JP2009108214A - Resin composition for calendering and resin film using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin composition for calendering having excellent formability and capable of yielding a resin film having sufficient hardness and transparency, and a resin film using the same. <P>SOLUTION: The resin composition for calendering comprises: an amorphous polyester composition (A) consisting of 25-75 mass% of a first amorphous polyester (a1) having a melt viscosity at 175°C in a range of 6,000-25,000 mPa s and an elongation at rupture of ≤5%, and 75-25 mass% of a second amorphous polyester (a2) having a melt viscosity at 175°C in a range of 35,000-85,000 mPa s and an elongation at rupture of ≤5%; a flexible polyester (B) having a melt viscosity at 175°C in a range of 5,000-40,000 mPa s and an elongation at rupture of ≥300%; an aliphatic aromatic polyester (C) which is a copolymer of terephthalic acid, 1,4-butanediol and adipic acid; and a lubricant (D), wherein a (A) to (B) mass ratio [mass of (A)/mass of (B)] is in a range of 40/60 to 90/10, and based on 100 parts by mass, in total, of (A) and (B), a content of (C) is in a range of 3-15 parts by mass and a content of (D) is in a range of 0.1-4 parts by mass. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a resin composition for calendering and a resin film using the same.

  Polyester resin films (or sheets) are being used instead of polyvinyl chloride films in applications such as packaging materials for foods and pharmaceuticals, and sheets for lamination in buildings, home appliances, and the like. Conventionally, polyester resin films used for such applications are generally formed by an extrusion molding method or an injection molding method. However, these molding methods have a problem of inferior production efficiency. Therefore, in place of these forming methods, it has been studied to use a calendering method which is generally used as a film forming method for polyvinyl chloride or the like. Such a calendering method is a method in which a molten resin is rolled with a heated metal roll and formed into a film having a desired thickness, and is suitable for forming a continuous film, and is an excellent method in terms of productivity. is there. And when employ | adopting such a calendering method, the amorphous polyester which is excellent in workability rather than normal polyester was used as a material.

  However, when an amorphous polyester is used alone as a resin component, it is difficult to adjust the hardness, unlike polyvinyl chloride, which can be adjusted by adding a plasticizer, making it suitable for applications such as stickers. It was difficult to obtain a semi-rigid film. In addition, a film formed using an amorphous polyester alone as a resin component has a problem that the heat blocking property is insufficient and the elongation is remarkably lowered with time.

  In order to solve these problems, for example, in Japanese Patent Application Laid-Open No. 2004-238534 (Patent Document 1), an olefin wax, a fatty acid ester, A non-crystalline polyester resin composition comprising 0.1 to 4 parts by mass of a lubricant containing a calcium salt of a fatty acid ester, wherein the compounding amount of the olefin wax is 0.01 to 1 part by mass The amount of the fatty acid ester is 0.01 to 0.5 parts by mass, and the amount of the calcium salt of the fatty acid ester is 0.01 to 2.5 parts by mass. Is disclosed. JP-A-2005-298660 (Patent Document 2) discloses a resin composition containing a resin component comprising an amorphous polyester, an aliphatic aromatic polyester resin, and an acrylic resin. A resin composition for a film is disclosed in which the aliphatic aromatic polyester resin is a copolymer of terephthalic acid, 1,4-butanediol and adipic acid.

However, resin compositions such as those described in the above patent documents are not always sufficient in terms of molding processability in calendering, and resin films obtained using such resin compositions have hardness and It was still not enough in terms of transparency.
JP 2004-238534 A JP 2005-298660 A

  The present invention has been made in view of the above-described problems of the prior art, and it is possible to obtain a resin film having sufficient hardness and transparency, and has an excellent molding processability. An object is to provide a product and a resin film using the product.

  As a result of intensive studies to achieve the above object, the present inventors have found that an amorphous polyester composition (A) comprising a combination of specific amorphous polyesters, a soft polyester (B), and an aliphatic fragrance. According to the resin composition containing the group polyester (C) and the lubricant (D) in specific ratios, excellent moldability in calendering can be achieved, and sufficient hardness and The inventors have found that it is possible to obtain a resin film having transparency, and have completed the present invention.

