JP2002294043A - Resin for sheet and resin sheet using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain both an amorphous polyester resin which can be subjected to calender processing, has a hardness to be freely adjusted by the amount of additive added and an excellent elongation at a low temperature and a resin sheet using the same. SOLUTION: The amorphous polyester resin is mixed with a polymer or a polyether comprising a glycol as a constitutent unit or a glycerol fatty acid ester.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a sheet resin and a resin sheet using the same.

[0002]

2. Description of the Related Art In recent years, vinyl chloride resins (P
VC), there has been a demand for a resin. Therefore, as an alternative to hard vinyl chloride, for example, polyethylene terephthalate (PET), polystyrene (PS), etc., and as an alternative to soft vinyl chloride, polypropylene (P)
P), polyethylene (PE), ethylene vinyl acetate (EVA), ethylene methacrylate (EMA),
Ethylene methyl methacrylate (EMMA) and the like and blends thereof have been proposed.

[0003]

However, in the case of the conventional vinyl chloride resin substitute, the hardness of the resin is determined by the resin, and it is difficult for a sheet maker to process the resin such as a calender and an extrusion to change the hardness. . In the case of performing secondary processing such as high-frequency welding, printing and bonding, pretreatment such as corona treatment and primer treatment is often required.

[0004] The present invention has a behavior or properties similar to soft or semi-rigid vinyl chloride resin, can be calendered, can freely adjust the hardness by the amount of additives, and
It is an object of the present invention to provide a sheet resin having good elongation at a low temperature (for example, 23 ° C. to 40 ° C.) and a sheet made of the resin.

[0005]

Means for Solving the Problems The present inventors are able to process printing, welding, etc. by adding a polymer containing glycol as a structural unit or a fatty acid ester of polyether or glycerin to an amorphous polyester resin. It has been found that a resin suitable for a soft or semi-rigid sheet can be obtained while making use of the properties of the amorphous polyester resin, and that the hardness can be adjusted by changing the amount of addition, and the present invention has been accomplished.

The sheet resin of the present invention is characterized by adding a polymer having glycol as a structural unit or a fatty acid ester of polyether or glycerin to an amorphous polyester resin. Here, the sheet refers to a soft or semi-rigid sheet, and the sheet includes a film.

Further, the resin sheet of the present invention is characterized by comprising an amorphous polyester resin to which a polymer having glycol as a constitutional unit or a fatty acid ester of polyether or glycerin is added.

Amorphous polyester resins include adipic acid,
A resin obtained by polycondensing a dicarboxylic acid such as terephthalic acid or isophthalic acid with ethylene glycol and a diol such as 1,4-cyclohexanediol, 1,3-propanediol or 1,4-butanediol. is there. From the viewpoint of calendering, those having more 1,4-cyclohexanediol residues than ethylene glycol residues are preferred.

The glycol includes ethylene glycol and propylene glycol. Examples of the polymer include polyethylene glycol and polypropylene glycol, and examples of the polyether include polyethylene glycol monomethyl ether and polyethylene glycol dimethyl ether. The number average molecular weight of the polymer or polyether is preferably from 300 to 20,000.

Examples of the fatty acid ester of glycerin include glycerin diacetmonolaurate and glycerin diacetolate.

The amount of the additive, a polymer having glycol as a constitutional unit, or a fatty acid ester of polyether or glycerin, is determined by the amount of the amorphous polyester resin
5 to 30 parts per part is preferred. If the addition amount is less than 5 parts, the softening effect cannot be obtained, and if it exceeds 30 parts, the melt viscosity becomes too low, so that sheeting becomes difficult, and even if a sheet is formed, the additive easily blows out to the surface.

[0013] If necessary, a lubricant such as polyethylene wax may be added.

In order to form a sheet, the sheet is melted by a Banbury kneading machine, and then, for example, to a thickness of 80 to 80 by a calender.
Made on a 0 μm sheet.

[0014]

【Example】

<Examples 1 and 2> Amorphous polyester resin (Eastman Chemical Japan Co., Ltd. East
ar PET-G 6763), 100 parts of polyethylene glycol dimethyl ether (molecular weight: 500) and a lubricant were added at the ratios shown in Table 1, and the mixture was melted by a Banbury kneader to obtain a sheet having a thickness of 200 μm by a calender. In addition, polyethylene wax was used as a lubricant.

[0016]

[Table 1]

<Examples 3 and 4> Glycerin diacetmonolaurate and a lubricant (same as in Examples 1 and 2) were added to 100 parts of an amorphous polyester resin (same as in Examples 1 and 2).
And melted with a Banbury kneader to obtain a 200 μm thick sheet with a calender.

