JP3405359B2 - Moisture and water resistant rustproof paper that can be reused - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to rust-proof paper, and
Moisture and water resistant rustproof paper that can be used as a raw material for recycled paper
About. [0002] 2. Description of the Related Art Generally, vaporized steam has a rust-preventing effect on metals.
A vaporizable rust inhibitor that exhibits
Rust prevention sheets are well known, and metal sheets are used as industrial paper.
It is widely used for storage, transportation, etc. However, paper such as kraft paper is used as the sheet.
The rust-prevention sheet made of paper has water permeability and moisture absorption
The metal wrapped in this rust-proof sheet
If it is placed under moisture, or if the rust-proof sheet
If it gets wet, the metal may get wet and become extremely rusting.
Have a point. On the other hand, polyethylene and polyp are used for kraft paper.
Laminated polyolefin films such as propylene
Apply or impregnate a rust inhibitor on the paper surface of the
The resulting rustproof sheet has a laminated film compared to paper
Has the property of being extremely impervious to water,
When metal wrapped in a rust sheet is placed under high temperature and high humidity
Or when the rust-proof sheet wrapped with metals is wet with water
In addition, the metal hardly wets and exhibits an excellent rust prevention effect. [0005] However, a laminate having such merits
Nate-based rust prevention sheet uses a film
However, there is a problem that it cannot be used as a raw material for
Therefore, it is not preferable in terms of resource saving. [0006] SUMMARY OF THE INVENTION An object of the present invention is to reproduce
Providing moisture- and water-resistant rust-proof paper that can be used as a raw material for paper
It is to be. [0007] SUMMARY OF THE INVENTION The present invention provides a method for printing paper on a paper surface.
The main component is a Tylene-butadiene copolymer resin.
The aqueous coating layer containing no wax component has a dry weight of 3 to
50g / m^Two Range, and the moisture permeability of paper is 200 g / m^Two
-24 hours or less, and a vaporizable rust inhibitor composition layer on the back surface
Moisture resistance that enables recycled paper to be reused
It is an aqueous rust-proof paper. [0008] The resin used in the present invention is styrene-
Butadiene copolymer resins;
Single or colloidal version
Or used together. Styrene-butadiene copolymer
It has the same or better effect than resin
Acrylic acid described in the original application of this application
There are stell resins, but they are not included in the scope of the present invention. The coating liquid for forming the aqueous coating layer includes the above-mentioned resin
In addition to fats, silica, calcium carbonate, and hydroxyl as needed
Aluminum oxide, zinc oxide, titanium oxide, kaolin,
Lamin resin particles, benzoganamin resin particles, urea resin particles
Pigments such as particles and phenolic resin particles; metal soaps, silicone
Release agents such as carboxylic acids and fluorine compounds; surfactants, antioxidants
Stoppers, UV absorbers, antistatic agents, defoamers, thickeners,
Various auxiliaries such as powders and colorants may be added. In addition, this
Auxiliary agents such as are usually 50 times the solid content of the coating solution.
It is added so as to be less than the amount%. The coating liquid is prepared as an aqueous system and is usually
For example, bar coater, roll coater, gravure coater
-, Air knife coater, blade coater, etc.
Using a machine, size or no size bleached kraft paper,
Dry weight on unbleached kraft paper, high-quality paper, etc. 3-50g
/ M^Two Coated in the range. By the way, 3 g / m^TwoIf less than the moisture and water resistance
It is difficult to reach the target level, 50g / m^TwoCrossing
This is problematic in terms of economy. As quality characteristics of resin-coated paper, JI
Water repellency based on SP 8137 is R₈~ R_TenAnd JIS
 2000 g / m2 moisture permeability based on Z 0208^Two・ 24
h or less, and particularly, the water repellency is R_TenAnd moisture permeability
Is 200g / m^Two-The thing of 24h or less is preferable. As the rust preventive used in the present invention, for example,
Dicyclohexyl ammonium nitrite, dicaprylate
Cyclohexylammonium, dicyclohexylurea carbonate
Ammonium, diisopropyl ammonium nitrite, repose
Monoethanol ammonium balates, sodium benzoate,
Benzoic acid, caprylic acid, capric acid, isopropyl benzoate
Butyl, benzoate, butyl cinnamate, carbamic acid
Monium, monoethylamine, diethylamine, monoe
Tanolamine, diethanolamine, triethanol
Amine, morpholine, methyl morpholine, ethyl morpho
Phosphorus, hexamethylenetetramine, benzotriazo
, Tolyltriazole, urea, thiourea, sodium nitrite
Materials known in the art, such as da. The vaporizable rust inhibitor composition used for coating is as follows:
Dispersing or dissolving one or more of the above rust inhibitors in water
Is mixed, and if necessary, binders and alcohol
It is prepared by adding a penetrant or the like. [0015] The coating of the vaporizable rust inhibitor composition is usually carried out using a barco.
