Water-proof additive speically for pulp moulding and its producing method

A technology of pulp molding and additives, applied in the direction of non-fiber pulp addition, papermaking, textiles and papermaking, etc., can solve the problems of high price, no waterproof effect, harsh use conditions, etc., and achieve high economic value and social benefits

Inactive Publication Date: 2003-04-09
DONGLU PULP MOLDING PROD SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Foreign large-scale professional pulp molding factories use full-automatic production lines to dry the products after using additives. The products move by themselves in a crawler oven at 150-180°C and are dried and formed. The additives they use are relatively high in price. The conditions are harsh, and the product must be dried at a high temperature of 150°C to have a good waterproof effect, while the product dried at room temperature has no waterproof effect

Method used

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  • Water-proof additive speically for pulp moulding and its producing method
  • Water-proof additive speically for pulp moulding and its producing method
  • Water-proof additive speically for pulp moulding and its producing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Preparation of a liquid waterproof additive, the formula ratio used: anhydrous sodium carbonate 2.3, paraffin 8.2, rosin 13, ammonium stearate 1, carboxymethyl cellulose 0.8, water 75. Its procedure is:

[0022] (1) Inject 80-100 kg of clean water into the reactor, turn on the mixer and heat it to 100°C with steam

[0023] about;

[0024] (2) add the anhydrous sodium carbonate of 2 / 3rds of adding alkali amount by hopper, make it all dissolve;

[0025] (3) Add nuclear quantitative paraffin to make it dissolve completely;

[0026] (4) Slowly add the rosin block that has been smashed into the size of a walnut into the reactor;

[0027] (5) Regulate the steam pressure, control the temperature of the reactor to be 102-106°C, and the speed of the mixer to be 240 rpm

[0028] / min, the reaction time is 3 hours;

[0029] (6) add the anhydrous sodium carbonate of other 1 / 3rd addition amount of alkali by hopper, continue reaction one hour;

[0030] (7) Check...

Embodiment 2

[0051] Liquid waterproof additive formulation ratio: anhydrous sodium carbonate 2.2, paraffin 8.4, rosin 13.5, ammonium stearate 1.1, carboxymethyl cellulose 0.8, water 74;

[0052] The solid waterproof additive formula ratio adopts: anhydrous sodium carbonate 12, paraffin wax 33, rosin 46, ammonium stearate 4, carboxymethyl cellulose 4, water<1; its procedure is the same as embodiment 1

[0053] attached image 3 , 4 It is a special reaction kettle for the preparation method of the present invention, and its structure includes a bracket 5 supporting the cylinder body of the reaction kettle, a hopper 2, a discharge port 15, a discharge port valve 14, a motor 11, a transmission belt 10, a stirrer flywheel 9, and a stirring shaft 13. Reaction thermometer 1, thermometer probe 6, reaction kettle cover 16, characterized in that it also includes a jacket 3 surrounding the lower half of the cylinder body, a steam pipe inlet 7 connected to the jacket, a steam pressure gauge 17, and a...

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Abstract

The waterproof additive specially for pulp molding consists of paraffin, rosin and water, and includes liquid waterproof additive and solid waterproof additive in different water content. It features that the composiion also includes anhydrous sodium carbonate and ammonium stearate and carboxyl methyl cellulose. The molded paper product with the said waterproof additive may be dried in the sun or in the air, and has excellent waterproof effect. The molded paper product with the said waterproof additive is the ideal substitute of foamed polystyrene product.

Description

Technical field: [0001] The invention relates to paper product production technology, and in particular discloses a special waterproof additive for pulp molding and a preparation method thereof, which is applied in production fields such as tableware, industrial product packaging, and agricultural flower pots. Background technique: [0002] Pulp molded products are a new type of packaging lining material made of waste paper as the basic raw material and various additives. This product has excellent protection, shockproof, compression and antistatic functions for the packaged items. Its waste can be recycled and reused. Even if it is abandoned and buried, it is perishable and decomposed into natural fiber substances. It is an ideal substitute for expanded polystyrene (EPS) products. [0003] In the production process of pulp molded products, adding a certain amount of waterproof additive can change some characteristics of the product, make the product have good waterproof, mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/11C08L93/04D21H21/02
Inventor 徐明山
Owner DONGLU PULP MOLDING PROD SHANGHAI
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