That is, the calendering resin composition of the present invention has a first amorphous polyester (a1) having a melt viscosity at a temperature of 175 ° C. in the range of 6000 to 25000 mPa · s and an elongation at break of 5% or less. ) The second non-crystalline polyester (a2) having a melt viscosity at 25 to 75% by mass and a temperature of 175 ° C. within a range of 35000 to 85000 mPa · s and an elongation at break of 5% or less is 75 to 25% by mass. An amorphous polyester composition (A) comprising: a soft polyester (B) having a melt viscosity at a temperature of 175 ° C. within a range of 5000 to 40000 mPa · s and an elongation at break of 300% or more; and terephthalic acid , An aliphatic aromatic polyester (C) that is a copolymer of 1,4-butanediol and adipic acid, and a lubricant (D). Cage,
The mass ratio of the amorphous polyester composition (A) and the soft polyester (B) [the mass of the amorphous polyester composition (A) / the mass of the soft polyester (B)] is 40/60 to 90 / The content of the aliphatic aromatic polyester (C) is 3 to 15 with respect to 100 parts by mass of the total amount of the amorphous polyester composition (A) and the soft polyester (B). It exists in the range of a mass part, Content of the said lubricant (D) exists in the range of 0.1-4 mass part, It is characterized by the above-mentioned.

  Moreover, in the resin composition for calendar processing of this invention, the said non-crystalline polyester composition (A) is 33-50 mass% of said 1st non-crystalline polyester (a1), and said 2nd non-crystal. It is preferable that it consists of 67 to 50 mass% of conductive polyester (a2).

  Further, in the calendering resin composition of the present invention, the mass ratio of the non-crystalline polyester composition (A) to the soft polyester (B) [the mass of the non-crystalline polyester composition (A) / soft polyester] The mass of (B)] is preferably in the range of 50/50 to 90/10.

  In the calendering resin composition of the present invention, the content of the aliphatic aromatic polyester (C) is 100 mass of the total amount of the amorphous polyester composition (A) and the soft polyester (B). It is preferable that it exists in the range of 3-10 mass parts with respect to a part.

  The resin film of the present invention is obtained by calendering the resin composition.

  In this specification, “film” includes a sheet and a film. “Calendar processing” refers to, for example, kneading the resin composition with a calendering machine and processing it into a film or sheet.

  According to the present invention, it is possible to obtain a resin film having sufficient hardness and transparency, and to provide a calendering resin composition having excellent molding processability, and a resin film using the same. Is possible.

  Hereinafter, the present invention will be described in detail with reference to preferred embodiments thereof.

First, the calendering resin composition of the present invention will be described. That is, the calendering resin composition of the present invention has a first amorphous polyester (a1) having a melt viscosity at a temperature of 175 ° C. in the range of 6000 to 25000 mPa · s and an elongation at break of 5% or less. ) The second non-crystalline polyester (a2) having a melt viscosity at 25 to 75% by mass and a temperature of 175 ° C. within a range of 35000 to 85000 mPa · s and an elongation at break of 5% or less is 75 to 25% by mass. An amorphous polyester composition (A) comprising: a soft polyester (B) having a melt viscosity at a temperature of 175 ° C. within a range of 5000 to 40000 mPa · s and an elongation at break of 300% or more; and terephthalic acid , An aliphatic aromatic polyester (C) that is a copolymer of 1,4-butanediol and adipic acid, and a lubricant (D). Cage,
The mass ratio of the amorphous polyester composition (A) and the soft polyester (B) [the mass of the amorphous polyester composition (A) / the mass of the soft polyester (B)] is 40/60 to 90 / The content of the aliphatic aromatic polyester (C) is 3 to 15 with respect to 100 parts by mass of the total amount of the amorphous polyester composition (A) and the soft polyester (B). It exists in the range of a mass part, Content of the said lubricant (D) exists in the range of 0.1-4 mass part, It is characterized by the above-mentioned.

