JPS60141557A - Film changed into mat - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a matte film used as a support for a transfer sheet for PPC, a trafting film for drafting, a second original film for diazo copying, and the like.

Conventional matte films generally have a matte layer containing a resin binder and a filler such as silica powder or glass powder as a matting agent on a plastic film support.
Examples of binders include acrylic resin and vinyl chloride.
Vinyl thermoplastic resins such as vinyl acetate copolymers (JP-A-50-136363, JP-B-1152, etc.), formaldehyde-based thermosetting resins such as melamine resins, phenol resins (JP-A-49-37585, Japanese Patent Application Publication 1973-
No. 38771, No. 50-141683, etc.) are known. Such a matte film is used as a support for transfer sheets for RPC (plain paper copying machines), drafting film for drafting, and second original film for diazo copying, so it is especially important to avoid delamination during use. The matte layer should have good adhesion to the film to prevent the matting layer from forming, and it should have a high surface hardness so that it cannot be scratched during use or during addition.When used as a transfer sheet, the toner image correction liquid (organic solvent It is equipped with a solvent-resistant material to prevent it from being immersed in water (used), and it also prevents the generation of strange odors during heat fixing of toner images.
It must be thermally stable to prevent discoloration. 1. It must have low curling during use or storage, not only from a quality standpoint, but also from the standpoint of preventing double feeding and paper jams in the copying machine. When used as a support for a second original film, it is required to have little influence on the diazo photosensitive layer such as a decrease in image density during storage.

However, there is no conventional matte film that satisfies these properties at the same time; for example, those using vinyl thermoplastic resin as a nounder have poor adhesion to the film and poor 110'j solvent resistance, and are prone to curling. , f, and those using formaldehyde-based thermosetting resins have the disadvantage that formaldehyde gas with an irritating odor is generated during thermal fixation of toner images, making the working environment poor. In order to improve interlayer adhesion, a linear subbing layer of foamed polyester resin, urethane resin, etc. is provided between the support and the matte layer (JP-A-51-108826, JP-A-52-73985). No. 54-43017, No. 54-
No. 97684, etc.) have been proposed, but this increases the number of steps for coating the undercoat layer and does not improve other performances.

Object The object of the present invention is to provide a matting film, nI film, which satisfies interlayer adhesion, surface hardness, solvent resistance, curl stability and thermal stability, and which has little influence on the diazo photosensitive layer.

Structure: The matting film of the present invention has a matting layer on a plastic film support, which contains an acrylic polyol resin having an acid value of 3 or less, an aliphatic incyanate, a styrene-anhydride maleic branched copolymer or its ester, and a polyester. It is characterized by having the following.

The acrylic polyol resin used in the present invention is a resin containing a hydroxyl group, and is a resin consisting of a copolymer of a monomer, an unsaturated acid, and, if necessary, other polymerizable monomers, and the hydroxyl group-containing monomer is hydroxy (meth)acrylate. , N-hydroxyalkyl (meth)acrylamide, and the like. In addition, unsaturated acids include (meth)acrylic acid, itaconic acid, α-methylene geltaloic acid, maleic acid,
Examples include crotonic acid and anhydrides thereof. In addition, other polymerizable monomers include methyl acrylate, methyl methacrylate, butyl acrylate, butyl methacrylate, 2-ethylhexyl acrylate, lauryl methacrylate, and rhexylacrylate. -methylstyrene, β-
Styrene derivatives such as chlorstyrene and P-bromostyrene; organic nitriles such as acrylonitrile, methacrinitrile, and methylene geltalonitrile; organic acid vinyl esters such as vinyl acetate, vinyl propionate, and vinyl inpropionate; (meth) Examples include acrylamide, N-alkoxyalkyl (meth)acrylamide, etc., which are appropriately selected and used depending on the purpose.

The acrylic polyol resin of the present invention can be easily produced by solution polymerization in a ketone, aromatic or ester solvent having the monomer component Y as described above, but the acid value of the acrylic polyol resin thus obtained is 5 or less, Preferably it should be between 0.5 and 3. If the acid value exceeds 5, the adhesion to the film (hereinafter simply referred to as adhesion) will be insufficient.The molecular weight is 10,000 to 4,000.
About 0 is preferable. If it is less than 10,000 Y, it is disadvantageous in terms of solvent resistance and hardness, and if it exceeds 40,000 Y, the viscosity of the matting layer forming liquid increases, making it unsuitable for mass production. Further, the appropriate OH value is about 20 to 80.

Examples of aliphatic incyanates include hexamethylene diisocyanate (HMDI), derivatives thereof, and adducts thereof.

In any case, the proportion of acrylic polyol resin and aliphatic incyanate is 0.8 in equivalent ratio (NCOloII).
-2.0, preferably 1.0-1.6. If it is less than 0.8, adhesion, solvent resistance and stain resistance are insufficient;
Moreover, if it exceeds 2.0, drying of the matting layer is poor.

This is inappropriate in terms of production technology, and the adhesion is also poor.

Next, the styrene-maleic anhydride copolymer or its ester preferably has an acid value of 200 to 500. If the acid value is less than 200, solvent resistance will be insufficient, and if it exceeds 500, adhesiveness will decrease. The amount used is 1 part of the total resin.
0''-40% is preferable. If it is less than 10%, the curl stability will be decreased, and if it exceeds 40%, the adhesiveness will be decreased. The appropriate molecular weight is about 1,000 to 3,000.

As the fins, powders of silica, glass, alumina, titanium oxide, silica, etc. are used. The amount used is filler/
1/0.5 to 1/20 of 118 fat is suitable.

