JPS62231731A - Preparation of soft polyvinyl chloride film with good feeling and fine embossed patterns - Google Patents

Abstract

PURPOSE:To obtain a soft polyvinyl chloride film with fine embosses patterns by coating a soft polyvinyl chloride resin compsn. containing more than specific quantity of a plasticizer with another thermoplastic resin of a weak interlayer adhesion to form a laminated film and by peeling it into each layer. CONSTITUTION:A soft polyvinyl chloride resin containing a plasticizer is put into a hopper 10, mixed and melted in an extruder 6. On the other hand, another thermoplastic resin with a weak interlayer adhesion is into a hopper 11, mixed and melted in an extruder 7. These melted resins are laminated in a co-extrusion T-die and the laminated film thus obtained is rolled up by a roller 1. This laminated film is peeled into each layer between a roller 2 and a roller 3. Fine embossed patterns are formed at this time on one surface of the soft polyvinyl chloride resin film. The plasticizer loadings are defined to be more than 40pts. wt. per 100pts.wt. of polyvinyl chloride resin in order to balance between its softness, strength and fine embossing. The case of less than 40pts.wt. of the plasticizer loadings should be excluded because it is difficult to form the embossed patterns, the surface becomes plain and the feeling gets hard and rough.

Description

DETAILED DESCRIPTION OF THE INVENTION 1-Field of application of Sanjo 1 The present invention relates to a method for producing a soft vinyl chloride resin (oil film) having a finely textured surface. The present invention relates to a manufacturing method.

[Conventional technology 1] Vinyl chloride resin is one of the four major general-purpose thermoplastics including polyethylene, polystyrene, and polypropylene (it has good compatibility with various additives among fats, and can be used for various purposes ranging from hard films to ultra-soft films).
It is possible to design the hardness and softness of the film, and various properties can be imparted by changing the type of additives.
In addition, it can be manufactured in a wide range of thickness L (1,01 x -10 + aI11), and is extremely versatile and has a wide range of uses.

These uses include clothing such as clothing, diaper covers, etc.
Good tactility is required for applications that come into contact with people, such as tablecloths, curtains, interior decorations, agricultural films, etc.

Vinyl chloride (for greasy film, feel (touch 1)
), it is better to soften the film by adding a plasticizer (iJA) to the film.
- By softening the pressure, the stickiness increases and the texture becomes worse.

For this reason, in soft vinyl chloride film containing plasticizer,
In the conventional film-forming process of soft vinyl chloride, that is, rolling with a calendar roll in the case of one-calender method] Immediately after the second line,
In the extrusion method, texture is improved by adding grain to the film in the embossing step immediately after film formation using a T-shaped tool.

This bonsing process and
= A soft vinyl chloride film that is in a temperature range that can be wrinkled is fed between a metal roll (textured roll) and a rubber roll that rotate in one direction, and then pressed between the grained metal roll and the rubber roll. ing.

In the graining method described in 1-, the film is compressed for a short period of time while passing between a metal roll and a rubber roll, so that sufficient grains may not be transferred to the film surface or may be formed on the film surface. The grain may return to its original shape, making it shallower than the engraved embossing roll.
, there was a phenomenon in which the surface became ugly, and it was impossible to provide sufficiently fine graining.

[Problem to be solved by the invention, α1 The present inventors have conducted extensive research on ways to improve the stickiness of soft vinyl chloride films, and have developed a completely new method that does not involve embossing. As a result, we have completed a method for producing a soft vinyl chloride film with a fine uneven pattern.

``Means to solve the problem 1 The spirit of the present invention~'1 is vinyl chloride-based 4Al llll't
A soft vinyl chloride resin composition containing 40 fl ft of plasticizer is used for the width of the sacrificial part. A soft polyvinyl chloride with a good texture and a fine uneven pattern on the surface, which is formed into a grainless film whose screen or one side is covered with # and Q resin, and then peels off during J ('f) The present invention relates to a method for producing a resin film.

The present invention will be explained in further detail below.

