JPS5945120A - Method and apparatus for manufacturing high glossy, transparent film - Google Patents

Abstract

PURPOSE:To obtain a film having characteristics close to physical properties of a casting film which has high transparence and high gloss by a method wherein the blocking strength at the inner surface of a flattened film has a value not less than a given value, and rolling is performed at a temperature lower than the melting poit or softening point of thermoplastic synthetic resin. CONSTITUTION:A bubble 6 extruded out of a die lip 2 of an annular die 1 is inflated to a given width under the inner pressure of air fed through an air blowing inlet 3, cooled by a cooling ring 5 thermally insulated from the annular die 1 through an insulator 4, as desired, and then integrally flattened by a pair of nip rolls 7. Next, after the film thus integrally flattened is rolled using rolling rolls 8, it passes a guide roll 9, undergoes annealing, as required, and is then taken up as a transparent film 10 of product. In this process, it is essential to bring the inner surface of the integrally flattened film into a blocking state exhibiting the blocking strength of at least 500g/2cm width. In the event the blocking strength is less than 500g/2cm width, the film will not come into a complete single film in the subsequent rolling processing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a thermally mobile compound lA2 in an inflation method.
+ i + fat 8 light); production of transparent film); 5 method and manufacturing equipment. More specifically, after extruding the bubble from an annular gun and engraving it to a predetermined width using one of the bubbles, the bubble is flattened and integrated with a pair of nip rolls. The blocking strength of the inner surface of the film is at least 500! Production of a high-gloss transparent film characterized by rolling the thermoplastic synthetic resin to a width of /2ciT1 at a temperature r:11- or lower than the melting point: 4- or softening point. 1-) relates to manufacturing equipment.

Since then, there are a wide variety of thermoplastic synthetic 1ff4 resin films that have been used for a wide range of purposes, depending on the application. There are many objects/eyes.

1st Distribution - Film 11 requested in the film pile Jμ
14 years old 1! It goes without saying that the selection of the material and the method of forming the film are important in order to achieve this.

1 material) F τ constant (gotsai rl, L name hf' ll-
1i'l'i I4\'s (flat angle Mi / I~, so-called several types of silk 7) In addition, J-ru mixing and multi-layering are tested.

On the other hand, regarding the molding method of fill l\-C is the details 1-1
(Apart from Ni, 4 are generally classified into the following J, -).

However, when forming a film from a melt, v8 and 1°-
(t; 1., ? 1> The -1.I-bubble fill ls (bubble) extruded from the Ii-shaped goo is engraved by internal pressure, cooled with air C' from the outside, flattened, and taken off. Inflation method, (r) non-endo ((T die) to J offer and flat plate 1 no. Take Gitnos Ain 勺 (-"
There are other methods such as the die method, the J method, the calendar method, and the casting method, but the former method, /Jv, is generally used.

The above three methods (1) and (2) can be used for one time, τ1
and the former ('1) inso 1 no see 1 n person 1
．． 1. Equipment is relatively inexpensive, film formation is easy, and a wide variety of
1 method (1 method, 4 pairs) 1L"C can be cut, but the resulting product has certain characteristics such as transparency 5-111., gloss t'l, thickness distribution accuracy, etc.
is generally inferior.

On the other hand, the latter (2) casting method requires expensive equipment.
゛Yes, l! 81 membrane also requires a certain level of skill and skill to obtain a stable and homogeneous product. However, 19 products generally have good homogeneity, transparency, and light i1'i!
The uniformity of fl and wall thickness (,-1) is significantly superior to the former (1).

Polyolefin resin films, which are the most widely used among thermoplastic TR+ synthetic resins, have a dynamic point in optical properties such as transparency and gloss of the inflation film, and the high temperature is greatly affected by the cooling method. Crystalline high-density poly "The 1"
non, polypropyl non, or (iJ-brene-α-
Olefin copolymers are particularly important.

