JPS6137418A - Thermoplastic polyetherether ketone film with lubricity - Google Patents

Abstract

PURPOSE:To make it possible to obtain a thermoplastic polyetherether ketone film good in lubricity, by mixing 100pts.wt. thermoplastic polyetherether ketone with 0.01-10pts.wt. inorganic filler, and making the resulting composition into a biaxially oriented film. CONSTITUTION:A thermoplastic polyetherether ketone resin composition that is prepared by blending 100pts. wt. thermoplastic polyetherether ketone with 0.01- 10pts.wt. inorganic filler is made into a biaxially oriented film with lubricity and substantially made of the thermoplastic polyetherether ketone. The amount of the inorganic filler in the resin composition should be 0.01-10pts.wt., preferably 0.02-5pts.wt. to 100pts.wt. thermoplastic polyetherether ketone, and if the amount is less than 0.01pt.wt. the lubricity is unsatisfactory and if the amount exceeds 10pts.wt. the transparency decreases. The method of adding the inorganic filler may be the dry blending process, or other process using mixing machines such as a mixer, extruder, etc.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a biaxially oriented slip film formed from a thermoplastic polyetheretherketone resin composition containing an inorganic filler and a thermoplastic polyetheretherketone. This invention relates to a thermoplastic polyetheretherketone film with good elasticity.

[Prior art]

Thermoplastic polyetheretherketone resin has extremely high heat resistance and is being used in many fields as a resin with excellent properties such as mechanical strength, flame retardance, and chemical resistance. As a result of intensive studies to obtain an industrial high-performance film that greatly exceeds polyethylene terephthalate film from this skin oil, which can also be melt-formed, the inventor found that a thermoplastic polyetheretherketone with a specific amount of inorganic filler was developed. By forming a film of a polyether ether ketone resin composition and subjecting it to biaxial orientation, the inventors discovered that a thermoplastic polyether ether ketone film with excellent lubricity, heat resistance, and various other properties could be obtained, and the present invention was achieved. .

[Description of invention]

That is, the present invention provides thermoplastic polyetheretherketone 10
0J! 0.01 to 10 parts of inorganic filler: ti(:
The present invention relates to a slippery film substantially consisting of thermoplastic polyetheretherketone, which is formed from a thermal TJT plastic polyetheretherketone resin composition blended with the present invention and biaxially oriented.

The thermoplastic polyether and terketole in the present invention comprises a host unit alone or together with other constituent units, such as the following constituent units.

A in the middle is a direct bond, -), -5-1-SO2-1-CO-
Or a divalent hydrocarbon group. ) Resins such as polyarylene polyether polysulfone, polyarylate, polyester, polycarbonate, and polyamide may be blended for the purpose of improving fluidity.

On the other hand, as the inorganic filler, one or more of talc, silica, kaolin, calcined kaolin, mica, aerosil, thyroid, calcium carbonate, potassium titanate fiber, etc. can be appropriately selected and used. Preferably, the particle size is fine.

The film forming method is a melt film forming method in which the polymer is formed into a film by pressing, die extrusion, etc., and then rapidly cooled to produce a non-quality film. This is around the glass transition temperature of the polymer at 150°C.
Stretched at 'C to 210'C with a roll or tenter, simultaneously or sequentially, biaxially to an area magnification of 3 times or more, preferably 7 times or more, and further under tension at 200°C to 330°C, preferably 250°C. Heat set at ~310°C for sufficient time.

It has been found that the film thus obtained not only has excellent heat resistance and sacrificial mechanical strength, but also has a small coefficient of friction and good lubricity.

The content of the inorganic filler in the thermoplastic polyetheretherketone resin composition used in the thermoplastic polyetheretherketone film of the present invention is 0.01 to 10 parts by weight per 10-0 parts by weight of the thermoplastic polyetheretherketone.
Parts by weight, preferably 0.02 to 5 parts by weight, 0.0
If it is less than 1 part by weight, the lubricity will be insufficient, and if it exceeds 10 parts by weight, transparency will decrease.

The inorganic filler can be added by the triblend method or by using a mixing machine such as a mixer or an extruder. Note that the inorganic filler may be surface-treated with a coupling agent or the like.

Furthermore, the composition of the present invention may contain lubricants, heat stabilizers, weather stabilizers, pigments, dyes, etc., depending on the purpose.

〔Effect of the invention〕

The film of the present invention is suitable for fields related to secret machinery, such as magnetic recording media such as audio recording and recording tapes, and photographic films.

〔Example〕

Example 1 Aerosil (Aerosil 200, manufactured by Nippon Aerosil@) and talc (MST, manufactured by Takehara Chemical Co., Ltd.) were added as inorganic fillers to thermoplastic polyetheretherketone (Polyetheretherketone manufactured by ICI Corporation: y 451 GV). They were mixed at the ratio shown in 1, and after blending, they were granulated using an extruder to produce chips.

These polymers were cast onto a water-cooled casting roll to obtain an unstretched film of 400 μm, which was then stretched 3 times in the machine direction at 160°C using a roll, and further stretched 3 times in the transverse direction at 180°C using a tenter-type drawing machine. The film was stretched twice and heat-set at about 280° C. for 30 seconds using a tension heater to obtain a 30 μm film. The lubricity and transparency (haze) of these films were examined. The results are shown in Table-1.

Table-1

Claims (1)

[Claims] An easily slippery thermoplastic polyetheretherketone film prepared by forming a composition containing 100 parts by weight of thermoplastic polyetheretherketone and 0.01 to 10 parts by weight of an inorganic filler and biaxially oriented the film.