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Multifunctional carpentery stuffing and its compounding process

A multi-functional, wood-based technology, applied in the field of adhesive fillers, can solve the problems of shortened pre-pressing time, single flour function, lower free formaldehyde content, etc., achieves improved cold adhesion fastness, improved finished product indicators, and is easy to popularize applied effect

Inactive Publication Date: 2004-06-23
江苏众诚新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a technical breakthrough must be made in this area. In addition to the urea-formaldehyde resin itself to greatly reduce the free formaldehyde content, the glue filler is also required to contribute to this, and the flour has a single function and does not have the function of reducing formaldehyde.
[0004] In recent years, many large and medium-sized plate-making enterprises have updated or introduced advanced equipment in large quantities to facilitate large-scale continuous production operations. If flour or only artificial sodium bentonite is used as filler, the pre-pressing performance cannot meet the requirements of the pre-pressing process.
[0005] In addition, the low free formaldehyde urea-formaldehyde resin glue itself has poorer initial tack and preloading properties (compared to the glue before the aldehyde reduction), and it is urgent to add fillers in the glue to assist and make up, so as to shorten the preloading time and preload. The press plate is resistant to mechanical impact, while flour and ordinary fillers are difficult to make a difference in this respect

Method used

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  • Multifunctional carpentery stuffing and its compounding process
  • Multifunctional carpentery stuffing and its compounding process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Formula ratio: A material 72; B material 20; C material preferably carboxymethyl cellulose 4; D material 1; E material 2; F material preferably oxalic acid 1. Take the production of 1000kg filler as an example, the implementation method is as follows:

[0037] 1. Material A is desanded, dried, and ground to 200 mesh, and weighed 720kg for use;

[0038] 2. Material B is passed through a powder sieving machine to obtain a fine powder of more than 80 meshes, and 200kg of fine powder is weighed for later use.

[0039] 3. Transport material A, material B and other ingredients in the formula: 40kg carboxymethyl cellulose, 10kg melamine, 20kg urea, and 10kg oxalic acid to a high-speed rotary gravity-free mixer, shear and stir by the high-speed mixer Allow about 20-30 minutes to mix well.

[0040] 4. The mixed materials are naturally stored for 3-7 days, and the finished product is basically stable.

[0041] 5. The above formulas are all powder materials, and the fineness of...

Embodiment 2

[0043] Formula ratio: A material 70; B material 20; C material preferably carboxymethyl cellulose 2; D material 1.5; E material 2; F material preferably oxalic acid 3; G material preferably sodium carbonate: 1.5. Take the production of 1000kg filler as an example, the implementation method is as follows:

[0044] 1. Mix 700kg of material A with 15kg of material G, grind for about 30 minutes, store naturally for more than 3 days, fully carry out sodium modification, then dry and grind to make modified material A, with a fineness of more than 120 mesh .

[0045] 2. Material B is passed through a powder sieving machine to obtain a fine powder of more than 80 meshes, and weigh 200kg of the fine powder for later use.

[0046] 3. Transfer the modified A material, B material and other materials in the formula: sodium carboxymethyl cellulose 20kg, melamine 15kg, urea 20kg, oxalic acid 30kg, to a high-speed rotary gravity-free mixer, and then sheared by the high-speed mixer Cut and s...

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Abstract

The multifunctional carpentery stuffing consists of component A of one selected from bentonite, attapulgite and kaolin in 45-80 wt%; component B comprising one of wood powder, corn cob powder and stalk powder in 15-40 wt%, densifier in 2-15 wt%, melamine in 0-2 wt%, urea in 0-3 wt%, and acidity regulator in 0-4; and G component sodium salt in 0-3 wt%. The compounding process includes ore dressing, eliminating sand and grinding to obtain component A; mixing component A and component G, grinding, storing, sodium modifying and fine grinding; high speed shearing and mixing all the materials in a high speed rotary no-gravity mixer. The plywood with the said stuffing has less formaldehyde releasing amount, improved waterproof, antiaging, flexibility and other performances and low production cost. The stuffing may be used in replacing available stuffing.

Description

1. Technical field: [0001] The invention relates to an adhesive filler, and in particular discloses a special multifunctional filler for wood industry, which is used in the adhesive of wood-based panel manufacturing—urea-formaldehyde resin glue, as a new generation of functional filler. 2. Background technology: [0002] Urea-formaldehyde resin glue is a thermosetting polymer adhesive material widely used in the man-made plywood manufacturing industry, but it is limited by the synthesis conditions and the storage stability of the produced glue solution. The commercially available resin glue solution is very thin, with a water content of about 50 % up and down, it is more difficult to use directly. Since the advent of urea-formaldehyde resin glue in the domestic and foreign plywood industry in the 1960s, flour processed from agricultural products wheat has been added to the glue as a filler to increase the consistency and initial viscosity, so as to reduce the penetration of ...

Claims

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Application Information

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IPC IPC(8): C09J11/08
Inventor 胡飞
Owner 江苏众诚新材料科技有限公司
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