The inventors of the present invention have made extensive studies to overcome the problems described in Item 11. As a result, the above-mentioned (2)
The present invention has been achieved by discovering a method for producing a film l\ that has high transparency and high gloss comparable to the swing method, and a manufacturing apparatus for the film (a). 1 7117W I-1', 4\Notification of invention fjn, [Ma,
Inno 1. For the non-synthetic method, 1, Roda (made of plastic 1'1 synthetic resin transparent Noil/A) you 1 non-human (", 1'5+1 I'm gay (') extrusion t't, / Go Banol Fuuchi rc L;, -, 1, -) (I'111 After IJk expands to a constant width, the bubble N month -711] -le,
j, ・) T-formed, and the inner surface of the 1[i+'+ T-formed noilum has at least the strength of 1-2-1-!
i 00 (1,'';) CIT width 11 Atagawa plastic IJ1 synthesis (1 fat melting 1'; i: 1, J soft 1
1'', point J, the temperature is very high.
+1ItfIj 112 people (52 (1 ril.

54: The manufacturing apparatus of the present invention and 11, /, i-irits and air blowing) △1-1-containing annular guide, Ta-j's ・
・//11-hole, J>, stone the 11-hole with the top gear
1 n) J, ru heat nl #, +
11:1 synthetic resin transparency, Noil 11 j! , +73i
j, % position (, two (, between the Ni 11-le and the guide 11-le (5-Less A, (both set a pair of f kings 61n-/and c no octopus '1)
．． 'i? ? 2.2 According to the present invention as described above, the ink 1 no.-1 method is published.
1 station i line fee 7, simple 4T molding process] 111 and many scales! It is a film 11 that has characteristics close to those of Kitoswing Filno, which has high transparency +'l and high gloss 1 (1), without reducing its compatibility with the 1-crystalline method.
7. There is a possibility that it will happen.

The thermoplastic resin used in Ki-11mei is high-pressure poly-1-
Breno, medium and low pressure process polycochi 1 non, boria [l pyrene, polybutene-1, poly-4 methyl-benzone-1] 1ij independent copolymerization, 1 but I non-op [1 pi 1 non copolymerization 1
4-[Brenoheki 1? -1 copolymer, ethylene-
i /7 ``jn'13 (polymerization 1, -1-chi1non-4-me-cho Jshi-pen7-1J1.Polymerization f4 (etc.)Nichi-1non-α-olefin IL i7'i7ijii 3L (, J,] Copolymer containing dibutylone as the main component such as Synpo IA, or copolymerization with propylene as a main component and IC or other α-olenoin 1
4 (polyolefin resins such as Borisbu 1 Non-Itoki I
]t, polyvinyl chloride-based) 6 (fat, polyvinyl chloride-based resin)・1Z Lihinyl Al ■〕-ru-based resins, etc., are included, but are limited to Koma,
l″i<T, but this one is actually made of poly-A fin-based resin! It’s very cool, and its cooling effect is especially appealing.
``!: Crystalline resin,!!illλ low 4F method po 1 river ``breno, ゛[・f leno α- to lenoin, It 1 combination, boria [l pyrene,) ゛11 bi1 non α Arefr Polymer copolymer, Poly 1 1 te; Ramie, Toriwa fJ
U '7 Lenve [1 bi 1 non 1 jfp match small, ding f
1 non-butene 1'' polymerized wood, 1-F leno-hexane-1jt polymer, ethylene-71/7-i']z -
, 111Φ 1 tree, [B1 non-4 mef) and pen in-l 1. jll meeting 1 l”F 1 non and 1. suburban prime number 3...12 (V・A1., □ ”7 r n which j
This combination exhibits the effect of firo)-i.
41 ItIll and 1, U Cl melt index (1, strike. Referred to as M l in A) is n, 2-7o
'10 minutes, preferably 0.5-.31, 'i 0
minute, density fj, '7 is Q, 89-・0.9451/cc,
The null 1-unshine is 0.2...80, and the 'J finish (shi+: 0.8~・!3 ri's 1) is 9i and 17.

