CN111454564A

CN111454564A - High-temperature-resistant TPU (thermoplastic polyurethane) film and preparation process thereof

Info

Publication number: CN111454564A
Application number: CN202010399480.9A
Authority: CN
Inventors: 王晓松; 刘锦标
Original assignee: Shanghai Xin Gen Eco Technologies Co ltd
Current assignee: Shanghai Xin Gen Eco Technologies Co ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2020-07-28

Abstract

The invention provides a high-temperature-resistant TPU film and a preparation process thereof, wherein the high-temperature-resistant TPU film comprises the following components in parts by weight: 90-100 parts of 90A raw material particles and 5-10 parts of hydroxyl spherical glass bead master batch, wherein the preparation process comprises the following steps: respectively putting the 90A raw material particles and the hydroxyl spherical glass bead master batch in parts by weight into a stirrer and uniformly stirring; putting the uniformly mixed mixture of the 90A raw material particles and the hydroxyl spherical glass bead master batch into a drying dehumidifier for drying and dehumidifying, and taking out after drying and dehumidifying are completed for 2-3 h; putting the dried and dehumidified mixture into a double-screw extruder, plasticizing and extruding the mixture after a period of time, and cutting the mixture after cooling the mixture by cold water to obtain TPU film particles; and drying the obtained TPU film particles, putting the dried TPU film particles into a casting machine, carrying out casting process treatment, and carrying out roll forming by using a cooling roll to obtain the high-temperature-resistant TPU film. The TPU film prepared by the invention can still keep the complete film body shape under the high-temperature use environment of 170-200 ℃.

Description

High-temperature-resistant TPU (thermoplastic polyurethane) film and preparation process thereof

Technical Field

The invention belongs to the technical field of high-temperature-resistant TPU films and preparation processes thereof, and particularly relates to a high-temperature-resistant TPU film and a preparation process thereof.

Background

TPU and thermoplastic TPU elastomer are prepared by extruding and mixing MDI containing NCO functional group and PO L YO L and 1.4BG containing OH functional group, and have good elasticity, good physical property and various mechanical strengths, so the TPU and the thermoplastic TPU elastomer are widely used for processing modes such as injection, extrusion, calendering and dissolution into solution type resin and the like, are plastic materials frequently used by plastic processing manufacturers, and the prepared products cover the range of industrial application and civil necessities.

In recent years, the use of thermoplastic PU elastomers has been increasing continuously due to the continuous development of new products, and new industrial opportunities with low cost and high added value are created for plastic processing manufacturers.

TPU (thermoplastic polyurethanes) is becoming increasingly popular because of its superior properties and environmental protection concept. In places where PVC is used, TPU can become a substitute for PVC, but the TPU has the advantages that PVC is extremely dusty, and the TPU not only has excellent characteristics of high tension, high tensile force, toughness and aging resistance, but also is a mature environment-friendly material. TPUs have been widely used in: shoe materials, ready-made clothes, inflatable toys, aquatic and underwater sports equipment, medical equipment, fitness equipment, automobile seat materials, umbrellas, leather suitcases, leather bags and the like.

The TPU film is prepared by processes of calendering, tape casting, film blowing, coating and the like on the basis of TPU granules, and is widely applied to sports shoes: trademark decorations on the sole and the vamp, an air bag, an air cushion and an oil pocket.

However, the TPU film in the prior art has the condition of not resisting high temperature, and cannot easily maintain the complete mold body shape at high temperature, so a high-temperature TPU film is required.

Disclosure of Invention

In order to solve the technical problems, the invention provides a high-temperature resistant TPU film and a preparation process thereof, wherein the TPU film comprises the following components in parts by weight: 90-100 parts of 90A raw material particles and 5-10 parts of hydroxyl spherical glass bead master batch, wherein the preparation process of the high-temperature-resistant TPU film comprises the following steps:

s1: respectively putting the 90A raw material particles and the hydroxyl spherical glass bead master batch in parts by weight into a stirrer and uniformly stirring;

s2: putting the uniformly mixed mixture of the 90A raw material particles and the hydroxyl spheroid glass bead master batch into a drying dehumidifier for drying and dehumidifying, and taking out the mixture after the drying and dehumidifying are finished;

s3: putting the dried and dehumidified mixture into a double-screw extruder, plasticizing and extruding the mixture after a period of time, and cutting the mixture after cooling the mixture by cold water to obtain TPU film particles;

s4: and drying the obtained TPU film particles, putting the dried TPU film particles into a casting machine, carrying out casting process treatment, and carrying out roll forming by using a cooling roll to obtain the high-temperature-resistant TPU film.