[0018]

[Table 2]

<Comparative Examples 1-3> Polyethylene glycol dimethyl ether (molecular weight 500) and a lubricant (same as Examples 1 and 2) were added to 100 parts of an amorphous polyester resin (same as Examples 1 and 2) as shown in Table 3. And melted with a Banbury kneader, and then calendered to a thickness of 2
A sheet of 00 μm was produced.

[0020]

[Table 3]

Comparative Examples 4 and 5 Glycerin diacetmonolaurate and a lubricant (same as in Examples 1 and 2) were added to 100 parts of an amorphous polyester resin (same as in Examples 1 and 2).
And melted with a Banbury kneader to prepare a 200 μm thick sheet with a calender.

[0022]

[Table 4]

<Comparative Examples 6 to 9> A reinforcing agent (MBS), DOP (diethylhexyl phthalate) and a stabilizer were added to a vinyl chloride resin (PVC) having a degree of polymerization of 1100 at a ratio as shown in Table 5, and mixed with Banbury. The mixture was melted by a kneader, and a sheet having a thickness of 200 μm was obtained by a calender. In addition,
Methyl methacrylate, butadiene,
A reinforcing agent formed from a styrene-acrylate copolymer was used, and a Ba-Zn stabilizer was used as a stabilizer.

[0024]

[Table 5]

Examples 1-4 and Comparative Examples 1, 2, 4, 6-
Each of the sheets obtained in Step 9 was longitudinally (tensile direction) 80 mm, width 1
Using a sample extracted at 0 mm, the tensile strength (MP) was measured at 23 ° C. and 40 ° C. under the condition of a tensile speed of 200 m / min.
a) and elongation (%) were measured. Table 6 shows the results. In Table 6, * means that sheeting could not be performed.

[0026]

[Table 6]

A comparison of Examples 1 and 2 and Examples 3 and 4 in Table 6 shows that the tensile strength and elongation are different between each. Thus, it can be said that the hardness of the sheet can be changed by the amount of the additive. It can also be seen that the sheets of Examples 1 to 4 exhibit the same softening behavior as the vinyl chloride resin sheets of Comparative Examples 6 to 9. Comparative Examples 1, 2 and 4
No sheet showed a softening behavior. In Comparative Examples 3 and 5, the sheet was too soft to be sheeted.

Using the sheet of Example 1, high-frequency welding and gravure printing tests were performed, and good processing was possible. This indicates that the resin sheet of the present invention enables softening while retaining the properties of the amorphous polyester resin, and has a behavior or property similar to that of the vinyl chloride resin sheet.

[0029]

The resin for a sheet and the resin sheet of the present invention have behavior and properties similar to those of the vinyl chloride resin and the sheet, and are easy to handle similarly to the vinyl chloride resin. In addition, the sheet can be processed into a sheet by calendering, the hardness can be freely adjusted by changing the amount of the additive, and the resin sheet has good elongation even at a low temperature (23 ° C to 40 ° C). It is also excellent in secondary workability, such as processing such as

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) C08L 101/06 C08L 101/06 F term (reference) 4F071 AA43 AA46 AA51 AA89 AC10 AE04 AF21 AF53 BA01 BB04 BC01 4J002 CF03W CF04W CF05W CF06W CF07W CF101 CH02X CH05X EH046 EH056 FD02X FD026

Claims (8)

[Claims] 1. A sheet resin obtained by adding a polymer containing glycol as a structural unit or a polyether or a fatty acid ester of glycerin to an amorphous polyester resin. 2. The sheet resin according to claim 1, wherein the polymer is polyethylene glycol or polypropylene glycol. 3. The resin for a sheet according to claim 1, wherein the polyether is polyethylene glycol monomethyl ether or polyethylene glycol dimethyl ether. 4. The resin for a sheet according to claim 1, wherein the fatty acid ester of glycerin is glycerin diacetmonolaurate or glycerin diacetolate. 5. A resin sheet comprising an amorphous polyester resin to which a polymer having glycol as a structural unit or a fatty acid ester of polyether or glycerin is added. 6. The resin sheet according to claim 5, wherein the polymer is polyethylene glycol or polypropylene glycol. 7. The resin sheet according to claim 5, wherein the polyether is polyethylene glycol monomethyl ether or polyethylene glycol dimethyl ether. 8. The resin sheet according to claim 5, wherein the fatty acid ester of glycerin is glycerin diacet monolaurate or glycerin diacetolate.