1. The present invention was developed based on the drawings.
(Irul)(, 1 Although the present invention is limited to the form of these attached drawings, The direction of 1 and 2 people is 1 direction r < r-, at least downward or downward direction. L, /″111
Mm8 Figure C is included, in Figure 1, ILj ring tie, 2 is tie lip, 3 is air inlet, 4 is insulator, F] 1.1 cold 7; It ring, 6 i, 11 bubble, 7 is nitrogen 1-1
8 is the rolling roll, 9 is the 1-1-1 roll, and 10 is the product film. 1° Bubble 6 extruded from the gooey rib 2 of the annular die 1
The cooling ring is insulated from the heat of the piece 11 with the insulator 4. 5, and then the nip of Riku 1' day-rule 7τ and flattened parts are rolled.Then, the flattened rim is rolled [after rolling in Coal 8, the force Y-metal 9 in its entirety, as necessary - C Annie Lymph)
is rolled up as a transparent film 10, and the product and J
Because of Lun...there is.

The present invention (in this case) - flat integrated filter 11
The inner surface of the
”10- Two-nog-strong tg is right-handed. -Ill help you.

The b [-1, 1 ng force is 50041 2c:ml
In the case of wood (!1), it is completely made into one piece by the subsequent white rolling process (J), 91 parts or I), ηノ)1) Mechanical shock causes local or total peeling, and the film's function as a single film is completely impaired (there are two types).

Furthermore, at the peeled location, the unevenness of the peeled inner surface causes significant surface scattering of light, resulting in a significant decrease in opacity +lr (of the film). The -1 value of the above-mentioned hair strength is not particularly limited, but it is preferable that they be completely integrated before rolling.

” - Notes - Method for causing f-locking (,1v[
There is no limit to For example, λ, inflation 1, γ person 1iT d
(, 1 n negative 1, r restrict the air flow rate in the I ring or cool it), I11!, increase the 1 mark of the expanded bubble, (b Rui or IIAε river (in the bubble) It is possible to peel off the surface (by applying a tangent, etc. to improve strength, etc.), but this is the simplest method. [, 1. Using the conventional inno-shrink method - completely cutting off the cooling air from the horn ring] or squeezing the air bubbles into a small area without completely solidifying the bubbles. The molten or semi-molten state is then held and introduced into the nip roll, and according to the one-symbol method, the film discharged from the nip is so integrated that it cannot be peeled off. What was done and what was done
Ru.

More preferably, the pair of nip rolls has a mechanism capable of cooling, and the nip [the surface gloss of the J-roll is 80% or more] and the contact with the molten bubble causes a rapid cooling effect ψ and the roll on the surface of the bubble. The surface transfer effect is developed and rolled! l! Transparency immediately before X, light) R conversion will be further promoted by J. The film thus flattened and integrated is introduced into the next pair of rolling rolls. In this case, when a 4-layer film with high transparency, high gloss, and mechanical orientation equivalent to the above-mentioned Kiresu Ingnoil is provided, the rolling ratio is 1.05 to 1. '5 (preferably rolled in the range of 8. The rolling magnification (thickness before rolling/
If the 1./za) after rolling is less than 1.05 times, the rolling will result in transparency and high W, and the 1song will be small and 1.5j.
When 7°1 is i (1λ), the odor (is transparency, glossiness (1
, 1, Riya Or becomes 11-ru I ■ extension J, Ru-axis h
[1 Xiang effect Song suddenly became obvious? l:, :', I:su,
The resulting film lacks versatility.1. ．． (I'm scared!'
I h': 'I shii).

1 article 11 extension 1! l' Paris of IJ resin! Uoma IJ
I f; Temperature lower than I softening point 1・[What should be done, preferably (.1811 point or softening point J's hand 10℃ to 60℃
It is good to be able to line up within the range of . ] to 1 of the temperature.
] - The roll can be reheated from 911 parts of the flattened film.However, in order to roll it homogeneously (J constant aA f'X), it is necessary to wet the surface of the rolled film. It is preferable to have a mechanism that controls the rolling temperature.
The surface of the rolling 11-roll and the rim may become sticky, and rolling may not be carried out smoothly. Conversely, if the rolling force fα is 1-'c\゛, then []-=Lunil E force is the remainder h
1, equipment such as toughening of rolling rolls etc. 17C
The 1 illi case is Hataku I T. , within the above number range, the rolling temperature is higher [I], the rolling strength is higher, the haze, the glossiness, etc. tend to be better. You should choose the temperature accordingly.