Preferably, the temperature of the drying dehumidifier is 100-110 ℃, and the drying dehumidifier can keep the drying degree of the 90A raw material particles and the hydroxyl spherical glass bead master batch consistent so as to facilitate the subsequent operation.

Preferably, the temperature of the screw in the double-screw extruder is 210-230 ℃.

Preferably, the temperature of the die head in the casting machine is 190-195 ℃.

Preferably, the temperature of the cooling roller during roll forming is 30-35 ℃.

The invention has the beneficial effects that: the molecular chains of the 90A raw material particles and the hydroxyl spherical glass bead master batch are rearranged under the plasticizing temperature condition, so that the short chains are connected in a ring-to-ring buckling mode through the spherical additive, the arrangement of the short chains is supplemented, the molecular arrangement matrix is improved, and the prepared TPU film can still keep the complete film shape under the high-temperature use environment of 170-200 ℃.

Drawings

FIG. 1 is a step diagram of a high temperature resistant TPU film and process for making the same.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention is further described below:

example (b):

as shown in the attached figure 1, the high-temperature resistant TPU film and the preparation process thereof are characterized in that the TPU film comprises the following components in parts by weight: 90-100 parts of 90A raw material particles and 5-10 parts of hydroxyl spherical glass bead master batch, wherein the preparation process of the high-temperature-resistant TPU film comprises the following steps:

(1) respectively putting 90-100 parts of 90A raw material particles and 5-10 parts of hydroxyl spherical glass bead master batch into a stirrer and uniformly stirring;

(2) putting the uniformly mixed mixture of the 90A raw material particles and the hydroxyl spherical glass bead master batches into a drying dehumidifier, drying and dehumidifying at the temperature of 100-110 ℃ to keep the drying degree of the 90A raw material particles and the hydroxyl spherical glass bead master batches consistent, and taking out the mixture after drying and dehumidifying are finished for 2-3 h;

(3) placing the dried and dehumidified mixture into a double-screw extruder, keeping the temperature of a screw in the double-screw extruder at 210-230 ℃, plasticizing and extruding after a period of time, and shearing after cooling by cold water to obtain TPU film particles;

(4) drying the obtained TPU film particles, putting the dried TPU film particles into a casting machine, carrying out casting process treatment at the die head temperature of 190-195 ℃ in the casting machine, and carrying out roll forming by using a cooling roll at the temperature of 30-35 ℃ to obtain the high-temperature-resistant TPU film.

Specifically, the molecular chains of the 90A raw material particles and the hydroxyl spherical glass bead master batch are rearranged under the temperature condition of plasticizing extrusion in a double-screw extruder, so that the short chains are connected in a ring-and-ring buckling mode through spherical additives, the arrangement of the short chains is supplemented, the molecular arrangement matrix is improved, and the prepared TPU film can still keep the complete film body shape under the high-temperature use environment of 170-200 ℃.

Specifically, the overall performance of the prepared high-temperature-resistant TPU film is improved, wherein the Shore hardness is as follows: 90A, specific gravity: 1.22, tensile strength: 50-60Mpa, 300% modulus: 15-20Mpa, elongation break: 1000 + 1100%, abrasion resistance: 20-27mm³Melting point: 180-195.

It should be noted that, in this document, moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The high-temperature-resistant TPU film is characterized by comprising the following components in parts by weight: 90-100 parts of 90A raw material particles and 5-10 parts of hydroxyl spherical glass bead master batch, wherein the preparation process of the high-temperature-resistant TPU film comprises the following steps:

s2: putting the uniformly mixed mixture of the 90A raw material particles and the hydroxyl spherical glass bead master batch into a drying dehumidifier for drying and dehumidifying, and taking out after drying and dehumidifying are completed for 2-3 h;

2. The high temperature resistant TPU film and the preparation process thereof as claimed in claim 1, wherein the temperature of the drying dehumidifier is 100 ℃ and 110 ℃, and the drying dehumidifier can keep the drying degree of the 90A raw material particles and the hydroxyl spheroid glass bead master batch consistent so as to facilitate the subsequent operation.

3. The high temperature resistant TPU film and the preparation process thereof as claimed in claim 1, wherein the temperature of the screw in the twin-screw extruder is 210-230 ℃.

4. The high temperature resistant TPU film and the process for preparing the same as claimed in claim 1, wherein the temperature of the die head in the casting machine is 190 ℃ and 195 ℃.

5. The high temperature resistant TPU film and the process for preparing the same as claimed in claim 1, wherein the temperature of the chill roll during roll forming is 30-35 ℃.