  The non-crystalline polyester composition (A) according to the present invention comprises a first non-crystalline polyester (a1) and a second non-crystalline polyester (a2) described below. The first non-crystalline polyester (a1) according to the present invention is non-crystalline having a melt viscosity at a temperature of 175 ° C. in the range of 6000 to 25000 mPa · s and an elongation at break of 5% or less. This means polyester. The second non-crystalline polyester (a2) according to the present invention is non-crystalline having a melt viscosity at a temperature of 175 ° C. in the range of 35,000 to 85000 mPa · s and an elongation at break of 5% or less. This means polyester. And as such non-crystalline polyester, for example, a diol composed of a dicarboxylic acid component consisting of 100 mol% of terephthalic acid, 60-80 mol% of ethylene glycol and 40-20 mol% of 1,4 cyclohexanedimethanol And a copolymer with the component. In the present specification, the melt viscosity is a flow tester (manufactured by SHIMADZU, product name “FLOWTESTER”) obtained by melting the sample resin at a predetermined temperature according to a method described in JIS K-7210. It means the value measured by “CFT-100”). In this specification, the elongation at break is a sample film made of only a specific polyester, and the elongation at break of the sample film is measured by a method based on the method described in JIS K-7161. It means the value that was made. That is, using only a specific polyester as a material, a sample film having a predetermined thickness and size (thickness: 0.1 mm, width: 20 mm, length: 150 mm) is prepared, and the elongation at break of the sample film is determined by a tensile test. It means a value measured using a machine under the condition of a tensile speed of 300 mm / min.

  Moreover, as said 1st non-crystalline polyester (a1), what is marketed can be used, for example, "CADENCE GS-2" by Eastman Chemical Company, "FN305" by Toyobo Co., Ltd. Can be mentioned. Further, as the second non-crystalline polyester (a2), commercially available ones can be used. For example, “CADENCE GS-3” manufactured by Eastman Chemical Co., Ltd., “FN305BX-14” manufactured by Toyobo Co., Ltd. ".

  In the non-crystalline polyester composition (A) according to the present invention, the mass ratio of the first non-crystalline polyester (a1) and the second non-crystalline polyester (a2) [the first non-crystalline polyester]. The mass of the polyester (a1) / the mass of the second amorphous polyester (a2)] needs to be in the range of 25/75 to 75/25. If the mass ratio is less than 25/75, the melt viscosity is too high, so that the molding processability in the calendering of the resulting resin composition is poor. On the other hand, if it exceeds 75/25, the melt tension becomes low. Molding workability in calendering of the obtained resin composition is deteriorated. In addition, from the viewpoint of the balance between molding processability in the calendering of the obtained resin composition and the hardness and transparency of the obtained resin film, the first non-crystalline polyester (a1) and the second non-crystalline property. The mass ratio with respect to the polyester (a2) [the mass of the first amorphous polyester (a1) / the mass of the second amorphous polyester (a2)] is in the range of 33/67 to 50/50. Is preferred.

  The soft polyester (B) according to the present invention refers to a polyester having a melt viscosity in the range of 5000 to 40000 mPa · s at a temperature of 175 ° C. and an elongation at break of 300% or more. Examples of such soft polyester (B) include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, naphthalene-1,4-dicarboxylic acid, naphthalene-2,6-dicarboxylic acid, and ester-forming derivatives thereof. And a diol component containing ethylene glycol as a main component and containing 60 mol% or more (preferably 70 mol% or more) of ethylene glycol in all diol components. A copolymer is mentioned. Furthermore, as such a soft polyester (B), a commercially available one can be used, and examples thereof include “FLX-92” manufactured by Bell Polyester Products.

  In the calendering resin composition of the present invention, the mass ratio of the non-crystalline polyester composition (A) to the soft polyester (B) [the mass of the non-crystalline polyester composition (A) / soft polyester (B ))] Must be in the range of 40/60 to 90/10. If the mass ratio is less than 40/60, the adhesiveness to the roll becomes excessive, so that the molding processability of the resulting resin composition in calendering deteriorates. On the other hand, if it exceeds 90/10, the resulting resin composition is obtained. The moldability in the calendering process becomes worse and the hardness of the resulting resin film becomes insufficient. Moreover, from the viewpoint of the balance between the moldability in the calendering of the obtained resin composition and the hardness and transparency of the obtained resin film, the amorphous polyester composition (A) and the soft polyester (B) The mass ratio [mass of amorphous polyester composition (A) / mass of soft polyester (B)] is preferably in the range of 50/50 to 90/10, and in the range of 60/40 to 80/20. More preferably, it is within.