Furthermore, in the present invention, since the surface condition of the rolling []-ru has a great influence on the transparency and gloss of the film, the surface gloss of the rolling [11]-ru is set to 80% by It is preferable to set it as "part". In particular, the present invention imparts mechanical directionality to the resulting film.
When performing 1-call rolling at a low magnification such as 1-1 roll rolling, the surface gloss after the nip roll is increased to improve transparency and gloss, and the gloss on the surface of the fill 11 before 1-1-roll rolling is increased. J: It is possible to maintain the surface smoothness by subsequent roll rolling (d3 and high), smoothness, and transparency f1.
It increases the effect of

[]-The film after rolling is cooled by an appropriate customary method such as air cooling or air cooling, and then wound to form a product. If necessary, heat treatment may be performed before cooling. The present invention is also useful in coextruded multi-fills using multilayer dies. The coextruded multilayer film according to the present invention has a layer structure that is symmetrical on both sides about the central 14-layer.

According to the present invention, it is possible to use the conventional ink amount of 1 no.
'1 has a high transparency comparable to that of the conventional Kise Sting Filno, and 'dV114 is JJ K
> -) II/ /, No. 17, is possible.

The above-mentioned film is widely used in many fields without a general-purpose film such as a packaging film.

Under Js.
, - Based on the q body direction t, 2. However, the present invention is limited to these unless the gist of the invention is omitted. Exam 7'J
The law is as above.

Equipment> Extruder Screw: 5 Onon, Annular Gui: 150nv, Nip roll and rolling roll: 150mm.

Molding conditions> Bu 11-ratio 2.0, folding diameter 300 mm, Firno, thickness 40 tt, take-up): degree 19 m, 'min, extrusion fi? 25KO/hr.

,・Test lJ method-・G [1 ring strength: using Tensilon, test piece 2
Qmm width, gripping interval 5001■, peeling speed 50mm
,/min, 180 degree peeling degree: AST
MD-1003 compliant gloss level: J
IS Z-1741, 45 degree specular gloss fracture strong stone: ASTM D-66
3Y<F= base growth: △S'TM D-66
3 Compliant Examples 1 to 7, Comparative Examples 1 to 3 Melt-in applications 1. On/10 minutes, density 0.92
5(+/cc, melting point 105°C, commercially available 11°C density lα
The above apparatus and molding strip were made using poly[Brene (referred to as 1-1 PE) at a C1 molding temperature of 180°C.
1 (shown in Figure 1): Film forming was carried out by the blow-in 71 nosion method, and then - (8
The film was removed by CVC rolling.

The properties of this film are shown in Table 1, along with the surface glossiness of each roll, rolling ratio, bumping strength, etc.

In addition, I will show the first person the results when using a rolling roll for comparison (Comparative Example 3).

Examples 7-12 and Comparative Examples 4-6 Mel 1-Index 1, 2! ] ,,-'10 minutes,
Density 0,928+],' cc, Melting point 121℃
, -1-direno content: 887%, butene-1 content: 1
2 mol% of 1 tyrene-1 thene-1 comonopolymer resin (hereinafter referred to as
Using one L L, D [three names], molding temperature 1
90°C (Film forming was performed in the same manner as in Example 1.

Next, rolling was performed at 95°C.

The properties of this film are shown in Table 1 along with surface gloss, rolling ratio, blocking strength, etc.

In addition, the results of comparative doji-C rolling without using the roll are shown in Table 1 (Comparative Example 6).

1 Example 13 to 14, Comparative Example 7, Reference Example 1 Null 1 to index 1.5 g/10 min, density 0.89 CI/CC,
Melting point: 167°C, using Taxis In'A'ax 9 (5% Volip 1) Birenjo [poly,! Is the film formed in the same way as in Example 1? )became. Next, rolling was performed at 130°C.