Support films include polyester, polysulfone,
Films of polyphenylene oxide, polycarbonate, cellulose acetate polyamide, etc. are used.

The thickness varies slightly depending on the purpose of use, but generally the thickness is 0 to 2.
Approximately 00 Jim is appropriate.

To make the matte film of the present invention, on a plastic film support, an acrylic polyol resin having an acid value of 5 or less, an aliphatic incyanate, a styrene-maleic anhydride copolymer or its ester, and a polyamide 2- After applying and drying the organic solvent paint, the paint film may be cured by heat treatment to form a matte layer.

The thickness of the matting layer varies depending on the purpose of use, but generally 5 to 15 μm and 8 degrees is appropriate.

In addition, ketones (e.g. acetone,
methyl ethyl ketone, methyl indithyl ketone, cyclohexanone), esters (e.g. methyl acetate, ethyl acetate, butyl acetate, ethyl lactate, glycol acetate, monoethyl ether A/), aromatic hydrocarbons (e.g. benzene, toluene, xylene)
Those without OH group are preferable.

More preferred are ketone solvents. This is because - the pot life of the liquid is extended due to the masking effect on the dispersed urethane paint.

Examples of non-invention are shown below. Note that both parts and parts are based on weight.

Example 1 Acrylic polyol resin with acid value 2.5 (molecular [2400
0, OH value 48.5; methyl acrylate 10%, acrylic/I/ethyl acid 10%, butyl acrylate 15%, acrylic [1%, β-hydroxyethyl methacrylate 25
% and 39% styrene. ], 68 parts of 50% xylene bath solution, styrene (50%) to maleic anhydride (50 parts)
%) copolymer (acid value 480° molecule fJ (1600) 8
．． 5 parts, silica powder (Syroid 3 manufactured by Fuji Davison)
0B) 6 parts, silica powder (Rysta 2ite FM manufactured by Ryumorisha)
-1) 24 parts of 40 parts and 80 parts of methyl isozotyl ketone
After mixing and dispersing in a gram mill for an hour, 19.5 parts of hexamethylene diinocyanate derivative (Desmodur N-75, manufactured by Bayer AG, West Germany) was added to form a coating for forming a matting layer, and this was applied to a 50 μm thick polyester film. It is coated onto the top to a dry thickness of 9 μm, dried at 120°C for 1 minute, and then heat-treated at 150°C for 5 minutes to harden the coating and form a matte layer. created a film.

Example 2 Acrylic polyol resin crushing in paint for forming matte layer
'a' is 52 parts, styrene-maleic acid copolymer is 20 parts, and Desmodur N-75 is 15 parts.
A matted film was prepared in the same manner as in Example 1, except that

Example 3 Styrene (50 qb) - maleic anhydride 111 (50%) copolymer (acid value 480, molecule f 41,600) in the paint for forming a matting layer. Polymer (acid value 2755 molecular weight 19
A matted film was prepared in the same manner as in Example 1, except that 00) was used.

Comparative Example A composition consisting of 145 parts of Crystallite FM-10 parts of Thyroid 308 and 90 parts of methyl cellosolzo was mixed and dispersed in an I-lumil for 24 hours, and then mixed with melamine resin (Kneepan 60R manufactured by Mitsui Toatsu Chemical Co., Ltd.) 2
0 parts was added to prepare a matte layer forming coating material, and a matte film was prepared in the same manner as in Example 1 using this coating material.

Next, for each of the above matte films, interlayer adhesion 1 surface hardness, solvent resistance, curl stability, thermal stability, and influence on the diazo photosensitive layer (evaluated by decrease in image density after storage as a second original film) were evaluated. Tested. The results are shown in the table below.

Interlayer adhesion: Sample ftl Q times by hand, then after pasting cellophane Teiso on the surface of the matte layer, it was peeled off, and the degree of peeling of the matte layer was evaluated using a 5-point evaluation method with 5 being no peeling and 1 being peeling all over. evaluate.

Surface hardness: JIS 5401 lead silver hardness test Lead work hardness test Agent properties: Number of times the matted layer surface was rubbed with cotton soaked in acetone until the support film surface appeared 〇 Curl test A: Sample heated at 23°C, 55% The maximum curl value after being left in an RH environment for 30 days; a 10 value indicates curling towards the matte layer side, and a - value indicates curling towards the support side.

Curl test B: Place the sample in a constant temperature bath at 70℃ for 1 minute. Maximum canyl value after setting. Ten values and - values are as described above.

Thermal stability: The presence or absence of formaldehyde odor when images are continuously transferred and thermally fixed to the sample using a commercially available PPC camera. Good: No formaldehyde odor, Bad: Formaldehyde odor.

Decrease in image density after storage: A diazo photosensitive solution is applied to the support side of the sample and dried to provide a diazo photosensitive layer to form a second original film, which is then made into two sheets so that the matte layer and the diazo layer are in contact with each other. Difference in image density from before storage when copied using a commercially available diazo copying machine after being stored in an environment of 50°C and 801RH for 3 days.

Effects As is clear from the above explanation, the matte film of the present invention uses a specific acrylic polyol resin, aliphatic incyanate, and styrene-maleic anhydride copolymer as binder components, so it has excellent interlayer adhesion and surface hardness. ,
Solvent resistance, curl stability, and thermal stability can be improved, and the influence on the diazo photosensitive layer can be reduced.

Claims (1)

[Claims] 1. A matted film 0 comprising a plastic film support provided with a matting layer containing an acrylic polyol resin having an acid value of 5 or less, an aliphatic incyanate, a styrene-maleic anhydride copolymer or its ester, and a filler.