The method of producing a fine uneven pattern on the vinyl chloride film of the present invention is inflation molding or T-gui forming 7F1'!
Therefore, a soft vinyl chloride resin 11'rt composition and another thermoplastic 1j4 IM with a weak joint force are fed into separate extruders or into one die, and the so-called joint composition is laminated and integrated within the die. A method in which a laminated film is formed by an extrusion method, and the thermoplastic resin layer and the soft vinyl chloride resin layer are delaminated in the subsequent steps of drawing down, cooling, and winding the laminated film, or a soft vinyl chloride resin EL14111 This film is coated with another thermoplastic material (with a low layer contact force) by heat-melting λ1 on both sides or one side.
A method of peeling off the film, and a method of peeling the soft vinyl chloride resin film on both sides or one side of the film and the weak interlayer adhesion 11
The thermoplastic resin layer of 1- is melted and extruded to form a product J! There is a method in which the film is peeled off for four times and then for J (4 times). This method forms a fine uneven pattern on the surface of the soft vinyl chloride resin film.

The method of the present invention will be explained in a more detailed manner with reference to the drawings.

Figure 1 shows 5! of the soft vinyl chloride film of the present invention. !
This is a schematic explanatory diagram showing an example of an apparatus (τ) for carrying out the method, in which 1.2, 3.4.5 are rolls, and 6.7
is an extruder, 8 is an idle roll, 9 is a winding device, 10
．． 11 is a puncher, 12 is a coextrusion machine, and 1: ( is a crusher.

In the first evening 1, a soft vinyl chloride resin is put into the hopper 10, kneaded and melted by a pusher 111 and a blower 6. Also, another thermoplastic 1 month Ift is put into the 2 part 11, mixed and melted in the extruder 7 1, these molten IB4 resins are laminated in the extrusion T The film is collected into roll 1. This product J?'1 film is delaminated between roll 2 and roll. An uneven pattern is formed.

This film is guided by rolls 4, 5, and rolls 8, and is taken off by a winding device 9.

The other separated thermoplastic film is roll 3.
After that, it is finely pulverized by a pulverizer and put into a hopper 11. Through this process, the thermoplastic material can be rolled up and used for other purposes without having to be crushed.

Next, a method using a coextrusion method will be briefly explained.

jfi A soft vinyl chloride resin film of appropriate thickness and a thermoplastic resin film of type A with weak interlayer adhesion, or two other thermoplastic resin films sandwiching the soft vinyl chloride resin film. A laminated film is produced by stacking and heat-pressing the collapsible films and melting λ1 integrally, and then peeling off the layers to produce an extremely fine wrinkled pattern on one or both sides of the soft vinyl chloride + 34 fat film.

(Not shown) Regardless of the coextrusion method or the film thermocompression bonding method, extremely fine fringed patterns are produced between soft vinyl chloride resin and other thermoplastic 11M materials with weak interlayer adhesion. However, when the layers intersect with each other, an extremely finely intricate state is formed.Next, when the layers delaminate, the two pieces are separated, and as a result, extremely fine irregularities are formed on the surface. It is thought that this forms a shiba.

Comparing the coextrusion method with other methods such as film thermocompression bonding, the coextrusion method is easier to adjust and is suitable for uniform patterning.

The soft vinyl chloride resin composition or film thereof of the present invention contains a vinyl chloride resin, a plasticizer, and a stabilizer as L components, and optionally includes an ultraviolet absorber, an antioxidant, a processing aid,
It may contain various resin additives such as anti-static 11-shavings, anti-mold shavings, and coloring agents.

In the present invention, vinyl chloride resin (fat) includes not only polyvinyl chloride but also vinyl chloride (fat) and copolymers.Li which can be copolymerized with vinyl chloride resin
Examples of the tIi form include vinylidene chloride, ethylene, propylene, acrylonitrile, and vinyl acetate.

Examples include acid, maleic acid, itaconic acid, acrylic acid, acrylic esters, methacrylic acid, methacrylic esters, and the like. Vinyl chloride +34 fats may be one type or a mixture of two or more types.

The vinyl salt resin may be manufactured by any of the conventionally known manufacturing methods such as the suspension method, the 716 chemical method, the solution combination method, and the bulk method.
Vinyl chloride + J (degree of polymerization of fat is 800 □su3()0
0 range is used, but 1 (+ (1(1), 250 (l range is preferred.
If it is less than 00, the film will be brittle and easily tear.