This film property is [-1 layer surface glossiness, rolling magnification,
Not shown in Table 1 along with blocking strength etc.

In addition, for comparison, Table 1 shows the results of rolling without using coal (Comparative Example 6) and using the T-die method (Reference Example 1).

18- The first person 15- It's so small that it's so resinous'fl(
Using a secret poly 1 1 non, I ``Example 10 (Jj iri'' t+b better than comparison example 3: 1, Shii A ri oh, 1- and gloss t'l -0 This tendency (, 1, 1h rolling 111 cases' or 1, (1!
') Oh, J, rF 1 , 5-C real h1! ! Example 3 OJ, Hi 4 ii! There is r. In addition, use 1-mol [-1-ru] and perform 1' arring feed Jjlil before 'C'f>-tou/'11-ru. Comparative Examples 1 to 21j, i01α (1) and gloss [a are inferior.

Example 7 using tamablenonotene-1 copolymer = -12, Comparative Example 4 -6! l? Example 113-1/'1. Company comparison example 7 kI i13iU
Results were obtained for 6 litters, and 1 was positive. In addition, Reference Example 11L-Comparison-C1 Examples 13 to 14 by the 1-tie method using polypropylene homopolymer had the same or higher preference j: 1. ．． It shows a high degree of haze and gloss.

[Brief explanation of the drawing]

Figure 1 shows an example of Ming's H method on a tree. '1 ・I: Abnormality Y, 2... Abnormality f, 3
'I...Empty<2(Blowing [21, /1...Insulation f small, 15
... cold 7; l ring, 6... hazor, 7... nig[1-ru, 8... rolled L1-ru, 9... guide "
1-ru, 10...Product film. ! 14th Edition Applicant: Kuchimoto Ishiura Chemical Co., Ltd. Representative: Attorney Tatsuo Ito Attorney: Tetsuya Ito

Claims (1)

[Claims] 1. J3 is a method for manufacturing a thermoplastic synthetic resin punched knot 18 using an inflation method, in which a bubble extruded from an annular die is expanded to a predetermined width using internal pressure! After that, the bubbles are flattened and integrated using a nip [1-ru], and the blocking strength of the inner surface of the flattened film is adjusted to at least 500 cl/2 CT11 width (2). A method for producing a high-gloss transparent film, characterized in that the film is rolled with a rolling 1-1-roll at a concentration lower than the fi1 point or softening point of .
The production of the high gloss transparent film according to claim 1, carried out in the range C. to 1.5 times. 3. Said nip []-rule and /' or rolling 1-f
- surface light of the film) k' Iσ is at least 80%C; The method for producing a high-gloss transparent film according to any one of Claims 1 and 3, wherein the synthetic resin is a polyolefin resin. 5. The polyolefin resin is a T-blen homopolymer,
Claim 4, which is at least one selected from the group consisting of a copolymer containing 1 ethylene as a main component, a propylene homopolymer, and a polymer containing 1 pyrene as a main component and t=-+. A method for producing a high-gloss transparent film as described in Section 1. 6. The method for producing a high-gloss transparent film according to claim 5, wherein the copolymer containing Brene as a main component is a copolymer of ethylene and an α-olefin having 3 to 12 carbon atoms. 7. The method for producing a high-gloss transparent film according to claim 6, wherein the Edge I non-α-olefin copolymer is a ]-brene-butene-1 copolymer. 8. Tyritz and air blowing [-1 and 4-1'-1.1
Day □・W 1 (a pair of needles, C6, 4. I J- (synthesis of heat 1j 7 plastic-1'1 by the inflation method (transparent film of 61 resin) Equipment up to +IJ [C1] Between the 11-roll and the 1000-wheel [1-roll], a 1-roll is installed between the two rolling mills. -Characteristics
'、? R3 Rokumei - Noirrem's 1st 2j Notice) At the time. 9. From the above nip roll J, ・′,t (J rolling 1
1-L surface light > R degree is low b'809'jo
T'A Riru 1) High gloss j as described in Claim 8
Fabrication of transparent film′) Δ device.