  The aliphatic aromatic polyester (C) according to the present invention is polybutylene adipate terephthalate (PBAT) which is a copolymer composed of terephthalic acid, 1,4-butanediol and adipic acid. Further, such aliphatic aromatic polyester (C) is a diol composed of a dicarboxylic acid component consisting of 50 to 60 mol% terephthalic acid and 50 to 40 mol% adipic acid and 100 mol% 1,4-butanediol. A copolymer with the component is preferable. Further, as the aliphatic aromatic polyester (C), commercially available ones can be used, and examples thereof include “ECOFLEX” manufactured by BASF Japan and “Easter Bio” manufactured by Eastman Chemical. It is done.

  Moreover, it is preferable that the melt viscosity in the temperature of 175 degreeC of such an aliphatic aromatic polyester (C) exists in the range of 4000-8000. Further, the elongation at break of such aliphatic aromatic polyester (C) is preferably 500% or more.

  Moreover, content of such an aliphatic aromatic polyester (C) is 3-15 mass parts with respect to 100 mass parts of total amounts of the said amorphous polyester composition (A) and the said soft polyester (B). It is necessary to be within the range. If the content is less than 3 parts by mass, the moldability of the resulting resin composition in calendering will be poor, while if it exceeds 15 parts by mass, the resulting resin film will have insufficient transparency. Further, from the viewpoint of balance between molding processability in the calendering of the obtained resin composition and the hardness and transparency of the obtained resin film, the content of the aliphatic aromatic polyester (C) is the non-crystalline polyester. It is preferable that it exists in the range of 3-10 mass parts with respect to 100 mass parts of total amounts of a composition (A) and the said soft polyester (B).

  Examples of the lubricant (D) according to the present invention include olefin waxes, fatty acid esters, and calcium salts of fatty acid esters. These lubricants (D) can be used alone or in combination of two or more.

  Moreover, content of such a lubricant (D) is the range of 0.1-4 mass parts with respect to 100 mass parts of total amounts of the said amorphous polyester composition (A) and the said soft polyester (B). It is necessary to be within. If the content is less than 0.1 part by mass, the slipperiness is insufficient, so that the adhesion to the roll becomes excessive. On the other hand, if the content exceeds 4 parts by mass, the resulting resin film may cause bleeding and transparency inhibition. Become.

  Furthermore, such a lubricant (D) is the said non-crystalline polyester composition (A) from a viewpoint of improving the work moldability in a calendar process, keeping the printability at the time of shape | molding to a resin film favorable. ) And 0.01 to 1 part by weight of the olefin wax, 0.01 to 0.5 part by weight of the fatty acid ester, and calcium of the fatty acid ester with respect to 100 parts by weight of the total amount of the soft polyester (B). It is preferable that the salt contains 0.01 to 2.5 parts by mass.

  Examples of the olefin wax include polyethylene wax, polypropylene wax, and polybutylene wax. From the viewpoint of improving calendar workability such as roll lubricity, the number average molecular weight is 50,000. The following polyolefin waxes are preferable, and polyolefin waxes having a number average molecular weight of 30,000 or less are more preferable. Among these polyolefin waxes, modified polyolefin waxes that contain a carboxylic acid group or a hydroxyl group in the molecule by a method such as oxidation, or that contain an unsaturated group by reacting maleic acid or an epoxy group-containing compound. It is preferable that the acid value by the measuring method described in JIS K-5902 is 10 or more. Use of these olefinic waxes tends to improve roll lubricity during calendar processing. These olefinic waxes can be used alone or in combination of two or more.