If the degree of polymerization exceeds 25 (10), the range of processing conditions is narrow, and there is a tendency for devitrification due to insufficient kneading or decomposition due to internal heat generation of the fat.

Examples of the qfJ agent used in the present invention include commonly used agents such as 7-talic acid plasticizers, anopic acid plasticizers, and epoxy plasticizers. These may be used singly or in combination of two or more. In order to balance the flexibility, strength, and fine grain of these plasticizers (i#, Filno), vinyl chloride resin
00 market volumeFFLimited to 40 market parts or more per S.

T14, which does not have a plasticizer blend of 40 layers, is excluded because unevenness is difficult to form and the surface is smooth, giving a hard and rough texture.

To obtain a soft vinyl chloride-based + A (fat composition, for example, a plasticizer, a stabilizer, and, if necessary, 11 tl of additives) are mixed with the vinyl chloride-based resin. It is sufficient to weigh 6 sides and use a conventionally known mixer such as Ribbon Blengu, Super Mixer, etc.

In order to use the O(fat!fLt&) thus obtained as the soft vinyl chloride resin composition of the present invention,
The resin composition of Section 1 is used as a triblend which is cooled and dried so as not to form lumps, or it can be kneaded using a known mixing method such as a Banbury mixer or a Koni Goo.
It can be crushed or cut into R-shaped solids (pellets, chips), but either method is fine.

ft1u thermoplastic used in the present invention! ”/I (/I: 1
4 (Examples of fats include low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene,
Polybutene-1, poly-4-methylpentene-1, polyisobutylene and their co-ITs [polyolefins such as unions; polystyrene, poly-methylstyrene and their co-width carriers; vinyl acetate content 15% by weight Copolymers of the following olefins and vinyl acetate, ethyl acrylate-containing vinyl materials such as copolymers of olefins and ethyl acrylate containing 1% or less of monomer type; polyalkylene oxides and their Jt , In combination; thermoplastic cellulose such as ethyl cellulose, cellulose acetate, cellulose phosphate, hydroxypropyl cellulose, etc.; polyester such as polyethylene isoheptalate:
Examples include polyamides such as poly-ε-caprolactam, polyhexamethylene 7 diboamide, and polyhexamethylene sebacamide; ionomer resins; and the like.

Among these, low density polyethylene and linear low density polyethylene are soft vinyl chloride +! It is preferable because it has a processing temperature close to that of 74 flit, is inexpensive, and has good thermal stability.

The soft vinyl chloride thread-pulled 11W film of the present invention is 0.0
5"5111111] 17 taste tn mono h'& F: 4
Shy.

[Effect of the invention 1 The film obtained by the present invention has a surface with a fine uneven pattern, so it feels good to the touch and gives a high-class image 6. Applications include curtains, raincoats, tapes, tablecloths, There are many examples such as diaper covers, desk mats, book covers, etc., and the utility value of Santu 1- is great.

[Example 1] Next, the present invention will be described in detail based on Examples, but the present invention is not limited to the following examples unless the essential points 19 are exceeded.

The measurement results shown in the Examples and Comparative Examples of the present invention were obtained by the following method.

1. Measurement of surface unevenness pattern 1-1 Average surface roughness 10,000fl! Surface shape measurement rock (precision model SE-3) 1-2 SEM observation Scanning electron microscope MIN-
8FM-9> 2, Impact strength 2-1 Thickness 1 (1(')μ, Medium 10(tsu, Length 1
After leaving the 0C+n sample piece in an atmosphere at -5°C for 1 hour, the impact strength was measured using a puncture film impact tester. A single 2 inch spherical gate was used.

Example 1 Using the device t shown in FIG.
n) Niphori-hinyl chloride resin (degree of polymerization 17 (1(1)
Plasticizer ([') Oll )7 for 100 parts of ti
(1 part by weight, phosphate ester plasticizer 5 claw part, Ebiko) 82 +1 (epoxy compound) 2 claw part, r
3a 7. n-type limited stabilizer 1, 5 ilr [eye area,
X tear') nfm t<') uA 0,5
Heavy, j+j n, zinc stearate 1), S
rTI electrical part and ethylene bisstearamide 0.5 city 1
．． 1 part, a pellet of soft vinyl chloride resin composition containing 1 part was supplied, while extrusion 1'3.7 (4oφ111111)
A pellet of 1° density polyethylene (density 5 inch) was supplied to each of the tubes, and each was extruded at 180°C.
A molten film consisting of two layers is formed by supplying the film to the goo, and the film is placed close to the goo. ') (Delamination occurs between the take-up roll 2 and roll 3 on the 1"C roll.

