High-toughness and high-tensile-strength TPU film and preparation method thereof

A high tensile strength, high toughness technology, applied in the field of film manufacturing, can solve the problems of limiting the repairability of TPU films, small elongation at break, limited tensile strength, etc., to achieve strong repairability, uniform plasticization, Even thickness effect

Active Publication Date: 2021-06-25
DELSTAR TECH SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current production and use of TPU film, the tensile strength is limited and the elongation at break is small, thus further limiting the repairability of TPU film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The present invention provides a kind of preparation method of high toughness, high tensile strength TPU film on the one hand, comprises the following steps:

[0030] (1) each raw material is carried out premixing and drying treatment, and described raw material comprises TPU masterbatch and toughening agent;

[0031] (2) Push the dried raw material into the spiral sleeve by the motor of the single-screw extruder for melting;

[0032] (3) The molten mixture is molded by a die to obtain an extruded cast film;

[0033] (4) Cool the casting film and adjust the thickness through ceramic rollers and rubber rollers;

[0034] (5) trimming and winding the film obtained in step (4) to obtain the TPU film.

[0035] In some preferred embodiments, the drying temperature in the step (1) is 120-135°F, the drying time is 2-4 hours, and the moisture mass ratio after drying treatment is ≤0.12%.

[0036] In some preferred embodiments, the temperature of the feeding section of the sing...

Embodiment 1

[0061] On the one hand, this embodiment provides a TPU film with high toughness and high tensile strength, including the following raw materials in parts by weight: 90.5 parts of TPU masterbatch, 1.5 parts of EMA 1126AC, 1.5 parts of BTA-751MBS, 1.5 parts of antioxidant 168, and 1.5 parts of antioxidant 10761 parts of agent, 2.5 parts of 2-hydroxy-4-n-octyloxydiphenyl, 2.5 parts of 2-(2-hydroxy-5-benzyl)benzotriazole.

[0062] The first is the preparation of TPU master batches. According to parts by weight, the TPU master batches include the following components: 35 parts of polyether polyols with a hydroxyl value of 330 mgKOH / g, 46 parts of cyclohexane dimethylene diisocyanate, 1, 8.8 parts of 4-butanediol, 0.2 parts of N,N-dimethylcyclohexylamine, and 10 parts of polytetrafluoroethylene.

[0063] (1) Add polyether polyol with a hydroxyl value of 285 mgKOH / g and cyclohexane dimethylene diisocyanate into the container in sequence, and react in vacuum at 80°C for 16 hours at a ...

Embodiment 2

[0078] On the one hand, this embodiment provides a TPU film with high toughness and high tensile strength, including the following raw materials in parts by weight: 87 parts of TPU masterbatch, 2 parts of EMA 1126AC, 2 parts of BTA-751MBS, 1.5 parts of antioxidant 168, and 1.5 parts of antioxidant 1.5 parts of agent 1076, 3 parts of 2-hydroxy-4-n-octyloxydiphenyl, 3 parts of 2-(2-hydroxy-5-benzyl)benzotriazole.

[0079] The TPU masterbatch described in this embodiment is the same as that in Embodiment 1.

[0080] Present embodiment provides a kind of preparation method of high toughness, high tensile strength TPU film on the other hand, comprises the following steps:

[0081] (1) The prepared raw materials include TPU masterbatch, EMA 1126AC, BTA-751MBS, antioxidant 168, antioxidant 1076, 2-hydroxy-4-n-octyloxydiphenyl, 2-(2-hydroxy- 5-benzyl)benzotriazole is premixed, dried at 130°F for 3 hours, and tested for moisture after drying, and the mass percentage of moisture is ≤0....

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Abstract

The invention discloses a high-toughness and high-tensile-strength TPU (thermoplastic polyurethane) film and a preparation method thereof. The high-toughness and high-tensile-strength TPU film comprises the following components in parts by weight: 85-95 parts of TPU master batch, 0.5-10 parts of a flexibilizer and 1.5-8 parts of an assistant. The preparation method comprises the following steps: (1) premixing and drying the raw materials; (2) pushing the dried raw materials into a spiral sleeve by a motor of a single-screw extruder for melting; (3) molding the molten mixture through a mouth mold to obtain an extruded cast film; (4) cooling the casting film through a ceramic roller and a rubber roller, and adjusting the thickness; and (5) trimming and winding the cast film to obtain the TPU film. The TPU film prepared by the invention is uniform in thickness and has excellent toughness, tensile strength and fracture ductility, so that the TPU film is relatively good in repairability, also has relatively good yellowing resistance, and is very suitable for the field of automobile protective films.

Description

technical field [0001] The invention belongs to the field of film manufacture, and in particular relates to a TPU film with high toughness and high tensile strength and a preparation method thereof. Background technique [0002] During the actual use of the car, some bad weather will appear from time to time in the environment, such as sand, dust, acid rain, hail, etc., which will cause corrosion and impact damage to the protective paint on the car surface, which will lead to damage and cracking of the car paint etc. Usually, protective measures are waxing and polishing on the surface of the car paint, which requires regular maintenance of the car, which not only increases the economic burden, but also increases the time cost of the car owner. Therefore, under this background, more and more car owners choose to use car paint protection film. At present, the traditional car paint protection film uses PVC, but PVC film has disadvantages such as easy aging and poor repairabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L75/08C08L23/08C08L51/04B29C48/08B29C48/00B29L7/00
CPCC08J5/18B29C48/08B29C48/0011B29L2007/00C08J2375/08C08J2423/08C08J2451/04
Inventor 曹彦斌
Owner DELSTAR TECH SUZHOU
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