  Examples of the fatty acid ester include a synthetic wax made of an ester of a fatty acid and an aliphatic alcohol, or a natural wax. Such fatty acid is preferably a saturated fatty acid having 20 to 30 carbon atoms, and examples thereof include behenic acid, lignoceric acid, serotic acid, heptacosanoic acid, montanic acid, and melicic acid. Among these fatty acids, montanic acid is preferable. By using such a fatty acid, the roll lubricity at the time of calendar processing tends to be improved. Such aliphatic alcohol is preferably an aliphatic saturated alcohol having 2 to 35 carbon atoms, and examples thereof include octyl alcohol, stearyl alcohol, lauryl alcohol, ethylene glycol, and glycerin. Examples of such fatty acid esters comprising fatty acids and fatty alcohols include synthetic waxes such as octyl behenate, stearyl behenate, lauryl behenate, seryl serotic acid, and montanic acid glycol ester; montan wax, carna Examples thereof include natural waxes such as uba wax and beeswax. Among these fatty acid esters, it is preferable to use montanic acid glycol ester and montan wax. By using these fatty acid esters, the kneading operation with the resin tends to be easy. These fatty acid esters can be used alone or in combination of two or more.

  Examples of the calcium salt of the fatty acid ester include salts of the fatty acid ester and calcium. The fatty acid ester and calcium comprising the saturated fatty acid having 20 to 30 carbon atoms and the aliphatic saturated alcohol having 2 to 35 carbon atoms as described above. And a salt thereof. In the present invention, it is particularly preferable to use a calcium salt of montanic acid glycol ester. By using calcium salts of these fatty acid esters, the appearance and various physical properties of the resulting resin film can be improved, and roll lubricity during calendering tends to be improved. These calcium salts of fatty acid esters can be used singly or in combination of two or more.

  As described above, the resin composition for calendering according to the present invention includes the amorphous polyester composition (A), the soft polyester (B), the aliphatic aromatic polyester (C), and the lubricant. And (D) at a predetermined ratio. Such a resin composition not only has excellent molding processability in calendering, but a resin film having sufficient hardness and transparency can be obtained by calendering such a resin composition. .

  In the resin composition for calendering of the present invention, in addition to the components (A) to (D), an antioxidant, a weathering agent, an antistatic agent, a processing aid, silicone oil, and dye are added as necessary. Colorants such as pigments and pigments, fillers such as calcium carbonate, and additives such as flame retardants can be added within a range that does not impair the effects of the present invention. The content of these additives is preferably 30 parts by mass or less with respect to 100 parts by mass of the total amount of the amorphous polyester composition (A) and the soft polyester (B).

  Next, the resin film of the present invention will be described. That is, the resin film of the present invention is obtained by calendering the above-described calendering resin composition of the present invention.

  As such a calendering method, for example, a method of kneading the calendering resin composition using a calendering machine and processing it into a film or sheet can be employed. The calendering resin composition may be mixed in advance with a Henschel mixer or the like and then kneaded and calendered using a calendering machine. Moreover, as a calendar processing machine, what is necessary is just a calendar processing machine provided with two or more metal rolls, and a well-known thing can be used suitably. Furthermore, it is preferable that the roll surface temperature in such a calendar processing machine is in a range of 160 to 190 ° C., for example.

  In addition, the method of using the resin film of the present invention thus obtained is not particularly limited, and the same as conventional polyethylene terephthalate sheets and polyvinyl chloride sheets, and laminated materials such as packaging materials for foods and pharmaceuticals, buildings and household appliances. It can be used as a sheet for a sticker or a sheet for a sticker.

  EXAMPLES Hereinafter, although this invention is demonstrated more concretely based on an Example and a comparative example, this invention is not limited to a following example.

Example 1
“CADENC GS-2” manufactured by Eastman Chemical Co., Ltd. as the first amorphous polyester [melt viscosity at 175 ° C .: 6000 mPa · s, elongation at break (longitudinal / lateral): 3.7% / 3. 2%] as 20 parts by mass, “CADENCE GS-3” manufactured by Eastman Chemical Co. as a second amorphous polyester [melt viscosity at 175 ° C .: 50000 mPa · s, elongation at break (longitudinal / lateral) : 3.7% / 3.2%], 40 parts by mass, “FLX-92” manufactured by Bell Polyester Products as a soft polyester [melt viscosity at 175 ° C .: 5000 mPa · s, elongation at break (longitudinal / lateral) Direction): 504% / 452%], 40 parts by mass, “ECOFLEX” (terephthalic acid, 1 5 parts by weight of a copolymer comprising 4-butanediol and adipic acid, melt viscosity at 175 ° C .: 5000 mPa · s), 0.5 part by weight of polyethylene oxide wax manufactured by ADEKA as a lubricant, montanic acid ethylene glycol ester 0.5 parts by mass of calcium salt and 0.2 parts by mass of montanic acid ethylene glycol ester were blended and melted and kneaded at a temperature of 150 ° C. for 10 minutes with a Banbury mixer to obtain a resin composition for calendering. It was.