Coater, roll coater, gravure coater, airna
Use a coating machine such as an if coater to apply
Will be The coating liquid usually has a dry weight of 2 to 50 g / m.^Two Become
Coated as follows. By the way, 2g / m^TwoIf less than
Low rust prevention effect, 50g / m^TwoIf more than
The strike is extremely high. [0016] The present invention will be described in more detail with reference to the following examples.
Although described, it is needless to say that the present invention is not limited to these. Ma
Parts and percentages in the examples are by weight unless otherwise indicated.
And% by weight. Embodiment 1 80 g / m^Two On one side of neutral no-size unbleached kraft paper,
40% styrene-butadiene emulsion aqueous coating liquid
Is coated with a bar coater at a coat weight of 15 g / m.^Two (Dry weight)
And dried at 115 ° C. to obtain a water repellency of R
_TenAnd moisture permeability is 200g / m^Two-Obtain 24h of resin coated paper
Was. Subsequently, sodium nitrite 20 was added to 60 parts by weight of water.
Parts by weight, 20% by weight of monoethanol ammonium benzoate
The rust-proof coating solution prepared by dissolving the
15 g / m coating amount with a bar coater on the back^Two(Dry weight
Amount), dried at 115 ° C and rust-proof paper
It was created. The resulting rust-proof paper is resistant to iron under high temperature and high humidity.
Shows good rust prevention ability, and is disintegrated into raw material for recycled paper.
Could be used. Reference Example 1 80 g / m^Two On one side of neutral no-size unbleached kraft paper,
40% acrylate emulsion (trade name: sa
Ibinol X-590-376E-5, Siden Chemical
Coating amount of aqueous coating liquid with a bar coater is 15 g / m
^Two(Dry weight) and dried at 115 ° C
And the water repellency is R_TenAnd moisture permeability is 200g / m ^Two・ 24h
A resin-coated paper was obtained. Then, add nitrous acid sodium to 60 parts by weight of water.
20 parts by weight, monoethanol ammonium benzoate 2
0 parts by weight of the rust-preventive coating solution was
15g / m coated amount with bar coater on back side of paper
^Two(Dry weight) and dried at 115 ° C
To make rust-proof paper. The resulting rust-proof paper is subjected to high temperature and high humidity.
Shows good rust-preventing ability against iron, and is defibrated to make recycled paper
It could be used as a raw material. Reference Example 2 Acrylic ester emulsion (trade name: Cybineau)
X-590-376E-5, manufactured by Seiden Chemical)
The coating amount is 2 g / m^Two(Dry weight)
Same as Reference Example 1 except that smeared resin-coated paper was used.
To obtain rust-proof paper. The obtained rust-proof paper is disintegrated and used for recycled paper.
Can be used as a raw material, but rustproof against iron under high temperature and high humidity
Noh was extremely poor. Comparative Example 1 80g / m instead of resin coated paper^TwoNeutral no size not yet
On one side of bleached kraft paper, a polyethylene-laminated paper
A rustproof paper was obtained in the same manner as in Example 1 except that a sheet was used.
Was. The obtained rust-proof paper has good resistance to iron under high temperature and high humidity.
Demonstrated rust-preventive ability, but could not be disaggregated and used as raw material for recycled paper
could not. [0022] The rust-proofing paper of the present invention can resist iron under high temperature and high humidity.
Shows good rust prevention ability,
It was usable.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shunsuke Shioi 4-3-1 Jokoji Temple, Amagasaki-shi, Hyogo Oji Paper Co., Ltd. Kanzaki Mill (56) References JP-A-61-97496 (JP, A) 59-160227 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) D21H 19/00-27/42

Claims (1)

(57) Claims 1. An aqueous coating layer containing a styrene-butadiene copolymer resin as a main component and containing substantially no wax component on a paper surface having a dry weight of 3 to 50 g / g. provided in m ² range,
A moisture- and water-resistant rust-proof paper which can be recycled and used, characterized in that the paper has a moisture permeability of 200 g / m ² · 24 h or less and a vaporizable rust preventive composition layer is provided on the back surface.