Adhesive resin for formaldehyde-free plywood and preparation method

A technology for bonding resins and plywood, applied in the direction of adhesives, adhesive types, adhesive additives, etc., can solve the problems affecting the initial bonding performance and bonding durability, poor wettability, large cohesive energy, etc., and achieve low cost , Improving wettability and simplifying the production process

Pending Publication Date: 2019-02-15
HEYUAN PLG MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Judging from the above patented formula and process, its cohesive energy is relatively large, which makes its wettability poor, thus affecting its initial bonding performance and bonding durability

Method used

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  • Adhesive resin for formaldehyde-free plywood and preparation method

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Effect test

preparation example Construction

[0031] The preparation method of the above-mentioned adhesive resin for formaldehyde-free plywood is to extrude and granulate each component of the above-mentioned raw material formula according to the above-mentioned proportions by using a twin-screw extruder to perform a plasticizing and blending process.

[0032] The above-mentioned low-density polyethylene is a copolymer of ethylene and a-olefin, with a density of 0.91-0.94g / cm 3 , The melt index is 2-18g / 10min.

[0033] The preparation of the above-mentioned functionalized modified polyethylene, its raw material formula is as follows (the following is the weight percentage content): 60%-90% high-density polyethylene, 10%-30% low-density polyethylene, 0.1%-5% Malay Acid anhydride or acrylic acid, 0.01%-0.5% of bis-2,5-hexane or dicumyl peroxide, fully mixed, and granulated through a reactive twin-screw extruder, the twin-screw extruder The temperature is controlled at 160°C-230°C, the screw speed is controlled at 250-450r...

Embodiment 1

[0040] A raw material formula (below is weight percent content) of adhesive resin for formaldehyde-free plywood is as follows:

[0041] 55% LDPE

[0042] 30% functionalized modified polyethylene

[0043] 5% Polyurethane

[0044] 10% polyolefin elastomer

[0045] 0.1% thermal oxygen stabilizer

[0046] Wherein the raw material formulation of functionalized modified polyethylene (below is weight percent content) is as follows:

[0047] 88.7% HDPE

[0048] 10.6% LDPE

[0049] 0.6% maleic anhydride monomer

[0050] 0.1% bis-2,5-hexane

Embodiment 2

[0052] 55% LDPE

[0053] 23% functionalized modified polyethylene

[0054] 10% Polyurethane

[0055] 12% Polyolefin Elastomer

[0056] 0.1% thermal oxygen stabilizer

[0057] Wherein the raw material formulation of functionalized modified polyethylene (below is weight percent content) is as follows:

[0058] 83.85% HDPE

[0059] 15% LDPE

[0060] 1.0% maleic anhydride monomer

[0061] 0.15% bis-2,5-hexane

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Abstract

The invention discloses adhesive resin for formaldehyde-free plywood. After being subjected to film blowing or tape casting film formation, the adhesive resin is applied to an adhesion layer between veneers in a core board of the plywood or between the core board and a face plate; by means of improvement of a formula and a production technology, wettability of polyethylene is improved, meanwhile,with addition of polyurethane, adhesion property and adhesion persistence of the plywood are improved, the plywood contains no formaldehyde, has excellent water resistance and heat resistance and particularly is high in adhesion strength, good in water resistance, low in cost and simple in process, the adhesion material with both social and economic benefits is provided for the field of the plywood, and an excellent technical scheme is provided for industrialization.

Description

technical field [0001] The invention belongs to the field of polymer functional materials, relates to the technical field of hot melt adhesives, in particular to an adhesive resin for formaldehyde-free plywood and a preparation method thereof, which is mainly used as veneer / single board or core board in plywood core boards / Adhesive layer between panels. Background technique [0002] In recent years, people's awareness of environmental protection has been increasing year by year, and they are paying more and more attention to the impact of their living environment on health. At the same time, the country's requirements on the formaldehyde content of wood-based panels have become more stringent, so higher requirements have been placed on the environmental protection performance of adhesives. . [0003] Formaldehyde is contained in traditional aldehyde adhesives, and formaldehyde is a strong carcinogen, which is harmful to people's health. In my country's wood-based panel i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J175/04C09J123/28C09J11/06
CPCC08L2201/08C08L2205/025C08L2205/035C08L2207/066C09J11/06C09J123/0815C08L75/04C08L23/0815C08L23/28
Inventor 范德辉黄昌政
Owner HEYUAN PLG MATERIALS
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