  Next, the obtained calendering resin composition was put into a calendering machine and calendered under the condition of a roll surface temperature of 175 ° C. to obtain a resin film having a thickness of 0.1 mm and a width of 1200 mm.

(Example 2)
A resin film was obtained in the same manner as in Example 1 except that the blending amounts of the first amorphous polyester and the second amorphous polyester were 15 parts by mass and 45 parts by mass, respectively.

(Example 3)
A resin film was obtained in the same manner as in Example 1 except that the amount of the aliphatic aromatic polyester was changed to 10 parts by mass.

Example 4
A resin film was obtained in the same manner as in Example 1 except that the blending amounts of the first amorphous polyester, the second amorphous polyester and the soft polyester were 17 parts by mass, 33 parts by mass and 50 parts by mass, respectively. It was.

(Comparative Example 1)
A resin film was obtained in the same manner as in Example 1 except that the aliphatic aromatic polyester was not used.

(Comparative Example 2)
A resin film was obtained in the same manner as in Example 1 except that the blending amounts of the second amorphous polyester and the soft polyester were 60 parts by mass and 40 parts by mass, respectively, without using the first amorphous polyester. It was.

(Comparative Example 3)
A resin film was obtained in the same manner as in Example 1 except that the blending amounts of the first amorphous polyester and the soft polyester were 60 parts by mass and 40 parts by mass, respectively, without using the second amorphous polyester. It was.

(Comparative Example 4)
A resin film was obtained in the same manner as in Example 1 except that the blending amounts of the first amorphous polyester and the second amorphous polyester were 33 parts by mass and 67 parts by mass, respectively, without using the soft polyester. It was.

(Comparative Example 5)
A resin film was obtained in the same manner as in Example 1 except that the blending amounts of the first amorphous polyester, the second amorphous polyester and the soft polyester were 10 parts by mass, 20 parts by mass and 70 parts by mass, respectively. It was.

(Comparative Example 6)
A resin film was obtained in the same manner as in Example 1 except that the amount of the aliphatic aromatic polyester was 20 parts by mass.

(Comparative Example 7)
“CADENC GS-3” manufactured by Eastman Chemical Co., Ltd. [melt viscosity at 175 ° C .: 6000 mPa · s, elongation at break (longitudinal / lateral): 3.7% / 3. 2%] is 80 parts by mass, “GM900” (melting point: 110-120 ° C.) manufactured by Toyobo Co., Ltd. as soft polyester, and “ECOFLEX” (terephthalic acid, 1 manufactured by BASF Japan Ltd.) as aliphatic aromatic polyester. , 4-butanediol and adipic acid copolymer, melt viscosity at 175 ° C .: 5000 mPa · s), 5 parts by mass of polyethylene oxide wax manufactured by Adeka as a lubricant, ethylene glycol montanate 0.5 parts by mass of ester calcium salt and 0.2 parts by mass of montanic acid ethylene glycol ester Were blended and melted and kneaded at a temperature of 150 ° C. for 10 minutes using a Banbury mixer to obtain a resin composition for calendering.

  Next, the obtained calendering resin composition was put into a calendering machine and calendered under the condition of a roll surface temperature of 175 ° C. to obtain a resin film having a thickness of 0.1 mm and a width of 1200 mm.

<Evaluation of workability of resin composition for calendering and hardness and transparency of resin film>
(I) Evaluation Method The processability of the resin composition for calendering and the hardness and transparency of the resin film were evaluated or measured by the following method.

(I) Processability of resin composition for calendering The degree of roll closure when forming a resin film by calendering is evaluated from the viewpoint of ease of adjusting the gap between the rolls, and calendering based on the following criteria The processability of the resin composition for use was determined.
○: Melt viscosity and melt tension are appropriate, and film formation can be performed smoothly.
(Triangle | delta): Since melt viscosity is a little low or a little high, film shaping | molding is a little difficult.
X: Film molding is difficult due to low or high melt viscosity or melt tension.

