A kind of manufacturing method of waterproof and antifreeze kraft paper

A manufacturing method and technology of kraft paper, applied in the field of papermaking, can solve the problems of difficulty in meeting the packaging requirements of fresh cold chain food, lack of waterproof and antifreeze, damage, etc., and achieve the effects of improving enterprise competitiveness, excellent burst resistance, and improving strength

Active Publication Date: 2020-09-11
YUEYANG FOREST & PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, because ordinary kraft paper does not have the function of waterproof and antifreeze, it is difficult to meet the packaging requirements of fresh cold chain food. Independently developed and developed waterproof and antifreeze kraft paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: 115 grams of waterproof and antifreeze kraft paper

[0024] The 100% coniferous wood kraft natural color pulp is beaten through three conical mills in series, the beating degree is 26ºSR, and the wet weight is 12 grams; 35kg / ton of paper-enhanced AKD sizing agent and 12kg / ton of paper dry strength are added through the sizing system agent, 0.2kg / ton of paper retention aid, 15kg / ton of paper wet strength agent, and 0.5kg / ton of paper softener, which are prepared into diluted slurry on the Internet, and double-sided dehydration is carried out through the overlapping network to ensure that the fibers are evenly dispersed and vertically and horizontally The fibers are arranged in an orderly and uniform manner; after the wet paper sheet enters the press section and is pressed together, the paper sheet dried to a dryness of 95% enters the sizing section. The agent is made of polyvinyl alcohol and paraffin emulsion, the sizing concentration is controlled at 12%, ...

Embodiment 2

[0026] Embodiment 2: 100 grams of waterproof and antifreeze kraft paper

[0027] The 100% coniferous wood kraft natural color paste is beaten through three conical mills in series, the beating degree is 28ºSR, and the wet weight is 12 grams; 30kg / ton of paper-enhanced AKD sizing agent and 15kg / ton of paper dry strength are added through the sizing system agent, 0.2kg / ton of paper retention aid, 16kg / ton of paper wet strength agent, 0.8kg / ton of paper softener, prepared into a diluted slurry on the Internet, and double-sided dehydration through the overlapping network to ensure that the fibers are evenly dispersed and vertically and horizontally The fibers are arranged in an orderly and uniform manner. After the wet paper sheet enters the press section for compound pressing, the paper sheet dried to a dryness of 95% enters the sizing section. The surface sizing treatment of the paper is carried out by film transfer method, and the surface sizing The agent is made of polyvinyl a...

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Abstract

The invention discloses a manufacturing method of waterproof and antifreezing kraft paper. The method includes the technical steps of conducting beating, batching, wet paper sheet making, pre-drying,surface sizing, after-drying and the like on coniferous wood sulfate unbleached pulp. The invention aims to provide a manufacturing method of waterproof and antifreezing kraft paper, the obtained product has good tensile strength, outstanding bursting resistance, remarkable waterproof and antifreezing effects, can meet the packaging requirements of fresh cold chain food, completely solves the technical problems of no waterproofness and freezing protection performance in existing kraft paper, brings huge economic benefits to enterprises, and improves the enterprise competitiveness.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for manufacturing waterproof and antifreeze kraft paper. Background technique [0002] Kraft paper is generally made of coniferous wood kraft natural color pulp, which is tough, high-strength, and yellow-brown on the paper surface after being beaten on a fourdrinier paper machine. The quantitative is generally 60-120g / m 2 . The quality requirement of kraft paper is flexible and strong, with high tensile strength, tear strength, and burst resistance. It can be used as cement bag paper, paper bag paper, document bag paper, food packaging paper, etc. According to different colors, it can be divided into: primary color kraft paper, red kraft paper, white kraft paper, flat kraft paper, single-gloss kraft paper, two-color kraft paper, etc.; Process kraft paper, insulating kraft board, kraft stickers, etc.; according to different materials, it can be divided into: recycl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/10D21H11/04D21F11/00D21H21/16D21H21/10D21H21/18D21H21/20D21H21/14D21H19/18D21H19/20
CPCD21F11/00D21H11/04D21H19/18D21H19/20D21H21/10D21H21/14D21H21/16D21H21/18D21H21/20D21H27/10
Inventor 李丹刘成良朱宏伟史梦华吴恒刘春景周金涛
Owner YUEYANG FOREST & PAPER CO LTD
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