Among the peeled films, a soft vinyl chloride resin film was wound up to obtain a film with a thickness of 100 μm and a fine texture of 10 μm in thickness and a fine textured pattern.

Comparative Example [Extrusion using the same device shown in Fig. 1
■) to polyvinyl chloride O (fat (degree of polymerization 170 (1) 10
Plasticizer (D OP ) 2017'i for 0 ton 1^ part
l.

parts, 5 parts by weight of phosphate ester plasticizer, Ebiko) 82
) 1 (epoxy compound) 2 parts by weight, Bu 7. 1.5 parts by weight of n-based Hikisuke stable cutting, barium stearate 11.51
A pellet of a soft vinyl chloride resin composition containing 1° ['i part], 0.5 part by weight of zinc stearate, and 0.5 part by weight of ethylene bisstearamide was supplied. A soft vinyl resin film with a soft timing ratio of 1 was prepared in the same manner as in Example 1.
The film obtained had a smooth surface and a rough texture. .

Example 2 Extrusion H! using the apparatus shown in FIG. ('1(65φl1lI
fl) with polyvinyl chloride resin 10 (
11'i,! if. Ft %/I cutting (DOr
-') 70 tons! t, parts, phosphate ester plasticizer 5 parts, Ebiko) 828 (epoxy compound) 2+Tcti
1 part, 1la-Zn composite stabilizer 1.51T [t, l;
parts, barium stearate 0,51T11it, parts,
A pellet of a soft vinyl chloride resin composition containing 0.5 parts by weight of zinc stearate and 0.5 parts by weight of ethylene bisstearamide was supplied, and the following procedure was carried out in the same manner as in Example 1. A soft vinyl chloride resin film having a II#I uneven pattern was obtained. This was a devitrified film.

Example 3 Extrusion g6 (65φ10) using the same apparatus shown in FIG.
1 part ^・1 plasticizer (I') OP)? <1 part, phosphoric acid ester type available W! 51'l'j ij,
part, two pico-) 82B (epoxy compound) double part, [
3a-7, n-type stabilizer 1, 5ITIfii part,
A pellet of a soft vinyl chloride resin composition containing 1 part of barium stearate, 2 parts of zinc stearate, 2 parts of 5-fold chamber, and 0.5 ton part of ethylene bisstearamide. Soft vinyl chloride $6 (I
I)? Got the film.

Example 4 Extrusion fi7 (40φm theory) using the same device shown in Figure 1
Linear low density polyethylene (density (1,925H/C-
3, melt index 3, 5 w710 m1n)
A soft vinyl chloride resin film having a fine uneven pattern was obtained in the same manner as in Example 1.

[Brief explanation of drawings]

FIG. 1 schematically shows an example of an apparatus for carrying out the method for producing a soft vinyl chloride resin film of the present invention.・
...〃Idroll 9... Winding device 10.11...
hopper

Claims (1)

[Claims] 1. A soft vinyl chloride resin composition containing 40 parts by weight or more of a plasticizer per 100 parts by weight of a vinyl chloride resin is coated on both or one side with another thermoplastic resin with weak interlayer adhesion. 1. A method for producing a soft vinyl chloride resin film having a fine textured pattern on its surface and having a good feel, the method comprising forming the film into a laminated film in the shape of a laminate, and then peeling the layers. 2. The method for producing a flexible vinyl chloride resin film according to claim 1, wherein the laminated film is formed by a coextrusion method. 3. The degree of polymerization of the soft vinyl chloride resin is 1000 to 250
3. The method for producing a soft vinyl chloride resin film according to claim 1 or 2, wherein the polyvinyl chloride resin film is 0. 4. The soft vinyl chloride resin film according to claim 1 or 2, wherein the soft vinyl chloride resin composition and the other thermoplastic resin having weak interlayer adhesion are low density polyethylene or linear low density polyethylene. Production method.