(Ii) Resin Film Hardness Based on the method described in JIS K-7161, the resin film hardness was evaluated by measuring the tensile stress at 10% strain of the resin film. That is, the resin film was cut into a size having a width of 20 mm and a length of 150 mm to obtain a sample. Then, the tensile stress at 10% strain of the sample was measured using a tensile tester (product name “TENSILON” manufactured by ORIENTEC), and the hardness of the resin film was determined based on the following criteria.
○: Tensile stress at 10% strain is less than 25 MPa.
Δ: Tensile stress at 10% strain is 25 MPa or more and less than 35 MPa.
X: The value of the tensile stress at 10% strain is 35 MPa or more.

(Iii) Transparency of resin film Based on the method described in JIS K-7136, the transparency of the resin film was evaluated by measuring the haze value of the resin film. That is, the haze value of the resin film was measured using a haze computer (product name “HGM-2D” manufactured by Suga Test Instruments Co., Ltd.), and the transparency of the resin film was determined based on the following criteria.
○: Haze value is less than 5.
Δ: Haze value is 5 or more and less than 10.
X: Haze value is 10 or more.

(II) Evaluation results The processability of the calendering resin compositions obtained in Examples 1 to 4 and Comparative Examples 1 to 7, and the hardness and transparency of the resin film obtained using them were evaluated or measured. . The obtained results are shown in Table 2. Moreover, the composition of the resin composition for calendar processes in Examples 1-4 and Comparative Examples 1-7 is put together in Table 1, and is shown.

  As is clear from the results shown in Table 2, the calendering resin compositions (Examples 1 to 4) of the present invention were excellent in calendering properties. Moreover, the resin film obtained by using the resin composition for calendering of the present invention was excellent in hardness and transparency.

  As described above, according to the present invention, it is possible to obtain a resin film having sufficient hardness and transparency, and a resin composition for calendering having excellent molding processability, and the same are used. A resin film can be provided.

Claims (5)

The first amorphous polyester (a1) having a melt viscosity in the range of 6000 to 25000 mPa · s at a temperature of 175 ° C. and an elongation at break of 5% or less, and a melt viscosity at a temperature of 175 ° C. A non-crystalline polyester composition (A) comprising 75 to 25% by mass of the second non-crystalline polyester (a2) having an elongation in the range of 35,000 to 85000 mPa · s and an elongation at break of 5% or less; A soft polyester (B) having a melt viscosity at a temperature of 175 ° C. in the range of 5000 to 40000 mPa · s and an elongation at break of 300% or more, a co-polymer comprising terephthalic acid, 1,4-butanediol and adipic acid Containing an aliphatic aromatic polyester (C) that is a polymer and a lubricant (D),
The mass ratio of the amorphous polyester composition (A) and the soft polyester (B) [the mass of the amorphous polyester composition (A) / the mass of the soft polyester (B)] is 40/60 to 90 / The content of the aliphatic aromatic polyester (C) is 3 to 15 with respect to 100 parts by mass of the total amount of the amorphous polyester composition (A) and the soft polyester (B). A resin composition for calendering, which is in the range of parts by mass, and wherein the content of the lubricant (D) is in the range of 0.1 to 4 parts by mass.   The non-crystalline polyester composition (A) comprises 33 to 50% by mass of the first non-crystalline polyester (a1) and 67 to 50% by mass of the second non-crystalline polyester (a2). The resin composition for calendering according to claim 1, wherein the resin composition is used for calendering.   The mass ratio of the amorphous polyester composition (A) and the soft polyester (B) [the mass of the amorphous polyester composition (A) / the mass of the soft polyester (B)] is 50/50 to 90 / The resin composition for calendering according to claim 1 or 2, wherein the resin composition is within a range of 10.   The content of the aliphatic aromatic polyester (C) is in the range of 3 to 10 parts by mass with respect to 100 parts by mass of the total amount of the amorphous polyester composition (A) and the soft polyester (B). The resin composition for calendering according to any one of claims 1 to 3, wherein the resin composition is used for calendering.   A resin film obtained by calendering the calendering resin composition according to any one of claims 1 to 4.