90% pulp dryness.

[0063] 4. Cool the dry hot slurry obtained in step 3, and control the temperature of the air of the cooling fan at 30-32°C.

[0064] 5. Pack the dried pulp obtained in step 4. The tempera...

Embodiment 3

[0066] Embodiment 3: Ordinary pulp raw material: wet bleached softwood pulp (moisture greater than 60%).

[0067] 1. Dilute the wet slurry raw material directly with water in the slurry tank to a slurry concentration of 3.5wt%, and the water temperature is 25-30°C

[0068] 2, the slurry that step 1 obtains is screened, with embodiment 1.

[0069] 3, the slurry that step 2 obtains is carried out air flow drying, with embodiment 1.

[0070] 4. Cool the slurry obtained in step 3, and control the temperature of the cooling fan at 20-25°C.

[0071] 5. Pack the dried pulp obtained in step 4. The temperature of the pulp before packing is 20-25°C, the packing pressure is 50-90MPa, and the pulp tightness is 0.5g / cm 3 .

[0072] The micrograph of the obtained product pulp is as Image 6 shown.

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
Login to View More

PUM

PropertyMeasurementUnit
Lengthaaaaaaaaaa
Tightnessaaaaaaaaaa
Login to View More

Abstract

The invention relates to high-air-permeability paper pulp and a preparation method and application thereof. The method comprises the following steps of: separating small fibers with the lengths less than or equal to 0.8 millimeter out of pretreated ordinary paper pulp serving as a raw material by screening, and concentrating; performing flash drying at the temperature between 110 DEG C and 280 DEG C, wherein the water content of concentrated pulp is between 40 percent by weight and 70 percent by weight; and cooling dry pulp to 10-50 DEG C, packaging under the pressure between 30 MPa and 150 MPa and molding, wherein the tightness of paper pulp is between 0.4 g / cm<3> and 1.0 g / cm<3>. The obtained paper pulp finished paper has high air permeability, high hydroscopic property, large loose depth, high fiber intensity and high whiteness degree, and is used for preparing a filtering material.

Description

technical field [0001] The invention relates to pulp with high air permeability and a preparation method thereof, belonging to the technical field of special pulp. Background technique [0002] With the application and expansion of pulp in different fields and products, the research, development and application of special pulp are becoming more and more important. [0003] At present, ordinary pulp products in the world often have the following types: [0004] 1. Plate pulp in flat or reel. The vast majority of pulp products are plate-shaped pulp boards, and those with a moisture content of ≤20% are generally called pulp boards in the industry, that is, board-shaped pulp. It is made of paper pulp by forming machine to form a plate shape, and then dried. The former is divided into cylinder net and fourdrinier net. Since the forming process relies on the pressure difference at a certain concentration to make the pulp rush forward along the forming wire at a certain speed o...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D21H15/00D21C3/22
Inventor 张金秦大伟朱春燕董慧婷田振
Owner 张金
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com